(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}(g.dicom || (g.dicom = {})).ts = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.render = exports.parseImage = exports.TransferSyntax = exports.Renderer = exports.Parser = void 0;

var _sha = _interopRequireDefault(require("sha1"));

var twgl = _interopRequireWildcard(require("twgl.js"));

var _dicomCharacterSet = require("@wearemothership/dicom-character-set");

var _pako = _interopRequireDefault(require("pako"));

var _jpegLosslessDecoderJs = require("jpeg-lossless-decoder-js");

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _extends() {
  _extends = Object.assign ? Object.assign.bind() : function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };
  return _extends.apply(this, arguments);
}

var TransferSyntax;
exports.TransferSyntax = TransferSyntax;

(function (TransferSyntax) {
  TransferSyntax["ImplicitLittle"] = "1.2.840.10008.1.2";
  TransferSyntax["ExplicitLittle"] = "1.2.840.10008.1.2.1";
  TransferSyntax["ExplicitBig"] = "1.2.840.10008.1.2.2";
  TransferSyntax["CompressionJpeg"] = "1.2.840.10008.1.2.4";
  TransferSyntax["CompressionJpegLossless"] = "1.2.840.10008.1.2.4.57";
  TransferSyntax["CompressionJpegLosslessSel1"] = "1.2.840.10008.1.2.4.70";
  TransferSyntax["CompressionJpegBaseline8bit"] = "1.2.840.10008.1.2.4.50";
  TransferSyntax["CompressionJpegBaseline12bit"] = "1.2.840.10008.1.2.4.51";
  TransferSyntax["CompressionJpegLsLossless"] = "1.2.840.10008.1.2.4.80";
  TransferSyntax["CompressionJpegLs"] = "1.2.840.10008.1.2.4.81";
  TransferSyntax["CompressionJpeg2000Lossless"] = "1.2.840.10008.1.2.4.90";
  TransferSyntax["CompressionJpeg2000"] = "1.2.840.10008.1.2.4.91";
  TransferSyntax["CompressionRLE"] = "1.2.840.10008.1.2.5";
  TransferSyntax["CompressionDeflate"] = "1.2.840.10008.1.2.1.99";
})(TransferSyntax || (exports.TransferSyntax = TransferSyntax = {}));

var PixelRepresentation;

(function (PixelRepresentation) {
  PixelRepresentation[PixelRepresentation["UInt"] = 0] = "UInt";
  PixelRepresentation[PixelRepresentation["Int"] = 1] = "Int";
})(PixelRepresentation || (PixelRepresentation = {}));

var SliceDirection;

(function (SliceDirection) {
  SliceDirection[SliceDirection["Unknown"] = -1] = "Unknown";
  SliceDirection[SliceDirection["Axial"] = 2] = "Axial";
  SliceDirection[SliceDirection["Coronal"] = 1] = "Coronal";
  SliceDirection[SliceDirection["Sagittal"] = 0] = "Sagittal";
  SliceDirection[SliceDirection["Oblique"] = 3] = "Oblique";
})(SliceDirection || (SliceDirection = {}));

var ByteType;

(function (ByteType) {
  ByteType[ByteType["Unkown"] = 0] = "Unkown";
  ByteType[ByteType["Binary"] = 1] = "Binary";
  ByteType[ByteType["Integer"] = 2] = "Integer";
  ByteType[ByteType["IntegerUnsigned"] = 3] = "IntegerUnsigned";
  ByteType[ByteType["Float"] = 4] = "Float";
  ByteType[ByteType["Complex"] = 5] = "Complex";
  ByteType[ByteType["Rgb"] = 6] = "Rgb";
})(ByteType || (ByteType = {}));

const DefaultCharset = "ISO 2022 IR 6";
/* eslint-disable no-bitwise */

let crcTable;
const MAX_VALUE = 9007199254740991;
const MIN_VALUE = -9007199254740991;

const dec2hex$1 = i => (i + 0x10000).toString(16).substr(-4).toUpperCase();

const getStringAt = (dataview, start, length, charset, vr) => {
  const strBuff = new Uint8Array(dataview.buffer, dataview.byteOffset + start, length);
  let str = (0, _dicomCharacterSet.convertBytes)(charset || DefaultCharset, strBuff, {
    vr
  });

  while (str && str.charCodeAt(str.length - 1) === 0) {
    str = str.slice(0, -1);
  }

  return str;
};

const stripLeadingZeros = str => str.replace(/^[0]+/g, "");

const safeParseInt = str => {
  const intStr = stripLeadingZeros(str);

  if (intStr.length > 0) {
    return parseInt(intStr, 10);
  }

  return 0;
};

const convertCamcelCaseToTitleCase = str => {
  const result = str.replace(/([A-Z][a-z])/g, " $1");
  return (result.charAt(0).toUpperCase() + result.slice(1)).trim();
};

const safeParseFloat = str => {
  const floatStr = stripLeadingZeros(str);

  if (floatStr.length > 0) {
    return parseFloat(floatStr);
  }

  return 0;
}; // http://stackoverflow.com/questions/8361086/convert-byte-array-to-numbers-in-javascript


const bytesToDouble = data => {
  const [b0, b1, b2, b3, b4, b5, b6, b7] = data;
  const sign = (b0 & 1 << 7) >> 7;
  const exponent = (b0 & 127) << 4 | (b1 & 15 << 4) >> 4;

  if (exponent === 0) {
    return 0;
  }

  if (exponent === 0x7ff) {
    return sign ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;
  }

  const mul = 2 ** exponent - 1023 - 52;
  const mantissa = b7 + b6 * 2 ** 8 + b5 * 2 ** (8 * 2) + b4 * 2 ** (8 * 3) + b3 * 2 ** (8 * 4) + b2 * 2 ** (8 * 5) + (b1 & 15) * 2 ** (8 * 6) + 2 ** 52;
  return (-1) ** sign * mantissa * mul;
};

const concatArrayBuffers = (buffer1, buffer2) => {
  const tmp = new Uint8Array(buffer1.byteLength + buffer2.byteLength);
  tmp.set(new Uint8Array(buffer1), 0);
  tmp.set(new Uint8Array(buffer2), buffer1.byteLength);
  return tmp.buffer;
};

const toArrayBuffer = buffer => {
  const ab = new ArrayBuffer(buffer.length);
  const view = new Uint8Array(ab);

  for (let i = 0; i < buffer.length; i += 1) {
    view[i] = buffer[i];
  }

  return ab;
}; // http://stackoverflow.com/questions/203739/why-does-instanceof-return-false-for-some-literals


const isString = s => typeof s === "string" || s instanceof String; // http://stackoverflow.com/questions/1353684/detecting-an-invalid-date-date-instance-in-javascript


const isValidDate = d => {
  if (Object.prototype.toString.call(d) === "[object Date]") {
    // eslint-disable-next-line no-restricted-globals
    if (isNaN(d.getTime())) {
      return false;
    }

    return true;
  }

  return false;
};

const swap32 = val => (val & 0xFF) << 24 | (val & 0xFF00) << 8 | val >> 8 & 0xFF00 | val >> 24 & 0xFF;

const swap16 = val => ((val & 0xFF) << 8 | val >> 8 & 0xFF) << 16 >> 16 // since JS uses 32-bit when bit shifting
; // http://stackoverflow.com/questions/18638900/javascript-crc32


const makeCRCTable = () => {
  crcTable = crcTable || Array(256);

  for (let n = 0; n < 256; n += 1) {
    let c = n;

    for (let k = 0; k < 8; k += 1) {
      c = c & 1 ? 0xEDB88320 ^ c >>> 1 : c >>> 1;
    }

    crcTable[n] = c;
  }

  return crcTable;
};

const crc32 = dataView => {
  crcTable = crcTable || makeCRCTable();
  let crc = 0 ^ -1;

  for (let i = 0; i < dataView.byteLength; i += 1) {
    crc = crc >>> 8 ^ crcTable[(crc ^ dataView.getUint8(i)) & 0xFF];
  }

  return (crc ^ -1) >>> 0;
};

const createBitMask = (numBytes, bitsStored, unsigned) => {
  let mask = 0xFFFFFFFF;
  mask >>>= (4 - numBytes) * 8 + (numBytes * 8 - bitsStored);

  if (unsigned) {
    if (numBytes === 1) {
      mask &= 0x000000FF;
    } else if (numBytes === 2) {
      mask &= 0x0000FFFF;
    } else if (numBytes === 4) {
      mask &= 0xFFFFFFFF;
    } else if (numBytes === 8) {
      mask = 0xFFFFFFFF;
    }
  } else {
    mask = 0xFFFFFFFF;
  }

  return mask;
};

var Utils = {
  __proto__: null,
  MAX_VALUE: MAX_VALUE,
  MIN_VALUE: MIN_VALUE,
  dec2hex: dec2hex$1,
  getStringAt: getStringAt,
  stripLeadingZeros: stripLeadingZeros,
  safeParseInt: safeParseInt,
  convertCamcelCaseToTitleCase: convertCamcelCaseToTitleCase,
  safeParseFloat: safeParseFloat,
  bytesToDouble: bytesToDouble,
  concatArrayBuffers: concatArrayBuffers,
  toArrayBuffer: toArrayBuffer,
  isString: isString,
  isValidDate: isValidDate,
  swap32: swap32,
  swap16: swap16,
  makeCRCTable: makeCRCTable,
  crc32: crc32,
  createBitMask: createBitMask
};
const {
  dec2hex
} = Utils;
const dictPrivate = {
  "0207": {
    "101F": ["FE", "ElscintDataScale"] // uses special Elscint double type (see Tag class)

  }
}; // strange bug in eslint, thinks the integer prop keys should not be in quotes!

/* eslint-disable  quote-props */

const dict = {
  "0002": {
    "0001": ["OB", "FileMetaInformationVersion"],
    "0002": ["UI", "MediaStoredSOPClassUID"],
    "0003": ["UI", "MediaStoredSOPInstanceUID"],
    "0010": ["UI", "TransferSyntaxUID"],
    "0012": ["UI", "ImplementationClassUID"],
    "0013": ["SH", "ImplementationVersionName"],
    "0016": ["AE", "SourceApplicationEntityTitle"],
    "0100": ["UI", "PrivateInformationCreatorUID"],
    "0102": ["OB", "PrivateInformation"]
  },
  "0004": {
    "1130": ["CS", "FilesetID"],
    "1141": ["CS", "FilesetDescriptorFileFileID"],
    "1142": ["CS", "FilesetDescriptorFileFormat"],
    "1200": ["UL", "RootDirectoryEntitysFirstDirectoryRecordOffset"],
    "1202": ["UL", "RootDirectoryEntitysLastDirectoryRecordOffset"],
    "1212": ["US", "File-setConsistenceFlag"],
    "1220": ["SQ", "DirectoryRecordSequence"],
    "1400": ["UL", "NextDirectoryRecordOffset"],
    "1410": ["US", "RecordInuseFlag"],
    "1420": ["UL", "ReferencedLowerlevelDirectoryEntityOffset"],
    "1430": ["CS", "DirectoryRecordType"],
    "1432": ["UI", "PrivateRecordUID"],
    "1500": ["CS", "ReferencedFileID"],
    "1510": ["UI", "ReferencedSOPClassUIDInFile"],
    "1511": ["UI", "ReferencedSOPInstanceUIDInFile"],
    "1600": ["UL", "NumberOfReferences"]
  },
  "0008": {
    "0001": ["UL", "LengthToEnd"],
    "0005": ["CS", "SpecificCharacterSet"],
    "0006": ["SQ", "LanguageCodeSequence"],
    "0008": ["CS", "ImageType"],
    "0010": ["SH", "RecognitionCode"],
    "0012": ["DA", "InstanceCreationDate"],
    "0013": ["TM", "InstanceCreationTime"],
    "0014": ["UI", "InstanceCreatorUID"],
    "0016": ["UI", "SOPClassUID"],
    "0018": ["UI", "SOPInstanceUID"],
    "001A": ["UI", "RelatedGeneralSOPClassUID"],
    "001B": ["UI", "OriginalSpecializedSOPClassUID"],
    "0020": ["DA", "StudyDate"],
    "0021": ["DA", "SeriesDate"],
    "0022": ["DA", "AcquisitionDate"],
    "0023": ["DA", "ContentDate"],
    "0024": ["DA", "OverlayDate"],
    "0025": ["DA", "CurveDate"],
    "002A": ["DT", "AcquisitionDateTime"],
    "0030": ["TM", "StudyTime"],
    "0031": ["TM", "SeriesTime"],
    "0032": ["TM", "AcquisitionTime"],
    "0033": ["TM", "ContentTime"],
    "0034": ["TM", "OverlayTime"],
    "0035": ["TM", "CurveTime"],
    "0040": ["US", "DataSetType"],
    "0041": ["LO", "DataSetSubtype"],
    "0042": ["CS", "NuclearMedicineSeriesType"],
    "0050": ["SH", "AccessionNumber"],
    "0051": ["SQ", "IssuerOfAccessionNumberSequence"],
    "0052": ["CS", "QueryRetrieveLevel"],
    "0054": ["AE", "RetrieveAETitle"],
    "0056": ["CS", "InstanceAvailability"],
    "0058": ["UI", "FailedSOPInstanceUIDList"],
    "0060": ["CS", "Modality"],
    "0061": ["CS", "ModalitiesInStudy"],
    "0062": ["UI", "SOPClassesInStudy"],
    "0064": ["CS", "ConversionType"],
    "0068": ["CS", "PresentationIntentType"],
    "0070": ["LO", "Manufacturer"],
    "0080": ["LO", "InstitutionName"],
    "0081": ["ST", "InstitutionAddress"],
    "0082": ["SQ", "InstitutionCodeSequence"],
    "0090": ["PN", "ReferringPhysicianName"],
    "0092": ["ST", "ReferringPhysicianAddress"],
    "0094": ["SH", "ReferringPhysicianTelephoneNumbers"],
    "0096": ["SQ", "ReferringPhysicianIdentificationSequence"],
    "0100": ["SH", "CodeValue"],
    "0102": ["SH", "CodingSchemeDesignator"],
    "0103": ["SH", "CodingSchemeVersion"],
    "0104": ["LO", "CodeMeaning"],
    "0105": ["CS", "MappingResource"],
    "0106": ["DT", "ContextGroupVersion"],
    "0107": ["DT", "ContextGroupLocalVersion"],
    "010B": ["CS", "ContextGroupExtensionFlag"],
    "010C": ["UI", "CodingSchemeUID"],
    "010D": ["UI", "ContextGroupExtensionCreatorUID"],
    "010F": ["CS", "ContextIdentifier"],
    "0110": ["SQ", "CodingSchemeIdentificationSequence"],
    "0112": ["LO", "CodingSchemeRegistry"],
    "0114": ["ST", "CodingSchemeExternalID"],
    "0115": ["ST", "CodingSchemeName"],
    "0116": ["ST", "CodingSchemeResponsibleOrganization"],
    "0117": ["UI", "ContextUID"],
    "0201": ["SH", "TimezoneOffsetFromUTC"],
    "1000": ["AE", "NetworkID"],
    "1010": ["SH", "StationName"],
    "1030": ["LO", "StudyDescription"],
    "1032": ["SQ", "ProcedureCodeSequence"],
    "103E": ["LO", "SeriesDescription"],
    "103F": ["SQ", "SeriesDescriptionCodeSequence"],
    "1040": ["LO", "InstitutionalDepartmentName"],
    "1048": ["PN", "PhysiciansOfRecord"],
    "1049": ["SQ", "PhysiciansOfRecordIdentificationSequence"],
    "1050": ["PN", "PerformingPhysicianName"],
    "1052": ["SQ", "PerformingPhysicianIdentificationSequence"],
    "1060": ["PN", "NameOfPhysiciansReadingStudy"],
    "1062": ["SQ", "PhysiciansReadingStudyIdentificationSequence"],
    "1070": ["PN", "OperatorsName"],
    "1072": ["SQ", "OperatorIdentificationSequence"],
    "1080": ["LO", "AdmittingDiagnosesDescription"],
    "1084": ["SQ", "AdmittingDiagnosesCodeSequence"],
    "1090": ["LO", "ManufacturerModelName"],
    "1100": ["SQ", "ReferencedResultsSequence"],
    "1110": ["SQ", "ReferencedStudySequence"],
    "1111": ["SQ", "ReferencedPerformedProcedureStepSequence"],
    "1115": ["SQ", "ReferencedSeriesSequence"],
    "1120": ["SQ", "ReferencedPatientSequence"],
    "1125": ["SQ", "ReferencedVisitSequence"],
    "1130": ["SQ", "ReferencedOverlaySequence"],
    "1134": ["SQ", "ReferencedStereometricInstanceSequence"],
    "113A": ["SQ", "ReferencedWaveformSequence"],
    "1140": ["SQ", "ReferencedImageSequence"],
    "1145": ["SQ", "ReferencedCurveSequence"],
    "114A": ["SQ", "ReferencedInstanceSequence"],
    "114B": ["SQ", "ReferencedRealWorldValueMappingInstanceSequence"],
    "1150": ["UI", "ReferencedSOPClassUID"],
    "1155": ["UI", "ReferencedSOPInstanceUID"],
    "115A": ["UI", "SOPClassesSupported"],
    "1160": ["IS", "ReferencedFrameNumber"],
    "1161": ["UL", "SimpleFrameList"],
    "1162": ["UL", "CalculatedFrameList"],
    "1163": ["FD", "TimeRange"],
    "1164": ["SQ", "FrameExtractionSequence"],
    "1167": ["UI", "MultiFrameSourceSOPInstanceUID"],
    "1195": ["UI", "TransactionUID"],
    "1197": ["US", "FailureReason"],
    "1198": ["SQ", "FailedSOPSequence"],
    "1199": ["SQ", "ReferencedSOPSequence"],
    "1200": ["SQ", "StudiesContainingOtherReferencedInstancesSequence"],
    "1250": ["SQ", "RelatedSeriesSequence"],
    "2110": ["CS", "LossyImageCompressionRetired"],
    "2111": ["ST", "DerivationDescription"],
    "2112": ["SQ", "SourceImageSequence"],
    "2120": ["SH", "StageName"],
    "2122": ["IS", "StageNumber"],
    "2124": ["IS", "NumberOfStages"],
    "2127": ["SH", "ViewName"],
    "2128": ["IS", "ViewNumber"],
    "2129": ["IS", "NumberOfEventTimers"],
    "212A": ["IS", "NumberOfViewsInStage"],
    "2130": ["DS", "EventElapsedTimes"],
    "2132": ["LO", "EventTimerNames"],
    "2133": ["SQ", "EventTimerSequence"],
    "2134": ["FD", "EventTimeOffset"],
    "2135": ["SQ", "EventCodeSequence"],
    "2142": ["IS", "StartTrim"],
    "2143": ["IS", "StopTrim"],
    "2144": ["IS", "RecommendedDisplayFrameRate"],
    "2200": ["CS", "TransducerPosition"],
    "2204": ["CS", "TransducerOrientation"],
    "2208": ["CS", "AnatomicStructure"],
    "2218": ["SQ", "AnatomicRegionSequence"],
    "2220": ["SQ", "AnatomicRegionModifierSequence"],
    "2228": ["SQ", "PrimaryAnatomicStructureSequence"],
    "2229": ["SQ", "AnatomicStructureSpaceOrRegionSequence"],
    "2230": ["SQ", "PrimaryAnatomicStructureModifierSequence"],
    "2240": ["SQ", "TransducerPositionSequence"],
    "2242": ["SQ", "TransducerPositionModifierSequence"],
    "2244": ["SQ", "TransducerOrientationSequence"],
    "2246": ["SQ", "TransducerOrientationModifierSequence"],
    "2251": ["SQ", "AnatomicStructureSpaceOrRegionCodeSequenceTrial"],
    "2253": ["SQ", "AnatomicPortalOfEntranceCodeSequenceTrial"],
    "2255": ["SQ", "AnatomicApproachDirectionCodeSequenceTrial"],
    "2256": ["ST", "AnatomicPerspectiveDescriptionTrial"],
    "2257": ["SQ", "AnatomicPerspectiveCodeSequenceTrial"],
    "2258": ["ST", "AnatomicLocationOfExaminingInstrumentDescriptionTrial"],
    "2259": ["SQ", "AnatomicLocationOfExaminingInstrumentCodeSequenceTrial"],
    "225A": ["SQ", "AnatomicStructureSpaceOrRegionModifierCodeSequenceTrial"],
    "225C": ["SQ", "OnAxisBackgroundAnatomicStructureCodeSequenceTrial"],
    "3001": ["SQ", "AlternateRepresentationSequence"],
    "3010": ["UI", "IrradiationEventUID"],
    "4000": ["LT", "IdentifyingComments"],
    "9007": ["CS", "FrameType"],
    "9092": ["SQ", "ReferencedImageEvidenceSequence"],
    "9121": ["SQ", "ReferencedRawDataSequence"],
    "9123": ["UI", "CreatorVersionUID"],
    "9124": ["SQ", "DerivationImageSequence"],
    "9154": ["SQ", "SourceImageEvidenceSequence"],
    "9205": ["CS", "PixelPresentation"],
    "9206": ["CS", "VolumetricProperties"],
    "9207": ["CS", "VolumeBasedCalculationTechnique"],
    "9208": ["CS", "ComplexImageComponent"],
    "9209": ["CS", "AcquisitionContrast"],
    "9215": ["SQ", "DerivationCodeSequence"],
    "9237": ["SQ", "ReferencedPresentationStateSequence"],
    "9410": ["SQ", "ReferencedOtherPlaneSequence"],
    "9458": ["SQ", "FrameDisplaySequence"],
    "9459": ["FL", "RecommendedDisplayFrameRateInFloat"],
    "9460": ["CS", "SkipFrameRangeFlag"]
  },
  "0010": {
    "0010": ["PN", "PatientName"],
    "0020": ["LO", "PatientID"],
    "0021": ["LO", "IssuerOfPatientID"],
    "0022": ["CS", "TypeOfPatientID"],
    "0024": ["SQ", "IssuerOfPatientIDQualifiersSequence"],
    "0030": ["DA", "PatientBirthDate"],
    "0032": ["TM", "PatientBirthTime"],
    "0040": ["CS", "PatientSex"],
    "0050": ["SQ", "PatientInsurancePlanCodeSequence"],
    "0101": ["SQ", "PatientPrimaryLanguageCodeSequence"],
    "0102": ["SQ", "PatientPrimaryLanguageModifierCodeSequence"],
    "1000": ["LO", "OtherPatientIDs"],
    "1001": ["PN", "OtherPatientNames"],
    "1002": ["SQ", "OtherPatientIDsSequence"],
    "1005": ["PN", "PatientBirthName"],
    "1010": ["AS", "PatientAge"],
    "1020": ["DS", "PatientSize"],
    "1021": ["SQ", "PatientSizeCodeSequence"],
    "1030": ["DS", "PatientWeight"],
    "1040": ["LO", "PatientAddress"],
    "1050": ["LO", "InsurancePlanIdentification"],
    "1060": ["PN", "PatientMotherBirthName"],
    "1080": ["LO", "MilitaryRank"],
    "1081": ["LO", "BranchOfService"],
    "1090": ["LO", "MedicalRecordLocator"],
    "2000": ["LO", "MedicalAlerts"],
    "2110": ["LO", "Allergies"],
    "2150": ["LO", "CountryOfResidence"],
    "2152": ["LO", "RegionOfResidence"],
    "2154": ["SH", "PatientTelephoneNumbers"],
    "2160": ["SH", "EthnicGroup"],
    "2180": ["SH", "Occupation"],
    "21A0": ["CS", "SmokingStatus"],
    "21B0": ["LT", "AdditionalPatientHistory"],
    "21C0": ["US", "PregnancyStatus"],
    "21D0": ["DA", "LastMenstrualDate"],
    "21F0": ["LO", "PatientReligiousPreference"],
    "2201": ["LO", "PatientSpeciesDescription"],
    "2202": ["SQ", "PatientSpeciesCodeSequence"],
    "2203": ["CS", "PatientSexNeutered"],
    "2210": ["CS", "AnatomicalOrientationType"],
    "2292": ["LO", "PatientBreedDescription"],
    "2293": ["SQ", "PatientBreedCodeSequence"],
    "2294": ["SQ", "BreedRegistrationSequence"],
    "2295": ["LO", "BreedRegistrationNumber"],
    "2296": ["SQ", "BreedRegistryCodeSequence"],
    "2297": ["PN", "ResponsiblePerson"],
    "2298": ["CS", "ResponsiblePersonRole"],
    "2299": ["LO", "ResponsibleOrganization"],
    "4000": ["LT", "PatientComments"],
    "9431": ["FL", "ExaminedBodyThickness"]
  },
  "0012": {
    "0010": ["LO", "ClinicalTrialSponsorName"],
    "0020": ["LO", "ClinicalTrialProtocolID"],
    "0021": ["LO", "ClinicalTrialProtocolName"],
    "0030": ["LO", "ClinicalTrialSiteID"],
    "0031": ["LO", "ClinicalTrialSiteName"],
    "0040": ["LO", "ClinicalTrialSubjectID"],
    "0042": ["LO", "ClinicalTrialSubjectReadingID"],
    "0050": ["LO", "ClinicalTrialTimePointID"],
    "0051": ["ST", "ClinicalTrialTimePointDescription"],
    "0060": ["LO", "ClinicalTrialCoordinatingCenterName"],
    "0062": ["CS", "PatientIdentityRemoved"],
    "0063": ["LO", "DeidentificationMethod"],
    "0064": ["SQ", "DeidentificationMethodCodeSequence"],
    "0071": ["LO", "ClinicalTrialSeriesID"],
    "0072": ["LO", "ClinicalTrialSeriesDescription"],
    "0081": ["LO", "ClinicalTrialProtocolEthicsCommitteeName"],
    "0082": ["LO", "ClinicalTrialProtocolEthicsCommitteeApprovalNumber"],
    "0083": ["SQ", "ConsentForClinicalTrialUseSequence"],
    "0084": ["CS", "DistributionType"],
    "0085": ["CS", "ConsentForDistributionFlag"]
  },
  "0014": {
    "0023": ["ST", "CADFileFormat"],
    "0024": ["ST", "ComponentReferenceSystem"],
    "0025": ["ST", "ComponentManufacturingProcedure"],
    "0028": ["ST", "ComponentManufacturer"],
    "0030": ["DS", "MaterialThickness"],
    "0032": ["DS", "MaterialPipeDiameter"],
    "0034": ["DS", "MaterialIsolationDiameter"],
    "0042": ["ST", "MaterialGrade"],
    "0044": ["ST", "MaterialPropertiesFileID"],
    "0045": ["ST", "MaterialPropertiesFileFormat"],
    "0046": ["LT", "MaterialNotes"],
    "0050": ["CS", "ComponentShape"],
    "0052": ["CS", "CurvatureType"],
    "0054": ["DS", "OuterDiameter"],
    "0056": ["DS", "InnerDiameter"],
    "1010": ["ST", "ActualEnvironmentalConditions"],
    "1020": ["DA", "ExpiryDate"],
    "1040": ["ST", "EnvironmentalConditions"],
    "2002": ["SQ", "EvaluatorSequence"],
    "2004": ["IS", "EvaluatorNumber"],
    "2006": ["PN", "EvaluatorName"],
    "2008": ["IS", "EvaluationAttempt"],
    "2012": ["SQ", "IndicationSequence"],
    "2014": ["IS", "IndicationNumber "],
    "2016": ["SH", "IndicationLabel"],
    "2018": ["ST", "IndicationDescription"],
    "201A": ["CS", "IndicationType"],
    "201C": ["CS", "IndicationDisposition"],
    "201E": ["SQ", "IndicationROISequence"],
    "2030": ["SQ", "IndicationPhysicalPropertySequence"],
    "2032": ["SH", "PropertyLabel"],
    "2202": ["IS", "CoordinateSystemNumberOfAxes "],
    "2204": ["SQ", "CoordinateSystemAxesSequence"],
    "2206": ["ST", "CoordinateSystemAxisDescription"],
    "2208": ["CS", "CoordinateSystemDataSetMapping"],
    "220A": ["IS", "CoordinateSystemAxisNumber"],
    "220C": ["CS", "CoordinateSystemAxisType"],
    "220E": ["CS", "CoordinateSystemAxisUnits"],
    "2210": ["OB", "CoordinateSystemAxisValues"],
    "2220": ["SQ", "CoordinateSystemTransformSequence"],
    "2222": ["ST", "TransformDescription"],
    "2224": ["IS", "TransformNumberOfAxes"],
    "2226": ["IS", "TransformOrderOfAxes"],
    "2228": ["CS", "TransformedAxisUnits"],
    "222A": ["DS", "CoordinateSystemTransformRotationAndScaleMatrix"],
    "222C": ["DS", "CoordinateSystemTransformTranslationMatrix"],
    "3011": ["DS", "InternalDetectorFrameTime"],
    "3012": ["DS", "NumberOfFramesIntegrated"],
    "3020": ["SQ", "DetectorTemperatureSequence"],
    "3022": ["DS", "SensorName"],
    "3024": ["DS", "HorizontalOffsetOfSensor"],
    "3026": ["DS", "VerticalOffsetOfSensor"],
    "3028": ["DS", "SensorTemperature"],
    "3040": ["SQ", "DarkCurrentSequence"],
    "3050": ["OB", "DarkCurrentCounts"],
    "3060": ["SQ", "GainCorrectionReferenceSequence"],
    "3070": ["OB", "AirCounts"],
    "3071": ["DS", "KVUsedInGainCalibration"],
    "3072": ["DS", "MAUsedInGainCalibration"],
    "3073": ["DS", "NumberOfFramesUsedForIntegration"],
    "3074": ["LO", "FilterMaterialUsedInGainCalibration"],
    "3075": ["DS", "FilterThicknessUsedInGainCalibration"],
    "3076": ["DA", "DateOfGainCalibration"],
    "3077": ["TM", "TimeOfGainCalibration"],
    "3080": ["OB", "BadPixelImage"],
    "3099": ["LT", "CalibrationNotes"],
    "4002": ["SQ", "PulserEquipmentSequence"],
    "4004": ["CS", "PulserType"],
    "4006": ["LT", "PulserNotes"],
    "4008": ["SQ", "ReceiverEquipmentSequence"],
    "400A": ["CS", "AmplifierType"],
    "400C": ["LT", "ReceiverNotes"],
    "400E": ["SQ", "PreAmplifierEquipmentSequence"],
    "400F": ["LT", "PreAmplifierNotes"],
    "4010": ["SQ", "TransmitTransducerSequence"],
    "4011": ["SQ", "ReceiveTransducerSequence"],
    "4012": ["US", "NumberOfElements"],
    "4013": ["CS", "ElementShape"],
    "4014": ["DS", "ElementDimensionA"],
    "4015": ["DS", "ElementDimensionB"],
    "4016": ["DS", "ElementPitch"],
    "4017": ["DS", "MeasuredBeamDimensionA"],
    "4018": ["DS", "MeasuredBeamDimensionB"],
    "4019": ["DS", "LocationOfMeasuredBeamDiameter"],
    "401A": ["DS", "NominalFrequency"],
    "401B": ["DS", "MeasuredCenterFrequency"],
    "401C": ["DS", "MeasuredBandwidth"],
    "4020": ["SQ", "PulserSettingsSequence"],
    "4022": ["DS", "PulseWidth"],
    "4024": ["DS", "ExcitationFrequency"],
    "4026": ["CS", "ModulationType"],
    "4028": ["DS", "Damping"],
    "4030": ["SQ", "ReceiverSettingsSequence"],
    "4031": ["DS", "AcquiredSoundpathLength"],
    "4032": ["CS", "AcquisitionCompressionType"],
    "4033": ["IS", "AcquisitionSampleSize"],
    "4034": ["DS", "RectifierSmoothing"],
    "4035": ["SQ", "DACSequence"],
    "4036": ["CS", "DACType"],
    "4038": ["DS", "DACGainPoints"],
    "403A": ["DS", "DACTimePoints"],
    "403C": ["DS", "DACAmplitude"],
    "4040": ["SQ", "PreAmplifierSettingsSequence"],
    "4050": ["SQ", "TransmitTransducerSettingsSequence"],
    "4051": ["SQ", "ReceiveTransducerSettingsSequence"],
    "4052": ["DS", "IncidentAngle"],
    "4054": ["ST", "CouplingTechnique"],
    "4056": ["ST", "CouplingMedium"],
    "4057": ["DS", "CouplingVelocity"],
    "4058": ["DS", "CrystalCenterLocationX"],
    "4059": ["DS", "CrystalCenterLocationZ"],
    "405A": ["DS", "SoundPathLength"],
    "405C": ["ST", "DelayLawIdentifier"],
    "4060": ["SQ", "GateSettingsSequence"],
    "4062": ["DS", "GateThreshold"],
    "4064": ["DS", "VelocityOfSound"],
    "4070": ["SQ", "CalibrationSettingsSequence"],
    "4072": ["ST", "CalibrationProcedure"],
    "4074": ["SH", "ProcedureVersion"],
    "4076": ["DA", "ProcedureCreationDate"],
    "4078": ["DA", "ProcedureExpirationDate"],
    "407A": ["DA", "ProcedureLastModifiedDate"],
    "407C": ["TM", "CalibrationTime"],
    "407E": ["DA", "CalibrationDate"],
    "5002": ["IS", "LINACEnergy"],
    "5004": ["IS", "LINACOutput"]
  },
  "0018": {
    "0010": ["LO", "ContrastBolusAgent"],
    "0012": ["SQ", "ContrastBolusAgentSequence"],
    "0014": ["SQ", "ContrastBolusAdministrationRouteSequence"],
    "0015": ["CS", "BodyPartExamined"],
    "0020": ["CS", "ScanningSequence"],
    "0021": ["CS", "SequenceVariant"],
    "0022": ["CS", "ScanOptions"],
    "0023": ["CS", "MRAcquisitionType"],
    "0024": ["SH", "SequenceName"],
    "0025": ["CS", "AngioFlag"],
    "0026": ["SQ", "InterventionDrugInformationSequence"],
    "0027": ["TM", "InterventionDrugStopTime"],
    "0028": ["DS", "InterventionDrugDose"],
    "0029": ["SQ", "InterventionDrugCodeSequence"],
    "002A": ["SQ", "AdditionalDrugSequence"],
    "0030": ["LO", "Radionuclide"],
    "0031": ["LO", "Radiopharmaceutical"],
    "0032": ["DS", "EnergyWindowCenterline"],
    "0033": ["DS", "EnergyWindowTotalWidth"],
    "0034": ["LO", "InterventionDrugName"],
    "0035": ["TM", "InterventionDrugStartTime"],
    "0036": ["SQ", "InterventionSequence"],
    "0037": ["CS", "TherapyType"],
    "0038": ["CS", "InterventionStatus"],
    "0039": ["CS", "TherapyDescription"],
    "003A": ["ST", "InterventionDescription"],
    "0040": ["IS", "CineRate"],
    "0042": ["CS", "InitialCineRunState"],
    "0050": ["DS", "SliceThickness"],
    "0060": ["DS", "KVP"],
    "0070": ["IS", "CountsAccumulated"],
    "0071": ["CS", "AcquisitionTerminationCondition"],
    "0072": ["DS", "EffectiveDuration"],
    "0073": ["CS", "AcquisitionStartCondition"],
    "0074": ["IS", "AcquisitionStartConditionData"],
    "0075": ["IS", "AcquisitionTerminationConditionData"],
    "0080": ["DS", "RepetitionTime"],
    "0081": ["DS", "EchoTime"],
    "0082": ["DS", "InversionTime"],
    "0083": ["DS", "NumberOfAverages"],
    "0084": ["DS", "ImagingFrequency"],
    "0085": ["SH", "ImagedNucleus"],
    "0086": ["IS", "EchoNumbers"],
    "0087": ["DS", "MagneticFieldStrength"],
    "0088": ["DS", "SpacingBetweenSlices"],
    "0089": ["IS", "NumberOfPhaseEncodingSteps"],
    "0090": ["DS", "DataCollectionDiameter"],
    "0091": ["IS", "EchoTrainLength"],
    "0093": ["DS", "PercentSampling"],
    "0094": ["DS", "PercentPhaseFieldOfView"],
    "0095": ["DS", "PixelBandwidth"],
    "1000": ["LO", "DeviceSerialNumber"],
    "1002": ["UI", "DeviceUID"],
    "1003": ["LO", "DeviceID"],
    "1004": ["LO", "PlateID"],
    "1005": ["LO", "GeneratorID"],
    "1006": ["LO", "GridID"],
    "1007": ["LO", "CassetteID"],
    "1008": ["LO", "GantryID"],
    "1010": ["LO", "SecondaryCaptureDeviceID"],
    "1011": ["LO", "HardcopyCreationDeviceID"],
    "1012": ["DA", "DateOfSecondaryCapture"],
    "1014": ["TM", "TimeOfSecondaryCapture"],
    "1016": ["LO", "SecondaryCaptureDeviceManufacturer"],
    "1017": ["LO", "HardcopyDeviceManufacturer"],
    "1018": ["LO", "SecondaryCaptureDeviceManufacturerModelName"],
    "1019": ["LO", "SecondaryCaptureDeviceSoftwareVersions"],
    "101A": ["LO", "HardcopyDeviceSoftwareVersion"],
    "101B": ["LO", "HardcopyDeviceManufacturerModelName"],
    "1020": ["LO", "SoftwareVersions"],
    "1022": ["SH", "VideoImageFormatAcquired"],
    "1023": ["LO", "DigitalImageFormatAcquired"],
    "1030": ["LO", "ProtocolName"],
    "1040": ["LO", "ContrastBolusRoute"],
    "1041": ["DS", "ContrastBolusVolume"],
    "1042": ["TM", "ContrastBolusStartTime"],
    "1043": ["TM", "ContrastBolusStopTime"],
    "1044": ["DS", "ContrastBolusTotalDose"],
    "1045": ["IS", "SyringeCounts"],
    "1046": ["DS", "ContrastFlowRate"],
    "1047": ["DS", "ContrastFlowDuration"],
    "1048": ["CS", "ContrastBolusIngredient"],
    "1049": ["DS", "ContrastBolusIngredientConcentration"],
    "1050": ["DS", "SpatialResolution"],
    "1060": ["DS", "TriggerTime"],
    "1061": ["LO", "TriggerSourceOrType"],
    "1062": ["IS", "NominalInterval"],
    "1063": ["DS", "FrameTime"],
    "1064": ["LO", "CardiacFramingType"],
    "1065": ["DS", "FrameTimeVector"],
    "1066": ["DS", "FrameDelay"],
    "1067": ["DS", "ImageTriggerDelay"],
    "1068": ["DS", "MultiplexGroupTimeOffset"],
    "1069": ["DS", "TriggerTimeOffset"],
    "106A": ["CS", "SynchronizationTrigger"],
    "106C": ["US", "SynchronizationChannel"],
    "106E": ["UL", "TriggerSamplePosition"],
    "1070": ["LO", "RadiopharmaceuticalRoute"],
    "1071": ["DS", "RadiopharmaceuticalVolume"],
    "1072": ["TM", "RadiopharmaceuticalStartTime"],
    "1073": ["TM", "RadiopharmaceuticalStopTime"],
    "1074": ["DS", "RadionuclideTotalDose"],
    "1075": ["DS", "RadionuclideHalfLife"],
    "1076": ["DS", "RadionuclidePositronFraction"],
    "1077": ["DS", "RadiopharmaceuticalSpecificActivity"],
    "1078": ["DT", "RadiopharmaceuticalStartDateTime"],
    "1079": ["DT", "RadiopharmaceuticalStopDateTime"],
    "1080": ["CS", "BeatRejectionFlag"],
    "1081": ["IS", "LowRRValue"],
    "1082": ["IS", "HighRRValue"],
    "1083": ["IS", "IntervalsAcquired"],
    "1084": ["IS", "IntervalsRejected"],
    "1085": ["LO", "PVCRejection"],
    "1086": ["IS", "SkipBeats"],
    "1088": ["IS", "HeartRate"],
    "1090": ["IS", "CardiacNumberOfImages"],
    "1094": ["IS", "TriggerWindow"],
    "1100": ["DS", "ReconstructionDiameter"],
    "1110": ["DS", "DistanceSourceToDetector"],
    "1111": ["DS", "DistanceSourceToPatient"],
    "1114": ["DS", "EstimatedRadiographicMagnificationFactor"],
    "1120": ["DS", "GantryDetectorTilt"],
    "1121": ["DS", "GantryDetectorSlew"],
    "1130": ["DS", "TableHeight"],
    "1131": ["DS", "TableTraverse"],
    "1134": ["CS", "TableMotion"],
    "1135": ["DS", "TableVerticalIncrement"],
    "1136": ["DS", "TableLateralIncrement"],
    "1137": ["DS", "TableLongitudinalIncrement"],
    "1138": ["DS", "TableAngle"],
    "113A": ["CS", "TableType"],
    "1140": ["CS", "RotationDirection"],
    "1141": ["DS", "AngularPosition"],
    "1142": ["DS", "RadialPosition"],
    "1143": ["DS", "ScanArc"],
    "1144": ["DS", "AngularStep"],
    "1145": ["DS", "CenterOfRotationOffset"],
    "1146": ["DS", "RotationOffset"],
    "1147": ["CS", "FieldOfViewShape"],
    "1149": ["IS", "FieldOfViewDimensions"],
    "1150": ["IS", "ExposureTime"],
    "1151": ["IS", "XRayTubeCurrent"],
    "1152": ["IS", "Exposure"],
    "1153": ["IS", "ExposureInuAs"],
    "1154": ["DS", "AveragePulseWidth"],
    "1155": ["CS", "RadiationSetting"],
    "1156": ["CS", "RectificationType"],
    "115A": ["CS", "RadiationMode"],
    "115E": ["DS", "ImageAndFluoroscopyAreaDoseProduct"],
    "1160": ["SH", "FilterType"],
    "1161": ["LO", "TypeOfFilters"],
    "1162": ["DS", "IntensifierSize"],
    "1164": ["DS", "ImagerPixelSpacing"],
    "1166": ["CS", "Grid"],
    "1170": ["IS", "GeneratorPower"],
    "1180": ["SH", "CollimatorGridName"],
    "1181": ["CS", "CollimatorType"],
    "1182": ["IS", "FocalDistance"],
    "1183": ["DS", "XFocusCenter"],
    "1184": ["DS", "YFocusCenter"],
    "1190": ["DS", "FocalSpots"],
    "1191": ["CS", "AnodeTargetMaterial"],
    "11A0": ["DS", "BodyPartThickness"],
    "11A2": ["DS", "CompressionForce"],
    "1200": ["DA", "DateOfLastCalibration"],
    "1201": ["TM", "TimeOfLastCalibration"],
    "1210": ["SH", "ConvolutionKernel"],
    "1240": ["IS", "UpperLowerPixelValues"],
    "1242": ["IS", "ActualFrameDuration"],
    "1243": ["IS", "CountRate"],
    "1244": ["US", "PreferredPlaybackSequencing"],
    "1250": ["SH", "ReceiveCoilName"],
    "1251": ["SH", "TransmitCoilName"],
    "1260": ["SH", "PlateType"],
    "1261": ["LO", "PhosphorType"],
    "1300": ["DS", "ScanVelocity"],
    "1301": ["CS", "WholeBodyTechnique"],
    "1302": ["IS", "ScanLength"],
    "1310": ["US", "AcquisitionMatrix"],
    "1312": ["CS", "InPlanePhaseEncodingDirection"],
    "1314": ["DS", "FlipAngle"],
    "1315": ["CS", "VariableFlipAngleFlag"],
    "1316": ["DS", "SAR"],
    "1318": ["DS", "dBdt"],
    "1400": ["LO", "AcquisitionDeviceProcessingDescription"],
    "1401": ["LO", "AcquisitionDeviceProcessingCode"],
    "1402": ["CS", "CassetteOrientation"],
    "1403": ["CS", "CassetteSize"],
    "1404": ["US", "ExposuresOnPlate"],
    "1405": ["IS", "RelativeXRayExposure"],
    "1411": ["DS", "ExposureIndex"],
    "1412": ["DS", "TargetExposureIndex"],
    "1413": ["DS", "DeviationIndex"],
    "1450": ["DS", "ColumnAngulation"],
    "1460": ["DS", "TomoLayerHeight"],
    "1470": ["DS", "TomoAngle"],
    "1480": ["DS", "TomoTime"],
    "1490": ["CS", "TomoType"],
    "1491": ["CS", "TomoClass"],
    "1495": ["IS", "NumberOfTomosynthesisSourceImages"],
    "1500": ["CS", "PositionerMotion"],
    "1508": ["CS", "PositionerType"],
    "1510": ["DS", "PositionerPrimaryAngle"],
    "1511": ["DS", "PositionerSecondaryAngle"],
    "1520": ["DS", "PositionerPrimaryAngleIncrement"],
    "1521": ["DS", "PositionerSecondaryAngleIncrement"],
    "1530": ["DS", "DetectorPrimaryAngle"],
    "1531": ["DS", "DetectorSecondaryAngle"],
    "1600": ["CS", "ShutterShape"],
    "1602": ["IS", "ShutterLeftVerticalEdge"],
    "1604": ["IS", "ShutterRightVerticalEdge"],
    "1606": ["IS", "ShutterUpperHorizontalEdge"],
    "1608": ["IS", "ShutterLowerHorizontalEdge"],
    "1610": ["IS", "CenterOfCircularShutter"],
    "1612": ["IS", "RadiusOfCircularShutter"],
    "1620": ["IS", "VerticesOfThePolygonalShutter"],
    "1622": ["US", "ShutterPresentationValue"],
    "1623": ["US", "ShutterOverlayGroup"],
    "1624": ["US", "ShutterPresentationColorCIELabValue"],
    "1700": ["CS", "CollimatorShape"],
    "1702": ["IS", "CollimatorLeftVerticalEdge"],
    "1704": ["IS", "CollimatorRightVerticalEdge"],
    "1706": ["IS", "CollimatorUpperHorizontalEdge"],
    "1708": ["IS", "CollimatorLowerHorizontalEdge"],
    "1710": ["IS", "CenterOfCircularCollimator"],
    "1712": ["IS", "RadiusOfCircularCollimator"],
    "1720": ["IS", "VerticesOfThePolygonalCollimator"],
    "1800": ["CS", "AcquisitionTimeSynchronized"],
    "1801": ["SH", "TimeSource"],
    "1802": ["CS", "TimeDistributionProtocol"],
    "1803": ["LO", "NTPSourceAddress"],
    "2001": ["IS", "PageNumberVector"],
    "2002": ["SH", "FrameLabelVector"],
    "2003": ["DS", "FramePrimaryAngleVector"],
    "2004": ["DS", "FrameSecondaryAngleVector"],
    "2005": ["DS", "SliceLocationVector"],
    "2006": ["SH", "DisplayWindowLabelVector"],
    "2010": ["DS", "NominalScannedPixelSpacing"],
    "2020": ["CS", "DigitizingDeviceTransportDirection"],
    "2030": ["DS", "RotationOfScannedFilm"],
    "3100": ["CS", "IVUSAcquisition"],
    "3101": ["DS", "IVUSPullbackRate"],
    "3102": ["DS", "IVUSGatedRate"],
    "3103": ["IS", "IVUSPullbackStartFrameNumber"],
    "3104": ["IS", "IVUSPullbackStopFrameNumber"],
    "3105": ["IS", "LesionNumber"],
    "4000": ["LT", "AcquisitionComments"],
    "5000": ["SH", "OutputPower"],
    "5010": ["LO", "TransducerData"],
    "5012": ["DS", "FocusDepth"],
    "5020": ["LO", "ProcessingFunction"],
    "5021": ["LO", "PostprocessingFunction"],
    "5022": ["DS", "MechanicalIndex"],
    "5024": ["DS", "BoneThermalIndex"],
    "5026": ["DS", "CranialThermalIndex"],
    "5027": ["DS", "SoftTissueThermalIndex"],
    "5028": ["DS", "SoftTissueFocusThermalIndex"],
    "5029": ["DS", "SoftTissueSurfaceThermalIndex"],
    "5030": ["DS", "DynamicRange"],
    "5040": ["DS", "TotalGain"],
    "5050": ["IS", "DepthOfScanField"],
    "5100": ["CS", "PatientPosition"],
    "5101": ["CS", "ViewPosition"],
    "5104": ["SQ", "ProjectionEponymousNameCodeSequence"],
    "5210": ["DS", "ImageTransformationMatrix"],
    "5212": ["DS", "ImageTranslationVector"],
    "6000": ["DS", "Sensitivity"],
    "6011": ["SQ", "SequenceOfUltrasoundRegions"],
    "6012": ["US", "RegionSpatialFormat"],
    "6014": ["US", "RegionDataType"],
    "6016": ["UL", "RegionFlags"],
    "6018": ["UL", "RegionLocationMinX0"],
    "601A": ["UL", "RegionLocationMinY0"],
    "601C": ["UL", "RegionLocationMaxX1"],
    "601E": ["UL", "RegionLocationMaxY1"],
    "6020": ["SL", "ReferencePixelX0"],
    "6022": ["SL", "ReferencePixelY0"],
    "6024": ["US", "PhysicalUnitsXDirection"],
    "6026": ["US", "PhysicalUnitsYDirection"],
    "6028": ["FD", "ReferencePixelPhysicalValueX"],
    "602A": ["FD", "ReferencePixelPhysicalValueY"],
    "602C": ["FD", "PhysicalDeltaX"],
    "602E": ["FD", "PhysicalDeltaY"],
    "6030": ["UL", "TransducerFrequency"],
    "6031": ["CS", "TransducerType"],
    "6032": ["UL", "PulseRepetitionFrequency"],
    "6034": ["FD", "DopplerCorrectionAngle"],
    "6036": ["FD", "SteeringAngle"],
    "6038": ["UL", "DopplerSampleVolumeXPositionRetired"],
    "6039": ["SL", "DopplerSampleVolumeXPosition"],
    "603A": ["UL", "DopplerSampleVolumeYPositionRetired"],
    "603B": ["SL", "DopplerSampleVolumeYPosition"],
    "603C": ["UL", "TMLinePositionX0Retired"],
    "603D": ["SL", "TMLinePositionX0"],
    "603E": ["UL", "TMLinePositionY0Retired"],
    "603F": ["SL", "TMLinePositionY0"],
    "6040": ["UL", "TMLinePositionX1Retired"],
    "6041": ["SL", "TMLinePositionX1"],
    "6042": ["UL", "TMLinePositionY1Retired"],
    "6043": ["SL", "TMLinePositionY1"],
    "6044": ["US", "PixelComponentOrganization"],
    "6046": ["UL", "PixelComponentMask"],
    "6048": ["UL", "PixelComponentRangeStart"],
    "604A": ["UL", "PixelComponentRangeStop"],
    "604C": ["US", "PixelComponentPhysicalUnits"],
    "604E": ["US", "PixelComponentDataType"],
    "6050": ["UL", "NumberOfTableBreakPoints"],
    "6052": ["UL", "TableOfXBreakPoints"],
    "6054": ["FD", "TableOfYBreakPoints"],
    "6056": ["UL", "NumberOfTableEntries"],
    "6058": ["UL", "TableOfPixelValues"],
    "605A": ["FL", "TableOfParameterValues"],
    "6060": ["FL", "RWaveTimeVector"],
    "7000": ["CS", "DetectorConditionsNominalFlag"],
    "7001": ["DS", "DetectorTemperature"],
    "7004": ["CS", "DetectorType"],
    "7005": ["CS", "DetectorConfiguration"],
    "7006": ["LT", "DetectorDescription"],
    "7008": ["LT", "DetectorMode"],
    "700A": ["SH", "DetectorID"],
    "700C": ["DA", "DateOfLastDetectorCalibration"],
    "700E": ["TM", "TimeOfLastDetectorCalibration"],
    "7010": ["IS", "ExposuresOnDetectorSinceLastCalibration"],
    "7011": ["IS", "ExposuresOnDetectorSinceManufactured"],
    "7012": ["DS", "DetectorTimeSinceLastExposure"],
    "7014": ["DS", "DetectorActiveTime"],
    "7016": ["DS", "DetectorActivationOffsetFromExposure"],
    "701A": ["DS", "DetectorBinning"],
    "7020": ["DS", "DetectorElementPhysicalSize"],
    "7022": ["DS", "DetectorElementSpacing"],
    "7024": ["CS", "DetectorActiveShape"],
    "7026": ["DS", "DetectorActiveDimensions"],
    "7028": ["DS", "DetectorActiveOrigin"],
    "702A": ["LO", "DetectorManufacturerName"],
    "702B": ["LO", "DetectorManufacturerModelName"],
    "7030": ["DS", "FieldOfViewOrigin"],
    "7032": ["DS", "FieldOfViewRotation"],
    "7034": ["CS", "FieldOfViewHorizontalFlip"],
    "7036": ["FL", "PixelDataAreaOriginRelativeToFOV"],
    "7038": ["FL", "PixelDataAreaRotationAngleRelativeToFOV"],
    "7040": ["LT", "GridAbsorbingMaterial"],
    "7041": ["LT", "GridSpacingMaterial"],
    "7042": ["DS", "GridThickness"],
    "7044": ["DS", "GridPitch"],
    "7046": ["IS", "GridAspectRatio"],
    "7048": ["DS", "GridPeriod"],
    "704C": ["DS", "GridFocalDistance"],
    "7050": ["CS", "FilterMaterial"],
    "7052": ["DS", "FilterThicknessMinimum"],
    "7054": ["DS", "FilterThicknessMaximum"],
    "7056": ["FL", "FilterBeamPathLengthMinimum"],
    "7058": ["FL", "FilterBeamPathLengthMaximum"],
    "7060": ["CS", "ExposureControlMode"],
    "7062": ["LT", "ExposureControlModeDescription"],
    "7064": ["CS", "ExposureStatus"],
    "7065": ["DS", "PhototimerSetting"],
    "8150": ["DS", "ExposureTimeInuS"],
    "8151": ["DS", "XRayTubeCurrentInuA"],
    "9004": ["CS", "ContentQualification"],
    "9005": ["SH", "PulseSequenceName"],
    "9006": ["SQ", "MRImagingModifierSequence"],
    "9008": ["CS", "EchoPulseSequence"],
    "9009": ["CS", "InversionRecovery"],
    "9010": ["CS", "FlowCompensation"],
    "9011": ["CS", "MultipleSpinEcho"],
    "9012": ["CS", "MultiPlanarExcitation"],
    "9014": ["CS", "PhaseContrast"],
    "9015": ["CS", "TimeOfFlightContrast"],
    "9016": ["CS", "Spoiling"],
    "9017": ["CS", "SteadyStatePulseSequence"],
    "9018": ["CS", "EchoPlanarPulseSequence"],
    "9019": ["FD", "TagAngleFirstAxis"],
    "9020": ["CS", "MagnetizationTransfer"],
    "9021": ["CS", "T2Preparation"],
    "9022": ["CS", "BloodSignalNulling"],
    "9024": ["CS", "SaturationRecovery"],
    "9025": ["CS", "SpectrallySelectedSuppression"],
    "9026": ["CS", "SpectrallySelectedExcitation"],
    "9027": ["CS", "SpatialPresaturation"],
    "9028": ["CS", "Tagging"],
    "9029": ["CS", "OversamplingPhase"],
    "9030": ["FD", "TagSpacingFirstDimension"],
    "9032": ["CS", "GeometryOfKSpaceTraversal"],
    "9033": ["CS", "SegmentedKSpaceTraversal"],
    "9034": ["CS", "RectilinearPhaseEncodeReordering"],
    "9035": ["FD", "TagThickness"],
    "9036": ["CS", "PartialFourierDirection"],
    "9037": ["CS", "CardiacSynchronizationTechnique"],
    "9041": ["LO", "ReceiveCoilManufacturerName"],
    "9042": ["SQ", "MRReceiveCoilSequence"],
    "9043": ["CS", "ReceiveCoilType"],
    "9044": ["CS", "QuadratureReceiveCoil"],
    "9045": ["SQ", "MultiCoilDefinitionSequence"],
    "9046": ["LO", "MultiCoilConfiguration"],
    "9047": ["SH", "MultiCoilElementName"],
    "9048": ["CS", "MultiCoilElementUsed"],
    "9049": ["SQ", "MRTransmitCoilSequence"],
    "9050": ["LO", "TransmitCoilManufacturerName"],
    "9051": ["CS", "TransmitCoilType"],
    "9052": ["FD", "SpectralWidth"],
    "9053": ["FD", "ChemicalShiftReference"],
    "9054": ["CS", "VolumeLocalizationTechnique"],
    "9058": ["US", "MRAcquisitionFrequencyEncodingSteps"],
    "9059": ["CS", "Decoupling"],
    "9060": ["CS", "DecoupledNucleus"],
    "9061": ["FD", "DecouplingFrequency"],
    "9062": ["CS", "DecouplingMethod"],
    "9063": ["FD", "DecouplingChemicalShiftReference"],
    "9064": ["CS", "KSpaceFiltering"],
    "9065": ["CS", "TimeDomainFiltering"],
    "9066": ["US", "NumberOfZeroFills"],
    "9067": ["CS", "BaselineCorrection"],
    "9069": ["FD", "ParallelReductionFactorInPlane"],
    "9070": ["FD", "CardiacRRIntervalSpecified"],
    "9073": ["FD", "AcquisitionDuration"],
    "9074": ["DT", "FrameAcquisitionDateTime"],
    "9075": ["CS", "DiffusionDirectionality"],
    "9076": ["SQ", "DiffusionGradientDirectionSequence"],
    "9077": ["CS", "ParallelAcquisition"],
    "9078": ["CS", "ParallelAcquisitionTechnique"],
    "9079": ["FD", "InversionTimes"],
    "9080": ["ST", "MetaboliteMapDescription"],
    "9081": ["CS", "PartialFourier"],
    "9082": ["FD", "EffectiveEchoTime"],
    "9083": ["SQ", "MetaboliteMapCodeSequence"],
    "9084": ["SQ", "ChemicalShiftSequence"],
    "9085": ["CS", "CardiacSignalSource"],
    "9087": ["FD", "DiffusionBValue"],
    "9089": ["FD", "DiffusionGradientOrientation"],
    "9090": ["FD", "VelocityEncodingDirection"],
    "9091": ["FD", "VelocityEncodingMinimumValue"],
    "9092": ["SQ", "VelocityEncodingAcquisitionSequence"],
    "9093": ["US", "NumberOfKSpaceTrajectories"],
    "9094": ["CS", "CoverageOfKSpace"],
    "9095": ["UL", "SpectroscopyAcquisitionPhaseRows"],
    "9096": ["FD", "ParallelReductionFactorInPlaneRetired"],
    "9098": ["FD", "TransmitterFrequency"],
    "9100": ["CS", "ResonantNucleus"],
    "9101": ["CS", "FrequencyCorrection"],
    "9103": ["SQ", "MRSpectroscopyFOVGeometrySequence"],
    "9104": ["FD", "SlabThickness"],
    "9105": ["FD", "SlabOrientation"],
    "9106": ["FD", "MidSlabPosition"],
    "9107": ["SQ", "MRSpatialSaturationSequence"],
    "9112": ["SQ", "MRTimingAndRelatedParametersSequence"],
    "9114": ["SQ", "MREchoSequence"],
    "9115": ["SQ", "MRModifierSequence"],
    "9117": ["SQ", "MRDiffusionSequence"],
    "9118": ["SQ", "CardiacSynchronizationSequence"],
    "9119": ["SQ", "MRAveragesSequence"],
    "9125": ["SQ", "MRFOVGeometrySequence"],
    "9126": ["SQ", "VolumeLocalizationSequence"],
    "9127": ["UL", "SpectroscopyAcquisitionDataColumns"],
    "9147": ["CS", "DiffusionAnisotropyType"],
    "9151": ["DT", "FrameReferenceDateTime"],
    "9152": ["SQ", "MRMetaboliteMapSequence"],
    "9155": ["FD", "ParallelReductionFactorOutOfPlane"],
    "9159": ["UL", "SpectroscopyAcquisitionOutOfPlanePhaseSteps"],
    "9166": ["CS", "BulkMotionStatus"],
    "9168": ["FD", "ParallelReductionFactorSecondInPlane"],
    "9169": ["CS", "CardiacBeatRejectionTechnique"],
    "9170": ["CS", "RespiratoryMotionCompensationTechnique"],
    "9171": ["CS", "RespiratorySignalSource"],
    "9172": ["CS", "BulkMotionCompensationTechnique"],
    "9173": ["CS", "BulkMotionSignalSource"],
    "9174": ["CS", "ApplicableSafetyStandardAgency"],
    "9175": ["LO", "ApplicableSafetyStandardDescription"],
    "9176": ["SQ", "OperatingModeSequence"],
    "9177": ["CS", "OperatingModeType"],
    "9178": ["CS", "OperatingMode"],
    "9179": ["CS", "SpecificAbsorptionRateDefinition"],
    "9180": ["CS", "GradientOutputType"],
    "9181": ["FD", "SpecificAbsorptionRateValue"],
    "9182": ["FD", "GradientOutput"],
    "9183": ["CS", "FlowCompensationDirection"],
    "9184": ["FD", "TaggingDelay"],
    "9185": ["ST", "RespiratoryMotionCompensationTechniqueDescription"],
    "9186": ["SH", "RespiratorySignalSourceID"],
    "9195": ["FD", "ChemicalShiftMinimumIntegrationLimitInHz"],
    "9196": ["FD", "ChemicalShiftMaximumIntegrationLimitInHz"],
    "9197": ["SQ", "MRVelocityEncodingSequence"],
    "9198": ["CS", "FirstOrderPhaseCorrection"],
    "9199": ["CS", "WaterReferencedPhaseCorrection"],
    "9200": ["CS", "MRSpectroscopyAcquisitionType"],
    "9214": ["CS", "RespiratoryCyclePosition"],
    "9217": ["FD", "VelocityEncodingMaximumValue"],
    "9218": ["FD", "TagSpacingSecondDimension"],
    "9219": ["SS", "TagAngleSecondAxis"],
    "9220": ["FD", "FrameAcquisitionDuration"],
    "9226": ["SQ", "MRImageFrameTypeSequence"],
    "9227": ["SQ", "MRSpectroscopyFrameTypeSequence"],
    "9231": ["US", "MRAcquisitionPhaseEncodingStepsInPlane"],
    "9232": ["US", "MRAcquisitionPhaseEncodingStepsOutOfPlane"],
    "9234": ["UL", "SpectroscopyAcquisitionPhaseColumns"],
    "9236": ["CS", "CardiacCyclePosition"],
    "9239": ["SQ", "SpecificAbsorptionRateSequence"],
    "9240": ["US", "RFEchoTrainLength"],
    "9241": ["US", "GradientEchoTrainLength"],
    "9250": ["CS", "ArterialSpinLabelingContrast"],
    "9251": ["SQ", "MRArterialSpinLabelingSequence"],
    "9252": ["LO", "ASLTechniqueDescription"],
    "9253": ["US", "ASLSlabNumber"],
    "9254": ["FD ", "ASLSlabThickness"],
    "9255": ["FD ", "ASLSlabOrientation"],
    "9256": ["FD ", "ASLMidSlabPosition"],
    "9257": ["CS", "ASLContext"],
    "9258": ["UL", "ASLPulseTrainDuration"],
    "9259": ["CS", "ASLCrusherFlag"],
    "925A": ["FD", "ASLCrusherFlow"],
    "925B": ["LO", "ASLCrusherDescription"],
    "925C": ["CS", "ASLBolusCutoffFlag"],
    "925D": ["SQ", "ASLBolusCutoffTimingSequence"],
    "925E": ["LO", "ASLBolusCutoffTechnique"],
    "925F": ["UL", "ASLBolusCutoffDelayTime"],
    "9260": ["SQ", "ASLSlabSequence"],
    "9295": ["FD", "ChemicalShiftMinimumIntegrationLimitInppm"],
    "9296": ["FD", "ChemicalShiftMaximumIntegrationLimitInppm"],
    "9301": ["SQ", "CTAcquisitionTypeSequence"],
    "9302": ["CS", "AcquisitionType"],
    "9303": ["FD", "TubeAngle"],
    "9304": ["SQ", "CTAcquisitionDetailsSequence"],
    "9305": ["FD", "RevolutionTime"],
    "9306": ["FD", "SingleCollimationWidth"],
    "9307": ["FD", "TotalCollimationWidth"],
    "9308": ["SQ", "CTTableDynamicsSequence"],
    "9309": ["FD", "TableSpeed"],
    "9310": ["FD", "TableFeedPerRotation"],
    "9311": ["FD", "SpiralPitchFactor"],
    "9312": ["SQ", "CTGeometrySequence"],
    "9313": ["FD", "DataCollectionCenterPatient"],
    "9314": ["SQ", "CTReconstructionSequence"],
    "9315": ["CS", "ReconstructionAlgorithm"],
    "9316": ["CS", "ConvolutionKernelGroup"],
    "9317": ["FD", "ReconstructionFieldOfView"],
    "9318": ["FD", "ReconstructionTargetCenterPatient"],
    "9319": ["FD", "ReconstructionAngle"],
    "9320": ["SH", "ImageFilter"],
    "9321": ["SQ", "CTExposureSequence"],
    "9322": ["FD", "ReconstructionPixelSpacing"],
    "9323": ["CS", "ExposureModulationType"],
    "9324": ["FD", "EstimatedDoseSaving"],
    "9325": ["SQ", "CTXRayDetailsSequence"],
    "9326": ["SQ", "CTPositionSequence"],
    "9327": ["FD", "TablePosition"],
    "9328": ["FD", "ExposureTimeInms"],
    "9329": ["SQ", "CTImageFrameTypeSequence"],
    "9330": ["FD", "XRayTubeCurrentInmA"],
    "9332": ["FD", "ExposureInmAs"],
    "9333": ["CS", "ConstantVolumeFlag"],
    "9334": ["CS", "FluoroscopyFlag"],
    "9335": ["FD", "DistanceSourceToDataCollectionCenter"],
    "9337": ["US", "ContrastBolusAgentNumber"],
    "9338": ["SQ", "ContrastBolusIngredientCodeSequence"],
    "9340": ["SQ", "ContrastAdministrationProfileSequence"],
    "9341": ["SQ", "ContrastBolusUsageSequence"],
    "9342": ["CS", "ContrastBolusAgentAdministered"],
    "9343": ["CS", "ContrastBolusAgentDetected"],
    "9344": ["CS", "ContrastBolusAgentPhase"],
    "9345": ["FD", "CTDIvol"],
    "9346": ["SQ", "CTDIPhantomTypeCodeSequence"],
    "9351": ["FL", "CalciumScoringMassFactorPatient"],
    "9352": ["FL", "CalciumScoringMassFactorDevice"],
    "9353": ["FL", "EnergyWeightingFactor"],
    "9360": ["SQ", "CTAdditionalXRaySourceSequence"],
    "9401": ["SQ", "ProjectionPixelCalibrationSequence"],
    "9402": ["FL", "DistanceSourceToIsocenter"],
    "9403": ["FL", "DistanceObjectToTableTop"],
    "9404": ["FL", "ObjectPixelSpacingInCenterOfBeam"],
    "9405": ["SQ", "PositionerPositionSequence"],
    "9406": ["SQ", "TablePositionSequence"],
    "9407": ["SQ", "CollimatorShapeSequence"],
    "9410": ["CS", "PlanesInAcquisition"],
    "9412": ["SQ", "XAXRFFrameCharacteristicsSequence"],
    "9417": ["SQ", "FrameAcquisitionSequence"],
    "9420": ["CS", "XRayReceptorType"],
    "9423": ["LO", "AcquisitionProtocolName"],
    "9424": ["LT", "AcquisitionProtocolDescription"],
    "9425": ["CS", "ContrastBolusIngredientOpaque"],
    "9426": ["FL", "DistanceReceptorPlaneToDetectorHousing"],
    "9427": ["CS", "IntensifierActiveShape"],
    "9428": ["FL", "IntensifierActiveDimensions"],
    "9429": ["FL", "PhysicalDetectorSize"],
    "9430": ["FL", "PositionOfIsocenterProjection"],
    "9432": ["SQ", "FieldOfViewSequence"],
    "9433": ["LO", "FieldOfViewDescription"],
    "9434": ["SQ", "ExposureControlSensingRegionsSequence"],
    "9435": ["CS", "ExposureControlSensingRegionShape"],
    "9436": ["SS", "ExposureControlSensingRegionLeftVerticalEdge"],
    "9437": ["SS", "ExposureControlSensingRegionRightVerticalEdge"],
    "9438": ["SS", "ExposureControlSensingRegionUpperHorizontalEdge"],
    "9439": ["SS", "ExposureControlSensingRegionLowerHorizontalEdge"],
    "9440": ["SS", "CenterOfCircularExposureControlSensingRegion"],
    "9441": ["US", "RadiusOfCircularExposureControlSensingRegion"],
    "9442": ["SS", "VerticesOfThePolygonalExposureControlSensingRegion"],
    "9447": ["FL", "ColumnAngulationPatient"],
    "9449": ["FL", "BeamAngle"],
    "9451": ["SQ", "FrameDetectorParametersSequence"],
    "9452": ["FL", "CalculatedAnatomyThickness"],
    "9455": ["SQ", "CalibrationSequence"],
    "9456": ["SQ", "ObjectThicknessSequence"],
    "9457": ["CS", "PlaneIdentification"],
    "9461": ["FL", "FieldOfViewDimensionsInFloat"],
    "9462": ["SQ", "IsocenterReferenceSystemSequence"],
    "9463": ["FL", "PositionerIsocenterPrimaryAngle"],
    "9464": ["FL", "PositionerIsocenterSecondaryAngle"],
    "9465": ["FL", "PositionerIsocenterDetectorRotationAngle"],
    "9466": ["FL", "TableXPositionToIsocenter"],
    "9467": ["FL", "TableYPositionToIsocenter"],
    "9468": ["FL", "TableZPositionToIsocenter"],
    "9469": ["FL", "TableHorizontalRotationAngle"],
    "9470": ["FL", "TableHeadTiltAngle"],
    "9471": ["FL", "TableCradleTiltAngle"],
    "9472": ["SQ", "FrameDisplayShutterSequence"],
    "9473": ["FL", "AcquiredImageAreaDoseProduct"],
    "9474": ["CS", "CArmPositionerTabletopRelationship"],
    "9476": ["SQ", "XRayGeometrySequence"],
    "9477": ["SQ", "IrradiationEventIdentificationSequence"],
    "9504": ["SQ", "XRay3DFrameTypeSequence"],
    "9506": ["SQ", "ContributingSourcesSequence"],
    "9507": ["SQ", "XRay3DAcquisitionSequence"],
    "9508": ["FL", "PrimaryPositionerScanArc"],
    "9509": ["FL", "SecondaryPositionerScanArc"],
    "9510": ["FL", "PrimaryPositionerScanStartAngle"],
    "9511": ["FL", "SecondaryPositionerScanStartAngle"],
    "9514": ["FL", "PrimaryPositionerIncrement"],
    "9515": ["FL", "SecondaryPositionerIncrement"],
    "9516": ["DT", "StartAcquisitionDateTime"],
    "9517": ["DT", "EndAcquisitionDateTime"],
    "9524": ["LO", "ApplicationName"],
    "9525": ["LO", "ApplicationVersion"],
    "9526": ["LO", "ApplicationManufacturer"],
    "9527": ["CS", "AlgorithmType"],
    "9528": ["LO", "AlgorithmDescription"],
    "9530": ["SQ", "XRay3DReconstructionSequence"],
    "9531": ["LO", "ReconstructionDescription"],
    "9538": ["SQ", "PerProjectionAcquisitionSequence"],
    "9601": ["SQ", "DiffusionBMatrixSequence"],
    "9602": ["FD", "DiffusionBValueXX"],
    "9603": ["FD", "DiffusionBValueXY"],
    "9604": ["FD", "DiffusionBValueXZ"],
    "9605": ["FD", "DiffusionBValueYY"],
    "9606": ["FD", "DiffusionBValueYZ"],
    "9607": ["FD", "DiffusionBValueZZ"],
    "9701": ["DT", "DecayCorrectionDateTime"],
    "9715": ["FD", "StartDensityThreshold"],
    "9716": ["FD", "StartRelativeDensityDifferenceThreshold"],
    "9717": ["FD", "StartCardiacTriggerCountThreshold"],
    "9718": ["FD", "StartRespiratoryTriggerCountThreshold"],
    "9719": ["FD", "TerminationCountsThreshold"],
    "9720": ["FD", "TerminationDensityThreshold"],
    "9721": ["FD", "TerminationRelativeDensityThreshold"],
    "9722": ["FD", "TerminationTimeThreshold"],
    "9723": ["FD", "TerminationCardiacTriggerCountThreshold"],
    "9724": ["FD", "TerminationRespiratoryTriggerCountThreshold"],
    "9725": ["CS", "DetectorGeometry"],
    "9726": ["FD", "TransverseDetectorSeparation"],
    "9727": ["FD", "AxialDetectorDimension"],
    "9729": ["US", "RadiopharmaceuticalAgentNumber"],
    "9732": ["SQ", "PETFrameAcquisitionSequence"],
    "9733": ["SQ", "PETDetectorMotionDetailsSequence"],
    "9734": ["SQ", "PETTableDynamicsSequence"],
    "9735": ["SQ", "PETPositionSequence"],
    "9736": ["SQ", "PETFrameCorrectionFactorsSequence"],
    "9737": ["SQ", "RadiopharmaceuticalUsageSequence"],
    "9738": ["CS", "AttenuationCorrectionSource"],
    "9739": ["US", "NumberOfIterations"],
    "9740": ["US", "NumberOfSubsets"],
    "9749": ["SQ", "PETReconstructionSequence"],
    "9751": ["SQ", "PETFrameTypeSequence"],
    "9755": ["CS", "TimeOfFlightInformationUsed"],
    "9756": ["CS", "ReconstructionType"],
    "9758": ["CS", "DecayCorrected"],
    "9759": ["CS", "AttenuationCorrected"],
    "9760": ["CS", "ScatterCorrected"],
    "9761": ["CS", "DeadTimeCorrected"],
    "9762": ["CS", "GantryMotionCorrected"],
    "9763": ["CS", "PatientMotionCorrected"],
    "9764": ["CS", "CountLossNormalizationCorrected"],
    "9765": ["CS", "RandomsCorrected"],
    "9766": ["CS", "NonUniformRadialSamplingCorrected"],
    "9767": ["CS", "SensitivityCalibrated"],
    "9768": ["CS", "DetectorNormalizationCorrection"],
    "9769": ["CS", "IterativeReconstructionMethod"],
    "9770": ["CS", "AttenuationCorrectionTemporalRelationship"],
    "9771": ["SQ", "PatientPhysiologicalStateSequence"],
    "9772": ["SQ", "PatientPhysiologicalStateCodeSequence"],
    "9801": ["FD", "DepthsOfFocus"],
    "9803": ["SQ", "ExcludedIntervalsSequence"],
    "9804": ["DT", "ExclusionStartDatetime"],
    "9805": ["FD", "ExclusionDuration"],
    "9806": ["SQ", "USImageDescriptionSequence"],
    "9807": ["SQ", "ImageDataTypeSequence"],
    "9808": ["CS", "DataType"],
    "9809": ["SQ", "TransducerScanPatternCodeSequence"],
    "980B": ["CS", "AliasedDataType"],
    "980C": ["CS", "PositionMeasuringDeviceUsed"],
    "980D": ["SQ", "TransducerGeometryCodeSequence"],
    "980E": ["SQ", "TransducerBeamSteeringCodeSequence"],
    "980F": ["SQ", "TransducerApplicationCodeSequence"],
    "A001": ["SQ", "ContributingEquipmentSequence"],
    "A002": ["DT", "ContributionDateTime"],
    "A003": ["ST", "ContributionDescription"]
  },
  "0020": {
    "000D": ["UI", "StudyInstanceUID"],
    "000E": ["UI", "SeriesInstanceUID"],
    "0010": ["SH", "StudyID"],
    "0011": ["IS", "SeriesNumber"],
    "0012": ["IS", "AcquisitionNumber"],
    "0013": ["IS", "InstanceNumber"],
    "0014": ["IS", "IsotopeNumber"],
    "0015": ["IS", "PhaseNumber"],
    "0016": ["IS", "IntervalNumber"],
    "0017": ["IS", "TimeSlotNumber"],
    "0018": ["IS", "AngleNumber"],
    "0019": ["IS", "ItemNumber"],
    "0020": ["CS", "PatientOrientation"],
    "0022": ["IS", "OverlayNumber"],
    "0024": ["IS", "CurveNumber"],
    "0026": ["IS", "LUTNumber"],
    "0030": ["DS", "ImagePosition"],
    "0032": ["DS", "ImagePositionPatient"],
    "0035": ["DS", "ImageOrientation"],
    "0037": ["DS", "ImageOrientationPatient"],
    "0050": ["DS", "Location"],
    "0052": ["UI", "FrameOfReferenceUID"],
    "0060": ["CS", "Laterality"],
    "0062": ["CS", "ImageLaterality"],
    "0070": ["LO", "ImageGeometryType"],
    "0080": ["CS", "MaskingImage"],
    "00AA": ["IS", "ReportNumber"],
    "0100": ["IS", "TemporalPositionIdentifier"],
    "0105": ["IS", "NumberOfTemporalPositions"],
    "0110": ["DS", "TemporalResolution"],
    "0200": ["UI", "SynchronizationFrameOfReferenceUID"],
    "0242": ["UI", "SOPInstanceUIDOfConcatenationSource"],
    "1000": ["IS", "SeriesInStudy"],
    "1001": ["IS", "AcquisitionsInSeries"],
    "1002": ["IS", "ImagesInAcquisition"],
    "1003": ["IS", "ImagesInSeries"],
    "1004": ["IS", "AcquisitionsInStudy"],
    "1005": ["IS", "ImagesInStudy"],
    "1020": ["LO", "Reference"],
    "1040": ["LO", "PositionReferenceIndicator"],
    "1041": ["DS", "SliceLocation"],
    "1070": ["IS", "OtherStudyNumbers"],
    "1200": ["IS", "NumberOfPatientRelatedStudies"],
    "1202": ["IS", "NumberOfPatientRelatedSeries"],
    "1204": ["IS", "NumberOfPatientRelatedInstances"],
    "1206": ["IS", "NumberOfStudyRelatedSeries"],
    "1208": ["IS", "NumberOfStudyRelatedInstances"],
    "1209": ["IS", "NumberOfSeriesRelatedInstances"],
    "3401": ["CS", "ModifyingDeviceID"],
    "3402": ["CS", "ModifiedImageID"],
    "3403": ["DA", "ModifiedImageDate"],
    "3404": ["LO", "ModifyingDeviceManufacturer"],
    "3405": ["TM", "ModifiedImageTime"],
    "3406": ["LO", "ModifiedImageDescription"],
    "4000": ["LT", "ImageComments"],
    "5000": ["AT", "OriginalImageIdentification"],
    "5002": ["LO", "OriginalImageIdentificationNomenclature"],
    "9056": ["SH", "StackID"],
    "9057": ["UL", "InStackPositionNumber"],
    "9071": ["SQ", "FrameAnatomySequence"],
    "9072": ["CS", "FrameLaterality"],
    "9111": ["SQ", "FrameContentSequence"],
    "9113": ["SQ", "PlanePositionSequence"],
    "9116": ["SQ", "PlaneOrientationSequence"],
    "9128": ["UL", "TemporalPositionIndex"],
    "9153": ["FD", "NominalCardiacTriggerDelayTime"],
    "9154": ["FL", "NominalCardiacTriggerTimePriorToRPeak"],
    "9155": ["FL", "ActualCardiacTriggerTimePriorToRPeak"],
    "9156": ["US", "FrameAcquisitionNumber"],
    "9157": ["UL", "DimensionIndexValues"],
    "9158": ["LT", "FrameComments"],
    "9161": ["UI", "ConcatenationUID"],
    "9162": ["US", "InConcatenationNumber"],
    "9163": ["US", "InConcatenationTotalNumber"],
    "9164": ["UI", "DimensionOrganizationUID"],
    "9165": ["AT", "DimensionIndexPointer"],
    "9167": ["AT", "FunctionalGroupPointer"],
    "9213": ["LO", "DimensionIndexPrivateCreator"],
    "9221": ["SQ", "DimensionOrganizationSequence"],
    "9222": ["SQ", "DimensionIndexSequence"],
    "9228": ["UL", "ConcatenationFrameOffsetNumber"],
    "9238": ["LO", "FunctionalGroupPrivateCreator"],
    "9241": ["FL", "NominalPercentageOfCardiacPhase"],
    "9245": ["FL", "NominalPercentageOfRespiratoryPhase"],
    "9246": ["FL", "StartingRespiratoryAmplitude"],
    "9247": ["CS", "StartingRespiratoryPhase"],
    "9248": ["FL", "EndingRespiratoryAmplitude"],
    "9249": ["CS", "EndingRespiratoryPhase"],
    "9250": ["CS", "RespiratoryTriggerType"],
    "9251": ["FD", "RRIntervalTimeNominal"],
    "9252": ["FD", "ActualCardiacTriggerDelayTime"],
    "9253": ["SQ", "RespiratorySynchronizationSequence"],
    "9254": ["FD", "RespiratoryIntervalTime"],
    "9255": ["FD", "NominalRespiratoryTriggerDelayTime"],
    "9256": ["FD", "RespiratoryTriggerDelayThreshold"],
    "9257": ["FD", "ActualRespiratoryTriggerDelayTime"],
    "9301": ["FD", "ImagePositionVolume"],
    "9302": ["FD", "ImageOrientationVolume"],
    "9307": ["CS", "UltrasoundAcquisitionGeometry"],
    "9308": ["FD", "ApexPosition"],
    "9309": ["FD", "VolumeToTransducerMappingMatrix"],
    "930A": ["FD", "VolumeToTableMappingMatrix"],
    "930C": ["CS", "PatientFrameOfReferenceSource"],
    "930D": ["FD", "TemporalPositionTimeOffset"],
    "930E": ["SQ", "PlanePositionVolumeSequence"],
    "930F": ["SQ", "PlaneOrientationVolumeSequence"],
    "9310": ["SQ", "TemporalPositionSequence"],
    "9311": ["CS", "DimensionOrganizationType"],
    "9312": ["UI", "VolumeFrameOfReferenceUID"],
    "9313": ["UI", "TableFrameOfReferenceUID"],
    "9421": ["LO", "DimensionDescriptionLabel"],
    "9450": ["SQ", "PatientOrientationInFrameSequence"],
    "9453": ["LO", "FrameLabel"],
    "9518": ["US", "AcquisitionIndex"],
    "9529": ["SQ", "ContributingSOPInstancesReferenceSequence"],
    "9536": ["US", "ReconstructionIndex"]
  },
  "0022": {
    "0001": ["US", "LightPathFilterPassThroughWavelength"],
    "0002": ["US", "LightPathFilterPassBand"],
    "0003": ["US", "ImagePathFilterPassThroughWavelength"],
    "0004": ["US", "ImagePathFilterPassBand"],
    "0005": ["CS", "PatientEyeMovementCommanded"],
    "0006": ["SQ", "PatientEyeMovementCommandCodeSequence"],
    "0007": ["FL", "SphericalLensPower"],
    "0008": ["FL", "CylinderLensPower"],
    "0009": ["FL", "CylinderAxis"],
    "000A": ["FL", "EmmetropicMagnification"],
    "000B": ["FL", "IntraOcularPressure"],
    "000C": ["FL", "HorizontalFieldOfView"],
    "000D": ["CS", "PupilDilated"],
    "000E": ["FL", "DegreeOfDilation"],
    "0010": ["FL", "StereoBaselineAngle"],
    "0011": ["FL", "StereoBaselineDisplacement"],
    "0012": ["FL", "StereoHorizontalPixelOffset"],
    "0013": ["FL", "StereoVerticalPixelOffset"],
    "0014": ["FL", "StereoRotation"],
    "0015": ["SQ", "AcquisitionDeviceTypeCodeSequence"],
    "0016": ["SQ", "IlluminationTypeCodeSequence"],
    "0017": ["SQ", "LightPathFilterTypeStackCodeSequence"],
    "0018": ["SQ", "ImagePathFilterTypeStackCodeSequence"],
    "0019": ["SQ", "LensesCodeSequence"],
    "001A": ["SQ", "ChannelDescriptionCodeSequence"],
    "001B": ["SQ", "RefractiveStateSequence"],
    "001C": ["SQ", "MydriaticAgentCodeSequence"],
    "001D": ["SQ", "RelativeImagePositionCodeSequence"],
    "001E": ["FL", "CameraAngleOfView"],
    "0020": ["SQ", "StereoPairsSequence"],
    "0021": ["SQ", "LeftImageSequence"],
    "0022": ["SQ", "RightImageSequence"],
    "0030": ["FL", "AxialLengthOfTheEye"],
    "0031": ["SQ", "OphthalmicFrameLocationSequence"],
    "0032": ["FL", "ReferenceCoordinates"],
    "0035": ["FL", "DepthSpatialResolution"],
    "0036": ["FL", "MaximumDepthDistortion"],
    "0037": ["FL", "AlongScanSpatialResolution"],
    "0038": ["FL", "MaximumAlongScanDistortion"],
    "0039": ["CS", "OphthalmicImageOrientation"],
    "0041": ["FL", "DepthOfTransverseImage"],
    "0042": ["SQ", "MydriaticAgentConcentrationUnitsSequence"],
    "0048": ["FL", "AcrossScanSpatialResolution"],
    "0049": ["FL", "MaximumAcrossScanDistortion"],
    "004E": ["DS", "MydriaticAgentConcentration"],
    "0055": ["FL", "IlluminationWaveLength"],
    "0056": ["FL", "IlluminationPower"],
    "0057": ["FL", "IlluminationBandwidth"],
    "0058": ["SQ", "MydriaticAgentSequence"],
    "1007": ["SQ", "OphthalmicAxialMeasurementsRightEyeSequence"],
    "1008": ["SQ", "OphthalmicAxialMeasurementsLeftEyeSequence"],
    "1010": ["CS", "OphthalmicAxialLengthMeasurementsType"],
    "1019": ["FL", "OphthalmicAxialLength"],
    "1024": ["SQ", "LensStatusCodeSequence"],
    "1025": ["SQ", "VitreousStatusCodeSequence"],
    "1028": ["SQ", "IOLFormulaCodeSequence"],
    "1029": ["LO", "IOLFormulaDetail"],
    "1033": ["FL", "KeratometerIndex"],
    "1035": ["SQ", "SourceOfOphthalmicAxialLengthCodeSequence"],
    "1037": ["FL", "TargetRefraction"],
    "1039": ["CS", "RefractiveProcedureOccurred"],
    "1040": ["SQ", "RefractiveSurgeryTypeCodeSequence"],
    "1044": ["SQ", "OphthalmicUltrasoundAxialMeasurementsTypeCodeSequence"],
    "1050": ["SQ", "OphthalmicAxialLengthMeasurementsSequence"],
    "1053": ["FL", "IOLPower"],
    "1054": ["FL", "PredictedRefractiveError"],
    "1059": ["FL", "OphthalmicAxialLengthVelocity"],
    "1065": ["LO", "LensStatusDescription"],
    "1066": ["LO", "VitreousStatusDescription"],
    "1090": ["SQ", "IOLPowerSequence"],
    "1092": ["SQ", "LensConstantSequence"],
    "1093": ["LO", "IOLManufacturer"],
    "1094": ["LO", "LensConstantDescription"],
    "1096": ["SQ", "KeratometryMeasurementTypeCodeSequence"],
    "1100": ["SQ", "ReferencedOphthalmicAxialMeasurementsSequence"],
    "1101": ["SQ", "OphthalmicAxialLengthMeasurementsSegmentNameCodeSequence"],
    "1103": ["SQ", "RefractiveErrorBeforeRefractiveSurgeryCodeSequence"],
    "1121": ["FL", "IOLPowerForExactEmmetropia"],
    "1122": ["FL", "IOLPowerForExactTargetRefraction"],
    "1125": ["SQ", "AnteriorChamberDepthDefinitionCodeSequence"],
    "1130": ["FL", "LensThickness"],
    "1131": ["FL", "AnteriorChamberDepth"],
    "1132": ["SQ", "SourceOfLensThicknessDataCodeSequence"],
    "1133": ["SQ", "SourceOfAnteriorChamberDepthDataCodeSequence"],
    "1135": ["SQ", "SourceOfRefractiveErrorDataCodeSequence"],
    "1140": ["CS", "OphthalmicAxialLengthMeasurementModified"],
    "1150": ["SQ", "OphthalmicAxialLengthDataSourceCodeSequence"],
    "1153": ["SQ", "OphthalmicAxialLengthAcquisitionMethodCodeSequence"],
    "1155": ["FL", "SignalToNoiseRatio"],
    "1159": ["LO", "OphthalmicAxialLengthDataSourceDescription"],
    "1210": ["SQ", "OphthalmicAxialLengthMeasurementsTotalLengthSequence"],
    "1211": ["SQ", "OphthalmicAxialLengthMeasurementsSegmentalLengthSequence"],
    "1212": ["SQ", "OphthalmicAxialLengthMeasurementsLengthSummationSequence"],
    "1220": ["SQ", "UltrasoundOphthalmicAxialLengthMeasurementsSequence"],
    "1225": ["SQ", "OpticalOphthalmicAxialLengthMeasurementsSequence"],
    "1230": ["SQ", "UltrasoundSelectedOphthalmicAxialLengthSequence"],
    "1250": ["SQ", "OphthalmicAxialLengthSelectionMethodCodeSequence"],
    "1255": ["SQ", "OpticalSelectedOphthalmicAxialLengthSequence"],
    "1257": ["SQ", "SelectedSegmentalOphthalmicAxialLengthSequence"],
    "1260": ["SQ", "SelectedTotalOphthalmicAxialLengthSequence"],
    "1262": ["SQ", "OphthalmicAxialLengthQualityMetricSequence"],
    "1273": ["LO", "OphthalmicAxialLengthQualityMetricTypeDescription"],
    "1300": ["SQ", "IntraocularLensCalculationsRightEyeSequence"],
    "1310": ["SQ", "IntraocularLensCalculationsLeftEyeSequence"],
    "1330": ["SQ", "ReferencedOphthalmicAxialLengthMeasurementQCImageSequence"]
  },
  "0024": {
    "0010": ["FL", "VisualFieldHorizontalExtent"],
    "0011": ["FL", "VisualFieldVerticalExtent"],
    "0012": ["CS", "VisualFieldShape"],
    "0016": ["SQ", "ScreeningTestModeCodeSequence"],
    "0018": ["FL", "MaximumStimulusLuminance"],
    "0020": ["FL", "BackgroundLuminance"],
    "0021": ["SQ", "StimulusColorCodeSequence"],
    "0024": ["SQ", "BackgroundIlluminationColorCodeSequence"],
    "0025": ["FL", "StimulusArea"],
    "0028": ["FL", "StimulusPresentationTime"],
    "0032": ["SQ", "FixationSequence"],
    "0033": ["SQ", "FixationMonitoringCodeSequence"],
    "0034": ["SQ", "VisualFieldCatchTrialSequence"],
    "0035": ["US", "FixationCheckedQuantity"],
    "0036": ["US", "PatientNotProperlyFixatedQuantity"],
    "0037": ["CS", "PresentedVisualStimuliDataFlag"],
    "0038": ["US", "NumberOfVisualStimuli"],
    "0039": ["CS", "ExcessiveFixationLossesDataFlag"],
    "0040": ["CS", "ExcessiveFixationLosses"],
    "0042": ["US", "StimuliRetestingQuantity"],
    "0044": ["LT", "CommentsOnPatientPerformanceOfVisualField"],
    "0045": ["CS", "FalseNegativesEstimateFlag"],
    "0046": ["FL", "FalseNegativesEstimate"],
    "0048": ["US", "NegativeCatchTrialsQuantity"],
    "0050": ["US", "FalseNegativesQuantity"],
    "0051": ["CS", "ExcessiveFalseNegativesDataFlag"],
    "0052": ["CS", "ExcessiveFalseNegatives"],
    "0053": ["CS", "FalsePositivesEstimateFlag"],
    "0054": ["FL", "FalsePositivesEstimate"],
    "0055": ["CS", "CatchTrialsDataFlag"],
    "0056": ["US", "PositiveCatchTrialsQuantity"],
    "0057": ["CS", "TestPointNormalsDataFlag"],
    "0058": ["SQ", "TestPointNormalsSequence"],
    "0059": ["CS", "GlobalDeviationProbabilityNormalsFlag"],
    "0060": ["US", "FalsePositivesQuantity"],
    "0061": ["CS", "ExcessiveFalsePositivesDataFlag"],
    "0062": ["CS", "ExcessiveFalsePositives"],
    "0063": ["CS", "VisualFieldTestNormalsFlag"],
    "0064": ["SQ", "ResultsNormalsSequence"],
    "0065": ["SQ", "AgeCorrectedSensitivityDeviationAlgorithmSequence"],
    "0066": ["FL", "GlobalDeviationFromNormal"],
    "0067": ["SQ", "GeneralizedDefectSensitivityDeviationAlgorithmSequence"],
    "0068": ["FL", "LocalizedDeviationfromNormal"],
    "0069": ["LO", "PatientReliabilityIndicator"],
    "0070": ["FL", "VisualFieldMeanSensitivity"],
    "0071": ["FL", "GlobalDeviationProbability"],
    "0072": ["CS", "LocalDeviationProbabilityNormalsFlag"],
    "0073": ["FL", "LocalizedDeviationProbability"],
    "0074": ["CS", "ShortTermFluctuationCalculated"],
    "0075": ["FL", "ShortTermFluctuation"],
    "0076": ["CS", "ShortTermFluctuationProbabilityCalculated"],
    "0077": ["FL", "ShortTermFluctuationProbability"],
    "0078": ["CS", "CorrectedLocalizedDeviationFromNormalCalculated"],
    "0079": ["FL", "CorrectedLocalizedDeviationFromNormal"],
    "0080": ["CS", "CorrectedLocalizedDeviationFromNormalProbabilityCalculated"],
    "0081": ["FL", "CorrectedLocalizedDeviationFromNormalProbability"],
    "0083": ["SQ", "GlobalDeviationProbabilitySequence"],
    "0085": ["SQ", "LocalizedDeviationProbabilitySequence"],
    "0086": ["CS", "FovealSensitivityMeasured"],
    "0087": ["FL", "FovealSensitivity"],
    "0088": ["FL", "VisualFieldTestDuration"],
    "0089": ["SQ", "VisualFieldTestPointSequence"],
    "0090": ["FL", "VisualFieldTestPointXCoordinate"],
    "0091": ["FL", "VisualFieldTestPointYCoordinate"],
    "0092": ["FL", "AgeCorrectedSensitivityDeviationValue"],
    "0093": ["CS", "StimulusResults"],
    "0094": ["FL", "SensitivityValue"],
    "0095": ["CS", "RetestStimulusSeen"],
    "0096": ["FL", "RetestSensitivityValue"],
    "0097": ["SQ", "VisualFieldTestPointNormalsSequence"],
    "0098": ["FL", "QuantifiedDefect"],
    "0100": ["FL", "AgeCorrectedSensitivityDeviationProbabilityValue"],
    "0102": ["CS", "GeneralizedDefectCorrectedSensitivityDeviationFlag "],
    "0103": ["FL", "GeneralizedDefectCorrectedSensitivityDeviationValue "],
    "0104": ["FL", "GeneralizedDefectCorrectedSensitivityDeviationProbabilityValue"],
    "0105": ["FL ", "MinimumSensitivityValue"],
    "0106": ["CS", "BlindSpotLocalized"],
    "0107": ["FL", "BlindSpotXCoordinate"],
    "0108": ["FL", "BlindSpotYCoordinate "],
    "0110": ["SQ", "VisualAcuityMeasurementSequence"],
    "0112": ["SQ", "RefractiveParametersUsedOnPatientSequence"],
    "0113": ["CS", "MeasurementLaterality"],
    "0114": ["SQ", "OphthalmicPatientClinicalInformationLeftEyeSequence"],
    "0115": ["SQ", "OphthalmicPatientClinicalInformationRightEyeSequence"],
    "0117": ["CS", "FovealPointNormativeDataFlag"],
    "0118": ["FL", "FovealPointProbabilityValue"],
    "0120": ["CS", "ScreeningBaselineMeasured"],
    "0122": ["SQ", "ScreeningBaselineMeasuredSequence"],
    "0124": ["CS", "ScreeningBaselineType"],
    "0126": ["FL", "ScreeningBaselineValue"],
    "0202": ["LO", "AlgorithmSource"],
    "0306": ["LO", "DataSetName"],
    "0307": ["LO", "DataSetVersion"],
    "0308": ["LO", "DataSetSource"],
    "0309": ["LO", "DataSetDescription"],
    "0317": ["SQ", "VisualFieldTestReliabilityGlobalIndexSequence"],
    "0320": ["SQ", "VisualFieldGlobalResultsIndexSequence"],
    "0325": ["SQ", "DataObservationSequence"],
    "0338": ["CS", "IndexNormalsFlag"],
    "0341": ["FL", "IndexProbability"],
    "0344": ["SQ", "IndexProbabilitySequence"]
  },
  "0028": {
    "0002": ["US", "SamplesPerPixel"],
    "0003": ["US", "SamplesPerPixelUsed"],
    "0004": ["CS", "PhotometricInterpretation"],
    "0005": ["US", "ImageDimensions"],
    "0006": ["US", "PlanarConfiguration"],
    "0008": ["IS", "NumberOfFrames"],
    "0009": ["AT", "FrameIncrementPointer"],
    "000A": ["AT", "FrameDimensionPointer"],
    "0010": ["US", "Rows"],
    "0011": ["US", "Columns"],
    "0012": ["US", "Planes"],
    "0014": ["US", "UltrasoundColorDataPresent"],
    "0030": ["DS", "PixelSpacing"],
    "0031": ["DS", "ZoomFactor"],
    "0032": ["DS", "ZoomCenter"],
    "0034": ["IS", "PixelAspectRatio"],
    "0040": ["CS", "ImageFormat"],
    "0050": ["LO", "ManipulatedImage"],
    "0051": ["CS", "CorrectedImage"],
    "005F": ["LO", "CompressionRecognitionCode"],
    "0060": ["CS", "CompressionCode"],
    "0061": ["SH", "CompressionOriginator"],
    "0062": ["LO", "CompressionLabel"],
    "0063": ["SH", "CompressionDescription"],
    "0065": ["CS", "CompressionSequence"],
    "0066": ["AT", "CompressionStepPointers"],
    "0068": ["US", "RepeatInterval"],
    "0069": ["US", "BitsGrouped"],
    "0070": ["US", "PerimeterTable"],
    "0071": ["SS", "PerimeterValue"],
    "0080": ["US", "PredictorRows"],
    "0081": ["US", "PredictorColumns"],
    "0082": ["US", "PredictorConstants"],
    "0090": ["CS", "BlockedPixels"],
    "0091": ["US", "BlockRows"],
    "0092": ["US", "BlockColumns"],
    "0093": ["US", "RowOverlap"],
    "0094": ["US", "ColumnOverlap"],
    "0100": ["US", "BitsAllocated"],
    "0101": ["US", "BitsStored"],
    "0102": ["US", "HighBit"],
    "0103": ["US", "PixelRepresentation"],
    "0104": ["SS", "SmallestValidPixelValue"],
    "0105": ["SS", "LargestValidPixelValue"],
    "0106": ["SS", "SmallestImagePixelValue"],
    "0107": ["SS", "LargestImagePixelValue"],
    "0108": ["SS", "SmallestPixelValueInSeries"],
    "0109": ["SS", "LargestPixelValueInSeries"],
    "0110": ["SS", "SmallestImagePixelValueInPlane"],
    "0111": ["SS", "LargestImagePixelValueInPlane"],
    "0120": ["SS", "PixelPaddingValue"],
    "0121": ["SS", "PixelPaddingRangeLimit"],
    "0200": ["US", "ImageLocation"],
    "0300": ["CS", "QualityControlImage"],
    "0301": ["CS", "BurnedInAnnotation"],
    "0302": ["CS", "RecognizableVisualFeatures"],
    "0303": ["CS", "LongitudinalTemporalInformationModified"],
    "0400": ["LO", "TransformLabel"],
    "0401": ["LO", "TransformVersionNumber"],
    "0402": ["US", "NumberOfTransformSteps"],
    "0403": ["LO", "SequenceOfCompressedData"],
    "0404": ["AT", "DetailsOfCoefficients"],
    "0700": ["LO", "DCTLabel"],
    "0701": ["CS", "DataBlockDescription"],
    "0702": ["AT", "DataBlock"],
    "0710": ["US", "NormalizationFactorFormat"],
    "0720": ["US", "ZonalMapNumberFormat"],
    "0721": ["AT", "ZonalMapLocation"],
    "0722": ["US", "ZonalMapFormat"],
    "0730": ["US", "AdaptiveMapFormat"],
    "0740": ["US", "CodeNumberFormat"],
    "0A02": ["CS", "PixelSpacingCalibrationType"],
    "0A04": ["LO", "PixelSpacingCalibrationDescription"],
    "1040": ["CS", "PixelIntensityRelationship"],
    "1041": ["SS", "PixelIntensityRelationshipSign"],
    "1050": ["DS", "WindowCenter"],
    "1051": ["DS", "WindowWidth"],
    "1052": ["DS", "RescaleIntercept"],
    "1053": ["DS", "RescaleSlope"],
    "1054": ["LO", "RescaleType"],
    "1055": ["LO", "WindowCenterWidthExplanation"],
    "1056": ["CS", "VOILUTFunction"],
    "1080": ["CS", "GrayScale"],
    "1090": ["CS", "RecommendedViewingMode"],
    "1100": ["SS", "GrayLookupTableDescriptor"],
    "1101": ["SS", "RedPaletteColorLookupTableDescriptor"],
    "1102": ["SS", "GreenPaletteColorLookupTableDescriptor"],
    "1103": ["SS", "BluePaletteColorLookupTableDescriptor"],
    "1104": ["US", "AlphaPaletteColorLookupTableDescriptor"],
    "1111": ["SS", "LargeRedPaletteColorLookupTableDescriptor"],
    "1112": ["SS", "LargeGreenPaletteColorLookupTableDescriptor"],
    "1113": ["SS", "LargeBluePaletteColorLookupTableDescriptor"],
    "1199": ["UI", "PaletteColorLookupTableUID"],
    "1200": ["OW", "GrayLookupTableData"],
    "1201": ["OW", "RedPaletteColorLookupTableData"],
    "1202": ["OW", "GreenPaletteColorLookupTableData"],
    "1203": ["OW", "BluePaletteColorLookupTableData"],
    "1204": ["OW", "AlphaPaletteColorLookupTableData"],
    "1211": ["OW", "LargeRedPaletteColorLookupTableData"],
    "1212": ["OW", "LargeGreenPaletteColorLookupTableData"],
    "1213": ["OW", "LargeBluePaletteColorLookupTableData"],
    "1214": ["UI", "LargePaletteColorLookupTableUID"],
    "1221": ["OW", "SegmentedRedPaletteColorLookupTableData"],
    "1222": ["OW", "SegmentedGreenPaletteColorLookupTableData"],
    "1223": ["OW", "SegmentedBluePaletteColorLookupTableData"],
    "1300": ["CS", "BreastImplantPresent"],
    "1350": ["CS", "PartialView"],
    "1351": ["ST", "PartialViewDescription"],
    "1352": ["SQ", "PartialViewCodeSequence"],
    "135A": ["CS", "SpatialLocationsPreserved"],
    "1401": ["SQ", "DataFrameAssignmentSequence"],
    "1402": ["CS", "DataPathAssignment"],
    "1403": ["US", "BitsMappedToColorLookupTable"],
    "1404": ["SQ", "BlendingLUT1Sequence"],
    "1405": ["CS", "BlendingLUT1TransferFunction"],
    "1406": ["FD", "BlendingWeightConstant"],
    "1407": ["US", "BlendingLookupTableDescriptor"],
    "1408": ["OW", "BlendingLookupTableData"],
    "140B": ["SQ", "EnhancedPaletteColorLookupTableSequence"],
    "140C": ["SQ", "BlendingLUT2Sequence"],
    "140D": ["CS", "BlendingLUT2TransferFunction"],
    "140E": ["CS", "DataPathID"],
    "140F": ["CS", "RGBLUTTransferFunction"],
    "1410": ["CS", "AlphaLUTTransferFunction"],
    "2000": ["OB", "ICCProfile"],
    "2110": ["CS", "LossyImageCompression"],
    "2112": ["DS", "LossyImageCompressionRatio"],
    "2114": ["CS", "LossyImageCompressionMethod"],
    "3000": ["SQ", "ModalityLUTSequence"],
    "3002": ["SS", "LUTDescriptor"],
    "3003": ["LO", "LUTExplanation"],
    "3004": ["LO", "ModalityLUTType"],
    "3006": ["OW", "LUTData"],
    "3010": ["SQ", "VOILUTSequence"],
    "3110": ["SQ", "SoftcopyVOILUTSequence"],
    "4000": ["LT", "ImagePresentationComments"],
    "5000": ["SQ", "BiPlaneAcquisitionSequence"],
    "6010": ["US", "RepresentativeFrameNumber"],
    "6020": ["US", "FrameNumbersOfInterest"],
    "6022": ["LO", "FrameOfInterestDescription"],
    "6023": ["CS", "FrameOfInterestType"],
    "6030": ["US", "MaskPointers"],
    "6040": ["US", "RWavePointer"],
    "6100": ["SQ", "MaskSubtractionSequence"],
    "6101": ["CS", "MaskOperation"],
    "6102": ["US", "ApplicableFrameRange"],
    "6110": ["US", "MaskFrameNumbers"],
    "6112": ["US", "ContrastFrameAveraging"],
    "6114": ["FL", "MaskSubPixelShift"],
    "6120": ["SS", "TIDOffset"],
    "6190": ["ST", "MaskOperationExplanation"],
    "7FE0": ["UT", "PixelDataProviderURL"],
    "9001": ["UL", "DataPointRows"],
    "9002": ["UL", "DataPointColumns"],
    "9003": ["CS", "SignalDomainColumns"],
    "9099": ["US", "LargestMonochromePixelValue"],
    "9108": ["CS", "DataRepresentation"],
    "9110": ["SQ", "PixelMeasuresSequence"],
    "9132": ["SQ", "FrameVOILUTSequence"],
    "9145": ["SQ", "PixelValueTransformationSequence"],
    "9235": ["CS", "SignalDomainRows"],
    "9411": ["FL", "DisplayFilterPercentage"],
    "9415": ["SQ", "FramePixelShiftSequence"],
    "9416": ["US", "SubtractionItemID"],
    "9422": ["SQ", "PixelIntensityRelationshipLUTSequence"],
    "9443": ["SQ", "FramePixelDataPropertiesSequence"],
    "9444": ["CS", "GeometricalProperties"],
    "9445": ["FL", "GeometricMaximumDistortion"],
    "9446": ["CS", "ImageProcessingApplied"],
    "9454": ["CS", "MaskSelectionMode"],
    "9474": ["CS", "LUTFunction"],
    "9478": ["FL", "MaskVisibilityPercentage"],
    "9501": ["SQ", "PixelShiftSequence"],
    "9502": ["SQ", "RegionPixelShiftSequence"],
    "9503": ["SS", "VerticesOfTheRegion"],
    "9505": ["SQ", "MultiFramePresentationSequence"],
    "9506": ["US", "PixelShiftFrameRange"],
    "9507": ["US", "LUTFrameRange"],
    "9520": ["DS", "ImageToEquipmentMappingMatrix"],
    "9537": ["CS", "EquipmentCoordinateSystemIdentification"]
  },
  "0032": {
    "000A": ["CS", "StudyStatusID"],
    "000C": ["CS", "StudyPriorityID"],
    "0012": ["LO", "StudyIDIssuer"],
    "0032": ["DA", "StudyVerifiedDate"],
    "0033": ["TM", "StudyVerifiedTime"],
    "0034": ["DA", "StudyReadDate"],
    "0035": ["TM", "StudyReadTime"],
    "1000": ["DA", "ScheduledStudyStartDate"],
    "1001": ["TM", "ScheduledStudyStartTime"],
    "1010": ["DA", "ScheduledStudyStopDate"],
    "1011": ["TM", "ScheduledStudyStopTime"],
    "1020": ["LO", "ScheduledStudyLocation"],
    "1021": ["AE", "ScheduledStudyLocationAETitle"],
    "1030": ["LO", "ReasonForStudy"],
    "1031": ["SQ", "RequestingPhysicianIdentificationSequence"],
    "1032": ["PN", "RequestingPhysician"],
    "1033": ["LO", "RequestingService"],
    "1034": ["SQ", "RequestingServiceCodeSequence"],
    "1040": ["DA", "StudyArrivalDate"],
    "1041": ["TM", "StudyArrivalTime"],
    "1050": ["DA", "StudyCompletionDate"],
    "1051": ["TM", "StudyCompletionTime"],
    "1055": ["CS", "StudyComponentStatusID"],
    "1060": ["LO", "RequestedProcedureDescription"],
    "1064": ["SQ", "RequestedProcedureCodeSequence"],
    "1070": ["LO", "RequestedContrastAgent"],
    "4000": ["LT", "StudyComments"]
  },
  "0038": {
    "0004": ["SQ", "ReferencedPatientAliasSequence"],
    "0008": ["CS", "VisitStatusID"],
    "0010": ["LO", "AdmissionID"],
    "0011": ["LO", "IssuerOfAdmissionID"],
    "0014": ["SQ", "IssuerOfAdmissionIDSequence"],
    "0016": ["LO", "RouteOfAdmissions"],
    "001A": ["DA", "ScheduledAdmissionDate"],
    "001B": ["TM", "ScheduledAdmissionTime"],
    "001C": ["DA", "ScheduledDischargeDate"],
    "001D": ["TM", "ScheduledDischargeTime"],
    "001E": ["LO", "ScheduledPatientInstitutionResidence"],
    "0020": ["DA", "AdmittingDate"],
    "0021": ["TM", "AdmittingTime"],
    "0030": ["DA", "DischargeDate"],
    "0032": ["TM", "DischargeTime"],
    "0040": ["LO", "DischargeDiagnosisDescription"],
    "0044": ["SQ", "DischargeDiagnosisCodeSequence"],
    "0050": ["LO", "SpecialNeeds"],
    "0060": ["LO", "ServiceEpisodeID"],
    "0061": ["LO", "IssuerOfServiceEpisodeID"],
    "0062": ["LO", "ServiceEpisodeDescription"],
    "0064": ["SQ", "IssuerOfServiceEpisodeIDSequence"],
    "0100": ["SQ", "PertinentDocumentsSequence"],
    "0300": ["LO", "CurrentPatientLocation"],
    "0400": ["LO", "PatientInstitutionResidence"],
    "0500": ["LO", "PatientState"],
    "0502": ["SQ", "PatientClinicalTrialParticipationSequence"],
    "4000": ["LT", "VisitComments"]
  },
  "003A": {
    "0004": ["CS", "WaveformOriginality"],
    "0005": ["US", "NumberOfWaveformChannels"],
    "0010": ["UL", "NumberOfWaveformSamples"],
    "001A": ["DS", "SamplingFrequency"],
    "0020": ["SH", "MultiplexGroupLabel"],
    "0200": ["SQ", "ChannelDefinitionSequence"],
    "0202": ["IS", "WaveformChannelNumber"],
    "0203": ["SH", "ChannelLabel"],
    "0205": ["CS", "ChannelStatus"],
    "0208": ["SQ", "ChannelSourceSequence"],
    "0209": ["SQ", "ChannelSourceModifiersSequence"],
    "020A": ["SQ", "SourceWaveformSequence"],
    "020C": ["LO", "ChannelDerivationDescription"],
    "0210": ["DS", "ChannelSensitivity"],
    "0211": ["SQ", "ChannelSensitivityUnitsSequence"],
    "0212": ["DS", "ChannelSensitivityCorrectionFactor"],
    "0213": ["DS", "ChannelBaseline"],
    "0214": ["DS", "ChannelTimeSkew"],
    "0215": ["DS", "ChannelSampleSkew"],
    "0218": ["DS", "ChannelOffset"],
    "021A": ["US", "WaveformBitsStored"],
    "0220": ["DS", "FilterLowFrequency"],
    "0221": ["DS", "FilterHighFrequency"],
    "0222": ["DS", "NotchFilterFrequency"],
    "0223": ["DS", "NotchFilterBandwidth"],
    "0230": ["FL", "WaveformDataDisplayScale"],
    "0231": ["US", "WaveformDisplayBackgroundCIELabValue"],
    "0240": ["SQ", "WaveformPresentationGroupSequence"],
    "0241": ["US", "PresentationGroupNumber"],
    "0242": ["SQ", "ChannelDisplaySequence"],
    "0244": ["US", "ChannelRecommendedDisplayCIELabValue"],
    "0245": ["FL", "ChannelPosition"],
    "0246": ["CS", "DisplayShadingFlag"],
    "0247": ["FL", "FractionalChannelDisplayScale"],
    "0248": ["FL", "AbsoluteChannelDisplayScale"],
    "0300": ["SQ", "MultiplexedAudioChannelsDescriptionCodeSequence"],
    "0301": ["IS", "ChannelIdentificationCode"],
    "0302": ["CS", "ChannelMode"]
  },
  "0040": {
    "0001": ["AE", "ScheduledStationAETitle"],
    "0002": ["DA", "ScheduledProcedureStepStartDate"],
    "0003": ["TM", "ScheduledProcedureStepStartTime"],
    "0004": ["DA", "ScheduledProcedureStepEndDate"],
    "0005": ["TM", "ScheduledProcedureStepEndTime"],
    "0006": ["PN", "ScheduledPerformingPhysicianName"],
    "0007": ["LO", "ScheduledProcedureStepDescription"],
    "0008": ["SQ", "ScheduledProtocolCodeSequence"],
    "0009": ["SH", "ScheduledProcedureStepID"],
    "000A": ["SQ", "StageCodeSequence"],
    "000B": ["SQ", "ScheduledPerformingPhysicianIdentificationSequence"],
    "0010": ["SH", "ScheduledStationName"],
    "0011": ["SH", "ScheduledProcedureStepLocation"],
    "0012": ["LO", "PreMedication"],
    "0020": ["CS", "ScheduledProcedureStepStatus"],
    "0026": ["SQ", "OrderPlacerIdentifierSequence"],
    "0027": ["SQ", "OrderFillerIdentifierSequence"],
    "0031": ["UT", "LocalNamespaceEntityID"],
    "0032": ["UT", "UniversalEntityID"],
    "0033": ["CS", "UniversalEntityIDType"],
    "0035": ["CS", "IdentifierTypeCode"],
    "0036": ["SQ", "AssigningFacilitySequence"],
    "0039": ["SQ", "AssigningJurisdictionCodeSequence"],
    "003A": ["SQ", "AssigningAgencyOrDepartmentCodeSequence"],
    "0100": ["SQ", "ScheduledProcedureStepSequence"],
    "0220": ["SQ", "ReferencedNonImageCompositeSOPInstanceSequence"],
    "0241": ["AE", "PerformedStationAETitle"],
    "0242": ["SH", "PerformedStationName"],
    "0243": ["SH", "PerformedLocation"],
    "0244": ["DA", "PerformedProcedureStepStartDate"],
    "0245": ["TM", "PerformedProcedureStepStartTime"],
    "0250": ["DA", "PerformedProcedureStepEndDate"],
    "0251": ["TM", "PerformedProcedureStepEndTime"],
    "0252": ["CS", "PerformedProcedureStepStatus"],
    "0253": ["SH", "PerformedProcedureStepID"],
    "0254": ["LO", "PerformedProcedureStepDescription"],
    "0255": ["LO", "PerformedProcedureTypeDescription"],
    "0260": ["SQ", "PerformedProtocolCodeSequence"],
    "0261": ["CS", "PerformedProtocolType"],
    "0270": ["SQ", "ScheduledStepAttributesSequence"],
    "0275": ["SQ", "RequestAttributesSequence"],
    "0280": ["ST", "CommentsOnThePerformedProcedureStep"],
    "0281": ["SQ", "PerformedProcedureStepDiscontinuationReasonCodeSequence"],
    "0293": ["SQ", "QuantitySequence"],
    "0294": ["DS", "Quantity"],
    "0295": ["SQ", "MeasuringUnitsSequence"],
    "0296": ["SQ", "BillingItemSequence"],
    "0300": ["US", "TotalTimeOfFluoroscopy"],
    "0301": ["US", "TotalNumberOfExposures"],
    "0302": ["US", "EntranceDose"],
    "0303": ["US", "ExposedArea"],
    "0306": ["DS", "DistanceSourceToEntrance"],
    "0307": ["DS", "DistanceSourceToSupport"],
    "030E": ["SQ", "ExposureDoseSequence"],
    "0310": ["ST", "CommentsOnRadiationDose"],
    "0312": ["DS", "XRayOutput"],
    "0314": ["DS", "HalfValueLayer"],
    "0316": ["DS", "OrganDose"],
    "0318": ["CS", "OrganExposed"],
    "0320": ["SQ", "BillingProcedureStepSequence"],
    "0321": ["SQ", "FilmConsumptionSequence"],
    "0324": ["SQ", "BillingSuppliesAndDevicesSequence"],
    "0330": ["SQ", "ReferencedProcedureStepSequence"],
    "0340": ["SQ", "PerformedSeriesSequence"],
    "0400": ["LT", "CommentsOnTheScheduledProcedureStep"],
    "0440": ["SQ", "ProtocolContextSequence"],
    "0441": ["SQ", "ContentItemModifierSequence"],
    "0500": ["SQ", "ScheduledSpecimenSequence"],
    "050A": ["LO", "SpecimenAccessionNumber"],
    "0512": ["LO", "ContainerIdentifier"],
    "0513": ["SQ", "IssuerOfTheContainerIdentifierSequence"],
    "0515": ["SQ", "AlternateContainerIdentifierSequence"],
    "0518": ["SQ", "ContainerTypeCodeSequence"],
    "051A": ["LO", "ContainerDescription"],
    "0520": ["SQ", "ContainerComponentSequence"],
    "0550": ["SQ", "SpecimenSequence"],
    "0551": ["LO", "SpecimenIdentifier"],
    "0552": ["SQ", "SpecimenDescriptionSequenceTrial"],
    "0553": ["ST", "SpecimenDescriptionTrial"],
    "0554": ["UI", "SpecimenUID"],
    "0555": ["SQ", "AcquisitionContextSequence"],
    "0556": ["ST", "AcquisitionContextDescription"],
    "059A": ["SQ", "SpecimenTypeCodeSequence"],
    "0560": ["SQ", "SpecimenDescriptionSequence"],
    "0562": ["SQ", "IssuerOfTheSpecimenIdentifierSequence"],
    "0600": ["LO", "SpecimenShortDescription"],
    "0602": ["UT", "SpecimenDetailedDescription"],
    "0610": ["SQ", "SpecimenPreparationSequence"],
    "0612": ["SQ", "SpecimenPreparationStepContentItemSequence"],
    "0620": ["SQ", "SpecimenLocalizationContentItemSequence"],
    "06FA": ["LO", "SlideIdentifier"],
    "071A": ["SQ", "ImageCenterPointCoordinatesSequence"],
    "072A": ["DS", "XOffsetInSlideCoordinateSystem"],
    "073A": ["DS", "YOffsetInSlideCoordinateSystem"],
    "074A": ["DS", "ZOffsetInSlideCoordinateSystem"],
    "08D8": ["SQ", "PixelSpacingSequence"],
    "08DA": ["SQ", "CoordinateSystemAxisCodeSequence"],
    "08EA": ["SQ", "MeasurementUnitsCodeSequence"],
    "09F8": ["SQ", "VitalStainCodeSequenceTrial"],
    "1001": ["SH", "RequestedProcedureID"],
    "1002": ["LO", "ReasonForTheRequestedProcedure"],
    "1003": ["SH", "RequestedProcedurePriority"],
    "1004": ["LO", "PatientTransportArrangements"],
    "1005": ["LO", "RequestedProcedureLocation"],
    "1006": ["SH", "PlacerOrderNumberProcedure"],
    "1007": ["SH", "FillerOrderNumberProcedure"],
    "1008": ["LO", "ConfidentialityCode"],
    "1009": ["SH", "ReportingPriority"],
    "100A": ["SQ", "ReasonForRequestedProcedureCodeSequence"],
    "1010": ["PN", "NamesOfIntendedRecipientsOfResults"],
    "1011": ["SQ", "IntendedRecipientsOfResultsIdentificationSequence"],
    "1012": ["SQ", "ReasonForPerformedProcedureCodeSequence"],
    "1060": ["LO", "RequestedProcedureDescriptionTrial"],
    "1101": ["SQ", "PersonIdentificationCodeSequence"],
    "1102": ["ST", "PersonAddress"],
    "1103": ["LO", "PersonTelephoneNumbers"],
    "1400": ["LT", "RequestedProcedureComments"],
    "2001": ["LO", "ReasonForTheImagingServiceRequest"],
    "2004": ["DA", "IssueDateOfImagingServiceRequest"],
    "2005": ["TM", "IssueTimeOfImagingServiceRequest"],
    "2006": ["SH", "PlacerOrderNumberImagingServiceRequestRetired"],
    "2007": ["SH", "FillerOrderNumberImagingServiceRequestRetired"],
    "2008": ["PN", "OrderEnteredBy"],
    "2009": ["SH", "OrderEntererLocation"],
    "2010": ["SH", "OrderCallbackPhoneNumber"],
    "2016": ["LO", "PlacerOrderNumberImagingServiceRequest"],
    "2017": ["LO", "FillerOrderNumberImagingServiceRequest"],
    "2400": ["LT", "ImagingServiceRequestComments"],
    "3001": ["LO", "ConfidentialityConstraintOnPatientDataDescription"],
    "4001": ["CS", "GeneralPurposeScheduledProcedureStepStatus"],
    "4002": ["CS", "GeneralPurposePerformedProcedureStepStatus"],
    "4003": ["CS", "GeneralPurposeScheduledProcedureStepPriority"],
    "4004": ["SQ", "ScheduledProcessingApplicationsCodeSequence"],
    "4005": ["DT", "ScheduledProcedureStepStartDateTime"],
    "4006": ["CS", "MultipleCopiesFlag"],
    "4007": ["SQ", "PerformedProcessingApplicationsCodeSequence"],
    "4009": ["SQ", "HumanPerformerCodeSequence"],
    "4010": ["DT", "ScheduledProcedureStepModificationDateTime"],
    "4011": ["DT", "ExpectedCompletionDateTime"],
    "4015": ["SQ", "ResultingGeneralPurposePerformedProcedureStepsSequence"],
    "4016": ["SQ", "ReferencedGeneralPurposeScheduledProcedureStepSequence"],
    "4018": ["SQ", "ScheduledWorkitemCodeSequence"],
    "4019": ["SQ", "PerformedWorkitemCodeSequence"],
    "4020": ["CS", "InputAvailabilityFlag"],
    "4021": ["SQ", "InputInformationSequence"],
    "4022": ["SQ", "RelevantInformationSequence"],
    "4023": ["UI", "ReferencedGeneralPurposeScheduledProcedureStepTransactionUID"],
    "4025": ["SQ", "ScheduledStationNameCodeSequence"],
    "4026": ["SQ", "ScheduledStationClassCodeSequence"],
    "4027": ["SQ", "ScheduledStationGeographicLocationCodeSequence"],
    "4028": ["SQ", "PerformedStationNameCodeSequence"],
    "4029": ["SQ", "PerformedStationClassCodeSequence"],
    "4030": ["SQ", "PerformedStationGeographicLocationCodeSequence"],
    "4031": ["SQ", "RequestedSubsequentWorkitemCodeSequence"],
    "4032": ["SQ", "NonDICOMOutputCodeSequence"],
    "4033": ["SQ", "OutputInformationSequence"],
    "4034": ["SQ", "ScheduledHumanPerformersSequence"],
    "4035": ["SQ", "ActualHumanPerformersSequence"],
    "4036": ["LO", "HumanPerformerOrganization"],
    "4037": ["PN", "HumanPerformerName"],
    "4040": ["CS", "RawDataHandling"],
    "4041": ["CS", "InputReadinessState"],
    "4050": ["DT", "PerformedProcedureStepStartDateTime"],
    "4051": ["DT", "PerformedProcedureStepEndDateTime"],
    "4052": ["DT", "ProcedureStepCancellationDateTime"],
    "8302": ["DS", "EntranceDoseInmGy"],
    "9094": ["SQ", "ReferencedImageRealWorldValueMappingSequence"],
    "9096": ["SQ", "RealWorldValueMappingSequence"],
    "9098": ["SQ", "PixelValueMappingCodeSequence"],
    "9210": ["SH", "LUTLabel"],
    "9211": ["SS", "RealWorldValueLastValueMapped"],
    "9212": ["FD", "RealWorldValueLUTData"],
    "9216": ["SS", "RealWorldValueFirstValueMapped"],
    "9224": ["FD", "RealWorldValueIntercept"],
    "9225": ["FD", "RealWorldValueSlope"],
    "A007": ["CS", "FindingsFlagTrial"],
    "A010": ["CS", "RelationshipType"],
    "A020": ["SQ", "FindingsSequenceTrial"],
    "A021": ["UI", "FindingsGroupUIDTrial"],
    "A022": ["UI", "ReferencedFindingsGroupUIDTrial"],
    "A023": ["DA", "FindingsGroupRecordingDateTrial"],
    "A024": ["TM", "FindingsGroupRecordingTimeTrial"],
    "A026": ["SQ", "FindingsSourceCategoryCodeSequenceTrial"],
    "A027": ["LO", "VerifyingOrganization"],
    "A028": ["SQ", "DocumentingOrganizationIdentifierCodeSequenceTrial"],
    "A030": ["DT", "VerificationDateTime"],
    "A032": ["DT", "ObservationDateTime"],
    "A040": ["CS", "ValueType"],
    "A043": ["SQ", "ConceptNameCodeSequence"],
    "A047": ["LO", "MeasurementPrecisionDescriptionTrial"],
    "A050": ["CS", "ContinuityOfContent"],
    "A057": ["CS", "UrgencyOrPriorityAlertsTrial"],
    "A060": ["LO", "SequencingIndicatorTrial"],
    "A066": ["SQ", "DocumentIdentifierCodeSequenceTrial"],
    "A067": ["PN", "DocumentAuthorTrial"],
    "A068": ["SQ", "DocumentAuthorIdentifierCodeSequenceTrial"],
    "A070": ["SQ", "IdentifierCodeSequenceTrial"],
    "A073": ["SQ", "VerifyingObserverSequence"],
    "A074": ["OB", "ObjectBinaryIdentifierTrial"],
    "A075": ["PN", "VerifyingObserverName"],
    "A076": ["SQ", "DocumentingObserverIdentifierCodeSequenceTrial"],
    "A078": ["SQ", "AuthorObserverSequence"],
    "A07A": ["SQ", "ParticipantSequence"],
    "A07C": ["SQ", "CustodialOrganizationSequence"],
    "A080": ["CS", "ParticipationType"],
    "A082": ["DT", "ParticipationDateTime"],
    "A084": ["CS", "ObserverType"],
    "A085": ["SQ", "ProcedureIdentifierCodeSequenceTrial"],
    "A088": ["SQ", "VerifyingObserverIdentificationCodeSequence"],
    "A089": ["OB", "ObjectDirectoryBinaryIdentifierTrial"],
    "A090": ["SQ", "EquivalentCDADocumentSequence"],
    "A0B0": ["US", "ReferencedWaveformChannels"],
    "A110": ["DA", "DateOfDocumentOrVerbalTransactionTrial"],
    "A112": ["TM", "TimeOfDocumentCreationOrVerbalTransactionTrial"],
    "A120": ["DT", "DateTime"],
    "A121": ["DA", "Date"],
    "A122": ["TM", "Time"],
    "A123": ["PN", "PersonName"],
    "A124": ["UI", "UID"],
    "A125": ["CS", "ReportStatusIDTrial"],
    "A130": ["CS", "TemporalRangeType"],
    "A132": ["UL", "ReferencedSamplePositions"],
    "A136": ["US", "ReferencedFrameNumbers"],
    "A138": ["DS", "ReferencedTimeOffsets"],
    "A13A": ["DT", "ReferencedDateTime"],
    "A160": ["UT", "TextValue"],
    "A167": ["SQ", "ObservationCategoryCodeSequenceTrial"],
    "A168": ["SQ", "ConceptCodeSequence"],
    "A16A": ["ST", "BibliographicCitationTrial"],
    "A170": ["SQ", "PurposeOfReferenceCodeSequence"],
    "A171": ["UI", "ObservationUIDTrial"],
    "A172": ["UI", "ReferencedObservationUIDTrial"],
    "A173": ["CS", "ReferencedObservationClassTrial"],
    "A174": ["CS", "ReferencedObjectObservationClassTrial"],
    "A180": ["US", "AnnotationGroupNumber"],
    "A192": ["DA", "ObservationDateTrial"],
    "A193": ["TM", "ObservationTimeTrial"],
    "A194": ["CS", "MeasurementAutomationTrial"],
    "A195": ["SQ", "ModifierCodeSequence"],
    "A224": ["ST", "IdentificationDescriptionTrial"],
    "A290": ["CS", "CoordinatesSetGeometricTypeTrial"],
    "A296": ["SQ", "AlgorithmCodeSequenceTrial"],
    "A297": ["ST", "AlgorithmDescriptionTrial"],
    "A29A": ["SL", "PixelCoordinatesSetTrial"],
    "A300": ["SQ", "MeasuredValueSequence"],
    "A301": ["SQ", "NumericValueQualifierCodeSequence"],
    "A307": ["PN", "CurrentObserverTrial"],
    "A30A": ["DS", "NumericValue"],
    "A313": ["SQ", "ReferencedAccessionSequenceTrial"],
    "A33A": ["ST", "ReportStatusCommentTrial"],
    "A340": ["SQ", "ProcedureContextSequenceTrial"],
    "A352": ["PN", "VerbalSourceTrial"],
    "A353": ["ST", "AddressTrial"],
    "A354": ["LO", "TelephoneNumberTrial"],
    "A358": ["SQ", "VerbalSourceIdentifierCodeSequenceTrial"],
    "A360": ["SQ", "PredecessorDocumentsSequence"],
    "A370": ["SQ", "ReferencedRequestSequence"],
    "A372": ["SQ", "PerformedProcedureCodeSequence"],
    "A375": ["SQ", "CurrentRequestedProcedureEvidenceSequence"],
    "A380": ["SQ", "ReportDetailSequenceTrial"],
    "A385": ["SQ", "PertinentOtherEvidenceSequence"],
    "A390": ["SQ", "HL7StructuredDocumentReferenceSequence"],
    "A402": ["UI", "ObservationSubjectUIDTrial"],
    "A403": ["CS", "ObservationSubjectClassTrial"],
    "A404": ["SQ", "ObservationSubjectTypeCodeSequenceTrial"],
    "A491": ["CS", "CompletionFlag"],
    "A492": ["LO", "CompletionFlagDescription"],
    "A493": ["CS", "VerificationFlag"],
    "A494": ["CS", "ArchiveRequested"],
    "A496": ["CS", "PreliminaryFlag"],
    "A504": ["SQ", "ContentTemplateSequence"],
    "A525": ["SQ", "IdenticalDocumentsSequence"],
    "A600": ["CS", "ObservationSubjectContextFlagTrial"],
    "A601": ["CS", "ObserverContextFlagTrial"],
    "A603": ["CS", "ProcedureContextFlagTrial"],
    "A730": ["SQ", "ContentSequence"],
    "A731": ["SQ", "RelationshipSequenceTrial"],
    "A732": ["SQ", "RelationshipTypeCodeSequenceTrial"],
    "A744": ["SQ", "LanguageCodeSequenceTrial"],
    "A992": ["ST", "UniformResourceLocatorTrial"],
    "B020": ["SQ", "WaveformAnnotationSequence"],
    "DB00": ["CS", "TemplateIdentifier"],
    "DB06": ["DT", "TemplateVersion"],
    "DB07": ["DT", "TemplateLocalVersion"],
    "DB0B": ["CS", "TemplateExtensionFlag"],
    "DB0C": ["UI", "TemplateExtensionOrganizationUID"],
    "DB0D": ["UI", "TemplateExtensionCreatorUID"],
    "DB73": ["UL", "ReferencedContentItemIdentifier"],
    "E001": ["ST", "HL7InstanceIdentifier"],
    "E004": ["DT", "HL7DocumentEffectiveTime"],
    "E006": ["SQ", "HL7DocumentTypeCodeSequence"],
    "E008": ["SQ", "DocumentClassCodeSequence"],
    "E010": ["UT", "RetrieveURI"],
    "E011": ["UI", "RetrieveLocationUID"],
    "E020": ["CS", "TypeOfInstances"],
    "E021": ["SQ", "DICOMRetrievalSequence"],
    "E022": ["SQ", "DICOMMediaRetrievalSequence"],
    "E023": ["SQ", "WADORetrievalSequence"],
    "E024": ["SQ", "XDSRetrievalSequence"],
    "E030": ["UI", "RepositoryUniqueID"],
    "E031": ["UI", "HomeCommunityID"]
  },
  "0042": {
    "0010": ["ST", "DocumentTitle"],
    "0011": ["OB", "EncapsulatedDocument"],
    "0012": ["LO", "MIMETypeOfEncapsulatedDocument"],
    "0013": ["SQ", "SourceInstanceSequence"],
    "0014": ["LO", "ListOfMIMETypes"]
  },
  "0044": {
    "0001": ["ST", "ProductPackageIdentifier"],
    "0002": ["CS", "SubstanceAdministrationApproval"],
    "0003": ["LT", "ApprovalStatusFurtherDescription"],
    "0004": ["DT", "ApprovalStatusDateTime"],
    "0007": ["SQ", "ProductTypeCodeSequence"],
    "0008": ["LO", "ProductName"],
    "0009": ["LT", "ProductDescription"],
    "000A": ["LO", "ProductLotIdentifier"],
    "000B": ["DT", "ProductExpirationDateTime"],
    "0010": ["DT", "SubstanceAdministrationDateTime"],
    "0011": ["LO", "SubstanceAdministrationNotes"],
    "0012": ["LO", "SubstanceAdministrationDeviceID"],
    "0013": ["SQ", "ProductParameterSequence"],
    "0019": ["SQ", "SubstanceAdministrationParameterSequence"]
  },
  "0046": {
    "0012": ["LO", "LensDescription"],
    "0014": ["SQ", "RightLensSequence"],
    "0015": ["SQ", "LeftLensSequence"],
    "0016": ["SQ", "UnspecifiedLateralityLensSequence"],
    "0018": ["SQ", "CylinderSequence"],
    "0028": ["SQ", "PrismSequence"],
    "0030": ["FD", "HorizontalPrismPower"],
    "0032": ["CS", "HorizontalPrismBase"],
    "0034": ["FD", "VerticalPrismPower"],
    "0036": ["CS", "VerticalPrismBase"],
    "0038": ["CS", "LensSegmentType"],
    "0040": ["FD", "OpticalTransmittance"],
    "0042": ["FD", "ChannelWidth"],
    "0044": ["FD", "PupilSize"],
    "0046": ["FD", "CornealSize"],
    "0050": ["SQ", "AutorefractionRightEyeSequence"],
    "0052": ["SQ", "AutorefractionLeftEyeSequence"],
    "0060": ["FD", "DistancePupillaryDistance"],
    "0062": ["FD", "NearPupillaryDistance"],
    "0063": ["FD", "IntermediatePupillaryDistance"],
    "0064": ["FD", "OtherPupillaryDistance"],
    "0070": ["SQ", "KeratometryRightEyeSequence"],
    "0071": ["SQ", "KeratometryLeftEyeSequence"],
    "0074": ["SQ", "SteepKeratometricAxisSequence"],
    "0075": ["FD", "RadiusOfCurvature"],
    "0076": ["FD", "KeratometricPower"],
    "0077": ["FD", "KeratometricAxis"],
    "0080": ["SQ", "FlatKeratometricAxisSequence"],
    "0092": ["CS", "BackgroundColor"],
    "0094": ["CS", "Optotype"],
    "0095": ["CS", "OptotypePresentation"],
    "0097": ["SQ", "SubjectiveRefractionRightEyeSequence"],
    "0098": ["SQ", "SubjectiveRefractionLeftEyeSequence"],
    "0100": ["SQ", "AddNearSequence"],
    "0101": ["SQ", "AddIntermediateSequence"],
    "0102": ["SQ", "AddOtherSequence"],
    "0104": ["FD", "AddPower"],
    "0106": ["FD", "ViewingDistance"],
    "0121": ["SQ", "VisualAcuityTypeCodeSequence"],
    "0122": ["SQ", "VisualAcuityRightEyeSequence"],
    "0123": ["SQ", "VisualAcuityLeftEyeSequence"],
    "0124": ["SQ", "VisualAcuityBothEyesOpenSequence"],
    "0125": ["CS", "ViewingDistanceType"],
    "0135": ["SS", "VisualAcuityModifiers"],
    "0137": ["FD", "DecimalVisualAcuity"],
    "0139": ["LO", "OptotypeDetailedDefinition"],
    "0145": ["SQ", "ReferencedRefractiveMeasurementsSequence"],
    "0146": ["FD", "SpherePower"],
    "0147": ["FD", "CylinderPower"]
  },
  "0048": {
    "0001": ["FL", "ImagedVolumeWidth"],
    "0002": ["FL", "ImagedVolumeHeight"],
    "0003": ["FL", "ImagedVolumeDepth"],
    "0006": ["UL", "TotalPixelMatrixColumns"],
    "0007": ["UL", "TotalPixelMatrixRows"],
    "0008": ["SQ", "TotalPixelMatrixOriginSequence"],
    "0010": ["CS", "SpecimenLabelInImage"],
    "0011": ["CS", "FocusMethod"],
    "0012": ["CS", "ExtendedDepthOfField"],
    "0013": ["US", "NumberOfFocalPlanes"],
    "0014": ["FL", "DistanceBetweenFocalPlanes"],
    "0015": ["US", "RecommendedAbsentPixelCIELabValue"],
    "0100": ["SQ", "IlluminatorTypeCodeSequence"],
    "0102": ["DS", "ImageOrientationSlide"],
    "0105": ["SQ", "OpticalPathSequence"],
    "0106": ["SH", "OpticalPathIdentifier"],
    "0107": ["ST", "OpticalPathDescription"],
    "0108": ["SQ", "IlluminationColorCodeSequence"],
    "0110": ["SQ", "SpecimenReferenceSequence"],
    "0111": ["DS", "CondenserLensPower"],
    "0112": ["DS", "ObjectiveLensPower"],
    "0113": ["DS", "ObjectiveLensNumericalAperture"],
    "0120": ["SQ", "PaletteColorLookupTableSequence"],
    "0200": ["SQ", "ReferencedImageNavigationSequence"],
    "0201": ["US", "TopLeftHandCornerOfLocalizerArea"],
    "0202": ["US", "BottomRightHandCornerOfLocalizerArea"],
    "0207": ["SQ", "OpticalPathIdentificationSequence"],
    "021A": ["SQ", "PlanePositionSlideSequence"],
    "021E": ["SL", "RowPositionInTotalImagePixelMatrix"],
    "021F": ["SL", "ColumnPositionInTotalImagePixelMatrix"],
    "0301": ["CS", "PixelOriginInterpretation"]
  },
  "0050": {
    "0004": ["CS", "CalibrationImage"],
    "0010": ["SQ", "DeviceSequence"],
    "0012": ["SQ", "ContainerComponentTypeCodeSequence"],
    "0013": ["FD", "ContainerComponentThickness"],
    "0014": ["DS", "DeviceLength"],
    "0015": ["FD", "ContainerComponentWidth"],
    "0016": ["DS", "DeviceDiameter"],
    "0017": ["CS", "DeviceDiameterUnits"],
    "0018": ["DS", "DeviceVolume"],
    "0019": ["DS", "InterMarkerDistance"],
    "001A": ["CS", "ContainerComponentMaterial"],
    "001B": ["LO", "ContainerComponentID"],
    "001C": ["FD", "ContainerComponentLength"],
    "001D": ["FD", "ContainerComponentDiameter"],
    "001E": ["LO", "ContainerComponentDescription"],
    "0020": ["LO", "DeviceDescription"]
  },
  "0052": {
    "0001": ["FL", "ContrastBolusIngredientPercentByVolume"],
    "0002": ["FD", "OCTFocalDistance"],
    "0003": ["FD", "BeamSpotSize"],
    "0004": ["FD", "EffectiveRefractiveIndex"],
    "0006": ["CS", "OCTAcquisitionDomain"],
    "0007": ["FD", "OCTOpticalCenterWavelength"],
    "0008": ["FD", "AxialResolution"],
    "0009": ["FD", "RangingDepth"],
    "0011": ["FD", "ALineRate"],
    "0012": ["US", "ALinesPerFrame"],
    "0013": ["FD", "CatheterRotationalRate"],
    "0014": ["FD", "ALinePixelSpacing"],
    "0016": ["SQ", "ModeOfPercutaneousAccessSequence"],
    "0025": ["SQ", "IntravascularOCTFrameTypeSequence"],
    "0026": ["CS", "OCTZOffsetApplied"],
    "0027": ["SQ", "IntravascularFrameContentSequence"],
    "0028": ["FD", "IntravascularLongitudinalDistance"],
    "0029": ["SQ", "IntravascularOCTFrameContentSequence"],
    "0030": ["SS", "OCTZOffsetCorrection"],
    "0031": ["CS", "CatheterDirectionOfRotation"],
    "0033": ["FD", "SeamLineLocation"],
    "0034": ["FD", "FirstALineLocation"],
    "0036": ["US", "SeamLineIndex"],
    "0038": ["US", "NumberOfPaddedAlines"],
    "0039": ["CS", "InterpolationType"],
    "003A": ["CS", "RefractiveIndexApplied"]
  },
  "0054": {
    "0010": ["US", "EnergyWindowVector"],
    "0011": ["US", "NumberOfEnergyWindows"],
    "0012": ["SQ", "EnergyWindowInformationSequence"],
    "0013": ["SQ", "EnergyWindowRangeSequence"],
    "0014": ["DS", "EnergyWindowLowerLimit"],
    "0015": ["DS", "EnergyWindowUpperLimit"],
    "0016": ["SQ", "RadiopharmaceuticalInformationSequence"],
    "0017": ["IS", "ResidualSyringeCounts"],
    "0018": ["SH", "EnergyWindowName"],
    "0020": ["US", "DetectorVector"],
    "0021": ["US", "NumberOfDetectors"],
    "0022": ["SQ", "DetectorInformationSequence"],
    "0030": ["US", "PhaseVector"],
    "0031": ["US", "NumberOfPhases"],
    "0032": ["SQ", "PhaseInformationSequence"],
    "0033": ["US", "NumberOfFramesInPhase"],
    "0036": ["IS", "PhaseDelay"],
    "0038": ["IS", "PauseBetweenFrames"],
    "0039": ["CS", "PhaseDescription"],
    "0050": ["US", "RotationVector"],
    "0051": ["US", "NumberOfRotations"],
    "0052": ["SQ", "RotationInformationSequence"],
    "0053": ["US", "NumberOfFramesInRotation"],
    "0060": ["US", "RRIntervalVector"],
    "0061": ["US", "NumberOfRRIntervals"],
    "0062": ["SQ", "GatedInformationSequence"],
    "0063": ["SQ", "DataInformationSequence"],
    "0070": ["US", "TimeSlotVector"],
    "0071": ["US", "NumberOfTimeSlots"],
    "0072": ["SQ", "TimeSlotInformationSequence"],
    "0073": ["DS", "TimeSlotTime"],
    "0080": ["US", "SliceVector"],
    "0081": ["US", "NumberOfSlices"],
    "0090": ["US", "AngularViewVector"],
    "0100": ["US", "TimeSliceVector"],
    "0101": ["US", "NumberOfTimeSlices"],
    "0200": ["DS", "StartAngle"],
    "0202": ["CS", "TypeOfDetectorMotion"],
    "0210": ["IS", "TriggerVector"],
    "0211": ["US", "NumberOfTriggersInPhase"],
    "0220": ["SQ", "ViewCodeSequence"],
    "0222": ["SQ", "ViewModifierCodeSequence"],
    "0300": ["SQ", "RadionuclideCodeSequence"],
    "0302": ["SQ", "AdministrationRouteCodeSequence"],
    "0304": ["SQ", "RadiopharmaceuticalCodeSequence"],
    "0306": ["SQ", "CalibrationDataSequence"],
    "0308": ["US", "EnergyWindowNumber"],
    "0400": ["SH", "ImageID"],
    "0410": ["SQ", "PatientOrientationCodeSequence"],
    "0412": ["SQ", "PatientOrientationModifierCodeSequence"],
    "0414": ["SQ", "PatientGantryRelationshipCodeSequence"],
    "0500": ["CS", "SliceProgressionDirection"],
    "1000": ["CS", "SeriesType"],
    "1001": ["CS", "Units"],
    "1002": ["CS", "CountsSource"],
    "1004": ["CS", "ReprojectionMethod"],
    "1006": ["CS", "SUVType"],
    "1100": ["CS", "RandomsCorrectionMethod"],
    "1101": ["LO", "AttenuationCorrectionMethod"],
    "1102": ["CS", "DecayCorrection"],
    "1103": ["LO", "ReconstructionMethod"],
    "1104": ["LO", "DetectorLinesOfResponseUsed"],
    "1105": ["LO", "ScatterCorrectionMethod"],
    "1200": ["DS", "AxialAcceptance"],
    "1201": ["IS", "AxialMash"],
    "1202": ["IS", "TransverseMash"],
    "1203": ["DS", "DetectorElementSize"],
    "1210": ["DS", "CoincidenceWindowWidth"],
    "1220": ["CS", "SecondaryCountsType"],
    "1300": ["DS", "FrameReferenceTime"],
    "1310": ["IS", "PrimaryPromptsCountsAccumulated"],
    "1311": ["IS", "SecondaryCountsAccumulated"],
    "1320": ["DS", "SliceSensitivityFactor"],
    "1321": ["DS", "DecayFactor"],
    "1322": ["DS", "DoseCalibrationFactor"],
    "1323": ["DS", "ScatterFractionFactor"],
    "1324": ["DS", "DeadTimeFactor"],
    "1330": ["US", "ImageIndex"],
    "1400": ["CS", "CountsIncluded"],
    "1401": ["CS", "DeadTimeCorrectionFlag"]
  },
  "0060": {
    "3000": ["SQ", "HistogramSequence"],
    "3002": ["US", "HistogramNumberOfBins"],
    "3004": ["SS", "HistogramFirstBinValue"],
    "3006": ["SS", "HistogramLastBinValue"],
    "3008": ["US", "HistogramBinWidth"],
    "3010": ["LO", "HistogramExplanation"],
    "3020": ["UL", "HistogramData"]
  },
  "0062": {
    "0001": ["CS", "SegmentationType"],
    "0002": ["SQ", "SegmentSequence"],
    "0003": ["SQ", "SegmentedPropertyCategoryCodeSequence"],
    "0004": ["US", "SegmentNumber"],
    "0005": ["LO", "SegmentLabel"],
    "0006": ["ST", "SegmentDescription"],
    "0008": ["CS", "SegmentAlgorithmType"],
    "0009": ["LO", "SegmentAlgorithmName"],
    "000A": ["SQ", "SegmentIdentificationSequence"],
    "000B": ["US", "ReferencedSegmentNumber"],
    "000C": ["US", "RecommendedDisplayGrayscaleValue"],
    "000D": ["US", "RecommendedDisplayCIELabValue"],
    "000E": ["US", "MaximumFractionalValue"],
    "000F": ["SQ", "SegmentedPropertyTypeCodeSequence"],
    "0010": ["CS", "SegmentationFractionalType"]
  },
  "0064": {
    "0002": ["SQ", "DeformableRegistrationSequence"],
    "0003": ["UI", "SourceFrameOfReferenceUID"],
    "0005": ["SQ", "DeformableRegistrationGridSequence"],
    "0007": ["UL", "GridDimensions"],
    "0008": ["FD", "GridResolution"],
    "0009": ["OF", "VectorGridData"],
    "000F": ["SQ", "PreDeformationMatrixRegistrationSequence"],
    "0010": ["SQ", "PostDeformationMatrixRegistrationSequence"]
  },
  "0066": {
    "0001": ["UL", "NumberOfSurfaces"],
    "0002": ["SQ", "SurfaceSequence"],
    "0003": ["UL", "SurfaceNumber"],
    "0004": ["LT", "SurfaceComments"],
    "0009": ["CS", "SurfaceProcessing"],
    "000A": ["FL", "SurfaceProcessingRatio"],
    "000B": ["LO", "SurfaceProcessingDescription"],
    "000C": ["FL", "RecommendedPresentationOpacity"],
    "000D": ["CS", "RecommendedPresentationType"],
    "000E": ["CS", "FiniteVolume"],
    "0010": ["CS", "Manifold"],
    "0011": ["SQ", "SurfacePointsSequence"],
    "0012": ["SQ", "SurfacePointsNormalsSequence"],
    "0013": ["SQ", "SurfaceMeshPrimitivesSequence"],
    "0015": ["UL", "NumberOfSurfacePoints"],
    "0016": ["OF", "PointCoordinatesData"],
    "0017": ["FL", "PointPositionAccuracy"],
    "0018": ["FL", "MeanPointDistance"],
    "0019": ["FL", "MaximumPointDistance"],
    "001A": ["FL", "PointsBoundingBoxCoordinates"],
    "001B": ["FL", "AxisOfRotation"],
    "001C": ["FL", "CenterOfRotation"],
    "001E": ["UL", "NumberOfVectors"],
    "001F": ["US", "VectorDimensionality"],
    "0020": ["FL", "VectorAccuracy"],
    "0021": ["OF", "VectorCoordinateData"],
    "0023": ["OW", "TrianglePointIndexList"],
    "0024": ["OW", "EdgePointIndexList"],
    "0025": ["OW", "VertexPointIndexList"],
    "0026": ["SQ", "TriangleStripSequence"],
    "0027": ["SQ", "TriangleFanSequence"],
    "0028": ["SQ", "LineSequence"],
    "0029": ["OW", "PrimitivePointIndexList"],
    "002A": ["UL", "SurfaceCount"],
    "002B": ["SQ", "ReferencedSurfaceSequence"],
    "002C": ["UL", "ReferencedSurfaceNumber"],
    "002D": ["SQ", "SegmentSurfaceGenerationAlgorithmIdentificationSequence"],
    "002E": ["SQ", "SegmentSurfaceSourceInstanceSequence"],
    "002F": ["SQ", "AlgorithmFamilyCodeSequence"],
    "0030": ["SQ", "AlgorithmNameCodeSequence"],
    "0031": ["LO", "AlgorithmVersion"],
    "0032": ["LT", "AlgorithmParameters"],
    "0034": ["SQ", "FacetSequence"],
    "0035": ["SQ", "SurfaceProcessingAlgorithmIdentificationSequence"],
    "0036": ["LO", "AlgorithmName"]
  },
  "0068": {
    "6210": ["LO", "ImplantSize"],
    "6221": ["LO", "ImplantTemplateVersion"],
    "6222": ["SQ", "ReplacedImplantTemplateSequence"],
    "6223": ["CS", "ImplantType"],
    "6224": ["SQ", "DerivationImplantTemplateSequence"],
    "6225": ["SQ", "OriginalImplantTemplateSequence"],
    "6226": ["DT", "EffectiveDateTime"],
    "6230": ["SQ", "ImplantTargetAnatomySequence"],
    "6260": ["SQ", "InformationFromManufacturerSequence"],
    "6265": ["SQ", "NotificationFromManufacturerSequence"],
    "6270": ["DT", "InformationIssueDateTime"],
    "6280": ["ST", "InformationSummary"],
    "62A0": ["SQ", "ImplantRegulatoryDisapprovalCodeSequence"],
    "62A5": ["FD", "OverallTemplateSpatialTolerance"],
    "62C0": ["SQ", "HPGLDocumentSequence"],
    "62D0": ["US", "HPGLDocumentID"],
    "62D5": ["LO", "HPGLDocumentLabel"],
    "62E0": ["SQ", "ViewOrientationCodeSequence"],
    "62F0": ["FD", "ViewOrientationModifier"],
    "62F2": ["FD", "HPGLDocumentScaling"],
    "6300": ["OB", "HPGLDocument"],
    "6310": ["US", "HPGLContourPenNumber"],
    "6320": ["SQ", "HPGLPenSequence"],
    "6330": ["US", "HPGLPenNumber"],
    "6340": ["LO", "HPGLPenLabel"],
    "6345": ["ST", "HPGLPenDescription"],
    "6346": ["FD", "RecommendedRotationPoint"],
    "6347": ["FD", "BoundingRectangle"],
    "6350": ["US", "ImplantTemplate3DModelSurfaceNumber"],
    "6360": ["SQ", "SurfaceModelDescriptionSequence"],
    "6380": ["LO", "SurfaceModelLabel"],
    "6390": ["FD", "SurfaceModelScalingFactor"],
    "63A0": ["SQ", "MaterialsCodeSequence"],
    "63A4": ["SQ", "CoatingMaterialsCodeSequence"],
    "63A8": ["SQ", "ImplantTypeCodeSequence"],
    "63AC": ["SQ", "FixationMethodCodeSequence"],
    "63B0": ["SQ", "MatingFeatureSetsSequence"],
    "63C0": ["US", "MatingFeatureSetID"],
    "63D0": ["LO", "MatingFeatureSetLabel"],
    "63E0": ["SQ", "MatingFeatureSequence"],
    "63F0": ["US", "MatingFeatureID"],
    "6400": ["SQ", "MatingFeatureDegreeOfFreedomSequence"],
    "6410": ["US", "DegreeOfFreedomID"],
    "6420": ["CS", "DegreeOfFreedomType"],
    "6430": ["SQ", "TwoDMatingFeatureCoordinatesSequence"],
    "6440": ["US", "ReferencedHPGLDocumentID"],
    "6450": ["FD", "TwoDMatingPoint"],
    "6460": ["FD", "TwoDMatingAxes"],
    "6470": ["SQ", "TwoDDegreeOfFreedomSequence"],
    "6490": ["FD", "ThreeDDegreeOfFreedomAxis"],
    "64A0": ["FD", "RangeOfFreedom"],
    "64C0": ["FD", "ThreeDMatingPoint"],
    "64D0": ["FD", "ThreeDMatingAxes"],
    "64F0": ["FD", "TwoDDegreeOfFreedomAxis"],
    "6500": ["SQ", "PlanningLandmarkPointSequence"],
    "6510": ["SQ", "PlanningLandmarkLineSequence"],
    "6520": ["SQ", "PlanningLandmarkPlaneSequence"],
    "6530": ["US", "PlanningLandmarkID"],
    "6540": ["LO", "PlanningLandmarkDescription"],
    "6545": ["SQ", "PlanningLandmarkIdentificationCodeSequence"],
    "6550": ["SQ", "TwoDPointCoordinatesSequence"],
    "6560": ["FD", "TwoDPointCoordinates"],
    "6590": ["FD", "ThreeDPointCoordinates"],
    "65A0": ["SQ", "TwoDLineCoordinatesSequence"],
    "65B0": ["FD", "TwoDLineCoordinates"],
    "65D0": ["FD", "ThreeDLineCoordinates"],
    "65E0": ["SQ", "TwoDPlaneCoordinatesSequence"],
    "65F0": ["FD", "TwoDPlaneIntersection"],
    "6610": ["FD", "ThreeDPlaneOrigin"],
    "6620": ["FD", "ThreeDPlaneNormal"]
  },
  "0070": {
    "0001": ["SQ", "GraphicAnnotationSequence"],
    "0002": ["CS", "GraphicLayer"],
    "0003": ["CS", "BoundingBoxAnnotationUnits"],
    "0004": ["CS", "AnchorPointAnnotationUnits"],
    "0005": ["CS", "GraphicAnnotationUnits"],
    "0006": ["ST", "UnformattedTextValue"],
    "0008": ["SQ", "TextObjectSequence"],
    "0009": ["SQ", "GraphicObjectSequence"],
    "0010": ["FL", "BoundingBoxTopLeftHandCorner"],
    "0011": ["FL", "BoundingBoxBottomRightHandCorner"],
    "0012": ["CS", "BoundingBoxTextHorizontalJustification"],
    "0014": ["FL", "AnchorPoint"],
    "0015": ["CS", "AnchorPointVisibility"],
    "0020": ["US", "GraphicDimensions"],
    "0021": ["US", "NumberOfGraphicPoints"],
    "0022": ["FL", "GraphicData"],
    "0023": ["CS", "GraphicType"],
    "0024": ["CS", "GraphicFilled"],
    "0040": ["IS", "ImageRotationRetired"],
    "0041": ["CS", "ImageHorizontalFlip"],
    "0042": ["US", "ImageRotation"],
    "0050": ["US", "DisplayedAreaTopLeftHandCornerTrial"],
    "0051": ["US", "DisplayedAreaBottomRightHandCornerTrial"],
    "0052": ["SL", "DisplayedAreaTopLeftHandCorner"],
    "0053": ["SL", "DisplayedAreaBottomRightHandCorner"],
    "005A": ["SQ", "DisplayedAreaSelectionSequence"],
    "0060": ["SQ", "GraphicLayerSequence"],
    "0062": ["IS", "GraphicLayerOrder"],
    "0066": ["US", "GraphicLayerRecommendedDisplayGrayscaleValue"],
    "0067": ["US", "GraphicLayerRecommendedDisplayRGBValue"],
    "0068": ["LO", "GraphicLayerDescription"],
    "0080": ["CS", "ContentLabel"],
    "0081": ["LO", "ContentDescription"],
    "0082": ["DA", "PresentationCreationDate"],
    "0083": ["TM", "PresentationCreationTime"],
    "0084": ["PN", "ContentCreatorName"],
    "0086": ["SQ", "ContentCreatorIdentificationCodeSequence"],
    "0087": ["SQ", "AlternateContentDescriptionSequence"],
    "0100": ["CS", "PresentationSizeMode"],
    "0101": ["DS", "PresentationPixelSpacing"],
    "0102": ["IS", "PresentationPixelAspectRatio"],
    "0103": ["FL", "PresentationPixelMagnificationRatio"],
    "0207": ["LO", "GraphicGroupLabel"],
    "0208": ["ST", "GraphicGroupDescription"],
    "0209": ["SQ", "CompoundGraphicSequence"],
    "0226": ["UL", "CompoundGraphicInstanceID"],
    "0227": ["LO", "FontName"],
    "0228": ["CS", "FontNameType"],
    "0229": ["LO", "CSSFontName"],
    "0230": ["FD", "RotationAngle"],
    "0231": ["SQ", "TextStyleSequence"],
    "0232": ["SQ", "LineStyleSequence"],
    "0233": ["SQ", "FillStyleSequence"],
    "0234": ["SQ", "GraphicGroupSequence"],
    "0241": ["US", "TextColorCIELabValue"],
    "0242": ["CS", "HorizontalAlignment"],
    "0243": ["CS", "VerticalAlignment"],
    "0244": ["CS", "ShadowStyle"],
    "0245": ["FL", "ShadowOffsetX"],
    "0246": ["FL", "ShadowOffsetY"],
    "0247": ["US", "ShadowColorCIELabValue"],
    "0248": ["CS", "Underlined"],
    "0249": ["CS", "Bold"],
    "0250": ["CS", "Italic"],
    "0251": ["US", "PatternOnColorCIELabValue"],
    "0252": ["US", "PatternOffColorCIELabValue"],
    "0253": ["FL", "LineThickness"],
    "0254": ["CS", "LineDashingStyle"],
    "0255": ["UL", "LinePattern"],
    "0256": ["OB", "FillPattern"],
    "0257": ["CS", "FillMode"],
    "0258": ["FL", "ShadowOpacity"],
    "0261": ["FL", "GapLength"],
    "0262": ["FL", "DiameterOfVisibility"],
    "0273": ["FL", "RotationPoint"],
    "0274": ["CS", "TickAlignment"],
    "0278": ["CS", "ShowTickLabel"],
    "0279": ["CS", "TickLabelAlignment"],
    "0282": ["CS", "CompoundGraphicUnits"],
    "0284": ["FL", "PatternOnOpacity"],
    "0285": ["FL", "PatternOffOpacity"],
    "0287": ["SQ", "MajorTicksSequence"],
    "0288": ["FL", "TickPosition"],
    "0289": ["SH", "TickLabel"],
    "0294": ["CS", "CompoundGraphicType"],
    "0295": ["UL", "GraphicGroupID"],
    "0306": ["CS", "ShapeType"],
    "0308": ["SQ", "RegistrationSequence"],
    "0309": ["SQ", "MatrixRegistrationSequence"],
    "030A": ["SQ", "MatrixSequence"],
    "030C": ["CS", "FrameOfReferenceTransformationMatrixType"],
    "030D": ["SQ", "RegistrationTypeCodeSequence"],
    "030F": ["ST", "FiducialDescription"],
    "0310": ["SH", "FiducialIdentifier"],
    "0311": ["SQ", "FiducialIdentifierCodeSequence"],
    "0312": ["FD", "ContourUncertaintyRadius"],
    "0314": ["SQ", "UsedFiducialsSequence"],
    "0318": ["SQ", "GraphicCoordinatesDataSequence"],
    "031A": ["UI", "FiducialUID"],
    "031C": ["SQ", "FiducialSetSequence"],
    "031E": ["SQ", "FiducialSequence"],
    "0401": ["US", "GraphicLayerRecommendedDisplayCIELabValue"],
    "0402": ["SQ", "BlendingSequence"],
    "0403": ["FL", "RelativeOpacity"],
    "0404": ["SQ", "ReferencedSpatialRegistrationSequence"],
    "0405": ["CS", "BlendingPosition"]
  },
  "0072": {
    "0002": ["SH", "HangingProtocolName"],
    "0004": ["LO", "HangingProtocolDescription"],
    "0006": ["CS", "HangingProtocolLevel"],
    "0008": ["LO", "HangingProtocolCreator"],
    "000A": ["DT", "HangingProtocolCreationDateTime"],
    "000C": ["SQ", "HangingProtocolDefinitionSequence"],
    "000E": ["SQ", "HangingProtocolUserIdentificationCodeSequence"],
    "0010": ["LO", "HangingProtocolUserGroupName"],
    "0012": ["SQ", "SourceHangingProtocolSequence"],
    "0014": ["US", "NumberOfPriorsReferenced"],
    "0020": ["SQ", "ImageSetsSequence"],
    "0022": ["SQ", "ImageSetSelectorSequence"],
    "0024": ["CS", "ImageSetSelectorUsageFlag"],
    "0026": ["AT", "SelectorAttribute"],
    "0028": ["US", "SelectorValueNumber"],
    "0030": ["SQ", "TimeBasedImageSetsSequence"],
    "0032": ["US", "ImageSetNumber"],
    "0034": ["CS", "ImageSetSelectorCategory"],
    "0038": ["US", "RelativeTime"],
    "003A": ["CS", "RelativeTimeUnits"],
    "003C": ["SS", "AbstractPriorValue"],
    "003E": ["SQ", "AbstractPriorCodeSequence"],
    "0040": ["LO", "ImageSetLabel"],
    "0050": ["CS", "SelectorAttributeVR"],
    "0052": ["AT", "SelectorSequencePointer"],
    "0054": ["LO", "SelectorSequencePointerPrivateCreator"],
    "0056": ["LO", "SelectorAttributePrivateCreator"],
    "0060": ["AT", "SelectorATValue"],
    "0062": ["CS", "SelectorCSValue"],
    "0064": ["IS", "SelectorISValue"],
    "0066": ["LO", "SelectorLOValue"],
    "0068": ["LT", "SelectorLTValue"],
    "006A": ["PN", "SelectorPNValue"],
    "006C": ["SH", "SelectorSHValue"],
    "006E": ["ST", "SelectorSTValue"],
    "0070": ["UT", "SelectorUTValue"],
    "0072": ["DS", "SelectorDSValue"],
    "0074": ["FD", "SelectorFDValue"],
    "0076": ["FL", "SelectorFLValue"],
    "0078": ["UL", "SelectorULValue"],
    "007A": ["US", "SelectorUSValue"],
    "007C": ["SL", "SelectorSLValue"],
    "007E": ["SS", "SelectorSSValue"],
    "0080": ["SQ", "SelectorCodeSequenceValue"],
    "0100": ["US", "NumberOfScreens"],
    "0102": ["SQ", "NominalScreenDefinitionSequence"],
    "0104": ["US", "NumberOfVerticalPixels"],
    "0106": ["US", "NumberOfHorizontalPixels"],
    "0108": ["FD", "DisplayEnvironmentSpatialPosition"],
    "010A": ["US", "ScreenMinimumGrayscaleBitDepth"],
    "010C": ["US", "ScreenMinimumColorBitDepth"],
    "010E": ["US", "ApplicationMaximumRepaintTime"],
    "0200": ["SQ", "DisplaySetsSequence"],
    "0202": ["US", "DisplaySetNumber"],
    "0203": ["LO", "DisplaySetLabel"],
    "0204": ["US", "DisplaySetPresentationGroup"],
    "0206": ["LO", "DisplaySetPresentationGroupDescription"],
    "0208": ["CS", "PartialDataDisplayHandling"],
    "0210": ["SQ", "SynchronizedScrollingSequence"],
    "0212": ["US", "DisplaySetScrollingGroup"],
    "0214": ["SQ", "NavigationIndicatorSequence"],
    "0216": ["US", "NavigationDisplaySet"],
    "0218": ["US", "ReferenceDisplaySets"],
    "0300": ["SQ", "ImageBoxesSequence"],
    "0302": ["US", "ImageBoxNumber"],
    "0304": ["CS", "ImageBoxLayoutType"],
    "0306": ["US", "ImageBoxTileHorizontalDimension"],
    "0308": ["US", "ImageBoxTileVerticalDimension"],
    "0310": ["CS", "ImageBoxScrollDirection"],
    "0312": ["CS", "ImageBoxSmallScrollType"],
    "0314": ["US", "ImageBoxSmallScrollAmount"],
    "0316": ["CS", "ImageBoxLargeScrollType"],
    "0318": ["US", "ImageBoxLargeScrollAmount"],
    "0320": ["US", "ImageBoxOverlapPriority"],
    "0330": ["FD", "CineRelativeToRealTime"],
    "0400": ["SQ", "FilterOperationsSequence"],
    "0402": ["CS", "FilterByCategory"],
    "0404": ["CS", "FilterByAttributePresence"],
    "0406": ["CS", "FilterByOperator"],
    "0420": ["US", "StructuredDisplayBackgroundCIELabValue"],
    "0421": ["US", "EmptyImageBoxCIELabValue"],
    "0422": ["SQ", "StructuredDisplayImageBoxSequence"],
    "0424": ["SQ", "StructuredDisplayTextBoxSequence"],
    "0427": ["SQ", "ReferencedFirstFrameSequence"],
    "0430": ["SQ", "ImageBoxSynchronizationSequence"],
    "0432": ["US", "SynchronizedImageBoxList"],
    "0434": ["CS", "TypeOfSynchronization"],
    "0500": ["CS", "BlendingOperationType"],
    "0510": ["CS", "ReformattingOperationType"],
    "0512": ["FD", "ReformattingThickness"],
    "0514": ["FD", "ReformattingInterval"],
    "0516": ["CS", "ReformattingOperationInitialViewDirection"],
    "0520": ["CS", "ThreeDRenderingType"],
    "0600": ["SQ", "SortingOperationsSequence"],
    "0602": ["CS", "SortByCategory"],
    "0604": ["CS", "SortingDirection"],
    "0700": ["CS", "DisplaySetPatientOrientation"],
    "0702": ["CS", "VOIType"],
    "0704": ["CS", "PseudoColorType"],
    "0705": ["SQ", "PseudoColorPaletteInstanceReferenceSequence"],
    "0706": ["CS", "ShowGrayscaleInverted"],
    "0710": ["CS", "ShowImageTrueSizeFlag"],
    "0712": ["CS", "ShowGraphicAnnotationFlag"],
    "0714": ["CS", "ShowPatientDemographicsFlag"],
    "0716": ["CS", "ShowAcquisitionTechniquesFlag"],
    "0717": ["CS", "DisplaySetHorizontalJustification"],
    "0718": ["CS", "DisplaySetVerticalJustification"]
  },
  "0074": {
    "0120": ["FD", "ContinuationStartMeterset"],
    "0121": ["FD", "ContinuationEndMeterset"],
    "1000": ["CS", "ProcedureStepState"],
    "1002": ["SQ", "ProcedureStepProgressInformationSequence"],
    "1004": ["DS", "ProcedureStepProgress"],
    "1006": ["ST", "ProcedureStepProgressDescription"],
    "1008": ["SQ", "ProcedureStepCommunicationsURISequence"],
    "100A": ["ST", "ContactURI"],
    "100C": ["LO", "ContactDisplayName"],
    "100E": ["SQ", "ProcedureStepDiscontinuationReasonCodeSequence"],
    "1020": ["SQ", "BeamTaskSequence"],
    "1022": ["CS", "BeamTaskType"],
    "1024": ["IS", "BeamOrderIndexTrial"],
    "1026": ["FD", "TableTopVerticalAdjustedPosition"],
    "1027": ["FD", "TableTopLongitudinalAdjustedPosition"],
    "1028": ["FD", "TableTopLateralAdjustedPosition"],
    "102A": ["FD", "PatientSupportAdjustedAngle"],
    "102B": ["FD", "TableTopEccentricAdjustedAngle"],
    "102C": ["FD", "TableTopPitchAdjustedAngle"],
    "102D": ["FD", "TableTopRollAdjustedAngle"],
    "1030": ["SQ", "DeliveryVerificationImageSequence"],
    "1032": ["CS", "VerificationImageTiming"],
    "1034": ["CS", "DoubleExposureFlag"],
    "1036": ["CS", "DoubleExposureOrdering"],
    "1038": ["DS", "DoubleExposureMetersetTrial"],
    "103A": ["DS", "DoubleExposureFieldDeltaTrial"],
    "1040": ["SQ", "RelatedReferenceRTImageSequence"],
    "1042": ["SQ", "GeneralMachineVerificationSequence"],
    "1044": ["SQ", "ConventionalMachineVerificationSequence"],
    "1046": ["SQ", "IonMachineVerificationSequence"],
    "1048": ["SQ", "FailedAttributesSequence"],
    "104A": ["SQ", "OverriddenAttributesSequence"],
    "104C": ["SQ", "ConventionalControlPointVerificationSequence"],
    "104E": ["SQ", "IonControlPointVerificationSequence"],
    "1050": ["SQ", "AttributeOccurrenceSequence"],
    "1052": ["AT", "AttributeOccurrencePointer"],
    "1054": ["UL", "AttributeItemSelector"],
    "1056": ["LO", "AttributeOccurrencePrivateCreator"],
    "1057": ["IS", "SelectorSequencePointerItems"],
    "1200": ["CS", "ScheduledProcedureStepPriority"],
    "1202": ["LO", "WorklistLabel"],
    "1204": ["LO", "ProcedureStepLabel"],
    "1210": ["SQ", "ScheduledProcessingParametersSequence"],
    "1212": ["SQ", "PerformedProcessingParametersSequence"],
    "1216": ["SQ", "UnifiedProcedureStepPerformedProcedureSequence"],
    "1220": ["SQ", "RelatedProcedureStepSequence"],
    "1222": ["LO", "ProcedureStepRelationshipType"],
    "1224": ["SQ", "ReplacedProcedureStepSequence"],
    "1230": ["LO", "DeletionLock"],
    "1234": ["AE", "ReceivingAE"],
    "1236": ["AE", "RequestingAE"],
    "1238": ["LT", "ReasonForCancellation"],
    "1242": ["CS", "SCPStatus"],
    "1244": ["CS", "SubscriptionListStatus"],
    "1246": ["CS", "UnifiedProcedureStepListStatus"],
    "1324": ["UL", "BeamOrderIndex"],
    "1338": ["FD", "DoubleExposureMeterset"],
    "133A": ["FD", "DoubleExposureFieldDelta"]
  },
  "0076": {
    "0001": ["LO", "ImplantAssemblyTemplateName"],
    "0003": ["LO", "ImplantAssemblyTemplateIssuer"],
    "0006": ["LO", "ImplantAssemblyTemplateVersion"],
    "0008": ["SQ", "ReplacedImplantAssemblyTemplateSequence"],
    "000A": ["CS", "ImplantAssemblyTemplateType"],
    "000C": ["SQ", "OriginalImplantAssemblyTemplateSequence"],
    "000E": ["SQ", "DerivationImplantAssemblyTemplateSequence"],
    "0010": ["SQ", "ImplantAssemblyTemplateTargetAnatomySequence"],
    "0020": ["SQ", "ProcedureTypeCodeSequence"],
    "0030": ["LO", "SurgicalTechnique"],
    "0032": ["SQ", "ComponentTypesSequence"],
    "0034": ["CS", "ComponentTypeCodeSequence"],
    "0036": ["CS", "ExclusiveComponentType"],
    "0038": ["CS", "MandatoryComponentType"],
    "0040": ["SQ", "ComponentSequence"],
    "0055": ["US", "ComponentID"],
    "0060": ["SQ", "ComponentAssemblySequence"],
    "0070": ["US", "Component1ReferencedID"],
    "0080": ["US", "Component1ReferencedMatingFeatureSetID"],
    "0090": ["US", "Component1ReferencedMatingFeatureID"],
    "00A0": ["US", "Component2ReferencedID"],
    "00B0": ["US", "Component2ReferencedMatingFeatureSetID"],
    "00C0": ["US", "Component2ReferencedMatingFeatureID"]
  },
  "0078": {
    "0001": ["LO", "ImplantTemplateGroupName"],
    "0010": ["ST", "ImplantTemplateGroupDescription"],
    "0020": ["LO", "ImplantTemplateGroupIssuer"],
    "0024": ["LO", "ImplantTemplateGroupVersion"],
    "0026": ["SQ", "ReplacedImplantTemplateGroupSequence"],
    "0028": ["SQ", "ImplantTemplateGroupTargetAnatomySequence"],
    "002A": ["SQ", "ImplantTemplateGroupMembersSequence"],
    "002E": ["US", "ImplantTemplateGroupMemberID"],
    "0050": ["FD", "ThreeDImplantTemplateGroupMemberMatchingPoint"],
    "0060": ["FD", "ThreeDImplantTemplateGroupMemberMatchingAxes"],
    "0070": ["SQ", "ImplantTemplateGroupMemberMatching2DCoordinatesSequence"],
    "0090": ["FD", "TwoDImplantTemplateGroupMemberMatchingPoint"],
    "00A0": ["FD", "TwoDImplantTemplateGroupMemberMatchingAxes"],
    "00B0": ["SQ", "ImplantTemplateGroupVariationDimensionSequence"],
    "00B2": ["LO", "ImplantTemplateGroupVariationDimensionName"],
    "00B4": ["SQ", "ImplantTemplateGroupVariationDimensionRankSequence"],
    "00B6": ["US", "ReferencedImplantTemplateGroupMemberID"],
    "00B8": ["US", "ImplantTemplateGroupVariationDimensionRank"]
  },
  "0088": {
    "0130": ["SH", "StorageMediaFileSetID"],
    "0140": ["UI", "StorageMediaFileSetUID"],
    "0200": ["SQ", "IconImageSequence"],
    "0904": ["LO", "TopicTitle"],
    "0906": ["ST", "TopicSubject"],
    "0910": ["LO", "TopicAuthor"],
    "0912": ["LO", "TopicKeywords"]
  },
  "0100": {
    "0410": ["CS", "SOPInstanceStatus"],
    "0420": ["DT", "SOPAuthorizationDateTime"],
    "0424": ["LT", "SOPAuthorizationComment"],
    "0426": ["LO", "AuthorizationEquipmentCertificationNumber"]
  },
  "0400": {
    "0005": ["US", "MACIDNumber"],
    "0010": ["UI", "MACCalculationTransferSyntaxUID"],
    "0015": ["CS", "MACAlgorithm"],
    "0020": ["AT", "DataElementsSigned"],
    "0100": ["UI", "DigitalSignatureUID"],
    "0105": ["DT", "DigitalSignatureDateTime"],
    "0110": ["CS", "CertificateType"],
    "0115": ["OB", "CertificateOfSigner"],
    "0120": ["OB", "Signature"],
    "0305": ["CS", "CertifiedTimestampType"],
    "0310": ["OB", "CertifiedTimestamp"],
    "0401": ["SQ", "DigitalSignaturePurposeCodeSequence"],
    "0402": ["SQ", "ReferencedDigitalSignatureSequence"],
    "0403": ["SQ", "ReferencedSOPInstanceMACSequence"],
    "0404": ["OB", "MAC"],
    "0500": ["SQ", "EncryptedAttributesSequence"],
    "0510": ["UI", "EncryptedContentTransferSyntaxUID"],
    "0520": ["OB", "EncryptedContent"],
    "0550": ["SQ", "ModifiedAttributesSequence"],
    "0561": ["SQ", "OriginalAttributesSequence"],
    "0562": ["DT", "AttributeModificationDateTime"],
    "0563": ["LO", "ModifyingSystem"],
    "0564": ["LO", "SourceOfPreviousValues"],
    "0565": ["CS", "ReasonForTheAttributeModification"]
  },
  "2000": {
    "0010": ["IS", "NumberOfCopies"],
    "001E": ["SQ", "PrinterConfigurationSequence"],
    "0020": ["CS", "PrintPriority"],
    "0030": ["CS", "MediumType"],
    "0040": ["CS", "FilmDestination"],
    "0050": ["LO", "FilmSessionLabel"],
    "0060": ["IS", "MemoryAllocation"],
    "0061": ["IS", "MaximumMemoryAllocation"],
    "0062": ["CS", "ColorImagePrintingFlag"],
    "0063": ["CS", "CollationFlag"],
    "0065": ["CS", "AnnotationFlag"],
    "0067": ["CS", "ImageOverlayFlag"],
    "0069": ["CS", "PresentationLUTFlag"],
    "006A": ["CS", "ImageBoxPresentationLUTFlag"],
    "00A0": ["US", "MemoryBitDepth"],
    "00A1": ["US", "PrintingBitDepth"],
    "00A2": ["SQ", "MediaInstalledSequence"],
    "00A4": ["SQ", "OtherMediaAvailableSequence"],
    "00A8": ["SQ", "SupportedImageDisplayFormatsSequence"],
    "0500": ["SQ", "ReferencedFilmBoxSequence"],
    "0510": ["SQ", "ReferencedStoredPrintSequence"]
  },
  "2010": {
    "0010": ["ST", "ImageDisplayFormat"],
    "0030": ["CS", "AnnotationDisplayFormatID"],
    "0040": ["CS", "FilmOrientation"],
    "0050": ["CS", "FilmSizeID"],
    "0052": ["CS", "PrinterResolutionID"],
    "0054": ["CS", "DefaultPrinterResolutionID"],
    "0060": ["CS", "MagnificationType"],
    "0080": ["CS", "SmoothingType"],
    "00A6": ["CS", "DefaultMagnificationType"],
    "00A7": ["CS", "OtherMagnificationTypesAvailable"],
    "00A8": ["CS", "DefaultSmoothingType"],
    "00A9": ["CS", "OtherSmoothingTypesAvailable"],
    "0100": ["CS", "BorderDensity"],
    "0110": ["CS", "EmptyImageDensity"],
    "0120": ["US", "MinDensity"],
    "0130": ["US", "MaxDensity"],
    "0140": ["CS", "Trim"],
    "0150": ["ST", "ConfigurationInformation"],
    "0152": ["LT", "ConfigurationInformationDescription"],
    "0154": ["IS", "MaximumCollatedFilms"],
    "015E": ["US", "Illumination"],
    "0160": ["US", "ReflectedAmbientLight"],
    "0376": ["DS", "PrinterPixelSpacing"],
    "0500": ["SQ", "ReferencedFilmSessionSequence"],
    "0510": ["SQ", "ReferencedImageBoxSequence"],
    "0520": ["SQ", "ReferencedBasicAnnotationBoxSequence"]
  },
  "2020": {
    "0010": ["US", "ImageBoxPosition"],
    "0020": ["CS", "Polarity"],
    "0030": ["DS", "RequestedImageSize"],
    "0040": ["CS", "RequestedDecimateCropBehavior"],
    "0050": ["CS", "RequestedResolutionID"],
    "00A0": ["CS", "RequestedImageSizeFlag"],
    "00A2": ["CS", "DecimateCropResult"],
    "0110": ["SQ", "BasicGrayscaleImageSequence"],
    "0111": ["SQ", "BasicColorImageSequence"],
    "0130": ["SQ", "ReferencedImageOverlayBoxSequence"],
    "0140": ["SQ", "ReferencedVOILUTBoxSequence"]
  },
  "2030": {
    "0010": ["US", "AnnotationPosition"],
    "0020": ["LO", "TextString"]
  },
  "2040": {
    "0010": ["SQ", "ReferencedOverlayPlaneSequence"],
    "0011": ["US", "ReferencedOverlayPlaneGroups"],
    "0020": ["SQ", "OverlayPixelDataSequence"],
    "0060": ["CS", "OverlayMagnificationType"],
    "0070": ["CS", "OverlaySmoothingType"],
    "0072": ["CS", "OverlayOrImageMagnification"],
    "0074": ["US", "MagnifyToNumberOfColumns"],
    "0080": ["CS", "OverlayForegroundDensity"],
    "0082": ["CS", "OverlayBackgroundDensity"],
    "0090": ["CS", "OverlayMode"],
    "0100": ["CS", "ThresholdDensity"],
    "0500": ["SQ", "ReferencedImageBoxSequenceRetired"]
  },
  "2050": {
    "0010": ["SQ", "PresentationLUTSequence"],
    "0020": ["CS", "PresentationLUTShape"],
    "0500": ["SQ", "ReferencedPresentationLUTSequence"]
  },
  "2100": {
    "0010": ["SH", "PrintJobID"],
    "0020": ["CS", "ExecutionStatus"],
    "0030": ["CS", "ExecutionStatusInfo"],
    "0040": ["DA", "CreationDate"],
    "0050": ["TM", "CreationTime"],
    "0070": ["AE", "Originator"],
    "0140": ["AE", "DestinationAE"],
    "0160": ["SH", "OwnerID"],
    "0170": ["IS", "NumberOfFilms"],
    "0500": ["SQ", "ReferencedPrintJobSequencePullStoredPrint"]
  },
  "2110": {
    "0010": ["CS", "PrinterStatus"],
    "0020": ["CS", "PrinterStatusInfo"],
    "0030": ["LO", "PrinterName"],
    "0099": ["SH", "PrintQueueID"]
  },
  "2120": {
    "0010": ["CS", "QueueStatus"],
    "0050": ["SQ", "PrintJobDescriptionSequence"],
    "0070": ["SQ", "ReferencedPrintJobSequence"]
  },
  "2130": {
    "0010": ["SQ", "PrintManagementCapabilitiesSequence"],
    "0015": ["SQ", "PrinterCharacteristicsSequence"],
    "0030": ["SQ", "FilmBoxContentSequence"],
    "0040": ["SQ", "ImageBoxContentSequence"],
    "0050": ["SQ", "AnnotationContentSequence"],
    "0060": ["SQ", "ImageOverlayBoxContentSequence"],
    "0080": ["SQ", "PresentationLUTContentSequence"],
    "00A0": ["SQ", "ProposedStudySequence"],
    "00C0": ["SQ", "OriginalImageSequence"]
  },
  "2200": {
    "0001": ["CS", "LabelUsingInformationExtractedFromInstances"],
    "0002": ["UT", "LabelText"],
    "0003": ["CS", "LabelStyleSelection"],
    "0004": ["LT", "MediaDisposition"],
    "0005": ["LT", "BarcodeValue"],
    "0006": ["CS", "BarcodeSymbology"],
    "0007": ["CS", "AllowMediaSplitting"],
    "0008": ["CS", "IncludeNonDICOMObjects"],
    "0009": ["CS", "IncludeDisplayApplication"],
    "000A": ["CS", "PreserveCompositeInstancesAfterMediaCreation"],
    "000B": ["US", "TotalNumberOfPiecesOfMediaCreated"],
    "000C": ["LO", "RequestedMediaApplicationProfile"],
    "000D": ["SQ", "ReferencedStorageMediaSequence"],
    "000E": ["AT", "FailureAttributes"],
    "000F": ["CS", "AllowLossyCompression"],
    "0020": ["CS", "RequestPriority"]
  },
  "3002": {
    "0002": ["SH", "RTImageLabel"],
    "0003": ["LO", "RTImageName"],
    "0004": ["ST", "RTImageDescription"],
    "000A": ["CS", "ReportedValuesOrigin"],
    "000C": ["CS", "RTImagePlane"],
    "000D": ["DS", "XRayImageReceptorTranslation"],
    "000E": ["DS", "XRayImageReceptorAngle"],
    "0010": ["DS", "RTImageOrientation"],
    "0011": ["DS", "ImagePlanePixelSpacing"],
    "0012": ["DS", "RTImagePosition"],
    "0020": ["SH", "RadiationMachineName"],
    "0022": ["DS", "RadiationMachineSAD"],
    "0024": ["DS", "RadiationMachineSSD"],
    "0026": ["DS", "RTImageSID"],
    "0028": ["DS", "SourceToReferenceObjectDistance"],
    "0029": ["IS", "FractionNumber"],
    "0030": ["SQ", "ExposureSequence"],
    "0032": ["DS", "MetersetExposure"],
    "0034": ["DS", "DiaphragmPosition"],
    "0040": ["SQ", "FluenceMapSequence"],
    "0041": ["CS", "FluenceDataSource"],
    "0042": ["DS", "FluenceDataScale"],
    "0050": ["SQ", "PrimaryFluenceModeSequence"],
    "0051": ["CS", "FluenceMode"],
    "0052": ["SH", "FluenceModeID"]
  },
  "3004": {
    "0001": ["CS", "DVHType"],
    "0002": ["CS", "DoseUnits"],
    "0004": ["CS", "DoseType"],
    "0006": ["LO", "DoseComment"],
    "0008": ["DS", "NormalizationPoint"],
    "000A": ["CS", "DoseSummationType"],
    "000C": ["DS", "GridFrameOffsetVector"],
    "000E": ["DS", "DoseGridScaling"],
    "0010": ["SQ", "RTDoseROISequence"],
    "0012": ["DS", "DoseValue"],
    "0014": ["CS", "TissueHeterogeneityCorrection"],
    "0040": ["DS", "DVHNormalizationPoint"],
    "0042": ["DS", "DVHNormalizationDoseValue"],
    "0050": ["SQ", "DVHSequence"],
    "0052": ["DS", "DVHDoseScaling"],
    "0054": ["CS", "DVHVolumeUnits"],
    "0056": ["IS", "DVHNumberOfBins"],
    "0058": ["DS", "DVHData"],
    "0060": ["SQ", "DVHReferencedROISequence"],
    "0062": ["CS", "DVHROIContributionType"],
    "0070": ["DS", "DVHMinimumDose"],
    "0072": ["DS", "DVHMaximumDose"],
    "0074": ["DS", "DVHMeanDose"]
  },
  "3006": {
    "0002": ["SH", "StructureSetLabel"],
    "0004": ["LO", "StructureSetName"],
    "0006": ["ST", "StructureSetDescription"],
    "0008": ["DA", "StructureSetDate"],
    "0009": ["TM", "StructureSetTime"],
    "0010": ["SQ", "ReferencedFrameOfReferenceSequence"],
    "0012": ["SQ", "RTReferencedStudySequence"],
    "0014": ["SQ", "RTReferencedSeriesSequence"],
    "0016": ["SQ", "ContourImageSequence"],
    "0020": ["SQ", "StructureSetROISequence"],
    "0022": ["IS", "ROINumber"],
    "0024": ["UI", "ReferencedFrameOfReferenceUID"],
    "0026": ["LO", "ROIName"],
    "0028": ["ST", "ROIDescription"],
    "002A": ["IS", "ROIDisplayColor"],
    "002C": ["DS", "ROIVolume"],
    "0030": ["SQ", "RTRelatedROISequence"],
    "0033": ["CS", "RTROIRelationship"],
    "0036": ["CS", "ROIGenerationAlgorithm"],
    "0038": ["LO", "ROIGenerationDescription"],
    "0039": ["SQ", "ROIContourSequence"],
    "0040": ["SQ", "ContourSequence"],
    "0042": ["CS", "ContourGeometricType"],
    "0044": ["DS", "ContourSlabThickness"],
    "0045": ["DS", "ContourOffsetVector"],
    "0046": ["IS", "NumberOfContourPoints"],
    "0048": ["IS", "ContourNumber"],
    "0049": ["IS", "AttachedContours"],
    "0050": ["DS", "ContourData"],
    "0080": ["SQ", "RTROIObservationsSequence"],
    "0082": ["IS", "ObservationNumber"],
    "0084": ["IS", "ReferencedROINumber"],
    "0085": ["SH", "ROIObservationLabel"],
    "0086": ["SQ", "RTROIIdentificationCodeSequence"],
    "0088": ["ST", "ROIObservationDescription"],
    "00A0": ["SQ", "RelatedRTROIObservationsSequence"],
    "00A4": ["CS", "RTROIInterpretedType"],
    "00A6": ["PN", "ROIInterpreter"],
    "00B0": ["SQ", "ROIPhysicalPropertiesSequence"],
    "00B2": ["CS", "ROIPhysicalProperty"],
    "00B4": ["DS", "ROIPhysicalPropertyValue"],
    "00B6": ["SQ", "ROIElementalCompositionSequence"],
    "00B7": ["US", "ROIElementalCompositionAtomicNumber"],
    "00B8": ["FL", "ROIElementalCompositionAtomicMassFraction"],
    "00C0": ["SQ", "FrameOfReferenceRelationshipSequence"],
    "00C2": ["UI", "RelatedFrameOfReferenceUID"],
    "00C4": ["CS", "FrameOfReferenceTransformationType"],
    "00C6": ["DS", "FrameOfReferenceTransformationMatrix"],
    "00C8": ["LO", "FrameOfReferenceTransformationComment"]
  },
  "3008": {
    "0010": ["SQ", "MeasuredDoseReferenceSequence"],
    "0012": ["ST", "MeasuredDoseDescription"],
    "0014": ["CS", "MeasuredDoseType"],
    "0016": ["DS", "MeasuredDoseValue"],
    "0020": ["SQ", "TreatmentSessionBeamSequence"],
    "0021": ["SQ", "TreatmentSessionIonBeamSequence"],
    "0022": ["IS", "CurrentFractionNumber"],
    "0024": ["DA", "TreatmentControlPointDate"],
    "0025": ["TM", "TreatmentControlPointTime"],
    "002A": ["CS", "TreatmentTerminationStatus"],
    "002B": ["SH", "TreatmentTerminationCode"],
    "002C": ["CS", "TreatmentVerificationStatus"],
    "0030": ["SQ", "ReferencedTreatmentRecordSequence"],
    "0032": ["DS", "SpecifiedPrimaryMeterset"],
    "0033": ["DS", "SpecifiedSecondaryMeterset"],
    "0036": ["DS", "DeliveredPrimaryMeterset"],
    "0037": ["DS", "DeliveredSecondaryMeterset"],
    "003A": ["DS", "SpecifiedTreatmentTime"],
    "003B": ["DS", "DeliveredTreatmentTime"],
    "0040": ["SQ", "ControlPointDeliverySequence"],
    "0041": ["SQ", "IonControlPointDeliverySequence"],
    "0042": ["DS", "SpecifiedMeterset"],
    "0044": ["DS", "DeliveredMeterset"],
    "0045": ["FL", "MetersetRateSet"],
    "0046": ["FL", "MetersetRateDelivered"],
    "0047": ["FL", "ScanSpotMetersetsDelivered"],
    "0048": ["DS", "DoseRateDelivered"],
    "0050": ["SQ", "TreatmentSummaryCalculatedDoseReferenceSequence"],
    "0052": ["DS", "CumulativeDoseToDoseReference"],
    "0054": ["DA", "FirstTreatmentDate"],
    "0056": ["DA", "MostRecentTreatmentDate"],
    "005A": ["IS", "NumberOfFractionsDelivered"],
    "0060": ["SQ", "OverrideSequence"],
    "0061": ["AT", "ParameterSequencePointer"],
    "0062": ["AT", "OverrideParameterPointer"],
    "0063": ["IS", "ParameterItemIndex"],
    "0064": ["IS", "MeasuredDoseReferenceNumber"],
    "0065": ["AT", "ParameterPointer"],
    "0066": ["ST", "OverrideReason"],
    "0068": ["SQ", "CorrectedParameterSequence"],
    "006A": ["FL", "CorrectionValue"],
    "0070": ["SQ", "CalculatedDoseReferenceSequence"],
    "0072": ["IS", "CalculatedDoseReferenceNumber"],
    "0074": ["ST", "CalculatedDoseReferenceDescription"],
    "0076": ["DS", "CalculatedDoseReferenceDoseValue"],
    "0078": ["DS", "StartMeterset"],
    "007A": ["DS", "EndMeterset"],
    "0080": ["SQ", "ReferencedMeasuredDoseReferenceSequence"],
    "0082": ["IS", "ReferencedMeasuredDoseReferenceNumber"],
    "0090": ["SQ", "ReferencedCalculatedDoseReferenceSequence"],
    "0092": ["IS", "ReferencedCalculatedDoseReferenceNumber"],
    "00A0": ["SQ", "BeamLimitingDeviceLeafPairsSequence"],
    "00B0": ["SQ", "RecordedWedgeSequence"],
    "00C0": ["SQ", "RecordedCompensatorSequence"],
    "00D0": ["SQ", "RecordedBlockSequence"],
    "00E0": ["SQ", "TreatmentSummaryMeasuredDoseReferenceSequence"],
    "00F0": ["SQ", "RecordedSnoutSequence"],
    "00F2": ["SQ", "RecordedRangeShifterSequence"],
    "00F4": ["SQ", "RecordedLateralSpreadingDeviceSequence"],
    "00F6": ["SQ", "RecordedRangeModulatorSequence"],
    "0100": ["SQ", "RecordedSourceSequence"],
    "0105": ["LO", "SourceSerialNumber"],
    "0110": ["SQ", "TreatmentSessionApplicationSetupSequence"],
    "0116": ["CS", "ApplicationSetupCheck"],
    "0120": ["SQ", "RecordedBrachyAccessoryDeviceSequence"],
    "0122": ["IS", "ReferencedBrachyAccessoryDeviceNumber"],
    "0130": ["SQ", "RecordedChannelSequence"],
    "0132": ["DS", "SpecifiedChannelTotalTime"],
    "0134": ["DS", "DeliveredChannelTotalTime"],
    "0136": ["IS", "SpecifiedNumberOfPulses"],
    "0138": ["IS", "DeliveredNumberOfPulses"],
    "013A": ["DS", "SpecifiedPulseRepetitionInterval"],
    "013C": ["DS", "DeliveredPulseRepetitionInterval"],
    "0140": ["SQ", "RecordedSourceApplicatorSequence"],
    "0142": ["IS", "ReferencedSourceApplicatorNumber"],
    "0150": ["SQ", "RecordedChannelShieldSequence"],
    "0152": ["IS", "ReferencedChannelShieldNumber"],
    "0160": ["SQ", "BrachyControlPointDeliveredSequence"],
    "0162": ["DA", "SafePositionExitDate"],
    "0164": ["TM", "SafePositionExitTime"],
    "0166": ["DA", "SafePositionReturnDate"],
    "0168": ["TM", "SafePositionReturnTime"],
    "0200": ["CS", "CurrentTreatmentStatus"],
    "0202": ["ST", "TreatmentStatusComment"],
    "0220": ["SQ", "FractionGroupSummarySequence"],
    "0223": ["IS", "ReferencedFractionNumber"],
    "0224": ["CS", "FractionGroupType"],
    "0230": ["CS", "BeamStopperPosition"],
    "0240": ["SQ", "FractionStatusSummarySequence"],
    "0250": ["DA", "TreatmentDate"],
    "0251": ["TM", "TreatmentTime"]
  },
  "300A": {
    "0002": ["SH", "RTPlanLabel"],
    "0003": ["LO", "RTPlanName"],
    "0004": ["ST", "RTPlanDescription"],
    "0006": ["DA", "RTPlanDate"],
    "0007": ["TM", "RTPlanTime"],
    "0009": ["LO", "TreatmentProtocols"],
    "000A": ["CS", "PlanIntent"],
    "000B": ["LO", "TreatmentSites"],
    "000C": ["CS", "RTPlanGeometry"],
    "000E": ["ST", "PrescriptionDescription"],
    "0010": ["SQ", "DoseReferenceSequence"],
    "0012": ["IS", "DoseReferenceNumber"],
    "0013": ["UI", "DoseReferenceUID"],
    "0014": ["CS", "DoseReferenceStructureType"],
    "0015": ["CS", "NominalBeamEnergyUnit"],
    "0016": ["LO", "DoseReferenceDescription"],
    "0018": ["DS", "DoseReferencePointCoordinates"],
    "001A": ["DS", "NominalPriorDose"],
    "0020": ["CS", "DoseReferenceType"],
    "0021": ["DS", "ConstraintWeight"],
    "0022": ["DS", "DeliveryWarningDose"],
    "0023": ["DS", "DeliveryMaximumDose"],
    "0025": ["DS", "TargetMinimumDose"],
    "0026": ["DS", "TargetPrescriptionDose"],
    "0027": ["DS", "TargetMaximumDose"],
    "0028": ["DS", "TargetUnderdoseVolumeFraction"],
    "002A": ["DS", "OrganAtRiskFullVolumeDose"],
    "002B": ["DS", "OrganAtRiskLimitDose"],
    "002C": ["DS", "OrganAtRiskMaximumDose"],
    "002D": ["DS", "OrganAtRiskOverdoseVolumeFraction"],
    "0040": ["SQ", "ToleranceTableSequence"],
    "0042": ["IS", "ToleranceTableNumber"],
    "0043": ["SH", "ToleranceTableLabel"],
    "0044": ["DS", "GantryAngleTolerance"],
    "0046": ["DS", "BeamLimitingDeviceAngleTolerance"],
    "0048": ["SQ", "BeamLimitingDeviceToleranceSequence"],
    "004A": ["DS", "BeamLimitingDevicePositionTolerance"],
    "004B": ["FL", "SnoutPositionTolerance"],
    "004C": ["DS", "PatientSupportAngleTolerance"],
    "004E": ["DS", "TableTopEccentricAngleTolerance"],
    "004F": ["FL", "TableTopPitchAngleTolerance"],
    "0050": ["FL", "TableTopRollAngleTolerance"],
    "0051": ["DS", "TableTopVerticalPositionTolerance"],
    "0052": ["DS", "TableTopLongitudinalPositionTolerance"],
    "0053": ["DS", "TableTopLateralPositionTolerance"],
    "0055": ["CS", "RTPlanRelationship"],
    "0070": ["SQ", "FractionGroupSequence"],
    "0071": ["IS", "FractionGroupNumber"],
    "0072": ["LO", "FractionGroupDescription"],
    "0078": ["IS", "NumberOfFractionsPlanned"],
    "0079": ["IS", "NumberOfFractionPatternDigitsPerDay"],
    "007A": ["IS", "RepeatFractionCycleLength"],
    "007B": ["LT", "FractionPattern"],
    "0080": ["IS", "NumberOfBeams"],
    "0082": ["DS", "BeamDoseSpecificationPoint"],
    "0084": ["DS", "BeamDose"],
    "0086": ["DS", "BeamMeterset"],
    "0088": ["FL", "BeamDosePointDepth"],
    "0089": ["FL", "BeamDosePointEquivalentDepth"],
    "008A": ["FL", "BeamDosePointSSD"],
    "00A0": ["IS", "NumberOfBrachyApplicationSetups"],
    "00A2": ["DS", "BrachyApplicationSetupDoseSpecificationPoint"],
    "00A4": ["DS", "BrachyApplicationSetupDose"],
    "00B0": ["SQ", "BeamSequence"],
    "00B2": ["SH", "TreatmentMachineName"],
    "00B3": ["CS", "PrimaryDosimeterUnit"],
    "00B4": ["DS", "SourceAxisDistance"],
    "00B6": ["SQ", "BeamLimitingDeviceSequence"],
    "00B8": ["CS", "RTBeamLimitingDeviceType"],
    "00BA": ["DS", "SourceToBeamLimitingDeviceDistance"],
    "00BB": ["FL", "IsocenterToBeamLimitingDeviceDistance"],
    "00BC": ["IS", "NumberOfLeafJawPairs"],
    "00BE": ["DS", "LeafPositionBoundaries"],
    "00C0": ["IS", "BeamNumber"],
    "00C2": ["LO", "BeamName"],
    "00C3": ["ST", "BeamDescription"],
    "00C4": ["CS", "BeamType"],
    "00C6": ["CS", "RadiationType"],
    "00C7": ["CS", "HighDoseTechniqueType"],
    "00C8": ["IS", "ReferenceImageNumber"],
    "00CA": ["SQ", "PlannedVerificationImageSequence"],
    "00CC": ["LO", "ImagingDeviceSpecificAcquisitionParameters"],
    "00CE": ["CS", "TreatmentDeliveryType"],
    "00D0": ["IS", "NumberOfWedges"],
    "00D1": ["SQ", "WedgeSequence"],
    "00D2": ["IS", "WedgeNumber"],
    "00D3": ["CS", "WedgeType"],
    "00D4": ["SH", "WedgeID"],
    "00D5": ["IS", "WedgeAngle"],
    "00D6": ["DS", "WedgeFactor"],
    "00D7": ["FL", "TotalWedgeTrayWaterEquivalentThickness"],
    "00D8": ["DS", "WedgeOrientation"],
    "00D9": ["FL", "IsocenterToWedgeTrayDistance"],
    "00DA": ["DS", "SourceToWedgeTrayDistance"],
    "00DB": ["FL", "WedgeThinEdgePosition"],
    "00DC": ["SH", "BolusID"],
    "00DD": ["ST", "BolusDescription"],
    "00E0": ["IS", "NumberOfCompensators"],
    "00E1": ["SH", "MaterialID"],
    "00E2": ["DS", "TotalCompensatorTrayFactor"],
    "00E3": ["SQ", "CompensatorSequence"],
    "00E4": ["IS", "CompensatorNumber"],
    "00E5": ["SH", "CompensatorID"],
    "00E6": ["DS", "SourceToCompensatorTrayDistance"],
    "00E7": ["IS", "CompensatorRows"],
    "00E8": ["IS", "CompensatorColumns"],
    "00E9": ["DS", "CompensatorPixelSpacing"],
    "00EA": ["DS", "CompensatorPosition"],
    "00EB": ["DS", "CompensatorTransmissionData"],
    "00EC": ["DS", "CompensatorThicknessData"],
    "00ED": ["IS", "NumberOfBoli"],
    "00EE": ["CS", "CompensatorType"],
    "00F0": ["IS", "NumberOfBlocks"],
    "00F2": ["DS", "TotalBlockTrayFactor"],
    "00F3": ["FL", "TotalBlockTrayWaterEquivalentThickness"],
    "00F4": ["SQ", "BlockSequence"],
    "00F5": ["SH", "BlockTrayID"],
    "00F6": ["DS", "SourceToBlockTrayDistance"],
    "00F7": ["FL", "IsocenterToBlockTrayDistance"],
    "00F8": ["CS", "BlockType"],
    "00F9": ["LO", "AccessoryCode"],
    "00FA": ["CS", "BlockDivergence"],
    "00FB": ["CS", "BlockMountingPosition"],
    "00FC": ["IS", "BlockNumber"],
    "00FE": ["LO", "BlockName"],
    "0100": ["DS", "BlockThickness"],
    "0102": ["DS", "BlockTransmission"],
    "0104": ["IS", "BlockNumberOfPoints"],
    "0106": ["DS", "BlockData"],
    "0107": ["SQ", "ApplicatorSequence"],
    "0108": ["SH", "ApplicatorID"],
    "0109": ["CS", "ApplicatorType"],
    "010A": ["LO", "ApplicatorDescription"],
    "010C": ["DS", "CumulativeDoseReferenceCoefficient"],
    "010E": ["DS", "FinalCumulativeMetersetWeight"],
    "0110": ["IS", "NumberOfControlPoints"],
    "0111": ["SQ", "ControlPointSequence"],
    "0112": ["IS", "ControlPointIndex"],
    "0114": ["DS", "NominalBeamEnergy"],
    "0115": ["DS", "DoseRateSet"],
    "0116": ["SQ", "WedgePositionSequence"],
    "0118": ["CS", "WedgePosition"],
    "011A": ["SQ", "BeamLimitingDevicePositionSequence"],
    "011C": ["DS", "LeafJawPositions"],
    "011E": ["DS", "GantryAngle"],
    "011F": ["CS", "GantryRotationDirection"],
    "0120": ["DS", "BeamLimitingDeviceAngle"],
    "0121": ["CS", "BeamLimitingDeviceRotationDirection"],
    "0122": ["DS", "PatientSupportAngle"],
    "0123": ["CS", "PatientSupportRotationDirection"],
    "0124": ["DS", "TableTopEccentricAxisDistance"],
    "0125": ["DS", "TableTopEccentricAngle"],
    "0126": ["CS", "TableTopEccentricRotationDirection"],
    "0128": ["DS", "TableTopVerticalPosition"],
    "0129": ["DS", "TableTopLongitudinalPosition"],
    "012A": ["DS", "TableTopLateralPosition"],
    "012C": ["DS", "IsocenterPosition"],
    "012E": ["DS", "SurfaceEntryPoint"],
    "0130": ["DS", "SourceToSurfaceDistance"],
    "0134": ["DS", "CumulativeMetersetWeight"],
    "0140": ["FL", "TableTopPitchAngle"],
    "0142": ["CS", "TableTopPitchRotationDirection"],
    "0144": ["FL", "TableTopRollAngle"],
    "0146": ["CS", "TableTopRollRotationDirection"],
    "0148": ["FL", "HeadFixationAngle"],
    "014A": ["FL", "GantryPitchAngle"],
    "014C": ["CS", "GantryPitchRotationDirection"],
    "014E": ["FL", "GantryPitchAngleTolerance"],
    "0180": ["SQ", "PatientSetupSequence"],
    "0182": ["IS", "PatientSetupNumber"],
    "0183": ["LO", "PatientSetupLabel"],
    "0184": ["LO", "PatientAdditionalPosition"],
    "0190": ["SQ", "FixationDeviceSequence"],
    "0192": ["CS", "FixationDeviceType"],
    "0194": ["SH", "FixationDeviceLabel"],
    "0196": ["ST", "FixationDeviceDescription"],
    "0198": ["SH", "FixationDevicePosition"],
    "0199": ["FL", "FixationDevicePitchAngle"],
    "019A": ["FL", "FixationDeviceRollAngle"],
    "01A0": ["SQ", "ShieldingDeviceSequence"],
    "01A2": ["CS", "ShieldingDeviceType"],
    "01A4": ["SH", "ShieldingDeviceLabel"],
    "01A6": ["ST", "ShieldingDeviceDescription"],
    "01A8": ["SH", "ShieldingDevicePosition"],
    "01B0": ["CS", "SetupTechnique"],
    "01B2": ["ST", "SetupTechniqueDescription"],
    "01B4": ["SQ", "SetupDeviceSequence"],
    "01B6": ["CS", "SetupDeviceType"],
    "01B8": ["SH", "SetupDeviceLabel"],
    "01BA": ["ST", "SetupDeviceDescription"],
    "01BC": ["DS", "SetupDeviceParameter"],
    "01D0": ["ST", "SetupReferenceDescription"],
    "01D2": ["DS", "TableTopVerticalSetupDisplacement"],
    "01D4": ["DS", "TableTopLongitudinalSetupDisplacement"],
    "01D6": ["DS", "TableTopLateralSetupDisplacement"],
    "0200": ["CS", "BrachyTreatmentTechnique"],
    "0202": ["CS", "BrachyTreatmentType"],
    "0206": ["SQ", "TreatmentMachineSequence"],
    "0210": ["SQ", "SourceSequence"],
    "0212": ["IS", "SourceNumber"],
    "0214": ["CS", "SourceType"],
    "0216": ["LO", "SourceManufacturer"],
    "0218": ["DS", "ActiveSourceDiameter"],
    "021A": ["DS", "ActiveSourceLength"],
    "0222": ["DS", "SourceEncapsulationNominalThickness"],
    "0224": ["DS", "SourceEncapsulationNominalTransmission"],
    "0226": ["LO", "SourceIsotopeName"],
    "0228": ["DS", "SourceIsotopeHalfLife"],
    "0229": ["CS", "SourceStrengthUnits"],
    "022A": ["DS", "ReferenceAirKermaRate"],
    "022B": ["DS", "SourceStrength"],
    "022C": ["DA", "SourceStrengthReferenceDate"],
    "022E": ["TM", "SourceStrengthReferenceTime"],
    "0230": ["SQ", "ApplicationSetupSequence"],
    "0232": ["CS", "ApplicationSetupType"],
    "0234": ["IS", "ApplicationSetupNumber"],
    "0236": ["LO", "ApplicationSetupName"],
    "0238": ["LO", "ApplicationSetupManufacturer"],
    "0240": ["IS", "TemplateNumber"],
    "0242": ["SH", "TemplateType"],
    "0244": ["LO", "TemplateName"],
    "0250": ["DS", "TotalReferenceAirKerma"],
    "0260": ["SQ", "BrachyAccessoryDeviceSequence"],
    "0262": ["IS", "BrachyAccessoryDeviceNumber"],
    "0263": ["SH", "BrachyAccessoryDeviceID"],
    "0264": ["CS", "BrachyAccessoryDeviceType"],
    "0266": ["LO", "BrachyAccessoryDeviceName"],
    "026A": ["DS", "BrachyAccessoryDeviceNominalThickness"],
    "026C": ["DS", "BrachyAccessoryDeviceNominalTransmission"],
    "0280": ["SQ", "ChannelSequence"],
    "0282": ["IS", "ChannelNumber"],
    "0284": ["DS", "ChannelLength"],
    "0286": ["DS", "ChannelTotalTime"],
    "0288": ["CS", "SourceMovementType"],
    "028A": ["IS", "NumberOfPulses"],
    "028C": ["DS", "PulseRepetitionInterval"],
    "0290": ["IS", "SourceApplicatorNumber"],
    "0291": ["SH", "SourceApplicatorID"],
    "0292": ["CS", "SourceApplicatorType"],
    "0294": ["LO", "SourceApplicatorName"],
    "0296": ["DS", "SourceApplicatorLength"],
    "0298": ["LO", "SourceApplicatorManufacturer"],
    "029C": ["DS", "SourceApplicatorWallNominalThickness"],
    "029E": ["DS", "SourceApplicatorWallNominalTransmission"],
    "02A0": ["DS", "SourceApplicatorStepSize"],
    "02A2": ["IS", "TransferTubeNumber"],
    "02A4": ["DS", "TransferTubeLength"],
    "02B0": ["SQ", "ChannelShieldSequence"],
    "02B2": ["IS", "ChannelShieldNumber"],
    "02B3": ["SH", "ChannelShieldID"],
    "02B4": ["LO", "ChannelShieldName"],
    "02B8": ["DS", "ChannelShieldNominalThickness"],
    "02BA": ["DS", "ChannelShieldNominalTransmission"],
    "02C8": ["DS", "FinalCumulativeTimeWeight"],
    "02D0": ["SQ", "BrachyControlPointSequence"],
    "02D2": ["DS", "ControlPointRelativePosition"],
    "02D4": ["DS", "ControlPoint3DPosition"],
    "02D6": ["DS", "CumulativeTimeWeight"],
    "02E0": ["CS", "CompensatorDivergence"],
    "02E1": ["CS", "CompensatorMountingPosition"],
    "02E2": ["DS", "SourceToCompensatorDistance"],
    "02E3": ["FL", "TotalCompensatorTrayWaterEquivalentThickness"],
    "02E4": ["FL", "IsocenterToCompensatorTrayDistance"],
    "02E5": ["FL", "CompensatorColumnOffset"],
    "02E6": ["FL", "IsocenterToCompensatorDistances"],
    "02E7": ["FL", "CompensatorRelativeStoppingPowerRatio"],
    "02E8": ["FL", "CompensatorMillingToolDiameter"],
    "02EA": ["SQ", "IonRangeCompensatorSequence"],
    "02EB": ["LT", "CompensatorDescription"],
    "0302": ["IS", "RadiationMassNumber"],
    "0304": ["IS", "RadiationAtomicNumber"],
    "0306": ["SS", "RadiationChargeState"],
    "0308": ["CS", "ScanMode"],
    "030A": ["FL", "VirtualSourceAxisDistances"],
    "030C": ["SQ", "SnoutSequence"],
    "030D": ["FL", "SnoutPosition"],
    "030F": ["SH", "SnoutID"],
    "0312": ["IS", "NumberOfRangeShifters"],
    "0314": ["SQ", "RangeShifterSequence"],
    "0316": ["IS", "RangeShifterNumber"],
    "0318": ["SH", "RangeShifterID"],
    "0320": ["CS", "RangeShifterType"],
    "0322": ["LO", "RangeShifterDescription"],
    "0330": ["IS", "NumberOfLateralSpreadingDevices"],
    "0332": ["SQ", "LateralSpreadingDeviceSequence"],
    "0334": ["IS", "LateralSpreadingDeviceNumber"],
    "0336": ["SH", "LateralSpreadingDeviceID"],
    "0338": ["CS", "LateralSpreadingDeviceType"],
    "033A": ["LO", "LateralSpreadingDeviceDescription"],
    "033C": ["FL", "LateralSpreadingDeviceWaterEquivalentThickness"],
    "0340": ["IS", "NumberOfRangeModulators"],
    "0342": ["SQ", "RangeModulatorSequence"],
    "0344": ["IS", "RangeModulatorNumber"],
    "0346": ["SH", "RangeModulatorID"],
    "0348": ["CS", "RangeModulatorType"],
    "034A": ["LO", "RangeModulatorDescription"],
    "034C": ["SH", "BeamCurrentModulationID"],
    "0350": ["CS", "PatientSupportType"],
    "0352": ["SH", "PatientSupportID"],
    "0354": ["LO", "PatientSupportAccessoryCode"],
    "0356": ["FL", "FixationLightAzimuthalAngle"],
    "0358": ["FL", "FixationLightPolarAngle"],
    "035A": ["FL", "MetersetRate"],
    "0360": ["SQ", "RangeShifterSettingsSequence"],
    "0362": ["LO", "RangeShifterSetting"],
    "0364": ["FL", "IsocenterToRangeShifterDistance"],
    "0366": ["FL", "RangeShifterWaterEquivalentThickness"],
    "0370": ["SQ", "LateralSpreadingDeviceSettingsSequence"],
    "0372": ["LO", "LateralSpreadingDeviceSetting"],
    "0374": ["FL", "IsocenterToLateralSpreadingDeviceDistance"],
    "0380": ["SQ", "RangeModulatorSettingsSequence"],
    "0382": ["FL", "RangeModulatorGatingStartValue"],
    "0384": ["FL", "RangeModulatorGatingStopValue"],
    "0386": ["FL", "RangeModulatorGatingStartWaterEquivalentThickness"],
    "0388": ["FL", "RangeModulatorGatingStopWaterEquivalentThickness"],
    "038A": ["FL", "IsocenterToRangeModulatorDistance"],
    "0390": ["SH", "ScanSpotTuneID"],
    "0392": ["IS", "NumberOfScanSpotPositions"],
    "0394": ["FL", "ScanSpotPositionMap"],
    "0396": ["FL", "ScanSpotMetersetWeights"],
    "0398": ["FL", "ScanningSpotSize"],
    "039A": ["IS", "NumberOfPaintings"],
    "03A0": ["SQ", "IonToleranceTableSequence"],
    "03A2": ["SQ", "IonBeamSequence"],
    "03A4": ["SQ", "IonBeamLimitingDeviceSequence"],
    "03A6": ["SQ", "IonBlockSequence"],
    "03A8": ["SQ", "IonControlPointSequence"],
    "03AA": ["SQ", "IonWedgeSequence"],
    "03AC": ["SQ", "IonWedgePositionSequence"],
    "0401": ["SQ", "ReferencedSetupImageSequence"],
    "0402": ["ST", "SetupImageComment"],
    "0410": ["SQ", "MotionSynchronizationSequence"],
    "0412": ["FL", "ControlPointOrientation"],
    "0420": ["SQ", "GeneralAccessorySequence"],
    "0421": ["SH", "GeneralAccessoryID"],
    "0422": ["ST", "GeneralAccessoryDescription"],
    "0423": ["CS", "GeneralAccessoryType"],
    "0424": ["IS", "GeneralAccessoryNumber"],
    "0431": ["SQ", "ApplicatorGeometrySequence"],
    "0432": ["CS", "ApplicatorApertureShape"],
    "0433": ["FL", "ApplicatorOpening"],
    "0434": ["FL", "ApplicatorOpeningX"],
    "0435": ["FL", "ApplicatorOpeningY"],
    "0436": ["FL", "SourceToApplicatorMountingPositionDistance"]
  },
  "300C": {
    "0002": ["SQ", "ReferencedRTPlanSequence"],
    "0004": ["SQ", "ReferencedBeamSequence"],
    "0006": ["IS", "ReferencedBeamNumber"],
    "0007": ["IS", "ReferencedReferenceImageNumber"],
    "0008": ["DS", "StartCumulativeMetersetWeight"],
    "0009": ["DS", "EndCumulativeMetersetWeight"],
    "000A": ["SQ", "ReferencedBrachyApplicationSetupSequence"],
    "000C": ["IS", "ReferencedBrachyApplicationSetupNumber"],
    "000E": ["IS", "ReferencedSourceNumber"],
    "0020": ["SQ", "ReferencedFractionGroupSequence"],
    "0022": ["IS", "ReferencedFractionGroupNumber"],
    "0040": ["SQ", "ReferencedVerificationImageSequence"],
    "0042": ["SQ", "ReferencedReferenceImageSequence"],
    "0050": ["SQ", "ReferencedDoseReferenceSequence"],
    "0051": ["IS", "ReferencedDoseReferenceNumber"],
    "0055": ["SQ", "BrachyReferencedDoseReferenceSequence"],
    "0060": ["SQ", "ReferencedStructureSetSequence"],
    "006A": ["IS", "ReferencedPatientSetupNumber"],
    "0080": ["SQ", "ReferencedDoseSequence"],
    "00A0": ["IS", "ReferencedToleranceTableNumber"],
    "00B0": ["SQ", "ReferencedBolusSequence"],
    "00C0": ["IS", "ReferencedWedgeNumber"],
    "00D0": ["IS", "ReferencedCompensatorNumber"],
    "00E0": ["IS", "ReferencedBlockNumber"],
    "00F0": ["IS", "ReferencedControlPointIndex"],
    "00F2": ["SQ", "ReferencedControlPointSequence"],
    "00F4": ["IS", "ReferencedStartControlPointIndex"],
    "00F6": ["IS", "ReferencedStopControlPointIndex"],
    "0100": ["IS", "ReferencedRangeShifterNumber"],
    "0102": ["IS", "ReferencedLateralSpreadingDeviceNumber"],
    "0104": ["IS", "ReferencedRangeModulatorNumber"]
  },
  "300E": {
    "0002": ["CS", "ApprovalStatus"],
    "0004": ["DA", "ReviewDate"],
    "0005": ["TM", "ReviewTime"],
    "0008": ["PN", "ReviewerName"]
  },
  "4000": {
    "0010": ["LT", "Arbitrary"],
    "4000": ["LT", "TextComments"]
  },
  "4008": {
    "0040": ["SH", "ResultsID"],
    "0042": ["LO", "ResultsIDIssuer"],
    "0050": ["SQ", "ReferencedInterpretationSequence"],
    "00FF": ["CS", "ReportProductionStatusTrial"],
    "0100": ["DA", "InterpretationRecordedDate"],
    "0101": ["TM", "InterpretationRecordedTime"],
    "0102": ["PN", "InterpretationRecorder"],
    "0103": ["LO", "ReferenceToRecordedSound"],
    "0108": ["DA", "InterpretationTranscriptionDate"],
    "0109": ["TM", "InterpretationTranscriptionTime"],
    "010A": ["PN", "InterpretationTranscriber"],
    "010B": ["ST", "InterpretationText"],
    "010C": ["PN", "InterpretationAuthor"],
    "0111": ["SQ", "InterpretationApproverSequence"],
    "0112": ["DA", "InterpretationApprovalDate"],
    "0113": ["TM", "InterpretationApprovalTime"],
    "0114": ["PN", "PhysicianApprovingInterpretation"],
    "0115": ["LT", "InterpretationDiagnosisDescription"],
    "0117": ["SQ", "InterpretationDiagnosisCodeSequence"],
    "0118": ["SQ", "ResultsDistributionListSequence"],
    "0119": ["PN", "DistributionName"],
    "011A": ["LO", "DistributionAddress"],
    "0200": ["SH", "InterpretationID"],
    "0202": ["LO", "InterpretationIDIssuer"],
    "0210": ["CS", "InterpretationTypeID"],
    "0212": ["CS", "InterpretationStatusID"],
    "0300": ["ST", "Impressions"],
    "4000": ["ST", "ResultsComments"]
  },
  "4010": {
    "0001": ["CS", "LowEnergyDetectors"],
    "0002": ["CS", "HighEnergyDetectors"],
    "0004": ["SQ", "DetectorGeometrySequence"],
    "1001": ["SQ", "ThreatROIVoxelSequence"],
    "1004": ["FL", "ThreatROIBase"],
    "1005": ["FL", "ThreatROIExtents"],
    "1006": ["OB", "ThreatROIBitmap"],
    "1007": ["SH", "RouteSegmentID"],
    "1008": ["CS", "GantryType"],
    "1009": ["CS", "OOIOwnerType"],
    "100A": ["SQ", "RouteSegmentSequence"],
    "1010": ["US", "PotentialThreatObjectID"],
    "1011": ["SQ", "ThreatSequence"],
    "1012": ["CS", "ThreatCategory"],
    "1013": ["LT", "ThreatCategoryDescription"],
    "1014": ["CS", "ATDAbilityAssessment"],
    "1015": ["CS", "ATDAssessmentFlag"],
    "1016": ["FL", "ATDAssessmentProbability"],
    "1017": ["FL", "Mass"],
    "1018": ["FL", "Density"],
    "1019": ["FL", "ZEffective"],
    "101A": ["SH", "BoardingPassID"],
    "101B": ["FL", "CenterOfMass"],
    "101C": ["FL", "CenterOfPTO"],
    "101D": ["FL", "BoundingPolygon"],
    "101E": ["SH", "RouteSegmentStartLocationID"],
    "101F": ["SH", "RouteSegmentEndLocationID"],
    "1020": ["CS", "RouteSegmentLocationIDType"],
    "1021": ["CS", "AbortReason"],
    "1023": ["FL", "VolumeOfPTO"],
    "1024": ["CS", "AbortFlag"],
    "1025": ["DT", "RouteSegmentStartTime"],
    "1026": ["DT", "RouteSegmentEndTime"],
    "1027": ["CS", "TDRType"],
    "1028": ["CS", "InternationalRouteSegment"],
    "1029": ["LO", "ThreatDetectionAlgorithmandVersion"],
    "102A": ["SH", "AssignedLocation"],
    "102B": ["DT", "AlarmDecisionTime"],
    "1031": ["CS", "AlarmDecision"],
    "1033": ["US", "NumberOfTotalObjects"],
    "1034": ["US", "NumberOfAlarmObjects"],
    "1037": ["SQ", "PTORepresentationSequence"],
    "1038": ["SQ", "ATDAssessmentSequence"],
    "1039": ["CS", "TIPType"],
    "103A": ["CS", "DICOSVersion"],
    "1041": ["DT", "OOIOwnerCreationTime"],
    "1042": ["CS", "OOIType"],
    "1043": ["FL", "OOISize"],
    "1044": ["CS", "AcquisitionStatus"],
    "1045": ["SQ", "BasisMaterialsCodeSequence"],
    "1046": ["CS", "PhantomType"],
    "1047": ["SQ", "OOIOwnerSequence"],
    "1048": ["CS", "ScanType"],
    "1051": ["LO", "ItineraryID"],
    "1052": ["SH", "ItineraryIDType"],
    "1053": ["LO", "ItineraryIDAssigningAuthority"],
    "1054": ["SH", "RouteID"],
    "1055": ["SH", "RouteIDAssigningAuthority"],
    "1056": ["CS", "InboundArrivalType"],
    "1058": ["SH", "CarrierID"],
    "1059": ["CS", "CarrierIDAssigningAuthority"],
    "1060": ["FL", "SourceOrientation"],
    "1061": ["FL", "SourcePosition"],
    "1062": ["FL", "BeltHeight"],
    "1064": ["SQ", "AlgorithmRoutingCodeSequence"],
    "1067": ["CS", "TransportClassification"],
    "1068": ["LT", "OOITypeDescriptor"],
    "1069": ["FL", "TotalProcessingTime"],
    "106C": ["OB", "DetectorCalibrationData"]
  }
};
/**
 * Returns the VR for the specified group and element.
 * @param {number} group
 * @param {number} element
 * @returns {string}
 */

const getVR = (group, element) => {
  let vr;
  let elementData;
  let groupData;
  groupData = dict[dec2hex(group)];

  if (groupData) {
    elementData = groupData[dec2hex(element)];

    if (elementData) {
      [vr] = elementData;
    } else if (element === 0) {
      vr = "UL";
    }
  }

  if (!vr) {
    groupData = dictPrivate[dec2hex(group)];

    if (groupData) {
      elementData = groupData[dec2hex(element)];

      if (elementData) {
        [vr] = elementData;
      }
    }
  }

  if (!vr) {
    vr = "OB";
  }

  return vr;
};
/**
 * Returns the description for the specified group and element.
 * @param {number} group
 * @param {number} element
 * @returns {string}
 */


const getDescription = (group, element) => {
  let des;
  let elementData;
  let groupData;
  groupData = dict[dec2hex(group)];

  if (groupData) {
    elementData = groupData[dec2hex(element)];

    if (elementData) {
      [, des] = elementData;
    } else if (element === 0) {
      des = `Group ${dec2hex(group)} Length`;
    }
  }

  if (!des) {
    groupData = dictPrivate[dec2hex(group)];

    if (groupData) {
      elementData = groupData[dec2hex(element)];

      if (elementData) {
        [, des] = elementData;
      }
    }
  }

  if (!des) {
    des = "PrivateData";
  }

  return des;
};

var Dictionary = {
  getVR,
  getDescription
};
const CSA2_MAGIC_NUMBER = [83, 86, 49, 48];
const NAME_LENGTH = 64;
const ELEMENT_CSA1 = 0x1010;
const ELEMENT_CSA2 = 0x1020;
const GROUP_CSA = 0x029;
/**
 * The Siemens constructor.
 * @params {ArrayBuffer} buffer
 * @type {Function}
 */

class Siemens {
  constructor(buffer) {
    this.output = void 0;
    this.data = void 0;

    this.canRead = (group, element) => group === GROUP_CSA && (element === ELEMENT_CSA1 || element === ELEMENT_CSA2);

    this.output = "";
    this.data = new DataView(buffer, 0);
  }
  /**
  * Reads the Siemens header.  (See http://nipy.org/nibabel/dicom/siemens_csa.html)
  * @returns {string}
  */


  readHeader() {
    let match;

    try {
      if (this.data.byteLength > CSA2_MAGIC_NUMBER.length) {
        match = true;
        const {
          data
        } = this;

        for (let ctr = 0; ctr < CSA2_MAGIC_NUMBER.length; ctr += 1) {
          match = match && data.getUint8(ctr) === CSA2_MAGIC_NUMBER[ctr];
        }

        if (match) {
          this.readHeaderAtOffset(CSA2_MAGIC_NUMBER.length + 4);
        } else {
          this.readHeaderAtOffset(0);
        }
      }
    } catch (error) {
      console.log(error);
    }

    return this.output;
  }

  readHeaderAtOffset(offset) {
    this.output += "\n";
    const numTags = swap32(this.data.getUint32(offset));

    if (numTags < 1 || numTags > 128) {
      return this.output;
    }

    let newOffset = offset + 4;
    newOffset += 4; // unused

    for (let ctr = 0; ctr < numTags; ctr += 1) {
      newOffset = this.readTag(newOffset);

      if (offset === -1) {
        break;
      }
    }

    return this.output;
  }

  readTag(offset) {
    const name = this.readString(offset, NAME_LENGTH);
    let newOffset = offset + NAME_LENGTH;
    newOffset += 4; // vm

    newOffset += 4;
    newOffset += 4; // syngodt

    const numItems = swap32(this.data.getUint32(offset));
    newOffset += 4;
    newOffset += 4; // unused

    this.output += `    ${name}=`;

    for (let ctr = 0; ctr < numItems; ctr += 1) {
      newOffset = this.readItem(newOffset);

      if (newOffset === -1) {
        break;
      } else if (newOffset % 4 !== 0) {
        newOffset += 4 - newOffset % 4;
      }
    }

    this.output += "\n";
    return offset;
  }

  readString(offset, length) {
    let str = "";

    for (let ctr = 0; ctr < length; ctr += 1) {
      const char2 = this.data.getUint8(offset + ctr);

      if (char2 === 0) {
        break;
      }

      str += String.fromCharCode(char2);
    }

    return str;
  }

  readItem(offset) {
    const itemLength = swap32(this.data.getUint32(offset));

    if (offset + itemLength > this.data.byteLength) {
      return -1;
    }

    const newOffset = offset + 16;

    if (itemLength > 0) {
      this.output += `${this.readString(newOffset, itemLength)} `;
    }

    return newOffset + itemLength;
  }
  /**
   * Returns true if the specified group and element indicate this tag can be read.
   * @param {number} group
   * @param {number} element
   * @returns {boolean}
   */
  // eslint-disable-next-line class-methods-use-this


}

const PRIVATE_DATA_READERS = [Siemens];
const TagIds = {
  // metadata
  TransferSyntax: [0x0002, 0x0010],
  MetaLength: [0x0002, 0x0000],
  // sublists
  SublistItem: [0xFFFE, 0xE000],
  SublistItemDelim: [0xFFFE, 0xE00D],
  SequenceDelim: [0xFFFE, 0xE0DD],
  // image dims
  Rows: [0x0028, 0x0010],
  Cols: [0x0028, 0x0011],
  AcquisitionMatrix: [0x0018, 0x1310],
  NumberOfFrames: [0x0028, 0x0008],
  NumberTemporalPositions: [0x0020, 0x0105],
  // voxel dims
  PixelSpacing: [0x0028, 0x0030],
  SliceThickness: [0x0018, 0x0050],
  SliceGap: [0x0018, 0x0088],
  Tr: [0x0018, 0x0080],
  FrameTime: [0x0018, 0x1063],
  // datatype
  BitsAllocated: [0x0028, 0x0100],
  BitsStored: [0x0028, 0x0101],
  PixelRepresentation: [0x0028, 0x0103],
  PixelPaddingValue: [0x0028, 0x0120],
  HighBit: [0x0028, 0x0102],
  PhotometricInterpretation: [0x0028, 0x0004],
  SamplesPerPixel: [0x0028, 0x0002],
  PlanarConfig: [0x0028, 0x0006],
  PaletteRedDescriptor: [0x0028, 0x1101],
  PaletteRed: [0x0028, 0x1201],
  PaletteGreen: [0x0028, 0x1202],
  PaletteBlue: [0x0028, 0x1203],
  // data scale
  DataScaleSlope: [0x0028, 0x1053],
  DataScaleIntercept: [0x0028, 0x1052],
  DataScaleElscint: [0x0207, 0x101f],
  PixelBandwidth: [0x0018, 0x0095],
  // LUT
  VoiLutSequence: [0x0028, 0x3010],
  VoiLutDescriptor: [0x0028, 0x3002],
  // VoiLutExplanation: [0x0028, 0x3003],
  VoiLutData: [0x0028, 0x3006],
  // range
  ImageMin: [0x0028, 0x0106],
  ImageMax: [0x0028, 0x0107],
  WindowCenter: [0x0028, 0x1050],
  WindowWidth: [0x0028, 0x1051],
  // descriptors
  Charset: [0x0008, 0x0005],
  PatientName: [0x0010, 0x0010],
  PatientId: [0x0010, 0x0020],
  StudyDate: [0x0008, 0x0020],
  StudyTime: [0x0008, 0x0030],
  StudyDes: [0x0008, 0x1030],
  ImageType: [0x0008, 0x0008],
  ImageComments: [0x0020, 0x4000],
  SequenceName: [0x0018, 0x0024],
  Modality: [0x0008, 0x0060],
  // session ID
  FrameOfRefUid: [0x0020, 0x0052],
  // study ID
  StudyUid: [0x0020, 0x000d],
  // volume ID
  SeriesDescription: [0x0008, 0x103e],
  SeriesInstanceUid: [0x0020, 0x000e],
  SeriesNumber: [0x0020, 0x0011],
  EchoNumber: [0x0018, 0x0086],
  TemporalPosition: [0x0020, 0x0100],
  // slice ID
  ImageNum: [0x0020, 0x0013],
  SliceLocation: [0x0020, 0x1041],
  // orientation
  ImageOrientation: [0x0020, 0x0037],
  ImagePosition: [0x0020, 0x0032],
  SliceLocationVector: [0x0018, 0x2005],
  // LUT shape
  LutShape: [0x2050, 0x0020],
  // pixel data
  PixelData: [0x7fe0, 0x0010]
};
/**
 * Create an ID string based on the specified group and element
 * @param {number} group
 * @param {number} element
 * @returns {string}
 */

const createTagId = (group, element) => {
  const groupStr = dec2hex$1(group);
  const elemStr = dec2hex$1(element);
  return groupStr + elemStr;
};

const VRMaxLength = {
  AE: 16,
  AS: 4,
  AT: 4,
  CS: 16,
  DA: 8,
  DS: 16,
  DT: 26,
  FL: 4,
  FD: 8,
  IS: 12,
  LO: 64,
  LT: 10240,
  OB: -1,
  OD: -1,
  OF: -1,
  OW: -1,
  PN: 64 * 5,
  SH: 16,
  SL: 4,
  SS: 2,
  ST: 1024,
  TM: 16,
  UI: 64,
  UL: 4,
  UN: -1,
  US: 2,
  UT: -1
};
/**
 * Create an ID string based on the specified group and element
 * @param {Array} tupple with
 * 		@param {number} group
 * 		@param {number} element
 * @returns {string}
 */

const createTagIdWithTag = ([group, element]) => {
  const groupStr = dec2hex$1(group);
  const elemStr = dec2hex$1(element);
  return groupStr + elemStr;
};

const getUnsignedInteger16 = (rawData, littleEndian) => {
  const data = [];
  const mul = rawData.byteLength / 2;

  for (let ctr = 0; ctr < mul; ctr += 1) {
    data[ctr] = rawData.getUint16(ctr * 2, littleEndian);
  }

  return data;
};

const getSignedInteger16 = (rawData, littleEndian) => {
  const data = [];
  const mul = rawData.byteLength / 2;

  for (let ctr = 0; ctr < mul; ctr += 1) {
    data[ctr] = rawData.getInt16(ctr * 2, littleEndian);
  }

  return data;
};

const getFloat32 = (rawData, littleEndian) => {
  const data = [];
  const mul = rawData.byteLength / 4;

  for (let ctr = 0; ctr < mul; ctr += 1) {
    data[ctr] = rawData.getFloat32(ctr * 4, littleEndian);
  }

  return data;
};

const getSignedInteger32 = (rawData, littleEndian) => {
  const data = [];
  const mul = rawData.byteLength / 4;

  for (let ctr = 0; ctr < mul; ctr += 1) {
    data[ctr] = rawData.getInt32(ctr * 4, littleEndian);
  }

  return data;
};

const getUnsignedInteger32 = (rawData, littleEndian) => {
  const data = [];
  const mul = rawData.byteLength / 4;

  for (let ctr = 0; ctr < mul; ctr += 1) {
    data[ctr] = rawData.getUint32(ctr * 4, littleEndian);
  }

  return data;
};

const getFloat64 = (rawData, littleEndian) => {
  if (rawData.byteLength < 8) {
    return [0];
  }

  const data = [];
  const mul = rawData.byteLength / 8;

  for (let ctr = 0; ctr < mul; ctr += 1) {
    data[ctr] = rawData.getFloat64(ctr * 8, littleEndian);
  }

  return data;
};

const getDoubleElscint = (rawData, littleEndian) => {
  const data = Array(8);

  if (littleEndian) {
    for (let ctr = 0; ctr < 8; ctr += 1) {
      data[ctr] = rawData.getUint8(ctr);
    }
  } else {
    for (let ctr = 0; ctr < 8; ctr += 1) {
      data[ctr] = rawData.getUint8(7 - ctr);
    }
  }

  const reordered = [data[3], data[2], data[1], data[0], data[7], data[6], data[5], data[4]];
  return [bytesToDouble(reordered)];
};

const getFixedLengthStringValue = (rawData, maxLength, charset, vr) => {
  const mul = Math.floor(rawData.byteLength / maxLength);
  const data = Array(mul);

  for (let ctr = 0; ctr < mul; ctr += 1) {
    data[ctr] = getStringAt(rawData, ctr * maxLength, maxLength, charset, vr);
  }

  return data;
};

const getStringValue = (rawData, charset, vr) => {
  const data = getStringAt(rawData, 0, rawData.byteLength, charset, vr).split("\\");

  for (let ctr = 0; ctr < data.length; ctr += 1) {
    data[ctr] = data[ctr].trim();
  }

  return data;
};

const getSingleStringValue = (rawData, maxLength = 0, charset = undefined, vr = undefined) => {
  const len = Math.min(rawData.byteLength, maxLength);
  return [getStringAt(rawData, 0, len, charset, vr).trim()];
};

const getDateStringValue = rawData => {
  const dotFormat = getSingleStringValue(rawData)[0].indexOf(".") !== -1;
  const stringData = getFixedLengthStringValue(rawData, dotFormat ? 10 : VRMaxLength.DA);
  let parts = null;
  const data = [];

  for (let ctr = 0; ctr < stringData.length; ctr += 1) {
    if (dotFormat) {
      parts = stringData[ctr].split(".");

      if (parts.length === 3) {
        data[ctr] = new Date(safeParseInt(parts[0]), safeParseInt(parts[1]) - 1, safeParseInt(parts[2]));
      } else {
        data[ctr] = new Date();
      }
    } else if (stringData[ctr].length === 8) {
      data[ctr] = new Date(safeParseInt(stringData[ctr].substring(0, 4)), safeParseInt(stringData[ctr].substring(4, 6)) - 1, safeParseInt(stringData[ctr].substring(6, 8)));
    } else {
      data[ctr] = Date.parse(stringData[ctr]);
    }

    if (!isValidDate(data[ctr])) {
      data[ctr] = stringData[ctr];
    }
  }

  return data;
};

const getDateTimeStringValue = rawData => {
  const stringData = getStringValue(rawData);
  const data = [];
  let year = 0;
  let month = 0;
  let date = 0;
  let hours = 0;
  let minutes = 0;
  let seconds = 0;

  for (let ctr = 0; ctr < stringData.length; ctr += 1) {
    const str = stringData[ctr];
    const strLen = str.length;

    if (strLen >= 4) {
      year = parseInt(str.substring(0, 4), 10); // required

      if (strLen >= 6) {
        month = safeParseInt(str.substring(4, 6)) - 1;
      }

      if (strLen >= 8) {
        date = safeParseInt(str.substring(6, 8));
      }

      if (strLen >= 10) {
        hours = safeParseInt(str.substring(8, 10));
      }

      if (strLen >= 12) {
        minutes = safeParseInt(str.substring(10, 12));
      }

      if (strLen >= 14) {
        seconds = safeParseInt(str.substring(12, 14));
      }

      data[ctr] = new Date(year, month, date, hours, minutes, seconds);
    } else {
      data[ctr] = Date.parse(str);
    }

    if (!isValidDate(data[ctr])) {
      data[ctr] = str;
    }
  }

  return data;
};

const getTimeStringValue = (rawData, ms = false) => {
  const stringData = getStringValue(rawData);
  const data = [];

  if (ms) {
    let parts = null;
    let hours = 0;
    let minutes = 0;
    let seconds = 0;

    for (let ctr = 0; ctr < stringData.length; ctr += 1) {
      if (stringData[ctr].indexOf(":") !== -1) {
        parts = stringData[ctr].split(":");
        hours = safeParseInt(parts[0]);

        if (parts.length > 1) {
          minutes = safeParseInt(parts[1]);
        }

        if (parts.length > 2) {
          seconds = safeParseFloat(parts[2]);
        }
      } else {
        if (stringData[ctr].length >= 2) {
          hours = safeParseInt(stringData[ctr].substring(0, 2));
        }

        if (stringData[ctr].length >= 4) {
          minutes = safeParseInt(stringData[ctr].substring(2, 4));
        }

        if (stringData[ctr].length >= 6) {
          seconds = safeParseFloat(stringData[ctr].substring(4));
        }
      }

      data[ctr] = Math.round(hours * 60 * 60 * 1000 + minutes * 60 * 1000 + seconds * 1000);
    }

    return data;
  }

  return stringData;
};

const getDoubleStringValue = rawData => {
  const stringData = getStringValue(rawData);
  const data = [];

  for (let ctr = 0; ctr < stringData.length; ctr += 1) {
    data[ctr] = parseFloat(stringData[ctr]);
  }

  return data;
};

const getIntegerStringValue = rawData => {
  const stringData = getStringValue(rawData);
  const data = [];

  for (let ctr = 0; ctr < stringData.length; ctr += 1) {
    data[ctr] = parseInt(stringData[ctr], 10);
  }

  return data;
};

const getPersonNameStringValue = (rawData, charset, vr) => {
  const stringData = getStringValue(rawData, charset, vr);
  const data = Array(stringData.length);

  for (let ctr = 0; ctr < stringData.length; ctr += 1) {
    data[ctr] = stringData[ctr].replace("^", " ");
  }

  return data;
};

const convertPrivateValue = (group, element, rawData) => {
  let privReader;

  for (let ctr = 0; ctr < PRIVATE_DATA_READERS.length; ctr += 1) {
    privReader = new PRIVATE_DATA_READERS[ctr](rawData.buffer);

    if (privReader.canRead(group, element)) {
      return privReader.readHeader();
    }
  }

  return rawData;
};

const convertValue = (vr, rawData, littleEndian, charset) => {
  let data = null; // http://dicom.nema.org/dicom/2013/output/chtml/part05/sect_6.2.html

  switch (vr) {
    case "AE":
      data = getSingleStringValue(rawData, VRMaxLength.AE);
      break;

    case "AS":
      data = getFixedLengthStringValue(rawData, VRMaxLength.AS);
      break;

    case "AT":
      data = getUnsignedInteger16(rawData, littleEndian);
      break;

    case "CS":
      data = getStringValue(rawData);
      break;

    case "DA":
      data = getDateStringValue(rawData);
      break;

    case "DS":
      data = getDoubleStringValue(rawData);
      break;

    case "DT":
      data = getDateTimeStringValue(rawData);
      break;

    case "FL":
      data = getFloat32(rawData, littleEndian);
      break;

    case "FD":
      data = getFloat64(rawData, littleEndian);
      break;

    case "FE":
      data = getDoubleElscint(rawData, littleEndian);
      break;

    case "IS":
      data = getIntegerStringValue(rawData);
      break;

    case "LO":
      data = getStringValue(rawData, charset, vr);
      break;

    case "LT":
      data = getSingleStringValue(rawData, VRMaxLength.AT);
      break;

    case "OB":
    case "OD":
    case "OF":
    case "OW":
      data = rawData;
      break;

    case "PN":
      data = getPersonNameStringValue(rawData, charset, vr);
      break;

    case "SH":
      data = getStringValue(rawData, charset, vr);
      break;

    case "SL":
      data = getSignedInteger32(rawData, littleEndian);
      break;

    case "SQ":
      data = null;
      break;

    case "SS":
      data = getSignedInteger16(rawData, littleEndian);
      break;

    case "ST":
      data = getSingleStringValue(rawData, VRMaxLength.ST);
      break;

    case "TM":
      data = getTimeStringValue(rawData);
      break;

    case "UI":
      data = getStringValue(rawData);
      break;

    case "UL":
      data = getUnsignedInteger32(rawData, littleEndian);
      break;

    case "UN":
      data = rawData;
      break;

    case "US":
      data = getUnsignedInteger16(rawData, littleEndian);
      break;

    case "UT":
      data = getSingleStringValue(rawData, Number.MAX_SAFE_INTEGER, charset, vr);
      break;
  }

  return data;
};

class Tag {
  static isEqual({
    group,
    element
  }, tagId) {
    return group === tagId[0] && element === tagId[1];
  }
  /**
   * The Tag constuctor.
   * @property {number} group
   * @property {number} element
   * @property {string} vr
   * @property {number} offsetStart
   * @property {number} offsetValue
   * @property {number} offsetEnd
   * @property {boolean} sublist - true if this tag is a sublist
   * @property {number|number[]|string|string[]|object} value
   * @type {Function}
   */


  constructor({
    group,
    element,
    vr = null,
    value = null,
    offsetStart = null,
    offsetValue = null,
    offsetEnd = null,
    littleEndian = true,
    charset = null
  }) {
    this.id = void 0;
    this.group = void 0;
    this.element = void 0;
    this.vr = void 0;
    this.rawValue = void 0;
    this.convertedValue = void 0;
    this.offsetStart = void 0;
    this.offsetValue = void 0;
    this.offsetEnd = void 0;
    this.sublist = void 0;
    this.preformatted = void 0;
    this.littleEndian = void 0;
    this.charset = void 0;
    this.group = group;
    this.element = element;
    this.vr = vr;
    this.offsetStart = offsetStart;
    this.offsetValue = offsetValue;
    this.offsetEnd = offsetEnd;
    this.sublist = false;
    this.preformatted = false;
    this.id = createTagId(group, element);
    this.littleEndian = littleEndian;
    this.charset = charset;
    this.rawValue = value;

    if (value instanceof Array) {
      this.sublist = true;
      this.rawValue = value;
      this.convertedValue = value;
    }
  }

  hasValue() {
    return this.rawValue !== null;
  }

  get value() {
    // oonly convert value if needed
    return this.convertedValue || this.getConvertedValue();
  }

  getConvertedValue() {
    if (this.rawValue === null) {
      return null;
    }

    const {
      rawValue,
      vr,
      littleEndian,
      charset,
      group,
      element
    } = this;
    const dv = rawValue;
    let convertedValue = convertValue(vr, dv, littleEndian, charset);

    if (convertedValue === dv && this.isPrivateData()) {
      convertedValue = convertPrivateValue(group, element, dv);
      this.preformatted = convertedValue !== dv;
    }

    this.convertedValue = convertedValue;
    return convertedValue;
  }
  /**
   * Returns true if this is the transform syntax tag.
   * @returns {boolean}
   */


  is([group, element]) {
    return this.group === group && this.element === element;
  }
  /**
   * Returns true if this tag contains private data.
   * @returns {boolean}
   */


  isPrivateData() {
    /* eslint-disable no-bitwise */
    return (this.group & 1) === 1;
  }
  /**
   * Returns true if this tag contains private data that can be read.
   * @returns {boolean}
   */


  hasInterpretedPrivateData() {
    return this.isPrivateData() && isString(this.value);
  }
  /**
   * Returns a string representation of this tag.
   * @param {number} [level] - the indentation level
   * @param {boolean} [html]
   * @returns {string}
   */


  toString(level = 0, html = false) {
    let valueStr = "";
    const groupStr = dec2hex$1(this.group);
    const elemStr = dec2hex$1(this.element);
    let tagStr = `(${groupStr},${elemStr})`;
    let des = "";
    let padding;
    padding = "";

    for (let ctr = 0; ctr < level; ctr += 1) {
      if (html) {
        padding += "&nbsp;&nbsp;";
      } else {
        padding += "  ";
      }
    }

    if (this.sublist) {
      const value = this.value;

      for (let ctr = 0; ctr < value.length; ctr += 1) {
        const tag = value[ctr];
        valueStr += `\n${tag.toString(level + 1, html)}`;
      }
    } else if (this.vr === "SQ" || this.is(TagIds.PixelData) || !this.value) {
      valueStr = "";
    } else if (html && this.preformatted) {
      valueStr = `[<pre>${this.value}</pre>]`;
    } else {
      valueStr = `[${this.value}]`;
    }

    if (this.is(TagIds.SublistItem)) {
      tagStr = "Sequence Item";
    } else if (this.is(TagIds.SublistItemDelim)) {
      tagStr = "Sequence Item Delimiter";
    } else if (this.is(TagIds.SequenceDelim)) {
      tagStr = "Sequence Delimiter";
    } else if (this.is(TagIds.PixelData)) {
      tagStr = "Pixel Data";
    } else {
      des = convertCamcelCaseToTitleCase(Dictionary.getDescription(this.group, this.element));
    }

    if (html) {
      return `${padding}<span style='color:#B5CBD3'>${tagStr}</span>&nbsp;&nbsp;&nbsp;${des}&nbsp;&nbsp;&nbsp;${valueStr}`;
    }

    return `${padding} ${tagStr} ${des} ${valueStr}`;
  }
  /**
   * Returns an HTML string representation of this tag.
   * @param {number} level - the indentation level
   * @returns {string}
   */


  toHTMLString(level = 0) {
    return this.toString(level, true);
  } // for test, ignore any ptotocol changes etc


  toObject() {
    const {
      id,
      group,
      element,
      vr,
      value,
      offsetStart,
      offsetValue,
      offsetEnd,
      sublist,
      preformatted
    } = this;
    return {
      id,
      group,
      element,
      vr,
      value,
      offsetStart,
      offsetValue,
      offsetEnd,
      sublist,
      preformatted
    };
  }

}

const lutInfoFromImage = image => {
  const lutDescriptor = image.getTagValue(TagIds.VoiLutDescriptor);

  if ((lutDescriptor === null || lutDescriptor === void 0 ? void 0 : lutDescriptor.length) !== 3) {
    return null;
  }

  const [nEntries, firstValue, bitsStored] = lutDescriptor;

  if (nEntries === 0 || nEntries >= 2 ** bitsStored - 1) {
    return null;
  }

  let ArrayType = Uint8Array;

  if (bitsStored > 8) {
    ArrayType = Uint16Array;
  }

  const lutDataTagValue = image.getTagValue(TagIds.VoiLutData);

  if (!lutDataTagValue) {
    return null;
  }

  const data = new ArrayType(lutDataTagValue, 0, Math.min(lutDescriptor[0] || 2 ** 16, lutDataTagValue.length));
  return {
    nEntries,
    firstValue,
    bitsStored,
    data
  };
};

const paletteInfoFromImage = info => {
  const {
    image
  } = info;
  const reds = image.getTagValue(TagIds.PaletteRed);
  const greens = image.getTagValue(TagIds.PaletteGreen);
  const blues = image.getTagValue(TagIds.PaletteBlue);

  if ((reds === null || reds === void 0 ? void 0 : reds.byteLength) > 0 && (greens === null || greens === void 0 ? void 0 : greens.byteLength) > 0 && (blues === null || blues === void 0 ? void 0 : blues.byteLength) > 0) {
    const paletteInfo = image.getTagValue(TagIds.PaletteRedDescriptor);
    const [nEntries,, bitsAllocated] = paletteInfo;
    return {
      nEntries,
      bitsAllocated,
      r: reds,
      g: greens,
      b: blues
    };
  }

  return null;
};

const displayInfoFromDecoderInfo = info => {
  const {
    image
  } = info;
  let invert = image.getTagValueIndexed(TagIds.LutShape) === "inverse";
  invert = invert || image.photometricInterpretation === "MONOCHROME1";

  const displayInfo = _extends({}, info, {
    nFrames: image.numberOfFrames || 1,
    pixelPaddingVal: image.pixelPaddingValue,
    lut: lutInfoFromImage(info.image),
    palette: paletteInfoFromImage(info),
    minPixVal: image.imageMin,
    maxPixVal: image.imageMax,
    windowCenter: image.windowCenter,
    windowWidth: image.windowWidth,
    slope: image.dataScaleSlope || 1.0,
    intercept: image.dataScaleIntercept || 0.0,
    invert
  });

  return displayInfo;
};

class FrameInfo {
  constructor(info) {
    this.frameNo = void 0;
    this.imageInfo = void 0;
    this.texture = void 0;
    this.gl = void 0;
    this.imageInfo = info.imageInfo;
    this.frameNo = info.frameNo;
    this.texture = info.texture;
    this.gl = info.gl;
  }

  destroy() {
    this.gl.deleteTexture(this.texture);
  }

}

class Decoder {
  constructor(image) {
    this.image = void 0;
    this.outputSize = void 0;
    this.image = displayInfoFromDecoderInfo(image);
    this.outputSize = image.size;
  }

  async getFrame(gl, frameNo) {
    const texture = await this.createTexture(gl, frameNo);
    return new FrameInfo({
      imageInfo: this.image,
      frameNo,
      gl,
      texture
    });
  } // eslint-disable-next-line @typescript-eslint/no-unused-vars


  decode(frameNo) {
    const {
      data,
      nFrames
    } = this.image;
    const bytesPerFrame = data.byteLength / nFrames;
    const dv = new DataView(data.buffer, data.byteOffset + bytesPerFrame * frameNo, bytesPerFrame);
    return Promise.resolve(dv);
  }

  async createTexture(gl, frameNo) {
    const pixelData = await this.decode(frameNo);
    const buffer = new Uint8Array(pixelData.buffer, pixelData.byteOffset, pixelData.byteLength);
    let {
      height
    } = this.outputSize;
    const {
      width
    } = this.outputSize;
    const {
      image
    } = this;
    let format = gl.LUMINANCE_ALPHA;
    let internalFormat = gl.LUMINANCE_ALPHA;

    if (image.rgb && !image.planar && !image.palette) {
      format = gl.RGB;
      internalFormat = gl.RGB;
    } else if (image.bytesAllocated === 1) {
      format = gl.LUMINANCE;
      internalFormat = gl.LUMINANCE;
    }

    if (image.planar) {
      height *= image.samples;
    }

    return Promise.resolve(twgl.createTexture(gl, {
      src: buffer,
      width,
      height,
      format,
      internalFormat,
      type: gl.UNSIGNED_BYTE,
      min: gl.NEAREST,
      mag: gl.NEAREST,
      wrap: gl.CLAMP_TO_EDGE
    }));
  }

}

const getSingleValueSafely = (tag, index) => {
  var _tag$value;

  return (tag === null || tag === void 0 ? void 0 : (_tag$value = tag.value) === null || _tag$value === void 0 ? void 0 : _tag$value[index]) || null;
};

const getValueSafely = tag => {
  var _tag$value2;

  return (_tag$value2 = tag === null || tag === void 0 ? void 0 : tag.value) !== null && _tag$value2 !== void 0 ? _tag$value2 : null;
};

var Axis;

(function (Axis) {
  Axis["R"] = "R";
  Axis["L"] = "L";
  Axis["A"] = "A";
  Axis["P"] = "P";
  Axis["F"] = "F";
  Axis["H"] = "H";
})(Axis || (Axis = {})); // originally from: http://public.kitware.com/pipermail/insight-users/2005-March/012246.html


const ObliquityThresholdCosineValue = 0.8;

const getMajorAxisFromPatientRelativeDirectionCosine = (x, y, z) => {
  const absX = Math.abs(x);
  const absY = Math.abs(y);
  const absZ = Math.abs(z); // The tests here really don't need to check the other dimensions,
  // just the threshold, since the sum of the squares should be == 1.0
  // but just in case ...

  let axis = null;

  if (absX > ObliquityThresholdCosineValue && absX > absY && absX > absZ) {
    const orientationX = x < 0 ? Axis.R : Axis.L;
    axis = orientationX;
  } else if (absY > ObliquityThresholdCosineValue && absY > absX && absY > absZ) {
    const orientationY = y < 0 ? Axis.A : Axis.P;
    axis = orientationY;
  } else if (absZ > ObliquityThresholdCosineValue && absZ > absX && absZ > absY) {
    const orientationZ = z < 0 ? Axis.F : Axis.H;
    axis = orientationZ;
  }

  return axis;
};

class DCMImage {
  constructor() {
    this.tags = {};
    this.tagsFlat = {};
    this.littleEndian = false;
    this.index = -1;
    this.decompressed = false;
    this.privateDataAll = null;
    this.bytesAllocated = null;
  }
  /**
   * Returns a tag matching the specified group and element tuple
   * @param {TagTupleID} tag - Tuple of group & elem like TagIds values
   * @returns
   */


  getTag(tag) {
    var _this$tags$tagId;

    const [group, element] = tag;
    const tagId = createTagId(group, element);
    return (_this$tags$tagId = this.tags[tagId]) !== null && _this$tags$tagId !== void 0 ? _this$tags$tagId : this.tagsFlat[tagId];
  }
  /**
   * Returns a tag matching the specified group and element tuple ignoring tagsFlat
   * @param {TagTupleID} tag - Tuple of group & elem like TagIds values
   * @returns
   */


  getTopLevelTag(tag) {
    const [group, element] = tag;
    const tagId = createTagId(group, element);
    return this.tags[tagId];
  }
  /**
   * get the value of the tag if exists
   * @param {TagTupleID} tag tuple of group and element ids
   * @returns the value of the tag or null if not exist
   */


  getTagValue(tag) {
    return getValueSafely(this.getTag(tag));
  }
  /**
   * get the value of the tag if exists
   * @param {TagTupleID} tag tuple of group and element ids
   * @param {Number} index the position in the value
   * @returns the value at index or null if not exist
   */


  getTagValueIndexed(tag, index = 0) {
    return getSingleValueSafely(this.getTag(tag), index);
  }
  /**
   * Returns the pixel data tag.
   * @returns {Tag}
   */


  get pixelData() {
    return this.tags[createTagIdWithTag(TagIds.PixelData)];
  }
  /**
   * Returns the number of columns.
   * @returns {number}
   */


  get columns() {
    return this.getTagValueIndexed(TagIds.Cols);
  }
  /**
   * Returns the number of rows.
   * @returns {number}
   */


  get rows() {
    return this.getTagValueIndexed(TagIds.Rows);
  }
  /**
   * Returns the series description.
   * @returns {string}
   */


  get seriesDescription() {
    return this.getTagValueIndexed(TagIds.SeriesDescription);
  }
  /**
   * Returns the series instance UID.
   * @returns {string}
   */


  get seriesInstanceUID() {
    return this.getTagValueIndexed(TagIds.SeriesInstanceUid);
  }
  /**
   * Returns the series number.
   * @returns {number}
   */


  get seriesNumber() {
    return this.getTagValueIndexed(TagIds.SeriesNumber);
  }
  /**
   * Returns the echo number.
   * @returns {number}
   */


  get echoNumber() {
    return this.getTagValueIndexed(TagIds.EchoNumber);
  }
  /**
   * Returns the image position.
   * @return {number[]}
   */


  get imagePosition() {
    return this.getTagValue(TagIds.ImagePosition);
  }
  /**
   * Returns the image axis directions
   * @return {number[]}
   */


  get imageDirections() {
    return this.getTagValue(TagIds.ImageOrientation);
  }
  /**
   * Returns the image position value by index.
   * @param {number} sliceDir - the index
   * @returns {number}
   */


  getImagePositionSliceDir(sliceDir) {
    const imagePos = this.imagePosition;

    if (imagePos && sliceDir >= 0) {
      return imagePos[sliceDir];
    }

    return 0;
  }
  /**
   * Returns the modality
   * @returns {string}
   */


  get modality() {
    return this.getTagValueIndexed(TagIds.Modality);
  }
  /**
   * Returns the slice location.
   * @returns {number}
   */


  get sliceLocation() {
    return this.getTagValueIndexed(TagIds.SliceLocation);
  }
  /**
   * Returns the slice location vector.
   * @returns {number[]}
   */


  get sliceLocationVector() {
    return this.getTagValue(TagIds.SliceLocationVector);
  }
  /**
   * Returns the image number.
   * @returns {number}
   */


  get imageNumber() {
    return this.getTagValueIndexed(TagIds.ImageNum);
  }
  /**
   * Returns the temporal position.
   * @returns {number}
   */


  get temporalPosition() {
    return this.getTagValueIndexed(TagIds.TemporalPosition);
  }
  /**
   * Returns the temporal number.
   * @returns {number}
   */


  get temporalNumber() {
    return this.getTagValueIndexed(TagIds.NumberTemporalPositions);
  }
  /**
   * Returns the slice gap.
   * @returns {number}
   */


  get sliceGap() {
    return this.getTagValueIndexed(TagIds.SliceGap);
  }
  /**
   * Returns the slice thickness.
   * @returns {number}
   */


  get sliceThickness() {
    return this.getTagValueIndexed(TagIds.SliceThickness);
  }
  /**
   * Returns the image maximum.
   * @returns {number}
   */


  get imageMax() {
    return this.getTagValueIndexed(TagIds.ImageMax);
  }
  /**
   * Returns the image minimum.
   * @returns {number}
   */


  get imageMin() {
    return this.getTagValueIndexed(TagIds.ImageMin);
  }
  /**
   * Returns the rescale slope.
   * @returns {number}
   */


  get dataScaleSlope() {
    return this.getTagValueIndexed(TagIds.DataScaleSlope);
  }
  /**
   * Returns the rescale intercept.
   * @returns {number}
   */


  get dataScaleIntercept() {
    return this.getTagValueIndexed(TagIds.DataScaleIntercept);
  }

  get dataScaleElscint() {
    let scale = this.getTagValueIndexed(TagIds.DataScaleElscint) || 1;
    const bandwidth = this.pixelBandwidth;
    scale = Math.sqrt(bandwidth) / (10 * scale);

    if (scale <= 0) {
      scale = 1;
    }

    return scale;
  }
  /**
   * Returns the window width (from top level as frame data can have these values)
   * @returns {number}
   */


  get windowWidth() {
    var _this$getTopLevelTag;

    const tagVal = (_this$getTopLevelTag = this.getTopLevelTag(TagIds.WindowWidth)) === null || _this$getTopLevelTag === void 0 ? void 0 : _this$getTopLevelTag.value;
    return tagVal === null || tagVal === void 0 ? void 0 : tagVal[0];
  }
  /**
   * Returns the window center (from top level as frame data can have these values)
   * @returns {number}
   */


  get windowCenter() {
    var _this$getTopLevelTag2;

    const tagVal = (_this$getTopLevelTag2 = this.getTopLevelTag(TagIds.WindowCenter)) === null || _this$getTopLevelTag2 === void 0 ? void 0 : _this$getTopLevelTag2.value;
    return tagVal === null || tagVal === void 0 ? void 0 : tagVal[0];
  }

  get pixelBandwidth() {
    return this.getTagValueIndexed(TagIds.PixelBandwidth);
  }

  get seriesId() {
    const ids = [this.seriesDescription, this.seriesInstanceUID, this.seriesNumber, this.echoNumber, this.orientation].filter(id => id != null); // remove nulls

    const {
      columns,
      rows
    } = this;
    return `${ids.join(",")} (${columns} x ${rows})`;
  }
  /**
   * Returns the pixel spacing.
   * @returns {number[]}
   */


  get pixelSpacing() {
    return this.getTagValue(TagIds.PixelSpacing);
  }
  /**
   * Returns the image type.
   * @returns {string[]}
   */


  get imageType() {
    return this.getTagValue(TagIds.ImageType);
  }
  /**
   * Returns the number of bits stored.
   * @returns {number}
   */


  get bitsStored() {
    return this.getTagValueIndexed(TagIds.BitsStored);
  }
  /**
   * Returns the number of bits allocated.
   * @returns {number}
   */


  get bitsAllocated() {
    return this.getTagValueIndexed(TagIds.BitsAllocated);
  }
  /**
   * Returns the frame time.
   * @returns {number}
   */


  getFrameTime() {
    return this.getTagValueIndexed(TagIds.FrameTime);
  }
  /**
   * Returns the acquisition matrix (e.g., "mosaic" data).
   * @returns {number[]}
   */


  getAcquisitionMatrix() {
    var _this$privateDataAll;

    const mat = [0, 0];
    mat[0] = this.getTagValueIndexed(TagIds.AcquisitionMatrix);

    if (this.privateDataAll === null) {
      this.privateDataAll = this.allInterpretedPrivateData;
    }

    if (((_this$privateDataAll = this.privateDataAll) === null || _this$privateDataAll === void 0 ? void 0 : _this$privateDataAll.length) > 0) {
      const start = this.privateDataAll.indexOf("AcquisitionMatrixText");

      if (start !== -1) {
        const end = this.privateDataAll.indexOf("\n", start);

        if (end !== -1) {
          var _matPrivate$length;

          const str = this.privateDataAll.substring(start, end);
          const matPrivate = str.match(/\d+/g);

          if ((_matPrivate$length = matPrivate === null || matPrivate === void 0 ? void 0 : matPrivate.length) !== null && _matPrivate$length !== void 0 ? _matPrivate$length : 0 >= 1) {
            mat[0] = parseFloat(matPrivate[0]);

            if ((matPrivate === null || matPrivate === void 0 ? void 0 : matPrivate.length) === 2) {
              mat[1] = parseFloat(matPrivate[1]);
            }
          }
        }
      }
    }

    if (mat[1] === 0) {
      [mat[1]] = mat;
    }

    return mat;
  }
  /**
   * Returns the TR.
   * @returns {number}
   */


  getTR() {
    return this.getTagValueIndexed(TagIds.Tr);
  }

  putTag(tag) {
    this.tags[tag.id] = tag;
    this.putFlattenedTag(this.tagsFlat, tag);
  }

  putFlattenedTag(tags, tag) {
    if (tag.sublist) {
      const value = tag.value;

      for (let ctr = 0; ctr < value.length; ctr += 1) {
        this.putFlattenedTag(tags, value[ctr]);
      }
    } else if (!tags[tag.id]) {
      // eslint-disable-next-line no-param-reassign
      tags[tag.id] = tag;
    }
  }
  /**
   * Returns true if pixel data is found.
   * @returns {boolean}
   */


  hasPixelData() {
    return this.tags[createTagIdWithTag(TagIds.PixelData)] !== undefined;
  }
  /**
   * Returns an orientation string (e.g., XYZ+--).
   * @returns {string}
   */


  get orientation() {
    let orientation = null;
    const dirCos = this.getTagValue(TagIds.ImageOrientation);
    let bigRow = 0;
    let bigCol = 0;

    if ((dirCos === null || dirCos === void 0 ? void 0 : dirCos.length) !== 6) {
      return null;
    }

    const spacing = this.pixelSpacing;

    if (!spacing) {
      return null;
    }

    const [rowSpacing] = spacing;
    let biggest = 0;
    let ctr = 0;

    for (; ctr < 3; ctr += 1) {
      if (Math.abs(dirCos[ctr]) > biggest) {
        biggest = Math.abs(dirCos[ctr]);
        bigRow = ctr;
      }
    }

    biggest = 0;

    for (; ctr < 6; ctr += 1) {
      if (Math.abs(dirCos[ctr]) > biggest) {
        biggest = Math.abs(dirCos[ctr]);
        bigCol = ctr;
      }
    }

    let orient = "";

    switch (bigRow) {
      case 0:
        orient += "X";

        if (bigCol === 4) {
          orient += "YZ";
        } else {
          orient += "ZY";
        }

        break;

      case 1:
        orient += "Y";

        if (bigCol === 3) {
          orient += "XZ";
        } else {
          orient += "ZX";
        }

        break;

      case 2:
        orient += "Z";

        if (bigCol === 3) {
          orient += "XY";
        } else {
          orient += "YX";
        }

        break;
    }

    switch (bigRow) {
      case 0:
        if (dirCos[bigRow] > 0.0) {
          orient += "-";
        } else {
          orient += "+";
        }

        if (bigCol === 4) {
          if (dirCos[bigCol] > 0.0) {
            orient += "-";
          } else {
            orient += "+";
          }
        } else if (dirCos[bigCol] > 0.0) {
          orient += "+";
        } else {
          orient += "-";
        }

        break;

      case 1:
        if (dirCos[bigRow] > 0.0) {
          orient += "-";
        } else {
          orient += "+";
        }

        if (bigCol === 3) {
          if (dirCos[bigCol] > 0.0) {
            orient += "-";
          } else {
            orient += "+";
          }
        } else if (dirCos[bigCol] > 0.0) {
          orient += "+";
        } else {
          orient += "-";
        }

        break;

      case 2:
        if (dirCos[bigRow] > 0.0) {
          orient += "+";
        } else {
          orient += "-";
        } // Has to be X or Y so opposite senses


        if (dirCos[bigCol] > 0.0) {
          orient += "-";
        } else {
          orient += "+";
        }

        break;
    }

    if (rowSpacing === 0.0) {
      orient += "+";
      orientation = orient;
    } else {
      {
        switch (orient.charAt(2)) {
          case "X":
            if (rowSpacing > 0.0) {
              orient += "-";
            } else {
              orient += "+";
            }

            break;

          case "Y":
          case "Z":
            if (rowSpacing > 0.0) {
              orient += "+";
            } else {
              orient += "-";
            }

            break;
        }
      }
      orientation = orient;
    }

    return orientation;
  }
  /**
   * Returns true if this image is "mosaic".
   * @returns {boolean}
   */


  isMosaic() {
    const {
      imageType
    } = this;
    let labeledAsMosaic = false;

    if (imageType !== null) {
      for (let ctr = 0; ctr < imageType.length; ctr += 1) {
        if (imageType[ctr].toUpperCase().indexOf("MOSAIC") !== -1) {
          labeledAsMosaic = true;
          break;
        }
      }
    }

    if (!labeledAsMosaic) {
      return false;
    }

    const [matHeight, matWidth] = this.getAcquisitionMatrix();
    const canReadAsMosaic = matHeight > 0 && (matHeight < this.rows || matWidth < this.columns);
    return canReadAsMosaic;
  }
  /**
   * Returns true if this image uses palette colors.
   * @returns {boolean}
   */


  isPalette() {
    const value = this.getTagValueIndexed(TagIds.PhotometricInterpretation);
    return value != null && value.toLowerCase().indexOf("palette") !== -1;
  }

  get mosaicCols() {
    return this.columns / this.getAcquisitionMatrix()[1];
  }

  get mosaicRows() {
    return this.rows / this.getAcquisitionMatrix()[0];
  }

  isElscint() {
    const tag = this.getTag(TagIds.DataScaleElscint);
    return tag !== undefined;
  }
  /**
   * Returns true if this image stores compressed data.
   * @returns {boolean}
   */


  isCompressed() {
    const {
      transferSyntax
    } = this;

    if (transferSyntax) {
      if (transferSyntax.indexOf(TransferSyntax.CompressionJpeg) !== -1) {
        return true;
      }

      if (transferSyntax.indexOf(TransferSyntax.CompressionRLE) !== -1) {
        return true;
      }
    }

    return false;
  }
  /**
   * Returns true if this image stores JPEG data.
   * @returns {boolean}
   */


  isCompressedJPEG() {
    const {
      transferSyntax
    } = this;

    if (transferSyntax) {
      if (transferSyntax.indexOf(TransferSyntax.CompressionJpeg) !== -1) {
        return true;
      }
    }

    return false;
  }
  /**
   * Returns true of this image stores lossless JPEG data.
   * @returns {boolean}
   */


  isCompressedJPEGLossless() {
    const {
      transferSyntax
    } = this;

    if (transferSyntax) {
      if (transferSyntax.indexOf(TransferSyntax.CompressionJpegLossless) !== -1 || transferSyntax.indexOf(TransferSyntax.CompressionJpegLosslessSel1) !== -1) {
        return true;
      }
    }

    return false;
  }
  /**
   * Returns true if this image stores baseline JPEG data.
   * @returns {boolean}
   */


  isCompressedJPEGBaseline() {
    const {
      transferSyntax
    } = this;

    if (transferSyntax) {
      if (transferSyntax.indexOf(TransferSyntax.CompressionJpegBaseline8bit) !== -1 || transferSyntax.indexOf(TransferSyntax.CompressionJpegBaseline12bit) !== -1) {
        return true;
      }
    }

    return false;
  }
  /**
   * Returns true if this image stores JPEG2000 data.
   * @returns {boolean}
   */


  isCompressedJPEG2000() {
    const {
      transferSyntax
    } = this;

    if (transferSyntax) {
      if (transferSyntax.indexOf(TransferSyntax.CompressionJpeg2000) !== -1 || transferSyntax.indexOf(TransferSyntax.CompressionJpeg2000Lossless) !== -1) {
        return true;
      }
    }

    return false;
  }
  /**
   * Returns true if this image stores JPEG-LS data.
   * @returns {boolean}
   */


  isCompressedJPEGLS() {
    const {
      transferSyntax
    } = this;

    if (transferSyntax) {
      if (transferSyntax.indexOf(TransferSyntax.CompressionJpegLs) !== -1 || transferSyntax.indexOf(TransferSyntax.CompressionJpegLsLossless) !== -1) {
        return true;
      }
    }

    return false;
  }
  /**
   * Returns true if this image stores RLE data.
   * @returns {boolean}
   */


  isCompressedRLE() {
    const {
      transferSyntax
    } = this;

    if (transferSyntax) {
      if (transferSyntax.indexOf(TransferSyntax.CompressionRLE) !== -1) {
        return true;
      }
    }

    return false;
  }
  /**
   * Returns the number of frames.
   * @returns {number}
   */


  get numberOfFrames() {
    const value = this.getTagValueIndexed(TagIds.NumberOfFrames);
    return value !== null && value !== void 0 ? value : 1;
  }
  /**
   * Returns the number of samples per pixel.
   * @returns {number}
   */


  get samplesPerPixel() {
    const value = this.getTagValueIndexed(TagIds.SamplesPerPixel);
    return value !== null && value !== void 0 ? value : 1;
  }

  getNumberOfImplicitFrames() {
    if (this.isCompressed()) {
      return 1;
    }

    const {
      pixelData
    } = this;
    const length = pixelData.offsetEnd - pixelData.offsetValue;
    const size = this.columns * this.rows * Math.round(this.bitsAllocated / 8);
    return Math.floor(length / size);
  }
  /**
   * Returns the pixel representation.
   * @returns {PixelRepresentation}
   */


  get pixelRepresentation() {
    return this.getTagValueIndexed(TagIds.PixelRepresentation);
  }
  /**
   * Returns the pixel padding value
   * @returns {PixelPaddingValue}
   */


  get pixelPaddingValue() {
    return this.getTagValueIndexed(TagIds.PixelPaddingValue);
  }
  /**
   * Returns the photometric interpretation.
   * @returns {string}
   */


  get photometricInterpretation() {
    return this.getTagValueIndexed(TagIds.PhotometricInterpretation);
  }
  /**
   * Returns the patient name.
   * @returns {string}
   */


  get patientName() {
    return this.getTagValueIndexed(TagIds.PatientName);
  }
  /**
   * Returns the patient ID.
   * @returns {string}
   */


  get patientID() {
    return this.getTagValueIndexed(TagIds.PatientId);
  }
  /**
   * Returns the study time.
   * @returns {string}
   */


  get studyTime() {
    return this.getTagValueIndexed(TagIds.StudyTime);
  }
  /**
   * Returns the transfer syntax.
   * @returns {string}
   */


  get transferSyntax() {
    return this.getTagValueIndexed(TagIds.TransferSyntax);
  }
  /**
   * Sets the tranfer syntax - so we can override it
   */


  set transferSyntax(syntax) {
    this.getTag(TagIds.TransferSyntax).convertedValue = syntax;
  }
  /**
   * Returns the study date.
   * @returns {string}
   */


  get studyDate() {
    return this.getTagValueIndexed(TagIds.StudyDate);
  }
  /**
   * Returns the planar configuration.
   * @returns {number}
   */


  get planarConfig() {
    return this.getTagValueIndexed(TagIds.PlanarConfig);
  }
  /**
   * Returns all descriptive info for this image.
   * @returns {string}
   */


  get imageDescription() {
    const values = [this.getTagValueIndexed(TagIds.StudyDes), this.getTagValueIndexed(TagIds.SeriesDescription), this.getTagValueIndexed(TagIds.ImageComments)].filter(el => el !== null);
    return values.join(" ").trim();
  }
  /**
   * Returns the datatype (e.g., ByteType.integerUnsigned).
   * @returns {number}
   */


  get dataType() {
    var _this$photometricInte;

    const dataType = this.pixelRepresentation;

    if (dataType === null) {
      return ByteType.Unkown;
    }

    const interp = ((_this$photometricInte = this.photometricInterpretation) === null || _this$photometricInte === void 0 ? void 0 : _this$photometricInte.trim()) || null;

    if (interp && (interp.indexOf("RGB") !== -1 || interp.indexOf("YBR") !== -1 || interp.toLowerCase().indexOf("palette") !== -1)) {
      return ByteType.Rgb;
    }

    if (dataType === 0) {
      return ByteType.IntegerUnsigned;
    }

    if (dataType === 1) {
      return ByteType.Integer;
    }

    return ByteType.Unkown;
  } // originally from: http://public.kitware.com/pipermail/insight-users/2005-March/012246.html


  get acquiredSliceDirection() {
    const dirCos = this.getTagValue(TagIds.ImageOrientation);

    if ((dirCos === null || dirCos === void 0 ? void 0 : dirCos.length) !== 6) {
      return SliceDirection.Unknown;
    }

    const rowAxis = getMajorAxisFromPatientRelativeDirectionCosine(dirCos[0], dirCos[1], dirCos[2]);
    const colAxis = getMajorAxisFromPatientRelativeDirectionCosine(dirCos[3], dirCos[4], dirCos[5]);

    if (rowAxis !== null && colAxis !== null) {
      if ((rowAxis === "R" || rowAxis === "L") && (colAxis === "A" || colAxis === "P")) {
        return SliceDirection.Axial;
      }

      if ((colAxis === "R" || colAxis === "L") && (rowAxis === "A" || rowAxis === "P")) {
        return SliceDirection.Axial;
      }

      if ((rowAxis === "R" || rowAxis === "L") && (colAxis === "H" || colAxis === "F")) {
        return SliceDirection.Coronal;
      }

      if ((colAxis === "R" || colAxis === "L") && (rowAxis === "H" || rowAxis === "F")) {
        return SliceDirection.Coronal;
      }

      if ((rowAxis === "A" || rowAxis === "P") && (colAxis === "H" || colAxis === "F")) {
        return SliceDirection.Sagittal;
      }

      if ((colAxis === "A" || colAxis === "P") && (rowAxis === "H" || rowAxis === "F")) {
        return SliceDirection.Sagittal;
      }
    }

    return SliceDirection.Oblique;
  }
  /**
   * Returns a string of interpreted private data.
   * @returns {string}
   */


  get allInterpretedPrivateData() {
    let str = "";
    const sortedKeys = Object.keys(this.tags).sort();

    for (let ctr = 0; ctr < sortedKeys.length; ctr += 1) {
      const key = sortedKeys[ctr]; // eslint-disable-next-line no-prototype-builtins

      if (this.tags.hasOwnProperty(key)) {
        const tag = this.tags[key];

        if (tag.hasInterpretedPrivateData()) {
          str += tag.value;
        }
      }
    }

    return str;
  }
  /**
   * Returns a string representation of this image.
   * @returns {string}
   */


  toString() {
    let str = "";
    const sortedKeys = Object.keys(this.tags).sort();

    for (let ctr = 0; ctr < sortedKeys.length; ctr += 1) {
      const key = sortedKeys[ctr];
      const tag = this.tags[key];

      if (tag) {
        str += `${tag.toHTMLString()}<br />`;
      }
    }

    str = str.replace(/\n\s*\n/g, "\n"); // replace mutli-newlines with single newline

    str = str.replace(/(?:\r\n|\r|\n)/g, "<br />"); // replace newlines with <br>

    return str;
  }

}

DCMImage.skipPaletteConversion = false;
/* eslint no-use-before-define: ["error", { "classes": false }] */

const MAGIC_COOKIE_OFFSET = 128;
const MAGIC_COOKIE = [68, 73, 67, 77];
/**
 * Returns true if the DICOM magic cookie is found.
 * @param {DataView} data
 * @returns {boolean}
 */

const isMagicCookieFound = data => {
  const offset = MAGIC_COOKIE_OFFSET;
  const magicCookieLength = MAGIC_COOKIE.length;

  for (let ctr = 0; ctr < magicCookieLength; ctr += 1) {
    if (data.getUint8(offset + ctr) !== MAGIC_COOKIE[ctr]) {
      return false;
    }
  }

  return true;
};

const findFirstTagOffset = data => {
  const magicCookieLength = MAGIC_COOKIE.length;

  if (isMagicCookieFound(data)) {
    return MAGIC_COOKIE_OFFSET + magicCookieLength;
  }

  const searchOffsetMax = MAGIC_COOKIE_OFFSET * 5;
  let found = false;
  let offset = 0;

  for (let ctr = 0; ctr < searchOffsetMax; ctr += 1) {
    const ch = data.getUint8(ctr);

    if (ch === MAGIC_COOKIE[0]) {
      found = true;

      for (let ctrIn = 1; ctrIn < magicCookieLength; ctrIn += 1) {
        if (data.getUint8(ctr + ctrIn) !== MAGIC_COOKIE[ctrIn]) {
          found = false;
        }
      }

      if (found) {
        offset = ctr + magicCookieLength;
        break;
      }
    }
  }

  return offset;
};
/**
 * Parser class
 */


class Parser {
  constructor() {
    this.littleEndian = true;
    this.explicit = true;
    this.metaExplicit = true;
    this.metaFound = false;
    this.metaFinished = false;
    this.metaFinishedOffset = -1;
    this.needsDeflate = false;
    this.inflated = null;
    this.encapsulation = false;
    this.level = 0;
    this.error = null;
    this.charset = null;
  }
  /**
   * Parses this data and returns an image object.
   * @param {DataView} data
   * @returns {Image|null}
   */


  parse(dataIn) {
    let image = null;
    let data = dataIn;

    try {
      image = new DCMImage();
      const offset = findFirstTagOffset(data);
      let tag = this.getNextTag(data, offset);

      while (tag !== null) {
        if (Parser.verbose) {
          console.log(tag.toString());
        }

        image.putTag(tag);

        if (tag.is(TagIds.PixelData)) {
          break;
        }

        if (this.needsDeflate && tag.offsetEnd >= this.metaFinishedOffset) {
          this.needsDeflate = false;
          const copyMeta = data.buffer.slice(0, tag.offsetEnd);
          const copyDeflated = data.buffer.slice(tag.offsetEnd);
          this.inflated = concatArrayBuffers(copyMeta, _pako.default.inflateRaw(copyDeflated));
          data = new DataView(this.inflated);
        }

        tag = this.getNextTag(data, tag.offsetEnd);
      }
    } catch (err) {
      this.error = err;
    }

    if (image !== null) {
      // set cached tags
      image.littleEndian = this.littleEndian;
    }

    return image;
  }

  parseEncapsulated(data) {
    this.encapsulation = true;
    const tags = [];

    try {
      let tag = this.getNextTag(data, 0);

      while (tag !== null) {
        if (tag.is(TagIds.SublistItem)) {
          tags.push(tag);
        }

        if (Parser.verbose) {
          console.log(tag.toString());
        }

        tag = this.getNextTag(data, tag.offsetEnd);
      }
    } catch (err) {
      this.error = err;
    }

    return tags;
  }

  testForValidTag(data) {
    let tag = null;

    try {
      const offset = findFirstTagOffset(data);
      tag = this.getNextTag(data, offset, false);
    } catch (err) {
      this.error = err;
    }

    return tag;
  }

  getNextTag(data, offsetStart, testForTag = false) {
    let group = 0;
    let value = null;
    let offset = offsetStart;
    let length = 0;
    let little = true;
    let vr = null;

    if (offset >= data.byteLength) {
      return null;
    }

    if (this.metaFinished) {
      little = this.littleEndian;
      group = data.getUint16(offset, little);
    } else {
      group = data.getUint16(offset, true);

      if (this.metaFinishedOffset !== -1 && offset >= this.metaFinishedOffset || group !== 0x0002) {
        this.metaFinished = true;
        little = this.littleEndian;
        group = data.getUint16(offset, little);
      }
    }

    if (!this.metaFound && group === 0x0002) {
      this.metaFound = true;
    }

    offset += 2;
    const element = data.getUint16(offset, little);
    offset += 2;
    let useImplicitVR = true;

    if (this.explicit && this.metaFinished || this.metaExplicit && !this.metaFinished) {
      vr = String.fromCharCode(data.getUint8(offset)) + String.fromCharCode(data.getUint8(offset + 1));
      const foundVR = Parser.VRS.indexOf(vr) !== -1;

      if (!foundVR && (!this.metaFound && this.metaFinished || this.metaFound && !this.metaFinished)) {
        if (this.metaFinished) {
          this.explicit = false;
        } else {
          this.metaExplicit = false;
        }
      } else {
        offset += 2;

        if (Parser.DATA_VRS.indexOf(vr) !== -1) {
          offset += 2; // skip two empty bytes

          length = data.getUint32(offset, little);
          offset += 4;
        } else {
          length = data.getUint16(offset, little);
          offset += 2;
        }

        useImplicitVR = false;
      }
    }

    if (useImplicitVR) {
      vr = Dictionary.getVR(group, element);
      length = data.getUint32(offset, little);

      if (length === Parser.UNDEFINED_LENGTH) {
        vr = "SQ";
      }

      offset += 4;
    }

    const offsetValue = offset;
    const isPixelData = Tag.isEqual({
      group,
      element
    }, TagIds.PixelData);

    if (vr === "SQ" || this.level > 0 && Parser.DATA_VRS.indexOf(vr) !== -1) {
      value = this.parseSublist(data, offset, length, vr !== "SQ");

      if (length === Parser.UNDEFINED_LENGTH) {
        const _tag = value[value.length - 1];
        length = _tag.offsetEnd - offset;
      }
    } else if (length > 0 && !testForTag) {
      if (length === Parser.UNDEFINED_LENGTH) {
        if (isPixelData) {
          length = data.byteLength - offset;
        }
      }

      if (length > 0) {
        value = new DataView(data.buffer, data.byteOffset + offset, length);
      }
    }

    offset += length;
    const tag = new Tag({
      group,
      element,
      vr,
      value,
      offsetStart,
      offsetValue,
      offsetEnd: offset,
      littleEndian: little,
      charset: this.charset
    });

    if (tag.hasValue()) {
      if (tag.is(TagIds.TransferSyntax)) {
        const [val] = tag.value;
        this.explicit = true;
        this.littleEndian = true;

        if (val === TransferSyntax.ImplicitLittle) {
          this.explicit = false;
        } else if (val === TransferSyntax.ExplicitBig) {
          this.littleEndian = false;
        } else if (val === TransferSyntax.CompressionDeflate) {
          this.needsDeflate = true;
        }
      } else if (tag.is(TagIds.MetaLength)) {
        const [val] = tag.value;
        this.metaFinishedOffset = val + offset;
      } else if (tag.is(TagIds.Charset)) {
        const charsetValue = tag.value;
        let charset = DefaultCharset;

        if (charsetValue.length === 2) {
          charset = `${charsetValue[0] || DefaultCharset}\\${charsetValue[1]}`;
        } else if (charsetValue.length === 1) {
          [charset] = charsetValue;
        }

        this.charset = charset;
      }
    }

    return tag;
  }

  parseSublist(data, offsetStart, length, raw) {
    const tags = [];
    let offset = offsetStart;
    const offsetEnd = offsetStart + length;
    this.level += 1;

    if (length === Parser.UNDEFINED_LENGTH) {
      let sublistItem = this.parseSublistItem(data, offset, raw);

      while (!sublistItem.is(TagIds.SequenceDelim)) {
        tags.push(sublistItem);
        offset = sublistItem.offsetEnd || 0;
        sublistItem = this.parseSublistItem(data, offset, raw);
      }

      tags.push(sublistItem);
    } else {
      while (offset < offsetEnd) {
        const sublistItem = this.parseSublistItem(data, offset, raw);
        tags.push(sublistItem);
        offset = sublistItem.offsetEnd || 0;
      }
    }

    this.level -= 1;
    return tags;
  }

  parseSublistItem(data, offsetStart, raw) {
    var _value;

    let offset = offsetStart;
    let value = null;
    const tags = [];
    const group = data.getUint16(offset, this.littleEndian);
    offset += 2;
    const element = data.getUint16(offset, this.littleEndian);
    offset += 2;
    let length = data.getUint32(offset, this.littleEndian);
    offset += 4;
    const offsetValue = offset;

    if (length === Parser.UNDEFINED_LENGTH) {
      let tag = this.getNextTag(data, offset);

      while (!tag.is(TagIds.SublistItemDelim)) {
        tags.push(tag);
        offset = tag.offsetEnd;
        tag = this.getNextTag(data, offset);
      }

      tags.push(tag);
      offset = tag.offsetEnd;
    } else if (raw) {
      length = Math.min(data.byteLength - offset - data.byteOffset, length);
      value = new DataView(data.buffer, offset + data.byteOffset, length);
      offset += length;
    } else {
      const offsetEnd = offset + length;
      let tag;

      while (offset < offsetEnd) {
        tag = this.getNextTag(data, offset);
        tags.push(tag);
        offset = tag.offsetEnd;
      }
    }

    const sublistItemTag = new Tag({
      group,
      element,
      value: (_value = value) !== null && _value !== void 0 ? _value : tags,
      offsetStart,
      offsetValue,
      offsetEnd: offset,
      littleEndian: this.littleEndian
    });
    return sublistItemTag;
  }

  hasError() {
    return this.error !== null;
  }

}

exports.Parser = Parser;
Parser.verbose = false;
Parser.VRS = ["AE", "AS", "AT", "CS", "DA", "DS", "DT", "FL", "FD", "IS", "LO", "LT", "OB", "OD", "OF", "OW", "PN", "SH", "SL", "SS", "ST", "TM", "UI", "UL", "UN", "US", "UT"];
Parser.DATA_VRS = ["OB", "OW", "OF", "SQ", "UT", "UN"];
Parser.RAW_DATA_VRS = ["OB", "OD", "OF", "OW", "UN"];
Parser.UNDEFINED_LENGTH = 0xFFFFFFFF;

class OrderedMapIterator {
  constructor(orderedMap) {
    this.orderedMap = void 0;
    this.index = void 0;
    this.orderedMap = orderedMap;
    this.index = 0;
  }

  hasNext() {
    return this.index < this.orderedMap.orderedKeys.length;
  }

  next() {
    const item = this.orderedMap.get(this.orderedMap.orderedKeys[this.index]);
    this.index += 1;
    return item;
  }

  length() {
    return this.orderedMap.orderedKeys.length;
  }

} // Based on: http://stackoverflow.com/questions/3549894/javascript-data-structure-for-fast-lookup-and-ordered-looping


class OrderedMap {
  constructor() {
    this.orderedKeys = [];
    this.map = new Map();
    this.index = 0;
  } // bit of a hack - necessary for Series


  put(key, value) {
    if (!this.map.get(key)) {
      // insert new key and value
      this.orderedKeys.push(key);
      this.orderedKeys.sort((a, b) => parseFloat(a) - parseFloat(b));
    }

    this.map.set(key, value);
  }

  remove(key) {
    const index = this.orderedKeys.indexOf(key);

    if (index === -1) {
      throw new Error("key does not exist");
    }

    this.orderedKeys.splice(index, 1);
    this.map.delete(key);
  }

  get(key) {
    return this.map.get(key);
  }

  iterator() {
    return new OrderedMapIterator(this);
  }

  getOrderedValues() {
    const it = this.iterator();
    const orderedValues = Array(it.length());

    while (it.hasNext()) {
      orderedValues.push(it.next());
    }

    return orderedValues;
  }

}

const getMosaicOffset = (mosaicCols, mosaicColWidth, mosaicRowHeight, mosaicWidth, xLocVal, yLocVal, zLocVal) => {
  let xLoc = xLocVal;
  let yLoc = yLocVal;
  const zLoc = zLocVal;
  xLoc = zLoc % mosaicCols * mosaicColWidth + xLoc;
  yLoc = (Math.floor(zLoc / mosaicCols) * mosaicRowHeight + yLoc) * mosaicWidth;
  return xLoc + yLoc;
};

const orderByImagePosition = (images, sliceDir) => {
  const dicomMap = new OrderedMap();

  for (let ctr = 0; ctr < images.length; ctr += 1) {
    dicomMap.put(images[ctr].getImagePositionSliceDir(sliceDir), images[ctr]);
  }

  return dicomMap.getOrderedValues();
};

const orderBySliceLocation = images => {
  const dicomMap = new OrderedMap();

  for (let ctr = 0; ctr < images.length; ctr += 1) {
    dicomMap.put(images[ctr].sliceLocation, images[ctr]);
  }

  return dicomMap.getOrderedValues();
};

const orderByImageNumber = images => {
  const dicomMap = new OrderedMap();

  for (let ctr = 0; ctr < images.length; ctr += 1) {
    dicomMap.put(images[ctr].imageNumber, images[ctr]);
  }

  return dicomMap.getOrderedValues();
};

const hasMatchingSlice = (dg, image, sliceDir, doImagePos, doSliceLoc) => {
  let matchingNum = 0;

  if (doImagePos) {
    matchingNum = image.getImagePositionSliceDir(sliceDir);
  } else if (doSliceLoc) {
    matchingNum = image.sliceLocation;
  } else {
    matchingNum = image.imageNumber;
  }

  for (let ctr = 0; ctr < dg.length; ctr += 1) {
    const current = dg[ctr];

    if (doImagePos) {
      const imagePos = current.getImagePositionSliceDir(sliceDir);

      if (imagePos === matchingNum) {
        return true;
      }
    } else if (doSliceLoc) {
      const sliceLoc = current.sliceLocation;

      if (sliceLoc === matchingNum) {
        return true;
      }
    } else {
      const imageNum = current.imageNumber;

      if (imageNum === matchingNum) {
        return true;
      }
    }
  }

  return false;
};

const orderByTime = (images, numFrames, sliceDir, hasImagePosition, hasSliceLocation) => {
  const dicomMap = new OrderedMap();
  const hasTemporalPosition = numFrames > 1 && images[0].temporalPosition !== null;
  const hasTemporalNumber = numFrames > 1 && images[0].temporalNumber !== null && images[0].temporalNumber === numFrames;

  if (hasTemporalPosition && hasTemporalNumber) {
    // explicit series
    for (let ctr = 0; ctr < images.length; ctr += 1) {
      const image = images[ctr];
      const tempPos = image.temporalPosition;
      let dg = dicomMap.get(tempPos);

      if (!dg) {
        dg = [];
        dicomMap.put(tempPos, dg);
      }

      dg.push(image);
    }
  } else {
    // implicit series
    // order data by slice then time
    const timeBySliceMap = new OrderedMap();

    for (let ctr = 0; ctr < images.length; ctr += 1) {
      if (images[ctr] !== null) {
        let sliceMarker = ctr;

        if (hasImagePosition) {
          sliceMarker = images[ctr].getImagePositionSliceDir(sliceDir);
        } else if (hasSliceLocation) {
          sliceMarker = images[ctr].sliceLocation;
        }

        let slice = timeBySliceMap.get(sliceMarker);

        if (slice === null) {
          slice = new OrderedMap();
          timeBySliceMap.put(sliceMarker, slice);
        }

        slice.put(ctr, images[ctr]);
      }
    } // copy into DICOM array (ordered by slice by time)


    const dicomsCopy = [];
    let dicomsCopyIndex = 0;
    const sliceIt = timeBySliceMap.iterator();

    while (sliceIt.hasNext()) {
      const slice = sliceIt.next();
      const timeIt = slice.iterator();

      while (timeIt.hasNext()) {
        dicomsCopy[dicomsCopyIndex] = timeIt.next();
        dicomsCopyIndex += 1;
      }
    } // groups dicoms by timepoint


    for (let ctr = 0; ctr < dicomsCopy.length; ctr += 1) {
      if (dicomsCopy[ctr] !== null) {
        let dgFound;
        const it = dicomMap.iterator();

        while (it.hasNext()) {
          const dg = it.next();

          if (!hasMatchingSlice(dg, dicomsCopy[ctr], sliceDir, hasImagePosition, hasSliceLocation)) {
            dgFound = dg;
            break;
          }
        }

        if (dgFound === null) {
          dgFound = [];
          dicomMap.put(dicomMap.orderedKeys.length, dgFound);
        }

        dgFound.push(dicomsCopy[ctr]);
      }
    }
  }

  return dicomMap;
};

const orderDicoms = (images, numFrames, sliceDir) => {
  const hasImagePosition = images[0].imagePosition !== null;
  const hasSliceLocation = images[0].sliceLocation !== null;
  const hasImageNumber = images[0].imageNumber !== null;
  const timeMap = orderByTime(images, numFrames, sliceDir, hasImagePosition, hasSliceLocation);
  const timeIt = timeMap.orderedKeys;
  const imagesOrderedByTimeAndSpace = [];

  for (let ctr = 0; ctr < timeIt.length; ctr += 1) {
    const dg = timeMap.get(timeIt[ctr]);
    let ordered;

    if (hasImagePosition) {
      ordered = orderByImagePosition(dg, sliceDir);
    } else if (hasSliceLocation) {
      ordered = orderBySliceLocation(dg);
    } else if (hasImageNumber) {
      ordered = orderByImageNumber(dg);
    } else {
      ordered = dg;
    }

    for (let ctrIn = 0; ctrIn < ordered.length; ctrIn += 1) {
      imagesOrderedByTimeAndSpace.push(ordered[ctrIn]);
    }
  }

  for (let ctrIn = 0; ctrIn < imagesOrderedByTimeAndSpace.length; ctrIn += 1) {
    imagesOrderedByTimeAndSpace[ctrIn].index = ctrIn;
  }

  return imagesOrderedByTimeAndSpace;
};
/**
 * The Series constructor.
 * @property {DCMImage[]} images
 * @type {Function}
 */


class Series {
  constructor() {
    this.images = [];
    this.imagesOriginalOrder = null;
    this.isMosaic = false;
    this.isElscint = false;
    this.isCompressed = false;
    this.numberOfFrames = 0;
    this.numberOfFramesInFile = 0;
    this.isMultiFrame = false;
    this.isMultiFrameVolume = false;
    this.isMultiFrameTimeseries = false;
    this.isImplicitTimeseries = false;
    this.sliceSense = false;
    this.sliceDir = SliceDirection.Unknown;
    this.error = null;
  }

  getOrder() {
    const order = [];

    for (let ctr = 0; ctr < this.imagesOriginalOrder.length; ctr += 1) {
      order[ctr] = this.imagesOriginalOrder[ctr].index;
    }

    return order;
  }
  /**
   * Returns the series ID.
   * @returns {string}
   */


  toString() {
    return this.images[0].seriesId;
  }
  /**
   * Returns a nice name for the series.
   * @returns {string|null}
   */


  getName() {
    const des = this.images[0].seriesDescription;
    const uid = this.images[0].seriesInstanceUID;

    if (des !== null) {
      return des;
    }

    if (uid !== null) {
      return uid;
    }

    return null;
  }
  /**
   * Adds an image to the series.
   * @param {DCMImage} image
   */


  addImage(image) {
    this.images.push(image);
  }
  /**
   * Returns true if the specified image is part of the series
   * (or if no images are yet part of the series).
   * @param {DCMImage} image
   * @returns {boolean}
   */


  matchesSeries(image) {
    if (this.images.length === 0) {
      return true;
    }

    return this.images[0].seriesId === image.seriesId;
  }
  /**
   * Orders and organizes the images in this series.
   */


  buildSeries() {
    const [image0] = this.images;
    this.isMosaic = image0.isMosaic();
    this.isElscint = image0.isElscint();
    this.isCompressed = image0.isCompressed(); // check for multi-frame

    this.numberOfFrames = image0.numberOfFrames;
    this.numberOfFramesInFile = image0.getNumberOfImplicitFrames();
    this.isMultiFrame = this.numberOfFrames > 1 || this.isMosaic && image0.mosaicCols * image0.mosaicRows > 1;
    this.isMultiFrameVolume = false;
    this.isMultiFrameTimeseries = false;
    this.isImplicitTimeseries = false;

    if (this.isMultiFrame) {
      const hasFrameTime = image0.getFrameTime() > 0;

      if (this.isMosaic) {
        this.isMultiFrameTimeseries = true;
      } else if (hasFrameTime) {
        this.isMultiFrameTimeseries = true;
      } else if (this.numberOfFramesInFile > 1) {
        this.isMultiFrameTimeseries = true;
        this.numberOfFrames = this.images.length;
      } else {
        this.isMultiFrameVolume = true;
      }
    }

    if (!this.isMosaic && this.numberOfFrames <= 1) {
      // check for implicit frame count
      let imagePos = image0.imagePosition || [];
      const sliceLoc = imagePos.toString();
      this.numberOfFrames = 0;

      for (let ctr = 0; ctr < this.images.length; ctr += 1) {
        imagePos = this.images[ctr].imagePosition || [];

        if (imagePos.toString() === sliceLoc) {
          this.numberOfFrames += 1;
        }
      }

      if (this.numberOfFrames > 1) {
        this.isImplicitTimeseries = true;
      }
    }

    this.sliceDir = image0.acquiredSliceDirection;
    let orderedImages;

    if (Series.useExplicitOrdering) {
      orderedImages = this.images.slice();
    } else {
      orderedImages = orderDicoms(this.images, this.numberOfFrames, this.sliceDir);
    }

    const sliceLocationFirst = orderedImages[0].getImagePositionSliceDir(this.sliceDir);
    const sliceLocationLast = orderedImages[orderedImages.length - 1].getImagePositionSliceDir(this.sliceDir);
    const sliceLocDiff = sliceLocationLast - sliceLocationFirst;

    if (Series.useExplicitOrdering) {
      this.sliceSense = false;
    } else if (this.isMosaic) {
      this.sliceSense = true;
    } else if (this.isMultiFrame) {
      const sliceLocations = orderedImages[0].sliceLocationVector;

      if (sliceLocations !== null) {
        const {
          orientation
        } = orderedImages[0];

        if ((orientation === null || orientation === void 0 ? void 0 : orientation.charAt(2)) === "Z") {
          this.sliceSense = sliceLocations[0] - sliceLocations[sliceLocations.length - 1] < 0;
        } else {
          this.sliceSense = sliceLocations[0] - sliceLocations[sliceLocations.length - 1] > 0;
        }
      } else {
        this.sliceSense = sliceLocationFirst >= 0;
      }
    }
    /*
    * "The direction of the axes is defined fully by the patient's orientation.
    * The x-axis is increasing to the left hand side of the patient. The
    * y-axis is increasing to the posterior side of the patient.
    * The z-axis is increasing toward the head of the patient."
    */
    else if (this.sliceDir === SliceDirection.Sagittal || this.sliceDir === SliceDirection.Coronal) {
      if (sliceLocDiff > 0) {
        this.sliceSense = false;
      } else {
        this.sliceSense = true;
      }
    } else if (sliceLocDiff > 0) {
      this.sliceSense = true;
    } else {
      this.sliceSense = false;
    }

    this.imagesOriginalOrder = this.images;
    this.images = orderedImages;
  }

  getMosaicData(image, data) {
    const [image0] = this.images;
    const mosaicWidth = image0.columns;
    const mosaicHeight = image0.rows;
    const {
      mosaicRows,
      mosaicCols
    } = image0;
    const numBytes = image0.bytesAllocated || 1;
    const numSlices = mosaicWidth * mosaicHeight;
    const numRows = Math.floor(mosaicHeight / mosaicRows);
    const numCols = Math.floor(mosaicWidth / mosaicCols);
    const mosaicRowHeight = Math.floor(mosaicHeight / mosaicRows);
    const mosaicColWidth = Math.floor(mosaicWidth / mosaicCols);
    const buffer = new Uint8Array(new ArrayBuffer(numSlices * numRows * numCols * numBytes));
    const dataTyped = new Uint8Array(data);
    let index = 0;

    for (let ctrS = 0; ctrS < numSlices; ctrS += 1) {
      for (let ctrR = 0; ctrR < numRows; ctrR += 1) {
        for (let ctrC = 0; ctrC < numCols; ctrC += 1) {
          const offset = getMosaicOffset(mosaicCols, mosaicColWidth, mosaicRowHeight, mosaicWidth, ctrC, ctrR, ctrS);

          for (let ctr = 0; ctr < numBytes; ctr += 1) {
            buffer[index] = dataTyped[offset * numBytes + ctr];
            index += 1;
          }
        }
      }
    }

    return buffer.buffer;
  }

}
/**
 * Parses the DICOM header and return an image object.
 * @param {DataView|ArrayBuffer} data
 * @returns {DCMImage|null}
 */


Series.parserError = null;
Series.useExplicitOrdering = false;
Series.useExplicitSpacing = 0;

const parseImage = data => {
  const parser = new Parser();
  let dataView;

  if (data instanceof DataView) {
    dataView = data;
  } else {
    dataView = new DataView(data);
  }

  const image = parser.parse(dataView);

  if (parser.hasError()) {
    Series.parserError = parser.error;
    return null;
  }

  if (parser.inflated) {
    image.inflated = parser.inflated;
  }

  return image;
};

exports.parseImage = parseImage;

const getEncapsulatedData = data => {
  const parser = new Parser();
  return parser.parseEncapsulated(data);
};

const concatDataViews = dataViews => {
  let length = 0;
  let offset = 0;

  for (let ctr = 0; ctr < dataViews.length; ctr += 1) {
    length += dataViews[ctr].byteLength;
  }

  const tmp = new Uint8Array(length);
  let dataView;

  for (let ctr = 0; ctr < dataViews.length; ctr += 1) {
    dataView = dataViews[ctr];
    tmp.set(new Uint8Array(dataView.buffer, dataView.byteOffset, dataView.byteLength), offset);
    offset += dataViews[ctr].byteLength;
  }

  return new DataView(tmp.buffer);
};

const JPEG_MAGIC_NUMBER = [0xFF, 0xD8];
const JPEG2000_MAGIC_NUMBER = [0xFF, 0x4F, 0xFF, 0x51];

const isHeaderJPEG = data => {
  if (!data) {
    return false;
  }

  if (data.getUint8(0) !== JPEG_MAGIC_NUMBER[0]) {
    return false;
  }

  if (data.getUint8(1) !== JPEG_MAGIC_NUMBER[1]) {
    return false;
  }

  return true;
};

const isHeaderJPEG2000 = data => {
  if (!data) {
    return false;
  }

  for (let ctr = 0; ctr < JPEG2000_MAGIC_NUMBER.length; ctr += 1) {
    if (data.getUint8(ctr) !== JPEG2000_MAGIC_NUMBER[ctr]) {
      return false;
    }
  }

  return true;
};

const getJpegData = inData => {
  const encapTags = getEncapsulatedData(inData);
  const data = [];
  const dataConcat = [];
  let currentJpeg; // organize data as an array of an array of JPEG parts

  if (encapTags) {
    const numTags = encapTags.length;

    for (let ctr = 0; ctr < numTags; ctr += 1) {
      const dataView = encapTags[ctr].value;

      if (isHeaderJPEG(dataView) || isHeaderJPEG2000(dataView)) {
        currentJpeg = [];
        currentJpeg.push(dataView);
        data.push(currentJpeg);
      } else if (currentJpeg && dataView) {
        currentJpeg.push(dataView);
      }
    }
  } // concat into an array of full JPEGs


  for (let ctr = 0; ctr < data.length; ctr += 1) {
    const buffers = data[ctr];

    if (buffers.length > 1) {
      // TODO: this will be slow...is it necessary?
      dataConcat[ctr] = concatDataViews(buffers);
    } else {
      [dataConcat[ctr]] = data[ctr];
    }

    delete data[ctr];
  }

  return dataConcat;
};

class RLEDecoder extends Decoder {
  constructor(...args) {
    super(...args);
    this.rleData = null;
  }

  decode(frameNo) {
    return import('./rle-2b767c29.js').then(RLE => {
      const {
        image
      } = this;

      if (!this.rleData) {
        const encapTags = getEncapsulatedData(image.data);
        const numTags = (encapTags === null || encapTags === void 0 ? void 0 : encapTags.length) || 0;
        const data = new Array(numTags); // the first sublist item contains offsets - ignore

        for (let ctr = 1; ctr < numTags; ctr += 1) {
          const dataView = encapTags[ctr].rawValue;
          data[ctr - 1] = dataView;
        }

        this.rleData = data; // don't decode to planar...just makes render more complex
        // RLE input is the same either way

        if (image.planar) {
          image.planar = false;
        }
      }

      const decompressed = RLE.default(image, this.rleData[frameNo]);
      return decompressed;
    });
  }

}

class NativeDecoder extends Decoder {
  constructor(image) {
    super(image);
    this.jpegData = void 0;
    this.image.rgb = true; // native img decoder outputs RGB

    this.jpegData = getJpegData(image.data);
  }

  createTexture(gl, frameNo) {
    var _this$jpegData;

    const {
      width,
      height
    } = this.outputSize;
    const jpegFrameData = (_this$jpegData = this.jpegData) === null || _this$jpegData === void 0 ? void 0 : _this$jpegData[frameNo];

    if (!jpegFrameData) {
      throw Error("No Native JPEG image data");
    }

    const blob = new Blob([jpegFrameData]);
    const src = URL.createObjectURL(blob);
    return new Promise((resolve, reject) => {
      twgl.createTexture(gl, {
        src,
        width,
        height,
        type: gl.UNSIGNED_BYTE,
        min: gl.NEAREST,
        mag: gl.NEAREST,
        wrap: gl.CLAMP_TO_EDGE
      }, (error, texture) => {
        URL.revokeObjectURL(src);

        if (error) {
          reject(error);
        }

        resolve(texture);
      });
    });
  }

}

class JPEGLosslessDecoder$2 extends Decoder {
  constructor(...args) {
    super(...args);
    this.jpegs = null;
  }

  decode(frameNo) {
    var _this$jpegs;

    const {
      image
    } = this;

    if (!this.jpegs) {
      this.jpegs = getJpegData(image.data);
    }

    if (!((_this$jpegs = this.jpegs) !== null && _this$jpegs !== void 0 && _this$jpegs.length)) {
      return Promise.reject(new Error("No JPEG lossless image data"));
    }

    const decoder = new _jpegLosslessDecoderJs.lossless.Decoder();
    const jpeg = this.jpegs[frameNo];
    const buffer = new Uint8Array(jpeg.buffer, jpeg.byteOffset, jpeg.byteLength);
    const temp = decoder.decode(buffer); // const numComponents = decoder.numComp;

    return Promise.resolve(temp);
  }

}

class JPEGLosslessDecoder$1 extends Decoder {
  constructor(...args) {
    super(...args);
    this.jpegs = null;
  }

  decode(frameNo) {
    var _this$jpegs;

    const {
      image
    } = this;

    if (!this.jpegs) {
      this.jpegs = getJpegData(image.data);
    }

    if (!((_this$jpegs = this.jpegs) !== null && _this$jpegs !== void 0 && _this$jpegs.length)) {
      return Promise.reject(new Error("No JPEG-LS image data"));
    }

    return new Promise(resolve => {
      let charLS;

      const init = () => {
        const decoder = new charLS.JpegLSDecoder();
        const jpeg = this.jpegs[frameNo];
        const buffer = new Uint8Array(jpeg.buffer, jpeg.byteOffset, jpeg.byteLength);
        const encodedBuffer = decoder.getEncodedBuffer(buffer.length);
        encodedBuffer.set(buffer);
        decoder.decode();
        const decoded = decoder.getDecodedBuffer();
        return resolve(decoded);
      };

      import('./charlsjs-d0f5a366.js').then(CharLS => {
        charLS = CharLS.default({
          onRuntimeInitialized: init
        });
      });
    });
  }

}

class JPEG2000Decoder extends Decoder {
  constructor(...args) {
    super(...args);
    this.jpegs = null;
  }

  decode(frameNo) {
    var _this$jpegs;

    const {
      image
    } = this;

    if (!this.jpegs) {
      this.jpegs = getJpegData(image.data);
    }

    if (!((_this$jpegs = this.jpegs) !== null && _this$jpegs !== void 0 && _this$jpegs.length)) {
      return Promise.reject(new Error("No JPEG2000 image data"));
    }

    return new Promise(resolve => {
      let OJ;

      const init = () => {
        const decoder = new OJ.J2KDecoder();
        const jpeg = this.jpegs[frameNo];
        const buffer = new Uint8Array(jpeg.buffer, jpeg.byteOffset, jpeg.byteLength);
        const encodedBuffer = decoder.getEncodedBuffer(buffer.length);
        encodedBuffer.set(buffer);
        const decodeLevel = 0;
        const decodeLayer = 0;

        for (let i = 0; i < 1; i += 1) {
          decoder.decodeSubResolution(decodeLevel, decodeLayer);
        }

        decoder.getFrameInfo();
        const decodedBuffer = decoder.getDecodedBuffer();
        return resolve(decodedBuffer);
      };

      import('./openjpeg-2693517c.js').then(OpenJpegJS => {
        OJ = OpenJpegJS.default({
          onRuntimeInitialized: init
        });
      });
    });
  }

}

class JPEGLosslessDecoder extends Decoder {
  constructor(...args) {
    super(...args);
    this.jpegs = null;
  }

  decode(frameNo) {
    return import('./jpeg-baseline-81e0d4be.js').then(jpegBaseline => {
      var _this$jpegs;

      const {
        image
      } = this;

      if (!this.jpegs) {
        this.jpegs = getJpegData(image.data);
      }

      if (!((_this$jpegs = this.jpegs) !== null && _this$jpegs !== void 0 && _this$jpegs.length)) {
        return Promise.reject(new Error("No JPEG image data"));
      }

      const decoder = new jpegBaseline.JpegImage();
      const jpeg = this.jpegs[frameNo];
      const buffer = new Uint8Array(jpeg.buffer, jpeg.byteOffset, jpeg.byteLength);
      decoder.parse(buffer);
      const {
        width,
        height
      } = decoder;
      let decoded = null;

      if (image.bitsAllocated === 8) {
        decoded = decoder.getData(width, height);
      } else {
        decoded = decoder.getData16(width, height);
      }

      return Promise.resolve(decoded);
    });
  }

}

class ImageSize {
  constructor({
    width,
    height,
    rows,
    columns
  }) {
    var _ref, _ref2;

    this.width = void 0;
    this.height = void 0;
    this.width = (_ref = width !== null && width !== void 0 ? width : columns) !== null && _ref !== void 0 ? _ref : 0;
    this.height = (_ref2 = height !== null && height !== void 0 ? height : rows) !== null && _ref2 !== void 0 ? _ref2 : 0;
  }

  get rows() {
    return this.height;
  }

  get columns() {
    return this.width;
  }

  get numberOfPixels() {
    const {
      width,
      height
    } = this;
    return width * height;
  }

  scale(scale) {
    let {
      width,
      height
    } = this;
    width *= scale;
    height *= scale;
    return new ImageSize({
      width,
      height
    });
  }

}
/* eslint-disable no-bitwise */


var Codec;

(function (Codec) {
  Codec[Codec["Uncompressed"] = 0] = "Uncompressed";
  Codec[Codec["JPEG"] = 1] = "JPEG";
  Codec[Codec["JPEGExt"] = 2] = "JPEGExt";
  Codec[Codec["JPEG2000"] = 4] = "JPEG2000";
  Codec[Codec["JPEGLS"] = 8] = "JPEGLS";
  Codec[Codec["JPEGLossless"] = 16] = "JPEGLossless";
  Codec[Codec["RLE"] = 32] = "RLE";
})(Codec || (Codec = {}));

const Signed = 0x8;
var PixelDataType;

(function (PixelDataType) {
  PixelDataType[PixelDataType["Uint8"] = 1] = "Uint8";
  PixelDataType[PixelDataType["Int8"] = 0x1 & Signed] = "Int8";
  PixelDataType[PixelDataType["Uint16"] = 2] = "Uint16";
  PixelDataType[PixelDataType["Int16"] = 0x2 & Signed] = "Int16";
})(PixelDataType || (PixelDataType = {}));

class DecoderInfo {
  constructor(image) {
    this.image = void 0;
    this.size = void 0;
    this.codec = void 0;
    this.rgb = void 0;
    this.planar = void 0;
    this.samples = void 0;
    this.bitsAllocated = void 0;
    this.bytesAllocated = void 0;
    this.bitsStored = void 0;
    this.signed = void 0;
    this.littleEndian = void 0;
    this.data = void 0;
    this.image = image;

    if (!image.pixelData) {
      throw Error("Image has no data");
    }

    this.size = new ImageSize(image);

    switch (image.transferSyntax) {
      case TransferSyntax.CompressionJpeg:
      case TransferSyntax.CompressionJpegBaseline8bit:
        this.codec = Codec.JPEG;
        break;

      case TransferSyntax.CompressionJpegBaseline12bit:
        this.codec = Codec.JPEGExt;
        break;

      case TransferSyntax.CompressionJpegLossless:
      case TransferSyntax.CompressionJpegLosslessSel1:
        this.codec = Codec.JPEGLossless;
        break;

      case TransferSyntax.CompressionJpegLs:
      case TransferSyntax.CompressionJpegLsLossless:
        this.codec = Codec.JPEGLS;
        break;

      case TransferSyntax.CompressionJpeg2000Lossless:
      case TransferSyntax.CompressionJpeg2000:
        this.codec = Codec.JPEG2000;
        break;

      case TransferSyntax.CompressionRLE:
        this.codec = Codec.RLE;
        break;

      case TransferSyntax.CompressionDeflate:
      case TransferSyntax.ImplicitLittle:
      case TransferSyntax.ExplicitLittle:
      case TransferSyntax.ExplicitBig:
        this.codec = Codec.Uncompressed;
        break;

      default:
        this.codec = Codec.Uncompressed;
    }

    this.rgb = !(image.photometricInterpretation || "").startsWith("MONO");
    this.planar = !!image.planarConfig;
    this.samples = image.samplesPerPixel;
    this.bitsAllocated = image.bitsAllocated;
    this.bytesAllocated = Math.round(image.bitsAllocated / 8);
    this.bitsStored = image.bitsStored;
    this.signed = image.pixelRepresentation === 1;
    this.data = image.pixelData.value;
    this.littleEndian = image.littleEndian;
  }

}

const decodeInfoForImage = image => new DecoderInfo(image);

const hasCreateObjectURL = !!URL.createObjectURL;

const decoderForImage = image => {
  const info = decodeInfoForImage(image);

  switch (info.codec) {
    case Codec.JPEG:
      if (hasCreateObjectURL) {
        /* istanbul ignore next */
        return new NativeDecoder(info);
      }

      return new JPEGLosslessDecoder(info);

    case Codec.JPEGExt:
      return new JPEGLosslessDecoder(info);

    case Codec.JPEGLS:
      return new JPEGLosslessDecoder$1(info);

    case Codec.JPEGLossless:
      return new JPEGLosslessDecoder$2(info);

    case Codec.JPEG2000:
      // safari support native JPEG2000 decode
      if (hasCreateObjectURL && /^((?!chrome|android).)*safari/i.test(navigator.userAgent)) {
        /* istanbul ignore next */
        return new NativeDecoder(info);
      }

      return new JPEG2000Decoder(info);

    case Codec.RLE:
      return new RLEDecoder(info);

    case Codec.Uncompressed:
      return new Decoder(info);
  }
  /* istanbul ignore next */


  return null;
};
/**
 * Unpack pseudo integer or a float  from a color value
 * insert into GLSL to change behaviour depending on data
 * @param {Image} image the parsed DICOM image
 * @param {Boolean} integerVal should return greyscale psuedo int (0 - 65535)
 * 							   else return a 0.0-1.0 float color ratio
 */


const glslUnpackWordString = (image, integerVal = true) => {
  let val;
  let divisor = "";
  const {
    bitsAllocated,
    signed,
    pixelPaddingVal
  } = image;

  if (!integerVal) {
    divisor = ` / ${2 ** image.bitsStored}.0`;
  }

  if (bitsAllocated <= 8) {
    // one byte
    val = "float p = (color.r * 255.0);\n";

    if (pixelPaddingVal !== null) {
      let pv = pixelPaddingVal;

      if (signed) {
        // eslint-disable-next-line prefer-destructuring
        pv = new Uint8Array(new Int8Array([pixelPaddingVal]))[0];
      }

      val = `${val}if (floor(p + 0.5) == ${pv}.0) return -1.0;\n`;
    }

    if (signed) {
      val = `${val}(p > 127.0 ? p - 127.0 : p + 127.0);\n`;
    }
  } else {
    const {
      rgb
    } = image; // 2nd byte for greyscale images is packed in alpha chan,
    // or green channel for RGB based 16bit greyscale

    const byte2Chan = rgb ? "g" : "a";

    if (image.littleEndian) {
      val = `float p = (color.${byte2Chan} * 65280.0 + color.r * 255.0);\n`;
    } else {
      val = `float p = (color.r * 65280.0 + color.${byte2Chan} * 255.0);\n`;
    }

    if (pixelPaddingVal !== null) {
      let pv = pixelPaddingVal;

      if (signed) {
        // eslint-disable-next-line prefer-destructuring
        pv = new Uint16Array(new Int16Array([pixelPaddingVal]))[0];
      }

      val = `${val}if (floor(p + 0.5) == ${pv}.0) return -1.0;\n`;
    }

    if (signed) {
      val = `${val}p = (p > 32767.0 ? p - 32767.0 : p + 32767.0);\n`;
    }
  }

  return `${val}return p${divisor};`;
};
/**
 * replace placeholders in the glsl strings with proper code
 * @param info the image info we are to display
 * @param shaderString input shader program string
 * @param integerVal should getWord return a sized integer, or a 0-1 float ratio
 * @returns
 */


const preCompileGreyscaleShader = (info, shaderString, integerVal = true) => {
  let outShaderString = shaderString.replace("$(word)", glslUnpackWordString(info, integerVal));
  const {
    invert,
    pixelPaddingVal
  } = info;

  if (invert) {
    outShaderString = outShaderString.replace("// $(shouldInvert)", "grey = 1.0 - grey;");
  }

  if (pixelPaddingVal !== null) {
    outShaderString = outShaderString.replace("// $(pixelPadding)", "if (grey < 0.0) {\ngl_FragColor = vec4(0.0, 0.0, 0.0, 0.0);\nreturn;\n}\n");
  }

  return outShaderString;
};

const vertexShader$4 = "attribute vec4 position;\n\nvoid main() {\n    gl_Position = position;\n}\n";
const minMaxShader = "#extension GL_EXT_draw_buffers : require\n\nprecision mediump float;\n\n#define CELL_SIZE $(cellSize)\n\nuniform sampler2D u_minTexture;\nuniform sampler2D u_maxTexture;\nuniform vec2 u_srcResolution;\n\nfloat greyscale(vec4 color) {\n  $(word)\n}\n\nvoid main() {\n    // compute the first pixel the source cell\n    vec2 srcPixel = floor(gl_FragCoord.xy) * float(CELL_SIZE);\n\n    // one pixel in source\n    vec2 onePixel = vec2(1) / u_srcResolution;\n\n    // uv for first pixel in cell. +0.5 for center of pixel\n    vec2 uv = (srcPixel + 0.5) / u_srcResolution;\n\n    float minVal = 65535.0;\n    float maxVal = 0.0;\n    vec4 minColor = vec4(1.0, 1.0, 1.0, 1.0);\n    vec4 maxColor = vec4(0.0, 0.0, 0.0, 0.0);\n    for (int y = 0; y < CELL_SIZE; ++y) {\n        for (int x = 0; x < CELL_SIZE; ++x) {\n            vec2 off = uv + vec2(x, y) * onePixel;\n            vec4 colorMin = texture2D(u_minTexture, off);\n            float grey = greyscale(colorMin);\n            if (minVal > grey) {\n                minColor = colorMin;\n                minVal = grey;\n            }\n            vec4 colorMax = texture2D(u_maxTexture, off);\n            grey = greyscale(colorMax);\n            if (maxVal < grey) {\n                maxColor = colorMax;\n                maxVal = grey;\n            }\n        }\n    }\n\n    gl_FragData[0] = minColor;\n    gl_FragData[1] = maxColor;\n}\n";
const contrastifyShader = "precision highp float;\nuniform sampler2D u_minColor;\nuniform sampler2D u_maxColor;\nuniform sampler2D u_texture;\nuniform vec2 u_resolution;\nuniform float u_slope;\nuniform float u_intercept;\n\nfloat greyscale(vec4 color) {\n\t$(word)\n}\n\nfloat minMaxWord(vec4 color) {\n\t$(minMaxWord)\n}\n\nvoid main() {\n\tvec2 uv = gl_FragCoord.xy / u_resolution;\n\tuv.y = 1.0 - uv.y;\n\tfloat grey = greyscale(texture2D(u_texture, uv));\n\t// $(pixelPadding)\n\tfloat minColor = minMaxWord(texture2D(u_minColor, vec2(0)));\n\tfloat maxColor = minMaxWord(texture2D(u_maxColor, vec2(0)));\n\n\tgrey = grey * u_slope + u_intercept;\n\tminColor = minColor * u_slope + u_intercept;\n\tmaxColor = maxColor * u_slope + u_intercept;\n\n\tfloat ww = maxColor - minColor;\n\tfloat wc = (minColor + maxColor) / 2.0 - 0.5;\n\n\tgrey = ((grey - wc) / ww) + 0.5;\n\tgrey = clamp(grey, 0.0, 1.0);\n\n\t// $(shouldInvert)\n\tgl_FragColor = vec4(grey, grey, grey, 1);\n}\n";
const cellSize = 16;

class ContrastifyProgram {
  // eslint-disable-next-line camelcase
  static programStringForInfo(info) {
    // don't ignore pixelPaddingVal in minMax calcs
    const getMinMaxWordString = glslUnpackWordString(_extends({}, info, {
      pixelPaddingVal: null
    }), true);
    const minMaxFragString = minMaxShader.replace("$(cellSize)", cellSize.toString()).replace("$(word)", getMinMaxWordString);
    const contrastifyShaderString = preCompileGreyscaleShader(info, contrastifyShader.replace("$(minMaxWord)", getMinMaxWordString), true);
    return [minMaxFragString, contrastifyShaderString];
  }

  constructor(gl, info) {
    this.ext = void 0;
    this.minMaxProgramInfo = void 0;
    this.contrastProgramInfo = void 0;
    this.unitQuadBufferInfo = null;
    this.gl = void 0;
    const ext = gl.getExtension("WEBGL_draw_buffers");

    if (!ext) {
      throw new Error("Image requires WEBGL_draw_buffers");
    }

    this.ext = ext; // TODO: don;t double up on program string generation

    const [minMaxFrag, contrastifyFrag] = ContrastifyProgram.programStringForInfo(info);
    this.minMaxProgramInfo = twgl.createProgramInfo(gl, [vertexShader$4, minMaxFrag]);
    this.contrastProgramInfo = twgl.createProgramInfo(gl, [vertexShader$4, contrastifyFrag]);
    this.unitQuadBufferInfo = twgl.primitives.createXYQuadBufferInfo(gl);
    this.gl = gl;
  } // eslint-disable-next-line class-methods-use-this


  use() {// can't really do anything here...
  }

  run(frame, outputSize) {
    const framebuffers = [];
    const {
      gl,
      ext,
      minMaxProgramInfo,
      contrastProgramInfo,
      unitQuadBufferInfo
    } = this;
    const {
      imageInfo
    } = frame;
    const {
      size,
      slope,
      intercept
    } = imageInfo;
    const {
      width,
      height
    } = size;
    let w = width;
    let h = height;
    const srcTex = frame.texture;

    while (w > 1 || h > 1) {
      // | 0 like floor but Infinity/NaN are zero'd
      // eslint-disable-next-line no-bitwise
      w = Math.max(1, (w + cellSize - 1) / cellSize | 0); // eslint-disable-next-line no-bitwise

      h = Math.max(1, (h + cellSize - 1) / cellSize | 0); // creates a framebuffer and creates and attaches 2 RGBA/UNSIGNED textures

      const fbi = twgl.createFramebufferInfo(gl, [{
        format: gl.RGBA,
        min: gl.NEAREST,
        mag: gl.NEAREST,
        wrap: gl.CLAMP_TO_EDGE
      }, {
        format: gl.RGBA,
        min: gl.NEAREST,
        mag: gl.NEAREST,
        wrap: gl.CLAMP_TO_EDGE
      }], w, h); // WebGl2
      // gl.drawBuffers([gl.COLOR_ATTACHMENT0, gl.COLOR_ATTACHMENT1]);

      ext.drawBuffersWEBGL([ext.COLOR_ATTACHMENT0_WEBGL, ext.COLOR_ATTACHMENT1_WEBGL]);
      framebuffers.push(fbi);
    } // need separate FBs to read the output


    const lastFBI = framebuffers[framebuffers.length - 1];
    const uniforms = {
      u_srcResolution: [width, height],
      u_minTexture: srcTex,
      u_maxTexture: srcTex
    };
    gl.useProgram(minMaxProgramInfo.program);
    twgl.setBuffersAndAttributes(gl, minMaxProgramInfo, unitQuadBufferInfo);
    w = width;
    h = height;
    framebuffers.forEach(fbi => {
      // | 0 like floor but Infinity/NaN are zero'd
      // eslint-disable-next-line no-bitwise
      w = Math.max(1, (w + cellSize - 1) / cellSize | 0); // eslint-disable-next-line no-bitwise

      h = Math.max(1, (h + cellSize - 1) / cellSize | 0); // uniforms.u_dstResolution = [w, h];

      twgl.bindFramebufferInfo(gl, fbi);
      twgl.setUniforms(minMaxProgramInfo, uniforms);
      twgl.drawBufferInfo(gl, unitQuadBufferInfo);
      [uniforms.u_minTexture, uniforms.u_maxTexture] = fbi.attachments;
      uniforms.u_srcResolution = [w, h];
    }); // // Read min/max pixel onto CPU - slow but might be useful
    // const minFBI = twgl.createFramebufferInfo(gl, [
    // 	{ attachment: lastFBI.attachments[0] }
    // ], 1, 1);
    // const maxFBI = twgl.createFramebufferInfo(gl, [
    // 	{ attachment: lastFBI.attachments[1] }
    // ], 1, 1);
    // const minVals = new Uint8Array(4);
    // const maxVals = new Uint8Array(4);
    // twgl.bindFramebufferInfo(gl, minFBI);
    // gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, minVals);
    // console.log("min: ", minVals[0], minVals[1], minVals[2], minVals[3]);
    // twgl.bindFramebufferInfo(gl, maxFBI);
    // gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, maxVals);
    // console.log("max: ", maxVals[0], maxVals[1], maxVals[2], maxVals[3]);

    twgl.bindFramebufferInfo(gl, null);
    gl.useProgram(contrastProgramInfo.program);
    twgl.setUniforms(contrastProgramInfo, {
      u_resolution: [outputSize.width, outputSize.height],
      u_texture: srcTex,
      u_minColor: lastFBI.attachments[0],
      u_maxColor: lastFBI.attachments[1],
      u_slope: slope,
      u_intercept: intercept
    });
    twgl.drawBufferInfo(gl, unitQuadBufferInfo); // cleanup on next runloop

    setTimeout(() => {
      framebuffers.forEach(fbi => {
        const {
          attachments,
          framebuffer
        } = fbi;
        gl.deleteFramebuffer(framebuffer);

        if (attachments[0] instanceof WebGLRenderbuffer) {
          gl.deleteRenderbuffer(attachments[0]);
        } else {
          gl.deleteTexture(attachments[0]);
        }
      });
    }, 0);
  }

  destroy() {
    this.gl.deleteProgram(this.contrastProgramInfo.program);
    this.gl.deleteProgram(this.minMaxProgramInfo.program);
  }

} // import { IDisplayInfo } from "../image/DisplayInfo";


const vertexShader$3 = "attribute vec4 position;\n\nvoid main() {\n    gl_Position = position;\n}\n";
const colorShader = "precision highp float;\nuniform bool u_invert;\nuniform sampler2D u_texture;\nuniform vec2 u_resolution;\n\nuniform float u_slope;\nuniform float u_intercept;\n\nvec4 getPlanar(vec2 coord) {\n\tfloat third = 1.0 / 3.0;\n\tint col = int(mod(coord.y, 3.0));\n\tfloat yPos = coord.y / 3.0;\n\n\tfloat xPos = coord.x;\n\n\tvec4 red = texture2D(u_texture, vec2(xPos, yPos));\n\n\tyPos = yPos + third;\n\tvec4 green = texture2D(u_texture, vec2(xPos, yPos));\n\n\tyPos = yPos + third;\n\tvec4 blue = texture2D(u_texture, vec2(xPos, yPos));\n\n\tif (col == 0) {\n\t\treturn vec4(red.r, green.r, blue.r, 1.0);\n\t}\n\tif (col == 1) {\n\t\treturn vec4(red.g, green.g, blue.g, 1.0);\n\t}\n\tif (col == 2) {\n\t\treturn vec4(red.b, green.b, blue.b, 1.0);\n\t}\n\treturn vec4(0.0, 0.0, 0.0, 0.0);\n}\n\nvoid main() {\n\tvec4 color;\n\tvec2 uv = gl_FragCoord.xy / u_resolution;\n\tuv.y = 1.0 - uv.y;\n\n\tcolor = // $(getColor);\n\n  \tcolor = (color * u_slope) + u_intercept;\n\n\t// $(u_invert)\n\n\tgl_FragColor = color;\n}\n";

class ColorProgram {
  static programStringForInfo(imageInfo) {
    const {
      planar,
      invert
    } = imageInfo;
    let shaderString;

    if (planar) {
      shaderString = colorShader.replace("// $(getColor);", "getPlanar(uv);\n");
    } else {
      shaderString = colorShader.replace("// $(getColor);", "texture2D(u_texture, uv);\n");
    }

    if (invert) {
      shaderString = shaderString.replace("// $(u_invert)", "color = vec4(1.0 - color.r, 1.0 - color.g, 1.0 - color.b, color.a);");
    }

    return shaderString;
  } // don't need info! all non palette color images use same program


  constructor(gl, info) {
    this.programInfo = void 0;
    this.unitQuadBufferInfo = void 0;
    this.gl = void 0;
    const shaderString = ColorProgram.programStringForInfo(info);
    const programInfo = twgl.createProgramInfo(gl, [vertexShader$3, shaderString]);
    this.unitQuadBufferInfo = twgl.primitives.createXYQuadBufferInfo(gl);
    this.programInfo = programInfo;
    this.gl = gl;
  }

  use() {
    const {
      gl,
      programInfo,
      unitQuadBufferInfo
    } = this;
    twgl.bindFramebufferInfo(gl, null);
    gl.useProgram(programInfo.program);
    twgl.setBuffersAndAttributes(gl, programInfo, unitQuadBufferInfo);
  }

  run(frame, outputSize) {
    const {
      gl,
      programInfo,
      unitQuadBufferInfo
    } = this;
    const {
      invert,
      slope,
      intercept
    } = frame.imageInfo;
    const {
      texture
    } = frame;
    twgl.setUniforms(programInfo, {
      u_resolution: [outputSize.width, outputSize.height],
      u_texture: texture,
      u_invert: invert,
      u_slope: slope,
      u_intercept: intercept
    });
    twgl.drawBufferInfo(gl, unitQuadBufferInfo);
  }

  destroy() {
    this.gl.deleteProgram(this.programInfo.program);
  }

}

const vertexShader$2 = "attribute vec4 position;\n\nvoid main() {\n    gl_Position = position;\n}\n";
const greyscaleShader = "precision highp float;\nuniform sampler2D u_texture;\nuniform vec2 u_resolution;\nuniform float u_slope;\nuniform float u_intercept;\n\nuniform float u_winCenter;\nuniform float u_winWidth;\n\nfloat greyscale(vec4 color) {\n\t$(word)\n}\n\nvoid main() {\n\tvec2 uv = gl_FragCoord.xy / u_resolution;\n\tuv.y = 1.0 - uv.y;\n\n\tfloat grey = greyscale(texture2D(u_texture, uv));\n\t// $(pixelPadding)\n\tgrey = (grey * u_slope) + u_intercept;\n\n\tfloat center = u_winCenter - 0.5;\n\tfloat width = max(u_winWidth, 1.0);\n\tgrey = (grey - center) / width + 0.5;\n\tgrey = clamp(grey, 0.0, 1.0);\n\n\t// $(shouldInvert)\n\tgl_FragColor = vec4(grey, grey, grey, 1);\n}\n";

class GreyscaleProgram {
  static programStringForInfo(info) {
    return preCompileGreyscaleShader(info, greyscaleShader);
  }

  constructor(gl, info) {
    this.programInfo = void 0;
    this.unitQuadBufferInfo = null;
    this.gl = void 0;
    const greyscaleShaderString = GreyscaleProgram.programStringForInfo(info);
    const programInfo = twgl.createProgramInfo(gl, [vertexShader$2, greyscaleShaderString]);
    this.unitQuadBufferInfo = twgl.primitives.createXYQuadBufferInfo(gl);
    this.programInfo = programInfo;
    this.gl = gl;
  }

  use() {
    const {
      gl,
      programInfo,
      unitQuadBufferInfo
    } = this;
    twgl.bindFramebufferInfo(gl, null);
    gl.useProgram(programInfo.program);
    twgl.setBuffersAndAttributes(gl, programInfo, unitQuadBufferInfo);
  }

  run(frame, outputSize) {
    const {
      gl,
      unitQuadBufferInfo,
      programInfo
    } = this;
    const {
      texture,
      imageInfo
    } = frame;
    let {
      windowWidth,
      windowCenter
    } = imageInfo;
    const {
      maxPixVal,
      minPixVal,
      slope,
      intercept,
      signed,
      bitsAllocated
    } = imageInfo;

    if (!windowWidth && (maxPixVal !== null || minPixVal !== null)) {
      windowWidth = Math.abs((maxPixVal !== null && maxPixVal !== void 0 ? maxPixVal : 0) - (minPixVal !== null && minPixVal !== void 0 ? minPixVal : 0));
      windowCenter = ((maxPixVal || 0) + (minPixVal || 0)) / 2;
    }

    if (signed) {
      windowCenter = (windowCenter || 0) + 2 ** (bitsAllocated - 1);
    }

    twgl.setUniforms(programInfo, {
      u_resolution: [outputSize.width, outputSize.height],
      u_texture: texture,
      u_winWidth: windowWidth,
      u_winCenter: windowCenter,
      u_slope: slope,
      u_intercept: intercept
    });
    twgl.drawBufferInfo(gl, unitQuadBufferInfo);
  }

  destroy() {
    this.gl.deleteProgram(this.programInfo.program);
  }

}

const vertexShader$1 = "attribute vec4 position;\n\nvoid main() {\n    gl_Position = position;\n}\n";
const greyscaleLUTShader = "precision highp float;\nuniform sampler2D u_texture;\nuniform vec2 u_resolution;\nuniform sampler2D u_lutTexture;\nuniform float u_lutWidth;\nuniform float u_firstInputValue;\nuniform float u_maxValue;\n\nfloat greyscale(vec4 color) {\n\t$(word)\n}\n\nvoid main() {\n\tvec2 uv = gl_FragCoord.xy / u_resolution;\n\tuv.y = 1.0 - uv.y;\n\n\tfloat grey = greyscale(texture2D(u_texture, uv));\n\t// $(pixelPadding)\n\tfloat lutPos = (max(u_firstInputValue, grey) - u_firstInputValue);\n\tgrey = greyscale(texture2D(u_lutTexture, vec2(lutPos / u_lutWidth, 0.5))) / u_maxValue;\n\t// $(shouldInvert)\n\tgl_FragColor = vec4(grey, grey, grey, 1);\n}\n";

class GreyscaleLUTProgram {
  static programStringForInfo(info) {
    return preCompileGreyscaleShader(info, greyscaleLUTShader);
  }

  constructor(gl, info) {
    this.programInfo = void 0;
    this.unitQuadBufferInfo = null;
    this.info = void 0;
    this.gl = void 0;
    const fragShaderString = GreyscaleLUTProgram.programStringForInfo(info);
    const programInfo = twgl.createProgramInfo(gl, [vertexShader$1, fragShaderString]);
    this.programInfo = programInfo;
    this.gl = gl;
    this.info = info;
  }

  use() {
    const {
      gl,
      programInfo
    } = this; // can this be reused?

    const unitQuadBufferInfo = twgl.primitives.createXYQuadBufferInfo(gl);
    twgl.bindFramebufferInfo(gl, null);
    gl.useProgram(programInfo.program);
    twgl.setBuffersAndAttributes(gl, programInfo, unitQuadBufferInfo);
    this.unitQuadBufferInfo = unitQuadBufferInfo;
  }

  run(frame, outputSize) {
    const {
      gl,
      unitQuadBufferInfo,
      programInfo,
      info
    } = this;
    const {
      texture,
      imageInfo
    } = frame;
    const {
      lut
    } = imageInfo;
    let format = gl.LUMINANCE_ALPHA;
    let internalFormat = gl.LUMINANCE_ALPHA;

    if (info.bitsAllocated <= 8) {
      format = gl.LUMINANCE;
      internalFormat = gl.LUMINANCE;
    } // 1D tex


    const lutTexture = twgl.createTexture(gl, {
      src: new Uint8Array(lut.data.buffer),
      width: lut.data.length,
      height: 1,
      format,
      internalFormat,
      type: gl.UNSIGNED_BYTE,
      min: gl.NEAREST,
      mag: gl.NEAREST,
      wrap: gl.CLAMP_TO_EDGE
    });
    twgl.setUniforms(programInfo, {
      u_resolution: [outputSize.width, outputSize.height],
      u_texture: texture,
      u_lutTexture: lutTexture,
      u_lutWidth: lut.data.length,
      u_firstInputValue: lut.firstValue,
      u_maxValue: 2 ** info.bitsStored
    });
    twgl.drawBufferInfo(gl, unitQuadBufferInfo);
    setTimeout(() => {
      gl.deleteTexture(lutTexture);
    }, 0);
  }

  destroy() {
    const {
      gl
    } = this;
    gl.deleteProgram(this.programInfo.program);
  }

}

const vertexShader = "attribute vec4 position;\n\nvoid main() {\n    gl_Position = position;\n}\n";
const colorPaletteShader = "precision highp float;\nuniform bool u_invert;\nuniform sampler2D u_texture;\nuniform vec2 u_resolution;\nuniform sampler2D u_redTexture;\nuniform sampler2D u_greenTexture;\nuniform sampler2D u_blueTexture;\nuniform float u_paletteWidthRatio;\n\nfloat getWord(vec4 color) {\n\t$(word)\n}\n\nfloat getPaletteWord(vec4 color) {\n\t$(paletteWord)\n}\n\nvoid main() {\n\tvec2 uv = gl_FragCoord.xy / u_resolution;\n\tuv.y = 1.0 - uv.y;\n\n\tfloat palettePos = getWord(texture2D(u_texture, uv)) * u_paletteWidthRatio;\n\n\tfloat red = getPaletteWord(texture2D(u_redTexture, vec2( palettePos, 0.5)));\n\tfloat green = getPaletteWord(texture2D(u_greenTexture, vec2(palettePos, 0.5)));\n\tfloat blue = getPaletteWord(texture2D(u_blueTexture, vec2(palettePos, 0.5)));\n\n\tvec4 color = vec4(red, green, blue, 1.0);\n\tif (u_invert) {\n\t\tcolor = vec4(1.0 - color.r, 1.0 - color.g, 1.0 - color.b, 1.0);\n\t}\n\n\tgl_FragColor = color;\n}\n";

class ColorPaletteProgram {
  static programStringForInfo(info) {
    const {
      palette
    } = info;
    const getWordString = glslUnpackWordString(info, false);
    const getPaletteWordString = glslUnpackWordString(_extends({}, info, {
      rgb: false,
      bitsAllocated: palette.bitsAllocated,
      bitsStored: palette.bitsAllocated
    }), false);
    return colorPaletteShader.replace("$(word)", getWordString).replace("$(paletteWord)", getPaletteWordString);
  }

  constructor(gl, info) {
    this.programInfo = void 0;
    this.unitQuadBufferInfo = void 0;
    this.gl = void 0;
    const programString = ColorPaletteProgram.programStringForInfo(info);
    const programInfo = twgl.createProgramInfo(gl, [vertexShader, programString]);
    this.programInfo = programInfo;
    this.gl = gl; // can this be reused?

    this.unitQuadBufferInfo = twgl.primitives.createXYQuadBufferInfo(gl);
  }

  use() {
    const {
      gl,
      programInfo,
      unitQuadBufferInfo
    } = this;
    twgl.bindFramebufferInfo(gl, null);
    gl.useProgram(programInfo.program);
    twgl.setBuffersAndAttributes(gl, programInfo, unitQuadBufferInfo);
  }

  run(frame, outputSize) {
    const {
      gl,
      unitQuadBufferInfo,
      programInfo
    } = this;
    const {
      texture,
      imageInfo
    } = frame;
    const {
      palette,
      invert,
      bitsAllocated
    } = imageInfo;
    let format = gl.LUMINANCE_ALPHA;
    let internalFormat = gl.LUMINANCE_ALPHA;

    if (palette.bitsAllocated === 8) {
      format = gl.LUMINANCE;
      internalFormat = gl.LUMINANCE;
    }

    const {
      r,
      g,
      b,
      nEntries
    } = palette; // 1D tex

    const red = twgl.createTexture(gl, {
      src: new Uint8Array(r.buffer, r.byteOffset, r.byteLength),
      width: nEntries,
      height: 1,
      format,
      internalFormat,
      type: gl.UNSIGNED_BYTE,
      min: gl.NEAREST,
      mag: gl.NEAREST,
      wrap: gl.CLAMP_TO_EDGE
    });
    const green = twgl.createTexture(gl, {
      src: new Uint8Array(g.buffer, g.byteOffset, g.byteLength),
      width: nEntries,
      height: 1,
      format,
      internalFormat,
      type: gl.UNSIGNED_BYTE,
      min: gl.NEAREST,
      mag: gl.NEAREST,
      wrap: gl.CLAMP_TO_EDGE
    });
    const blue = twgl.createTexture(gl, {
      src: new Uint8Array(b.buffer, b.byteOffset, b.byteLength),
      width: nEntries,
      height: 1,
      format,
      internalFormat,
      type: gl.UNSIGNED_BYTE,
      min: gl.NEAREST,
      mag: gl.NEAREST,
      wrap: gl.CLAMP_TO_EDGE
    });
    twgl.setUniforms(programInfo, {
      u_resolution: [outputSize.width, outputSize.height],
      u_texture: texture,
      u_redTexture: red,
      u_greenTexture: green,
      u_blueTexture: blue,
      u_paletteWidthRatio: 2 ** bitsAllocated / palette.nEntries,
      u_invert: invert
    });
    twgl.drawBufferInfo(gl, unitQuadBufferInfo);
    setTimeout(() => {
      gl.deleteTexture(red);
      gl.deleteTexture(green);
      gl.deleteTexture(blue);
    });
  }

  destroy() {
    const {
      gl,
      programInfo
    } = this;
    gl.deleteProgram(programInfo.program);
  }

}

class Renderer {
  constructor(inCanvas) {
    var _document;

    this.canvas = void 0;
    this.image = null;
    this.gl = void 0;
    this.decoder = null;
    this.program = null;
    this.outSize = null;
    this.programCacheMap = void 0;
    const canvas = inCanvas || ((_document = document) === null || _document === void 0 ? void 0 : _document.createElement("canvas")) || new HTMLCanvasElement();
    const gl = canvas.getContext("webgl");

    if (!gl) {
      throw Error("could not create webgl from canvas");
    }

    this.canvas = canvas;
    this.gl = gl;
    this.programCacheMap = new Map();
  }
  /**
   * prime the renderer with specific programs
   * this can improve 1st image render time quite dramatically
   * @param programType
   */


  primeGreyscale(programType) {
    var _ref;

    const {
      hasLut,
      invert,
      signed,
      bitsAllocated,
      bitsStored,
      littleEndian,
      hasPixelPaddingValue,
      knownWindow
    } = programType;
    const imageType = {
      image: new DCMImage(),
      nFrames: 1,
      rgb: false,
      planar: false,
      signed: signed !== null && signed !== void 0 ? signed : false,
      size: new ImageSize({
        width: 0,
        height: 0
      }),
      codec: Codec.Uncompressed,
      samples: 0,
      bitsAllocated: bitsAllocated !== null && bitsAllocated !== void 0 ? bitsAllocated : 16,
      bytesAllocated: (bitsAllocated !== null && bitsAllocated !== void 0 ? bitsAllocated : 16) / 8,
      bitsStored: (_ref = bitsStored !== null && bitsStored !== void 0 ? bitsStored : bitsAllocated) !== null && _ref !== void 0 ? _ref : 16,
      littleEndian: littleEndian !== null && littleEndian !== void 0 ? littleEndian : true,
      data: new DataView(new ArrayBuffer(0)),
      lut: hasLut ? {
        nEntries: 0,
        firstValue: 0,
        bitsStored: 0,
        data: new Uint8Array(0)
      } : null,
      palette: null,
      invert: invert !== null && invert !== void 0 ? invert : false,
      pixelPaddingVal: hasPixelPaddingValue ? 1 : null,
      minPixVal: null,
      maxPixVal: null,
      windowCenter: knownWindow ? 0.5 : null,
      windowWidth: knownWindow ? 1 : null,
      slope: 1,
      intercept: 0
    };
    this.getProgram(imageType);
  }
  /**
   * prime the renderer with specific programs
   * this can improve 1st image render time quite dramatically
   * @param programType
   */


  primeColor(programType) {
    const {
      planar,
      bitsAllocated,
      signed,
      littleEndian,
      hasPaletteWithWordBits,
      invert
    } = programType;
    const imageType = {
      image: new DCMImage(),
      nFrames: 1,
      rgb: true,
      planar: planar !== null && planar !== void 0 ? planar : false,
      signed: signed !== null && signed !== void 0 ? signed : false,
      size: new ImageSize({
        width: 0,
        height: 0
      }),
      codec: Codec.Uncompressed,
      samples: 3,
      bitsAllocated,
      bytesAllocated: bitsAllocated / 8,
      bitsStored: bitsAllocated,
      littleEndian: littleEndian !== null && littleEndian !== void 0 ? littleEndian : true,
      data: new DataView(new ArrayBuffer(0)),
      lut: null,
      palette: hasPaletteWithWordBits ? {
        nEntries: 0,
        firstValue: 0,
        bitsAllocated: hasPaletteWithWordBits,
        r: new DataView(new ArrayBuffer(0)),
        g: new DataView(new ArrayBuffer(0)),
        b: new DataView(new ArrayBuffer(0))
      } : null,
      invert: invert !== null && invert !== void 0 ? invert : false,
      pixelPaddingVal: null,
      minPixVal: null,
      maxPixVal: null,
      windowCenter: null,
      windowWidth: null,
      slope: 1,
      intercept: 0
    };
    this.getProgram(imageType);
  }
  /**
   * render the image frame to the canvas
   * @param image parsed DCMImage
   * @param frameNo the frame index
   */


  async render(image, frameNo = 0) {
    const {
      gl,
      canvas
    } = this;

    if (!this.outSize) {
      this.outSize = new ImageSize(image);
    }

    const size = this.outSize;

    if (size.width !== canvas.width || size.height !== canvas.height) {
      canvas.width = 1; // near zero the canvas, makes resize much faste!

      canvas.height = 1;
      canvas.width = size.width;
      canvas.height = size.height;
    }

    if (this.image !== image) {
      this.image = image;
      const decoder = decoderForImage(image);
      decoder.outputSize = new ImageSize(image);
      const imageInfo = decoder.image;
      const program = this.getProgram(imageInfo);
      program.use();
      this.program = program;
      this.decoder = decoder;
    }

    const frame = await this.decoder.getFrame(gl, frameNo);
    this.program.run(frame, size);
    setTimeout(() => {
      frame.destroy();
    }, 0);
  }

  set outputSize(size) {
    this.outSize = new ImageSize(size);
  }

  get outputSize() {
    if (this.outSize) {
      return this.outSize;
    }

    return new ImageSize({
      width: 0,
      height: 0
    });
  }

  clear() {
    const {
      gl,
      canvas
    } = this;
    canvas.width = 0; // zero the canvas, makes resize much faster!

    canvas.height = 0; // eslint-disable-next-line no-bitwise

    gl.clear(gl.DEPTH_BUFFER_BIT | gl.COLOR_BUFFER_BIT);
  }

  destroy(aggressive = false) {
    this.programCacheMap.forEach(program => {
      program.destroy();
    });
    this.programCacheMap = new Map();
    this.program = null;
    this.image = null;

    if (aggressive) {
      var _this$gl$getExtension; // https://stackoverflow.com/questions/23598471/how-do-i-clean-up-and-unload-a-webgl-canvas-context-from-gpu-after-use


      (_this$gl$getExtension = this.gl.getExtension("WEBGL_lose_context")) === null || _this$gl$getExtension === void 0 ? void 0 : _this$gl$getExtension.loseContext();
      this.canvas.width = 1;
      this.canvas.height = 1;
    }
  }

  getProgram(imageInfo) {
    const {
      gl
    } = this;
    let signature = null;

    if (imageInfo.palette) {
      signature = {
        hash: (0, _sha.default)(ColorPaletteProgram.programStringForInfo(imageInfo)).toString(),
        Type: ColorPaletteProgram
      };
    } else if (imageInfo.rgb) {
      signature = {
        hash: (0, _sha.default)(ColorProgram.programStringForInfo(imageInfo)).toString(),
        Type: ColorProgram
      };
    } else if (imageInfo.windowCenter || imageInfo.minPixVal || imageInfo.maxPixVal) {
      signature = {
        hash: (0, _sha.default)(GreyscaleProgram.programStringForInfo(imageInfo)).toString(),
        Type: GreyscaleProgram
      };
    } else if (imageInfo.lut) {
      signature = {
        hash: (0, _sha.default)(GreyscaleLUTProgram.programStringForInfo(imageInfo)).toString(),
        Type: GreyscaleLUTProgram
      };
    } else {
      const [s0, s1] = ContrastifyProgram.programStringForInfo(imageInfo);
      signature = {
        hash: (0, _sha.default)(s0 + s1).toString(),
        Type: ContrastifyProgram
      };
    }

    let program = this.programCacheMap.get(signature.hash);

    if (!program) {
      program = new signature.Type(gl, imageInfo);
      this.programCacheMap.set(signature.hash, program);
    }

    return program;
  }

}

exports.Renderer = Renderer;

const render = async (image, canvas, scale = 1.0) => {
  if (!image) {
    return Promise.reject(Series.parserError);
  }

  const renderer = new Renderer(canvas);
  const outSize = new ImageSize(image).scale(scale);
  renderer.outputSize = outSize;
  await renderer.render(image, 0);
  renderer.destroy();
  return Promise.resolve();
};

exports.render = render;

},{"@wearemothership/dicom-character-set":2,"jpeg-lossless-decoder-js":13,"pako":18,"sha1":19,"twgl.js":20}],2:[function(require,module,exports){
/*! @wearemothership/dicom-character-set - 1.0.4-opt.1 - 2021-03-22 | (c) 2018 Radialogica, LLC | https://github.com/radialogica/dicom-character-set */
!function(e,n){"object"==typeof exports&&"object"==typeof module?module.exports=n():"function"==typeof define&&define.amd?define([],n):"object"==typeof exports?exports["dicom-character-set"]=n():e["dicom-character-set"]=n()}(this,function(){return(()=>{"use strict";var o={d:(e,n)=>{for(var t in n)o.o(n,t)&&!o.o(e,t)&&Object.defineProperty(e,t,{enumerable:!0,get:n[t]})},o:(e,n)=>Object.prototype.hasOwnProperty.call(e,n),r:e=>{"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})}},e={};o.r(e),o.d(e,{characterSets:()=>i,convertBytes:()=>function(e,n,t){return g(y,r,e,n,t)},convertBytesPromise:()=>function(e,n,t){return g(P,m,e,n,t)}});var n={codeElement:"G0",escapeSequence:[27,40,66],encoding:"windows-1252",isASCII:!0,bytesPerCodePoint:1},i={"ISO_IR 6":{encoding:"utf-8"},"ISO_IR 100":{encoding:"windows-1252"},"ISO_IR 101":{encoding:"iso-8859-2"},"ISO_IR 109":{encoding:"iso-8859-3"},"ISO_IR 110":{encoding:"iso-8859-4"},"ISO_IR 144":{encoding:"iso-8859-5"},"ISO_IR 127":{encoding:"iso-8859-6"},"ISO_IR 126":{encoding:"iso-8859-7"},"ISO_IR 138":{encoding:"iso-8859-8"},"ISO_IR 148":{encoding:"windows-1254"},"ISO_IR 13":{encoding:"shift-jis"},"ISO_IR 166":{encoding:"tis-620"},"ISO 2022 IR 6":{extension:!0,elements:[n]},"ISO 2022 IR 100":{extension:!0,elements:[n,{codeElement:"G1",escapeSequence:[27,45,65],encoding:"windows-1252",bytesPerCodePoint:1}]},"ISO 2022 IR 101":{extension:!0,elements:[n,{codeElement:"G1",escapeSequence:[27,45,66],encoding:"iso-8859-2",bytesPerCodePoint:1}]},"ISO 2022 IR 109":{extension:!0,elements:[n,{codeElement:"G1",escapeSequence:[27,45,67],encoding:"iso-8859-3",bytesPerCodePoint:1}]},"ISO 2022 IR 110":{extension:!0,elements:[n,{codeElement:"G1",escapeSequence:[27,45,68],encoding:"iso-8859-4",bytesPerCodePoint:1}]},"ISO 2022 IR 144":{extension:!0,elements:[n,{codeElement:"G1",escapeSequence:[27,45,76],encoding:"iso-8859-5",bytesPerCodePoint:1}]},"ISO 2022 IR 127":{extension:!0,elements:[n,{codeElement:"G1",escapeSequence:[27,45,71],encoding:"iso-8859-6",bytesPerCodePoint:1}]},"ISO 2022 IR 126":{extension:!0,elements:[n,{codeElement:"G1",escapeSequence:[27,45,70],encoding:"iso-8859-7",bytesPerCodePoint:1}]},"ISO 2022 IR 138":{extension:!0,elements:[n,{codeElement:"G1",escapeSequence:[27,45,72],encoding:"iso-8859-8",bytesPerCodePoint:1}]},"ISO 2022 IR 148":{extension:!0,elements:[n,{codeElement:"G1",escapeSequence:[27,45,77],encoding:"windows-1254",bytesPerCodePoint:1}]},"ISO 2022 IR 13":{extension:!0,elements:[{codeElement:"G0",escapeSequence:[27,40,74],encoding:"shift-jis",bytesPerCodePoint:1},{codeElement:"G1",escapeSequence:[27,41,73],encoding:"shift-jis",bytesPerCodePoint:1}]},"ISO 2022 IR 166":{extension:!0,elements:[n,{codeElement:"G1",escapeSequence:[27,45,84],encoding:"tis-620",bytesPerCodePoint:1}]},"ISO 2022 IR 87":{extension:!0,multiByte:!0,elements:[{codeElement:"G0",escapeSequence:[27,36,66],encoding:"euc-jp",setHighBit:!0,bytesPerCodePoint:2}]},"ISO 2022 IR 159":{extension:!0,multiByte:!0,elements:[{codeElement:"G0",escapeSequence:[27,36,40,68],encoding:"euc-jp",isJISX0212:!0,bytesPerCodePoint:2}]},"ISO 2022 IR 149":{extension:!0,multiByte:!0,elements:[{codeElement:"G1",escapeSequence:[27,36,41,67],encoding:"euc-kr",bytesPerCodePoint:2}]},"ISO 2022 IR 58":{extension:!0,multiByte:!0,elements:[{codeElement:"G1",escapeSequence:[27,36,41,65],encoding:"gb18030",bytesPerCodePoint:2}]},"ISO_IR 192":{encoding:"utf-8",multiByte:!0},GB18030:{encoding:"gb18030",multiByte:!0},GBK:{encoding:"gbk",multiByte:!0}},l=27,c=10,s=12,u=13,d=9,a=92,f=61,I=94;function S(e){return e.replace(/~/g,"‾").replace(/\\/g,"¥")}function r(e,n,t,o,r){r=b(n,t,o,r);return e+y(n.encoding,r)}function m(e,t,n,o,r){var i=b(t,n,o,r);return(""===e?Promise.resolve(""):e).then(function(n){return P(t.encoding,i).then(function(e){return n+e})})}function g(e,n,t,o,r){!function(e,n){if(n&&!(n instanceof Uint8Array))throw new Error("bytes must be a Uint8Array");if(e&&"string"!=typeof e)throw new Error("specificCharacterSet must be a string")}(t,o);t=function(e){e=e?e.split("\\").map(function(e){return e.trim().toUpperCase()}):[""];""===e[0]&&(e[0]=1<e.length?"ISO 2022 IR 6":"ISO_IR 6");if(e.some(function(e){return void 0===i[e]}))throw new Error("Invalid specific character set specified.");return function(e){for(var n=1<e.length,t=[],o=0;o<e.length;o++){var r=e[o];t.includes(r)||t.push(n?r.replace("ISO_IR","ISO 2022 IR"):r)}return t}(e=function(e){var n=i[e[0]];return!n.multiByte||n.extension?e.filter(function(e){return!i[e].multiByte||i[e].extension}):[e[0]]}(e))}(t);if(1===t.length&&!t[0].startsWith("ISO 2022"))return e(i[t[0]].encoding,o);r=r||{};return function(e,n,t,o){var r="";if(!n||0===n.length)return r;var i={G0:e[0].elements.find(function(e){return"G0"===e.codeElement}),G1:e[0].elements.find(function(e){return"G1"===e.codeElement})},c=Object.assign({},i),s=0,u=void 0,d=0;for(;d<n.length;){u=u||h(n[s],c);var a=function(e,n,t,o,r,i){for(var c=n;c<e.length;c+=t.bytesPerCodePoint){if(e[c]===l)return{escapeSequence:!0,index:c};1===t.bytesPerCodePoint&&i.includes(e[c])&&Object.assign(o,r);var s=h(e[c],o);if(t&&s!==t)return{characterSet:s,index:c}}return{index:e.length}}(n,s,u,c,i,t);d=a.index,s<d&&(r=o(r,u,n,s,d)),s=d,u=a.characterSet,a.escapeSequence&&(a=function(e,n,t){for(var o=0;o<t.length;o++)for(var r=t[o],i=0;i<r.elements.length;i++){var c=r.elements[i];if(function(e,n,t){for(var o=0;o<e.length;o++){if(t+o>=n.length)return!1;if(n[t+o]!==e[o])return!1}return!0}(c.escapeSequence,e,n))return c}throw new Error("Unknown escape sequence encountered at byte "+n)}(n,d,e),c[a.codeElement]=a,s+=a.escapeSequence.length)}return r}(t.map(function(e){return i[e]}),o,function(e){var n=(e||"").trim().toUpperCase(),e=[c,s,u,d];["UT","ST","LT"].includes(n)||e.push(a);"PN"===n&&(e.push(f),e.push(I));return e}(r.vr),n)}var p={};function y(e,n){var t=p[e];return t||(t=new TextDecoder(e),p[e]=t="shift-jis"===e?{textDecoder:t,decode:function(e){return S(t.decode(e))}}:t),t.decode(n)}function P(o,r){return new Promise(function(e){var n=new FileReader;n.onload="shift-jis"===o?function(){return e(S(n.result))}:function(){return e(n.result)};var t=new Blob([r]);n.readAsText(t,o)})}function h(e,n){return 127<e&&n.G1?n.G1:n.G0||(n.G1&&1===n.G1.bytesPerCodePoint?n.G1:i["ISO 2022 IR 6"].elements[0])}function b(e,n,t,o){var r=void 0;return e.isJISX0212?r=function(e,n,t){var o=t-n;if(o%2!=0)throw new Error("JIS X string with a character not having exactly two bytes!");for(var r=new Uint8Array(o+o/2),i=0,c=n;c<t;c+=2)r[i++]=143,r[i++]=128|e[c],r[i++]=128|e[c+1];return r}(n,t,o):((r=new Uint8Array(o-t)).set(new Uint8Array(n.buffer,n.byteOffset+t,o-t)),e.setHighBit&&function(e){for(var n=0;n<e.length;n++)e[n]|=128}(r)),r}return e})()});

},{}],3:[function(require,module,exports){
'use strict'

exports.byteLength = byteLength
exports.toByteArray = toByteArray
exports.fromByteArray = fromByteArray

var lookup = []
var revLookup = []
var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array

var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
for (var i = 0, len = code.length; i < len; ++i) {
  lookup[i] = code[i]
  revLookup[code.charCodeAt(i)] = i
}

// Support decoding URL-safe base64 strings, as Node.js does.
// See: https://en.wikipedia.org/wiki/Base64#URL_applications
revLookup['-'.charCodeAt(0)] = 62
revLookup['_'.charCodeAt(0)] = 63

function getLens (b64) {
  var len = b64.length

  if (len % 4 > 0) {
    throw new Error('Invalid string. Length must be a multiple of 4')
  }

  // Trim off extra bytes after placeholder bytes are found
  // See: https://github.com/beatgammit/base64-js/issues/42
  var validLen = b64.indexOf('=')
  if (validLen === -1) validLen = len

  var placeHoldersLen = validLen === len
    ? 0
    : 4 - (validLen % 4)

  return [validLen, placeHoldersLen]
}

// base64 is 4/3 + up to two characters of the original data
function byteLength (b64) {
  var lens = getLens(b64)
  var validLen = lens[0]
  var placeHoldersLen = lens[1]
  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
}

function _byteLength (b64, validLen, placeHoldersLen) {
  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
}

function toByteArray (b64) {
  var tmp
  var lens = getLens(b64)
  var validLen = lens[0]
  var placeHoldersLen = lens[1]

  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))

  var curByte = 0

  // if there are placeholders, only get up to the last complete 4 chars
  var len = placeHoldersLen > 0
    ? validLen - 4
    : validLen

  var i
  for (i = 0; i < len; i += 4) {
    tmp =
      (revLookup[b64.charCodeAt(i)] << 18) |
      (revLookup[b64.charCodeAt(i + 1)] << 12) |
      (revLookup[b64.charCodeAt(i + 2)] << 6) |
      revLookup[b64.charCodeAt(i + 3)]
    arr[curByte++] = (tmp >> 16) & 0xFF
    arr[curByte++] = (tmp >> 8) & 0xFF
    arr[curByte++] = tmp & 0xFF
  }

  if (placeHoldersLen === 2) {
    tmp =
      (revLookup[b64.charCodeAt(i)] << 2) |
      (revLookup[b64.charCodeAt(i + 1)] >> 4)
    arr[curByte++] = tmp & 0xFF
  }

  if (placeHoldersLen === 1) {
    tmp =
      (revLookup[b64.charCodeAt(i)] << 10) |
      (revLookup[b64.charCodeAt(i + 1)] << 4) |
      (revLookup[b64.charCodeAt(i + 2)] >> 2)
    arr[curByte++] = (tmp >> 8) & 0xFF
    arr[curByte++] = tmp & 0xFF
  }

  return arr
}

function tripletToBase64 (num) {
  return lookup[num >> 18 & 0x3F] +
    lookup[num >> 12 & 0x3F] +
    lookup[num >> 6 & 0x3F] +
    lookup[num & 0x3F]
}

function encodeChunk (uint8, start, end) {
  var tmp
  var output = []
  for (var i = start; i < end; i += 3) {
    tmp =
      ((uint8[i] << 16) & 0xFF0000) +
      ((uint8[i + 1] << 8) & 0xFF00) +
      (uint8[i + 2] & 0xFF)
    output.push(tripletToBase64(tmp))
  }
  return output.join('')
}

function fromByteArray (uint8) {
  var tmp
  var len = uint8.length
  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
  var parts = []
  var maxChunkLength = 16383 // must be multiple of 3

  // go through the array every three bytes, we'll deal with trailing stuff later
  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
    parts.push(encodeChunk(uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)))
  }

  // pad the end with zeros, but make sure to not forget the extra bytes
  if (extraBytes === 1) {
    tmp = uint8[len - 1]
    parts.push(
      lookup[tmp >> 2] +
      lookup[(tmp << 4) & 0x3F] +
      '=='
    )
  } else if (extraBytes === 2) {
    tmp = (uint8[len - 2] << 8) + uint8[len - 1]
    parts.push(
      lookup[tmp >> 10] +
      lookup[(tmp >> 4) & 0x3F] +
      lookup[(tmp << 2) & 0x3F] +
      '='
    )
  }

  return parts.join('')
}

},{}],4:[function(require,module,exports){
(function (Buffer){(function (){
/*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <https://feross.org>
 * @license  MIT
 */
/* eslint-disable no-proto */

'use strict'

var base64 = require('base64-js')
var ieee754 = require('ieee754')

exports.Buffer = Buffer
exports.SlowBuffer = SlowBuffer
exports.INSPECT_MAX_BYTES = 50

var K_MAX_LENGTH = 0x7fffffff
exports.kMaxLength = K_MAX_LENGTH

/**
 * If `Buffer.TYPED_ARRAY_SUPPORT`:
 *   === true    Use Uint8Array implementation (fastest)
 *   === false   Print warning and recommend using `buffer` v4.x which has an Object
 *               implementation (most compatible, even IE6)
 *
 * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
 * Opera 11.6+, iOS 4.2+.
 *
 * We report that the browser does not support typed arrays if the are not subclassable
 * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
 * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
 * for __proto__ and has a buggy typed array implementation.
 */
Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()

if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
    typeof console.error === 'function') {
  console.error(
    'This browser lacks typed array (Uint8Array) support which is required by ' +
    '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'
  )
}

function typedArraySupport () {
  // Can typed array instances can be augmented?
  try {
    var arr = new Uint8Array(1)
    arr.__proto__ = { __proto__: Uint8Array.prototype, foo: function () { return 42 } }
    return arr.foo() === 42
  } catch (e) {
    return false
  }
}

Object.defineProperty(Buffer.prototype, 'parent', {
  enumerable: true,
  get: function () {
    if (!Buffer.isBuffer(this)) return undefined
    return this.buffer
  }
})

Object.defineProperty(Buffer.prototype, 'offset', {
  enumerable: true,
  get: function () {
    if (!Buffer.isBuffer(this)) return undefined
    return this.byteOffset
  }
})

function createBuffer (length) {
  if (length > K_MAX_LENGTH) {
    throw new RangeError('The value "' + length + '" is invalid for option "size"')
  }
  // Return an augmented `Uint8Array` instance
  var buf = new Uint8Array(length)
  buf.__proto__ = Buffer.prototype
  return buf
}

/**
 * The Buffer constructor returns instances of `Uint8Array` that have their
 * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
 * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
 * and the `Uint8Array` methods. Square bracket notation works as expected -- it
 * returns a single octet.
 *
 * The `Uint8Array` prototype remains unmodified.
 */

function Buffer (arg, encodingOrOffset, length) {
  // Common case.
  if (typeof arg === 'number') {
    if (typeof encodingOrOffset === 'string') {
      throw new TypeError(
        'The "string" argument must be of type string. Received type number'
      )
    }
    return allocUnsafe(arg)
  }
  return from(arg, encodingOrOffset, length)
}

// Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
if (typeof Symbol !== 'undefined' && Symbol.species != null &&
    Buffer[Symbol.species] === Buffer) {
  Object.defineProperty(Buffer, Symbol.species, {
    value: null,
    configurable: true,
    enumerable: false,
    writable: false
  })
}

Buffer.poolSize = 8192 // not used by this implementation

function from (value, encodingOrOffset, length) {
  if (typeof value === 'string') {
    return fromString(value, encodingOrOffset)
  }

  if (ArrayBuffer.isView(value)) {
    return fromArrayLike(value)
  }

  if (value == null) {
    throw TypeError(
      'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
      'or Array-like Object. Received type ' + (typeof value)
    )
  }

  if (isInstance(value, ArrayBuffer) ||
      (value && isInstance(value.buffer, ArrayBuffer))) {
    return fromArrayBuffer(value, encodingOrOffset, length)
  }

  if (typeof value === 'number') {
    throw new TypeError(
      'The "value" argument must not be of type number. Received type number'
    )
  }

  var valueOf = value.valueOf && value.valueOf()
  if (valueOf != null && valueOf !== value) {
    return Buffer.from(valueOf, encodingOrOffset, length)
  }

  var b = fromObject(value)
  if (b) return b

  if (typeof Symbol !== 'undefined' && Symbol.toPrimitive != null &&
      typeof value[Symbol.toPrimitive] === 'function') {
    return Buffer.from(
      value[Symbol.toPrimitive]('string'), encodingOrOffset, length
    )
  }

  throw new TypeError(
    'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
    'or Array-like Object. Received type ' + (typeof value)
  )
}

/**
 * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
 * if value is a number.
 * Buffer.from(str[, encoding])
 * Buffer.from(array)
 * Buffer.from(buffer)
 * Buffer.from(arrayBuffer[, byteOffset[, length]])
 **/
Buffer.from = function (value, encodingOrOffset, length) {
  return from(value, encodingOrOffset, length)
}

// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
// https://github.com/feross/buffer/pull/148
Buffer.prototype.__proto__ = Uint8Array.prototype
Buffer.__proto__ = Uint8Array

function assertSize (size) {
  if (typeof size !== 'number') {
    throw new TypeError('"size" argument must be of type number')
  } else if (size < 0) {
    throw new RangeError('The value "' + size + '" is invalid for option "size"')
  }
}

function alloc (size, fill, encoding) {
  assertSize(size)
  if (size <= 0) {
    return createBuffer(size)
  }
  if (fill !== undefined) {
    // Only pay attention to encoding if it's a string. This
    // prevents accidentally sending in a number that would
    // be interpretted as a start offset.
    return typeof encoding === 'string'
      ? createBuffer(size).fill(fill, encoding)
      : createBuffer(size).fill(fill)
  }
  return createBuffer(size)
}

/**
 * Creates a new filled Buffer instance.
 * alloc(size[, fill[, encoding]])
 **/
Buffer.alloc = function (size, fill, encoding) {
  return alloc(size, fill, encoding)
}

function allocUnsafe (size) {
  assertSize(size)
  return createBuffer(size < 0 ? 0 : checked(size) | 0)
}

/**
 * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
 * */
Buffer.allocUnsafe = function (size) {
  return allocUnsafe(size)
}
/**
 * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
 */
Buffer.allocUnsafeSlow = function (size) {
  return allocUnsafe(size)
}

function fromString (string, encoding) {
  if (typeof encoding !== 'string' || encoding === '') {
    encoding = 'utf8'
  }

  if (!Buffer.isEncoding(encoding)) {
    throw new TypeError('Unknown encoding: ' + encoding)
  }

  var length = byteLength(string, encoding) | 0
  var buf = createBuffer(length)

  var actual = buf.write(string, encoding)

  if (actual !== length) {
    // Writing a hex string, for example, that contains invalid characters will
    // cause everything after the first invalid character to be ignored. (e.g.
    // 'abxxcd' will be treated as 'ab')
    buf = buf.slice(0, actual)
  }

  return buf
}

function fromArrayLike (array) {
  var length = array.length < 0 ? 0 : checked(array.length) | 0
  var buf = createBuffer(length)
  for (var i = 0; i < length; i += 1) {
    buf[i] = array[i] & 255
  }
  return buf
}

function fromArrayBuffer (array, byteOffset, length) {
  if (byteOffset < 0 || array.byteLength < byteOffset) {
    throw new RangeError('"offset" is outside of buffer bounds')
  }

  if (array.byteLength < byteOffset + (length || 0)) {
    throw new RangeError('"length" is outside of buffer bounds')
  }

  var buf
  if (byteOffset === undefined && length === undefined) {
    buf = new Uint8Array(array)
  } else if (length === undefined) {
    buf = new Uint8Array(array, byteOffset)
  } else {
    buf = new Uint8Array(array, byteOffset, length)
  }

  // Return an augmented `Uint8Array` instance
  buf.__proto__ = Buffer.prototype
  return buf
}

function fromObject (obj) {
  if (Buffer.isBuffer(obj)) {
    var len = checked(obj.length) | 0
    var buf = createBuffer(len)

    if (buf.length === 0) {
      return buf
    }

    obj.copy(buf, 0, 0, len)
    return buf
  }

  if (obj.length !== undefined) {
    if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) {
      return createBuffer(0)
    }
    return fromArrayLike(obj)
  }

  if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
    return fromArrayLike(obj.data)
  }
}

function checked (length) {
  // Note: cannot use `length < K_MAX_LENGTH` here because that fails when
  // length is NaN (which is otherwise coerced to zero.)
  if (length >= K_MAX_LENGTH) {
    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
                         'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes')
  }
  return length | 0
}

function SlowBuffer (length) {
  if (+length != length) { // eslint-disable-line eqeqeq
    length = 0
  }
  return Buffer.alloc(+length)
}

Buffer.isBuffer = function isBuffer (b) {
  return b != null && b._isBuffer === true &&
    b !== Buffer.prototype // so Buffer.isBuffer(Buffer.prototype) will be false
}

Buffer.compare = function compare (a, b) {
  if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength)
  if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength)
  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
    throw new TypeError(
      'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array'
    )
  }

  if (a === b) return 0

  var x = a.length
  var y = b.length

  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
    if (a[i] !== b[i]) {
      x = a[i]
      y = b[i]
      break
    }
  }

  if (x < y) return -1
  if (y < x) return 1
  return 0
}

Buffer.isEncoding = function isEncoding (encoding) {
  switch (String(encoding).toLowerCase()) {
    case 'hex':
    case 'utf8':
    case 'utf-8':
    case 'ascii':
    case 'latin1':
    case 'binary':
    case 'base64':
    case 'ucs2':
    case 'ucs-2':
    case 'utf16le':
    case 'utf-16le':
      return true
    default:
      return false
  }
}

Buffer.concat = function concat (list, length) {
  if (!Array.isArray(list)) {
    throw new TypeError('"list" argument must be an Array of Buffers')
  }

  if (list.length === 0) {
    return Buffer.alloc(0)
  }

  var i
  if (length === undefined) {
    length = 0
    for (i = 0; i < list.length; ++i) {
      length += list[i].length
    }
  }

  var buffer = Buffer.allocUnsafe(length)
  var pos = 0
  for (i = 0; i < list.length; ++i) {
    var buf = list[i]
    if (isInstance(buf, Uint8Array)) {
      buf = Buffer.from(buf)
    }
    if (!Buffer.isBuffer(buf)) {
      throw new TypeError('"list" argument must be an Array of Buffers')
    }
    buf.copy(buffer, pos)
    pos += buf.length
  }
  return buffer
}

function byteLength (string, encoding) {
  if (Buffer.isBuffer(string)) {
    return string.length
  }
  if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
    return string.byteLength
  }
  if (typeof string !== 'string') {
    throw new TypeError(
      'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' +
      'Received type ' + typeof string
    )
  }

  var len = string.length
  var mustMatch = (arguments.length > 2 && arguments[2] === true)
  if (!mustMatch && len === 0) return 0

  // Use a for loop to avoid recursion
  var loweredCase = false
  for (;;) {
    switch (encoding) {
      case 'ascii':
      case 'latin1':
      case 'binary':
        return len
      case 'utf8':
      case 'utf-8':
        return utf8ToBytes(string).length
      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return len * 2
      case 'hex':
        return len >>> 1
      case 'base64':
        return base64ToBytes(string).length
      default:
        if (loweredCase) {
          return mustMatch ? -1 : utf8ToBytes(string).length // assume utf8
        }
        encoding = ('' + encoding).toLowerCase()
        loweredCase = true
    }
  }
}
Buffer.byteLength = byteLength

function slowToString (encoding, start, end) {
  var loweredCase = false

  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
  // property of a typed array.

  // This behaves neither like String nor Uint8Array in that we set start/end
  // to their upper/lower bounds if the value passed is out of range.
  // undefined is handled specially as per ECMA-262 6th Edition,
  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
  if (start === undefined || start < 0) {
    start = 0
  }
  // Return early if start > this.length. Done here to prevent potential uint32
  // coercion fail below.
  if (start > this.length) {
    return ''
  }

  if (end === undefined || end > this.length) {
    end = this.length
  }

  if (end <= 0) {
    return ''
  }

  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
  end >>>= 0
  start >>>= 0

  if (end <= start) {
    return ''
  }

  if (!encoding) encoding = 'utf8'

  while (true) {
    switch (encoding) {
      case 'hex':
        return hexSlice(this, start, end)

      case 'utf8':
      case 'utf-8':
        return utf8Slice(this, start, end)

      case 'ascii':
        return asciiSlice(this, start, end)

      case 'latin1':
      case 'binary':
        return latin1Slice(this, start, end)

      case 'base64':
        return base64Slice(this, start, end)

      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return utf16leSlice(this, start, end)

      default:
        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
        encoding = (encoding + '').toLowerCase()
        loweredCase = true
    }
  }
}

// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package)
// to detect a Buffer instance. It's not possible to use `instanceof Buffer`
// reliably in a browserify context because there could be multiple different
// copies of the 'buffer' package in use. This method works even for Buffer
// instances that were created from another copy of the `buffer` package.
// See: https://github.com/feross/buffer/issues/154
Buffer.prototype._isBuffer = true

function swap (b, n, m) {
  var i = b[n]
  b[n] = b[m]
  b[m] = i
}

Buffer.prototype.swap16 = function swap16 () {
  var len = this.length
  if (len % 2 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 16-bits')
  }
  for (var i = 0; i < len; i += 2) {
    swap(this, i, i + 1)
  }
  return this
}

Buffer.prototype.swap32 = function swap32 () {
  var len = this.length
  if (len % 4 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 32-bits')
  }
  for (var i = 0; i < len; i += 4) {
    swap(this, i, i + 3)
    swap(this, i + 1, i + 2)
  }
  return this
}

Buffer.prototype.swap64 = function swap64 () {
  var len = this.length
  if (len % 8 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 64-bits')
  }
  for (var i = 0; i < len; i += 8) {
    swap(this, i, i + 7)
    swap(this, i + 1, i + 6)
    swap(this, i + 2, i + 5)
    swap(this, i + 3, i + 4)
  }
  return this
}

Buffer.prototype.toString = function toString () {
  var length = this.length
  if (length === 0) return ''
  if (arguments.length === 0) return utf8Slice(this, 0, length)
  return slowToString.apply(this, arguments)
}

Buffer.prototype.toLocaleString = Buffer.prototype.toString

Buffer.prototype.equals = function equals (b) {
  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
  if (this === b) return true
  return Buffer.compare(this, b) === 0
}

Buffer.prototype.inspect = function inspect () {
  var str = ''
  var max = exports.INSPECT_MAX_BYTES
  str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim()
  if (this.length > max) str += ' ... '
  return '<Buffer ' + str + '>'
}

Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
  if (isInstance(target, Uint8Array)) {
    target = Buffer.from(target, target.offset, target.byteLength)
  }
  if (!Buffer.isBuffer(target)) {
    throw new TypeError(
      'The "target" argument must be one of type Buffer or Uint8Array. ' +
      'Received type ' + (typeof target)
    )
  }

  if (start === undefined) {
    start = 0
  }
  if (end === undefined) {
    end = target ? target.length : 0
  }
  if (thisStart === undefined) {
    thisStart = 0
  }
  if (thisEnd === undefined) {
    thisEnd = this.length
  }

  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
    throw new RangeError('out of range index')
  }

  if (thisStart >= thisEnd && start >= end) {
    return 0
  }
  if (thisStart >= thisEnd) {
    return -1
  }
  if (start >= end) {
    return 1
  }

  start >>>= 0
  end >>>= 0
  thisStart >>>= 0
  thisEnd >>>= 0

  if (this === target) return 0

  var x = thisEnd - thisStart
  var y = end - start
  var len = Math.min(x, y)

  var thisCopy = this.slice(thisStart, thisEnd)
  var targetCopy = target.slice(start, end)

  for (var i = 0; i < len; ++i) {
    if (thisCopy[i] !== targetCopy[i]) {
      x = thisCopy[i]
      y = targetCopy[i]
      break
    }
  }

  if (x < y) return -1
  if (y < x) return 1
  return 0
}

// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
//
// Arguments:
// - buffer - a Buffer to search
// - val - a string, Buffer, or number
// - byteOffset - an index into `buffer`; will be clamped to an int32
// - encoding - an optional encoding, relevant is val is a string
// - dir - true for indexOf, false for lastIndexOf
function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
  // Empty buffer means no match
  if (buffer.length === 0) return -1

  // Normalize byteOffset
  if (typeof byteOffset === 'string') {
    encoding = byteOffset
    byteOffset = 0
  } else if (byteOffset > 0x7fffffff) {
    byteOffset = 0x7fffffff
  } else if (byteOffset < -0x80000000) {
    byteOffset = -0x80000000
  }
  byteOffset = +byteOffset // Coerce to Number.
  if (numberIsNaN(byteOffset)) {
    // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
    byteOffset = dir ? 0 : (buffer.length - 1)
  }

  // Normalize byteOffset: negative offsets start from the end of the buffer
  if (byteOffset < 0) byteOffset = buffer.length + byteOffset
  if (byteOffset >= buffer.length) {
    if (dir) return -1
    else byteOffset = buffer.length - 1
  } else if (byteOffset < 0) {
    if (dir) byteOffset = 0
    else return -1
  }

  // Normalize val
  if (typeof val === 'string') {
    val = Buffer.from(val, encoding)
  }

  // Finally, search either indexOf (if dir is true) or lastIndexOf
  if (Buffer.isBuffer(val)) {
    // Special case: looking for empty string/buffer always fails
    if (val.length === 0) {
      return -1
    }
    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
  } else if (typeof val === 'number') {
    val = val & 0xFF // Search for a byte value [0-255]
    if (typeof Uint8Array.prototype.indexOf === 'function') {
      if (dir) {
        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
      } else {
        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
      }
    }
    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)
  }

  throw new TypeError('val must be string, number or Buffer')
}

function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
  var indexSize = 1
  var arrLength = arr.length
  var valLength = val.length

  if (encoding !== undefined) {
    encoding = String(encoding).toLowerCase()
    if (encoding === 'ucs2' || encoding === 'ucs-2' ||
        encoding === 'utf16le' || encoding === 'utf-16le') {
      if (arr.length < 2 || val.length < 2) {
        return -1
      }
      indexSize = 2
      arrLength /= 2
      valLength /= 2
      byteOffset /= 2
    }
  }

  function read (buf, i) {
    if (indexSize === 1) {
      return buf[i]
    } else {
      return buf.readUInt16BE(i * indexSize)
    }
  }

  var i
  if (dir) {
    var foundIndex = -1
    for (i = byteOffset; i < arrLength; i++) {
      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
        if (foundIndex === -1) foundIndex = i
        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
      } else {
        if (foundIndex !== -1) i -= i - foundIndex
        foundIndex = -1
      }
    }
  } else {
    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
    for (i = byteOffset; i >= 0; i--) {
      var found = true
      for (var j = 0; j < valLength; j++) {
        if (read(arr, i + j) !== read(val, j)) {
          found = false
          break
        }
      }
      if (found) return i
    }
  }

  return -1
}

Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
  return this.indexOf(val, byteOffset, encoding) !== -1
}

Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
}

Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
}

function hexWrite (buf, string, offset, length) {
  offset = Number(offset) || 0
  var remaining = buf.length - offset
  if (!length) {
    length = remaining
  } else {
    length = Number(length)
    if (length > remaining) {
      length = remaining
    }
  }

  var strLen = string.length

  if (length > strLen / 2) {
    length = strLen / 2
  }
  for (var i = 0; i < length; ++i) {
    var parsed = parseInt(string.substr(i * 2, 2), 16)
    if (numberIsNaN(parsed)) return i
    buf[offset + i] = parsed
  }
  return i
}

function utf8Write (buf, string, offset, length) {
  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
}

function asciiWrite (buf, string, offset, length) {
  return blitBuffer(asciiToBytes(string), buf, offset, length)
}

function latin1Write (buf, string, offset, length) {
  return asciiWrite(buf, string, offset, length)
}

function base64Write (buf, string, offset, length) {
  return blitBuffer(base64ToBytes(string), buf, offset, length)
}

function ucs2Write (buf, string, offset, length) {
  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
}

Buffer.prototype.write = function write (string, offset, length, encoding) {
  // Buffer#write(string)
  if (offset === undefined) {
    encoding = 'utf8'
    length = this.length
    offset = 0
  // Buffer#write(string, encoding)
  } else if (length === undefined && typeof offset === 'string') {
    encoding = offset
    length = this.length
    offset = 0
  // Buffer#write(string, offset[, length][, encoding])
  } else if (isFinite(offset)) {
    offset = offset >>> 0
    if (isFinite(length)) {
      length = length >>> 0
      if (encoding === undefined) encoding = 'utf8'
    } else {
      encoding = length
      length = undefined
    }
  } else {
    throw new Error(
      'Buffer.write(string, encoding, offset[, length]) is no longer supported'
    )
  }

  var remaining = this.length - offset
  if (length === undefined || length > remaining) length = remaining

  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
    throw new RangeError('Attempt to write outside buffer bounds')
  }

  if (!encoding) encoding = 'utf8'

  var loweredCase = false
  for (;;) {
    switch (encoding) {
      case 'hex':
        return hexWrite(this, string, offset, length)

      case 'utf8':
      case 'utf-8':
        return utf8Write(this, string, offset, length)

      case 'ascii':
        return asciiWrite(this, string, offset, length)

      case 'latin1':
      case 'binary':
        return latin1Write(this, string, offset, length)

      case 'base64':
        // Warning: maxLength not taken into account in base64Write
        return base64Write(this, string, offset, length)

      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return ucs2Write(this, string, offset, length)

      default:
        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
        encoding = ('' + encoding).toLowerCase()
        loweredCase = true
    }
  }
}

Buffer.prototype.toJSON = function toJSON () {
  return {
    type: 'Buffer',
    data: Array.prototype.slice.call(this._arr || this, 0)
  }
}

function base64Slice (buf, start, end) {
  if (start === 0 && end === buf.length) {
    return base64.fromByteArray(buf)
  } else {
    return base64.fromByteArray(buf.slice(start, end))
  }
}

function utf8Slice (buf, start, end) {
  end = Math.min(buf.length, end)
  var res = []

  var i = start
  while (i < end) {
    var firstByte = buf[i]
    var codePoint = null
    var bytesPerSequence = (firstByte > 0xEF) ? 4
      : (firstByte > 0xDF) ? 3
        : (firstByte > 0xBF) ? 2
          : 1

    if (i + bytesPerSequence <= end) {
      var secondByte, thirdByte, fourthByte, tempCodePoint

      switch (bytesPerSequence) {
        case 1:
          if (firstByte < 0x80) {
            codePoint = firstByte
          }
          break
        case 2:
          secondByte = buf[i + 1]
          if ((secondByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
            if (tempCodePoint > 0x7F) {
              codePoint = tempCodePoint
            }
          }
          break
        case 3:
          secondByte = buf[i + 1]
          thirdByte = buf[i + 2]
          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
              codePoint = tempCodePoint
            }
          }
          break
        case 4:
          secondByte = buf[i + 1]
          thirdByte = buf[i + 2]
          fourthByte = buf[i + 3]
          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
              codePoint = tempCodePoint
            }
          }
      }
    }

    if (codePoint === null) {
      // we did not generate a valid codePoint so insert a
      // replacement char (U+FFFD) and advance only 1 byte
      codePoint = 0xFFFD
      bytesPerSequence = 1
    } else if (codePoint > 0xFFFF) {
      // encode to utf16 (surrogate pair dance)
      codePoint -= 0x10000
      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
      codePoint = 0xDC00 | codePoint & 0x3FF
    }

    res.push(codePoint)
    i += bytesPerSequence
  }

  return decodeCodePointsArray(res)
}

// Based on http://stackoverflow.com/a/22747272/680742, the browser with
// the lowest limit is Chrome, with 0x10000 args.
// We go 1 magnitude less, for safety
var MAX_ARGUMENTS_LENGTH = 0x1000

function decodeCodePointsArray (codePoints) {
  var len = codePoints.length
  if (len <= MAX_ARGUMENTS_LENGTH) {
    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
  }

  // Decode in chunks to avoid "call stack size exceeded".
  var res = ''
  var i = 0
  while (i < len) {
    res += String.fromCharCode.apply(
      String,
      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
    )
  }
  return res
}

function asciiSlice (buf, start, end) {
  var ret = ''
  end = Math.min(buf.length, end)

  for (var i = start; i < end; ++i) {
    ret += String.fromCharCode(buf[i] & 0x7F)
  }
  return ret
}

function latin1Slice (buf, start, end) {
  var ret = ''
  end = Math.min(buf.length, end)

  for (var i = start; i < end; ++i) {
    ret += String.fromCharCode(buf[i])
  }
  return ret
}

function hexSlice (buf, start, end) {
  var len = buf.length

  if (!start || start < 0) start = 0
  if (!end || end < 0 || end > len) end = len

  var out = ''
  for (var i = start; i < end; ++i) {
    out += toHex(buf[i])
  }
  return out
}

function utf16leSlice (buf, start, end) {
  var bytes = buf.slice(start, end)
  var res = ''
  for (var i = 0; i < bytes.length; i += 2) {
    res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256))
  }
  return res
}

Buffer.prototype.slice = function slice (start, end) {
  var len = this.length
  start = ~~start
  end = end === undefined ? len : ~~end

  if (start < 0) {
    start += len
    if (start < 0) start = 0
  } else if (start > len) {
    start = len
  }

  if (end < 0) {
    end += len
    if (end < 0) end = 0
  } else if (end > len) {
    end = len
  }

  if (end < start) end = start

  var newBuf = this.subarray(start, end)
  // Return an augmented `Uint8Array` instance
  newBuf.__proto__ = Buffer.prototype
  return newBuf
}

/*
 * Need to make sure that buffer isn't trying to write out of bounds.
 */
function checkOffset (offset, ext, length) {
  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
}

Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
  offset = offset >>> 0
  byteLength = byteLength >>> 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var val = this[offset]
  var mul = 1
  var i = 0
  while (++i < byteLength && (mul *= 0x100)) {
    val += this[offset + i] * mul
  }

  return val
}

Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
  offset = offset >>> 0
  byteLength = byteLength >>> 0
  if (!noAssert) {
    checkOffset(offset, byteLength, this.length)
  }

  var val = this[offset + --byteLength]
  var mul = 1
  while (byteLength > 0 && (mul *= 0x100)) {
    val += this[offset + --byteLength] * mul
  }

  return val
}

Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 1, this.length)
  return this[offset]
}

Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 2, this.length)
  return this[offset] | (this[offset + 1] << 8)
}

Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 2, this.length)
  return (this[offset] << 8) | this[offset + 1]
}

Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 4, this.length)

  return ((this[offset]) |
      (this[offset + 1] << 8) |
      (this[offset + 2] << 16)) +
      (this[offset + 3] * 0x1000000)
}

Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset] * 0x1000000) +
    ((this[offset + 1] << 16) |
    (this[offset + 2] << 8) |
    this[offset + 3])
}

Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
  offset = offset >>> 0
  byteLength = byteLength >>> 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var val = this[offset]
  var mul = 1
  var i = 0
  while (++i < byteLength && (mul *= 0x100)) {
    val += this[offset + i] * mul
  }
  mul *= 0x80

  if (val >= mul) val -= Math.pow(2, 8 * byteLength)

  return val
}

Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
  offset = offset >>> 0
  byteLength = byteLength >>> 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var i = byteLength
  var mul = 1
  var val = this[offset + --i]
  while (i > 0 && (mul *= 0x100)) {
    val += this[offset + --i] * mul
  }
  mul *= 0x80

  if (val >= mul) val -= Math.pow(2, 8 * byteLength)

  return val
}

Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 1, this.length)
  if (!(this[offset] & 0x80)) return (this[offset])
  return ((0xff - this[offset] + 1) * -1)
}

Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 2, this.length)
  var val = this[offset] | (this[offset + 1] << 8)
  return (val & 0x8000) ? val | 0xFFFF0000 : val
}

Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 2, this.length)
  var val = this[offset + 1] | (this[offset] << 8)
  return (val & 0x8000) ? val | 0xFFFF0000 : val
}

Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset]) |
    (this[offset + 1] << 8) |
    (this[offset + 2] << 16) |
    (this[offset + 3] << 24)
}

Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset] << 24) |
    (this[offset + 1] << 16) |
    (this[offset + 2] << 8) |
    (this[offset + 3])
}

Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 4, this.length)
  return ieee754.read(this, offset, true, 23, 4)
}

Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 4, this.length)
  return ieee754.read(this, offset, false, 23, 4)
}

Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 8, this.length)
  return ieee754.read(this, offset, true, 52, 8)
}

Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 8, this.length)
  return ieee754.read(this, offset, false, 52, 8)
}

function checkInt (buf, value, offset, ext, max, min) {
  if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
  if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
  if (offset + ext > buf.length) throw new RangeError('Index out of range')
}

Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset >>> 0
  byteLength = byteLength >>> 0
  if (!noAssert) {
    var maxBytes = Math.pow(2, 8 * byteLength) - 1
    checkInt(this, value, offset, byteLength, maxBytes, 0)
  }

  var mul = 1
  var i = 0
  this[offset] = value & 0xFF
  while (++i < byteLength && (mul *= 0x100)) {
    this[offset + i] = (value / mul) & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset >>> 0
  byteLength = byteLength >>> 0
  if (!noAssert) {
    var maxBytes = Math.pow(2, 8 * byteLength) - 1
    checkInt(this, value, offset, byteLength, maxBytes, 0)
  }

  var i = byteLength - 1
  var mul = 1
  this[offset + i] = value & 0xFF
  while (--i >= 0 && (mul *= 0x100)) {
    this[offset + i] = (value / mul) & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
  this[offset] = (value & 0xff)
  return offset + 1
}

Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
  this[offset] = (value & 0xff)
  this[offset + 1] = (value >>> 8)
  return offset + 2
}

Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
  this[offset] = (value >>> 8)
  this[offset + 1] = (value & 0xff)
  return offset + 2
}

Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
  this[offset + 3] = (value >>> 24)
  this[offset + 2] = (value >>> 16)
  this[offset + 1] = (value >>> 8)
  this[offset] = (value & 0xff)
  return offset + 4
}

Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
  this[offset] = (value >>> 24)
  this[offset + 1] = (value >>> 16)
  this[offset + 2] = (value >>> 8)
  this[offset + 3] = (value & 0xff)
  return offset + 4
}

Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) {
    var limit = Math.pow(2, (8 * byteLength) - 1)

    checkInt(this, value, offset, byteLength, limit - 1, -limit)
  }

  var i = 0
  var mul = 1
  var sub = 0
  this[offset] = value & 0xFF
  while (++i < byteLength && (mul *= 0x100)) {
    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
      sub = 1
    }
    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) {
    var limit = Math.pow(2, (8 * byteLength) - 1)

    checkInt(this, value, offset, byteLength, limit - 1, -limit)
  }

  var i = byteLength - 1
  var mul = 1
  var sub = 0
  this[offset + i] = value & 0xFF
  while (--i >= 0 && (mul *= 0x100)) {
    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
      sub = 1
    }
    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
  if (value < 0) value = 0xff + value + 1
  this[offset] = (value & 0xff)
  return offset + 1
}

Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
  this[offset] = (value & 0xff)
  this[offset + 1] = (value >>> 8)
  return offset + 2
}

Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
  this[offset] = (value >>> 8)
  this[offset + 1] = (value & 0xff)
  return offset + 2
}

Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
  this[offset] = (value & 0xff)
  this[offset + 1] = (value >>> 8)
  this[offset + 2] = (value >>> 16)
  this[offset + 3] = (value >>> 24)
  return offset + 4
}

Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
  if (value < 0) value = 0xffffffff + value + 1
  this[offset] = (value >>> 24)
  this[offset + 1] = (value >>> 16)
  this[offset + 2] = (value >>> 8)
  this[offset + 3] = (value & 0xff)
  return offset + 4
}

function checkIEEE754 (buf, value, offset, ext, max, min) {
  if (offset + ext > buf.length) throw new RangeError('Index out of range')
  if (offset < 0) throw new RangeError('Index out of range')
}

function writeFloat (buf, value, offset, littleEndian, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) {
    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
  }
  ieee754.write(buf, value, offset, littleEndian, 23, 4)
  return offset + 4
}

Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
  return writeFloat(this, value, offset, true, noAssert)
}

Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
  return writeFloat(this, value, offset, false, noAssert)
}

function writeDouble (buf, value, offset, littleEndian, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) {
    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
  }
  ieee754.write(buf, value, offset, littleEndian, 52, 8)
  return offset + 8
}

Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
  return writeDouble(this, value, offset, true, noAssert)
}

Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
  return writeDouble(this, value, offset, false, noAssert)
}

// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
Buffer.prototype.copy = function copy (target, targetStart, start, end) {
  if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer')
  if (!start) start = 0
  if (!end && end !== 0) end = this.length
  if (targetStart >= target.length) targetStart = target.length
  if (!targetStart) targetStart = 0
  if (end > 0 && end < start) end = start

  // Copy 0 bytes; we're done
  if (end === start) return 0
  if (target.length === 0 || this.length === 0) return 0

  // Fatal error conditions
  if (targetStart < 0) {
    throw new RangeError('targetStart out of bounds')
  }
  if (start < 0 || start >= this.length) throw new RangeError('Index out of range')
  if (end < 0) throw new RangeError('sourceEnd out of bounds')

  // Are we oob?
  if (end > this.length) end = this.length
  if (target.length - targetStart < end - start) {
    end = target.length - targetStart + start
  }

  var len = end - start

  if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') {
    // Use built-in when available, missing from IE11
    this.copyWithin(targetStart, start, end)
  } else if (this === target && start < targetStart && targetStart < end) {
    // descending copy from end
    for (var i = len - 1; i >= 0; --i) {
      target[i + targetStart] = this[i + start]
    }
  } else {
    Uint8Array.prototype.set.call(
      target,
      this.subarray(start, end),
      targetStart
    )
  }

  return len
}

// Usage:
//    buffer.fill(number[, offset[, end]])
//    buffer.fill(buffer[, offset[, end]])
//    buffer.fill(string[, offset[, end]][, encoding])
Buffer.prototype.fill = function fill (val, start, end, encoding) {
  // Handle string cases:
  if (typeof val === 'string') {
    if (typeof start === 'string') {
      encoding = start
      start = 0
      end = this.length
    } else if (typeof end === 'string') {
      encoding = end
      end = this.length
    }
    if (encoding !== undefined && typeof encoding !== 'string') {
      throw new TypeError('encoding must be a string')
    }
    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
      throw new TypeError('Unknown encoding: ' + encoding)
    }
    if (val.length === 1) {
      var code = val.charCodeAt(0)
      if ((encoding === 'utf8' && code < 128) ||
          encoding === 'latin1') {
        // Fast path: If `val` fits into a single byte, use that numeric value.
        val = code
      }
    }
  } else if (typeof val === 'number') {
    val = val & 255
  }

  // Invalid ranges are not set to a default, so can range check early.
  if (start < 0 || this.length < start || this.length < end) {
    throw new RangeError('Out of range index')
  }

  if (end <= start) {
    return this
  }

  start = start >>> 0
  end = end === undefined ? this.length : end >>> 0

  if (!val) val = 0

  var i
  if (typeof val === 'number') {
    for (i = start; i < end; ++i) {
      this[i] = val
    }
  } else {
    var bytes = Buffer.isBuffer(val)
      ? val
      : Buffer.from(val, encoding)
    var len = bytes.length
    if (len === 0) {
      throw new TypeError('The value "' + val +
        '" is invalid for argument "value"')
    }
    for (i = 0; i < end - start; ++i) {
      this[i + start] = bytes[i % len]
    }
  }

  return this
}

// HELPER FUNCTIONS
// ================

var INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g

function base64clean (str) {
  // Node takes equal signs as end of the Base64 encoding
  str = str.split('=')[0]
  // Node strips out invalid characters like \n and \t from the string, base64-js does not
  str = str.trim().replace(INVALID_BASE64_RE, '')
  // Node converts strings with length < 2 to ''
  if (str.length < 2) return ''
  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
  while (str.length % 4 !== 0) {
    str = str + '='
  }
  return str
}

function toHex (n) {
  if (n < 16) return '0' + n.toString(16)
  return n.toString(16)
}

function utf8ToBytes (string, units) {
  units = units || Infinity
  var codePoint
  var length = string.length
  var leadSurrogate = null
  var bytes = []

  for (var i = 0; i < length; ++i) {
    codePoint = string.charCodeAt(i)

    // is surrogate component
    if (codePoint > 0xD7FF && codePoint < 0xE000) {
      // last char was a lead
      if (!leadSurrogate) {
        // no lead yet
        if (codePoint > 0xDBFF) {
          // unexpected trail
          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
          continue
        } else if (i + 1 === length) {
          // unpaired lead
          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
          continue
        }

        // valid lead
        leadSurrogate = codePoint

        continue
      }

      // 2 leads in a row
      if (codePoint < 0xDC00) {
        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
        leadSurrogate = codePoint
        continue
      }

      // valid surrogate pair
      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
    } else if (leadSurrogate) {
      // valid bmp char, but last char was a lead
      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
    }

    leadSurrogate = null

    // encode utf8
    if (codePoint < 0x80) {
      if ((units -= 1) < 0) break
      bytes.push(codePoint)
    } else if (codePoint < 0x800) {
      if ((units -= 2) < 0) break
      bytes.push(
        codePoint >> 0x6 | 0xC0,
        codePoint & 0x3F | 0x80
      )
    } else if (codePoint < 0x10000) {
      if ((units -= 3) < 0) break
      bytes.push(
        codePoint >> 0xC | 0xE0,
        codePoint >> 0x6 & 0x3F | 0x80,
        codePoint & 0x3F | 0x80
      )
    } else if (codePoint < 0x110000) {
      if ((units -= 4) < 0) break
      bytes.push(
        codePoint >> 0x12 | 0xF0,
        codePoint >> 0xC & 0x3F | 0x80,
        codePoint >> 0x6 & 0x3F | 0x80,
        codePoint & 0x3F | 0x80
      )
    } else {
      throw new Error('Invalid code point')
    }
  }

  return bytes
}

function asciiToBytes (str) {
  var byteArray = []
  for (var i = 0; i < str.length; ++i) {
    // Node's code seems to be doing this and not & 0x7F..
    byteArray.push(str.charCodeAt(i) & 0xFF)
  }
  return byteArray
}

function utf16leToBytes (str, units) {
  var c, hi, lo
  var byteArray = []
  for (var i = 0; i < str.length; ++i) {
    if ((units -= 2) < 0) break

    c = str.charCodeAt(i)
    hi = c >> 8
    lo = c % 256
    byteArray.push(lo)
    byteArray.push(hi)
  }

  return byteArray
}

function base64ToBytes (str) {
  return base64.toByteArray(base64clean(str))
}

function blitBuffer (src, dst, offset, length) {
  for (var i = 0; i < length; ++i) {
    if ((i + offset >= dst.length) || (i >= src.length)) break
    dst[i + offset] = src[i]
  }
  return i
}

// ArrayBuffer or Uint8Array objects from other contexts (i.e. iframes) do not pass
// the `instanceof` check but they should be treated as of that type.
// See: https://github.com/feross/buffer/issues/166
function isInstance (obj, type) {
  return obj instanceof type ||
    (obj != null && obj.constructor != null && obj.constructor.name != null &&
      obj.constructor.name === type.name)
}
function numberIsNaN (obj) {
  // For IE11 support
  return obj !== obj // eslint-disable-line no-self-compare
}

}).call(this)}).call(this,require("buffer").Buffer)
},{"base64-js":3,"buffer":4,"ieee754":7}],5:[function(require,module,exports){
var charenc = {
  // UTF-8 encoding
  utf8: {
    // Convert a string to a byte array
    stringToBytes: function(str) {
      return charenc.bin.stringToBytes(unescape(encodeURIComponent(str)));
    },

    // Convert a byte array to a string
    bytesToString: function(bytes) {
      return decodeURIComponent(escape(charenc.bin.bytesToString(bytes)));
    }
  },

  // Binary encoding
  bin: {
    // Convert a string to a byte array
    stringToBytes: function(str) {
      for (var bytes = [], i = 0; i < str.length; i++)
        bytes.push(str.charCodeAt(i) & 0xFF);
      return bytes;
    },

    // Convert a byte array to a string
    bytesToString: function(bytes) {
      for (var str = [], i = 0; i < bytes.length; i++)
        str.push(String.fromCharCode(bytes[i]));
      return str.join('');
    }
  }
};

module.exports = charenc;

},{}],6:[function(require,module,exports){
(function() {
  var base64map
      = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',

  crypt = {
    // Bit-wise rotation left
    rotl: function(n, b) {
      return (n << b) | (n >>> (32 - b));
    },

    // Bit-wise rotation right
    rotr: function(n, b) {
      return (n << (32 - b)) | (n >>> b);
    },

    // Swap big-endian to little-endian and vice versa
    endian: function(n) {
      // If number given, swap endian
      if (n.constructor == Number) {
        return crypt.rotl(n, 8) & 0x00FF00FF | crypt.rotl(n, 24) & 0xFF00FF00;
      }

      // Else, assume array and swap all items
      for (var i = 0; i < n.length; i++)
        n[i] = crypt.endian(n[i]);
      return n;
    },

    // Generate an array of any length of random bytes
    randomBytes: function(n) {
      for (var bytes = []; n > 0; n--)
        bytes.push(Math.floor(Math.random() * 256));
      return bytes;
    },

    // Convert a byte array to big-endian 32-bit words
    bytesToWords: function(bytes) {
      for (var words = [], i = 0, b = 0; i < bytes.length; i++, b += 8)
        words[b >>> 5] |= bytes[i] << (24 - b % 32);
      return words;
    },

    // Convert big-endian 32-bit words to a byte array
    wordsToBytes: function(words) {
      for (var bytes = [], b = 0; b < words.length * 32; b += 8)
        bytes.push((words[b >>> 5] >>> (24 - b % 32)) & 0xFF);
      return bytes;
    },

    // Convert a byte array to a hex string
    bytesToHex: function(bytes) {
      for (var hex = [], i = 0; i < bytes.length; i++) {
        hex.push((bytes[i] >>> 4).toString(16));
        hex.push((bytes[i] & 0xF).toString(16));
      }
      return hex.join('');
    },

    // Convert a hex string to a byte array
    hexToBytes: function(hex) {
      for (var bytes = [], c = 0; c < hex.length; c += 2)
        bytes.push(parseInt(hex.substr(c, 2), 16));
      return bytes;
    },

    // Convert a byte array to a base-64 string
    bytesToBase64: function(bytes) {
      for (var base64 = [], i = 0; i < bytes.length; i += 3) {
        var triplet = (bytes[i] << 16) | (bytes[i + 1] << 8) | bytes[i + 2];
        for (var j = 0; j < 4; j++)
          if (i * 8 + j * 6 <= bytes.length * 8)
            base64.push(base64map.charAt((triplet >>> 6 * (3 - j)) & 0x3F));
          else
            base64.push('=');
      }
      return base64.join('');
    },

    // Convert a base-64 string to a byte array
    base64ToBytes: function(base64) {
      // Remove non-base-64 characters
      base64 = base64.replace(/[^A-Z0-9+\/]/ig, '');

      for (var bytes = [], i = 0, imod4 = 0; i < base64.length;
          imod4 = ++i % 4) {
        if (imod4 == 0) continue;
        bytes.push(((base64map.indexOf(base64.charAt(i - 1))
            & (Math.pow(2, -2 * imod4 + 8) - 1)) << (imod4 * 2))
            | (base64map.indexOf(base64.charAt(i)) >>> (6 - imod4 * 2)));
      }
      return bytes;
    }
  };

  module.exports = crypt;
})();

},{}],7:[function(require,module,exports){
/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
exports.read = function (buffer, offset, isLE, mLen, nBytes) {
  var e, m
  var eLen = (nBytes * 8) - mLen - 1
  var eMax = (1 << eLen) - 1
  var eBias = eMax >> 1
  var nBits = -7
  var i = isLE ? (nBytes - 1) : 0
  var d = isLE ? -1 : 1
  var s = buffer[offset + i]

  i += d

  e = s & ((1 << (-nBits)) - 1)
  s >>= (-nBits)
  nBits += eLen
  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}

  m = e & ((1 << (-nBits)) - 1)
  e >>= (-nBits)
  nBits += mLen
  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}

  if (e === 0) {
    e = 1 - eBias
  } else if (e === eMax) {
    return m ? NaN : ((s ? -1 : 1) * Infinity)
  } else {
    m = m + Math.pow(2, mLen)
    e = e - eBias
  }
  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
}

exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
  var e, m, c
  var eLen = (nBytes * 8) - mLen - 1
  var eMax = (1 << eLen) - 1
  var eBias = eMax >> 1
  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
  var i = isLE ? 0 : (nBytes - 1)
  var d = isLE ? 1 : -1
  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0

  value = Math.abs(value)

  if (isNaN(value) || value === Infinity) {
    m = isNaN(value) ? 1 : 0
    e = eMax
  } else {
    e = Math.floor(Math.log(value) / Math.LN2)
    if (value * (c = Math.pow(2, -e)) < 1) {
      e--
      c *= 2
    }
    if (e + eBias >= 1) {
      value += rt / c
    } else {
      value += rt * Math.pow(2, 1 - eBias)
    }
    if (value * c >= 2) {
      e++
      c /= 2
    }

    if (e + eBias >= eMax) {
      m = 0
      e = eMax
    } else if (e + eBias >= 1) {
      m = ((value * c) - 1) * Math.pow(2, mLen)
      e = e + eBias
    } else {
      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
      e = 0
    }
  }

  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}

  e = (e << mLen) | m
  eLen += mLen
  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}

  buffer[offset + i - d] |= s * 128
}

},{}],8:[function(require,module,exports){
/*
 * Copyright (C) 2015 Michael Martinez
 * Changes: Added support for selection values 2-7, fixed minor bugs &
 * warnings, split into multiple class files, and general clean up.
 *
 * 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
 */

/*
 * Copyright (C) Helmut Dersch
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*jslint browser: true, node: true */
/*global require, module */

"use strict";

/*** Imports ***/
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};


/*** Constructor ***/
jpeg.lossless.ComponentSpec = jpeg.lossless.ComponentSpec || function () {
    this.hSamp = 0; // Horizontal sampling factor
    this.quantTableSel = 0; // Quantization table destination selector
    this.vSamp = 0; // Vertical
};


/*** Exports ***/

var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
    module.exports = jpeg.lossless.ComponentSpec;
}

},{}],9:[function(require,module,exports){
/*
 * Copyright (C) 2015 Michael Martinez
 * Changes: Added support for selection values 2-7, fixed minor bugs &
 * warnings, split into multiple class files, and general clean up.
 *
 * 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
 */

/*
 * Copyright (C) Helmut Dersch
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*jslint browser: true, node: true */
/*global require, module */

"use strict";

/*** Imports ***/
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};


/*** Constructor ***/
jpeg.lossless.DataStream = jpeg.lossless.DataStream || function (data, offset, length) {
    if (offset === undefined && length === undefined) { // Old api
        this.buffer = new Uint8Array(data);
    } else {
        this.buffer = new Uint8Array(data, offset, length);
    }
    this.index = 0;
};



jpeg.lossless.DataStream.prototype.get16 = function () {
    // var value = this.buffer.getUint16(this.index, false);
    var value = (this.buffer[this.index] << 8) + this.buffer[this.index + 1]; // DataView is big-endian by default
    this.index += 2;
    return value;
};



jpeg.lossless.DataStream.prototype.get8 = function () {
    // var value = this.buffer.getUint8(this.index);
    var value = this.buffer[this.index];
    this.index += 1;
    return value;
};


/*** Exports ***/

var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
    module.exports = jpeg.lossless.DataStream;
}

},{}],10:[function(require,module,exports){
/*
 * Copyright (C) 2015 Michael Martinez
 * Changes: Added support for selection values 2-7, fixed minor bugs &
 * warnings, split into multiple class files, and general clean up.
 *
 * 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
 */

/*
 * Copyright (C) Helmut Dersch
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*jslint browser: true, node: true */
/*global require, module */

"use strict";

/*** Imports ***/
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
jpeg.lossless.DataStream = jpeg.lossless.DataStream || ((typeof require !== 'undefined') ? require('./data-stream.js') : null);
jpeg.lossless.HuffmanTable = jpeg.lossless.HuffmanTable || ((typeof require !== 'undefined') ? require('./huffman-table.js') : null);
jpeg.lossless.QuantizationTable = jpeg.lossless.QuantizationTable || ((typeof require !== 'undefined') ? require('./quantization-table.js') : null);
jpeg.lossless.ScanHeader = jpeg.lossless.ScanHeader || ((typeof require !== 'undefined') ? require('./scan-header.js') : null);
jpeg.lossless.FrameHeader = jpeg.lossless.FrameHeader || ((typeof require !== 'undefined') ? require('./frame-header.js') : null);
jpeg.lossless.Utils = jpeg.lossless.Utils || ((typeof require !== 'undefined') ? require('./utils.js') : null);


/*** Constructor ***/

/**
 * The Decoder constructor.
 * @property {number} xDim - size of x dimension
 * @property {number} yDim - size of y dimension
 * @property {number} numComp - number of components
 * @property {number} numBytes - number of bytes per component
 * @type {Function}
 */
jpeg.lossless.Decoder = jpeg.lossless.Decoder || function (buffer, numBytes) {
    this.buffer = buffer;
    this.frame = new jpeg.lossless.FrameHeader();
    this.huffTable = new jpeg.lossless.HuffmanTable();
    this.quantTable = new jpeg.lossless.QuantizationTable();
    this.scan = new jpeg.lossless.ScanHeader();
    this.DU = jpeg.lossless.Utils.createArray(10, 4, 64); // at most 10 data units in a MCU, at most 4 data units in one component
    this.HuffTab = jpeg.lossless.Utils.createArray(4, 2, 50 * 256);
    this.IDCT_Source = [];
    this.nBlock = []; // number of blocks in the i-th Comp in a scan
    this.acTab = jpeg.lossless.Utils.createArray(10, 1); // ac HuffTab for the i-th Comp in a scan
    this.dcTab = jpeg.lossless.Utils.createArray(10, 1); // dc HuffTab for the i-th Comp in a scan
    this.qTab = jpeg.lossless.Utils.createArray(10, 1); // quantization table for the i-th Comp in a scan
    this.marker = 0;
    this.markerIndex = 0;
    this.numComp = 0;
    this.restartInterval = 0;
    this.selection = 0;
    this.xDim = 0;
    this.yDim = 0;
    this.xLoc = 0;
    this.yLoc = 0;
    this.numBytes = 0;
    this.outputData = null;
    this.restarting = false;
    this.mask = 0;

    if (typeof numBytes !== "undefined") {
        this.numBytes = numBytes;
    }
};


/*** Static Pseudo-constants ***/

jpeg.lossless.Decoder.IDCT_P = [0, 5, 40, 16, 45, 2, 7, 42, 21, 56, 8, 61, 18, 47, 1, 4, 41, 23, 58, 13, 32, 24, 37, 10, 63, 17, 44, 3, 6, 43, 20,
    57, 15, 34, 29, 48, 53, 26, 39, 9, 60, 19, 46, 22, 59, 12, 33, 31, 50, 55, 25, 36, 11, 62, 14, 35, 28, 49, 52, 27, 38, 30, 51, 54];
jpeg.lossless.Decoder.TABLE = [0, 1, 5, 6, 14, 15, 27, 28, 2, 4, 7, 13, 16, 26, 29, 42, 3, 8, 12, 17, 25, 30, 41, 43, 9, 11, 18, 24, 31, 40, 44, 53,
    10, 19, 23, 32, 39, 45, 52, 54, 20, 22, 33, 38, 46, 51, 55, 60, 21, 34, 37, 47, 50, 56, 59, 61, 35, 36, 48, 49, 57, 58, 62, 63];
jpeg.lossless.Decoder.MAX_HUFFMAN_SUBTREE = 50;
jpeg.lossless.Decoder.MSB = 0x80000000;
jpeg.lossless.Decoder.RESTART_MARKER_BEGIN = 0xFFD0;
jpeg.lossless.Decoder.RESTART_MARKER_END = 0xFFD7;

/*** Prototype Methods ***/

/**
 * Returns decompressed data.
 * @param {ArrayBuffer} buffer
 * @param {number} [offset]
 * @param {number} [length]
 * @returns {ArrayBufer}
 */
jpeg.lossless.Decoder.prototype.decompress = function (buffer, offset, length) {
    return this.decode(buffer, offset, length).buffer;
};



jpeg.lossless.Decoder.prototype.decode = function (buffer, offset, length, numBytes) {
    /*jslint bitwise: true */

    var current, scanNum = 0, pred = [], i, compN, temp = [], index = [], mcuNum;

    if (typeof buffer !== "undefined") {
        this.buffer = buffer;
    }

    if (typeof numBytes !== "undefined") {
        this.numBytes = numBytes;
    }

    this.stream = new jpeg.lossless.DataStream(this.buffer, offset, length);
    this.buffer = null;

    this.xLoc = 0;
    this.yLoc = 0;
    current = this.stream.get16();

    if (current !== 0xFFD8) { // SOI
        throw new Error("Not a JPEG file");
    }

    current = this.stream.get16();

    while ((((current >> 4) !== 0x0FFC) || (current === 0xFFC4))) { // SOF 0~15
        switch (current) {
            case 0xFFC4: // DHT
                this.huffTable.read(this.stream, this.HuffTab);
                break;
            case 0xFFCC: // DAC
                throw new Error("Program doesn't support arithmetic coding. (format throw new IOException)");
            case 0xFFDB:
                this.quantTable.read(this.stream, jpeg.lossless.Decoder.TABLE);
                break;
            case 0xFFDD:
                this.restartInterval = this.readNumber();
                break;
            case 0xFFE0:
            case 0xFFE1:
            case 0xFFE2:
            case 0xFFE3:
            case 0xFFE4:
            case 0xFFE5:
            case 0xFFE6:
            case 0xFFE7:
            case 0xFFE8:
            case 0xFFE9:
            case 0xFFEA:
            case 0xFFEB:
            case 0xFFEC:
            case 0xFFED:
            case 0xFFEE:
            case 0xFFEF:
                this.readApp();
                break;
            case 0xFFFE:
                this.readComment();
                break;
            default:
                if ((current >> 8) !== 0xFF) {
                    throw new Error("ERROR: format throw new IOException! (decode)");
                }
        }

        current = this.stream.get16();
    }

    if ((current < 0xFFC0) || (current > 0xFFC7)) {
        throw new Error("ERROR: could not handle arithmetic code!");
    }

    this.frame.read(this.stream);
    current = this.stream.get16();

    do {
        while (current !== 0x0FFDA) { // SOS
            switch (current) {
                case 0xFFC4: // DHT
                    this.huffTable.read(this.stream, this.HuffTab);
                    break;
                case 0xFFCC: // DAC
                    throw new Error("Program doesn't support arithmetic coding. (format throw new IOException)");
                case 0xFFDB:
                    this.quantTable.read(this.stream, jpeg.lossless.Decoder.TABLE);
                    break;
                case 0xFFDD:
                    this.restartInterval = this.readNumber();
                    break;
                case 0xFFE0:
                case 0xFFE1:
                case 0xFFE2:
                case 0xFFE3:
                case 0xFFE4:
                case 0xFFE5:
                case 0xFFE6:
                case 0xFFE7:
                case 0xFFE8:
                case 0xFFE9:
                case 0xFFEA:
                case 0xFFEB:
                case 0xFFEC:
                case 0xFFED:
                case 0xFFEE:
                case 0xFFEF:
                    this.readApp();
                    break;
                case 0xFFFE:
                    this.readComment();
                    break;
                default:
                    if ((current >> 8) !== 0xFF) {
                        throw new Error("ERROR: format throw new IOException! (Parser.decode)");
                    }
            }

            current = this.stream.get16();
        }

        this.precision = this.frame.precision;
        this.components = this.frame.components;

        if (!this.numBytes) {
            this.numBytes = parseInt(Math.ceil(this.precision / 8));
        }

        if (this.numBytes == 1) {
            this.mask = 0xFF;
        } else {
            this.mask = 0xFFFF;
        }

        this.scan.read(this.stream);
        this.numComp = this.scan.numComp;
        this.selection = this.scan.selection;

        if (this.numBytes === 1) {
            if (this.numComp === 3) {
                this.getter = this.getValueRGB;
                this.setter = this.setValueRGB;
                this.output = this.outputRGB;
            } else {
                this.getter = this.getValue8;
                this.setter = this.setValue8;
                this.output = this.outputSingle;
            }
        } else {
            this.getter = this.getValue16;
            this.setter = this.setValue16;
            this.output = this.outputSingle;
        }

        switch (this.selection) {
            case 2:
                this.selector = this.select2;
                break;
            case 3:
                this.selector = this.select3;
                break;
            case 4:
                this.selector = this.select4;
                break;
            case 5:
                this.selector = this.select5;
                break;
            case 6:
                this.selector = this.select6;
                break;
            case 7:
                this.selector = this.select7;
                break;
            default:
                this.selector = this.select1;
                break;
        }

        this.scanComps = this.scan.components;
        this.quantTables = this.quantTable.quantTables;

        for (i = 0; i < this.numComp; i+=1) {
            compN = this.scanComps[i].scanCompSel;
            this.qTab[i] = this.quantTables[this.components[compN].quantTableSel];
            this.nBlock[i] = this.components[compN].vSamp * this.components[compN].hSamp;
            this.dcTab[i] = this.HuffTab[this.scanComps[i].dcTabSel][0];
            this.acTab[i] = this.HuffTab[this.scanComps[i].acTabSel][1];
        }

        this.xDim = this.frame.dimX;
        this.yDim = this.frame.dimY;
        if (this.numBytes == 1) {
            this.outputData = new Uint8Array(new ArrayBuffer(this.xDim * this.yDim * this.numBytes * this.numComp));
        } else {
            this.outputData = new Uint16Array(new ArrayBuffer(this.xDim * this.yDim * this.numBytes * this.numComp));
        }

        scanNum+=1;

        while (true) { // Decode one scan
            temp[0] = 0;
            index[0] = 0;

            for (i = 0; i < 10; i+=1) {
                pred[i] = (1 << (this.precision - 1));
            }

            if (this.restartInterval === 0) {
                current = this.decodeUnit(pred, temp, index);

                while ((current === 0) && ((this.xLoc < this.xDim) && (this.yLoc < this.yDim))) {
                    this.output(pred);
                    current = this.decodeUnit(pred, temp, index);
                }

                break; //current=MARKER
            }

            for (mcuNum = 0; mcuNum < this.restartInterval; mcuNum+=1) {
                this.restarting = (mcuNum == 0);
                current = this.decodeUnit(pred, temp, index);
                this.output(pred);

                if (current !== 0) {
                    break;
                }
            }

            if (current === 0) {
                if (this.markerIndex !== 0) {
                    current = (0xFF00 | this.marker);
                    this.markerIndex = 0;
                } else {
                    current = this.stream.get16();
                }
            }

            if (!((current >= jpeg.lossless.Decoder.RESTART_MARKER_BEGIN) &&
                (current <= jpeg.lossless.Decoder.RESTART_MARKER_END))) {
                break; //current=MARKER
            }
        }

        if ((current === 0xFFDC) && (scanNum === 1)) { //DNL
            this.readNumber();
            current = this.stream.get16();
        }
    } while ((current !== 0xFFD9) && ((this.xLoc < this.xDim) && (this.yLoc < this.yDim)) && (scanNum === 0));

    return this.outputData;
};



jpeg.lossless.Decoder.prototype.decodeUnit = function (prev, temp, index) {
    if (this.numComp == 1) {
        return this.decodeSingle(prev, temp, index);
    } else if (this.numComp == 3) {
        return this.decodeRGB(prev, temp, index);
    } else {
        return -1;
    }
};



jpeg.lossless.Decoder.prototype.select1 = function (compOffset) {
    return this.getPreviousX(compOffset);
};



jpeg.lossless.Decoder.prototype.select2 = function (compOffset) {
    return this.getPreviousY(compOffset);
};



jpeg.lossless.Decoder.prototype.select3 = function (compOffset) {
    return this.getPreviousXY(compOffset);
};



jpeg.lossless.Decoder.prototype.select4 = function (compOffset) {
    return (this.getPreviousX(compOffset) + this.getPreviousY(compOffset)) - this.getPreviousXY(compOffset);
};



jpeg.lossless.Decoder.prototype.select5 = function (compOffset) {
    return this.getPreviousX(compOffset) + ((this.getPreviousY(compOffset) - this.getPreviousXY(compOffset)) >> 1);
};



jpeg.lossless.Decoder.prototype.select6 = function (compOffset) {
    return this.getPreviousY(compOffset) + ((this.getPreviousX(compOffset) - this.getPreviousXY(compOffset)) >> 1);
};



jpeg.lossless.Decoder.prototype.select7 = function (compOffset) {
    return ((this.getPreviousX(compOffset) + this.getPreviousY(compOffset)) / 2);
};



jpeg.lossless.Decoder.prototype.decodeRGB = function (prev, temp, index) {
    /*jslint bitwise: true */

    var value, actab, dctab, qtab, ctrC, i, k, j;

    prev[0] = this.selector(0);
    prev[1] = this.selector(1);
    prev[2] = this.selector(2);

    for (ctrC = 0; ctrC < this.numComp; ctrC+=1) {
        qtab = this.qTab[ctrC];
        actab = this.acTab[ctrC];
        dctab = this.dcTab[ctrC];
        for (i = 0; i < this.nBlock[ctrC]; i+=1) {
            for (k = 0; k < this.IDCT_Source.length; k+=1) {
                this.IDCT_Source[k] = 0;
            }

            value = this.getHuffmanValue(dctab, temp, index);

            if (value >= 0xFF00) {
                return value;
            }

            prev[ctrC] = this.IDCT_Source[0] = prev[ctrC] + this.getn(index, value, temp, index);
            this.IDCT_Source[0] *= qtab[0];

            for (j = 1; j < 64; j+=1) {
                value = this.getHuffmanValue(actab, temp, index);

                if (value >= 0xFF00) {
                    return value;
                }

                j += (value >> 4);

                if ((value & 0x0F) === 0) {
                    if ((value >> 4) === 0) {
                        break;
                    }
                } else {
                    this.IDCT_Source[jpeg.lossless.Decoder.IDCT_P[j]] = this.getn(index, value & 0x0F, temp, index) * qtab[j];
                }
            }
        }
    }

    return 0;
};



jpeg.lossless.Decoder.prototype.decodeSingle = function (prev, temp, index) {
    /*jslint bitwise: true */

    var value, i, n, nRestart;

    if (this.restarting) {
        this.restarting = false;
        prev[0] = (1 << (this.frame.precision - 1));
    } else {
        prev[0] = this.selector();
    }

    for (i = 0; i < this.nBlock[0]; i+=1) {
        value = this.getHuffmanValue(this.dcTab[0], temp, index);
        if (value >= 0xFF00) {
            return value;
        }

        n = this.getn(prev, value, temp, index);
        nRestart = (n >> 8);

        if ((nRestart >= jpeg.lossless.Decoder.RESTART_MARKER_BEGIN) && (nRestart <= jpeg.lossless.Decoder.RESTART_MARKER_END)) {
            return nRestart;
        }

        prev[0] += n;
    }

    return 0;
};



//	Huffman table for fast search: (HuffTab) 8-bit Look up table 2-layer search architecture, 1st-layer represent 256 node (8 bits) if codeword-length > 8
//	bits, then the entry of 1st-layer = (# of 2nd-layer table) | MSB and it is stored in the 2nd-layer Size of tables in each layer are 256.
//	HuffTab[*][*][0-256] is always the only 1st-layer table.
//
//	An entry can be: (1) (# of 2nd-layer table) | MSB , for code length > 8 in 1st-layer (2) (Code length) << 8 | HuffVal
//
//	HuffmanValue(table   HuffTab[x][y] (ex) HuffmanValue(HuffTab[1][0],...)
//	                ):
//	    return: Huffman Value of table
//	            0xFF?? if it receives a MARKER
//	    Parameter:  table   HuffTab[x][y] (ex) HuffmanValue(HuffTab[1][0],...)
//	                temp    temp storage for remainded bits
//	                index   index to bit of temp
//	                in      FILE pointer
//	    Effect:
//	        temp  store new remainded bits
//	        index change to new index
//	        in    change to new position
//	    NOTE:
//	      Initial by   temp=0; index=0;
//	    NOTE: (explain temp and index)
//	      temp: is always in the form at calling time or returning time
//	       |  byte 4  |  byte 3  |  byte 2  |  byte 1  |
//	       |     0    |     0    | 00000000 | 00000??? |  if not a MARKER
//	                                               ^index=3 (from 0 to 15)
//	                                               321
//	    NOTE (marker and marker_index):
//	      If get a MARKER from 'in', marker=the low-byte of the MARKER
//	        and marker_index=9
//	      If marker_index=9 then index is always > 8, or HuffmanValue()
//	        will not be called
jpeg.lossless.Decoder.prototype.getHuffmanValue = function (table, temp, index) {
    /*jslint bitwise: true */

    var code, input, mask;
    mask = 0xFFFF;

    if (index[0] < 8) {
        temp[0] <<= 8;
        input = this.stream.get8();
        if (input === 0xFF) {
            this.marker = this.stream.get8();
            if (this.marker !== 0) {
                this.markerIndex = 9;
            }
        }
        temp[0] |= input;
    } else {
        index[0] -= 8;
    }

    code = table[temp[0] >> index[0]];

    if ((code & jpeg.lossless.Decoder.MSB) !== 0) {
        if (this.markerIndex !== 0) {
            this.markerIndex = 0;
            return 0xFF00 | this.marker;
        }

        temp[0] &= (mask >> (16 - index[0]));
        temp[0] <<= 8;
        input = this.stream.get8();

        if (input === 0xFF) {
            this.marker = this.stream.get8();
            if (this.marker !== 0) {
                this.markerIndex = 9;
            }
        }

        temp[0] |= input;
        code = table[((code & 0xFF) * 256) + (temp[0] >> index[0])];
        index[0] += 8;
    }

    index[0] += 8 - (code >> 8);

    if (index[0] < 0) {
        throw new Error("index=" + index[0] + " temp=" + temp[0] + " code=" + code + " in HuffmanValue()");
    }

    if (index[0] < this.markerIndex) {
        this.markerIndex = 0;
        return 0xFF00 | this.marker;
    }

    temp[0] &= (mask >> (16 - index[0]));
    return code & 0xFF;
};



jpeg.lossless.Decoder.prototype.getn = function (PRED, n, temp, index) {
    /*jslint bitwise: true */

    var result, one, n_one, mask, input;
    one = 1;
    n_one = -1;
    mask = 0xFFFF;

    if (n === 0) {
        return 0;
    }

    if (n === 16) {
        if (PRED[0] >= 0) {
            return -32768;
        } else {
            return 32768;
        }
    }

    index[0] -= n;

    if (index[0] >= 0) {
        if ((index[0] < this.markerIndex) && !this.isLastPixel()) { // this was corrupting the last pixel in some cases
            this.markerIndex = 0;
            return (0xFF00 | this.marker) << 8;
        }

        result = temp[0] >> index[0];
        temp[0] &= (mask >> (16 - index[0]));
    } else {
        temp[0] <<= 8;
        input = this.stream.get8();

        if (input === 0xFF) {
            this.marker = this.stream.get8();
            if (this.marker !== 0) {
                this.markerIndex = 9;
            }
        }

        temp[0] |= input;
        index[0] += 8;

        if (index[0] < 0) {
            if (this.markerIndex !== 0) {
                this.markerIndex = 0;
                return (0xFF00 | this.marker) << 8;
            }

            temp[0] <<= 8;
            input = this.stream.get8();

            if (input === 0xFF) {
                this.marker = this.stream.get8();
                if (this.marker !== 0) {
                    this.markerIndex = 9;
                }
            }

            temp[0] |= input;
            index[0] += 8;
        }

        if (index[0] < 0) {
            throw new Error("index=" + index[0] + " in getn()");
        }

        if (index[0] < this.markerIndex) {
            this.markerIndex = 0;
            return (0xFF00 | this.marker) << 8;
        }

        result = temp[0] >> index[0];
        temp[0] &= (mask >> (16 - index[0]));
    }

    if (result < (one << (n - 1))) {
        result += (n_one << n) + 1;
    }

    return result;
};



jpeg.lossless.Decoder.prototype.getPreviousX = function (compOffset) {
    /*jslint bitwise: true */

    if (this.xLoc > 0) {
        return this.getter((((this.yLoc * this.xDim) + this.xLoc) - 1), compOffset);
    } else if (this.yLoc > 0) {
        return this.getPreviousY(compOffset);
    } else {
        return (1 << (this.frame.precision - 1));
    }
};



jpeg.lossless.Decoder.prototype.getPreviousXY = function (compOffset) {
    /*jslint bitwise: true */

    if ((this.xLoc > 0) && (this.yLoc > 0)) {
        return this.getter(((((this.yLoc - 1) * this.xDim) + this.xLoc) - 1), compOffset);
    } else {
        return this.getPreviousY(compOffset);
    }
};



jpeg.lossless.Decoder.prototype.getPreviousY = function (compOffset) {
    /*jslint bitwise: true */

    if (this.yLoc > 0) {
        return this.getter((((this.yLoc - 1) * this.xDim) + this.xLoc), compOffset);
    } else {
        return this.getPreviousX(compOffset);
    }
};



jpeg.lossless.Decoder.prototype.isLastPixel = function () {
    return (this.xLoc === (this.xDim - 1)) && (this.yLoc === (this.yDim - 1));
};



jpeg.lossless.Decoder.prototype.outputSingle = function (PRED) {
    if ((this.xLoc < this.xDim) && (this.yLoc < this.yDim)) {
        this.setter((((this.yLoc * this.xDim) + this.xLoc)), this.mask & PRED[0]);

        this.xLoc+=1;

        if (this.xLoc >= this.xDim) {
            this.yLoc+=1;
            this.xLoc = 0;
        }
    }
};



jpeg.lossless.Decoder.prototype.outputRGB = function (PRED) {
    var offset = ((this.yLoc * this.xDim) + this.xLoc);

    if ((this.xLoc < this.xDim) && (this.yLoc < this.yDim)) {
        this.setter(offset, PRED[0], 0);
        this.setter(offset, PRED[1], 1);
        this.setter(offset, PRED[2], 2);

        this.xLoc+=1;

        if (this.xLoc >= this.xDim) {
            this.yLoc+=1;
            this.xLoc = 0;
        }
    }
};

jpeg.lossless.Decoder.prototype.setValue8 = function (index, val) {
    this.outputData[index] = val; 
};

jpeg.lossless.Decoder.prototype.getValue8 = function (index) {
    return this.outputData[index]; // mask should not be necessary because outputData is either Int8Array or Int16Array
};

var littleEndian = (function() {
    var buffer = new ArrayBuffer(2);
    new DataView(buffer).setInt16(0, 256, true /* littleEndian */);
    // Int16Array uses the platform's endianness.
    return new Int16Array(buffer)[0] === 256;
})();

if (littleEndian) {
    // just reading from an array is fine then. Int16Array will use platform endianness.
    jpeg.lossless.Decoder.prototype.setValue16 = jpeg.lossless.Decoder.prototype.setValue8; 
    jpeg.lossless.Decoder.prototype.getValue16 = jpeg.lossless.Decoder.prototype.getValue8;
} 
else {
    // If platform is big-endian, we will need to convert to little-endian 
    jpeg.lossless.Decoder.prototype.setValue16 = function (index, val) {
        this.outputData[index] = ((val & 0xFF) << 8) | ((val >> 8) & 0xFF); 
    };

    jpeg.lossless.Decoder.prototype.getValue16 = function (index) {
        var val = this.outputData[index];
        return ((val & 0xFF) << 8) | ((val >> 8) & 0xFF);
    };
}

jpeg.lossless.Decoder.prototype.setValueRGB = function (index, val, compOffset) {
    // this.outputData.setUint8(index * 3 + compOffset, val);
    this.outputData[index * 3 + compOffset] = val;
};

jpeg.lossless.Decoder.prototype.getValueRGB = function (index, compOffset) {
    // return this.outputData.getUint8(index * 3 + compOffset);
    return this.outputData[index * 3 + compOffset];
};



jpeg.lossless.Decoder.prototype.readApp = function() {
    var count = 0, length = this.stream.get16();
    count += 2;

    while (count < length) {
        this.stream.get8();
        count+=1;
    }

    return length;
};



jpeg.lossless.Decoder.prototype.readComment = function () {
    var sb = "", count = 0, length;

    length = this.stream.get16();
    count += 2;

    while (count < length) {
        sb += this.stream.get8();
        count+=1;
    }

    return sb;
};



jpeg.lossless.Decoder.prototype.readNumber = function() {
    var Ld = this.stream.get16();

    if (Ld !== 4) {
        throw new Error("ERROR: Define number format throw new IOException [Ld!=4]");
    }

    return this.stream.get16();
};



/*** Exports ***/

var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
    module.exports = jpeg.lossless.Decoder;
}

},{"./data-stream.js":9,"./frame-header.js":11,"./huffman-table.js":12,"./quantization-table.js":14,"./scan-header.js":16,"./utils.js":17}],11:[function(require,module,exports){
/*
 * Copyright (C) 2015 Michael Martinez
 * Changes: Added support for selection values 2-7, fixed minor bugs &
 * warnings, split into multiple class files, and general clean up.
 *
 * 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
 */

/*
 * Copyright (C) Helmut Dersch
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*jslint browser: true, node: true */
/*global require, module */

"use strict";

/*** Imports ***/
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
jpeg.lossless.ComponentSpec = jpeg.lossless.ComponentSpec || ((typeof require !== 'undefined') ? require('./component-spec.js') : null);
jpeg.lossless.DataStream = jpeg.lossless.DataStream || ((typeof require !== 'undefined') ? require('./data-stream.js') : null);


/*** Constructor ***/
jpeg.lossless.FrameHeader = jpeg.lossless.FrameHeader || function () {
    this.components = []; // Components
    this.dimX = 0; // Number of samples per line
    this.dimY = 0; // Number of lines
    this.numComp = 0; // Number of component in the frame
    this.precision = 0; // Sample Precision (from the original image)
};



/*** Prototype Methods ***/

jpeg.lossless.FrameHeader.prototype.read = function (data) {
    /*jslint bitwise: true */

    var count = 0, length, i, c, temp;

    length = data.get16();
    count += 2;

    this.precision = data.get8();
    count+=1;

    this.dimY = data.get16();
    count += 2;

    this.dimX = data.get16();
    count += 2;

    this.numComp = data.get8();
    count+=1;
    for (i = 1; i <= this.numComp; i+=1) {
        if (count > length) {
            throw new Error("ERROR: frame format error");
        }

        c = data.get8();
        count+=1;

        if (count >= length) {
            throw new Error("ERROR: frame format error [c>=Lf]");
        }

        temp = data.get8();
        count+=1;

        if (!this.components[c]) {
            this.components[c] = new jpeg.lossless.ComponentSpec();
        }

        this.components[c].hSamp = temp >> 4;
        this.components[c].vSamp = temp & 0x0F;
        this.components[c].quantTableSel = data.get8();
        count+=1;
    }

    if (count !== length) {
        throw new Error("ERROR: frame format error [Lf!=count]");
    }

    return 1;
};


/*** Exports ***/

var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
    module.exports = jpeg.lossless.FrameHeader;
}

},{"./component-spec.js":8,"./data-stream.js":9}],12:[function(require,module,exports){
/*
 * Copyright (C) 2015 Michael Martinez
 * Changes: Added support for selection values 2-7, fixed minor bugs &
 * warnings, split into multiple class files, and general clean up.
 *
 * 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
 */

/*
 * Copyright (C) Helmut Dersch
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*jslint browser: true, node: true */
/*global require, module */

"use strict";

/*** Imports ***/
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
jpeg.lossless.DataStream = jpeg.lossless.DataStream || ((typeof require !== 'undefined') ? require('./data-stream.js') : null);
jpeg.lossless.Utils = jpeg.lossless.Utils || ((typeof require !== 'undefined') ? require('./utils.js') : null);


/*** Constructor ***/
jpeg.lossless.HuffmanTable = jpeg.lossless.HuffmanTable || function () {
    this.l = jpeg.lossless.Utils.createArray(4, 2, 16);
    this.th = [];
    this.v = jpeg.lossless.Utils.createArray(4, 2, 16, 200);
    this.tc = jpeg.lossless.Utils.createArray(4, 2);

    this.tc[0][0] = 0;
    this.tc[1][0] = 0;
    this.tc[2][0] = 0;
    this.tc[3][0] = 0;
    this.tc[0][1] = 0;
    this.tc[1][1] = 0;
    this.tc[2][1] = 0;
    this.tc[3][1] = 0;
    this.th[0] = 0;
    this.th[1] = 0;
    this.th[2] = 0;
    this.th[3] = 0;
};



/*** Static Pseudo-constants ***/

jpeg.lossless.HuffmanTable.MSB = 0x80000000;


/*** Prototype Methods ***/

jpeg.lossless.HuffmanTable.prototype.read = function(data, HuffTab) {
    /*jslint bitwise: true */

    var count = 0, length, temp, t, c, i, j;

    length = data.get16();
    count += 2;

    while (count < length) {
        temp = data.get8();
        count+=1;
        t = temp & 0x0F;
        if (t > 3) {
            throw new Error("ERROR: Huffman table ID > 3");
        }

        c = temp >> 4;
        if (c > 2) {
            throw new Error("ERROR: Huffman table [Table class > 2 ]");
        }

        this.th[t] = 1;
        this.tc[t][c] = 1;

        for (i = 0; i < 16; i+=1) {
            this.l[t][c][i] = data.get8();
            count+=1;
        }

        for (i = 0; i < 16; i+=1) {
            for (j = 0; j < this.l[t][c][i]; j+=1) {
                if (count > length) {
                    throw new Error("ERROR: Huffman table format error [count>Lh]");
                }

                this.v[t][c][i][j] = data.get8();
                count+=1;
            }
        }
    }

    if (count !== length) {
        throw new Error("ERROR: Huffman table format error [count!=Lf]");
    }

    for (i = 0; i < 4; i+=1) {
        for (j = 0; j < 2; j+=1) {
            if (this.tc[i][j] !== 0) {
                this.buildHuffTable(HuffTab[i][j], this.l[i][j], this.v[i][j]);
            }
        }
    }

    return 1;
};



//	Build_HuffTab()
//	Parameter:  t       table ID
//	            c       table class ( 0 for DC, 1 for AC )
//	            L[i]    # of codewords which length is i
//	            V[i][j] Huffman Value (length=i)
//	Effect:
//	    build up HuffTab[t][c] using L and V.
jpeg.lossless.HuffmanTable.prototype.buildHuffTable = function(tab, L, V) {
    /*jslint bitwise: true */

    var currentTable, temp, k, i, j, n;
    temp = 256;
    k = 0;

    for (i = 0; i < 8; i+=1) { // i+1 is Code length
        for (j = 0; j < L[i]; j+=1) {
            for (n = 0; n < (temp >> (i + 1)); n+=1) {
                tab[k] = V[i][j] | ((i + 1) << 8);
                k+=1;
            }
        }
    }

    for (i = 1; k < 256; i+=1, k+=1) {
        tab[k] = i | jpeg.lossless.HuffmanTable.MSB;
    }

    currentTable = 1;
    k = 0;

    for (i = 8; i < 16; i+=1) { // i+1 is Code length
        for (j = 0; j < L[i]; j+=1) {
            for (n = 0; n < (temp >> (i - 7)); n+=1) {
                tab[(currentTable * 256) + k] = V[i][j] | ((i + 1) << 8);
                k+=1;
            }

            if (k >= 256) {
                if (k > 256) {
                    throw new Error("ERROR: Huffman table error(1)!");
                }

                k = 0;
                currentTable+=1;
            }
        }
    }
};


/*** Exports ***/

var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
    module.exports = jpeg.lossless.HuffmanTable;
}

},{"./data-stream.js":9,"./utils.js":17}],13:[function(require,module,exports){
/*jslint browser: true, node: true */
/*global require, module */

"use strict";

/*** Imports ****/

/**
 * jpeg
  * @type {*|{}}
 */
var jpeg = jpeg || {};

/**
 * jpeg.lossless
 * @type {*|{}}
 */
jpeg.lossless = jpeg.lossless || {};


jpeg.lossless.ComponentSpec = jpeg.lossless.ComponentSpec || ((typeof require !== 'undefined') ? require('./component-spec.js') : null);
jpeg.lossless.DataStream = jpeg.lossless.DataStream || ((typeof require !== 'undefined') ? require('./data-stream.js') : null);
jpeg.lossless.Decoder = jpeg.lossless.Decoder || ((typeof require !== 'undefined') ? require('./decoder.js') : null);
jpeg.lossless.FrameHeader = jpeg.lossless.FrameHeader || ((typeof require !== 'undefined') ? require('./frame-header.js') : null);
jpeg.lossless.HuffmanTable = jpeg.lossless.HuffmanTable || ((typeof require !== 'undefined') ? require('./huffman-table.js') : null);
jpeg.lossless.QuantizationTable = jpeg.lossless.QuantizationTable || ((typeof require !== 'undefined') ? require('./quantization-table.js') : null);
jpeg.lossless.ScanComponent = jpeg.lossless.ScanComponent || ((typeof require !== 'undefined') ? require('./scan-component.js') : null);
jpeg.lossless.ScanHeader = jpeg.lossless.ScanHeader || ((typeof require !== 'undefined') ? require('./scan-header.js') : null);
jpeg.lossless.Utils = jpeg.lossless.Utils || ((typeof require !== 'undefined') ? require('./utils.js') : null);


/*** Exports ***/
var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
    module.exports = jpeg;
}

},{"./component-spec.js":8,"./data-stream.js":9,"./decoder.js":10,"./frame-header.js":11,"./huffman-table.js":12,"./quantization-table.js":14,"./scan-component.js":15,"./scan-header.js":16,"./utils.js":17}],14:[function(require,module,exports){
/*
 * Copyright (C) 2015 Michael Martinez
 * Changes: Added support for selection values 2-7, fixed minor bugs &
 * warnings, split into multiple class files, and general clean up.
 *
 * 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
 */

/*
 * Copyright (C) Helmut Dersch
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*jslint browser: true, node: true */
/*global require, module */

"use strict";

/*** Imports ***/
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
jpeg.lossless.DataStream = jpeg.lossless.DataStream || ((typeof require !== 'undefined') ? require('./data-stream.js') : null);
jpeg.lossless.Utils = jpeg.lossless.Utils || ((typeof require !== 'undefined') ? require('./utils.js') : null);


/*** Constructor ***/
jpeg.lossless.QuantizationTable = jpeg.lossless.QuantizationTable || function () {
    this.precision = []; // Quantization precision 8 or 16
    this.tq = []; // 1: this table is presented
    this.quantTables = jpeg.lossless.Utils.createArray(4, 64); // Tables

    this.tq[0] = 0;
    this.tq[1] = 0;
    this.tq[2] = 0;
    this.tq[3] = 0;
};



/*** Static Methods ***/

jpeg.lossless.QuantizationTable.enhanceQuantizationTable = function(qtab, table) {
    /*jslint bitwise: true */

    var i;

    for (i = 0; i < 8; i+=1) {
        qtab[table[(0 * 8) + i]] *= 90;
        qtab[table[(4 * 8) + i]] *= 90;
        qtab[table[(2 * 8) + i]] *= 118;
        qtab[table[(6 * 8) + i]] *= 49;
        qtab[table[(5 * 8) + i]] *= 71;
        qtab[table[(1 * 8) + i]] *= 126;
        qtab[table[(7 * 8) + i]] *= 25;
        qtab[table[(3 * 8) + i]] *= 106;
    }

    for (i = 0; i < 8; i+=1) {
        qtab[table[0 + (8 * i)]] *= 90;
        qtab[table[4 + (8 * i)]] *= 90;
        qtab[table[2 + (8 * i)]] *= 118;
        qtab[table[6 + (8 * i)]] *= 49;
        qtab[table[5 + (8 * i)]] *= 71;
        qtab[table[1 + (8 * i)]] *= 126;
        qtab[table[7 + (8 * i)]] *= 25;
        qtab[table[3 + (8 * i)]] *= 106;
    }

    for (i = 0; i < 64; i+=1) {
        qtab[i] >>= 6;
    }
};


/*** Prototype Methods ***/

jpeg.lossless.QuantizationTable.prototype.read = function (data, table) {
    /*jslint bitwise: true */

    var count = 0, length, temp, t, i;

    length = data.get16();
    count += 2;

    while (count < length) {
        temp = data.get8();
        count+=1;
        t = temp & 0x0F;

        if (t > 3) {
            throw new Error("ERROR: Quantization table ID > 3");
        }

        this.precision[t] = temp >> 4;

        if (this.precision[t] === 0) {
            this.precision[t] = 8;
        } else if (this.precision[t] === 1) {
            this.precision[t] = 16;
        } else {
            throw new Error("ERROR: Quantization table precision error");
        }

        this.tq[t] = 1;

        if (this.precision[t] === 8) {
            for (i = 0; i < 64; i+=1) {
                if (count > length) {
                    throw new Error("ERROR: Quantization table format error");
                }

                this.quantTables[t][i] = data.get8();
                count+=1;
            }

            jpeg.lossless.QuantizationTable.enhanceQuantizationTable(this.quantTables[t], table);
        } else {
            for (i = 0; i < 64; i+=1) {
                if (count > length) {
                    throw new Error("ERROR: Quantization table format error");
                }

                this.quantTables[t][i] = data.get16();
                count += 2;
            }

            jpeg.lossless.QuantizationTable.enhanceQuantizationTable(this.quantTables[t], table);
        }
    }

    if (count !== length) {
        throw new Error("ERROR: Quantization table error [count!=Lq]");
    }

    return 1;
};



/*** Exports ***/

var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
    module.exports = jpeg.lossless.QuantizationTable;
}

},{"./data-stream.js":9,"./utils.js":17}],15:[function(require,module,exports){
/*
 * Copyright (C) 2015 Michael Martinez
 * Changes: Added support for selection values 2-7, fixed minor bugs &
 * warnings, split into multiple class files, and general clean up.
 *
 * 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
 */

/*
 * Copyright (C) Helmut Dersch
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*jslint browser: true, node: true */
/*global require, module */

"use strict";

/*** Imports ***/
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};


/*** Constructor ***/
jpeg.lossless.ScanComponent = jpeg.lossless.ScanComponent || function () {
    this.acTabSel = 0; // AC table selector
    this.dcTabSel = 0; // DC table selector
    this.scanCompSel = 0; // Scan component selector
};



/*** Exports ***/

var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
    module.exports = jpeg.lossless.ScanComponent;
}

},{}],16:[function(require,module,exports){
/*
 * Copyright (C) 2015 Michael Martinez
 * Changes: Added support for selection values 2-7, fixed minor bugs &
 * warnings, split into multiple class files, and general clean up.
 *
 * 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
 */

/*
 * Copyright (C) Helmut Dersch
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*jslint browser: true, node: true */
/*global require, module */

"use strict";

/*** Imports ***/
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
jpeg.lossless.DataStream = jpeg.lossless.DataStream || ((typeof require !== 'undefined') ? require('./data-stream.js') : null);
jpeg.lossless.ScanComponent = jpeg.lossless.ScanComponent || ((typeof require !== 'undefined') ? require('./scan-component.js') : null);


/*** Constructor ***/
jpeg.lossless.ScanHeader = jpeg.lossless.ScanHeader || function () {
    this.ah = 0;
    this.al = 0;
    this.numComp = 0; // Number of components in the scan
    this.selection = 0; // Start of spectral or predictor selection
    this.spectralEnd = 0; // End of spectral selection
    this.components = [];
};


/*** Prototype Methods ***/

jpeg.lossless.ScanHeader.prototype.read = function(data) {
    /*jslint bitwise: true */

    var count = 0, length, i, temp;

    length = data.get16();
    count += 2;

    this.numComp = data.get8();
    count+=1;

    for (i = 0; i < this.numComp; i+=1) {
        this.components[i] = new jpeg.lossless.ScanComponent();

        if (count > length) {
            throw new Error("ERROR: scan header format error");
        }

        this.components[i].scanCompSel = data.get8();
        count+=1;

        temp = data.get8();
        count+=1;

        this.components[i].dcTabSel = (temp >> 4);
        this.components[i].acTabSel = (temp & 0x0F);
    }

    this.selection = data.get8();
    count+=1;

    this.spectralEnd = data.get8();
    count+=1;

    temp = data.get8();
    this.ah = (temp >> 4);
    this.al = (temp & 0x0F);
    count+=1;

    if (count !== length) {
        throw new Error("ERROR: scan header format error [count!=Ns]");
    }

    return 1;
};



/*** Exports ***/

var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
    module.exports = jpeg.lossless.ScanHeader;
}

},{"./data-stream.js":9,"./scan-component.js":15}],17:[function(require,module,exports){
/*
 * Copyright (C) 2015 Michael Martinez
 * Changes: Added support for selection values 2-7, fixed minor bugs &
 * warnings, split into multiple class files, and general clean up.
 *
 * 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
 */

/*
 * Copyright (C) Helmut Dersch
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*jslint browser: true, node: true */
/*global require, module */

"use strict";

/*** Imports ***/
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};


/*** Constructor ***/
jpeg.lossless.Utils = jpeg.lossless.Utils || {};


/*** Static methods ***/

// http://stackoverflow.com/questions/966225/how-can-i-create-a-two-dimensional-array-in-javascript
jpeg.lossless.Utils.createArray = function (length) {
    var arr = new Array(length || 0),
        i = length;

    if (arguments.length > 1) {
        var args = Array.prototype.slice.call(arguments, 1);
        while(i--) arr[length-1 - i] = jpeg.lossless.Utils.createArray.apply(this, args);
    }

    return arr;
};


// http://stackoverflow.com/questions/18638900/javascript-crc32
jpeg.lossless.Utils.makeCRCTable = function(){
    var c;
    var crcTable = [];
    for(var n =0; n < 256; n++){
        c = n;
        for(var k =0; k < 8; k++){
            c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
        }
        crcTable[n] = c;
    }
    return crcTable;
};

jpeg.lossless.Utils.crc32 = function(dataView) {
    var uint8view = new Uint8Array(dataView.buffer);
    var crcTable = jpeg.lossless.Utils.crcTable || (jpeg.lossless.Utils.crcTable = jpeg.lossless.Utils.makeCRCTable());
    var crc = 0 ^ (-1);

    for (var i = 0; i < uint8view.length; i++ ) {
        crc = (crc >>> 8) ^ crcTable[(crc ^ uint8view[i]) & 0xFF];
    }

    return (crc ^ (-1)) >>> 0;
};


/*** Exports ***/

var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
    module.exports = jpeg.lossless.Utils;
}

},{}],18:[function(require,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.ungzip = exports.inflateRaw = exports.inflate = exports.gzip = exports.deflateRaw = exports.deflate = exports.default = exports.constants = exports.Inflate = exports.Deflate = void 0;

/*! pako 2.0.4 https://github.com/nodeca/pako @license (MIT AND Zlib) */
// (C) 1995-2013 Jean-loup Gailly and Mark Adler
// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//   claim that you wrote the original software. If you use this software
//   in a product, an acknowledgment in the product documentation would be
//   appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//   misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.

/* eslint-disable space-unary-ops */

/* Public constants ==========================================================*/

/* ===========================================================================*/
//const Z_FILTERED          = 1;
//const Z_HUFFMAN_ONLY      = 2;
//const Z_RLE               = 3;
const Z_FIXED$1 = 4; //const Z_DEFAULT_STRATEGY  = 0;

/* Possible values of the data_type field (though see inflate()) */

const Z_BINARY = 0;
const Z_TEXT = 1; //const Z_ASCII             = 1; // = Z_TEXT

const Z_UNKNOWN$1 = 2;
/*============================================================================*/

function zero$1(buf) {
  let len = buf.length;

  while (--len >= 0) {
    buf[len] = 0;
  }
} // From zutil.h


const STORED_BLOCK = 0;
const STATIC_TREES = 1;
const DYN_TREES = 2;
/* The three kinds of block type */

const MIN_MATCH$1 = 3;
const MAX_MATCH$1 = 258;
/* The minimum and maximum match lengths */
// From deflate.h

/* ===========================================================================
 * Internal compression state.
 */

const LENGTH_CODES$1 = 29;
/* number of length codes, not counting the special END_BLOCK code */

const LITERALS$1 = 256;
/* number of literal bytes 0..255 */

const L_CODES$1 = LITERALS$1 + 1 + LENGTH_CODES$1;
/* number of Literal or Length codes, including the END_BLOCK code */

const D_CODES$1 = 30;
/* number of distance codes */

const BL_CODES$1 = 19;
/* number of codes used to transfer the bit lengths */

const HEAP_SIZE$1 = 2 * L_CODES$1 + 1;
/* maximum heap size */

const MAX_BITS$1 = 15;
/* All codes must not exceed MAX_BITS bits */

const Buf_size = 16;
/* size of bit buffer in bi_buf */

/* ===========================================================================
 * Constants
 */

const MAX_BL_BITS = 7;
/* Bit length codes must not exceed MAX_BL_BITS bits */

const END_BLOCK = 256;
/* end of block literal code */

const REP_3_6 = 16;
/* repeat previous bit length 3-6 times (2 bits of repeat count) */

const REPZ_3_10 = 17;
/* repeat a zero length 3-10 times  (3 bits of repeat count) */

const REPZ_11_138 = 18;
/* repeat a zero length 11-138 times  (7 bits of repeat count) */

/* eslint-disable comma-spacing,array-bracket-spacing */

const extra_lbits =
/* extra bits for each length code */
new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0]);
const extra_dbits =
/* extra bits for each distance code */
new Uint8Array([0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13]);
const extra_blbits =
/* extra bits for each bit length code */
new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 3, 7]);
const bl_order = new Uint8Array([16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15]);
/* eslint-enable comma-spacing,array-bracket-spacing */

/* The lengths of the bit length codes are sent in order of decreasing
 * probability, to avoid transmitting the lengths for unused bit length codes.
 */

/* ===========================================================================
 * Local data. These are initialized only once.
 */
// We pre-fill arrays with 0 to avoid uninitialized gaps

const DIST_CODE_LEN = 512;
/* see definition of array dist_code below */
// !!!! Use flat array instead of structure, Freq = i*2, Len = i*2+1

const static_ltree = new Array((L_CODES$1 + 2) * 2);
zero$1(static_ltree);
/* The static literal tree. Since the bit lengths are imposed, there is no
 * need for the L_CODES extra codes used during heap construction. However
 * The codes 286 and 287 are needed to build a canonical tree (see _tr_init
 * below).
 */

const static_dtree = new Array(D_CODES$1 * 2);
zero$1(static_dtree);
/* The static distance tree. (Actually a trivial tree since all codes use
 * 5 bits.)
 */

const _dist_code = new Array(DIST_CODE_LEN);

zero$1(_dist_code);
/* Distance codes. The first 256 values correspond to the distances
 * 3 .. 258, the last 256 values correspond to the top 8 bits of
 * the 15 bit distances.
 */

const _length_code = new Array(MAX_MATCH$1 - MIN_MATCH$1 + 1);

zero$1(_length_code);
/* length code for each normalized match length (0 == MIN_MATCH) */

const base_length = new Array(LENGTH_CODES$1);
zero$1(base_length);
/* First normalized length for each code (0 = MIN_MATCH) */

const base_dist = new Array(D_CODES$1);
zero$1(base_dist);
/* First normalized distance for each code (0 = distance of 1) */

function StaticTreeDesc(static_tree, extra_bits, extra_base, elems, max_length) {
  this.static_tree = static_tree;
  /* static tree or NULL */

  this.extra_bits = extra_bits;
  /* extra bits for each code or NULL */

  this.extra_base = extra_base;
  /* base index for extra_bits */

  this.elems = elems;
  /* max number of elements in the tree */

  this.max_length = max_length;
  /* max bit length for the codes */
  // show if `static_tree` has data or dummy - needed for monomorphic objects

  this.has_stree = static_tree && static_tree.length;
}

let static_l_desc;
let static_d_desc;
let static_bl_desc;

function TreeDesc(dyn_tree, stat_desc) {
  this.dyn_tree = dyn_tree;
  /* the dynamic tree */

  this.max_code = 0;
  /* largest code with non zero frequency */

  this.stat_desc = stat_desc;
  /* the corresponding static tree */
}

const d_code = dist => {
  return dist < 256 ? _dist_code[dist] : _dist_code[256 + (dist >>> 7)];
};
/* ===========================================================================
 * Output a short LSB first on the stream.
 * IN assertion: there is enough room in pendingBuf.
 */


const put_short = (s, w) => {
  //    put_byte(s, (uch)((w) & 0xff));
  //    put_byte(s, (uch)((ush)(w) >> 8));
  s.pending_buf[s.pending++] = w & 0xff;
  s.pending_buf[s.pending++] = w >>> 8 & 0xff;
};
/* ===========================================================================
 * Send a value on a given number of bits.
 * IN assertion: length <= 16 and value fits in length bits.
 */


const send_bits = (s, value, length) => {
  if (s.bi_valid > Buf_size - length) {
    s.bi_buf |= value << s.bi_valid & 0xffff;
    put_short(s, s.bi_buf);
    s.bi_buf = value >> Buf_size - s.bi_valid;
    s.bi_valid += length - Buf_size;
  } else {
    s.bi_buf |= value << s.bi_valid & 0xffff;
    s.bi_valid += length;
  }
};

const send_code = (s, c, tree) => {
  send_bits(s, tree[c * 2]
  /*.Code*/
  , tree[c * 2 + 1]
  /*.Len*/
  );
};
/* ===========================================================================
 * Reverse the first len bits of a code, using straightforward code (a faster
 * method would use a table)
 * IN assertion: 1 <= len <= 15
 */


const bi_reverse = (code, len) => {
  let res = 0;

  do {
    res |= code & 1;
    code >>>= 1;
    res <<= 1;
  } while (--len > 0);

  return res >>> 1;
};
/* ===========================================================================
 * Flush the bit buffer, keeping at most 7 bits in it.
 */


const bi_flush = s => {
  if (s.bi_valid === 16) {
    put_short(s, s.bi_buf);
    s.bi_buf = 0;
    s.bi_valid = 0;
  } else if (s.bi_valid >= 8) {
    s.pending_buf[s.pending++] = s.bi_buf & 0xff;
    s.bi_buf >>= 8;
    s.bi_valid -= 8;
  }
};
/* ===========================================================================
 * Compute the optimal bit lengths for a tree and update the total bit length
 * for the current block.
 * IN assertion: the fields freq and dad are set, heap[heap_max] and
 *    above are the tree nodes sorted by increasing frequency.
 * OUT assertions: the field len is set to the optimal bit length, the
 *     array bl_count contains the frequencies for each bit length.
 *     The length opt_len is updated; static_len is also updated if stree is
 *     not null.
 */


const gen_bitlen = (s, desc) => //    deflate_state *s;
//    tree_desc *desc;    /* the tree descriptor */
{
  const tree = desc.dyn_tree;
  const max_code = desc.max_code;
  const stree = desc.stat_desc.static_tree;
  const has_stree = desc.stat_desc.has_stree;
  const extra = desc.stat_desc.extra_bits;
  const base = desc.stat_desc.extra_base;
  const max_length = desc.stat_desc.max_length;
  let h;
  /* heap index */

  let n, m;
  /* iterate over the tree elements */

  let bits;
  /* bit length */

  let xbits;
  /* extra bits */

  let f;
  /* frequency */

  let overflow = 0;
  /* number of elements with bit length too large */

  for (bits = 0; bits <= MAX_BITS$1; bits++) {
    s.bl_count[bits] = 0;
  }
  /* In a first pass, compute the optimal bit lengths (which may
   * overflow in the case of the bit length tree).
   */


  tree[s.heap[s.heap_max] * 2 + 1]
  /*.Len*/
  = 0;
  /* root of the heap */

  for (h = s.heap_max + 1; h < HEAP_SIZE$1; h++) {
    n = s.heap[h];
    bits = tree[tree[n * 2 + 1]
    /*.Dad*/
    * 2 + 1]
    /*.Len*/
    + 1;

    if (bits > max_length) {
      bits = max_length;
      overflow++;
    }

    tree[n * 2 + 1]
    /*.Len*/
    = bits;
    /* We overwrite tree[n].Dad which is no longer needed */

    if (n > max_code) {
      continue;
    }
    /* not a leaf node */


    s.bl_count[bits]++;
    xbits = 0;

    if (n >= base) {
      xbits = extra[n - base];
    }

    f = tree[n * 2]
    /*.Freq*/
    ;
    s.opt_len += f * (bits + xbits);

    if (has_stree) {
      s.static_len += f * (stree[n * 2 + 1]
      /*.Len*/
      + xbits);
    }
  }

  if (overflow === 0) {
    return;
  } // Trace((stderr,"\nbit length overflow\n"));

  /* This happens for example on obj2 and pic of the Calgary corpus */

  /* Find the first bit length which could increase: */


  do {
    bits = max_length - 1;

    while (s.bl_count[bits] === 0) {
      bits--;
    }

    s.bl_count[bits]--;
    /* move one leaf down the tree */

    s.bl_count[bits + 1] += 2;
    /* move one overflow item as its brother */

    s.bl_count[max_length]--;
    /* The brother of the overflow item also moves one step up,
     * but this does not affect bl_count[max_length]
     */

    overflow -= 2;
  } while (overflow > 0);
  /* Now recompute all bit lengths, scanning in increasing frequency.
   * h is still equal to HEAP_SIZE. (It is simpler to reconstruct all
   * lengths instead of fixing only the wrong ones. This idea is taken
   * from 'ar' written by Haruhiko Okumura.)
   */


  for (bits = max_length; bits !== 0; bits--) {
    n = s.bl_count[bits];

    while (n !== 0) {
      m = s.heap[--h];

      if (m > max_code) {
        continue;
      }

      if (tree[m * 2 + 1]
      /*.Len*/
      !== bits) {
        // Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
        s.opt_len += (bits - tree[m * 2 + 1]
        /*.Len*/
        ) * tree[m * 2]
        /*.Freq*/
        ;
        tree[m * 2 + 1]
        /*.Len*/
        = bits;
      }

      n--;
    }
  }
};
/* ===========================================================================
 * Generate the codes for a given tree and bit counts (which need not be
 * optimal).
 * IN assertion: the array bl_count contains the bit length statistics for
 * the given tree and the field len is set for all tree elements.
 * OUT assertion: the field code is set for all tree elements of non
 *     zero code length.
 */


const gen_codes = (tree, max_code, bl_count) => //    ct_data *tree;             /* the tree to decorate */
//    int max_code;              /* largest code with non zero frequency */
//    ushf *bl_count;            /* number of codes at each bit length */
{
  const next_code = new Array(MAX_BITS$1 + 1);
  /* next code value for each bit length */

  let code = 0;
  /* running code value */

  let bits;
  /* bit index */

  let n;
  /* code index */

  /* The distribution counts are first used to generate the code values
   * without bit reversal.
   */

  for (bits = 1; bits <= MAX_BITS$1; bits++) {
    next_code[bits] = code = code + bl_count[bits - 1] << 1;
  }
  /* Check that the bit counts in bl_count are consistent. The last code
   * must be all ones.
   */
  //Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,
  //        "inconsistent bit counts");
  //Tracev((stderr,"\ngen_codes: max_code %d ", max_code));


  for (n = 0; n <= max_code; n++) {
    let len = tree[n * 2 + 1]
    /*.Len*/
    ;

    if (len === 0) {
      continue;
    }
    /* Now reverse the bits */


    tree[n * 2]
    /*.Code*/
    = bi_reverse(next_code[len]++, len); //Tracecv(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
    //     n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
  }
};
/* ===========================================================================
 * Initialize the various 'constant' tables.
 */


const tr_static_init = () => {
  let n;
  /* iterates over tree elements */

  let bits;
  /* bit counter */

  let length;
  /* length value */

  let code;
  /* code value */

  let dist;
  /* distance index */

  const bl_count = new Array(MAX_BITS$1 + 1);
  /* number of codes at each bit length for an optimal tree */
  // do check in _tr_init()
  //if (static_init_done) return;

  /* For some embedded targets, global variables are not initialized: */

  /*#ifdef NO_INIT_GLOBAL_POINTERS
    static_l_desc.static_tree = static_ltree;
    static_l_desc.extra_bits = extra_lbits;
    static_d_desc.static_tree = static_dtree;
    static_d_desc.extra_bits = extra_dbits;
    static_bl_desc.extra_bits = extra_blbits;
  #endif*/

  /* Initialize the mapping length (0..255) -> length code (0..28) */

  length = 0;

  for (code = 0; code < LENGTH_CODES$1 - 1; code++) {
    base_length[code] = length;

    for (n = 0; n < 1 << extra_lbits[code]; n++) {
      _length_code[length++] = code;
    }
  } //Assert (length == 256, "tr_static_init: length != 256");

  /* Note that the length 255 (match length 258) can be represented
   * in two different ways: code 284 + 5 bits or code 285, so we
   * overwrite length_code[255] to use the best encoding:
   */


  _length_code[length - 1] = code;
  /* Initialize the mapping dist (0..32K) -> dist code (0..29) */

  dist = 0;

  for (code = 0; code < 16; code++) {
    base_dist[code] = dist;

    for (n = 0; n < 1 << extra_dbits[code]; n++) {
      _dist_code[dist++] = code;
    }
  } //Assert (dist == 256, "tr_static_init: dist != 256");


  dist >>= 7;
  /* from now on, all distances are divided by 128 */

  for (; code < D_CODES$1; code++) {
    base_dist[code] = dist << 7;

    for (n = 0; n < 1 << extra_dbits[code] - 7; n++) {
      _dist_code[256 + dist++] = code;
    }
  } //Assert (dist == 256, "tr_static_init: 256+dist != 512");

  /* Construct the codes of the static literal tree */


  for (bits = 0; bits <= MAX_BITS$1; bits++) {
    bl_count[bits] = 0;
  }

  n = 0;

  while (n <= 143) {
    static_ltree[n * 2 + 1]
    /*.Len*/
    = 8;
    n++;
    bl_count[8]++;
  }

  while (n <= 255) {
    static_ltree[n * 2 + 1]
    /*.Len*/
    = 9;
    n++;
    bl_count[9]++;
  }

  while (n <= 279) {
    static_ltree[n * 2 + 1]
    /*.Len*/
    = 7;
    n++;
    bl_count[7]++;
  }

  while (n <= 287) {
    static_ltree[n * 2 + 1]
    /*.Len*/
    = 8;
    n++;
    bl_count[8]++;
  }
  /* Codes 286 and 287 do not exist, but we must include them in the
   * tree construction to get a canonical Huffman tree (longest code
   * all ones)
   */


  gen_codes(static_ltree, L_CODES$1 + 1, bl_count);
  /* The static distance tree is trivial: */

  for (n = 0; n < D_CODES$1; n++) {
    static_dtree[n * 2 + 1]
    /*.Len*/
    = 5;
    static_dtree[n * 2]
    /*.Code*/
    = bi_reverse(n, 5);
  } // Now data ready and we can init static trees


  static_l_desc = new StaticTreeDesc(static_ltree, extra_lbits, LITERALS$1 + 1, L_CODES$1, MAX_BITS$1);
  static_d_desc = new StaticTreeDesc(static_dtree, extra_dbits, 0, D_CODES$1, MAX_BITS$1);
  static_bl_desc = new StaticTreeDesc(new Array(0), extra_blbits, 0, BL_CODES$1, MAX_BL_BITS); //static_init_done = true;
};
/* ===========================================================================
 * Initialize a new block.
 */


const init_block = s => {
  let n;
  /* iterates over tree elements */

  /* Initialize the trees. */

  for (n = 0; n < L_CODES$1; n++) {
    s.dyn_ltree[n * 2]
    /*.Freq*/
    = 0;
  }

  for (n = 0; n < D_CODES$1; n++) {
    s.dyn_dtree[n * 2]
    /*.Freq*/
    = 0;
  }

  for (n = 0; n < BL_CODES$1; n++) {
    s.bl_tree[n * 2]
    /*.Freq*/
    = 0;
  }

  s.dyn_ltree[END_BLOCK * 2]
  /*.Freq*/
  = 1;
  s.opt_len = s.static_len = 0;
  s.last_lit = s.matches = 0;
};
/* ===========================================================================
 * Flush the bit buffer and align the output on a byte boundary
 */


const bi_windup = s => {
  if (s.bi_valid > 8) {
    put_short(s, s.bi_buf);
  } else if (s.bi_valid > 0) {
    //put_byte(s, (Byte)s->bi_buf);
    s.pending_buf[s.pending++] = s.bi_buf;
  }

  s.bi_buf = 0;
  s.bi_valid = 0;
};
/* ===========================================================================
 * Copy a stored block, storing first the length and its
 * one's complement if requested.
 */


const copy_block = (s, buf, len, header) => //DeflateState *s;
//charf    *buf;    /* the input data */
//unsigned len;     /* its length */
//int      header;  /* true if block header must be written */
{
  bi_windup(s);
  /* align on byte boundary */

  if (header) {
    put_short(s, len);
    put_short(s, ~len);
  } //  while (len--) {
  //    put_byte(s, *buf++);
  //  }


  s.pending_buf.set(s.window.subarray(buf, buf + len), s.pending);
  s.pending += len;
};
/* ===========================================================================
 * Compares to subtrees, using the tree depth as tie breaker when
 * the subtrees have equal frequency. This minimizes the worst case length.
 */


const smaller = (tree, n, m, depth) => {
  const _n2 = n * 2;

  const _m2 = m * 2;

  return tree[_n2]
  /*.Freq*/
  < tree[_m2]
  /*.Freq*/
  || tree[_n2]
  /*.Freq*/
  === tree[_m2]
  /*.Freq*/
  && depth[n] <= depth[m];
};
/* ===========================================================================
 * Restore the heap property by moving down the tree starting at node k,
 * exchanging a node with the smallest of its two sons if necessary, stopping
 * when the heap property is re-established (each father smaller than its
 * two sons).
 */


const pqdownheap = (s, tree, k) => //    deflate_state *s;
//    ct_data *tree;  /* the tree to restore */
//    int k;               /* node to move down */
{
  const v = s.heap[k];
  let j = k << 1;
  /* left son of k */

  while (j <= s.heap_len) {
    /* Set j to the smallest of the two sons: */
    if (j < s.heap_len && smaller(tree, s.heap[j + 1], s.heap[j], s.depth)) {
      j++;
    }
    /* Exit if v is smaller than both sons */


    if (smaller(tree, v, s.heap[j], s.depth)) {
      break;
    }
    /* Exchange v with the smallest son */


    s.heap[k] = s.heap[j];
    k = j;
    /* And continue down the tree, setting j to the left son of k */

    j <<= 1;
  }

  s.heap[k] = v;
}; // inlined manually
// const SMALLEST = 1;

/* ===========================================================================
 * Send the block data compressed using the given Huffman trees
 */


const compress_block = (s, ltree, dtree) => //    deflate_state *s;
//    const ct_data *ltree; /* literal tree */
//    const ct_data *dtree; /* distance tree */
{
  let dist;
  /* distance of matched string */

  let lc;
  /* match length or unmatched char (if dist == 0) */

  let lx = 0;
  /* running index in l_buf */

  let code;
  /* the code to send */

  let extra;
  /* number of extra bits to send */

  if (s.last_lit !== 0) {
    do {
      dist = s.pending_buf[s.d_buf + lx * 2] << 8 | s.pending_buf[s.d_buf + lx * 2 + 1];
      lc = s.pending_buf[s.l_buf + lx];
      lx++;

      if (dist === 0) {
        send_code(s, lc, ltree);
        /* send a literal byte */
        //Tracecv(isgraph(lc), (stderr," '%c' ", lc));
      } else {
        /* Here, lc is the match length - MIN_MATCH */
        code = _length_code[lc];
        send_code(s, code + LITERALS$1 + 1, ltree);
        /* send the length code */

        extra = extra_lbits[code];

        if (extra !== 0) {
          lc -= base_length[code];
          send_bits(s, lc, extra);
          /* send the extra length bits */
        }

        dist--;
        /* dist is now the match distance - 1 */

        code = d_code(dist); //Assert (code < D_CODES, "bad d_code");

        send_code(s, code, dtree);
        /* send the distance code */

        extra = extra_dbits[code];

        if (extra !== 0) {
          dist -= base_dist[code];
          send_bits(s, dist, extra);
          /* send the extra distance bits */
        }
      }
      /* literal or match pair ? */

      /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
      //Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
      //       "pendingBuf overflow");

    } while (lx < s.last_lit);
  }

  send_code(s, END_BLOCK, ltree);
};
/* ===========================================================================
 * Construct one Huffman tree and assigns the code bit strings and lengths.
 * Update the total bit length for the current block.
 * IN assertion: the field freq is set for all tree elements.
 * OUT assertions: the fields len and code are set to the optimal bit length
 *     and corresponding code. The length opt_len is updated; static_len is
 *     also updated if stree is not null. The field max_code is set.
 */


const build_tree = (s, desc) => //    deflate_state *s;
//    tree_desc *desc; /* the tree descriptor */
{
  const tree = desc.dyn_tree;
  const stree = desc.stat_desc.static_tree;
  const has_stree = desc.stat_desc.has_stree;
  const elems = desc.stat_desc.elems;
  let n, m;
  /* iterate over heap elements */

  let max_code = -1;
  /* largest code with non zero frequency */

  let node;
  /* new node being created */

  /* Construct the initial heap, with least frequent element in
   * heap[SMALLEST]. The sons of heap[n] are heap[2*n] and heap[2*n+1].
   * heap[0] is not used.
   */

  s.heap_len = 0;
  s.heap_max = HEAP_SIZE$1;

  for (n = 0; n < elems; n++) {
    if (tree[n * 2]
    /*.Freq*/
    !== 0) {
      s.heap[++s.heap_len] = max_code = n;
      s.depth[n] = 0;
    } else {
      tree[n * 2 + 1]
      /*.Len*/
      = 0;
    }
  }
  /* The pkzip format requires that at least one distance code exists,
   * and that at least one bit should be sent even if there is only one
   * possible code. So to avoid special checks later on we force at least
   * two codes of non zero frequency.
   */


  while (s.heap_len < 2) {
    node = s.heap[++s.heap_len] = max_code < 2 ? ++max_code : 0;
    tree[node * 2]
    /*.Freq*/
    = 1;
    s.depth[node] = 0;
    s.opt_len--;

    if (has_stree) {
      s.static_len -= stree[node * 2 + 1]
      /*.Len*/
      ;
    }
    /* node is 0 or 1 so it does not have extra bits */

  }

  desc.max_code = max_code;
  /* The elements heap[heap_len/2+1 .. heap_len] are leaves of the tree,
   * establish sub-heaps of increasing lengths:
   */

  for (n = s.heap_len >> 1
  /*int /2*/
  ; n >= 1; n--) {
    pqdownheap(s, tree, n);
  }
  /* Construct the Huffman tree by repeatedly combining the least two
   * frequent nodes.
   */


  node = elems;
  /* next internal node of the tree */

  do {
    //pqremove(s, tree, n);  /* n = node of least frequency */

    /*** pqremove ***/
    n = s.heap[1
    /*SMALLEST*/
    ];
    s.heap[1
    /*SMALLEST*/
    ] = s.heap[s.heap_len--];
    pqdownheap(s, tree, 1
    /*SMALLEST*/
    );
    /***/

    m = s.heap[1
    /*SMALLEST*/
    ];
    /* m = node of next least frequency */

    s.heap[--s.heap_max] = n;
    /* keep the nodes sorted by frequency */

    s.heap[--s.heap_max] = m;
    /* Create a new node father of n and m */

    tree[node * 2]
    /*.Freq*/
    = tree[n * 2]
    /*.Freq*/
    + tree[m * 2]
    /*.Freq*/
    ;
    s.depth[node] = (s.depth[n] >= s.depth[m] ? s.depth[n] : s.depth[m]) + 1;
    tree[n * 2 + 1]
    /*.Dad*/
    = tree[m * 2 + 1]
    /*.Dad*/
    = node;
    /* and insert the new node in the heap */

    s.heap[1
    /*SMALLEST*/
    ] = node++;
    pqdownheap(s, tree, 1
    /*SMALLEST*/
    );
  } while (s.heap_len >= 2);

  s.heap[--s.heap_max] = s.heap[1
  /*SMALLEST*/
  ];
  /* At this point, the fields freq and dad are set. We can now
   * generate the bit lengths.
   */

  gen_bitlen(s, desc);
  /* The field len is now set, we can generate the bit codes */

  gen_codes(tree, max_code, s.bl_count);
};
/* ===========================================================================
 * Scan a literal or distance tree to determine the frequencies of the codes
 * in the bit length tree.
 */


const scan_tree = (s, tree, max_code) => //    deflate_state *s;
//    ct_data *tree;   /* the tree to be scanned */
//    int max_code;    /* and its largest code of non zero frequency */
{
  let n;
  /* iterates over all tree elements */

  let prevlen = -1;
  /* last emitted length */

  let curlen;
  /* length of current code */

  let nextlen = tree[0 * 2 + 1]
  /*.Len*/
  ;
  /* length of next code */

  let count = 0;
  /* repeat count of the current code */

  let max_count = 7;
  /* max repeat count */

  let min_count = 4;
  /* min repeat count */

  if (nextlen === 0) {
    max_count = 138;
    min_count = 3;
  }

  tree[(max_code + 1) * 2 + 1]
  /*.Len*/
  = 0xffff;
  /* guard */

  for (n = 0; n <= max_code; n++) {
    curlen = nextlen;
    nextlen = tree[(n + 1) * 2 + 1]
    /*.Len*/
    ;

    if (++count < max_count && curlen === nextlen) {
      continue;
    } else if (count < min_count) {
      s.bl_tree[curlen * 2]
      /*.Freq*/
      += count;
    } else if (curlen !== 0) {
      if (curlen !== prevlen) {
        s.bl_tree[curlen * 2] /*.Freq*/++;
      }

      s.bl_tree[REP_3_6 * 2] /*.Freq*/++;
    } else if (count <= 10) {
      s.bl_tree[REPZ_3_10 * 2] /*.Freq*/++;
    } else {
      s.bl_tree[REPZ_11_138 * 2] /*.Freq*/++;
    }

    count = 0;
    prevlen = curlen;

    if (nextlen === 0) {
      max_count = 138;
      min_count = 3;
    } else if (curlen === nextlen) {
      max_count = 6;
      min_count = 3;
    } else {
      max_count = 7;
      min_count = 4;
    }
  }
};
/* ===========================================================================
 * Send a literal or distance tree in compressed form, using the codes in
 * bl_tree.
 */


const send_tree = (s, tree, max_code) => //    deflate_state *s;
//    ct_data *tree; /* the tree to be scanned */
//    int max_code;       /* and its largest code of non zero frequency */
{
  let n;
  /* iterates over all tree elements */

  let prevlen = -1;
  /* last emitted length */

  let curlen;
  /* length of current code */

  let nextlen = tree[0 * 2 + 1]
  /*.Len*/
  ;
  /* length of next code */

  let count = 0;
  /* repeat count of the current code */

  let max_count = 7;
  /* max repeat count */

  let min_count = 4;
  /* min repeat count */

  /* tree[max_code+1].Len = -1; */

  /* guard already set */

  if (nextlen === 0) {
    max_count = 138;
    min_count = 3;
  }

  for (n = 0; n <= max_code; n++) {
    curlen = nextlen;
    nextlen = tree[(n + 1) * 2 + 1]
    /*.Len*/
    ;

    if (++count < max_count && curlen === nextlen) {
      continue;
    } else if (count < min_count) {
      do {
        send_code(s, curlen, s.bl_tree);
      } while (--count !== 0);
    } else if (curlen !== 0) {
      if (curlen !== prevlen) {
        send_code(s, curlen, s.bl_tree);
        count--;
      } //Assert(count >= 3 && count <= 6, " 3_6?");


      send_code(s, REP_3_6, s.bl_tree);
      send_bits(s, count - 3, 2);
    } else if (count <= 10) {
      send_code(s, REPZ_3_10, s.bl_tree);
      send_bits(s, count - 3, 3);
    } else {
      send_code(s, REPZ_11_138, s.bl_tree);
      send_bits(s, count - 11, 7);
    }

    count = 0;
    prevlen = curlen;

    if (nextlen === 0) {
      max_count = 138;
      min_count = 3;
    } else if (curlen === nextlen) {
      max_count = 6;
      min_count = 3;
    } else {
      max_count = 7;
      min_count = 4;
    }
  }
};
/* ===========================================================================
 * Construct the Huffman tree for the bit lengths and return the index in
 * bl_order of the last bit length code to send.
 */


const build_bl_tree = s => {
  let max_blindex;
  /* index of last bit length code of non zero freq */

  /* Determine the bit length frequencies for literal and distance trees */

  scan_tree(s, s.dyn_ltree, s.l_desc.max_code);
  scan_tree(s, s.dyn_dtree, s.d_desc.max_code);
  /* Build the bit length tree: */

  build_tree(s, s.bl_desc);
  /* opt_len now includes the length of the tree representations, except
   * the lengths of the bit lengths codes and the 5+5+4 bits for the counts.
   */

  /* Determine the number of bit length codes to send. The pkzip format
   * requires that at least 4 bit length codes be sent. (appnote.txt says
   * 3 but the actual value used is 4.)
   */

  for (max_blindex = BL_CODES$1 - 1; max_blindex >= 3; max_blindex--) {
    if (s.bl_tree[bl_order[max_blindex] * 2 + 1]
    /*.Len*/
    !== 0) {
      break;
    }
  }
  /* Update opt_len to include the bit length tree and counts */


  s.opt_len += 3 * (max_blindex + 1) + 5 + 5 + 4; //Tracev((stderr, "\ndyn trees: dyn %ld, stat %ld",
  //        s->opt_len, s->static_len));

  return max_blindex;
};
/* ===========================================================================
 * Send the header for a block using dynamic Huffman trees: the counts, the
 * lengths of the bit length codes, the literal tree and the distance tree.
 * IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
 */


const send_all_trees = (s, lcodes, dcodes, blcodes) => //    deflate_state *s;
//    int lcodes, dcodes, blcodes; /* number of codes for each tree */
{
  let rank;
  /* index in bl_order */
  //Assert (lcodes >= 257 && dcodes >= 1 && blcodes >= 4, "not enough codes");
  //Assert (lcodes <= L_CODES && dcodes <= D_CODES && blcodes <= BL_CODES,
  //        "too many codes");
  //Tracev((stderr, "\nbl counts: "));

  send_bits(s, lcodes - 257, 5);
  /* not +255 as stated in appnote.txt */

  send_bits(s, dcodes - 1, 5);
  send_bits(s, blcodes - 4, 4);
  /* not -3 as stated in appnote.txt */

  for (rank = 0; rank < blcodes; rank++) {
    //Tracev((stderr, "\nbl code %2d ", bl_order[rank]));
    send_bits(s, s.bl_tree[bl_order[rank] * 2 + 1]
    /*.Len*/
    , 3);
  } //Tracev((stderr, "\nbl tree: sent %ld", s->bits_sent));


  send_tree(s, s.dyn_ltree, lcodes - 1);
  /* literal tree */
  //Tracev((stderr, "\nlit tree: sent %ld", s->bits_sent));

  send_tree(s, s.dyn_dtree, dcodes - 1);
  /* distance tree */
  //Tracev((stderr, "\ndist tree: sent %ld", s->bits_sent));
};
/* ===========================================================================
 * Check if the data type is TEXT or BINARY, using the following algorithm:
 * - TEXT if the two conditions below are satisfied:
 *    a) There are no non-portable control characters belonging to the
 *       "black list" (0..6, 14..25, 28..31).
 *    b) There is at least one printable character belonging to the
 *       "white list" (9 {TAB}, 10 {LF}, 13 {CR}, 32..255).
 * - BINARY otherwise.
 * - The following partially-portable control characters form a
 *   "gray list" that is ignored in this detection algorithm:
 *   (7 {BEL}, 8 {BS}, 11 {VT}, 12 {FF}, 26 {SUB}, 27 {ESC}).
 * IN assertion: the fields Freq of dyn_ltree are set.
 */


const detect_data_type = s => {
  /* black_mask is the bit mask of black-listed bytes
   * set bits 0..6, 14..25, and 28..31
   * 0xf3ffc07f = binary 11110011111111111100000001111111
   */
  let black_mask = 0xf3ffc07f;
  let n;
  /* Check for non-textual ("black-listed") bytes. */

  for (n = 0; n <= 31; n++, black_mask >>>= 1) {
    if (black_mask & 1 && s.dyn_ltree[n * 2]
    /*.Freq*/
    !== 0) {
      return Z_BINARY;
    }
  }
  /* Check for textual ("white-listed") bytes. */


  if (s.dyn_ltree[9 * 2]
  /*.Freq*/
  !== 0 || s.dyn_ltree[10 * 2]
  /*.Freq*/
  !== 0 || s.dyn_ltree[13 * 2]
  /*.Freq*/
  !== 0) {
    return Z_TEXT;
  }

  for (n = 32; n < LITERALS$1; n++) {
    if (s.dyn_ltree[n * 2]
    /*.Freq*/
    !== 0) {
      return Z_TEXT;
    }
  }
  /* There are no "black-listed" or "white-listed" bytes:
   * this stream either is empty or has tolerated ("gray-listed") bytes only.
   */


  return Z_BINARY;
};

let static_init_done = false;
/* ===========================================================================
 * Initialize the tree data structures for a new zlib stream.
 */

const _tr_init$1 = s => {
  if (!static_init_done) {
    tr_static_init();
    static_init_done = true;
  }

  s.l_desc = new TreeDesc(s.dyn_ltree, static_l_desc);
  s.d_desc = new TreeDesc(s.dyn_dtree, static_d_desc);
  s.bl_desc = new TreeDesc(s.bl_tree, static_bl_desc);
  s.bi_buf = 0;
  s.bi_valid = 0;
  /* Initialize the first block of the first file: */

  init_block(s);
};
/* ===========================================================================
 * Send a stored block
 */


const _tr_stored_block$1 = (s, buf, stored_len, last) => //DeflateState *s;
//charf *buf;       /* input block */
//ulg stored_len;   /* length of input block */
//int last;         /* one if this is the last block for a file */
{
  send_bits(s, (STORED_BLOCK << 1) + (last ? 1 : 0), 3);
  /* send block type */

  copy_block(s, buf, stored_len, true);
  /* with header */
};
/* ===========================================================================
 * Send one empty static block to give enough lookahead for inflate.
 * This takes 10 bits, of which 7 may remain in the bit buffer.
 */


const _tr_align$1 = s => {
  send_bits(s, STATIC_TREES << 1, 3);
  send_code(s, END_BLOCK, static_ltree);
  bi_flush(s);
};
/* ===========================================================================
 * Determine the best encoding for the current block: dynamic trees, static
 * trees or store, and output the encoded block to the zip file.
 */


const _tr_flush_block$1 = (s, buf, stored_len, last) => //DeflateState *s;
//charf *buf;       /* input block, or NULL if too old */
//ulg stored_len;   /* length of input block */
//int last;         /* one if this is the last block for a file */
{
  let opt_lenb, static_lenb;
  /* opt_len and static_len in bytes */

  let max_blindex = 0;
  /* index of last bit length code of non zero freq */

  /* Build the Huffman trees unless a stored block is forced */

  if (s.level > 0) {
    /* Check if the file is binary or text */
    if (s.strm.data_type === Z_UNKNOWN$1) {
      s.strm.data_type = detect_data_type(s);
    }
    /* Construct the literal and distance trees */


    build_tree(s, s.l_desc); // Tracev((stderr, "\nlit data: dyn %ld, stat %ld", s->opt_len,
    //        s->static_len));

    build_tree(s, s.d_desc); // Tracev((stderr, "\ndist data: dyn %ld, stat %ld", s->opt_len,
    //        s->static_len));

    /* At this point, opt_len and static_len are the total bit lengths of
     * the compressed block data, excluding the tree representations.
     */

    /* Build the bit length tree for the above two trees, and get the index
     * in bl_order of the last bit length code to send.
     */

    max_blindex = build_bl_tree(s);
    /* Determine the best encoding. Compute the block lengths in bytes. */

    opt_lenb = s.opt_len + 3 + 7 >>> 3;
    static_lenb = s.static_len + 3 + 7 >>> 3; // Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
    //        opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
    //        s->last_lit));

    if (static_lenb <= opt_lenb) {
      opt_lenb = static_lenb;
    }
  } else {
    // Assert(buf != (char*)0, "lost buf");
    opt_lenb = static_lenb = stored_len + 5;
    /* force a stored block */
  }

  if (stored_len + 4 <= opt_lenb && buf !== -1) {
    /* 4: two words for the lengths */

    /* The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE.
     * Otherwise we can't have processed more than WSIZE input bytes since
     * the last block flush, because compression would have been
     * successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
     * transform a block into a stored block.
     */
    _tr_stored_block$1(s, buf, stored_len, last);
  } else if (s.strategy === Z_FIXED$1 || static_lenb === opt_lenb) {
    send_bits(s, (STATIC_TREES << 1) + (last ? 1 : 0), 3);
    compress_block(s, static_ltree, static_dtree);
  } else {
    send_bits(s, (DYN_TREES << 1) + (last ? 1 : 0), 3);
    send_all_trees(s, s.l_desc.max_code + 1, s.d_desc.max_code + 1, max_blindex + 1);
    compress_block(s, s.dyn_ltree, s.dyn_dtree);
  } // Assert (s->compressed_len == s->bits_sent, "bad compressed size");

  /* The above check is made mod 2^32, for files larger than 512 MB
   * and uLong implemented on 32 bits.
   */


  init_block(s);

  if (last) {
    bi_windup(s);
  } // Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
  //       s->compressed_len-7*last));

};
/* ===========================================================================
 * Save the match info and tally the frequency counts. Return true if
 * the current block must be flushed.
 */


const _tr_tally$1 = (s, dist, lc) => //    deflate_state *s;
//    unsigned dist;  /* distance of matched string */
//    unsigned lc;    /* match length-MIN_MATCH or unmatched char (if dist==0) */
{
  //let out_length, in_length, dcode;
  s.pending_buf[s.d_buf + s.last_lit * 2] = dist >>> 8 & 0xff;
  s.pending_buf[s.d_buf + s.last_lit * 2 + 1] = dist & 0xff;
  s.pending_buf[s.l_buf + s.last_lit] = lc & 0xff;
  s.last_lit++;

  if (dist === 0) {
    /* lc is the unmatched char */
    s.dyn_ltree[lc * 2] /*.Freq*/++;
  } else {
    s.matches++;
    /* Here, lc is the match length - MIN_MATCH */

    dist--;
    /* dist = match distance - 1 */
    //Assert((ush)dist < (ush)MAX_DIST(s) &&
    //       (ush)lc <= (ush)(MAX_MATCH-MIN_MATCH) &&
    //       (ush)d_code(dist) < (ush)D_CODES,  "_tr_tally: bad match");

    s.dyn_ltree[(_length_code[lc] + LITERALS$1 + 1) * 2] /*.Freq*/++;
    s.dyn_dtree[d_code(dist) * 2] /*.Freq*/++;
  } // (!) This block is disabled in zlib defaults,
  // don't enable it for binary compatibility
  //#ifdef TRUNCATE_BLOCK
  //  /* Try to guess if it is profitable to stop the current block here */
  //  if ((s.last_lit & 0x1fff) === 0 && s.level > 2) {
  //    /* Compute an upper bound for the compressed length */
  //    out_length = s.last_lit*8;
  //    in_length = s.strstart - s.block_start;
  //
  //    for (dcode = 0; dcode < D_CODES; dcode++) {
  //      out_length += s.dyn_dtree[dcode*2]/*.Freq*/ * (5 + extra_dbits[dcode]);
  //    }
  //    out_length >>>= 3;
  //    //Tracev((stderr,"\nlast_lit %u, in %ld, out ~%ld(%ld%%) ",
  //    //       s->last_lit, in_length, out_length,
  //    //       100L - out_length*100L/in_length));
  //    if (s.matches < (s.last_lit>>1)/*int /2*/ && out_length < (in_length>>1)/*int /2*/) {
  //      return true;
  //    }
  //  }
  //#endif


  return s.last_lit === s.lit_bufsize - 1;
  /* We avoid equality with lit_bufsize because of wraparound at 64K
   * on 16 bit machines and because stored blocks are restricted to
   * 64K-1 bytes.
   */
};

var _tr_init_1 = _tr_init$1;
var _tr_stored_block_1 = _tr_stored_block$1;
var _tr_flush_block_1 = _tr_flush_block$1;
var _tr_tally_1 = _tr_tally$1;
var _tr_align_1 = _tr_align$1;
var trees = {
  _tr_init: _tr_init_1,
  _tr_stored_block: _tr_stored_block_1,
  _tr_flush_block: _tr_flush_block_1,
  _tr_tally: _tr_tally_1,
  _tr_align: _tr_align_1
}; // Note: adler32 takes 12% for level 0 and 2% for level 6.
// It isn't worth it to make additional optimizations as in original.
// Small size is preferable.
// (C) 1995-2013 Jean-loup Gailly and Mark Adler
// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//   claim that you wrote the original software. If you use this software
//   in a product, an acknowledgment in the product documentation would be
//   appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//   misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.

const adler32 = (adler, buf, len, pos) => {
  let s1 = adler & 0xffff | 0,
      s2 = adler >>> 16 & 0xffff | 0,
      n = 0;

  while (len !== 0) {
    // Set limit ~ twice less than 5552, to keep
    // s2 in 31-bits, because we force signed ints.
    // in other case %= will fail.
    n = len > 2000 ? 2000 : len;
    len -= n;

    do {
      s1 = s1 + buf[pos++] | 0;
      s2 = s2 + s1 | 0;
    } while (--n);

    s1 %= 65521;
    s2 %= 65521;
  }

  return s1 | s2 << 16 | 0;
};

var adler32_1 = adler32; // Note: we can't get significant speed boost here.
// So write code to minimize size - no pregenerated tables
// and array tools dependencies.
// (C) 1995-2013 Jean-loup Gailly and Mark Adler
// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//   claim that you wrote the original software. If you use this software
//   in a product, an acknowledgment in the product documentation would be
//   appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//   misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.
// Use ordinary array, since untyped makes no boost here

const makeTable = () => {
  let c,
      table = [];

  for (var n = 0; n < 256; n++) {
    c = n;

    for (var k = 0; k < 8; k++) {
      c = c & 1 ? 0xEDB88320 ^ c >>> 1 : c >>> 1;
    }

    table[n] = c;
  }

  return table;
}; // Create table on load. Just 255 signed longs. Not a problem.


const crcTable = new Uint32Array(makeTable());

const crc32 = (crc, buf, len, pos) => {
  const t = crcTable;
  const end = pos + len;
  crc ^= -1;

  for (let i = pos; i < end; i++) {
    crc = crc >>> 8 ^ t[(crc ^ buf[i]) & 0xFF];
  }

  return crc ^ -1; // >>> 0;
};

var crc32_1 = crc32; // (C) 1995-2013 Jean-loup Gailly and Mark Adler
// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//   claim that you wrote the original software. If you use this software
//   in a product, an acknowledgment in the product documentation would be
//   appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//   misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.

var messages = {
  2: 'need dictionary',

  /* Z_NEED_DICT       2  */
  1: 'stream end',

  /* Z_STREAM_END      1  */
  0: '',

  /* Z_OK              0  */
  '-1': 'file error',

  /* Z_ERRNO         (-1) */
  '-2': 'stream error',

  /* Z_STREAM_ERROR  (-2) */
  '-3': 'data error',

  /* Z_DATA_ERROR    (-3) */
  '-4': 'insufficient memory',

  /* Z_MEM_ERROR     (-4) */
  '-5': 'buffer error',

  /* Z_BUF_ERROR     (-5) */
  '-6': 'incompatible version'
  /* Z_VERSION_ERROR (-6) */

}; // (C) 1995-2013 Jean-loup Gailly and Mark Adler
// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//   claim that you wrote the original software. If you use this software
//   in a product, an acknowledgment in the product documentation would be
//   appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//   misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.

var constants$2 = {
  /* Allowed flush values; see deflate() and inflate() below for details */
  Z_NO_FLUSH: 0,
  Z_PARTIAL_FLUSH: 1,
  Z_SYNC_FLUSH: 2,
  Z_FULL_FLUSH: 3,
  Z_FINISH: 4,
  Z_BLOCK: 5,
  Z_TREES: 6,

  /* Return codes for the compression/decompression functions. Negative values
  * are errors, positive values are used for special but normal events.
  */
  Z_OK: 0,
  Z_STREAM_END: 1,
  Z_NEED_DICT: 2,
  Z_ERRNO: -1,
  Z_STREAM_ERROR: -2,
  Z_DATA_ERROR: -3,
  Z_MEM_ERROR: -4,
  Z_BUF_ERROR: -5,
  //Z_VERSION_ERROR: -6,

  /* compression levels */
  Z_NO_COMPRESSION: 0,
  Z_BEST_SPEED: 1,
  Z_BEST_COMPRESSION: 9,
  Z_DEFAULT_COMPRESSION: -1,
  Z_FILTERED: 1,
  Z_HUFFMAN_ONLY: 2,
  Z_RLE: 3,
  Z_FIXED: 4,
  Z_DEFAULT_STRATEGY: 0,

  /* Possible values of the data_type field (though see inflate()) */
  Z_BINARY: 0,
  Z_TEXT: 1,
  //Z_ASCII:                1, // = Z_TEXT (deprecated)
  Z_UNKNOWN: 2,

  /* The deflate compression method */
  Z_DEFLATED: 8 //Z_NULL:                 null // Use -1 or null inline, depending on var type

}; // (C) 1995-2013 Jean-loup Gailly and Mark Adler
// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//   claim that you wrote the original software. If you use this software
//   in a product, an acknowledgment in the product documentation would be
//   appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//   misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.

const {
  _tr_init,
  _tr_stored_block,
  _tr_flush_block,
  _tr_tally,
  _tr_align
} = trees;
/* Public constants ==========================================================*/

/* ===========================================================================*/

const {
  Z_NO_FLUSH: Z_NO_FLUSH$2,
  Z_PARTIAL_FLUSH,
  Z_FULL_FLUSH: Z_FULL_FLUSH$1,
  Z_FINISH: Z_FINISH$3,
  Z_BLOCK: Z_BLOCK$1,
  Z_OK: Z_OK$3,
  Z_STREAM_END: Z_STREAM_END$3,
  Z_STREAM_ERROR: Z_STREAM_ERROR$2,
  Z_DATA_ERROR: Z_DATA_ERROR$2,
  Z_BUF_ERROR: Z_BUF_ERROR$1,
  Z_DEFAULT_COMPRESSION: Z_DEFAULT_COMPRESSION$1,
  Z_FILTERED,
  Z_HUFFMAN_ONLY,
  Z_RLE,
  Z_FIXED,
  Z_DEFAULT_STRATEGY: Z_DEFAULT_STRATEGY$1,
  Z_UNKNOWN,
  Z_DEFLATED: Z_DEFLATED$2
} = constants$2;
/*============================================================================*/

const MAX_MEM_LEVEL = 9;
/* Maximum value for memLevel in deflateInit2 */

const MAX_WBITS$1 = 15;
/* 32K LZ77 window */

const DEF_MEM_LEVEL = 8;
const LENGTH_CODES = 29;
/* number of length codes, not counting the special END_BLOCK code */

const LITERALS = 256;
/* number of literal bytes 0..255 */

const L_CODES = LITERALS + 1 + LENGTH_CODES;
/* number of Literal or Length codes, including the END_BLOCK code */

const D_CODES = 30;
/* number of distance codes */

const BL_CODES = 19;
/* number of codes used to transfer the bit lengths */

const HEAP_SIZE = 2 * L_CODES + 1;
/* maximum heap size */

const MAX_BITS = 15;
/* All codes must not exceed MAX_BITS bits */

const MIN_MATCH = 3;
const MAX_MATCH = 258;
const MIN_LOOKAHEAD = MAX_MATCH + MIN_MATCH + 1;
const PRESET_DICT = 0x20;
const INIT_STATE = 42;
const EXTRA_STATE = 69;
const NAME_STATE = 73;
const COMMENT_STATE = 91;
const HCRC_STATE = 103;
const BUSY_STATE = 113;
const FINISH_STATE = 666;
const BS_NEED_MORE = 1;
/* block not completed, need more input or more output */

const BS_BLOCK_DONE = 2;
/* block flush performed */

const BS_FINISH_STARTED = 3;
/* finish started, need only more output at next deflate */

const BS_FINISH_DONE = 4;
/* finish done, accept no more input or output */

const OS_CODE = 0x03; // Unix :) . Don't detect, use this default.

const err = (strm, errorCode) => {
  strm.msg = messages[errorCode];
  return errorCode;
};

const rank = f => {
  return (f << 1) - (f > 4 ? 9 : 0);
};

const zero = buf => {
  let len = buf.length;

  while (--len >= 0) {
    buf[len] = 0;
  }
};
/* eslint-disable new-cap */


let HASH_ZLIB = (s, prev, data) => (prev << s.hash_shift ^ data) & s.hash_mask; // This hash causes less collisions, https://github.com/nodeca/pako/issues/135
// But breaks binary compatibility
//let HASH_FAST = (s, prev, data) => ((prev << 8) + (prev >> 8) + (data << 4)) & s.hash_mask;


let HASH = HASH_ZLIB;
/* =========================================================================
 * Flush as much pending output as possible. All deflate() output goes
 * through this function so some applications may wish to modify it
 * to avoid allocating a large strm->output buffer and copying into it.
 * (See also read_buf()).
 */

const flush_pending = strm => {
  const s = strm.state; //_tr_flush_bits(s);

  let len = s.pending;

  if (len > strm.avail_out) {
    len = strm.avail_out;
  }

  if (len === 0) {
    return;
  }

  strm.output.set(s.pending_buf.subarray(s.pending_out, s.pending_out + len), strm.next_out);
  strm.next_out += len;
  s.pending_out += len;
  strm.total_out += len;
  strm.avail_out -= len;
  s.pending -= len;

  if (s.pending === 0) {
    s.pending_out = 0;
  }
};

const flush_block_only = (s, last) => {
  _tr_flush_block(s, s.block_start >= 0 ? s.block_start : -1, s.strstart - s.block_start, last);

  s.block_start = s.strstart;
  flush_pending(s.strm);
};

const put_byte = (s, b) => {
  s.pending_buf[s.pending++] = b;
};
/* =========================================================================
 * Put a short in the pending buffer. The 16-bit value is put in MSB order.
 * IN assertion: the stream state is correct and there is enough room in
 * pending_buf.
 */


const putShortMSB = (s, b) => {
  //  put_byte(s, (Byte)(b >> 8));
  //  put_byte(s, (Byte)(b & 0xff));
  s.pending_buf[s.pending++] = b >>> 8 & 0xff;
  s.pending_buf[s.pending++] = b & 0xff;
};
/* ===========================================================================
 * Read a new buffer from the current input stream, update the adler32
 * and total number of bytes read.  All deflate() input goes through
 * this function so some applications may wish to modify it to avoid
 * allocating a large strm->input buffer and copying from it.
 * (See also flush_pending()).
 */


const read_buf = (strm, buf, start, size) => {
  let len = strm.avail_in;

  if (len > size) {
    len = size;
  }

  if (len === 0) {
    return 0;
  }

  strm.avail_in -= len; // zmemcpy(buf, strm->next_in, len);

  buf.set(strm.input.subarray(strm.next_in, strm.next_in + len), start);

  if (strm.state.wrap === 1) {
    strm.adler = adler32_1(strm.adler, buf, len, start);
  } else if (strm.state.wrap === 2) {
    strm.adler = crc32_1(strm.adler, buf, len, start);
  }

  strm.next_in += len;
  strm.total_in += len;
  return len;
};
/* ===========================================================================
 * Set match_start to the longest match starting at the given string and
 * return its length. Matches shorter or equal to prev_length are discarded,
 * in which case the result is equal to prev_length and match_start is
 * garbage.
 * IN assertions: cur_match is the head of the hash chain for the current
 *   string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
 * OUT assertion: the match length is not greater than s->lookahead.
 */


const longest_match = (s, cur_match) => {
  let chain_length = s.max_chain_length;
  /* max hash chain length */

  let scan = s.strstart;
  /* current string */

  let match;
  /* matched string */

  let len;
  /* length of current match */

  let best_len = s.prev_length;
  /* best match length so far */

  let nice_match = s.nice_match;
  /* stop if match long enough */

  const limit = s.strstart > s.w_size - MIN_LOOKAHEAD ? s.strstart - (s.w_size - MIN_LOOKAHEAD) : 0
  /*NIL*/
  ;
  const _win = s.window; // shortcut

  const wmask = s.w_mask;
  const prev = s.prev;
  /* Stop when cur_match becomes <= limit. To simplify the code,
   * we prevent matches with the string of window index 0.
   */

  const strend = s.strstart + MAX_MATCH;
  let scan_end1 = _win[scan + best_len - 1];
  let scan_end = _win[scan + best_len];
  /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
   * It is easy to get rid of this optimization if necessary.
   */
  // Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");

  /* Do not waste too much time if we already have a good match: */

  if (s.prev_length >= s.good_match) {
    chain_length >>= 2;
  }
  /* Do not look for matches beyond the end of the input. This is necessary
   * to make deflate deterministic.
   */


  if (nice_match > s.lookahead) {
    nice_match = s.lookahead;
  } // Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");


  do {
    // Assert(cur_match < s->strstart, "no future");
    match = cur_match;
    /* Skip to next match if the match length cannot increase
     * or if the match length is less than 2.  Note that the checks below
     * for insufficient lookahead only occur occasionally for performance
     * reasons.  Therefore uninitialized memory will be accessed, and
     * conditional jumps will be made that depend on those values.
     * However the length of the match is limited to the lookahead, so
     * the output of deflate is not affected by the uninitialized values.
     */

    if (_win[match + best_len] !== scan_end || _win[match + best_len - 1] !== scan_end1 || _win[match] !== _win[scan] || _win[++match] !== _win[scan + 1]) {
      continue;
    }
    /* The check at best_len-1 can be removed because it will be made
     * again later. (This heuristic is not always a win.)
     * It is not necessary to compare scan[2] and match[2] since they
     * are always equal when the other bytes match, given that
     * the hash keys are equal and that HASH_BITS >= 8.
     */


    scan += 2;
    match++; // Assert(*scan == *match, "match[2]?");

    /* We check for insufficient lookahead only every 8th comparison;
     * the 256th check will be made at strstart+258.
     */

    do {
      /*jshint noempty:false*/
    } while (_win[++scan] === _win[++match] && _win[++scan] === _win[++match] && _win[++scan] === _win[++match] && _win[++scan] === _win[++match] && _win[++scan] === _win[++match] && _win[++scan] === _win[++match] && _win[++scan] === _win[++match] && _win[++scan] === _win[++match] && scan < strend); // Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");


    len = MAX_MATCH - (strend - scan);
    scan = strend - MAX_MATCH;

    if (len > best_len) {
      s.match_start = cur_match;
      best_len = len;

      if (len >= nice_match) {
        break;
      }

      scan_end1 = _win[scan + best_len - 1];
      scan_end = _win[scan + best_len];
    }
  } while ((cur_match = prev[cur_match & wmask]) > limit && --chain_length !== 0);

  if (best_len <= s.lookahead) {
    return best_len;
  }

  return s.lookahead;
};
/* ===========================================================================
 * Fill the window when the lookahead becomes insufficient.
 * Updates strstart and lookahead.
 *
 * IN assertion: lookahead < MIN_LOOKAHEAD
 * OUT assertions: strstart <= window_size-MIN_LOOKAHEAD
 *    At least one byte has been read, or avail_in == 0; reads are
 *    performed for at least two bytes (required for the zip translate_eol
 *    option -- not supported here).
 */


const fill_window = s => {
  const _w_size = s.w_size;
  let p, n, m, more, str; //Assert(s->lookahead < MIN_LOOKAHEAD, "already enough lookahead");

  do {
    more = s.window_size - s.lookahead - s.strstart; // JS ints have 32 bit, block below not needed

    /* Deal with !@#$% 64K limit: */
    //if (sizeof(int) <= 2) {
    //    if (more == 0 && s->strstart == 0 && s->lookahead == 0) {
    //        more = wsize;
    //
    //  } else if (more == (unsigned)(-1)) {
    //        /* Very unlikely, but possible on 16 bit machine if
    //         * strstart == 0 && lookahead == 1 (input done a byte at time)
    //         */
    //        more--;
    //    }
    //}

    /* If the window is almost full and there is insufficient lookahead,
     * move the upper half to the lower one to make room in the upper half.
     */

    if (s.strstart >= _w_size + (_w_size - MIN_LOOKAHEAD)) {
      s.window.set(s.window.subarray(_w_size, _w_size + _w_size), 0);
      s.match_start -= _w_size;
      s.strstart -= _w_size;
      /* we now have strstart >= MAX_DIST */

      s.block_start -= _w_size;
      /* Slide the hash table (could be avoided with 32 bit values
       at the expense of memory usage). We slide even when level == 0
       to keep the hash table consistent if we switch back to level > 0
       later. (Using level 0 permanently is not an optimal usage of
       zlib, so we don't care about this pathological case.)
       */

      n = s.hash_size;
      p = n;

      do {
        m = s.head[--p];
        s.head[p] = m >= _w_size ? m - _w_size : 0;
      } while (--n);

      n = _w_size;
      p = n;

      do {
        m = s.prev[--p];
        s.prev[p] = m >= _w_size ? m - _w_size : 0;
        /* If n is not on any hash chain, prev[n] is garbage but
         * its value will never be used.
         */
      } while (--n);

      more += _w_size;
    }

    if (s.strm.avail_in === 0) {
      break;
    }
    /* If there was no sliding:
     *    strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&
     *    more == window_size - lookahead - strstart
     * => more >= window_size - (MIN_LOOKAHEAD-1 + WSIZE + MAX_DIST-1)
     * => more >= window_size - 2*WSIZE + 2
     * In the BIG_MEM or MMAP case (not yet supported),
     *   window_size == input_size + MIN_LOOKAHEAD  &&
     *   strstart + s->lookahead <= input_size => more >= MIN_LOOKAHEAD.
     * Otherwise, window_size == 2*WSIZE so more >= 2.
     * If there was sliding, more >= WSIZE. So in all cases, more >= 2.
     */
    //Assert(more >= 2, "more < 2");


    n = read_buf(s.strm, s.window, s.strstart + s.lookahead, more);
    s.lookahead += n;
    /* Initialize the hash value now that we have some input: */

    if (s.lookahead + s.insert >= MIN_MATCH) {
      str = s.strstart - s.insert;
      s.ins_h = s.window[str];
      /* UPDATE_HASH(s, s->ins_h, s->window[str + 1]); */

      s.ins_h = HASH(s, s.ins_h, s.window[str + 1]); //#if MIN_MATCH != 3
      //        Call update_hash() MIN_MATCH-3 more times
      //#endif

      while (s.insert) {
        /* UPDATE_HASH(s, s->ins_h, s->window[str + MIN_MATCH-1]); */
        s.ins_h = HASH(s, s.ins_h, s.window[str + MIN_MATCH - 1]);
        s.prev[str & s.w_mask] = s.head[s.ins_h];
        s.head[s.ins_h] = str;
        str++;
        s.insert--;

        if (s.lookahead + s.insert < MIN_MATCH) {
          break;
        }
      }
    }
    /* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,
     * but this is not important since only literal bytes will be emitted.
     */

  } while (s.lookahead < MIN_LOOKAHEAD && s.strm.avail_in !== 0);
  /* If the WIN_INIT bytes after the end of the current data have never been
   * written, then zero those bytes in order to avoid memory check reports of
   * the use of uninitialized (or uninitialised as Julian writes) bytes by
   * the longest match routines.  Update the high water mark for the next
   * time through here.  WIN_INIT is set to MAX_MATCH since the longest match
   * routines allow scanning to strstart + MAX_MATCH, ignoring lookahead.
   */
  //  if (s.high_water < s.window_size) {
  //    const curr = s.strstart + s.lookahead;
  //    let init = 0;
  //
  //    if (s.high_water < curr) {
  //      /* Previous high water mark below current data -- zero WIN_INIT
  //       * bytes or up to end of window, whichever is less.
  //       */
  //      init = s.window_size - curr;
  //      if (init > WIN_INIT)
  //        init = WIN_INIT;
  //      zmemzero(s->window + curr, (unsigned)init);
  //      s->high_water = curr + init;
  //    }
  //    else if (s->high_water < (ulg)curr + WIN_INIT) {
  //      /* High water mark at or above current data, but below current data
  //       * plus WIN_INIT -- zero out to current data plus WIN_INIT, or up
  //       * to end of window, whichever is less.
  //       */
  //      init = (ulg)curr + WIN_INIT - s->high_water;
  //      if (init > s->window_size - s->high_water)
  //        init = s->window_size - s->high_water;
  //      zmemzero(s->window + s->high_water, (unsigned)init);
  //      s->high_water += init;
  //    }
  //  }
  //
  //  Assert((ulg)s->strstart <= s->window_size - MIN_LOOKAHEAD,
  //    "not enough room for search");

};
/* ===========================================================================
 * Copy without compression as much as possible from the input stream, return
 * the current block state.
 * This function does not insert new strings in the dictionary since
 * uncompressible data is probably not useful. This function is used
 * only for the level=0 compression option.
 * NOTE: this function should be optimized to avoid extra copying from
 * window to pending_buf.
 */


const deflate_stored = (s, flush) => {
  /* Stored blocks are limited to 0xffff bytes, pending_buf is limited
   * to pending_buf_size, and each stored block has a 5 byte header:
   */
  let max_block_size = 0xffff;

  if (max_block_size > s.pending_buf_size - 5) {
    max_block_size = s.pending_buf_size - 5;
  }
  /* Copy as much as possible from input to output: */


  for (;;) {
    /* Fill the window as much as possible: */
    if (s.lookahead <= 1) {
      //Assert(s->strstart < s->w_size+MAX_DIST(s) ||
      //  s->block_start >= (long)s->w_size, "slide too late");
      //      if (!(s.strstart < s.w_size + (s.w_size - MIN_LOOKAHEAD) ||
      //        s.block_start >= s.w_size)) {
      //        throw  new Error("slide too late");
      //      }
      fill_window(s);

      if (s.lookahead === 0 && flush === Z_NO_FLUSH$2) {
        return BS_NEED_MORE;
      }

      if (s.lookahead === 0) {
        break;
      }
      /* flush the current block */

    } //Assert(s->block_start >= 0L, "block gone");
    //    if (s.block_start < 0) throw new Error("block gone");


    s.strstart += s.lookahead;
    s.lookahead = 0;
    /* Emit a stored block if pending_buf will be full: */

    const max_start = s.block_start + max_block_size;

    if (s.strstart === 0 || s.strstart >= max_start) {
      /* strstart == 0 is possible when wraparound on 16-bit machine */
      s.lookahead = s.strstart - max_start;
      s.strstart = max_start;
      /*** FLUSH_BLOCK(s, 0); ***/

      flush_block_only(s, false);

      if (s.strm.avail_out === 0) {
        return BS_NEED_MORE;
      }
      /***/

    }
    /* Flush if we may have to slide, otherwise block_start may become
     * negative and the data will be gone:
     */


    if (s.strstart - s.block_start >= s.w_size - MIN_LOOKAHEAD) {
      /*** FLUSH_BLOCK(s, 0); ***/
      flush_block_only(s, false);

      if (s.strm.avail_out === 0) {
        return BS_NEED_MORE;
      }
      /***/

    }
  }

  s.insert = 0;

  if (flush === Z_FINISH$3) {
    /*** FLUSH_BLOCK(s, 1); ***/
    flush_block_only(s, true);

    if (s.strm.avail_out === 0) {
      return BS_FINISH_STARTED;
    }
    /***/


    return BS_FINISH_DONE;
  }

  if (s.strstart > s.block_start) {
    /*** FLUSH_BLOCK(s, 0); ***/
    flush_block_only(s, false);

    if (s.strm.avail_out === 0) {
      return BS_NEED_MORE;
    }
    /***/

  }

  return BS_NEED_MORE;
};
/* ===========================================================================
 * Compress as much as possible from the input stream, return the current
 * block state.
 * This function does not perform lazy evaluation of matches and inserts
 * new strings in the dictionary only for unmatched strings or for short
 * matches. It is used only for the fast compression options.
 */


const deflate_fast = (s, flush) => {
  let hash_head;
  /* head of the hash chain */

  let bflush;
  /* set if current block must be flushed */

  for (;;) {
    /* Make sure that we always have enough lookahead, except
     * at the end of the input file. We need MAX_MATCH bytes
     * for the next match, plus MIN_MATCH bytes to insert the
     * string following the next match.
     */
    if (s.lookahead < MIN_LOOKAHEAD) {
      fill_window(s);

      if (s.lookahead < MIN_LOOKAHEAD && flush === Z_NO_FLUSH$2) {
        return BS_NEED_MORE;
      }

      if (s.lookahead === 0) {
        break;
        /* flush the current block */
      }
    }
    /* Insert the string window[strstart .. strstart+2] in the
     * dictionary, and set hash_head to the head of the hash chain:
     */


    hash_head = 0
    /*NIL*/
    ;

    if (s.lookahead >= MIN_MATCH) {
      /*** INSERT_STRING(s, s.strstart, hash_head); ***/
      s.ins_h = HASH(s, s.ins_h, s.window[s.strstart + MIN_MATCH - 1]);
      hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];
      s.head[s.ins_h] = s.strstart;
      /***/
    }
    /* Find the longest match, discarding those <= prev_length.
     * At this point we have always match_length < MIN_MATCH
     */


    if (hash_head !== 0
    /*NIL*/
    && s.strstart - hash_head <= s.w_size - MIN_LOOKAHEAD) {
      /* To simplify the code, we prevent matches with the string
       * of window index 0 (in particular we have to avoid a match
       * of the string with itself at the start of the input file).
       */
      s.match_length = longest_match(s, hash_head);
      /* longest_match() sets match_start */
    }

    if (s.match_length >= MIN_MATCH) {
      // check_match(s, s.strstart, s.match_start, s.match_length); // for debug only

      /*** _tr_tally_dist(s, s.strstart - s.match_start,
                     s.match_length - MIN_MATCH, bflush); ***/
      bflush = _tr_tally(s, s.strstart - s.match_start, s.match_length - MIN_MATCH);
      s.lookahead -= s.match_length;
      /* Insert new strings in the hash table only if the match length
       * is not too large. This saves time but degrades compression.
       */

      if (s.match_length <= s.max_lazy_match
      /*max_insert_length*/
      && s.lookahead >= MIN_MATCH) {
        s.match_length--;
        /* string at strstart already in table */

        do {
          s.strstart++;
          /*** INSERT_STRING(s, s.strstart, hash_head); ***/

          s.ins_h = HASH(s, s.ins_h, s.window[s.strstart + MIN_MATCH - 1]);
          hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];
          s.head[s.ins_h] = s.strstart;
          /***/

          /* strstart never exceeds WSIZE-MAX_MATCH, so there are
           * always MIN_MATCH bytes ahead.
           */
        } while (--s.match_length !== 0);

        s.strstart++;
      } else {
        s.strstart += s.match_length;
        s.match_length = 0;
        s.ins_h = s.window[s.strstart];
        /* UPDATE_HASH(s, s.ins_h, s.window[s.strstart+1]); */

        s.ins_h = HASH(s, s.ins_h, s.window[s.strstart + 1]); //#if MIN_MATCH != 3
        //                Call UPDATE_HASH() MIN_MATCH-3 more times
        //#endif

        /* If lookahead < MIN_MATCH, ins_h is garbage, but it does not
         * matter since it will be recomputed at next deflate call.
         */
      }
    } else {
      /* No match, output a literal byte */
      //Tracevv((stderr,"%c", s.window[s.strstart]));

      /*** _tr_tally_lit(s, s.window[s.strstart], bflush); ***/
      bflush = _tr_tally(s, 0, s.window[s.strstart]);
      s.lookahead--;
      s.strstart++;
    }

    if (bflush) {
      /*** FLUSH_BLOCK(s, 0); ***/
      flush_block_only(s, false);

      if (s.strm.avail_out === 0) {
        return BS_NEED_MORE;
      }
      /***/

    }
  }

  s.insert = s.strstart < MIN_MATCH - 1 ? s.strstart : MIN_MATCH - 1;

  if (flush === Z_FINISH$3) {
    /*** FLUSH_BLOCK(s, 1); ***/
    flush_block_only(s, true);

    if (s.strm.avail_out === 0) {
      return BS_FINISH_STARTED;
    }
    /***/


    return BS_FINISH_DONE;
  }

  if (s.last_lit) {
    /*** FLUSH_BLOCK(s, 0); ***/
    flush_block_only(s, false);

    if (s.strm.avail_out === 0) {
      return BS_NEED_MORE;
    }
    /***/

  }

  return BS_BLOCK_DONE;
};
/* ===========================================================================
 * Same as above, but achieves better compression. We use a lazy
 * evaluation for matches: a match is finally adopted only if there is
 * no better match at the next window position.
 */


const deflate_slow = (s, flush) => {
  let hash_head;
  /* head of hash chain */

  let bflush;
  /* set if current block must be flushed */

  let max_insert;
  /* Process the input block. */

  for (;;) {
    /* Make sure that we always have enough lookahead, except
     * at the end of the input file. We need MAX_MATCH bytes
     * for the next match, plus MIN_MATCH bytes to insert the
     * string following the next match.
     */
    if (s.lookahead < MIN_LOOKAHEAD) {
      fill_window(s);

      if (s.lookahead < MIN_LOOKAHEAD && flush === Z_NO_FLUSH$2) {
        return BS_NEED_MORE;
      }

      if (s.lookahead === 0) {
        break;
      }
      /* flush the current block */

    }
    /* Insert the string window[strstart .. strstart+2] in the
     * dictionary, and set hash_head to the head of the hash chain:
     */


    hash_head = 0
    /*NIL*/
    ;

    if (s.lookahead >= MIN_MATCH) {
      /*** INSERT_STRING(s, s.strstart, hash_head); ***/
      s.ins_h = HASH(s, s.ins_h, s.window[s.strstart + MIN_MATCH - 1]);
      hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];
      s.head[s.ins_h] = s.strstart;
      /***/
    }
    /* Find the longest match, discarding those <= prev_length.
     */


    s.prev_length = s.match_length;
    s.prev_match = s.match_start;
    s.match_length = MIN_MATCH - 1;

    if (hash_head !== 0
    /*NIL*/
    && s.prev_length < s.max_lazy_match && s.strstart - hash_head <= s.w_size - MIN_LOOKAHEAD
    /*MAX_DIST(s)*/
    ) {
      /* To simplify the code, we prevent matches with the string
       * of window index 0 (in particular we have to avoid a match
       * of the string with itself at the start of the input file).
       */
      s.match_length = longest_match(s, hash_head);
      /* longest_match() sets match_start */

      if (s.match_length <= 5 && (s.strategy === Z_FILTERED || s.match_length === MIN_MATCH && s.strstart - s.match_start > 4096
      /*TOO_FAR*/
      )) {
        /* If prev_match is also MIN_MATCH, match_start is garbage
         * but we will ignore the current match anyway.
         */
        s.match_length = MIN_MATCH - 1;
      }
    }
    /* If there was a match at the previous step and the current
     * match is not better, output the previous match:
     */


    if (s.prev_length >= MIN_MATCH && s.match_length <= s.prev_length) {
      max_insert = s.strstart + s.lookahead - MIN_MATCH;
      /* Do not insert strings in hash table beyond this. */
      //check_match(s, s.strstart-1, s.prev_match, s.prev_length);

      /***_tr_tally_dist(s, s.strstart - 1 - s.prev_match,
                     s.prev_length - MIN_MATCH, bflush);***/

      bflush = _tr_tally(s, s.strstart - 1 - s.prev_match, s.prev_length - MIN_MATCH);
      /* Insert in hash table all strings up to the end of the match.
       * strstart-1 and strstart are already inserted. If there is not
       * enough lookahead, the last two strings are not inserted in
       * the hash table.
       */

      s.lookahead -= s.prev_length - 1;
      s.prev_length -= 2;

      do {
        if (++s.strstart <= max_insert) {
          /*** INSERT_STRING(s, s.strstart, hash_head); ***/
          s.ins_h = HASH(s, s.ins_h, s.window[s.strstart + MIN_MATCH - 1]);
          hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];
          s.head[s.ins_h] = s.strstart;
          /***/
        }
      } while (--s.prev_length !== 0);

      s.match_available = 0;
      s.match_length = MIN_MATCH - 1;
      s.strstart++;

      if (bflush) {
        /*** FLUSH_BLOCK(s, 0); ***/
        flush_block_only(s, false);

        if (s.strm.avail_out === 0) {
          return BS_NEED_MORE;
        }
        /***/

      }
    } else if (s.match_available) {
      /* If there was no match at the previous position, output a
       * single literal. If there was a match but the current match
       * is longer, truncate the previous match to a single literal.
       */
      //Tracevv((stderr,"%c", s->window[s->strstart-1]));

      /*** _tr_tally_lit(s, s.window[s.strstart-1], bflush); ***/
      bflush = _tr_tally(s, 0, s.window[s.strstart - 1]);

      if (bflush) {
        /*** FLUSH_BLOCK_ONLY(s, 0) ***/
        flush_block_only(s, false);
        /***/
      }

      s.strstart++;
      s.lookahead--;

      if (s.strm.avail_out === 0) {
        return BS_NEED_MORE;
      }
    } else {
      /* There is no previous match to compare with, wait for
       * the next step to decide.
       */
      s.match_available = 1;
      s.strstart++;
      s.lookahead--;
    }
  } //Assert (flush != Z_NO_FLUSH, "no flush?");


  if (s.match_available) {
    //Tracevv((stderr,"%c", s->window[s->strstart-1]));

    /*** _tr_tally_lit(s, s.window[s.strstart-1], bflush); ***/
    bflush = _tr_tally(s, 0, s.window[s.strstart - 1]);
    s.match_available = 0;
  }

  s.insert = s.strstart < MIN_MATCH - 1 ? s.strstart : MIN_MATCH - 1;

  if (flush === Z_FINISH$3) {
    /*** FLUSH_BLOCK(s, 1); ***/
    flush_block_only(s, true);

    if (s.strm.avail_out === 0) {
      return BS_FINISH_STARTED;
    }
    /***/


    return BS_FINISH_DONE;
  }

  if (s.last_lit) {
    /*** FLUSH_BLOCK(s, 0); ***/
    flush_block_only(s, false);

    if (s.strm.avail_out === 0) {
      return BS_NEED_MORE;
    }
    /***/

  }

  return BS_BLOCK_DONE;
};
/* ===========================================================================
 * For Z_RLE, simply look for runs of bytes, generate matches only of distance
 * one.  Do not maintain a hash table.  (It will be regenerated if this run of
 * deflate switches away from Z_RLE.)
 */


const deflate_rle = (s, flush) => {
  let bflush;
  /* set if current block must be flushed */

  let prev;
  /* byte at distance one to match */

  let scan, strend;
  /* scan goes up to strend for length of run */

  const _win = s.window;

  for (;;) {
    /* Make sure that we always have enough lookahead, except
     * at the end of the input file. We need MAX_MATCH bytes
     * for the longest run, plus one for the unrolled loop.
     */
    if (s.lookahead <= MAX_MATCH) {
      fill_window(s);

      if (s.lookahead <= MAX_MATCH && flush === Z_NO_FLUSH$2) {
        return BS_NEED_MORE;
      }

      if (s.lookahead === 0) {
        break;
      }
      /* flush the current block */

    }
    /* See how many times the previous byte repeats */


    s.match_length = 0;

    if (s.lookahead >= MIN_MATCH && s.strstart > 0) {
      scan = s.strstart - 1;
      prev = _win[scan];

      if (prev === _win[++scan] && prev === _win[++scan] && prev === _win[++scan]) {
        strend = s.strstart + MAX_MATCH;

        do {
          /*jshint noempty:false*/
        } while (prev === _win[++scan] && prev === _win[++scan] && prev === _win[++scan] && prev === _win[++scan] && prev === _win[++scan] && prev === _win[++scan] && prev === _win[++scan] && prev === _win[++scan] && scan < strend);

        s.match_length = MAX_MATCH - (strend - scan);

        if (s.match_length > s.lookahead) {
          s.match_length = s.lookahead;
        }
      } //Assert(scan <= s->window+(uInt)(s->window_size-1), "wild scan");

    }
    /* Emit match if have run of MIN_MATCH or longer, else emit literal */


    if (s.match_length >= MIN_MATCH) {
      //check_match(s, s.strstart, s.strstart - 1, s.match_length);

      /*** _tr_tally_dist(s, 1, s.match_length - MIN_MATCH, bflush); ***/
      bflush = _tr_tally(s, 1, s.match_length - MIN_MATCH);
      s.lookahead -= s.match_length;
      s.strstart += s.match_length;
      s.match_length = 0;
    } else {
      /* No match, output a literal byte */
      //Tracevv((stderr,"%c", s->window[s->strstart]));

      /*** _tr_tally_lit(s, s.window[s.strstart], bflush); ***/
      bflush = _tr_tally(s, 0, s.window[s.strstart]);
      s.lookahead--;
      s.strstart++;
    }

    if (bflush) {
      /*** FLUSH_BLOCK(s, 0); ***/
      flush_block_only(s, false);

      if (s.strm.avail_out === 0) {
        return BS_NEED_MORE;
      }
      /***/

    }
  }

  s.insert = 0;

  if (flush === Z_FINISH$3) {
    /*** FLUSH_BLOCK(s, 1); ***/
    flush_block_only(s, true);

    if (s.strm.avail_out === 0) {
      return BS_FINISH_STARTED;
    }
    /***/


    return BS_FINISH_DONE;
  }

  if (s.last_lit) {
    /*** FLUSH_BLOCK(s, 0); ***/
    flush_block_only(s, false);

    if (s.strm.avail_out === 0) {
      return BS_NEED_MORE;
    }
    /***/

  }

  return BS_BLOCK_DONE;
};
/* ===========================================================================
 * For Z_HUFFMAN_ONLY, do not look for matches.  Do not maintain a hash table.
 * (It will be regenerated if this run of deflate switches away from Huffman.)
 */


const deflate_huff = (s, flush) => {
  let bflush;
  /* set if current block must be flushed */

  for (;;) {
    /* Make sure that we have a literal to write. */
    if (s.lookahead === 0) {
      fill_window(s);

      if (s.lookahead === 0) {
        if (flush === Z_NO_FLUSH$2) {
          return BS_NEED_MORE;
        }

        break;
        /* flush the current block */
      }
    }
    /* Output a literal byte */


    s.match_length = 0; //Tracevv((stderr,"%c", s->window[s->strstart]));

    /*** _tr_tally_lit(s, s.window[s.strstart], bflush); ***/

    bflush = _tr_tally(s, 0, s.window[s.strstart]);
    s.lookahead--;
    s.strstart++;

    if (bflush) {
      /*** FLUSH_BLOCK(s, 0); ***/
      flush_block_only(s, false);

      if (s.strm.avail_out === 0) {
        return BS_NEED_MORE;
      }
      /***/

    }
  }

  s.insert = 0;

  if (flush === Z_FINISH$3) {
    /*** FLUSH_BLOCK(s, 1); ***/
    flush_block_only(s, true);

    if (s.strm.avail_out === 0) {
      return BS_FINISH_STARTED;
    }
    /***/


    return BS_FINISH_DONE;
  }

  if (s.last_lit) {
    /*** FLUSH_BLOCK(s, 0); ***/
    flush_block_only(s, false);

    if (s.strm.avail_out === 0) {
      return BS_NEED_MORE;
    }
    /***/

  }

  return BS_BLOCK_DONE;
};
/* Values for max_lazy_match, good_match and max_chain_length, depending on
 * the desired pack level (0..9). The values given below have been tuned to
 * exclude worst case performance for pathological files. Better values may be
 * found for specific files.
 */


function Config(good_length, max_lazy, nice_length, max_chain, func) {
  this.good_length = good_length;
  this.max_lazy = max_lazy;
  this.nice_length = nice_length;
  this.max_chain = max_chain;
  this.func = func;
}

const configuration_table = [
/*      good lazy nice chain */
new Config(0, 0, 0, 0, deflate_stored),
/* 0 store only */
new Config(4, 4, 8, 4, deflate_fast),
/* 1 max speed, no lazy matches */
new Config(4, 5, 16, 8, deflate_fast),
/* 2 */
new Config(4, 6, 32, 32, deflate_fast),
/* 3 */
new Config(4, 4, 16, 16, deflate_slow),
/* 4 lazy matches */
new Config(8, 16, 32, 32, deflate_slow),
/* 5 */
new Config(8, 16, 128, 128, deflate_slow),
/* 6 */
new Config(8, 32, 128, 256, deflate_slow),
/* 7 */
new Config(32, 128, 258, 1024, deflate_slow),
/* 8 */
new Config(32, 258, 258, 4096, deflate_slow)
/* 9 max compression */
];
/* ===========================================================================
 * Initialize the "longest match" routines for a new zlib stream
 */

const lm_init = s => {
  s.window_size = 2 * s.w_size;
  /*** CLEAR_HASH(s); ***/

  zero(s.head); // Fill with NIL (= 0);

  /* Set the default configuration parameters:
   */

  s.max_lazy_match = configuration_table[s.level].max_lazy;
  s.good_match = configuration_table[s.level].good_length;
  s.nice_match = configuration_table[s.level].nice_length;
  s.max_chain_length = configuration_table[s.level].max_chain;
  s.strstart = 0;
  s.block_start = 0;
  s.lookahead = 0;
  s.insert = 0;
  s.match_length = s.prev_length = MIN_MATCH - 1;
  s.match_available = 0;
  s.ins_h = 0;
};

function DeflateState() {
  this.strm = null;
  /* pointer back to this zlib stream */

  this.status = 0;
  /* as the name implies */

  this.pending_buf = null;
  /* output still pending */

  this.pending_buf_size = 0;
  /* size of pending_buf */

  this.pending_out = 0;
  /* next pending byte to output to the stream */

  this.pending = 0;
  /* nb of bytes in the pending buffer */

  this.wrap = 0;
  /* bit 0 true for zlib, bit 1 true for gzip */

  this.gzhead = null;
  /* gzip header information to write */

  this.gzindex = 0;
  /* where in extra, name, or comment */

  this.method = Z_DEFLATED$2;
  /* can only be DEFLATED */

  this.last_flush = -1;
  /* value of flush param for previous deflate call */

  this.w_size = 0;
  /* LZ77 window size (32K by default) */

  this.w_bits = 0;
  /* log2(w_size)  (8..16) */

  this.w_mask = 0;
  /* w_size - 1 */

  this.window = null;
  /* Sliding window. Input bytes are read into the second half of the window,
   * and move to the first half later to keep a dictionary of at least wSize
   * bytes. With this organization, matches are limited to a distance of
   * wSize-MAX_MATCH bytes, but this ensures that IO is always
   * performed with a length multiple of the block size.
   */

  this.window_size = 0;
  /* Actual size of window: 2*wSize, except when the user input buffer
   * is directly used as sliding window.
   */

  this.prev = null;
  /* Link to older string with same hash index. To limit the size of this
   * array to 64K, this link is maintained only for the last 32K strings.
   * An index in this array is thus a window index modulo 32K.
   */

  this.head = null;
  /* Heads of the hash chains or NIL. */

  this.ins_h = 0;
  /* hash index of string to be inserted */

  this.hash_size = 0;
  /* number of elements in hash table */

  this.hash_bits = 0;
  /* log2(hash_size) */

  this.hash_mask = 0;
  /* hash_size-1 */

  this.hash_shift = 0;
  /* Number of bits by which ins_h must be shifted at each input
   * step. It must be such that after MIN_MATCH steps, the oldest
   * byte no longer takes part in the hash key, that is:
   *   hash_shift * MIN_MATCH >= hash_bits
   */

  this.block_start = 0;
  /* Window position at the beginning of the current output block. Gets
   * negative when the window is moved backwards.
   */

  this.match_length = 0;
  /* length of best match */

  this.prev_match = 0;
  /* previous match */

  this.match_available = 0;
  /* set if previous match exists */

  this.strstart = 0;
  /* start of string to insert */

  this.match_start = 0;
  /* start of matching string */

  this.lookahead = 0;
  /* number of valid bytes ahead in window */

  this.prev_length = 0;
  /* Length of the best match at previous step. Matches not greater than this
   * are discarded. This is used in the lazy match evaluation.
   */

  this.max_chain_length = 0;
  /* To speed up deflation, hash chains are never searched beyond this
   * length.  A higher limit improves compression ratio but degrades the
   * speed.
   */

  this.max_lazy_match = 0;
  /* Attempt to find a better match only when the current match is strictly
   * smaller than this value. This mechanism is used only for compression
   * levels >= 4.
   */
  // That's alias to max_lazy_match, don't use directly
  //this.max_insert_length = 0;

  /* Insert new strings in the hash table only if the match length is not
   * greater than this length. This saves time but degrades compression.
   * max_insert_length is used only for compression levels <= 3.
   */

  this.level = 0;
  /* compression level (1..9) */

  this.strategy = 0;
  /* favor or force Huffman coding*/

  this.good_match = 0;
  /* Use a faster search when the previous match is longer than this */

  this.nice_match = 0;
  /* Stop searching when current match exceeds this */

  /* used by trees.c: */

  /* Didn't use ct_data typedef below to suppress compiler warning */
  // struct ct_data_s dyn_ltree[HEAP_SIZE];   /* literal and length tree */
  // struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */
  // struct ct_data_s bl_tree[2*BL_CODES+1];  /* Huffman tree for bit lengths */
  // Use flat array of DOUBLE size, with interleaved fata,
  // because JS does not support effective

  this.dyn_ltree = new Uint16Array(HEAP_SIZE * 2);
  this.dyn_dtree = new Uint16Array((2 * D_CODES + 1) * 2);
  this.bl_tree = new Uint16Array((2 * BL_CODES + 1) * 2);
  zero(this.dyn_ltree);
  zero(this.dyn_dtree);
  zero(this.bl_tree);
  this.l_desc = null;
  /* desc. for literal tree */

  this.d_desc = null;
  /* desc. for distance tree */

  this.bl_desc = null;
  /* desc. for bit length tree */
  //ush bl_count[MAX_BITS+1];

  this.bl_count = new Uint16Array(MAX_BITS + 1);
  /* number of codes at each bit length for an optimal tree */
  //int heap[2*L_CODES+1];      /* heap used to build the Huffman trees */

  this.heap = new Uint16Array(2 * L_CODES + 1);
  /* heap used to build the Huffman trees */

  zero(this.heap);
  this.heap_len = 0;
  /* number of elements in the heap */

  this.heap_max = 0;
  /* element of largest frequency */

  /* The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used.
   * The same heap array is used to build all trees.
   */

  this.depth = new Uint16Array(2 * L_CODES + 1); //uch depth[2*L_CODES+1];

  zero(this.depth);
  /* Depth of each subtree used as tie breaker for trees of equal frequency
   */

  this.l_buf = 0;
  /* buffer index for literals or lengths */

  this.lit_bufsize = 0;
  /* Size of match buffer for literals/lengths.  There are 4 reasons for
   * limiting lit_bufsize to 64K:
   *   - frequencies can be kept in 16 bit counters
   *   - if compression is not successful for the first block, all input
   *     data is still in the window so we can still emit a stored block even
   *     when input comes from standard input.  (This can also be done for
   *     all blocks if lit_bufsize is not greater than 32K.)
   *   - if compression is not successful for a file smaller than 64K, we can
   *     even emit a stored file instead of a stored block (saving 5 bytes).
   *     This is applicable only for zip (not gzip or zlib).
   *   - creating new Huffman trees less frequently may not provide fast
   *     adaptation to changes in the input data statistics. (Take for
   *     example a binary file with poorly compressible code followed by
   *     a highly compressible string table.) Smaller buffer sizes give
   *     fast adaptation but have of course the overhead of transmitting
   *     trees more frequently.
   *   - I can't count above 4
   */

  this.last_lit = 0;
  /* running index in l_buf */

  this.d_buf = 0;
  /* Buffer index for distances. To simplify the code, d_buf and l_buf have
   * the same number of elements. To use different lengths, an extra flag
   * array would be necessary.
   */

  this.opt_len = 0;
  /* bit length of current block with optimal trees */

  this.static_len = 0;
  /* bit length of current block with static trees */

  this.matches = 0;
  /* number of string matches in current block */

  this.insert = 0;
  /* bytes at end of window left to insert */

  this.bi_buf = 0;
  /* Output buffer. bits are inserted starting at the bottom (least
   * significant bits).
   */

  this.bi_valid = 0;
  /* Number of valid bits in bi_buf.  All bits above the last valid bit
   * are always zero.
   */
  // Used for window memory init. We safely ignore it for JS. That makes
  // sense only for pointers and memory check tools.
  //this.high_water = 0;

  /* High water mark offset in window for initialized bytes -- bytes above
   * this are set to zero in order to avoid memory check warnings when
   * longest match routines access bytes past the input.  This is then
   * updated to the new high water mark.
   */
}

const deflateResetKeep = strm => {
  if (!strm || !strm.state) {
    return err(strm, Z_STREAM_ERROR$2);
  }

  strm.total_in = strm.total_out = 0;
  strm.data_type = Z_UNKNOWN;
  const s = strm.state;
  s.pending = 0;
  s.pending_out = 0;

  if (s.wrap < 0) {
    s.wrap = -s.wrap;
    /* was made negative by deflate(..., Z_FINISH); */
  }

  s.status = s.wrap ? INIT_STATE : BUSY_STATE;
  strm.adler = s.wrap === 2 ? 0 // crc32(0, Z_NULL, 0)
  : 1; // adler32(0, Z_NULL, 0)

  s.last_flush = Z_NO_FLUSH$2;

  _tr_init(s);

  return Z_OK$3;
};

const deflateReset = strm => {
  const ret = deflateResetKeep(strm);

  if (ret === Z_OK$3) {
    lm_init(strm.state);
  }

  return ret;
};

const deflateSetHeader = (strm, head) => {
  if (!strm || !strm.state) {
    return Z_STREAM_ERROR$2;
  }

  if (strm.state.wrap !== 2) {
    return Z_STREAM_ERROR$2;
  }

  strm.state.gzhead = head;
  return Z_OK$3;
};

const deflateInit2 = (strm, level, method, windowBits, memLevel, strategy) => {
  if (!strm) {
    // === Z_NULL
    return Z_STREAM_ERROR$2;
  }

  let wrap = 1;

  if (level === Z_DEFAULT_COMPRESSION$1) {
    level = 6;
  }

  if (windowBits < 0) {
    /* suppress zlib wrapper */
    wrap = 0;
    windowBits = -windowBits;
  } else if (windowBits > 15) {
    wrap = 2;
    /* write gzip wrapper instead */

    windowBits -= 16;
  }

  if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method !== Z_DEFLATED$2 || windowBits < 8 || windowBits > 15 || level < 0 || level > 9 || strategy < 0 || strategy > Z_FIXED) {
    return err(strm, Z_STREAM_ERROR$2);
  }

  if (windowBits === 8) {
    windowBits = 9;
  }
  /* until 256-byte window bug fixed */


  const s = new DeflateState();
  strm.state = s;
  s.strm = strm;
  s.wrap = wrap;
  s.gzhead = null;
  s.w_bits = windowBits;
  s.w_size = 1 << s.w_bits;
  s.w_mask = s.w_size - 1;
  s.hash_bits = memLevel + 7;
  s.hash_size = 1 << s.hash_bits;
  s.hash_mask = s.hash_size - 1;
  s.hash_shift = ~~((s.hash_bits + MIN_MATCH - 1) / MIN_MATCH);
  s.window = new Uint8Array(s.w_size * 2);
  s.head = new Uint16Array(s.hash_size);
  s.prev = new Uint16Array(s.w_size); // Don't need mem init magic for JS.
  //s.high_water = 0;  /* nothing written to s->window yet */

  s.lit_bufsize = 1 << memLevel + 6;
  /* 16K elements by default */

  s.pending_buf_size = s.lit_bufsize * 4; //overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
  //s->pending_buf = (uchf *) overlay;

  s.pending_buf = new Uint8Array(s.pending_buf_size); // It is offset from `s.pending_buf` (size is `s.lit_bufsize * 2`)
  //s->d_buf = overlay + s->lit_bufsize/sizeof(ush);

  s.d_buf = 1 * s.lit_bufsize; //s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;

  s.l_buf = (1 + 2) * s.lit_bufsize;
  s.level = level;
  s.strategy = strategy;
  s.method = method;
  return deflateReset(strm);
};

const deflateInit = (strm, level) => {
  return deflateInit2(strm, level, Z_DEFLATED$2, MAX_WBITS$1, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY$1);
};

const deflate$2 = (strm, flush) => {
  let beg, val; // for gzip header write only

  if (!strm || !strm.state || flush > Z_BLOCK$1 || flush < 0) {
    return strm ? err(strm, Z_STREAM_ERROR$2) : Z_STREAM_ERROR$2;
  }

  const s = strm.state;

  if (!strm.output || !strm.input && strm.avail_in !== 0 || s.status === FINISH_STATE && flush !== Z_FINISH$3) {
    return err(strm, strm.avail_out === 0 ? Z_BUF_ERROR$1 : Z_STREAM_ERROR$2);
  }

  s.strm = strm;
  /* just in case */

  const old_flush = s.last_flush;
  s.last_flush = flush;
  /* Write the header */

  if (s.status === INIT_STATE) {
    if (s.wrap === 2) {
      // GZIP header
      strm.adler = 0; //crc32(0L, Z_NULL, 0);

      put_byte(s, 31);
      put_byte(s, 139);
      put_byte(s, 8);

      if (!s.gzhead) {
        // s->gzhead == Z_NULL
        put_byte(s, 0);
        put_byte(s, 0);
        put_byte(s, 0);
        put_byte(s, 0);
        put_byte(s, 0);
        put_byte(s, s.level === 9 ? 2 : s.strategy >= Z_HUFFMAN_ONLY || s.level < 2 ? 4 : 0);
        put_byte(s, OS_CODE);
        s.status = BUSY_STATE;
      } else {
        put_byte(s, (s.gzhead.text ? 1 : 0) + (s.gzhead.hcrc ? 2 : 0) + (!s.gzhead.extra ? 0 : 4) + (!s.gzhead.name ? 0 : 8) + (!s.gzhead.comment ? 0 : 16));
        put_byte(s, s.gzhead.time & 0xff);
        put_byte(s, s.gzhead.time >> 8 & 0xff);
        put_byte(s, s.gzhead.time >> 16 & 0xff);
        put_byte(s, s.gzhead.time >> 24 & 0xff);
        put_byte(s, s.level === 9 ? 2 : s.strategy >= Z_HUFFMAN_ONLY || s.level < 2 ? 4 : 0);
        put_byte(s, s.gzhead.os & 0xff);

        if (s.gzhead.extra && s.gzhead.extra.length) {
          put_byte(s, s.gzhead.extra.length & 0xff);
          put_byte(s, s.gzhead.extra.length >> 8 & 0xff);
        }

        if (s.gzhead.hcrc) {
          strm.adler = crc32_1(strm.adler, s.pending_buf, s.pending, 0);
        }

        s.gzindex = 0;
        s.status = EXTRA_STATE;
      }
    } else // DEFLATE header
      {
        let header = Z_DEFLATED$2 + (s.w_bits - 8 << 4) << 8;
        let level_flags = -1;

        if (s.strategy >= Z_HUFFMAN_ONLY || s.level < 2) {
          level_flags = 0;
        } else if (s.level < 6) {
          level_flags = 1;
        } else if (s.level === 6) {
          level_flags = 2;
        } else {
          level_flags = 3;
        }

        header |= level_flags << 6;

        if (s.strstart !== 0) {
          header |= PRESET_DICT;
        }

        header += 31 - header % 31;
        s.status = BUSY_STATE;
        putShortMSB(s, header);
        /* Save the adler32 of the preset dictionary: */

        if (s.strstart !== 0) {
          putShortMSB(s, strm.adler >>> 16);
          putShortMSB(s, strm.adler & 0xffff);
        }

        strm.adler = 1; // adler32(0L, Z_NULL, 0);
      }
  } //#ifdef GZIP


  if (s.status === EXTRA_STATE) {
    if (s.gzhead.extra
    /* != Z_NULL*/
    ) {
      beg = s.pending;
      /* start of bytes to update crc */

      while (s.gzindex < (s.gzhead.extra.length & 0xffff)) {
        if (s.pending === s.pending_buf_size) {
          if (s.gzhead.hcrc && s.pending > beg) {
            strm.adler = crc32_1(strm.adler, s.pending_buf, s.pending - beg, beg);
          }

          flush_pending(strm);
          beg = s.pending;

          if (s.pending === s.pending_buf_size) {
            break;
          }
        }

        put_byte(s, s.gzhead.extra[s.gzindex] & 0xff);
        s.gzindex++;
      }

      if (s.gzhead.hcrc && s.pending > beg) {
        strm.adler = crc32_1(strm.adler, s.pending_buf, s.pending - beg, beg);
      }

      if (s.gzindex === s.gzhead.extra.length) {
        s.gzindex = 0;
        s.status = NAME_STATE;
      }
    } else {
      s.status = NAME_STATE;
    }
  }

  if (s.status === NAME_STATE) {
    if (s.gzhead.name
    /* != Z_NULL*/
    ) {
      beg = s.pending;
      /* start of bytes to update crc */
      //int val;

      do {
        if (s.pending === s.pending_buf_size) {
          if (s.gzhead.hcrc && s.pending > beg) {
            strm.adler = crc32_1(strm.adler, s.pending_buf, s.pending - beg, beg);
          }

          flush_pending(strm);
          beg = s.pending;

          if (s.pending === s.pending_buf_size) {
            val = 1;
            break;
          }
        } // JS specific: little magic to add zero terminator to end of string


        if (s.gzindex < s.gzhead.name.length) {
          val = s.gzhead.name.charCodeAt(s.gzindex++) & 0xff;
        } else {
          val = 0;
        }

        put_byte(s, val);
      } while (val !== 0);

      if (s.gzhead.hcrc && s.pending > beg) {
        strm.adler = crc32_1(strm.adler, s.pending_buf, s.pending - beg, beg);
      }

      if (val === 0) {
        s.gzindex = 0;
        s.status = COMMENT_STATE;
      }
    } else {
      s.status = COMMENT_STATE;
    }
  }

  if (s.status === COMMENT_STATE) {
    if (s.gzhead.comment
    /* != Z_NULL*/
    ) {
      beg = s.pending;
      /* start of bytes to update crc */
      //int val;

      do {
        if (s.pending === s.pending_buf_size) {
          if (s.gzhead.hcrc && s.pending > beg) {
            strm.adler = crc32_1(strm.adler, s.pending_buf, s.pending - beg, beg);
          }

          flush_pending(strm);
          beg = s.pending;

          if (s.pending === s.pending_buf_size) {
            val = 1;
            break;
          }
        } // JS specific: little magic to add zero terminator to end of string


        if (s.gzindex < s.gzhead.comment.length) {
          val = s.gzhead.comment.charCodeAt(s.gzindex++) & 0xff;
        } else {
          val = 0;
        }

        put_byte(s, val);
      } while (val !== 0);

      if (s.gzhead.hcrc && s.pending > beg) {
        strm.adler = crc32_1(strm.adler, s.pending_buf, s.pending - beg, beg);
      }

      if (val === 0) {
        s.status = HCRC_STATE;
      }
    } else {
      s.status = HCRC_STATE;
    }
  }

  if (s.status === HCRC_STATE) {
    if (s.gzhead.hcrc) {
      if (s.pending + 2 > s.pending_buf_size) {
        flush_pending(strm);
      }

      if (s.pending + 2 <= s.pending_buf_size) {
        put_byte(s, strm.adler & 0xff);
        put_byte(s, strm.adler >> 8 & 0xff);
        strm.adler = 0; //crc32(0L, Z_NULL, 0);

        s.status = BUSY_STATE;
      }
    } else {
      s.status = BUSY_STATE;
    }
  } //#endif

  /* Flush as much pending output as possible */


  if (s.pending !== 0) {
    flush_pending(strm);

    if (strm.avail_out === 0) {
      /* Since avail_out is 0, deflate will be called again with
       * more output space, but possibly with both pending and
       * avail_in equal to zero. There won't be anything to do,
       * but this is not an error situation so make sure we
       * return OK instead of BUF_ERROR at next call of deflate:
       */
      s.last_flush = -1;
      return Z_OK$3;
    }
    /* Make sure there is something to do and avoid duplicate consecutive
     * flushes. For repeated and useless calls with Z_FINISH, we keep
     * returning Z_STREAM_END instead of Z_BUF_ERROR.
     */

  } else if (strm.avail_in === 0 && rank(flush) <= rank(old_flush) && flush !== Z_FINISH$3) {
    return err(strm, Z_BUF_ERROR$1);
  }
  /* User must not provide more input after the first FINISH: */


  if (s.status === FINISH_STATE && strm.avail_in !== 0) {
    return err(strm, Z_BUF_ERROR$1);
  }
  /* Start a new block or continue the current one.
   */


  if (strm.avail_in !== 0 || s.lookahead !== 0 || flush !== Z_NO_FLUSH$2 && s.status !== FINISH_STATE) {
    let bstate = s.strategy === Z_HUFFMAN_ONLY ? deflate_huff(s, flush) : s.strategy === Z_RLE ? deflate_rle(s, flush) : configuration_table[s.level].func(s, flush);

    if (bstate === BS_FINISH_STARTED || bstate === BS_FINISH_DONE) {
      s.status = FINISH_STATE;
    }

    if (bstate === BS_NEED_MORE || bstate === BS_FINISH_STARTED) {
      if (strm.avail_out === 0) {
        s.last_flush = -1;
        /* avoid BUF_ERROR next call, see above */
      }

      return Z_OK$3;
      /* If flush != Z_NO_FLUSH && avail_out == 0, the next call
       * of deflate should use the same flush parameter to make sure
       * that the flush is complete. So we don't have to output an
       * empty block here, this will be done at next call. This also
       * ensures that for a very small output buffer, we emit at most
       * one empty block.
       */
    }

    if (bstate === BS_BLOCK_DONE) {
      if (flush === Z_PARTIAL_FLUSH) {
        _tr_align(s);
      } else if (flush !== Z_BLOCK$1) {
        /* FULL_FLUSH or SYNC_FLUSH */
        _tr_stored_block(s, 0, 0, false);
        /* For a full flush, this empty block will be recognized
         * as a special marker by inflate_sync().
         */


        if (flush === Z_FULL_FLUSH$1) {
          /*** CLEAR_HASH(s); ***/

          /* forget history */
          zero(s.head); // Fill with NIL (= 0);

          if (s.lookahead === 0) {
            s.strstart = 0;
            s.block_start = 0;
            s.insert = 0;
          }
        }
      }

      flush_pending(strm);

      if (strm.avail_out === 0) {
        s.last_flush = -1;
        /* avoid BUF_ERROR at next call, see above */

        return Z_OK$3;
      }
    }
  } //Assert(strm->avail_out > 0, "bug2");
  //if (strm.avail_out <= 0) { throw new Error("bug2");}


  if (flush !== Z_FINISH$3) {
    return Z_OK$3;
  }

  if (s.wrap <= 0) {
    return Z_STREAM_END$3;
  }
  /* Write the trailer */


  if (s.wrap === 2) {
    put_byte(s, strm.adler & 0xff);
    put_byte(s, strm.adler >> 8 & 0xff);
    put_byte(s, strm.adler >> 16 & 0xff);
    put_byte(s, strm.adler >> 24 & 0xff);
    put_byte(s, strm.total_in & 0xff);
    put_byte(s, strm.total_in >> 8 & 0xff);
    put_byte(s, strm.total_in >> 16 & 0xff);
    put_byte(s, strm.total_in >> 24 & 0xff);
  } else {
    putShortMSB(s, strm.adler >>> 16);
    putShortMSB(s, strm.adler & 0xffff);
  }

  flush_pending(strm);
  /* If avail_out is zero, the application will call deflate again
   * to flush the rest.
   */

  if (s.wrap > 0) {
    s.wrap = -s.wrap;
  }
  /* write the trailer only once! */


  return s.pending !== 0 ? Z_OK$3 : Z_STREAM_END$3;
};

const deflateEnd = strm => {
  if (!strm
  /*== Z_NULL*/
  || !strm.state
  /*== Z_NULL*/
  ) {
    return Z_STREAM_ERROR$2;
  }

  const status = strm.state.status;

  if (status !== INIT_STATE && status !== EXTRA_STATE && status !== NAME_STATE && status !== COMMENT_STATE && status !== HCRC_STATE && status !== BUSY_STATE && status !== FINISH_STATE) {
    return err(strm, Z_STREAM_ERROR$2);
  }

  strm.state = null;
  return status === BUSY_STATE ? err(strm, Z_DATA_ERROR$2) : Z_OK$3;
};
/* =========================================================================
 * Initializes the compression dictionary from the given byte
 * sequence without producing any compressed output.
 */


const deflateSetDictionary = (strm, dictionary) => {
  let dictLength = dictionary.length;

  if (!strm
  /*== Z_NULL*/
  || !strm.state
  /*== Z_NULL*/
  ) {
    return Z_STREAM_ERROR$2;
  }

  const s = strm.state;
  const wrap = s.wrap;

  if (wrap === 2 || wrap === 1 && s.status !== INIT_STATE || s.lookahead) {
    return Z_STREAM_ERROR$2;
  }
  /* when using zlib wrappers, compute Adler-32 for provided dictionary */


  if (wrap === 1) {
    /* adler32(strm->adler, dictionary, dictLength); */
    strm.adler = adler32_1(strm.adler, dictionary, dictLength, 0);
  }

  s.wrap = 0;
  /* avoid computing Adler-32 in read_buf */

  /* if dictionary would fill window, just replace the history */

  if (dictLength >= s.w_size) {
    if (wrap === 0) {
      /* already empty otherwise */

      /*** CLEAR_HASH(s); ***/
      zero(s.head); // Fill with NIL (= 0);

      s.strstart = 0;
      s.block_start = 0;
      s.insert = 0;
    }
    /* use the tail */
    // dictionary = dictionary.slice(dictLength - s.w_size);


    let tmpDict = new Uint8Array(s.w_size);
    tmpDict.set(dictionary.subarray(dictLength - s.w_size, dictLength), 0);
    dictionary = tmpDict;
    dictLength = s.w_size;
  }
  /* insert dictionary into window and hash */


  const avail = strm.avail_in;
  const next = strm.next_in;
  const input = strm.input;
  strm.avail_in = dictLength;
  strm.next_in = 0;
  strm.input = dictionary;
  fill_window(s);

  while (s.lookahead >= MIN_MATCH) {
    let str = s.strstart;
    let n = s.lookahead - (MIN_MATCH - 1);

    do {
      /* UPDATE_HASH(s, s->ins_h, s->window[str + MIN_MATCH-1]); */
      s.ins_h = HASH(s, s.ins_h, s.window[str + MIN_MATCH - 1]);
      s.prev[str & s.w_mask] = s.head[s.ins_h];
      s.head[s.ins_h] = str;
      str++;
    } while (--n);

    s.strstart = str;
    s.lookahead = MIN_MATCH - 1;
    fill_window(s);
  }

  s.strstart += s.lookahead;
  s.block_start = s.strstart;
  s.insert = s.lookahead;
  s.lookahead = 0;
  s.match_length = s.prev_length = MIN_MATCH - 1;
  s.match_available = 0;
  strm.next_in = next;
  strm.input = input;
  strm.avail_in = avail;
  s.wrap = wrap;
  return Z_OK$3;
};

var deflateInit_1 = deflateInit;
var deflateInit2_1 = deflateInit2;
var deflateReset_1 = deflateReset;
var deflateResetKeep_1 = deflateResetKeep;
var deflateSetHeader_1 = deflateSetHeader;
var deflate_2$1 = deflate$2;
var deflateEnd_1 = deflateEnd;
var deflateSetDictionary_1 = deflateSetDictionary;
var deflateInfo = 'pako deflate (from Nodeca project)';
/* Not implemented
module.exports.deflateBound = deflateBound;
module.exports.deflateCopy = deflateCopy;
module.exports.deflateParams = deflateParams;
module.exports.deflatePending = deflatePending;
module.exports.deflatePrime = deflatePrime;
module.exports.deflateTune = deflateTune;
*/

var deflate_1$2 = {
  deflateInit: deflateInit_1,
  deflateInit2: deflateInit2_1,
  deflateReset: deflateReset_1,
  deflateResetKeep: deflateResetKeep_1,
  deflateSetHeader: deflateSetHeader_1,
  deflate: deflate_2$1,
  deflateEnd: deflateEnd_1,
  deflateSetDictionary: deflateSetDictionary_1,
  deflateInfo: deflateInfo
};

const _has = (obj, key) => {
  return Object.prototype.hasOwnProperty.call(obj, key);
};

var assign = function (obj
/*from1, from2, from3, ...*/
) {
  const sources = Array.prototype.slice.call(arguments, 1);

  while (sources.length) {
    const source = sources.shift();

    if (!source) {
      continue;
    }

    if (typeof source !== 'object') {
      throw new TypeError(source + 'must be non-object');
    }

    for (const p in source) {
      if (_has(source, p)) {
        obj[p] = source[p];
      }
    }
  }

  return obj;
}; // Join array of chunks to single array.


var flattenChunks = chunks => {
  // calculate data length
  let len = 0;

  for (let i = 0, l = chunks.length; i < l; i++) {
    len += chunks[i].length;
  } // join chunks


  const result = new Uint8Array(len);

  for (let i = 0, pos = 0, l = chunks.length; i < l; i++) {
    let chunk = chunks[i];
    result.set(chunk, pos);
    pos += chunk.length;
  }

  return result;
};

var common = {
  assign: assign,
  flattenChunks: flattenChunks
}; // String encode/decode helpers
// Quick check if we can use fast array to bin string conversion
//
// - apply(Array) can fail on Android 2.2
// - apply(Uint8Array) can fail on iOS 5.1 Safari
//

let STR_APPLY_UIA_OK = true;

try {
  String.fromCharCode.apply(null, new Uint8Array(1));
} catch (__) {
  STR_APPLY_UIA_OK = false;
} // Table with utf8 lengths (calculated by first byte of sequence)
// Note, that 5 & 6-byte values and some 4-byte values can not be represented in JS,
// because max possible codepoint is 0x10ffff


const _utf8len = new Uint8Array(256);

for (let q = 0; q < 256; q++) {
  _utf8len[q] = q >= 252 ? 6 : q >= 248 ? 5 : q >= 240 ? 4 : q >= 224 ? 3 : q >= 192 ? 2 : 1;
}

_utf8len[254] = _utf8len[254] = 1; // Invalid sequence start
// convert string to array (typed, when possible)

var string2buf = str => {
  if (typeof TextEncoder === 'function' && TextEncoder.prototype.encode) {
    return new TextEncoder().encode(str);
  }

  let buf,
      c,
      c2,
      m_pos,
      i,
      str_len = str.length,
      buf_len = 0; // count binary size

  for (m_pos = 0; m_pos < str_len; m_pos++) {
    c = str.charCodeAt(m_pos);

    if ((c & 0xfc00) === 0xd800 && m_pos + 1 < str_len) {
      c2 = str.charCodeAt(m_pos + 1);

      if ((c2 & 0xfc00) === 0xdc00) {
        c = 0x10000 + (c - 0xd800 << 10) + (c2 - 0xdc00);
        m_pos++;
      }
    }

    buf_len += c < 0x80 ? 1 : c < 0x800 ? 2 : c < 0x10000 ? 3 : 4;
  } // allocate buffer


  buf = new Uint8Array(buf_len); // convert

  for (i = 0, m_pos = 0; i < buf_len; m_pos++) {
    c = str.charCodeAt(m_pos);

    if ((c & 0xfc00) === 0xd800 && m_pos + 1 < str_len) {
      c2 = str.charCodeAt(m_pos + 1);

      if ((c2 & 0xfc00) === 0xdc00) {
        c = 0x10000 + (c - 0xd800 << 10) + (c2 - 0xdc00);
        m_pos++;
      }
    }

    if (c < 0x80) {
      /* one byte */
      buf[i++] = c;
    } else if (c < 0x800) {
      /* two bytes */
      buf[i++] = 0xC0 | c >>> 6;
      buf[i++] = 0x80 | c & 0x3f;
    } else if (c < 0x10000) {
      /* three bytes */
      buf[i++] = 0xE0 | c >>> 12;
      buf[i++] = 0x80 | c >>> 6 & 0x3f;
      buf[i++] = 0x80 | c & 0x3f;
    } else {
      /* four bytes */
      buf[i++] = 0xf0 | c >>> 18;
      buf[i++] = 0x80 | c >>> 12 & 0x3f;
      buf[i++] = 0x80 | c >>> 6 & 0x3f;
      buf[i++] = 0x80 | c & 0x3f;
    }
  }

  return buf;
}; // Helper


const buf2binstring = (buf, len) => {
  // On Chrome, the arguments in a function call that are allowed is `65534`.
  // If the length of the buffer is smaller than that, we can use this optimization,
  // otherwise we will take a slower path.
  if (len < 65534) {
    if (buf.subarray && STR_APPLY_UIA_OK) {
      return String.fromCharCode.apply(null, buf.length === len ? buf : buf.subarray(0, len));
    }
  }

  let result = '';

  for (let i = 0; i < len; i++) {
    result += String.fromCharCode(buf[i]);
  }

  return result;
}; // convert array to string


var buf2string = (buf, max) => {
  const len = max || buf.length;

  if (typeof TextDecoder === 'function' && TextDecoder.prototype.decode) {
    return new TextDecoder().decode(buf.subarray(0, max));
  }

  let i, out; // Reserve max possible length (2 words per char)
  // NB: by unknown reasons, Array is significantly faster for
  //     String.fromCharCode.apply than Uint16Array.

  const utf16buf = new Array(len * 2);

  for (out = 0, i = 0; i < len;) {
    let c = buf[i++]; // quick process ascii

    if (c < 0x80) {
      utf16buf[out++] = c;
      continue;
    }

    let c_len = _utf8len[c]; // skip 5 & 6 byte codes

    if (c_len > 4) {
      utf16buf[out++] = 0xfffd;
      i += c_len - 1;
      continue;
    } // apply mask on first byte


    c &= c_len === 2 ? 0x1f : c_len === 3 ? 0x0f : 0x07; // join the rest

    while (c_len > 1 && i < len) {
      c = c << 6 | buf[i++] & 0x3f;
      c_len--;
    } // terminated by end of string?


    if (c_len > 1) {
      utf16buf[out++] = 0xfffd;
      continue;
    }

    if (c < 0x10000) {
      utf16buf[out++] = c;
    } else {
      c -= 0x10000;
      utf16buf[out++] = 0xd800 | c >> 10 & 0x3ff;
      utf16buf[out++] = 0xdc00 | c & 0x3ff;
    }
  }

  return buf2binstring(utf16buf, out);
}; // Calculate max possible position in utf8 buffer,
// that will not break sequence. If that's not possible
// - (very small limits) return max size as is.
//
// buf[] - utf8 bytes array
// max   - length limit (mandatory);


var utf8border = (buf, max) => {
  max = max || buf.length;

  if (max > buf.length) {
    max = buf.length;
  } // go back from last position, until start of sequence found


  let pos = max - 1;

  while (pos >= 0 && (buf[pos] & 0xC0) === 0x80) {
    pos--;
  } // Very small and broken sequence,
  // return max, because we should return something anyway.


  if (pos < 0) {
    return max;
  } // If we came to start of buffer - that means buffer is too small,
  // return max too.


  if (pos === 0) {
    return max;
  }

  return pos + _utf8len[buf[pos]] > max ? pos : max;
};

var strings = {
  string2buf: string2buf,
  buf2string: buf2string,
  utf8border: utf8border
}; // (C) 1995-2013 Jean-loup Gailly and Mark Adler
// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//   claim that you wrote the original software. If you use this software
//   in a product, an acknowledgment in the product documentation would be
//   appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//   misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.

function ZStream() {
  /* next input byte */
  this.input = null; // JS specific, because we have no pointers

  this.next_in = 0;
  /* number of bytes available at input */

  this.avail_in = 0;
  /* total number of input bytes read so far */

  this.total_in = 0;
  /* next output byte should be put there */

  this.output = null; // JS specific, because we have no pointers

  this.next_out = 0;
  /* remaining free space at output */

  this.avail_out = 0;
  /* total number of bytes output so far */

  this.total_out = 0;
  /* last error message, NULL if no error */

  this.msg = ''
  /*Z_NULL*/
  ;
  /* not visible by applications */

  this.state = null;
  /* best guess about the data type: binary or text */

  this.data_type = 2
  /*Z_UNKNOWN*/
  ;
  /* adler32 value of the uncompressed data */

  this.adler = 0;
}

var zstream = ZStream;
const toString$1 = Object.prototype.toString;
/* Public constants ==========================================================*/

/* ===========================================================================*/

const {
  Z_NO_FLUSH: Z_NO_FLUSH$1,
  Z_SYNC_FLUSH,
  Z_FULL_FLUSH,
  Z_FINISH: Z_FINISH$2,
  Z_OK: Z_OK$2,
  Z_STREAM_END: Z_STREAM_END$2,
  Z_DEFAULT_COMPRESSION,
  Z_DEFAULT_STRATEGY,
  Z_DEFLATED: Z_DEFLATED$1
} = constants$2;
/* ===========================================================================*/

/**
 * class Deflate
 *
 * Generic JS-style wrapper for zlib calls. If you don't need
 * streaming behaviour - use more simple functions: [[deflate]],
 * [[deflateRaw]] and [[gzip]].
 **/

/* internal
 * Deflate.chunks -> Array
 *
 * Chunks of output data, if [[Deflate#onData]] not overridden.
 **/

/**
 * Deflate.result -> Uint8Array
 *
 * Compressed result, generated by default [[Deflate#onData]]
 * and [[Deflate#onEnd]] handlers. Filled after you push last chunk
 * (call [[Deflate#push]] with `Z_FINISH` / `true` param).
 **/

/**
 * Deflate.err -> Number
 *
 * Error code after deflate finished. 0 (Z_OK) on success.
 * You will not need it in real life, because deflate errors
 * are possible only on wrong options or bad `onData` / `onEnd`
 * custom handlers.
 **/

/**
 * Deflate.msg -> String
 *
 * Error message, if [[Deflate.err]] != 0
 **/

/**
 * new Deflate(options)
 * - options (Object): zlib deflate options.
 *
 * Creates new deflator instance with specified params. Throws exception
 * on bad params. Supported options:
 *
 * - `level`
 * - `windowBits`
 * - `memLevel`
 * - `strategy`
 * - `dictionary`
 *
 * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
 * for more information on these.
 *
 * Additional options, for internal needs:
 *
 * - `chunkSize` - size of generated data chunks (16K by default)
 * - `raw` (Boolean) - do raw deflate
 * - `gzip` (Boolean) - create gzip wrapper
 * - `header` (Object) - custom header for gzip
 *   - `text` (Boolean) - true if compressed data believed to be text
 *   - `time` (Number) - modification time, unix timestamp
 *   - `os` (Number) - operation system code
 *   - `extra` (Array) - array of bytes with extra data (max 65536)
 *   - `name` (String) - file name (binary string)
 *   - `comment` (String) - comment (binary string)
 *   - `hcrc` (Boolean) - true if header crc should be added
 *
 * ##### Example:
 *
 * ```javascript
 * const pako = require('pako')
 *   , chunk1 = new Uint8Array([1,2,3,4,5,6,7,8,9])
 *   , chunk2 = new Uint8Array([10,11,12,13,14,15,16,17,18,19]);
 *
 * const deflate = new pako.Deflate({ level: 3});
 *
 * deflate.push(chunk1, false);
 * deflate.push(chunk2, true);  // true -> last chunk
 *
 * if (deflate.err) { throw new Error(deflate.err); }
 *
 * console.log(deflate.result);
 * ```
 **/

function Deflate$1(options) {
  this.options = common.assign({
    level: Z_DEFAULT_COMPRESSION,
    method: Z_DEFLATED$1,
    chunkSize: 16384,
    windowBits: 15,
    memLevel: 8,
    strategy: Z_DEFAULT_STRATEGY
  }, options || {});
  let opt = this.options;

  if (opt.raw && opt.windowBits > 0) {
    opt.windowBits = -opt.windowBits;
  } else if (opt.gzip && opt.windowBits > 0 && opt.windowBits < 16) {
    opt.windowBits += 16;
  }

  this.err = 0; // error code, if happens (0 = Z_OK)

  this.msg = ''; // error message

  this.ended = false; // used to avoid multiple onEnd() calls

  this.chunks = []; // chunks of compressed data

  this.strm = new zstream();
  this.strm.avail_out = 0;
  let status = deflate_1$2.deflateInit2(this.strm, opt.level, opt.method, opt.windowBits, opt.memLevel, opt.strategy);

  if (status !== Z_OK$2) {
    throw new Error(messages[status]);
  }

  if (opt.header) {
    deflate_1$2.deflateSetHeader(this.strm, opt.header);
  }

  if (opt.dictionary) {
    let dict; // Convert data if needed

    if (typeof opt.dictionary === 'string') {
      // If we need to compress text, change encoding to utf8.
      dict = strings.string2buf(opt.dictionary);
    } else if (toString$1.call(opt.dictionary) === '[object ArrayBuffer]') {
      dict = new Uint8Array(opt.dictionary);
    } else {
      dict = opt.dictionary;
    }

    status = deflate_1$2.deflateSetDictionary(this.strm, dict);

    if (status !== Z_OK$2) {
      throw new Error(messages[status]);
    }

    this._dict_set = true;
  }
}
/**
 * Deflate#push(data[, flush_mode]) -> Boolean
 * - data (Uint8Array|ArrayBuffer|String): input data. Strings will be
 *   converted to utf8 byte sequence.
 * - flush_mode (Number|Boolean): 0..6 for corresponding Z_NO_FLUSH..Z_TREE modes.
 *   See constants. Skipped or `false` means Z_NO_FLUSH, `true` means Z_FINISH.
 *
 * Sends input data to deflate pipe, generating [[Deflate#onData]] calls with
 * new compressed chunks. Returns `true` on success. The last data block must
 * have `flush_mode` Z_FINISH (or `true`). That will flush internal pending
 * buffers and call [[Deflate#onEnd]].
 *
 * On fail call [[Deflate#onEnd]] with error code and return false.
 *
 * ##### Example
 *
 * ```javascript
 * push(chunk, false); // push one of data chunks
 * ...
 * push(chunk, true);  // push last chunk
 * ```
 **/


Deflate$1.prototype.push = function (data, flush_mode) {
  const strm = this.strm;
  const chunkSize = this.options.chunkSize;

  let status, _flush_mode;

  if (this.ended) {
    return false;
  }

  if (flush_mode === ~~flush_mode) _flush_mode = flush_mode;else _flush_mode = flush_mode === true ? Z_FINISH$2 : Z_NO_FLUSH$1; // Convert data if needed

  if (typeof data === 'string') {
    // If we need to compress text, change encoding to utf8.
    strm.input = strings.string2buf(data);
  } else if (toString$1.call(data) === '[object ArrayBuffer]') {
    strm.input = new Uint8Array(data);
  } else {
    strm.input = data;
  }

  strm.next_in = 0;
  strm.avail_in = strm.input.length;

  for (;;) {
    if (strm.avail_out === 0) {
      strm.output = new Uint8Array(chunkSize);
      strm.next_out = 0;
      strm.avail_out = chunkSize;
    } // Make sure avail_out > 6 to avoid repeating markers


    if ((_flush_mode === Z_SYNC_FLUSH || _flush_mode === Z_FULL_FLUSH) && strm.avail_out <= 6) {
      this.onData(strm.output.subarray(0, strm.next_out));
      strm.avail_out = 0;
      continue;
    }

    status = deflate_1$2.deflate(strm, _flush_mode); // Ended => flush and finish

    if (status === Z_STREAM_END$2) {
      if (strm.next_out > 0) {
        this.onData(strm.output.subarray(0, strm.next_out));
      }

      status = deflate_1$2.deflateEnd(this.strm);
      this.onEnd(status);
      this.ended = true;
      return status === Z_OK$2;
    } // Flush if out buffer full


    if (strm.avail_out === 0) {
      this.onData(strm.output);
      continue;
    } // Flush if requested and has data


    if (_flush_mode > 0 && strm.next_out > 0) {
      this.onData(strm.output.subarray(0, strm.next_out));
      strm.avail_out = 0;
      continue;
    }

    if (strm.avail_in === 0) break;
  }

  return true;
};
/**
 * Deflate#onData(chunk) -> Void
 * - chunk (Uint8Array): output data.
 *
 * By default, stores data blocks in `chunks[]` property and glue
 * those in `onEnd`. Override this handler, if you need another behaviour.
 **/


Deflate$1.prototype.onData = function (chunk) {
  this.chunks.push(chunk);
};
/**
 * Deflate#onEnd(status) -> Void
 * - status (Number): deflate status. 0 (Z_OK) on success,
 *   other if not.
 *
 * Called once after you tell deflate that the input stream is
 * complete (Z_FINISH). By default - join collected chunks,
 * free memory and fill `results` / `err` properties.
 **/


Deflate$1.prototype.onEnd = function (status) {
  // On success - join
  if (status === Z_OK$2) {
    this.result = common.flattenChunks(this.chunks);
  }

  this.chunks = [];
  this.err = status;
  this.msg = this.strm.msg;
};
/**
 * deflate(data[, options]) -> Uint8Array
 * - data (Uint8Array|String): input data to compress.
 * - options (Object): zlib deflate options.
 *
 * Compress `data` with deflate algorithm and `options`.
 *
 * Supported options are:
 *
 * - level
 * - windowBits
 * - memLevel
 * - strategy
 * - dictionary
 *
 * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
 * for more information on these.
 *
 * Sugar (options):
 *
 * - `raw` (Boolean) - say that we work with raw stream, if you don't wish to specify
 *   negative windowBits implicitly.
 *
 * ##### Example:
 *
 * ```javascript
 * const pako = require('pako')
 * const data = new Uint8Array([1,2,3,4,5,6,7,8,9]);
 *
 * console.log(pako.deflate(data));
 * ```
 **/


function deflate$1(input, options) {
  const deflator = new Deflate$1(options);
  deflator.push(input, true); // That will never happens, if you don't cheat with options :)

  if (deflator.err) {
    throw deflator.msg || messages[deflator.err];
  }

  return deflator.result;
}
/**
 * deflateRaw(data[, options]) -> Uint8Array
 * - data (Uint8Array|String): input data to compress.
 * - options (Object): zlib deflate options.
 *
 * The same as [[deflate]], but creates raw data, without wrapper
 * (header and adler32 crc).
 **/


function deflateRaw$1(input, options) {
  options = options || {};
  options.raw = true;
  return deflate$1(input, options);
}
/**
 * gzip(data[, options]) -> Uint8Array
 * - data (Uint8Array|String): input data to compress.
 * - options (Object): zlib deflate options.
 *
 * The same as [[deflate]], but create gzip wrapper instead of
 * deflate one.
 **/


function gzip$1(input, options) {
  options = options || {};
  options.gzip = true;
  return deflate$1(input, options);
}

var Deflate_1$1 = Deflate$1;
var deflate_2 = deflate$1;
var deflateRaw_1$1 = deflateRaw$1;
var gzip_1$1 = gzip$1;
var constants$1 = constants$2;
var deflate_1$1 = {
  Deflate: Deflate_1$1,
  deflate: deflate_2,
  deflateRaw: deflateRaw_1$1,
  gzip: gzip_1$1,
  constants: constants$1
}; // (C) 1995-2013 Jean-loup Gailly and Mark Adler
// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//   claim that you wrote the original software. If you use this software
//   in a product, an acknowledgment in the product documentation would be
//   appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//   misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.
// See state defs from inflate.js

const BAD$1 = 30;
/* got a data error -- remain here until reset */

const TYPE$1 = 12;
/* i: waiting for type bits, including last-flag bit */

/*
   Decode literal, length, and distance codes and write out the resulting
   literal and match bytes until either not enough input or output is
   available, an end-of-block is encountered, or a data error is encountered.
   When large enough input and output buffers are supplied to inflate(), for
   example, a 16K input buffer and a 64K output buffer, more than 95% of the
   inflate execution time is spent in this routine.

   Entry assumptions:

        state.mode === LEN
        strm.avail_in >= 6
        strm.avail_out >= 258
        start >= strm.avail_out
        state.bits < 8

   On return, state.mode is one of:

        LEN -- ran out of enough output space or enough available input
        TYPE -- reached end of block code, inflate() to interpret next block
        BAD -- error in block data

   Notes:

    - The maximum input bits used by a length/distance pair is 15 bits for the
      length code, 5 bits for the length extra, 15 bits for the distance code,
      and 13 bits for the distance extra.  This totals 48 bits, or six bytes.
      Therefore if strm.avail_in >= 6, then there is enough input to avoid
      checking for available input while decoding.

    - The maximum bytes that a single length/distance pair can output is 258
      bytes, which is the maximum length that can be coded.  inflate_fast()
      requires strm.avail_out >= 258 for each loop to avoid checking for
      output space.
 */

var inffast = function inflate_fast(strm, start) {
  let _in;
  /* local strm.input */


  let last;
  /* have enough input while in < last */

  let _out;
  /* local strm.output */


  let beg;
  /* inflate()'s initial strm.output */

  let end;
  /* while out < end, enough space available */
  //#ifdef INFLATE_STRICT

  let dmax;
  /* maximum distance from zlib header */
  //#endif

  let wsize;
  /* window size or zero if not using window */

  let whave;
  /* valid bytes in the window */

  let wnext;
  /* window write index */
  // Use `s_window` instead `window`, avoid conflict with instrumentation tools

  let s_window;
  /* allocated sliding window, if wsize != 0 */

  let hold;
  /* local strm.hold */

  let bits;
  /* local strm.bits */

  let lcode;
  /* local strm.lencode */

  let dcode;
  /* local strm.distcode */

  let lmask;
  /* mask for first level of length codes */

  let dmask;
  /* mask for first level of distance codes */

  let here;
  /* retrieved table entry */

  let op;
  /* code bits, operation, extra bits, or */

  /*  window position, window bytes to copy */

  let len;
  /* match length, unused bytes */

  let dist;
  /* match distance */

  let from;
  /* where to copy match from */

  let from_source;
  let input, output; // JS specific, because we have no pointers

  /* copy state to local variables */

  const state = strm.state; //here = state.here;

  _in = strm.next_in;
  input = strm.input;
  last = _in + (strm.avail_in - 5);
  _out = strm.next_out;
  output = strm.output;
  beg = _out - (start - strm.avail_out);
  end = _out + (strm.avail_out - 257); //#ifdef INFLATE_STRICT

  dmax = state.dmax; //#endif

  wsize = state.wsize;
  whave = state.whave;
  wnext = state.wnext;
  s_window = state.window;
  hold = state.hold;
  bits = state.bits;
  lcode = state.lencode;
  dcode = state.distcode;
  lmask = (1 << state.lenbits) - 1;
  dmask = (1 << state.distbits) - 1;
  /* decode literals and length/distances until end-of-block or not enough
     input data or output space */

  top: do {
    if (bits < 15) {
      hold += input[_in++] << bits;
      bits += 8;
      hold += input[_in++] << bits;
      bits += 8;
    }

    here = lcode[hold & lmask];

    dolen: for (;;) {
      // Goto emulation
      op = here >>> 24
      /*here.bits*/
      ;
      hold >>>= op;
      bits -= op;
      op = here >>> 16 & 0xff
      /*here.op*/
      ;

      if (op === 0) {
        /* literal */
        //Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
        //        "inflate:         literal '%c'\n" :
        //        "inflate:         literal 0x%02x\n", here.val));
        output[_out++] = here & 0xffff
        /*here.val*/
        ;
      } else if (op & 16) {
        /* length base */
        len = here & 0xffff
        /*here.val*/
        ;
        op &= 15;
        /* number of extra bits */

        if (op) {
          if (bits < op) {
            hold += input[_in++] << bits;
            bits += 8;
          }

          len += hold & (1 << op) - 1;
          hold >>>= op;
          bits -= op;
        } //Tracevv((stderr, "inflate:         length %u\n", len));


        if (bits < 15) {
          hold += input[_in++] << bits;
          bits += 8;
          hold += input[_in++] << bits;
          bits += 8;
        }

        here = dcode[hold & dmask];

        dodist: for (;;) {
          // goto emulation
          op = here >>> 24
          /*here.bits*/
          ;
          hold >>>= op;
          bits -= op;
          op = here >>> 16 & 0xff
          /*here.op*/
          ;

          if (op & 16) {
            /* distance base */
            dist = here & 0xffff
            /*here.val*/
            ;
            op &= 15;
            /* number of extra bits */

            if (bits < op) {
              hold += input[_in++] << bits;
              bits += 8;

              if (bits < op) {
                hold += input[_in++] << bits;
                bits += 8;
              }
            }

            dist += hold & (1 << op) - 1; //#ifdef INFLATE_STRICT

            if (dist > dmax) {
              strm.msg = 'invalid distance too far back';
              state.mode = BAD$1;
              break top;
            } //#endif


            hold >>>= op;
            bits -= op; //Tracevv((stderr, "inflate:         distance %u\n", dist));

            op = _out - beg;
            /* max distance in output */

            if (dist > op) {
              /* see if copy from window */
              op = dist - op;
              /* distance back in window */

              if (op > whave) {
                if (state.sane) {
                  strm.msg = 'invalid distance too far back';
                  state.mode = BAD$1;
                  break top;
                } // (!) This block is disabled in zlib defaults,
                // don't enable it for binary compatibility
                //#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
                //                if (len <= op - whave) {
                //                  do {
                //                    output[_out++] = 0;
                //                  } while (--len);
                //                  continue top;
                //                }
                //                len -= op - whave;
                //                do {
                //                  output[_out++] = 0;
                //                } while (--op > whave);
                //                if (op === 0) {
                //                  from = _out - dist;
                //                  do {
                //                    output[_out++] = output[from++];
                //                  } while (--len);
                //                  continue top;
                //                }
                //#endif

              }

              from = 0; // window index

              from_source = s_window;

              if (wnext === 0) {
                /* very common case */
                from += wsize - op;

                if (op < len) {
                  /* some from window */
                  len -= op;

                  do {
                    output[_out++] = s_window[from++];
                  } while (--op);

                  from = _out - dist;
                  /* rest from output */

                  from_source = output;
                }
              } else if (wnext < op) {
                /* wrap around window */
                from += wsize + wnext - op;
                op -= wnext;

                if (op < len) {
                  /* some from end of window */
                  len -= op;

                  do {
                    output[_out++] = s_window[from++];
                  } while (--op);

                  from = 0;

                  if (wnext < len) {
                    /* some from start of window */
                    op = wnext;
                    len -= op;

                    do {
                      output[_out++] = s_window[from++];
                    } while (--op);

                    from = _out - dist;
                    /* rest from output */

                    from_source = output;
                  }
                }
              } else {
                /* contiguous in window */
                from += wnext - op;

                if (op < len) {
                  /* some from window */
                  len -= op;

                  do {
                    output[_out++] = s_window[from++];
                  } while (--op);

                  from = _out - dist;
                  /* rest from output */

                  from_source = output;
                }
              }

              while (len > 2) {
                output[_out++] = from_source[from++];
                output[_out++] = from_source[from++];
                output[_out++] = from_source[from++];
                len -= 3;
              }

              if (len) {
                output[_out++] = from_source[from++];

                if (len > 1) {
                  output[_out++] = from_source[from++];
                }
              }
            } else {
              from = _out - dist;
              /* copy direct from output */

              do {
                /* minimum length is three */
                output[_out++] = output[from++];
                output[_out++] = output[from++];
                output[_out++] = output[from++];
                len -= 3;
              } while (len > 2);

              if (len) {
                output[_out++] = output[from++];

                if (len > 1) {
                  output[_out++] = output[from++];
                }
              }
            }
          } else if ((op & 64) === 0) {
            /* 2nd level distance code */
            here = dcode[(here & 0xffff
            /*here.val*/
            ) + (hold & (1 << op) - 1)];
            continue dodist;
          } else {
            strm.msg = 'invalid distance code';
            state.mode = BAD$1;
            break top;
          }

          break; // need to emulate goto via "continue"
        }
      } else if ((op & 64) === 0) {
        /* 2nd level length code */
        here = lcode[(here & 0xffff
        /*here.val*/
        ) + (hold & (1 << op) - 1)];
        continue dolen;
      } else if (op & 32) {
        /* end-of-block */
        //Tracevv((stderr, "inflate:         end of block\n"));
        state.mode = TYPE$1;
        break top;
      } else {
        strm.msg = 'invalid literal/length code';
        state.mode = BAD$1;
        break top;
      }

      break; // need to emulate goto via "continue"
    }
  } while (_in < last && _out < end);
  /* return unused bytes (on entry, bits < 8, so in won't go too far back) */


  len = bits >> 3;
  _in -= len;
  bits -= len << 3;
  hold &= (1 << bits) - 1;
  /* update state and return */

  strm.next_in = _in;
  strm.next_out = _out;
  strm.avail_in = _in < last ? 5 + (last - _in) : 5 - (_in - last);
  strm.avail_out = _out < end ? 257 + (end - _out) : 257 - (_out - end);
  state.hold = hold;
  state.bits = bits;
  return;
}; // (C) 1995-2013 Jean-loup Gailly and Mark Adler
// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//   claim that you wrote the original software. If you use this software
//   in a product, an acknowledgment in the product documentation would be
//   appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//   misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.


const MAXBITS = 15;
const ENOUGH_LENS$1 = 852;
const ENOUGH_DISTS$1 = 592; //const ENOUGH = (ENOUGH_LENS+ENOUGH_DISTS);

const CODES$1 = 0;
const LENS$1 = 1;
const DISTS$1 = 2;
const lbase = new Uint16Array([
/* Length codes 257..285 base */
3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0]);
const lext = new Uint8Array([
/* Length codes 257..285 extra */
16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 72, 78]);
const dbase = new Uint16Array([
/* Distance codes 0..29 base */
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577, 0, 0]);
const dext = new Uint8Array([
/* Distance codes 0..29 extra */
16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 64, 64]);

const inflate_table = (type, lens, lens_index, codes, table, table_index, work, opts) => {
  const bits = opts.bits; //here = opts.here; /* table entry for duplication */

  let len = 0;
  /* a code's length in bits */

  let sym = 0;
  /* index of code symbols */

  let min = 0,
      max = 0;
  /* minimum and maximum code lengths */

  let root = 0;
  /* number of index bits for root table */

  let curr = 0;
  /* number of index bits for current table */

  let drop = 0;
  /* code bits to drop for sub-table */

  let left = 0;
  /* number of prefix codes available */

  let used = 0;
  /* code entries in table used */

  let huff = 0;
  /* Huffman code */

  let incr;
  /* for incrementing code, index */

  let fill;
  /* index for replicating entries */

  let low;
  /* low bits for current root entry */

  let mask;
  /* mask for low root bits */

  let next;
  /* next available space in table */

  let base = null;
  /* base value table to use */

  let base_index = 0; //  let shoextra;    /* extra bits table to use */

  let end;
  /* use base and extra for symbol > end */

  const count = new Uint16Array(MAXBITS + 1); //[MAXBITS+1];    /* number of codes of each length */

  const offs = new Uint16Array(MAXBITS + 1); //[MAXBITS+1];     /* offsets in table for each length */

  let extra = null;
  let extra_index = 0;
  let here_bits, here_op, here_val;
  /*
   Process a set of code lengths to create a canonical Huffman code.  The
   code lengths are lens[0..codes-1].  Each length corresponds to the
   symbols 0..codes-1.  The Huffman code is generated by first sorting the
   symbols by length from short to long, and retaining the symbol order
   for codes with equal lengths.  Then the code starts with all zero bits
   for the first code of the shortest length, and the codes are integer
   increments for the same length, and zeros are appended as the length
   increases.  For the deflate format, these bits are stored backwards
   from their more natural integer increment ordering, and so when the
   decoding tables are built in the large loop below, the integer codes
   are incremented backwards.
    This routine assumes, but does not check, that all of the entries in
   lens[] are in the range 0..MAXBITS.  The caller must assure this.
   1..MAXBITS is interpreted as that code length.  zero means that that
   symbol does not occur in this code.
    The codes are sorted by computing a count of codes for each length,
   creating from that a table of starting indices for each length in the
   sorted table, and then entering the symbols in order in the sorted
   table.  The sorted table is work[], with that space being provided by
   the caller.
    The length counts are used for other purposes as well, i.e. finding
   the minimum and maximum length codes, determining if there are any
   codes at all, checking for a valid set of lengths, and looking ahead
   at length counts to determine sub-table sizes when building the
   decoding tables.
   */

  /* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */

  for (len = 0; len <= MAXBITS; len++) {
    count[len] = 0;
  }

  for (sym = 0; sym < codes; sym++) {
    count[lens[lens_index + sym]]++;
  }
  /* bound code lengths, force root to be within code lengths */


  root = bits;

  for (max = MAXBITS; max >= 1; max--) {
    if (count[max] !== 0) {
      break;
    }
  }

  if (root > max) {
    root = max;
  }

  if (max === 0) {
    /* no symbols to code at all */
    //table.op[opts.table_index] = 64;  //here.op = (var char)64;    /* invalid code marker */
    //table.bits[opts.table_index] = 1;   //here.bits = (var char)1;
    //table.val[opts.table_index++] = 0;   //here.val = (var short)0;
    table[table_index++] = 1 << 24 | 64 << 16 | 0; //table.op[opts.table_index] = 64;
    //table.bits[opts.table_index] = 1;
    //table.val[opts.table_index++] = 0;

    table[table_index++] = 1 << 24 | 64 << 16 | 0;
    opts.bits = 1;
    return 0;
    /* no symbols, but wait for decoding to report error */
  }

  for (min = 1; min < max; min++) {
    if (count[min] !== 0) {
      break;
    }
  }

  if (root < min) {
    root = min;
  }
  /* check for an over-subscribed or incomplete set of lengths */


  left = 1;

  for (len = 1; len <= MAXBITS; len++) {
    left <<= 1;
    left -= count[len];

    if (left < 0) {
      return -1;
    }
    /* over-subscribed */

  }

  if (left > 0 && (type === CODES$1 || max !== 1)) {
    return -1;
    /* incomplete set */
  }
  /* generate offsets into symbol table for each length for sorting */


  offs[1] = 0;

  for (len = 1; len < MAXBITS; len++) {
    offs[len + 1] = offs[len] + count[len];
  }
  /* sort symbols by length, by symbol order within each length */


  for (sym = 0; sym < codes; sym++) {
    if (lens[lens_index + sym] !== 0) {
      work[offs[lens[lens_index + sym]]++] = sym;
    }
  }
  /*
   Create and fill in decoding tables.  In this loop, the table being
   filled is at next and has curr index bits.  The code being used is huff
   with length len.  That code is converted to an index by dropping drop
   bits off of the bottom.  For codes where len is less than drop + curr,
   those top drop + curr - len bits are incremented through all values to
   fill the table with replicated entries.
    root is the number of index bits for the root table.  When len exceeds
   root, sub-tables are created pointed to by the root entry with an index
   of the low root bits of huff.  This is saved in low to check for when a
   new sub-table should be started.  drop is zero when the root table is
   being filled, and drop is root when sub-tables are being filled.
    When a new sub-table is needed, it is necessary to look ahead in the
   code lengths to determine what size sub-table is needed.  The length
   counts are used for this, and so count[] is decremented as codes are
   entered in the tables.
    used keeps track of how many table entries have been allocated from the
   provided *table space.  It is checked for LENS and DIST tables against
   the constants ENOUGH_LENS and ENOUGH_DISTS to guard against changes in
   the initial root table size constants.  See the comments in inftrees.h
   for more information.
    sym increments through all symbols, and the loop terminates when
   all codes of length max, i.e. all codes, have been processed.  This
   routine permits incomplete codes, so another loop after this one fills
   in the rest of the decoding tables with invalid code markers.
   */

  /* set up for code type */
  // poor man optimization - use if-else instead of switch,
  // to avoid deopts in old v8


  if (type === CODES$1) {
    base = extra = work;
    /* dummy value--not used */

    end = 19;
  } else if (type === LENS$1) {
    base = lbase;
    base_index -= 257;
    extra = lext;
    extra_index -= 257;
    end = 256;
  } else {
    /* DISTS */
    base = dbase;
    extra = dext;
    end = -1;
  }
  /* initialize opts for loop */


  huff = 0;
  /* starting code */

  sym = 0;
  /* starting code symbol */

  len = min;
  /* starting code length */

  next = table_index;
  /* current table to fill in */

  curr = root;
  /* current table index bits */

  drop = 0;
  /* current bits to drop from code for index */

  low = -1;
  /* trigger new sub-table when len > root */

  used = 1 << root;
  /* use root table entries */

  mask = used - 1;
  /* mask for comparing low */

  /* check available table space */

  if (type === LENS$1 && used > ENOUGH_LENS$1 || type === DISTS$1 && used > ENOUGH_DISTS$1) {
    return 1;
  }
  /* process all codes and make table entries */


  for (;;) {
    /* create table entry */
    here_bits = len - drop;

    if (work[sym] < end) {
      here_op = 0;
      here_val = work[sym];
    } else if (work[sym] > end) {
      here_op = extra[extra_index + work[sym]];
      here_val = base[base_index + work[sym]];
    } else {
      here_op = 32 + 64;
      /* end of block */

      here_val = 0;
    }
    /* replicate for those indices with low len bits equal to huff */


    incr = 1 << len - drop;
    fill = 1 << curr;
    min = fill;
    /* save offset to next table */

    do {
      fill -= incr;
      table[next + (huff >> drop) + fill] = here_bits << 24 | here_op << 16 | here_val | 0;
    } while (fill !== 0);
    /* backwards increment the len-bit code huff */


    incr = 1 << len - 1;

    while (huff & incr) {
      incr >>= 1;
    }

    if (incr !== 0) {
      huff &= incr - 1;
      huff += incr;
    } else {
      huff = 0;
    }
    /* go to next symbol, update count, len */


    sym++;

    if (--count[len] === 0) {
      if (len === max) {
        break;
      }

      len = lens[lens_index + work[sym]];
    }
    /* create new sub-table if needed */


    if (len > root && (huff & mask) !== low) {
      /* if first time, transition to sub-tables */
      if (drop === 0) {
        drop = root;
      }
      /* increment past last table */


      next += min;
      /* here min is 1 << curr */

      /* determine length of next table */

      curr = len - drop;
      left = 1 << curr;

      while (curr + drop < max) {
        left -= count[curr + drop];

        if (left <= 0) {
          break;
        }

        curr++;
        left <<= 1;
      }
      /* check for enough space */


      used += 1 << curr;

      if (type === LENS$1 && used > ENOUGH_LENS$1 || type === DISTS$1 && used > ENOUGH_DISTS$1) {
        return 1;
      }
      /* point entry in root table to sub-table */


      low = huff & mask;
      /*table.op[low] = curr;
      table.bits[low] = root;
      table.val[low] = next - opts.table_index;*/

      table[low] = root << 24 | curr << 16 | next - table_index | 0;
    }
  }
  /* fill in remaining table entry if code is incomplete (guaranteed to have
   at most one remaining entry, since if the code is incomplete, the
   maximum code length that was allowed to get this far is one bit) */


  if (huff !== 0) {
    //table.op[next + huff] = 64;            /* invalid code marker */
    //table.bits[next + huff] = len - drop;
    //table.val[next + huff] = 0;
    table[next + huff] = len - drop << 24 | 64 << 16 | 0;
  }
  /* set return parameters */
  //opts.table_index += used;


  opts.bits = root;
  return 0;
};

var inftrees = inflate_table; // (C) 1995-2013 Jean-loup Gailly and Mark Adler
// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//   claim that you wrote the original software. If you use this software
//   in a product, an acknowledgment in the product documentation would be
//   appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//   misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.

const CODES = 0;
const LENS = 1;
const DISTS = 2;
/* Public constants ==========================================================*/

/* ===========================================================================*/

const {
  Z_FINISH: Z_FINISH$1,
  Z_BLOCK,
  Z_TREES,
  Z_OK: Z_OK$1,
  Z_STREAM_END: Z_STREAM_END$1,
  Z_NEED_DICT: Z_NEED_DICT$1,
  Z_STREAM_ERROR: Z_STREAM_ERROR$1,
  Z_DATA_ERROR: Z_DATA_ERROR$1,
  Z_MEM_ERROR: Z_MEM_ERROR$1,
  Z_BUF_ERROR,
  Z_DEFLATED
} = constants$2;
/* STATES ====================================================================*/

/* ===========================================================================*/

const HEAD = 1;
/* i: waiting for magic header */

const FLAGS = 2;
/* i: waiting for method and flags (gzip) */

const TIME = 3;
/* i: waiting for modification time (gzip) */

const OS = 4;
/* i: waiting for extra flags and operating system (gzip) */

const EXLEN = 5;
/* i: waiting for extra length (gzip) */

const EXTRA = 6;
/* i: waiting for extra bytes (gzip) */

const NAME = 7;
/* i: waiting for end of file name (gzip) */

const COMMENT = 8;
/* i: waiting for end of comment (gzip) */

const HCRC = 9;
/* i: waiting for header crc (gzip) */

const DICTID = 10;
/* i: waiting for dictionary check value */

const DICT = 11;
/* waiting for inflateSetDictionary() call */

const TYPE = 12;
/* i: waiting for type bits, including last-flag bit */

const TYPEDO = 13;
/* i: same, but skip check to exit inflate on new block */

const STORED = 14;
/* i: waiting for stored size (length and complement) */

const COPY_ = 15;
/* i/o: same as COPY below, but only first time in */

const COPY = 16;
/* i/o: waiting for input or output to copy stored block */

const TABLE = 17;
/* i: waiting for dynamic block table lengths */

const LENLENS = 18;
/* i: waiting for code length code lengths */

const CODELENS = 19;
/* i: waiting for length/lit and distance code lengths */

const LEN_ = 20;
/* i: same as LEN below, but only first time in */

const LEN = 21;
/* i: waiting for length/lit/eob code */

const LENEXT = 22;
/* i: waiting for length extra bits */

const DIST = 23;
/* i: waiting for distance code */

const DISTEXT = 24;
/* i: waiting for distance extra bits */

const MATCH = 25;
/* o: waiting for output space to copy string */

const LIT = 26;
/* o: waiting for output space to write literal */

const CHECK = 27;
/* i: waiting for 32-bit check value */

const LENGTH = 28;
/* i: waiting for 32-bit length (gzip) */

const DONE = 29;
/* finished check, done -- remain here until reset */

const BAD = 30;
/* got a data error -- remain here until reset */

const MEM = 31;
/* got an inflate() memory error -- remain here until reset */

const SYNC = 32;
/* looking for synchronization bytes to restart inflate() */

/* ===========================================================================*/

const ENOUGH_LENS = 852;
const ENOUGH_DISTS = 592; //const ENOUGH =  (ENOUGH_LENS+ENOUGH_DISTS);

const MAX_WBITS = 15;
/* 32K LZ77 window */

const DEF_WBITS = MAX_WBITS;

const zswap32 = q => {
  return (q >>> 24 & 0xff) + (q >>> 8 & 0xff00) + ((q & 0xff00) << 8) + ((q & 0xff) << 24);
};

function InflateState() {
  this.mode = 0;
  /* current inflate mode */

  this.last = false;
  /* true if processing last block */

  this.wrap = 0;
  /* bit 0 true for zlib, bit 1 true for gzip */

  this.havedict = false;
  /* true if dictionary provided */

  this.flags = 0;
  /* gzip header method and flags (0 if zlib) */

  this.dmax = 0;
  /* zlib header max distance (INFLATE_STRICT) */

  this.check = 0;
  /* protected copy of check value */

  this.total = 0;
  /* protected copy of output count */
  // TODO: may be {}

  this.head = null;
  /* where to save gzip header information */

  /* sliding window */

  this.wbits = 0;
  /* log base 2 of requested window size */

  this.wsize = 0;
  /* window size or zero if not using window */

  this.whave = 0;
  /* valid bytes in the window */

  this.wnext = 0;
  /* window write index */

  this.window = null;
  /* allocated sliding window, if needed */

  /* bit accumulator */

  this.hold = 0;
  /* input bit accumulator */

  this.bits = 0;
  /* number of bits in "in" */

  /* for string and stored block copying */

  this.length = 0;
  /* literal or length of data to copy */

  this.offset = 0;
  /* distance back to copy string from */

  /* for table and code decoding */

  this.extra = 0;
  /* extra bits needed */

  /* fixed and dynamic code tables */

  this.lencode = null;
  /* starting table for length/literal codes */

  this.distcode = null;
  /* starting table for distance codes */

  this.lenbits = 0;
  /* index bits for lencode */

  this.distbits = 0;
  /* index bits for distcode */

  /* dynamic table building */

  this.ncode = 0;
  /* number of code length code lengths */

  this.nlen = 0;
  /* number of length code lengths */

  this.ndist = 0;
  /* number of distance code lengths */

  this.have = 0;
  /* number of code lengths in lens[] */

  this.next = null;
  /* next available space in codes[] */

  this.lens = new Uint16Array(320);
  /* temporary storage for code lengths */

  this.work = new Uint16Array(288);
  /* work area for code table building */

  /*
   because we don't have pointers in js, we use lencode and distcode directly
   as buffers so we don't need codes
  */
  //this.codes = new Int32Array(ENOUGH);       /* space for code tables */

  this.lendyn = null;
  /* dynamic table for length/literal codes (JS specific) */

  this.distdyn = null;
  /* dynamic table for distance codes (JS specific) */

  this.sane = 0;
  /* if false, allow invalid distance too far */

  this.back = 0;
  /* bits back of last unprocessed length/lit */

  this.was = 0;
  /* initial length of match */
}

const inflateResetKeep = strm => {
  if (!strm || !strm.state) {
    return Z_STREAM_ERROR$1;
  }

  const state = strm.state;
  strm.total_in = strm.total_out = state.total = 0;
  strm.msg = '';
  /*Z_NULL*/

  if (state.wrap) {
    /* to support ill-conceived Java test suite */
    strm.adler = state.wrap & 1;
  }

  state.mode = HEAD;
  state.last = 0;
  state.havedict = 0;
  state.dmax = 32768;
  state.head = null
  /*Z_NULL*/
  ;
  state.hold = 0;
  state.bits = 0; //state.lencode = state.distcode = state.next = state.codes;

  state.lencode = state.lendyn = new Int32Array(ENOUGH_LENS);
  state.distcode = state.distdyn = new Int32Array(ENOUGH_DISTS);
  state.sane = 1;
  state.back = -1; //Tracev((stderr, "inflate: reset\n"));

  return Z_OK$1;
};

const inflateReset = strm => {
  if (!strm || !strm.state) {
    return Z_STREAM_ERROR$1;
  }

  const state = strm.state;
  state.wsize = 0;
  state.whave = 0;
  state.wnext = 0;
  return inflateResetKeep(strm);
};

const inflateReset2 = (strm, windowBits) => {
  let wrap;
  /* get the state */

  if (!strm || !strm.state) {
    return Z_STREAM_ERROR$1;
  }

  const state = strm.state;
  /* extract wrap request from windowBits parameter */

  if (windowBits < 0) {
    wrap = 0;
    windowBits = -windowBits;
  } else {
    wrap = (windowBits >> 4) + 1;

    if (windowBits < 48) {
      windowBits &= 15;
    }
  }
  /* set number of window bits, free window if different */


  if (windowBits && (windowBits < 8 || windowBits > 15)) {
    return Z_STREAM_ERROR$1;
  }

  if (state.window !== null && state.wbits !== windowBits) {
    state.window = null;
  }
  /* update state and reset the rest of it */


  state.wrap = wrap;
  state.wbits = windowBits;
  return inflateReset(strm);
};

const inflateInit2 = (strm, windowBits) => {
  if (!strm) {
    return Z_STREAM_ERROR$1;
  } //strm.msg = Z_NULL;                 /* in case we return an error */


  const state = new InflateState(); //if (state === Z_NULL) return Z_MEM_ERROR;
  //Tracev((stderr, "inflate: allocated\n"));

  strm.state = state;
  state.window = null
  /*Z_NULL*/
  ;
  const ret = inflateReset2(strm, windowBits);

  if (ret !== Z_OK$1) {
    strm.state = null
    /*Z_NULL*/
    ;
  }

  return ret;
};

const inflateInit = strm => {
  return inflateInit2(strm, DEF_WBITS);
};
/*
 Return state with length and distance decoding tables and index sizes set to
 fixed code decoding.  Normally this returns fixed tables from inffixed.h.
 If BUILDFIXED is defined, then instead this routine builds the tables the
 first time it's called, and returns those tables the first time and
 thereafter.  This reduces the size of the code by about 2K bytes, in
 exchange for a little execution time.  However, BUILDFIXED should not be
 used for threaded applications, since the rewriting of the tables and virgin
 may not be thread-safe.
 */


let virgin = true;
let lenfix, distfix; // We have no pointers in JS, so keep tables separate

const fixedtables = state => {
  /* build fixed huffman tables if first call (may not be thread safe) */
  if (virgin) {
    lenfix = new Int32Array(512);
    distfix = new Int32Array(32);
    /* literal/length table */

    let sym = 0;

    while (sym < 144) {
      state.lens[sym++] = 8;
    }

    while (sym < 256) {
      state.lens[sym++] = 9;
    }

    while (sym < 280) {
      state.lens[sym++] = 7;
    }

    while (sym < 288) {
      state.lens[sym++] = 8;
    }

    inftrees(LENS, state.lens, 0, 288, lenfix, 0, state.work, {
      bits: 9
    });
    /* distance table */

    sym = 0;

    while (sym < 32) {
      state.lens[sym++] = 5;
    }

    inftrees(DISTS, state.lens, 0, 32, distfix, 0, state.work, {
      bits: 5
    });
    /* do this just once */

    virgin = false;
  }

  state.lencode = lenfix;
  state.lenbits = 9;
  state.distcode = distfix;
  state.distbits = 5;
};
/*
 Update the window with the last wsize (normally 32K) bytes written before
 returning.  If window does not exist yet, create it.  This is only called
 when a window is already in use, or when output has been written during this
 inflate call, but the end of the deflate stream has not been reached yet.
 It is also called to create a window for dictionary data when a dictionary
 is loaded.

 Providing output buffers larger than 32K to inflate() should provide a speed
 advantage, since only the last 32K of output is copied to the sliding window
 upon return from inflate(), and since all distances after the first 32K of
 output will fall in the output data, making match copies simpler and faster.
 The advantage may be dependent on the size of the processor's data caches.
 */


const updatewindow = (strm, src, end, copy) => {
  let dist;
  const state = strm.state;
  /* if it hasn't been done already, allocate space for the window */

  if (state.window === null) {
    state.wsize = 1 << state.wbits;
    state.wnext = 0;
    state.whave = 0;
    state.window = new Uint8Array(state.wsize);
  }
  /* copy state->wsize or less output bytes into the circular window */


  if (copy >= state.wsize) {
    state.window.set(src.subarray(end - state.wsize, end), 0);
    state.wnext = 0;
    state.whave = state.wsize;
  } else {
    dist = state.wsize - state.wnext;

    if (dist > copy) {
      dist = copy;
    } //zmemcpy(state->window + state->wnext, end - copy, dist);


    state.window.set(src.subarray(end - copy, end - copy + dist), state.wnext);
    copy -= dist;

    if (copy) {
      //zmemcpy(state->window, end - copy, copy);
      state.window.set(src.subarray(end - copy, end), 0);
      state.wnext = copy;
      state.whave = state.wsize;
    } else {
      state.wnext += dist;

      if (state.wnext === state.wsize) {
        state.wnext = 0;
      }

      if (state.whave < state.wsize) {
        state.whave += dist;
      }
    }
  }

  return 0;
};

const inflate$2 = (strm, flush) => {
  let state;
  let input, output; // input/output buffers

  let next;
  /* next input INDEX */

  let put;
  /* next output INDEX */

  let have, left;
  /* available input and output */

  let hold;
  /* bit buffer */

  let bits;
  /* bits in bit buffer */

  let _in, _out;
  /* save starting available input and output */


  let copy;
  /* number of stored or match bytes to copy */

  let from;
  /* where to copy match bytes from */

  let from_source;
  let here = 0;
  /* current decoding table entry */

  let here_bits, here_op, here_val; // paked "here" denormalized (JS specific)
  //let last;                   /* parent table entry */

  let last_bits, last_op, last_val; // paked "last" denormalized (JS specific)

  let len;
  /* length to copy for repeats, bits to drop */

  let ret;
  /* return code */

  const hbuf = new Uint8Array(4);
  /* buffer for gzip header crc calculation */

  let opts;
  let n; // temporary variable for NEED_BITS

  const order =
  /* permutation of code lengths */
  new Uint8Array([16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15]);

  if (!strm || !strm.state || !strm.output || !strm.input && strm.avail_in !== 0) {
    return Z_STREAM_ERROR$1;
  }

  state = strm.state;

  if (state.mode === TYPE) {
    state.mode = TYPEDO;
  }
  /* skip check */
  //--- LOAD() ---


  put = strm.next_out;
  output = strm.output;
  left = strm.avail_out;
  next = strm.next_in;
  input = strm.input;
  have = strm.avail_in;
  hold = state.hold;
  bits = state.bits; //---

  _in = have;
  _out = left;
  ret = Z_OK$1;

  inf_leave: // goto emulation
  for (;;) {
    switch (state.mode) {
      case HEAD:
        if (state.wrap === 0) {
          state.mode = TYPEDO;
          break;
        } //=== NEEDBITS(16);


        while (bits < 16) {
          if (have === 0) {
            break inf_leave;
          }

          have--;
          hold += input[next++] << bits;
          bits += 8;
        } //===//


        if (state.wrap & 2 && hold === 0x8b1f) {
          /* gzip header */
          state.check = 0
          /*crc32(0L, Z_NULL, 0)*/
          ; //=== CRC2(state.check, hold);

          hbuf[0] = hold & 0xff;
          hbuf[1] = hold >>> 8 & 0xff;
          state.check = crc32_1(state.check, hbuf, 2, 0); //===//
          //=== INITBITS();

          hold = 0;
          bits = 0; //===//

          state.mode = FLAGS;
          break;
        }

        state.flags = 0;
        /* expect zlib header */

        if (state.head) {
          state.head.done = false;
        }

        if (!(state.wrap & 1) ||
        /* check if zlib header allowed */
        (((hold & 0xff
        /*BITS(8)*/
        ) << 8) + (hold >> 8)) % 31) {
          strm.msg = 'incorrect header check';
          state.mode = BAD;
          break;
        }

        if ((hold & 0x0f
        /*BITS(4)*/
        ) !== Z_DEFLATED) {
          strm.msg = 'unknown compression method';
          state.mode = BAD;
          break;
        } //--- DROPBITS(4) ---//


        hold >>>= 4;
        bits -= 4; //---//

        len = (hold & 0x0f
        /*BITS(4)*/
        ) + 8;

        if (state.wbits === 0) {
          state.wbits = len;
        } else if (len > state.wbits) {
          strm.msg = 'invalid window size';
          state.mode = BAD;
          break;
        } // !!! pako patch. Force use `options.windowBits` if passed.
        // Required to always use max window size by default.


        state.dmax = 1 << state.wbits; //state.dmax = 1 << len;
        //Tracev((stderr, "inflate:   zlib header ok\n"));

        strm.adler = state.check = 1
        /*adler32(0L, Z_NULL, 0)*/
        ;
        state.mode = hold & 0x200 ? DICTID : TYPE; //=== INITBITS();

        hold = 0;
        bits = 0; //===//

        break;

      case FLAGS:
        //=== NEEDBITS(16); */
        while (bits < 16) {
          if (have === 0) {
            break inf_leave;
          }

          have--;
          hold += input[next++] << bits;
          bits += 8;
        } //===//


        state.flags = hold;

        if ((state.flags & 0xff) !== Z_DEFLATED) {
          strm.msg = 'unknown compression method';
          state.mode = BAD;
          break;
        }

        if (state.flags & 0xe000) {
          strm.msg = 'unknown header flags set';
          state.mode = BAD;
          break;
        }

        if (state.head) {
          state.head.text = hold >> 8 & 1;
        }

        if (state.flags & 0x0200) {
          //=== CRC2(state.check, hold);
          hbuf[0] = hold & 0xff;
          hbuf[1] = hold >>> 8 & 0xff;
          state.check = crc32_1(state.check, hbuf, 2, 0); //===//
        } //=== INITBITS();


        hold = 0;
        bits = 0; //===//

        state.mode = TIME;

      /* falls through */

      case TIME:
        //=== NEEDBITS(32); */
        while (bits < 32) {
          if (have === 0) {
            break inf_leave;
          }

          have--;
          hold += input[next++] << bits;
          bits += 8;
        } //===//


        if (state.head) {
          state.head.time = hold;
        }

        if (state.flags & 0x0200) {
          //=== CRC4(state.check, hold)
          hbuf[0] = hold & 0xff;
          hbuf[1] = hold >>> 8 & 0xff;
          hbuf[2] = hold >>> 16 & 0xff;
          hbuf[3] = hold >>> 24 & 0xff;
          state.check = crc32_1(state.check, hbuf, 4, 0); //===
        } //=== INITBITS();


        hold = 0;
        bits = 0; //===//

        state.mode = OS;

      /* falls through */

      case OS:
        //=== NEEDBITS(16); */
        while (bits < 16) {
          if (have === 0) {
            break inf_leave;
          }

          have--;
          hold += input[next++] << bits;
          bits += 8;
        } //===//


        if (state.head) {
          state.head.xflags = hold & 0xff;
          state.head.os = hold >> 8;
        }

        if (state.flags & 0x0200) {
          //=== CRC2(state.check, hold);
          hbuf[0] = hold & 0xff;
          hbuf[1] = hold >>> 8 & 0xff;
          state.check = crc32_1(state.check, hbuf, 2, 0); //===//
        } //=== INITBITS();


        hold = 0;
        bits = 0; //===//

        state.mode = EXLEN;

      /* falls through */

      case EXLEN:
        if (state.flags & 0x0400) {
          //=== NEEDBITS(16); */
          while (bits < 16) {
            if (have === 0) {
              break inf_leave;
            }

            have--;
            hold += input[next++] << bits;
            bits += 8;
          } //===//


          state.length = hold;

          if (state.head) {
            state.head.extra_len = hold;
          }

          if (state.flags & 0x0200) {
            //=== CRC2(state.check, hold);
            hbuf[0] = hold & 0xff;
            hbuf[1] = hold >>> 8 & 0xff;
            state.check = crc32_1(state.check, hbuf, 2, 0); //===//
          } //=== INITBITS();


          hold = 0;
          bits = 0; //===//
        } else if (state.head) {
          state.head.extra = null
          /*Z_NULL*/
          ;
        }

        state.mode = EXTRA;

      /* falls through */

      case EXTRA:
        if (state.flags & 0x0400) {
          copy = state.length;

          if (copy > have) {
            copy = have;
          }

          if (copy) {
            if (state.head) {
              len = state.head.extra_len - state.length;

              if (!state.head.extra) {
                // Use untyped array for more convenient processing later
                state.head.extra = new Uint8Array(state.head.extra_len);
              }

              state.head.extra.set(input.subarray(next, // extra field is limited to 65536 bytes
              // - no need for additional size check
              next + copy),
              /*len + copy > state.head.extra_max - len ? state.head.extra_max : copy,*/
              len); //zmemcpy(state.head.extra + len, next,
              //        len + copy > state.head.extra_max ?
              //        state.head.extra_max - len : copy);
            }

            if (state.flags & 0x0200) {
              state.check = crc32_1(state.check, input, copy, next);
            }

            have -= copy;
            next += copy;
            state.length -= copy;
          }

          if (state.length) {
            break inf_leave;
          }
        }

        state.length = 0;
        state.mode = NAME;

      /* falls through */

      case NAME:
        if (state.flags & 0x0800) {
          if (have === 0) {
            break inf_leave;
          }

          copy = 0;

          do {
            // TODO: 2 or 1 bytes?
            len = input[next + copy++];
            /* use constant limit because in js we should not preallocate memory */

            if (state.head && len && state.length < 65536
            /*state.head.name_max*/
            ) {
              state.head.name += String.fromCharCode(len);
            }
          } while (len && copy < have);

          if (state.flags & 0x0200) {
            state.check = crc32_1(state.check, input, copy, next);
          }

          have -= copy;
          next += copy;

          if (len) {
            break inf_leave;
          }
        } else if (state.head) {
          state.head.name = null;
        }

        state.length = 0;
        state.mode = COMMENT;

      /* falls through */

      case COMMENT:
        if (state.flags & 0x1000) {
          if (have === 0) {
            break inf_leave;
          }

          copy = 0;

          do {
            len = input[next + copy++];
            /* use constant limit because in js we should not preallocate memory */

            if (state.head && len && state.length < 65536
            /*state.head.comm_max*/
            ) {
              state.head.comment += String.fromCharCode(len);
            }
          } while (len && copy < have);

          if (state.flags & 0x0200) {
            state.check = crc32_1(state.check, input, copy, next);
          }

          have -= copy;
          next += copy;

          if (len) {
            break inf_leave;
          }
        } else if (state.head) {
          state.head.comment = null;
        }

        state.mode = HCRC;

      /* falls through */

      case HCRC:
        if (state.flags & 0x0200) {
          //=== NEEDBITS(16); */
          while (bits < 16) {
            if (have === 0) {
              break inf_leave;
            }

            have--;
            hold += input[next++] << bits;
            bits += 8;
          } //===//


          if (hold !== (state.check & 0xffff)) {
            strm.msg = 'header crc mismatch';
            state.mode = BAD;
            break;
          } //=== INITBITS();


          hold = 0;
          bits = 0; //===//
        }

        if (state.head) {
          state.head.hcrc = state.flags >> 9 & 1;
          state.head.done = true;
        }

        strm.adler = state.check = 0;
        state.mode = TYPE;
        break;

      case DICTID:
        //=== NEEDBITS(32); */
        while (bits < 32) {
          if (have === 0) {
            break inf_leave;
          }

          have--;
          hold += input[next++] << bits;
          bits += 8;
        } //===//


        strm.adler = state.check = zswap32(hold); //=== INITBITS();

        hold = 0;
        bits = 0; //===//

        state.mode = DICT;

      /* falls through */

      case DICT:
        if (state.havedict === 0) {
          //--- RESTORE() ---
          strm.next_out = put;
          strm.avail_out = left;
          strm.next_in = next;
          strm.avail_in = have;
          state.hold = hold;
          state.bits = bits; //---

          return Z_NEED_DICT$1;
        }

        strm.adler = state.check = 1
        /*adler32(0L, Z_NULL, 0)*/
        ;
        state.mode = TYPE;

      /* falls through */

      case TYPE:
        if (flush === Z_BLOCK || flush === Z_TREES) {
          break inf_leave;
        }

      /* falls through */

      case TYPEDO:
        if (state.last) {
          //--- BYTEBITS() ---//
          hold >>>= bits & 7;
          bits -= bits & 7; //---//

          state.mode = CHECK;
          break;
        } //=== NEEDBITS(3); */


        while (bits < 3) {
          if (have === 0) {
            break inf_leave;
          }

          have--;
          hold += input[next++] << bits;
          bits += 8;
        } //===//


        state.last = hold & 0x01
        /*BITS(1)*/
        ; //--- DROPBITS(1) ---//

        hold >>>= 1;
        bits -= 1; //---//

        switch (hold & 0x03
        /*BITS(2)*/
        ) {
          case 0:
            /* stored block */
            //Tracev((stderr, "inflate:     stored block%s\n",
            //        state.last ? " (last)" : ""));
            state.mode = STORED;
            break;

          case 1:
            /* fixed block */
            fixedtables(state); //Tracev((stderr, "inflate:     fixed codes block%s\n",
            //        state.last ? " (last)" : ""));

            state.mode = LEN_;
            /* decode codes */

            if (flush === Z_TREES) {
              //--- DROPBITS(2) ---//
              hold >>>= 2;
              bits -= 2; //---//

              break inf_leave;
            }

            break;

          case 2:
            /* dynamic block */
            //Tracev((stderr, "inflate:     dynamic codes block%s\n",
            //        state.last ? " (last)" : ""));
            state.mode = TABLE;
            break;

          case 3:
            strm.msg = 'invalid block type';
            state.mode = BAD;
        } //--- DROPBITS(2) ---//


        hold >>>= 2;
        bits -= 2; //---//

        break;

      case STORED:
        //--- BYTEBITS() ---// /* go to byte boundary */
        hold >>>= bits & 7;
        bits -= bits & 7; //---//
        //=== NEEDBITS(32); */

        while (bits < 32) {
          if (have === 0) {
            break inf_leave;
          }

          have--;
          hold += input[next++] << bits;
          bits += 8;
        } //===//


        if ((hold & 0xffff) !== (hold >>> 16 ^ 0xffff)) {
          strm.msg = 'invalid stored block lengths';
          state.mode = BAD;
          break;
        }

        state.length = hold & 0xffff; //Tracev((stderr, "inflate:       stored length %u\n",
        //        state.length));
        //=== INITBITS();

        hold = 0;
        bits = 0; //===//

        state.mode = COPY_;

        if (flush === Z_TREES) {
          break inf_leave;
        }

      /* falls through */

      case COPY_:
        state.mode = COPY;

      /* falls through */

      case COPY:
        copy = state.length;

        if (copy) {
          if (copy > have) {
            copy = have;
          }

          if (copy > left) {
            copy = left;
          }

          if (copy === 0) {
            break inf_leave;
          } //--- zmemcpy(put, next, copy); ---


          output.set(input.subarray(next, next + copy), put); //---//

          have -= copy;
          next += copy;
          left -= copy;
          put += copy;
          state.length -= copy;
          break;
        } //Tracev((stderr, "inflate:       stored end\n"));


        state.mode = TYPE;
        break;

      case TABLE:
        //=== NEEDBITS(14); */
        while (bits < 14) {
          if (have === 0) {
            break inf_leave;
          }

          have--;
          hold += input[next++] << bits;
          bits += 8;
        } //===//


        state.nlen = (hold & 0x1f
        /*BITS(5)*/
        ) + 257; //--- DROPBITS(5) ---//

        hold >>>= 5;
        bits -= 5; //---//

        state.ndist = (hold & 0x1f
        /*BITS(5)*/
        ) + 1; //--- DROPBITS(5) ---//

        hold >>>= 5;
        bits -= 5; //---//

        state.ncode = (hold & 0x0f
        /*BITS(4)*/
        ) + 4; //--- DROPBITS(4) ---//

        hold >>>= 4;
        bits -= 4; //---//
        //#ifndef PKZIP_BUG_WORKAROUND

        if (state.nlen > 286 || state.ndist > 30) {
          strm.msg = 'too many length or distance symbols';
          state.mode = BAD;
          break;
        } //#endif
        //Tracev((stderr, "inflate:       table sizes ok\n"));


        state.have = 0;
        state.mode = LENLENS;

      /* falls through */

      case LENLENS:
        while (state.have < state.ncode) {
          //=== NEEDBITS(3);
          while (bits < 3) {
            if (have === 0) {
              break inf_leave;
            }

            have--;
            hold += input[next++] << bits;
            bits += 8;
          } //===//


          state.lens[order[state.have++]] = hold & 0x07; //BITS(3);
          //--- DROPBITS(3) ---//

          hold >>>= 3;
          bits -= 3; //---//
        }

        while (state.have < 19) {
          state.lens[order[state.have++]] = 0;
        } // We have separate tables & no pointers. 2 commented lines below not needed.
        //state.next = state.codes;
        //state.lencode = state.next;
        // Switch to use dynamic table


        state.lencode = state.lendyn;
        state.lenbits = 7;
        opts = {
          bits: state.lenbits
        };
        ret = inftrees(CODES, state.lens, 0, 19, state.lencode, 0, state.work, opts);
        state.lenbits = opts.bits;

        if (ret) {
          strm.msg = 'invalid code lengths set';
          state.mode = BAD;
          break;
        } //Tracev((stderr, "inflate:       code lengths ok\n"));


        state.have = 0;
        state.mode = CODELENS;

      /* falls through */

      case CODELENS:
        while (state.have < state.nlen + state.ndist) {
          for (;;) {
            here = state.lencode[hold & (1 << state.lenbits) - 1];
            /*BITS(state.lenbits)*/

            here_bits = here >>> 24;
            here_op = here >>> 16 & 0xff;
            here_val = here & 0xffff;

            if (here_bits <= bits) {
              break;
            } //--- PULLBYTE() ---//


            if (have === 0) {
              break inf_leave;
            }

            have--;
            hold += input[next++] << bits;
            bits += 8; //---//
          }

          if (here_val < 16) {
            //--- DROPBITS(here.bits) ---//
            hold >>>= here_bits;
            bits -= here_bits; //---//

            state.lens[state.have++] = here_val;
          } else {
            if (here_val === 16) {
              //=== NEEDBITS(here.bits + 2);
              n = here_bits + 2;

              while (bits < n) {
                if (have === 0) {
                  break inf_leave;
                }

                have--;
                hold += input[next++] << bits;
                bits += 8;
              } //===//
              //--- DROPBITS(here.bits) ---//


              hold >>>= here_bits;
              bits -= here_bits; //---//

              if (state.have === 0) {
                strm.msg = 'invalid bit length repeat';
                state.mode = BAD;
                break;
              }

              len = state.lens[state.have - 1];
              copy = 3 + (hold & 0x03); //BITS(2);
              //--- DROPBITS(2) ---//

              hold >>>= 2;
              bits -= 2; //---//
            } else if (here_val === 17) {
              //=== NEEDBITS(here.bits + 3);
              n = here_bits + 3;

              while (bits < n) {
                if (have === 0) {
                  break inf_leave;
                }

                have--;
                hold += input[next++] << bits;
                bits += 8;
              } //===//
              //--- DROPBITS(here.bits) ---//


              hold >>>= here_bits;
              bits -= here_bits; //---//

              len = 0;
              copy = 3 + (hold & 0x07); //BITS(3);
              //--- DROPBITS(3) ---//

              hold >>>= 3;
              bits -= 3; //---//
            } else {
              //=== NEEDBITS(here.bits + 7);
              n = here_bits + 7;

              while (bits < n) {
                if (have === 0) {
                  break inf_leave;
                }

                have--;
                hold += input[next++] << bits;
                bits += 8;
              } //===//
              //--- DROPBITS(here.bits) ---//


              hold >>>= here_bits;
              bits -= here_bits; //---//

              len = 0;
              copy = 11 + (hold & 0x7f); //BITS(7);
              //--- DROPBITS(7) ---//

              hold >>>= 7;
              bits -= 7; //---//
            }

            if (state.have + copy > state.nlen + state.ndist) {
              strm.msg = 'invalid bit length repeat';
              state.mode = BAD;
              break;
            }

            while (copy--) {
              state.lens[state.have++] = len;
            }
          }
        }
        /* handle error breaks in while */


        if (state.mode === BAD) {
          break;
        }
        /* check for end-of-block code (better have one) */


        if (state.lens[256] === 0) {
          strm.msg = 'invalid code -- missing end-of-block';
          state.mode = BAD;
          break;
        }
        /* build code tables -- note: do not change the lenbits or distbits
           values here (9 and 6) without reading the comments in inftrees.h
           concerning the ENOUGH constants, which depend on those values */


        state.lenbits = 9;
        opts = {
          bits: state.lenbits
        };
        ret = inftrees(LENS, state.lens, 0, state.nlen, state.lencode, 0, state.work, opts); // We have separate tables & no pointers. 2 commented lines below not needed.
        // state.next_index = opts.table_index;

        state.lenbits = opts.bits; // state.lencode = state.next;

        if (ret) {
          strm.msg = 'invalid literal/lengths set';
          state.mode = BAD;
          break;
        }

        state.distbits = 6; //state.distcode.copy(state.codes);
        // Switch to use dynamic table

        state.distcode = state.distdyn;
        opts = {
          bits: state.distbits
        };
        ret = inftrees(DISTS, state.lens, state.nlen, state.ndist, state.distcode, 0, state.work, opts); // We have separate tables & no pointers. 2 commented lines below not needed.
        // state.next_index = opts.table_index;

        state.distbits = opts.bits; // state.distcode = state.next;

        if (ret) {
          strm.msg = 'invalid distances set';
          state.mode = BAD;
          break;
        } //Tracev((stderr, 'inflate:       codes ok\n'));


        state.mode = LEN_;

        if (flush === Z_TREES) {
          break inf_leave;
        }

      /* falls through */

      case LEN_:
        state.mode = LEN;

      /* falls through */

      case LEN:
        if (have >= 6 && left >= 258) {
          //--- RESTORE() ---
          strm.next_out = put;
          strm.avail_out = left;
          strm.next_in = next;
          strm.avail_in = have;
          state.hold = hold;
          state.bits = bits; //---

          inffast(strm, _out); //--- LOAD() ---

          put = strm.next_out;
          output = strm.output;
          left = strm.avail_out;
          next = strm.next_in;
          input = strm.input;
          have = strm.avail_in;
          hold = state.hold;
          bits = state.bits; //---

          if (state.mode === TYPE) {
            state.back = -1;
          }

          break;
        }

        state.back = 0;

        for (;;) {
          here = state.lencode[hold & (1 << state.lenbits) - 1];
          /*BITS(state.lenbits)*/

          here_bits = here >>> 24;
          here_op = here >>> 16 & 0xff;
          here_val = here & 0xffff;

          if (here_bits <= bits) {
            break;
          } //--- PULLBYTE() ---//


          if (have === 0) {
            break inf_leave;
          }

          have--;
          hold += input[next++] << bits;
          bits += 8; //---//
        }

        if (here_op && (here_op & 0xf0) === 0) {
          last_bits = here_bits;
          last_op = here_op;
          last_val = here_val;

          for (;;) {
            here = state.lencode[last_val + ((hold & (1 << last_bits + last_op) - 1
            /*BITS(last.bits + last.op)*/
            ) >> last_bits)];
            here_bits = here >>> 24;
            here_op = here >>> 16 & 0xff;
            here_val = here & 0xffff;

            if (last_bits + here_bits <= bits) {
              break;
            } //--- PULLBYTE() ---//


            if (have === 0) {
              break inf_leave;
            }

            have--;
            hold += input[next++] << bits;
            bits += 8; //---//
          } //--- DROPBITS(last.bits) ---//


          hold >>>= last_bits;
          bits -= last_bits; //---//

          state.back += last_bits;
        } //--- DROPBITS(here.bits) ---//


        hold >>>= here_bits;
        bits -= here_bits; //---//

        state.back += here_bits;
        state.length = here_val;

        if (here_op === 0) {
          //Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
          //        "inflate:         literal '%c'\n" :
          //        "inflate:         literal 0x%02x\n", here.val));
          state.mode = LIT;
          break;
        }

        if (here_op & 32) {
          //Tracevv((stderr, "inflate:         end of block\n"));
          state.back = -1;
          state.mode = TYPE;
          break;
        }

        if (here_op & 64) {
          strm.msg = 'invalid literal/length code';
          state.mode = BAD;
          break;
        }

        state.extra = here_op & 15;
        state.mode = LENEXT;

      /* falls through */

      case LENEXT:
        if (state.extra) {
          //=== NEEDBITS(state.extra);
          n = state.extra;

          while (bits < n) {
            if (have === 0) {
              break inf_leave;
            }

            have--;
            hold += input[next++] << bits;
            bits += 8;
          } //===//


          state.length += hold & (1 << state.extra) - 1
          /*BITS(state.extra)*/
          ; //--- DROPBITS(state.extra) ---//

          hold >>>= state.extra;
          bits -= state.extra; //---//

          state.back += state.extra;
        } //Tracevv((stderr, "inflate:         length %u\n", state.length));


        state.was = state.length;
        state.mode = DIST;

      /* falls through */

      case DIST:
        for (;;) {
          here = state.distcode[hold & (1 << state.distbits) - 1];
          /*BITS(state.distbits)*/

          here_bits = here >>> 24;
          here_op = here >>> 16 & 0xff;
          here_val = here & 0xffff;

          if (here_bits <= bits) {
            break;
          } //--- PULLBYTE() ---//


          if (have === 0) {
            break inf_leave;
          }

          have--;
          hold += input[next++] << bits;
          bits += 8; //---//
        }

        if ((here_op & 0xf0) === 0) {
          last_bits = here_bits;
          last_op = here_op;
          last_val = here_val;

          for (;;) {
            here = state.distcode[last_val + ((hold & (1 << last_bits + last_op) - 1
            /*BITS(last.bits + last.op)*/
            ) >> last_bits)];
            here_bits = here >>> 24;
            here_op = here >>> 16 & 0xff;
            here_val = here & 0xffff;

            if (last_bits + here_bits <= bits) {
              break;
            } //--- PULLBYTE() ---//


            if (have === 0) {
              break inf_leave;
            }

            have--;
            hold += input[next++] << bits;
            bits += 8; //---//
          } //--- DROPBITS(last.bits) ---//


          hold >>>= last_bits;
          bits -= last_bits; //---//

          state.back += last_bits;
        } //--- DROPBITS(here.bits) ---//


        hold >>>= here_bits;
        bits -= here_bits; //---//

        state.back += here_bits;

        if (here_op & 64) {
          strm.msg = 'invalid distance code';
          state.mode = BAD;
          break;
        }

        state.offset = here_val;
        state.extra = here_op & 15;
        state.mode = DISTEXT;

      /* falls through */

      case DISTEXT:
        if (state.extra) {
          //=== NEEDBITS(state.extra);
          n = state.extra;

          while (bits < n) {
            if (have === 0) {
              break inf_leave;
            }

            have--;
            hold += input[next++] << bits;
            bits += 8;
          } //===//


          state.offset += hold & (1 << state.extra) - 1
          /*BITS(state.extra)*/
          ; //--- DROPBITS(state.extra) ---//

          hold >>>= state.extra;
          bits -= state.extra; //---//

          state.back += state.extra;
        } //#ifdef INFLATE_STRICT


        if (state.offset > state.dmax) {
          strm.msg = 'invalid distance too far back';
          state.mode = BAD;
          break;
        } //#endif
        //Tracevv((stderr, "inflate:         distance %u\n", state.offset));


        state.mode = MATCH;

      /* falls through */

      case MATCH:
        if (left === 0) {
          break inf_leave;
        }

        copy = _out - left;

        if (state.offset > copy) {
          /* copy from window */
          copy = state.offset - copy;

          if (copy > state.whave) {
            if (state.sane) {
              strm.msg = 'invalid distance too far back';
              state.mode = BAD;
              break;
            } // (!) This block is disabled in zlib defaults,
            // don't enable it for binary compatibility
            //#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
            //          Trace((stderr, "inflate.c too far\n"));
            //          copy -= state.whave;
            //          if (copy > state.length) { copy = state.length; }
            //          if (copy > left) { copy = left; }
            //          left -= copy;
            //          state.length -= copy;
            //          do {
            //            output[put++] = 0;
            //          } while (--copy);
            //          if (state.length === 0) { state.mode = LEN; }
            //          break;
            //#endif

          }

          if (copy > state.wnext) {
            copy -= state.wnext;
            from = state.wsize - copy;
          } else {
            from = state.wnext - copy;
          }

          if (copy > state.length) {
            copy = state.length;
          }

          from_source = state.window;
        } else {
          /* copy from output */
          from_source = output;
          from = put - state.offset;
          copy = state.length;
        }

        if (copy > left) {
          copy = left;
        }

        left -= copy;
        state.length -= copy;

        do {
          output[put++] = from_source[from++];
        } while (--copy);

        if (state.length === 0) {
          state.mode = LEN;
        }

        break;

      case LIT:
        if (left === 0) {
          break inf_leave;
        }

        output[put++] = state.length;
        left--;
        state.mode = LEN;
        break;

      case CHECK:
        if (state.wrap) {
          //=== NEEDBITS(32);
          while (bits < 32) {
            if (have === 0) {
              break inf_leave;
            }

            have--; // Use '|' instead of '+' to make sure that result is signed

            hold |= input[next++] << bits;
            bits += 8;
          } //===//


          _out -= left;
          strm.total_out += _out;
          state.total += _out;

          if (_out) {
            strm.adler = state.check =
            /*UPDATE(state.check, put - _out, _out);*/
            state.flags ? crc32_1(state.check, output, _out, put - _out) : adler32_1(state.check, output, _out, put - _out);
          }

          _out = left; // NB: crc32 stored as signed 32-bit int, zswap32 returns signed too

          if ((state.flags ? hold : zswap32(hold)) !== state.check) {
            strm.msg = 'incorrect data check';
            state.mode = BAD;
            break;
          } //=== INITBITS();


          hold = 0;
          bits = 0; //===//
          //Tracev((stderr, "inflate:   check matches trailer\n"));
        }

        state.mode = LENGTH;

      /* falls through */

      case LENGTH:
        if (state.wrap && state.flags) {
          //=== NEEDBITS(32);
          while (bits < 32) {
            if (have === 0) {
              break inf_leave;
            }

            have--;
            hold += input[next++] << bits;
            bits += 8;
          } //===//


          if (hold !== (state.total & 0xffffffff)) {
            strm.msg = 'incorrect length check';
            state.mode = BAD;
            break;
          } //=== INITBITS();


          hold = 0;
          bits = 0; //===//
          //Tracev((stderr, "inflate:   length matches trailer\n"));
        }

        state.mode = DONE;

      /* falls through */

      case DONE:
        ret = Z_STREAM_END$1;
        break inf_leave;

      case BAD:
        ret = Z_DATA_ERROR$1;
        break inf_leave;

      case MEM:
        return Z_MEM_ERROR$1;

      case SYNC:
      /* falls through */

      default:
        return Z_STREAM_ERROR$1;
    }
  } // inf_leave <- here is real place for "goto inf_leave", emulated via "break inf_leave"

  /*
     Return from inflate(), updating the total counts and the check value.
     If there was no progress during the inflate() call, return a buffer
     error.  Call updatewindow() to create and/or update the window state.
     Note: a memory error from inflate() is non-recoverable.
   */
  //--- RESTORE() ---


  strm.next_out = put;
  strm.avail_out = left;
  strm.next_in = next;
  strm.avail_in = have;
  state.hold = hold;
  state.bits = bits; //---

  if (state.wsize || _out !== strm.avail_out && state.mode < BAD && (state.mode < CHECK || flush !== Z_FINISH$1)) {
    if (updatewindow(strm, strm.output, strm.next_out, _out - strm.avail_out)) ;
  }

  _in -= strm.avail_in;
  _out -= strm.avail_out;
  strm.total_in += _in;
  strm.total_out += _out;
  state.total += _out;

  if (state.wrap && _out) {
    strm.adler = state.check =
    /*UPDATE(state.check, strm.next_out - _out, _out);*/
    state.flags ? crc32_1(state.check, output, _out, strm.next_out - _out) : adler32_1(state.check, output, _out, strm.next_out - _out);
  }

  strm.data_type = state.bits + (state.last ? 64 : 0) + (state.mode === TYPE ? 128 : 0) + (state.mode === LEN_ || state.mode === COPY_ ? 256 : 0);

  if ((_in === 0 && _out === 0 || flush === Z_FINISH$1) && ret === Z_OK$1) {
    ret = Z_BUF_ERROR;
  }

  return ret;
};

const inflateEnd = strm => {
  if (!strm || !strm.state
  /*|| strm->zfree == (free_func)0*/
  ) {
    return Z_STREAM_ERROR$1;
  }

  let state = strm.state;

  if (state.window) {
    state.window = null;
  }

  strm.state = null;
  return Z_OK$1;
};

const inflateGetHeader = (strm, head) => {
  /* check state */
  if (!strm || !strm.state) {
    return Z_STREAM_ERROR$1;
  }

  const state = strm.state;

  if ((state.wrap & 2) === 0) {
    return Z_STREAM_ERROR$1;
  }
  /* save header structure */


  state.head = head;
  head.done = false;
  return Z_OK$1;
};

const inflateSetDictionary = (strm, dictionary) => {
  const dictLength = dictionary.length;
  let state;
  let dictid;
  let ret;
  /* check state */

  if (!strm
  /* == Z_NULL */
  || !strm.state
  /* == Z_NULL */
  ) {
    return Z_STREAM_ERROR$1;
  }

  state = strm.state;

  if (state.wrap !== 0 && state.mode !== DICT) {
    return Z_STREAM_ERROR$1;
  }
  /* check for correct dictionary identifier */


  if (state.mode === DICT) {
    dictid = 1;
    /* adler32(0, null, 0)*/

    /* dictid = adler32(dictid, dictionary, dictLength); */

    dictid = adler32_1(dictid, dictionary, dictLength, 0);

    if (dictid !== state.check) {
      return Z_DATA_ERROR$1;
    }
  }
  /* copy dictionary to window using updatewindow(), which will amend the
   existing dictionary if appropriate */


  ret = updatewindow(strm, dictionary, dictLength, dictLength);

  if (ret) {
    state.mode = MEM;
    return Z_MEM_ERROR$1;
  }

  state.havedict = 1; // Tracev((stderr, "inflate:   dictionary set\n"));

  return Z_OK$1;
};

var inflateReset_1 = inflateReset;
var inflateReset2_1 = inflateReset2;
var inflateResetKeep_1 = inflateResetKeep;
var inflateInit_1 = inflateInit;
var inflateInit2_1 = inflateInit2;
var inflate_2$1 = inflate$2;
var inflateEnd_1 = inflateEnd;
var inflateGetHeader_1 = inflateGetHeader;
var inflateSetDictionary_1 = inflateSetDictionary;
var inflateInfo = 'pako inflate (from Nodeca project)';
/* Not implemented
module.exports.inflateCopy = inflateCopy;
module.exports.inflateGetDictionary = inflateGetDictionary;
module.exports.inflateMark = inflateMark;
module.exports.inflatePrime = inflatePrime;
module.exports.inflateSync = inflateSync;
module.exports.inflateSyncPoint = inflateSyncPoint;
module.exports.inflateUndermine = inflateUndermine;
*/

var inflate_1$2 = {
  inflateReset: inflateReset_1,
  inflateReset2: inflateReset2_1,
  inflateResetKeep: inflateResetKeep_1,
  inflateInit: inflateInit_1,
  inflateInit2: inflateInit2_1,
  inflate: inflate_2$1,
  inflateEnd: inflateEnd_1,
  inflateGetHeader: inflateGetHeader_1,
  inflateSetDictionary: inflateSetDictionary_1,
  inflateInfo: inflateInfo
}; // (C) 1995-2013 Jean-loup Gailly and Mark Adler
// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//   claim that you wrote the original software. If you use this software
//   in a product, an acknowledgment in the product documentation would be
//   appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//   misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.

function GZheader() {
  /* true if compressed data believed to be text */
  this.text = 0;
  /* modification time */

  this.time = 0;
  /* extra flags (not used when writing a gzip file) */

  this.xflags = 0;
  /* operating system */

  this.os = 0;
  /* pointer to extra field or Z_NULL if none */

  this.extra = null;
  /* extra field length (valid if extra != Z_NULL) */

  this.extra_len = 0; // Actually, we don't need it in JS,
  // but leave for few code modifications
  //
  // Setup limits is not necessary because in js we should not preallocate memory
  // for inflate use constant limit in 65536 bytes
  //

  /* space at extra (only when reading header) */
  // this.extra_max  = 0;

  /* pointer to zero-terminated file name or Z_NULL */

  this.name = '';
  /* space at name (only when reading header) */
  // this.name_max   = 0;

  /* pointer to zero-terminated comment or Z_NULL */

  this.comment = '';
  /* space at comment (only when reading header) */
  // this.comm_max   = 0;

  /* true if there was or will be a header crc */

  this.hcrc = 0;
  /* true when done reading gzip header (not used when writing a gzip file) */

  this.done = false;
}

var gzheader = GZheader;
const toString = Object.prototype.toString;
/* Public constants ==========================================================*/

/* ===========================================================================*/

const {
  Z_NO_FLUSH,
  Z_FINISH,
  Z_OK,
  Z_STREAM_END,
  Z_NEED_DICT,
  Z_STREAM_ERROR,
  Z_DATA_ERROR,
  Z_MEM_ERROR
} = constants$2;
/* ===========================================================================*/

/**
 * class Inflate
 *
 * Generic JS-style wrapper for zlib calls. If you don't need
 * streaming behaviour - use more simple functions: [[inflate]]
 * and [[inflateRaw]].
 **/

/* internal
 * inflate.chunks -> Array
 *
 * Chunks of output data, if [[Inflate#onData]] not overridden.
 **/

/**
 * Inflate.result -> Uint8Array|String
 *
 * Uncompressed result, generated by default [[Inflate#onData]]
 * and [[Inflate#onEnd]] handlers. Filled after you push last chunk
 * (call [[Inflate#push]] with `Z_FINISH` / `true` param).
 **/

/**
 * Inflate.err -> Number
 *
 * Error code after inflate finished. 0 (Z_OK) on success.
 * Should be checked if broken data possible.
 **/

/**
 * Inflate.msg -> String
 *
 * Error message, if [[Inflate.err]] != 0
 **/

/**
 * new Inflate(options)
 * - options (Object): zlib inflate options.
 *
 * Creates new inflator instance with specified params. Throws exception
 * on bad params. Supported options:
 *
 * - `windowBits`
 * - `dictionary`
 *
 * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
 * for more information on these.
 *
 * Additional options, for internal needs:
 *
 * - `chunkSize` - size of generated data chunks (16K by default)
 * - `raw` (Boolean) - do raw inflate
 * - `to` (String) - if equal to 'string', then result will be converted
 *   from utf8 to utf16 (javascript) string. When string output requested,
 *   chunk length can differ from `chunkSize`, depending on content.
 *
 * By default, when no options set, autodetect deflate/gzip data format via
 * wrapper header.
 *
 * ##### Example:
 *
 * ```javascript
 * const pako = require('pako')
 * const chunk1 = new Uint8Array([1,2,3,4,5,6,7,8,9])
 * const chunk2 = new Uint8Array([10,11,12,13,14,15,16,17,18,19]);
 *
 * const inflate = new pako.Inflate({ level: 3});
 *
 * inflate.push(chunk1, false);
 * inflate.push(chunk2, true);  // true -> last chunk
 *
 * if (inflate.err) { throw new Error(inflate.err); }
 *
 * console.log(inflate.result);
 * ```
 **/

function Inflate$1(options) {
  this.options = common.assign({
    chunkSize: 1024 * 64,
    windowBits: 15,
    to: ''
  }, options || {});
  const opt = this.options; // Force window size for `raw` data, if not set directly,
  // because we have no header for autodetect.

  if (opt.raw && opt.windowBits >= 0 && opt.windowBits < 16) {
    opt.windowBits = -opt.windowBits;

    if (opt.windowBits === 0) {
      opt.windowBits = -15;
    }
  } // If `windowBits` not defined (and mode not raw) - set autodetect flag for gzip/deflate


  if (opt.windowBits >= 0 && opt.windowBits < 16 && !(options && options.windowBits)) {
    opt.windowBits += 32;
  } // Gzip header has no info about windows size, we can do autodetect only
  // for deflate. So, if window size not set, force it to max when gzip possible


  if (opt.windowBits > 15 && opt.windowBits < 48) {
    // bit 3 (16) -> gzipped data
    // bit 4 (32) -> autodetect gzip/deflate
    if ((opt.windowBits & 15) === 0) {
      opt.windowBits |= 15;
    }
  }

  this.err = 0; // error code, if happens (0 = Z_OK)

  this.msg = ''; // error message

  this.ended = false; // used to avoid multiple onEnd() calls

  this.chunks = []; // chunks of compressed data

  this.strm = new zstream();
  this.strm.avail_out = 0;
  let status = inflate_1$2.inflateInit2(this.strm, opt.windowBits);

  if (status !== Z_OK) {
    throw new Error(messages[status]);
  }

  this.header = new gzheader();
  inflate_1$2.inflateGetHeader(this.strm, this.header); // Setup dictionary

  if (opt.dictionary) {
    // Convert data if needed
    if (typeof opt.dictionary === 'string') {
      opt.dictionary = strings.string2buf(opt.dictionary);
    } else if (toString.call(opt.dictionary) === '[object ArrayBuffer]') {
      opt.dictionary = new Uint8Array(opt.dictionary);
    }

    if (opt.raw) {
      //In raw mode we need to set the dictionary early
      status = inflate_1$2.inflateSetDictionary(this.strm, opt.dictionary);

      if (status !== Z_OK) {
        throw new Error(messages[status]);
      }
    }
  }
}
/**
 * Inflate#push(data[, flush_mode]) -> Boolean
 * - data (Uint8Array|ArrayBuffer): input data
 * - flush_mode (Number|Boolean): 0..6 for corresponding Z_NO_FLUSH..Z_TREE
 *   flush modes. See constants. Skipped or `false` means Z_NO_FLUSH,
 *   `true` means Z_FINISH.
 *
 * Sends input data to inflate pipe, generating [[Inflate#onData]] calls with
 * new output chunks. Returns `true` on success. If end of stream detected,
 * [[Inflate#onEnd]] will be called.
 *
 * `flush_mode` is not needed for normal operation, because end of stream
 * detected automatically. You may try to use it for advanced things, but
 * this functionality was not tested.
 *
 * On fail call [[Inflate#onEnd]] with error code and return false.
 *
 * ##### Example
 *
 * ```javascript
 * push(chunk, false); // push one of data chunks
 * ...
 * push(chunk, true);  // push last chunk
 * ```
 **/


Inflate$1.prototype.push = function (data, flush_mode) {
  const strm = this.strm;
  const chunkSize = this.options.chunkSize;
  const dictionary = this.options.dictionary;

  let status, _flush_mode, last_avail_out;

  if (this.ended) return false;
  if (flush_mode === ~~flush_mode) _flush_mode = flush_mode;else _flush_mode = flush_mode === true ? Z_FINISH : Z_NO_FLUSH; // Convert data if needed

  if (toString.call(data) === '[object ArrayBuffer]') {
    strm.input = new Uint8Array(data);
  } else {
    strm.input = data;
  }

  strm.next_in = 0;
  strm.avail_in = strm.input.length;

  for (;;) {
    if (strm.avail_out === 0) {
      strm.output = new Uint8Array(chunkSize);
      strm.next_out = 0;
      strm.avail_out = chunkSize;
    }

    status = inflate_1$2.inflate(strm, _flush_mode);

    if (status === Z_NEED_DICT && dictionary) {
      status = inflate_1$2.inflateSetDictionary(strm, dictionary);

      if (status === Z_OK) {
        status = inflate_1$2.inflate(strm, _flush_mode);
      } else if (status === Z_DATA_ERROR) {
        // Replace code with more verbose
        status = Z_NEED_DICT;
      }
    } // Skip snyc markers if more data follows and not raw mode


    while (strm.avail_in > 0 && status === Z_STREAM_END && strm.state.wrap > 0 && data[strm.next_in] !== 0) {
      inflate_1$2.inflateReset(strm);
      status = inflate_1$2.inflate(strm, _flush_mode);
    }

    switch (status) {
      case Z_STREAM_ERROR:
      case Z_DATA_ERROR:
      case Z_NEED_DICT:
      case Z_MEM_ERROR:
        this.onEnd(status);
        this.ended = true;
        return false;
    } // Remember real `avail_out` value, because we may patch out buffer content
    // to align utf8 strings boundaries.


    last_avail_out = strm.avail_out;

    if (strm.next_out) {
      if (strm.avail_out === 0 || status === Z_STREAM_END) {
        if (this.options.to === 'string') {
          let next_out_utf8 = strings.utf8border(strm.output, strm.next_out);
          let tail = strm.next_out - next_out_utf8;
          let utf8str = strings.buf2string(strm.output, next_out_utf8); // move tail & realign counters

          strm.next_out = tail;
          strm.avail_out = chunkSize - tail;
          if (tail) strm.output.set(strm.output.subarray(next_out_utf8, next_out_utf8 + tail), 0);
          this.onData(utf8str);
        } else {
          this.onData(strm.output.length === strm.next_out ? strm.output : strm.output.subarray(0, strm.next_out));
        }
      }
    } // Must repeat iteration if out buffer is full


    if (status === Z_OK && last_avail_out === 0) continue; // Finalize if end of stream reached.

    if (status === Z_STREAM_END) {
      status = inflate_1$2.inflateEnd(this.strm);
      this.onEnd(status);
      this.ended = true;
      return true;
    }

    if (strm.avail_in === 0) break;
  }

  return true;
};
/**
 * Inflate#onData(chunk) -> Void
 * - chunk (Uint8Array|String): output data. When string output requested,
 *   each chunk will be string.
 *
 * By default, stores data blocks in `chunks[]` property and glue
 * those in `onEnd`. Override this handler, if you need another behaviour.
 **/


Inflate$1.prototype.onData = function (chunk) {
  this.chunks.push(chunk);
};
/**
 * Inflate#onEnd(status) -> Void
 * - status (Number): inflate status. 0 (Z_OK) on success,
 *   other if not.
 *
 * Called either after you tell inflate that the input stream is
 * complete (Z_FINISH). By default - join collected chunks,
 * free memory and fill `results` / `err` properties.
 **/


Inflate$1.prototype.onEnd = function (status) {
  // On success - join
  if (status === Z_OK) {
    if (this.options.to === 'string') {
      this.result = this.chunks.join('');
    } else {
      this.result = common.flattenChunks(this.chunks);
    }
  }

  this.chunks = [];
  this.err = status;
  this.msg = this.strm.msg;
};
/**
 * inflate(data[, options]) -> Uint8Array|String
 * - data (Uint8Array): input data to decompress.
 * - options (Object): zlib inflate options.
 *
 * Decompress `data` with inflate/ungzip and `options`. Autodetect
 * format via wrapper header by default. That's why we don't provide
 * separate `ungzip` method.
 *
 * Supported options are:
 *
 * - windowBits
 *
 * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
 * for more information.
 *
 * Sugar (options):
 *
 * - `raw` (Boolean) - say that we work with raw stream, if you don't wish to specify
 *   negative windowBits implicitly.
 * - `to` (String) - if equal to 'string', then result will be converted
 *   from utf8 to utf16 (javascript) string. When string output requested,
 *   chunk length can differ from `chunkSize`, depending on content.
 *
 *
 * ##### Example:
 *
 * ```javascript
 * const pako = require('pako');
 * const input = pako.deflate(new Uint8Array([1,2,3,4,5,6,7,8,9]));
 * let output;
 *
 * try {
 *   output = pako.inflate(input);
 * } catch (err) {
 *   console.log(err);
 * }
 * ```
 **/


function inflate$1(input, options) {
  const inflator = new Inflate$1(options);
  inflator.push(input); // That will never happens, if you don't cheat with options :)

  if (inflator.err) throw inflator.msg || messages[inflator.err];
  return inflator.result;
}
/**
 * inflateRaw(data[, options]) -> Uint8Array|String
 * - data (Uint8Array): input data to decompress.
 * - options (Object): zlib inflate options.
 *
 * The same as [[inflate]], but creates raw data, without wrapper
 * (header and adler32 crc).
 **/


function inflateRaw$1(input, options) {
  options = options || {};
  options.raw = true;
  return inflate$1(input, options);
}
/**
 * ungzip(data[, options]) -> Uint8Array|String
 * - data (Uint8Array): input data to decompress.
 * - options (Object): zlib inflate options.
 *
 * Just shortcut to [[inflate]], because it autodetects format
 * by header.content. Done for convenience.
 **/


var Inflate_1$1 = Inflate$1;
var inflate_2 = inflate$1;
var inflateRaw_1$1 = inflateRaw$1;
var ungzip$1 = inflate$1;
var constants = constants$2;
var inflate_1$1 = {
  Inflate: Inflate_1$1,
  inflate: inflate_2,
  inflateRaw: inflateRaw_1$1,
  ungzip: ungzip$1,
  constants: constants
};
const {
  Deflate,
  deflate,
  deflateRaw,
  gzip
} = deflate_1$1;
const {
  Inflate,
  inflate,
  inflateRaw,
  ungzip
} = inflate_1$1;
var Deflate_1 = Deflate;
exports.Deflate = Deflate_1;
var deflate_1 = deflate;
exports.deflate = deflate_1;
var deflateRaw_1 = deflateRaw;
exports.deflateRaw = deflateRaw_1;
var gzip_1 = gzip;
exports.gzip = gzip_1;
var Inflate_1 = Inflate;
exports.Inflate = Inflate_1;
var inflate_1 = inflate;
exports.inflate = inflate_1;
var inflateRaw_1 = inflateRaw;
exports.inflateRaw = inflateRaw_1;
var ungzip_1 = ungzip;
exports.ungzip = ungzip_1;
var constants_1 = constants$2;
exports.constants = constants_1;
var pako = {
  Deflate: Deflate_1,
  deflate: deflate_1,
  deflateRaw: deflateRaw_1,
  gzip: gzip_1,
  Inflate: Inflate_1,
  inflate: inflate_1,
  inflateRaw: inflateRaw_1,
  ungzip: ungzip_1,
  constants: constants_1
};
exports.default = pako;

},{}],19:[function(require,module,exports){
(function (Buffer){(function (){
(function() {
  var crypt = require('crypt'),
      utf8 = require('charenc').utf8,
      bin = require('charenc').bin,

  // The core
  sha1 = function (message) {
    // Convert to byte array
    if (message.constructor == String)
      message = utf8.stringToBytes(message);
    else if (typeof Buffer !== 'undefined' && typeof Buffer.isBuffer == 'function' && Buffer.isBuffer(message))
      message = Array.prototype.slice.call(message, 0);
    else if (!Array.isArray(message))
      message = message.toString();

    // otherwise assume byte array

    var m  = crypt.bytesToWords(message),
        l  = message.length * 8,
        w  = [],
        H0 =  1732584193,
        H1 = -271733879,
        H2 = -1732584194,
        H3 =  271733878,
        H4 = -1009589776;

    // Padding
    m[l >> 5] |= 0x80 << (24 - l % 32);
    m[((l + 64 >>> 9) << 4) + 15] = l;

    for (var i = 0; i < m.length; i += 16) {
      var a = H0,
          b = H1,
          c = H2,
          d = H3,
          e = H4;

      for (var j = 0; j < 80; j++) {

        if (j < 16)
          w[j] = m[i + j];
        else {
          var n = w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16];
          w[j] = (n << 1) | (n >>> 31);
        }

        var t = ((H0 << 5) | (H0 >>> 27)) + H4 + (w[j] >>> 0) + (
                j < 20 ? (H1 & H2 | ~H1 & H3) + 1518500249 :
                j < 40 ? (H1 ^ H2 ^ H3) + 1859775393 :
                j < 60 ? (H1 & H2 | H1 & H3 | H2 & H3) - 1894007588 :
                         (H1 ^ H2 ^ H3) - 899497514);

        H4 = H3;
        H3 = H2;
        H2 = (H1 << 30) | (H1 >>> 2);
        H1 = H0;
        H0 = t;
      }

      H0 += a;
      H1 += b;
      H2 += c;
      H3 += d;
      H4 += e;
    }

    return [H0, H1, H2, H3, H4];
  },

  // Public API
  api = function (message, options) {
    var digestbytes = crypt.wordsToBytes(sha1(message));
    return options && options.asBytes ? digestbytes :
        options && options.asString ? bin.bytesToString(digestbytes) :
        crypt.bytesToHex(digestbytes);
  };

  api._blocksize = 16;
  api._digestsize = 20;

  module.exports = api;
})();

}).call(this)}).call(this,require("buffer").Buffer)
},{"buffer":4,"charenc":5,"crypt":6}],20:[function(require,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.addExtensionsToContext = addExtensionsToContext;
exports.attributes = void 0;
exports.bindFramebufferInfo = bindFramebufferInfo;
exports.bindTransformFeedbackInfo = bindTransformFeedbackInfo;
exports.bindUniformBlock = bindUniformBlock;
exports.canFilter = canFilter;
exports.canGenerateMipmap = canGenerateMipmap;
exports.createAttribsFromArrays = createAttribsFromArrays;
exports.createAttributeSetters = createAttributeSetters;
exports.createBufferFromArray = createBufferFromArray;
exports.createBufferFromTypedArray = createBufferFromTypedArray;
exports.createBufferInfoFromArrays = createBufferInfoFromArrays;
exports.createBuffersFromArrays = createBuffersFromArrays;
exports.createFramebufferInfo = createFramebufferInfo;
exports.createProgram = createProgram;
exports.createProgramFromScripts = createProgramFromScripts;
exports.createProgramFromSources = createProgramFromSources;
exports.createProgramInfo = createProgramInfo;
exports.createProgramInfoFromProgram = createProgramInfoFromProgram;
exports.createSampler = createSampler;
exports.createSamplers = createSamplers;
exports.createTexture = createTexture;
exports.createTextures = createTextures;
exports.createTransformFeedback = createTransformFeedback;
exports.createTransformFeedbackInfo = createTransformFeedbackInfo;
exports.createUniformBlockInfo = createUniformBlockInfo;
exports.createUniformBlockInfoFromProgram = createUniformBlockInfoFromProgram;
exports.createUniformBlockSpecFromProgram = createUniformBlockSpecFromProgram;
exports.createUniformSetters = createUniformSetters;
exports.createVAOAndSetAttributes = createVAOAndSetAttributes;
exports.createVAOFromBufferInfo = createVAOFromBufferInfo;
exports.createVertexArrayInfo = createVertexArrayInfo;
exports.draw = void 0;
exports.drawBufferInfo = drawBufferInfo;
exports.drawObjectList = drawObjectList;
exports.framebuffers = void 0;
exports.getArray_ = getArray;
exports.getBytesPerElementForInternalFormat = getBytesPerElementForInternalFormat;
exports.getContext = getContext;
exports.getFormatAndTypeForInternalFormat = getFormatAndTypeForInternalFormat;
exports.getGLTypeForTypedArray = getGLTypeForTypedArray;
exports.getGLTypeForTypedArrayType = getGLTypeForTypedArrayType;
exports.getNumComponentsForFormat = getNumComponentsForFormat;
exports.getNumComponents_ = getNumComponents;
exports.getTypedArrayTypeForGLType = getTypedArrayTypeForGLType;
exports.getWebGLContext = getWebGLContext;
exports.isArrayBuffer = exports.glEnumToString = void 0;
exports.isWebGL1 = isWebGL1;
exports.isWebGL2 = isWebGL2;
exports.loadTextureFromUrl = loadTextureFromUrl;
exports.programs = exports.primitives = exports.m4 = void 0;
exports.resizeCanvasToDisplaySize = resizeCanvasToDisplaySize;
exports.resizeFramebufferInfo = resizeFramebufferInfo;
exports.resizeTexture = resizeTexture;
exports.setAttribInfoBufferFromArray = setAttribInfoBufferFromArray;
exports.setAttributeDefaults_ = setDefaults;
exports.setAttributePrefix = setAttributePrefix;
exports.setAttributes = setAttributes;
exports.setBlockUniforms = setBlockUniforms;
exports.setBuffersAndAttributes = setBuffersAndAttributes;
exports.setDefaultTextureColor = setDefaultTextureColor;
exports.setDefaults = setDefaults$2;
exports.setEmptyTexture = setEmptyTexture;
exports.setSamplerParameters = setSamplerParameters;
exports.setTextureDefaults_ = setDefaults$1;
exports.setTextureFilteringForSize = setTextureFilteringForSize;
exports.setTextureFromArray = setTextureFromArray;
exports.setTextureFromElement = setTextureFromElement;
exports.setTextureParameters = setTextureParameters;
exports.setUniformBlock = setUniformBlock;
exports.setUniforms = setUniforms;
exports.vertexArrays = exports.v3 = exports.utils = exports.typedarrays = exports.textures = exports.setUniformsAndBindTextures = void 0;

/* @license twgl.js 4.19.1 Copyright (c) 2015, Gregg Tavares All Rights Reserved.
Available via the MIT license.
see: http://github.com/greggman/twgl.js for details */

/*
 * Copyright 2019 Gregg Tavares
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

/**
 *
 * Vec3 math math functions.
 *
 * Almost all functions take an optional `dst` argument. If it is not passed in the
 * functions will create a new Vec3. In other words you can do this
 *
 *     var v = v3.cross(v1, v2);  // Creates a new Vec3 with the cross product of v1 x v2.
 *
 * or
 *
 *     var v = v3.create();
 *     v3.cross(v1, v2, v);  // Puts the cross product of v1 x v2 in v
 *
 * The first style is often easier but depending on where it's used it generates garbage where
 * as there is almost never allocation with the second style.
 *
 * It is always save to pass any vector as the destination. So for example
 *
 *     v3.cross(v1, v2, v1);  // Puts the cross product of v1 x v2 in v1
 *
 * @module twgl/v3
 */
let VecType = Float32Array;
/**
 * A JavaScript array with 3 values or a Float32Array with 3 values.
 * When created by the library will create the default type which is `Float32Array`
 * but can be set by calling {@link module:twgl/v3.setDefaultType}.
 * @typedef {(number[]|Float32Array)} Vec3
 * @memberOf module:twgl/v3
 */

/**
 * Sets the type this library creates for a Vec3
 * @param {constructor} ctor the constructor for the type. Either `Float32Array` or `Array`
 * @return {constructor} previous constructor for Vec3
 * @memberOf module:twgl/v3
 */

function setDefaultType(ctor) {
  const oldType = VecType;
  VecType = ctor;
  return oldType;
}
/**
 * Creates a vec3; may be called with x, y, z to set initial values.
 * @param {number} [x] Initial x value.
 * @param {number} [y] Initial y value.
 * @param {number} [z] Initial z value.
 * @return {module:twgl/v3.Vec3} the created vector
 * @memberOf module:twgl/v3
 */


function create(x, y, z) {
  const dst = new VecType(3);

  if (x) {
    dst[0] = x;
  }

  if (y) {
    dst[1] = y;
  }

  if (z) {
    dst[2] = z;
  }

  return dst;
}
/**
 * Adds two vectors; assumes a and b have the same dimension.
 * @param {module:twgl/v3.Vec3} a Operand vector.
 * @param {module:twgl/v3.Vec3} b Operand vector.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} A vector tha tis the sum of a and b.
 * @memberOf module:twgl/v3
 */


function add(a, b, dst) {
  dst = dst || new VecType(3);
  dst[0] = a[0] + b[0];
  dst[1] = a[1] + b[1];
  dst[2] = a[2] + b[2];
  return dst;
}
/**
 * Subtracts two vectors.
 * @param {module:twgl/v3.Vec3} a Operand vector.
 * @param {module:twgl/v3.Vec3} b Operand vector.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} A vector that is the difference of a and b.
 * @memberOf module:twgl/v3
 */


function subtract(a, b, dst) {
  dst = dst || new VecType(3);
  dst[0] = a[0] - b[0];
  dst[1] = a[1] - b[1];
  dst[2] = a[2] - b[2];
  return dst;
}
/**
 * Performs linear interpolation on two vectors.
 * Given vectors a and b and interpolation coefficient t, returns
 * a + t * (b - a).
 * @param {module:twgl/v3.Vec3} a Operand vector.
 * @param {module:twgl/v3.Vec3} b Operand vector.
 * @param {number} t Interpolation coefficient.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} The linear interpolated result.
 * @memberOf module:twgl/v3
 */


function lerp(a, b, t, dst) {
  dst = dst || new VecType(3);
  dst[0] = a[0] + t * (b[0] - a[0]);
  dst[1] = a[1] + t * (b[1] - a[1]);
  dst[2] = a[2] + t * (b[2] - a[2]);
  return dst;
}
/**
 * Performs linear interpolation on two vectors.
 * Given vectors a and b and interpolation coefficient vector t, returns
 * a + t * (b - a).
 * @param {module:twgl/v3.Vec3} a Operand vector.
 * @param {module:twgl/v3.Vec3} b Operand vector.
 * @param {module:twgl/v3.Vec3} t Interpolation coefficients vector.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} the linear interpolated result.
 * @memberOf module:twgl/v3
 */


function lerpV(a, b, t, dst) {
  dst = dst || new VecType(3);
  dst[0] = a[0] + t[0] * (b[0] - a[0]);
  dst[1] = a[1] + t[1] * (b[1] - a[1]);
  dst[2] = a[2] + t[2] * (b[2] - a[2]);
  return dst;
}
/**
 * Return max values of two vectors.
 * Given vectors a and b returns
 * [max(a[0], b[0]), max(a[1], b[1]), max(a[2], b[2])].
 * @param {module:twgl/v3.Vec3} a Operand vector.
 * @param {module:twgl/v3.Vec3} b Operand vector.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} The max components vector.
 * @memberOf module:twgl/v3
 */


function max(a, b, dst) {
  dst = dst || new VecType(3);
  dst[0] = Math.max(a[0], b[0]);
  dst[1] = Math.max(a[1], b[1]);
  dst[2] = Math.max(a[2], b[2]);
  return dst;
}
/**
 * Return min values of two vectors.
 * Given vectors a and b returns
 * [min(a[0], b[0]), min(a[1], b[1]), min(a[2], b[2])].
 * @param {module:twgl/v3.Vec3} a Operand vector.
 * @param {module:twgl/v3.Vec3} b Operand vector.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} The min components vector.
 * @memberOf module:twgl/v3
 */


function min(a, b, dst) {
  dst = dst || new VecType(3);
  dst[0] = Math.min(a[0], b[0]);
  dst[1] = Math.min(a[1], b[1]);
  dst[2] = Math.min(a[2], b[2]);
  return dst;
}
/**
 * Multiplies a vector by a scalar.
 * @param {module:twgl/v3.Vec3} v The vector.
 * @param {number} k The scalar.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} The scaled vector.
 * @memberOf module:twgl/v3
 */


function mulScalar(v, k, dst) {
  dst = dst || new VecType(3);
  dst[0] = v[0] * k;
  dst[1] = v[1] * k;
  dst[2] = v[2] * k;
  return dst;
}
/**
 * Divides a vector by a scalar.
 * @param {module:twgl/v3.Vec3} v The vector.
 * @param {number} k The scalar.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} The scaled vector.
 * @memberOf module:twgl/v3
 */


function divScalar(v, k, dst) {
  dst = dst || new VecType(3);
  dst[0] = v[0] / k;
  dst[1] = v[1] / k;
  dst[2] = v[2] / k;
  return dst;
}
/**
 * Computes the cross product of two vectors; assumes both vectors have
 * three entries.
 * @param {module:twgl/v3.Vec3} a Operand vector.
 * @param {module:twgl/v3.Vec3} b Operand vector.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} The vector of a cross b.
 * @memberOf module:twgl/v3
 */


function cross(a, b, dst) {
  dst = dst || new VecType(3);
  const t1 = a[2] * b[0] - a[0] * b[2];
  const t2 = a[0] * b[1] - a[1] * b[0];
  dst[0] = a[1] * b[2] - a[2] * b[1];
  dst[1] = t1;
  dst[2] = t2;
  return dst;
}
/**
 * Computes the dot product of two vectors; assumes both vectors have
 * three entries.
 * @param {module:twgl/v3.Vec3} a Operand vector.
 * @param {module:twgl/v3.Vec3} b Operand vector.
 * @return {number} dot product
 * @memberOf module:twgl/v3
 */


function dot(a, b) {
  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
}
/**
 * Computes the length of vector
 * @param {module:twgl/v3.Vec3} v vector.
 * @return {number} length of vector.
 * @memberOf module:twgl/v3
 */


function length$1(v) {
  return Math.sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
}
/**
 * Computes the square of the length of vector
 * @param {module:twgl/v3.Vec3} v vector.
 * @return {number} square of the length of vector.
 * @memberOf module:twgl/v3
 */


function lengthSq(v) {
  return v[0] * v[0] + v[1] * v[1] + v[2] * v[2];
}
/**
 * Computes the distance between 2 points
 * @param {module:twgl/v3.Vec3} a vector.
 * @param {module:twgl/v3.Vec3} b vector.
 * @return {number} distance between a and b
 * @memberOf module:twgl/v3
 */


function distance(a, b) {
  const dx = a[0] - b[0];
  const dy = a[1] - b[1];
  const dz = a[2] - b[2];
  return Math.sqrt(dx * dx + dy * dy + dz * dz);
}
/**
 * Computes the square of the distance between 2 points
 * @param {module:twgl/v3.Vec3} a vector.
 * @param {module:twgl/v3.Vec3} b vector.
 * @return {number} square of the distance between a and b
 * @memberOf module:twgl/v3
 */


function distanceSq(a, b) {
  const dx = a[0] - b[0];
  const dy = a[1] - b[1];
  const dz = a[2] - b[2];
  return dx * dx + dy * dy + dz * dz;
}
/**
 * Divides a vector by its Euclidean length and returns the quotient.
 * @param {module:twgl/v3.Vec3} a The vector.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} The normalized vector.
 * @memberOf module:twgl/v3
 */


function normalize(a, dst) {
  dst = dst || new VecType(3);
  const lenSq = a[0] * a[0] + a[1] * a[1] + a[2] * a[2];
  const len = Math.sqrt(lenSq);

  if (len > 0.00001) {
    dst[0] = a[0] / len;
    dst[1] = a[1] / len;
    dst[2] = a[2] / len;
  } else {
    dst[0] = 0;
    dst[1] = 0;
    dst[2] = 0;
  }

  return dst;
}
/**
 * Negates a vector.
 * @param {module:twgl/v3.Vec3} v The vector.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} -v.
 * @memberOf module:twgl/v3
 */


function negate(v, dst) {
  dst = dst || new VecType(3);
  dst[0] = -v[0];
  dst[1] = -v[1];
  dst[2] = -v[2];
  return dst;
}
/**
 * Copies a vector.
 * @param {module:twgl/v3.Vec3} v The vector.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} A copy of v.
 * @memberOf module:twgl/v3
 */


function copy(v, dst) {
  dst = dst || new VecType(3);
  dst[0] = v[0];
  dst[1] = v[1];
  dst[2] = v[2];
  return dst;
}
/**
 * Multiplies a vector by another vector (component-wise); assumes a and
 * b have the same length.
 * @param {module:twgl/v3.Vec3} a Operand vector.
 * @param {module:twgl/v3.Vec3} b Operand vector.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} The vector of products of entries of a and
 *     b.
 * @memberOf module:twgl/v3
 */


function multiply(a, b, dst) {
  dst = dst || new VecType(3);
  dst[0] = a[0] * b[0];
  dst[1] = a[1] * b[1];
  dst[2] = a[2] * b[2];
  return dst;
}
/**
 * Divides a vector by another vector (component-wise); assumes a and
 * b have the same length.
 * @param {module:twgl/v3.Vec3} a Operand vector.
 * @param {module:twgl/v3.Vec3} b Operand vector.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created.
 * @return {module:twgl/v3.Vec3} The vector of quotients of entries of a and
 *     b.
 * @memberOf module:twgl/v3
 */


function divide(a, b, dst) {
  dst = dst || new VecType(3);
  dst[0] = a[0] / b[0];
  dst[1] = a[1] / b[1];
  dst[2] = a[2] / b[2];
  return dst;
}

var v3 = /*#__PURE__*/Object.freeze({
  __proto__: null,
  add: add,
  copy: copy,
  create: create,
  cross: cross,
  distance: distance,
  distanceSq: distanceSq,
  divide: divide,
  divScalar: divScalar,
  dot: dot,
  lerp: lerp,
  lerpV: lerpV,
  length: length$1,
  lengthSq: lengthSq,
  max: max,
  min: min,
  mulScalar: mulScalar,
  multiply: multiply,
  negate: negate,
  normalize: normalize,
  setDefaultType: setDefaultType,
  subtract: subtract
});
/*
 * Copyright 2019 Gregg Tavares
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

/**
 * 4x4 Matrix math math functions.
 *
 * Almost all functions take an optional `dst` argument. If it is not passed in the
 * functions will create a new matrix. In other words you can do this
 *
 *     const mat = m4.translation([1, 2, 3]);  // Creates a new translation matrix
 *
 * or
 *
 *     const mat = m4.create();
 *     m4.translation([1, 2, 3], mat);  // Puts translation matrix in mat.
 *
 * The first style is often easier but depending on where it's used it generates garbage where
 * as there is almost never allocation with the second style.
 *
 * It is always save to pass any matrix as the destination. So for example
 *
 *     const mat = m4.identity();
 *     const trans = m4.translation([1, 2, 3]);
 *     m4.multiply(mat, trans, mat);  // Multiplies mat * trans and puts result in mat.
 *
 * @module twgl/m4
 */

exports.v3 = v3;
let MatType = Float32Array;
/**
 * A JavaScript array with 16 values or a Float32Array with 16 values.
 * When created by the library will create the default type which is `Float32Array`
 * but can be set by calling {@link module:twgl/m4.setDefaultType}.
 * @typedef {(number[]|Float32Array)} Mat4
 * @memberOf module:twgl/m4
 */

/**
 * Sets the type this library creates for a Mat4
 * @param {constructor} ctor the constructor for the type. Either `Float32Array` or `Array`
 * @return {constructor} previous constructor for Mat4
 * @memberOf module:twgl/m4
 */

function setDefaultType$1(ctor) {
  const oldType = MatType;
  MatType = ctor;
  return oldType;
}
/**
 * Negates a matrix.
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} -m.
 * @memberOf module:twgl/m4
 */


function negate$1(m, dst) {
  dst = dst || new MatType(16);
  dst[0] = -m[0];
  dst[1] = -m[1];
  dst[2] = -m[2];
  dst[3] = -m[3];
  dst[4] = -m[4];
  dst[5] = -m[5];
  dst[6] = -m[6];
  dst[7] = -m[7];
  dst[8] = -m[8];
  dst[9] = -m[9];
  dst[10] = -m[10];
  dst[11] = -m[11];
  dst[12] = -m[12];
  dst[13] = -m[13];
  dst[14] = -m[14];
  dst[15] = -m[15];
  return dst;
}
/**
 * Copies a matrix.
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {module:twgl/m4.Mat4} [dst] The matrix. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} A copy of m.
 * @memberOf module:twgl/m4
 */


function copy$1(m, dst) {
  dst = dst || new MatType(16);
  dst[0] = m[0];
  dst[1] = m[1];
  dst[2] = m[2];
  dst[3] = m[3];
  dst[4] = m[4];
  dst[5] = m[5];
  dst[6] = m[6];
  dst[7] = m[7];
  dst[8] = m[8];
  dst[9] = m[9];
  dst[10] = m[10];
  dst[11] = m[11];
  dst[12] = m[12];
  dst[13] = m[13];
  dst[14] = m[14];
  dst[15] = m[15];
  return dst;
}
/**
 * Creates an n-by-n identity matrix.
 *
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} An n-by-n identity matrix.
 * @memberOf module:twgl/m4
 */


function identity(dst) {
  dst = dst || new MatType(16);
  dst[0] = 1;
  dst[1] = 0;
  dst[2] = 0;
  dst[3] = 0;
  dst[4] = 0;
  dst[5] = 1;
  dst[6] = 0;
  dst[7] = 0;
  dst[8] = 0;
  dst[9] = 0;
  dst[10] = 1;
  dst[11] = 0;
  dst[12] = 0;
  dst[13] = 0;
  dst[14] = 0;
  dst[15] = 1;
  return dst;
}
/**
 * Takes the transpose of a matrix.
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The transpose of m.
 * @memberOf module:twgl/m4
 */


function transpose(m, dst) {
  dst = dst || new MatType(16);

  if (dst === m) {
    let t;
    t = m[1];
    m[1] = m[4];
    m[4] = t;
    t = m[2];
    m[2] = m[8];
    m[8] = t;
    t = m[3];
    m[3] = m[12];
    m[12] = t;
    t = m[6];
    m[6] = m[9];
    m[9] = t;
    t = m[7];
    m[7] = m[13];
    m[13] = t;
    t = m[11];
    m[11] = m[14];
    m[14] = t;
    return dst;
  }

  const m00 = m[0 * 4 + 0];
  const m01 = m[0 * 4 + 1];
  const m02 = m[0 * 4 + 2];
  const m03 = m[0 * 4 + 3];
  const m10 = m[1 * 4 + 0];
  const m11 = m[1 * 4 + 1];
  const m12 = m[1 * 4 + 2];
  const m13 = m[1 * 4 + 3];
  const m20 = m[2 * 4 + 0];
  const m21 = m[2 * 4 + 1];
  const m22 = m[2 * 4 + 2];
  const m23 = m[2 * 4 + 3];
  const m30 = m[3 * 4 + 0];
  const m31 = m[3 * 4 + 1];
  const m32 = m[3 * 4 + 2];
  const m33 = m[3 * 4 + 3];
  dst[0] = m00;
  dst[1] = m10;
  dst[2] = m20;
  dst[3] = m30;
  dst[4] = m01;
  dst[5] = m11;
  dst[6] = m21;
  dst[7] = m31;
  dst[8] = m02;
  dst[9] = m12;
  dst[10] = m22;
  dst[11] = m32;
  dst[12] = m03;
  dst[13] = m13;
  dst[14] = m23;
  dst[15] = m33;
  return dst;
}
/**
 * Computes the inverse of a 4-by-4 matrix.
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The inverse of m.
 * @memberOf module:twgl/m4
 */


function inverse(m, dst) {
  dst = dst || new MatType(16);
  const m00 = m[0 * 4 + 0];
  const m01 = m[0 * 4 + 1];
  const m02 = m[0 * 4 + 2];
  const m03 = m[0 * 4 + 3];
  const m10 = m[1 * 4 + 0];
  const m11 = m[1 * 4 + 1];
  const m12 = m[1 * 4 + 2];
  const m13 = m[1 * 4 + 3];
  const m20 = m[2 * 4 + 0];
  const m21 = m[2 * 4 + 1];
  const m22 = m[2 * 4 + 2];
  const m23 = m[2 * 4 + 3];
  const m30 = m[3 * 4 + 0];
  const m31 = m[3 * 4 + 1];
  const m32 = m[3 * 4 + 2];
  const m33 = m[3 * 4 + 3];
  const tmp_0 = m22 * m33;
  const tmp_1 = m32 * m23;
  const tmp_2 = m12 * m33;
  const tmp_3 = m32 * m13;
  const tmp_4 = m12 * m23;
  const tmp_5 = m22 * m13;
  const tmp_6 = m02 * m33;
  const tmp_7 = m32 * m03;
  const tmp_8 = m02 * m23;
  const tmp_9 = m22 * m03;
  const tmp_10 = m02 * m13;
  const tmp_11 = m12 * m03;
  const tmp_12 = m20 * m31;
  const tmp_13 = m30 * m21;
  const tmp_14 = m10 * m31;
  const tmp_15 = m30 * m11;
  const tmp_16 = m10 * m21;
  const tmp_17 = m20 * m11;
  const tmp_18 = m00 * m31;
  const tmp_19 = m30 * m01;
  const tmp_20 = m00 * m21;
  const tmp_21 = m20 * m01;
  const tmp_22 = m00 * m11;
  const tmp_23 = m10 * m01;
  const t0 = tmp_0 * m11 + tmp_3 * m21 + tmp_4 * m31 - (tmp_1 * m11 + tmp_2 * m21 + tmp_5 * m31);
  const t1 = tmp_1 * m01 + tmp_6 * m21 + tmp_9 * m31 - (tmp_0 * m01 + tmp_7 * m21 + tmp_8 * m31);
  const t2 = tmp_2 * m01 + tmp_7 * m11 + tmp_10 * m31 - (tmp_3 * m01 + tmp_6 * m11 + tmp_11 * m31);
  const t3 = tmp_5 * m01 + tmp_8 * m11 + tmp_11 * m21 - (tmp_4 * m01 + tmp_9 * m11 + tmp_10 * m21);
  const d = 1.0 / (m00 * t0 + m10 * t1 + m20 * t2 + m30 * t3);
  dst[0] = d * t0;
  dst[1] = d * t1;
  dst[2] = d * t2;
  dst[3] = d * t3;
  dst[4] = d * (tmp_1 * m10 + tmp_2 * m20 + tmp_5 * m30 - (tmp_0 * m10 + tmp_3 * m20 + tmp_4 * m30));
  dst[5] = d * (tmp_0 * m00 + tmp_7 * m20 + tmp_8 * m30 - (tmp_1 * m00 + tmp_6 * m20 + tmp_9 * m30));
  dst[6] = d * (tmp_3 * m00 + tmp_6 * m10 + tmp_11 * m30 - (tmp_2 * m00 + tmp_7 * m10 + tmp_10 * m30));
  dst[7] = d * (tmp_4 * m00 + tmp_9 * m10 + tmp_10 * m20 - (tmp_5 * m00 + tmp_8 * m10 + tmp_11 * m20));
  dst[8] = d * (tmp_12 * m13 + tmp_15 * m23 + tmp_16 * m33 - (tmp_13 * m13 + tmp_14 * m23 + tmp_17 * m33));
  dst[9] = d * (tmp_13 * m03 + tmp_18 * m23 + tmp_21 * m33 - (tmp_12 * m03 + tmp_19 * m23 + tmp_20 * m33));
  dst[10] = d * (tmp_14 * m03 + tmp_19 * m13 + tmp_22 * m33 - (tmp_15 * m03 + tmp_18 * m13 + tmp_23 * m33));
  dst[11] = d * (tmp_17 * m03 + tmp_20 * m13 + tmp_23 * m23 - (tmp_16 * m03 + tmp_21 * m13 + tmp_22 * m23));
  dst[12] = d * (tmp_14 * m22 + tmp_17 * m32 + tmp_13 * m12 - (tmp_16 * m32 + tmp_12 * m12 + tmp_15 * m22));
  dst[13] = d * (tmp_20 * m32 + tmp_12 * m02 + tmp_19 * m22 - (tmp_18 * m22 + tmp_21 * m32 + tmp_13 * m02));
  dst[14] = d * (tmp_18 * m12 + tmp_23 * m32 + tmp_15 * m02 - (tmp_22 * m32 + tmp_14 * m02 + tmp_19 * m12));
  dst[15] = d * (tmp_22 * m22 + tmp_16 * m02 + tmp_21 * m12 - (tmp_20 * m12 + tmp_23 * m22 + tmp_17 * m02));
  return dst;
}
/**
 * Multiplies two 4-by-4 matrices with a on the left and b on the right
 * @param {module:twgl/m4.Mat4} a The matrix on the left.
 * @param {module:twgl/m4.Mat4} b The matrix on the right.
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The matrix product of a and b.
 * @memberOf module:twgl/m4
 */


function multiply$1(a, b, dst) {
  dst = dst || new MatType(16);
  const a00 = a[0];
  const a01 = a[1];
  const a02 = a[2];
  const a03 = a[3];
  const a10 = a[4 + 0];
  const a11 = a[4 + 1];
  const a12 = a[4 + 2];
  const a13 = a[4 + 3];
  const a20 = a[8 + 0];
  const a21 = a[8 + 1];
  const a22 = a[8 + 2];
  const a23 = a[8 + 3];
  const a30 = a[12 + 0];
  const a31 = a[12 + 1];
  const a32 = a[12 + 2];
  const a33 = a[12 + 3];
  const b00 = b[0];
  const b01 = b[1];
  const b02 = b[2];
  const b03 = b[3];
  const b10 = b[4 + 0];
  const b11 = b[4 + 1];
  const b12 = b[4 + 2];
  const b13 = b[4 + 3];
  const b20 = b[8 + 0];
  const b21 = b[8 + 1];
  const b22 = b[8 + 2];
  const b23 = b[8 + 3];
  const b30 = b[12 + 0];
  const b31 = b[12 + 1];
  const b32 = b[12 + 2];
  const b33 = b[12 + 3];
  dst[0] = a00 * b00 + a10 * b01 + a20 * b02 + a30 * b03;
  dst[1] = a01 * b00 + a11 * b01 + a21 * b02 + a31 * b03;
  dst[2] = a02 * b00 + a12 * b01 + a22 * b02 + a32 * b03;
  dst[3] = a03 * b00 + a13 * b01 + a23 * b02 + a33 * b03;
  dst[4] = a00 * b10 + a10 * b11 + a20 * b12 + a30 * b13;
  dst[5] = a01 * b10 + a11 * b11 + a21 * b12 + a31 * b13;
  dst[6] = a02 * b10 + a12 * b11 + a22 * b12 + a32 * b13;
  dst[7] = a03 * b10 + a13 * b11 + a23 * b12 + a33 * b13;
  dst[8] = a00 * b20 + a10 * b21 + a20 * b22 + a30 * b23;
  dst[9] = a01 * b20 + a11 * b21 + a21 * b22 + a31 * b23;
  dst[10] = a02 * b20 + a12 * b21 + a22 * b22 + a32 * b23;
  dst[11] = a03 * b20 + a13 * b21 + a23 * b22 + a33 * b23;
  dst[12] = a00 * b30 + a10 * b31 + a20 * b32 + a30 * b33;
  dst[13] = a01 * b30 + a11 * b31 + a21 * b32 + a31 * b33;
  dst[14] = a02 * b30 + a12 * b31 + a22 * b32 + a32 * b33;
  dst[15] = a03 * b30 + a13 * b31 + a23 * b32 + a33 * b33;
  return dst;
}
/**
 * Sets the translation component of a 4-by-4 matrix to the given
 * vector.
 * @param {module:twgl/m4.Mat4} a The matrix.
 * @param {module:twgl/v3.Vec3} v The vector.
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The matrix with translation set.
 * @memberOf module:twgl/m4
 */


function setTranslation(a, v, dst) {
  dst = dst || identity();

  if (a !== dst) {
    dst[0] = a[0];
    dst[1] = a[1];
    dst[2] = a[2];
    dst[3] = a[3];
    dst[4] = a[4];
    dst[5] = a[5];
    dst[6] = a[6];
    dst[7] = a[7];
    dst[8] = a[8];
    dst[9] = a[9];
    dst[10] = a[10];
    dst[11] = a[11];
  }

  dst[12] = v[0];
  dst[13] = v[1];
  dst[14] = v[2];
  dst[15] = 1;
  return dst;
}
/**
 * Returns the translation component of a 4-by-4 matrix as a vector with 3
 * entries.
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not passed a new one is created.
 * @return {module:twgl/v3.Vec3} The translation component of m.
 * @memberOf module:twgl/m4
 */


function getTranslation(m, dst) {
  dst = dst || create();
  dst[0] = m[12];
  dst[1] = m[13];
  dst[2] = m[14];
  return dst;
}
/**
 * Returns an axis of a 4x4 matrix as a vector with 3 entries
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {number} axis The axis 0 = x, 1 = y, 2 = z;
 * @return {module:twgl/v3.Vec3} [dst] vector.
 * @return {module:twgl/v3.Vec3} The axis component of m.
 * @memberOf module:twgl/m4
 */


function getAxis(m, axis, dst) {
  dst = dst || create();
  const off = axis * 4;
  dst[0] = m[off + 0];
  dst[1] = m[off + 1];
  dst[2] = m[off + 2];
  return dst;
}
/**
 * Sets an axis of a 4x4 matrix as a vector with 3 entries
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {module:twgl/v3.Vec3} v the axis vector
 * @param {number} axis The axis  0 = x, 1 = y, 2 = z;
 * @param {module:twgl/m4.Mat4} [dst] The matrix to set. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The matrix with axis set.
 * @memberOf module:twgl/m4
 */


function setAxis(a, v, axis, dst) {
  if (dst !== a) {
    dst = copy$1(a, dst);
  }

  const off = axis * 4;
  dst[off + 0] = v[0];
  dst[off + 1] = v[1];
  dst[off + 2] = v[2];
  return dst;
}
/**
 * Computes a 4-by-4 perspective transformation matrix given the angular height
 * of the frustum, the aspect ratio, and the near and far clipping planes.  The
 * arguments define a frustum extending in the negative z direction.  The given
 * angle is the vertical angle of the frustum, and the horizontal angle is
 * determined to produce the given aspect ratio.  The arguments near and far are
 * the distances to the near and far clipping planes.  Note that near and far
 * are not z coordinates, but rather they are distances along the negative
 * z-axis.  The matrix generated sends the viewing frustum to the unit box.
 * We assume a unit box extending from -1 to 1 in the x and y dimensions and
 * from 0 to 1 in the z dimension.
 * @param {number} fieldOfViewYInRadians The camera angle from top to bottom (in radians).
 * @param {number} aspect The aspect ratio width / height.
 * @param {number} zNear The depth (negative z coordinate)
 *     of the near clipping plane.
 * @param {number} zFar The depth (negative z coordinate)
 *     of the far clipping plane.
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The perspective matrix.
 * @memberOf module:twgl/m4
 */


function perspective(fieldOfViewYInRadians, aspect, zNear, zFar, dst) {
  dst = dst || new MatType(16);
  const f = Math.tan(Math.PI * 0.5 - 0.5 * fieldOfViewYInRadians);
  const rangeInv = 1.0 / (zNear - zFar);
  dst[0] = f / aspect;
  dst[1] = 0;
  dst[2] = 0;
  dst[3] = 0;
  dst[4] = 0;
  dst[5] = f;
  dst[6] = 0;
  dst[7] = 0;
  dst[8] = 0;
  dst[9] = 0;
  dst[10] = (zNear + zFar) * rangeInv;
  dst[11] = -1;
  dst[12] = 0;
  dst[13] = 0;
  dst[14] = zNear * zFar * rangeInv * 2;
  dst[15] = 0;
  return dst;
}
/**
 * Computes a 4-by-4 orthogonal transformation matrix given the left, right,
 * bottom, and top dimensions of the near clipping plane as well as the
 * near and far clipping plane distances.
 * @param {number} left Left side of the near clipping plane viewport.
 * @param {number} right Right side of the near clipping plane viewport.
 * @param {number} bottom Bottom of the near clipping plane viewport.
 * @param {number} top Top of the near clipping plane viewport.
 * @param {number} near The depth (negative z coordinate)
 *     of the near clipping plane.
 * @param {number} far The depth (negative z coordinate)
 *     of the far clipping plane.
 * @param {module:twgl/m4.Mat4} [dst] Output matrix. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The perspective matrix.
 * @memberOf module:twgl/m4
 */


function ortho(left, right, bottom, top, near, far, dst) {
  dst = dst || new MatType(16);
  dst[0] = 2 / (right - left);
  dst[1] = 0;
  dst[2] = 0;
  dst[3] = 0;
  dst[4] = 0;
  dst[5] = 2 / (top - bottom);
  dst[6] = 0;
  dst[7] = 0;
  dst[8] = 0;
  dst[9] = 0;
  dst[10] = 2 / (near - far);
  dst[11] = 0;
  dst[12] = (right + left) / (left - right);
  dst[13] = (top + bottom) / (bottom - top);
  dst[14] = (far + near) / (near - far);
  dst[15] = 1;
  return dst;
}
/**
 * Computes a 4-by-4 perspective transformation matrix given the left, right,
 * top, bottom, near and far clipping planes. The arguments define a frustum
 * extending in the negative z direction. The arguments near and far are the
 * distances to the near and far clipping planes. Note that near and far are not
 * z coordinates, but rather they are distances along the negative z-axis. The
 * matrix generated sends the viewing frustum to the unit box. We assume a unit
 * box extending from -1 to 1 in the x and y dimensions and from 0 to 1 in the z
 * dimension.
 * @param {number} left The x coordinate of the left plane of the box.
 * @param {number} right The x coordinate of the right plane of the box.
 * @param {number} bottom The y coordinate of the bottom plane of the box.
 * @param {number} top The y coordinate of the right plane of the box.
 * @param {number} near The negative z coordinate of the near plane of the box.
 * @param {number} far The negative z coordinate of the far plane of the box.
 * @param {module:twgl/m4.Mat4} [dst] Output matrix. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The perspective projection matrix.
 * @memberOf module:twgl/m4
 */


function frustum(left, right, bottom, top, near, far, dst) {
  dst = dst || new MatType(16);
  const dx = right - left;
  const dy = top - bottom;
  const dz = near - far;
  dst[0] = 2 * near / dx;
  dst[1] = 0;
  dst[2] = 0;
  dst[3] = 0;
  dst[4] = 0;
  dst[5] = 2 * near / dy;
  dst[6] = 0;
  dst[7] = 0;
  dst[8] = (left + right) / dx;
  dst[9] = (top + bottom) / dy;
  dst[10] = far / dz;
  dst[11] = -1;
  dst[12] = 0;
  dst[13] = 0;
  dst[14] = near * far / dz;
  dst[15] = 0;
  return dst;
}

let xAxis;
let yAxis;
let zAxis;
/**
 * Computes a 4-by-4 look-at transformation.
 *
 * This is a matrix which positions the camera itself. If you want
 * a view matrix (a matrix which moves things in front of the camera)
 * take the inverse of this.
 *
 * @param {module:twgl/v3.Vec3} eye The position of the eye.
 * @param {module:twgl/v3.Vec3} target The position meant to be viewed.
 * @param {module:twgl/v3.Vec3} up A vector pointing up.
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The look-at matrix.
 * @memberOf module:twgl/m4
 */

function lookAt(eye, target, up, dst) {
  dst = dst || new MatType(16);
  xAxis = xAxis || create();
  yAxis = yAxis || create();
  zAxis = zAxis || create();
  normalize(subtract(eye, target, zAxis), zAxis);
  normalize(cross(up, zAxis, xAxis), xAxis);
  normalize(cross(zAxis, xAxis, yAxis), yAxis);
  dst[0] = xAxis[0];
  dst[1] = xAxis[1];
  dst[2] = xAxis[2];
  dst[3] = 0;
  dst[4] = yAxis[0];
  dst[5] = yAxis[1];
  dst[6] = yAxis[2];
  dst[7] = 0;
  dst[8] = zAxis[0];
  dst[9] = zAxis[1];
  dst[10] = zAxis[2];
  dst[11] = 0;
  dst[12] = eye[0];
  dst[13] = eye[1];
  dst[14] = eye[2];
  dst[15] = 1;
  return dst;
}
/**
 * Creates a 4-by-4 matrix which translates by the given vector v.
 * @param {module:twgl/v3.Vec3} v The vector by
 *     which to translate.
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The translation matrix.
 * @memberOf module:twgl/m4
 */


function translation(v, dst) {
  dst = dst || new MatType(16);
  dst[0] = 1;
  dst[1] = 0;
  dst[2] = 0;
  dst[3] = 0;
  dst[4] = 0;
  dst[5] = 1;
  dst[6] = 0;
  dst[7] = 0;
  dst[8] = 0;
  dst[9] = 0;
  dst[10] = 1;
  dst[11] = 0;
  dst[12] = v[0];
  dst[13] = v[1];
  dst[14] = v[2];
  dst[15] = 1;
  return dst;
}
/**
 * Translates the given 4-by-4 matrix by the given vector v.
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {module:twgl/v3.Vec3} v The vector by
 *     which to translate.
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The translated matrix.
 * @memberOf module:twgl/m4
 */


function translate(m, v, dst) {
  dst = dst || new MatType(16);
  const v0 = v[0];
  const v1 = v[1];
  const v2 = v[2];
  const m00 = m[0];
  const m01 = m[1];
  const m02 = m[2];
  const m03 = m[3];
  const m10 = m[1 * 4 + 0];
  const m11 = m[1 * 4 + 1];
  const m12 = m[1 * 4 + 2];
  const m13 = m[1 * 4 + 3];
  const m20 = m[2 * 4 + 0];
  const m21 = m[2 * 4 + 1];
  const m22 = m[2 * 4 + 2];
  const m23 = m[2 * 4 + 3];
  const m30 = m[3 * 4 + 0];
  const m31 = m[3 * 4 + 1];
  const m32 = m[3 * 4 + 2];
  const m33 = m[3 * 4 + 3];

  if (m !== dst) {
    dst[0] = m00;
    dst[1] = m01;
    dst[2] = m02;
    dst[3] = m03;
    dst[4] = m10;
    dst[5] = m11;
    dst[6] = m12;
    dst[7] = m13;
    dst[8] = m20;
    dst[9] = m21;
    dst[10] = m22;
    dst[11] = m23;
  }

  dst[12] = m00 * v0 + m10 * v1 + m20 * v2 + m30;
  dst[13] = m01 * v0 + m11 * v1 + m21 * v2 + m31;
  dst[14] = m02 * v0 + m12 * v1 + m22 * v2 + m32;
  dst[15] = m03 * v0 + m13 * v1 + m23 * v2 + m33;
  return dst;
}
/**
 * Creates a 4-by-4 matrix which rotates around the x-axis by the given angle.
 * @param {number} angleInRadians The angle by which to rotate (in radians).
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The rotation matrix.
 * @memberOf module:twgl/m4
 */


function rotationX(angleInRadians, dst) {
  dst = dst || new MatType(16);
  const c = Math.cos(angleInRadians);
  const s = Math.sin(angleInRadians);
  dst[0] = 1;
  dst[1] = 0;
  dst[2] = 0;
  dst[3] = 0;
  dst[4] = 0;
  dst[5] = c;
  dst[6] = s;
  dst[7] = 0;
  dst[8] = 0;
  dst[9] = -s;
  dst[10] = c;
  dst[11] = 0;
  dst[12] = 0;
  dst[13] = 0;
  dst[14] = 0;
  dst[15] = 1;
  return dst;
}
/**
 * Rotates the given 4-by-4 matrix around the x-axis by the given
 * angle.
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {number} angleInRadians The angle by which to rotate (in radians).
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The rotated matrix.
 * @memberOf module:twgl/m4
 */


function rotateX(m, angleInRadians, dst) {
  dst = dst || new MatType(16);
  const m10 = m[4];
  const m11 = m[5];
  const m12 = m[6];
  const m13 = m[7];
  const m20 = m[8];
  const m21 = m[9];
  const m22 = m[10];
  const m23 = m[11];
  const c = Math.cos(angleInRadians);
  const s = Math.sin(angleInRadians);
  dst[4] = c * m10 + s * m20;
  dst[5] = c * m11 + s * m21;
  dst[6] = c * m12 + s * m22;
  dst[7] = c * m13 + s * m23;
  dst[8] = c * m20 - s * m10;
  dst[9] = c * m21 - s * m11;
  dst[10] = c * m22 - s * m12;
  dst[11] = c * m23 - s * m13;

  if (m !== dst) {
    dst[0] = m[0];
    dst[1] = m[1];
    dst[2] = m[2];
    dst[3] = m[3];
    dst[12] = m[12];
    dst[13] = m[13];
    dst[14] = m[14];
    dst[15] = m[15];
  }

  return dst;
}
/**
 * Creates a 4-by-4 matrix which rotates around the y-axis by the given angle.
 * @param {number} angleInRadians The angle by which to rotate (in radians).
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The rotation matrix.
 * @memberOf module:twgl/m4
 */


function rotationY(angleInRadians, dst) {
  dst = dst || new MatType(16);
  const c = Math.cos(angleInRadians);
  const s = Math.sin(angleInRadians);
  dst[0] = c;
  dst[1] = 0;
  dst[2] = -s;
  dst[3] = 0;
  dst[4] = 0;
  dst[5] = 1;
  dst[6] = 0;
  dst[7] = 0;
  dst[8] = s;
  dst[9] = 0;
  dst[10] = c;
  dst[11] = 0;
  dst[12] = 0;
  dst[13] = 0;
  dst[14] = 0;
  dst[15] = 1;
  return dst;
}
/**
 * Rotates the given 4-by-4 matrix around the y-axis by the given
 * angle.
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {number} angleInRadians The angle by which to rotate (in radians).
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The rotated matrix.
 * @memberOf module:twgl/m4
 */


function rotateY(m, angleInRadians, dst) {
  dst = dst || new MatType(16);
  const m00 = m[0 * 4 + 0];
  const m01 = m[0 * 4 + 1];
  const m02 = m[0 * 4 + 2];
  const m03 = m[0 * 4 + 3];
  const m20 = m[2 * 4 + 0];
  const m21 = m[2 * 4 + 1];
  const m22 = m[2 * 4 + 2];
  const m23 = m[2 * 4 + 3];
  const c = Math.cos(angleInRadians);
  const s = Math.sin(angleInRadians);
  dst[0] = c * m00 - s * m20;
  dst[1] = c * m01 - s * m21;
  dst[2] = c * m02 - s * m22;
  dst[3] = c * m03 - s * m23;
  dst[8] = c * m20 + s * m00;
  dst[9] = c * m21 + s * m01;
  dst[10] = c * m22 + s * m02;
  dst[11] = c * m23 + s * m03;

  if (m !== dst) {
    dst[4] = m[4];
    dst[5] = m[5];
    dst[6] = m[6];
    dst[7] = m[7];
    dst[12] = m[12];
    dst[13] = m[13];
    dst[14] = m[14];
    dst[15] = m[15];
  }

  return dst;
}
/**
 * Creates a 4-by-4 matrix which rotates around the z-axis by the given angle.
 * @param {number} angleInRadians The angle by which to rotate (in radians).
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The rotation matrix.
 * @memberOf module:twgl/m4
 */


function rotationZ(angleInRadians, dst) {
  dst = dst || new MatType(16);
  const c = Math.cos(angleInRadians);
  const s = Math.sin(angleInRadians);
  dst[0] = c;
  dst[1] = s;
  dst[2] = 0;
  dst[3] = 0;
  dst[4] = -s;
  dst[5] = c;
  dst[6] = 0;
  dst[7] = 0;
  dst[8] = 0;
  dst[9] = 0;
  dst[10] = 1;
  dst[11] = 0;
  dst[12] = 0;
  dst[13] = 0;
  dst[14] = 0;
  dst[15] = 1;
  return dst;
}
/**
 * Rotates the given 4-by-4 matrix around the z-axis by the given
 * angle.
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {number} angleInRadians The angle by which to rotate (in radians).
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The rotated matrix.
 * @memberOf module:twgl/m4
 */


function rotateZ(m, angleInRadians, dst) {
  dst = dst || new MatType(16);
  const m00 = m[0 * 4 + 0];
  const m01 = m[0 * 4 + 1];
  const m02 = m[0 * 4 + 2];
  const m03 = m[0 * 4 + 3];
  const m10 = m[1 * 4 + 0];
  const m11 = m[1 * 4 + 1];
  const m12 = m[1 * 4 + 2];
  const m13 = m[1 * 4 + 3];
  const c = Math.cos(angleInRadians);
  const s = Math.sin(angleInRadians);
  dst[0] = c * m00 + s * m10;
  dst[1] = c * m01 + s * m11;
  dst[2] = c * m02 + s * m12;
  dst[3] = c * m03 + s * m13;
  dst[4] = c * m10 - s * m00;
  dst[5] = c * m11 - s * m01;
  dst[6] = c * m12 - s * m02;
  dst[7] = c * m13 - s * m03;

  if (m !== dst) {
    dst[8] = m[8];
    dst[9] = m[9];
    dst[10] = m[10];
    dst[11] = m[11];
    dst[12] = m[12];
    dst[13] = m[13];
    dst[14] = m[14];
    dst[15] = m[15];
  }

  return dst;
}
/**
 * Creates a 4-by-4 matrix which rotates around the given axis by the given
 * angle.
 * @param {module:twgl/v3.Vec3} axis The axis
 *     about which to rotate.
 * @param {number} angleInRadians The angle by which to rotate (in radians).
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} A matrix which rotates angle radians
 *     around the axis.
 * @memberOf module:twgl/m4
 */


function axisRotation(axis, angleInRadians, dst) {
  dst = dst || new MatType(16);
  let x = axis[0];
  let y = axis[1];
  let z = axis[2];
  const n = Math.sqrt(x * x + y * y + z * z);
  x /= n;
  y /= n;
  z /= n;
  const xx = x * x;
  const yy = y * y;
  const zz = z * z;
  const c = Math.cos(angleInRadians);
  const s = Math.sin(angleInRadians);
  const oneMinusCosine = 1 - c;
  dst[0] = xx + (1 - xx) * c;
  dst[1] = x * y * oneMinusCosine + z * s;
  dst[2] = x * z * oneMinusCosine - y * s;
  dst[3] = 0;
  dst[4] = x * y * oneMinusCosine - z * s;
  dst[5] = yy + (1 - yy) * c;
  dst[6] = y * z * oneMinusCosine + x * s;
  dst[7] = 0;
  dst[8] = x * z * oneMinusCosine + y * s;
  dst[9] = y * z * oneMinusCosine - x * s;
  dst[10] = zz + (1 - zz) * c;
  dst[11] = 0;
  dst[12] = 0;
  dst[13] = 0;
  dst[14] = 0;
  dst[15] = 1;
  return dst;
}
/**
 * Rotates the given 4-by-4 matrix around the given axis by the
 * given angle.
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {module:twgl/v3.Vec3} axis The axis
 *     about which to rotate.
 * @param {number} angleInRadians The angle by which to rotate (in radians).
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The rotated matrix.
 * @memberOf module:twgl/m4
 */


function axisRotate(m, axis, angleInRadians, dst) {
  dst = dst || new MatType(16);
  let x = axis[0];
  let y = axis[1];
  let z = axis[2];
  const n = Math.sqrt(x * x + y * y + z * z);
  x /= n;
  y /= n;
  z /= n;
  const xx = x * x;
  const yy = y * y;
  const zz = z * z;
  const c = Math.cos(angleInRadians);
  const s = Math.sin(angleInRadians);
  const oneMinusCosine = 1 - c;
  const r00 = xx + (1 - xx) * c;
  const r01 = x * y * oneMinusCosine + z * s;
  const r02 = x * z * oneMinusCosine - y * s;
  const r10 = x * y * oneMinusCosine - z * s;
  const r11 = yy + (1 - yy) * c;
  const r12 = y * z * oneMinusCosine + x * s;
  const r20 = x * z * oneMinusCosine + y * s;
  const r21 = y * z * oneMinusCosine - x * s;
  const r22 = zz + (1 - zz) * c;
  const m00 = m[0];
  const m01 = m[1];
  const m02 = m[2];
  const m03 = m[3];
  const m10 = m[4];
  const m11 = m[5];
  const m12 = m[6];
  const m13 = m[7];
  const m20 = m[8];
  const m21 = m[9];
  const m22 = m[10];
  const m23 = m[11];
  dst[0] = r00 * m00 + r01 * m10 + r02 * m20;
  dst[1] = r00 * m01 + r01 * m11 + r02 * m21;
  dst[2] = r00 * m02 + r01 * m12 + r02 * m22;
  dst[3] = r00 * m03 + r01 * m13 + r02 * m23;
  dst[4] = r10 * m00 + r11 * m10 + r12 * m20;
  dst[5] = r10 * m01 + r11 * m11 + r12 * m21;
  dst[6] = r10 * m02 + r11 * m12 + r12 * m22;
  dst[7] = r10 * m03 + r11 * m13 + r12 * m23;
  dst[8] = r20 * m00 + r21 * m10 + r22 * m20;
  dst[9] = r20 * m01 + r21 * m11 + r22 * m21;
  dst[10] = r20 * m02 + r21 * m12 + r22 * m22;
  dst[11] = r20 * m03 + r21 * m13 + r22 * m23;

  if (m !== dst) {
    dst[12] = m[12];
    dst[13] = m[13];
    dst[14] = m[14];
    dst[15] = m[15];
  }

  return dst;
}
/**
 * Creates a 4-by-4 matrix which scales in each dimension by an amount given by
 * the corresponding entry in the given vector; assumes the vector has three
 * entries.
 * @param {module:twgl/v3.Vec3} v A vector of
 *     three entries specifying the factor by which to scale in each dimension.
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The scaling matrix.
 * @memberOf module:twgl/m4
 */


function scaling(v, dst) {
  dst = dst || new MatType(16);
  dst[0] = v[0];
  dst[1] = 0;
  dst[2] = 0;
  dst[3] = 0;
  dst[4] = 0;
  dst[5] = v[1];
  dst[6] = 0;
  dst[7] = 0;
  dst[8] = 0;
  dst[9] = 0;
  dst[10] = v[2];
  dst[11] = 0;
  dst[12] = 0;
  dst[13] = 0;
  dst[14] = 0;
  dst[15] = 1;
  return dst;
}
/**
 * Scales the given 4-by-4 matrix in each dimension by an amount
 * given by the corresponding entry in the given vector; assumes the vector has
 * three entries.
 * @param {module:twgl/m4.Mat4} m The matrix to be modified.
 * @param {module:twgl/v3.Vec3} v A vector of three entries specifying the
 *     factor by which to scale in each dimension.
 * @param {module:twgl/m4.Mat4} [dst] matrix to hold result. If not passed a new one is created.
 * @return {module:twgl/m4.Mat4} The scaled matrix.
 * @memberOf module:twgl/m4
 */


function scale(m, v, dst) {
  dst = dst || new MatType(16);
  const v0 = v[0];
  const v1 = v[1];
  const v2 = v[2];
  dst[0] = v0 * m[0 * 4 + 0];
  dst[1] = v0 * m[0 * 4 + 1];
  dst[2] = v0 * m[0 * 4 + 2];
  dst[3] = v0 * m[0 * 4 + 3];
  dst[4] = v1 * m[1 * 4 + 0];
  dst[5] = v1 * m[1 * 4 + 1];
  dst[6] = v1 * m[1 * 4 + 2];
  dst[7] = v1 * m[1 * 4 + 3];
  dst[8] = v2 * m[2 * 4 + 0];
  dst[9] = v2 * m[2 * 4 + 1];
  dst[10] = v2 * m[2 * 4 + 2];
  dst[11] = v2 * m[2 * 4 + 3];

  if (m !== dst) {
    dst[12] = m[12];
    dst[13] = m[13];
    dst[14] = m[14];
    dst[15] = m[15];
  }

  return dst;
}
/**
 * Takes a 4-by-4 matrix and a vector with 3 entries,
 * interprets the vector as a point, transforms that point by the matrix, and
 * returns the result as a vector with 3 entries.
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {module:twgl/v3.Vec3} v The point.
 * @param {module:twgl/v3.Vec3} [dst] optional vec3 to store result. If not passed a new one is created.
 * @return {module:twgl/v3.Vec3} The transformed point.
 * @memberOf module:twgl/m4
 */


function transformPoint(m, v, dst) {
  dst = dst || create();
  const v0 = v[0];
  const v1 = v[1];
  const v2 = v[2];
  const d = v0 * m[0 * 4 + 3] + v1 * m[1 * 4 + 3] + v2 * m[2 * 4 + 3] + m[3 * 4 + 3];
  dst[0] = (v0 * m[0 * 4 + 0] + v1 * m[1 * 4 + 0] + v2 * m[2 * 4 + 0] + m[3 * 4 + 0]) / d;
  dst[1] = (v0 * m[0 * 4 + 1] + v1 * m[1 * 4 + 1] + v2 * m[2 * 4 + 1] + m[3 * 4 + 1]) / d;
  dst[2] = (v0 * m[0 * 4 + 2] + v1 * m[1 * 4 + 2] + v2 * m[2 * 4 + 2] + m[3 * 4 + 2]) / d;
  return dst;
}
/**
 * Takes a 4-by-4 matrix and a vector with 3 entries, interprets the vector as a
 * direction, transforms that direction by the matrix, and returns the result;
 * assumes the transformation of 3-dimensional space represented by the matrix
 * is parallel-preserving, i.e. any combination of rotation, scaling and
 * translation, but not a perspective distortion. Returns a vector with 3
 * entries.
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {module:twgl/v3.Vec3} v The direction.
 * @param {module:twgl/v3.Vec3} [dst] optional Vec3 to store result. If not passed a new one is created.
 * @return {module:twgl/v3.Vec3} The transformed direction.
 * @memberOf module:twgl/m4
 */


function transformDirection(m, v, dst) {
  dst = dst || create();
  const v0 = v[0];
  const v1 = v[1];
  const v2 = v[2];
  dst[0] = v0 * m[0 * 4 + 0] + v1 * m[1 * 4 + 0] + v2 * m[2 * 4 + 0];
  dst[1] = v0 * m[0 * 4 + 1] + v1 * m[1 * 4 + 1] + v2 * m[2 * 4 + 1];
  dst[2] = v0 * m[0 * 4 + 2] + v1 * m[1 * 4 + 2] + v2 * m[2 * 4 + 2];
  return dst;
}
/**
 * Takes a 4-by-4 matrix m and a vector v with 3 entries, interprets the vector
 * as a normal to a surface, and computes a vector which is normal upon
 * transforming that surface by the matrix. The effect of this function is the
 * same as transforming v (as a direction) by the inverse-transpose of m.  This
 * function assumes the transformation of 3-dimensional space represented by the
 * matrix is parallel-preserving, i.e. any combination of rotation, scaling and
 * translation, but not a perspective distortion.  Returns a vector with 3
 * entries.
 * @param {module:twgl/m4.Mat4} m The matrix.
 * @param {module:twgl/v3.Vec3} v The normal.
 * @param {module:twgl/v3.Vec3} [dst] The direction. If not passed a new one is created.
 * @return {module:twgl/v3.Vec3} The transformed normal.
 * @memberOf module:twgl/m4
 */


function transformNormal(m, v, dst) {
  dst = dst || create();
  const mi = inverse(m);
  const v0 = v[0];
  const v1 = v[1];
  const v2 = v[2];
  dst[0] = v0 * mi[0 * 4 + 0] + v1 * mi[0 * 4 + 1] + v2 * mi[0 * 4 + 2];
  dst[1] = v0 * mi[1 * 4 + 0] + v1 * mi[1 * 4 + 1] + v2 * mi[1 * 4 + 2];
  dst[2] = v0 * mi[2 * 4 + 0] + v1 * mi[2 * 4 + 1] + v2 * mi[2 * 4 + 2];
  return dst;
}

var m4 = /*#__PURE__*/Object.freeze({
  __proto__: null,
  axisRotate: axisRotate,
  axisRotation: axisRotation,
  copy: copy$1,
  frustum: frustum,
  getAxis: getAxis,
  getTranslation: getTranslation,
  identity: identity,
  inverse: inverse,
  lookAt: lookAt,
  multiply: multiply$1,
  negate: negate$1,
  ortho: ortho,
  perspective: perspective,
  rotateX: rotateX,
  rotateY: rotateY,
  rotateZ: rotateZ,
  rotationX: rotationX,
  rotationY: rotationY,
  rotationZ: rotationZ,
  scale: scale,
  scaling: scaling,
  setAxis: setAxis,
  setDefaultType: setDefaultType$1,
  setTranslation: setTranslation,
  transformDirection: transformDirection,
  transformNormal: transformNormal,
  transformPoint: transformPoint,
  translate: translate,
  translation: translation,
  transpose: transpose
});
/*
 * Copyright 2019 Gregg Tavares
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

/* DataType */

exports.m4 = m4;
const BYTE = 0x1400;
const UNSIGNED_BYTE = 0x1401;
const SHORT = 0x1402;
const UNSIGNED_SHORT = 0x1403;
const INT = 0x1404;
const UNSIGNED_INT = 0x1405;
const FLOAT = 0x1406;
const UNSIGNED_SHORT_4_4_4_4 = 0x8033;
const UNSIGNED_SHORT_5_5_5_1 = 0x8034;
const UNSIGNED_SHORT_5_6_5 = 0x8363;
const HALF_FLOAT = 0x140B;
const UNSIGNED_INT_2_10_10_10_REV = 0x8368;
const UNSIGNED_INT_10F_11F_11F_REV = 0x8C3B;
const UNSIGNED_INT_5_9_9_9_REV = 0x8C3E;
const FLOAT_32_UNSIGNED_INT_24_8_REV = 0x8DAD;
const UNSIGNED_INT_24_8 = 0x84FA;
const glTypeToTypedArray = {};
{
  const tt = glTypeToTypedArray;
  tt[BYTE] = Int8Array;
  tt[UNSIGNED_BYTE] = Uint8Array;
  tt[SHORT] = Int16Array;
  tt[UNSIGNED_SHORT] = Uint16Array;
  tt[INT] = Int32Array;
  tt[UNSIGNED_INT] = Uint32Array;
  tt[FLOAT] = Float32Array;
  tt[UNSIGNED_SHORT_4_4_4_4] = Uint16Array;
  tt[UNSIGNED_SHORT_5_5_5_1] = Uint16Array;
  tt[UNSIGNED_SHORT_5_6_5] = Uint16Array;
  tt[HALF_FLOAT] = Uint16Array;
  tt[UNSIGNED_INT_2_10_10_10_REV] = Uint32Array;
  tt[UNSIGNED_INT_10F_11F_11F_REV] = Uint32Array;
  tt[UNSIGNED_INT_5_9_9_9_REV] = Uint32Array;
  tt[FLOAT_32_UNSIGNED_INT_24_8_REV] = Uint32Array;
  tt[UNSIGNED_INT_24_8] = Uint32Array;
}
/**
 * Get the GL type for a typedArray
 * @param {ArrayBufferView} typedArray a typedArray
 * @return {number} the GL type for array. For example pass in an `Int8Array` and `gl.BYTE` will
 *   be returned. Pass in a `Uint32Array` and `gl.UNSIGNED_INT` will be returned
 * @memberOf module:twgl/typedArray
 */

function getGLTypeForTypedArray(typedArray) {
  if (typedArray instanceof Int8Array) {
    return BYTE;
  } // eslint-disable-line


  if (typedArray instanceof Uint8Array) {
    return UNSIGNED_BYTE;
  } // eslint-disable-line


  if (typedArray instanceof Uint8ClampedArray) {
    return UNSIGNED_BYTE;
  } // eslint-disable-line


  if (typedArray instanceof Int16Array) {
    return SHORT;
  } // eslint-disable-line


  if (typedArray instanceof Uint16Array) {
    return UNSIGNED_SHORT;
  } // eslint-disable-line


  if (typedArray instanceof Int32Array) {
    return INT;
  } // eslint-disable-line


  if (typedArray instanceof Uint32Array) {
    return UNSIGNED_INT;
  } // eslint-disable-line


  if (typedArray instanceof Float32Array) {
    return FLOAT;
  } // eslint-disable-line


  throw new Error('unsupported typed array type');
}
/**
 * Get the GL type for a typedArray type
 * @param {ArrayBufferView} typedArrayType a typedArray constructor
 * @return {number} the GL type for type. For example pass in `Int8Array` and `gl.BYTE` will
 *   be returned. Pass in `Uint32Array` and `gl.UNSIGNED_INT` will be returned
 * @memberOf module:twgl/typedArray
 */


function getGLTypeForTypedArrayType(typedArrayType) {
  if (typedArrayType === Int8Array) {
    return BYTE;
  } // eslint-disable-line


  if (typedArrayType === Uint8Array) {
    return UNSIGNED_BYTE;
  } // eslint-disable-line


  if (typedArrayType === Uint8ClampedArray) {
    return UNSIGNED_BYTE;
  } // eslint-disable-line


  if (typedArrayType === Int16Array) {
    return SHORT;
  } // eslint-disable-line


  if (typedArrayType === Uint16Array) {
    return UNSIGNED_SHORT;
  } // eslint-disable-line


  if (typedArrayType === Int32Array) {
    return INT;
  } // eslint-disable-line


  if (typedArrayType === Uint32Array) {
    return UNSIGNED_INT;
  } // eslint-disable-line


  if (typedArrayType === Float32Array) {
    return FLOAT;
  } // eslint-disable-line


  throw new Error('unsupported typed array type');
}
/**
 * Get the typed array constructor for a given GL type
 * @param {number} type the GL type. (eg: `gl.UNSIGNED_INT`)
 * @return {function} the constructor for a the corresponding typed array. (eg. `Uint32Array`).
 * @memberOf module:twgl/typedArray
 */


function getTypedArrayTypeForGLType(type) {
  const CTOR = glTypeToTypedArray[type];

  if (!CTOR) {
    throw new Error('unknown gl type');
  }

  return CTOR;
}

const isArrayBuffer = typeof SharedArrayBuffer !== 'undefined' ? function isArrayBufferOrSharedArrayBuffer(a) {
  return a && a.buffer && a.buffer.toString && (a.buffer.toString() === "[object ArrayBuffer]" || a.buffer.toString() === "[object SharedArrayBuffer]");
} : function isArrayBuffer(a) {
  return a && a.buffer && a.buffer.toString && a.buffer.toString() === "[object ArrayBuffer]";
};
exports.isArrayBuffer = isArrayBuffer;
var typedarrays = /*#__PURE__*/Object.freeze({
  __proto__: null,
  getGLTypeForTypedArray: getGLTypeForTypedArray,
  getGLTypeForTypedArrayType: getGLTypeForTypedArrayType,
  getTypedArrayTypeForGLType: getTypedArrayTypeForGLType,
  isArrayBuffer: isArrayBuffer
});
/*
 * Copyright 2019 Gregg Tavares
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

/* eslint no-console: "off" */

/**
 * Copy named properties
 *
 * @param {string[]} names names of properties to copy
 * @param {object} src object to copy properties from
 * @param {object} dst object to copy properties to
 * @private
 */

exports.typedarrays = typedarrays;

function copyNamedProperties(names, src, dst) {
  names.forEach(function (name) {
    const value = src[name];

    if (value !== undefined) {
      dst[name] = value;
    }
  });
}
/**
 * Copies properties from source to dest only if a matching key is in dest
 *
 * @param {Object.<string, ?>} src the source
 * @param {Object.<string, ?>} dst the dest
 * @private
 */


function copyExistingProperties(src, dst) {
  Object.keys(dst).forEach(function (key) {
    if (dst.hasOwnProperty(key) && src.hasOwnProperty(key)) {
      /* eslint no-prototype-builtins: 0 */
      dst[key] = src[key];
    }
  });
}

function error(...args) {
  console.error(...args);
}

function warn(...args) {
  console.warn(...args);
}

function isBuffer(gl, t) {
  return typeof WebGLBuffer !== 'undefined' && t instanceof WebGLBuffer;
}

function isRenderbuffer(gl, t) {
  return typeof WebGLRenderbuffer !== 'undefined' && t instanceof WebGLRenderbuffer;
}

function isShader(gl, t) {
  return typeof WebGLShader !== 'undefined' && t instanceof WebGLShader;
}

function isTexture(gl, t) {
  return typeof WebGLTexture !== 'undefined' && t instanceof WebGLTexture;
}

function isSampler(gl, t) {
  return typeof WebGLSampler !== 'undefined' && t instanceof WebGLSampler;
}
/*
 * Copyright 2019 Gregg Tavares
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */


const STATIC_DRAW = 0x88e4;
const ARRAY_BUFFER = 0x8892;
const ELEMENT_ARRAY_BUFFER = 0x8893;
const BUFFER_SIZE = 0x8764;
const BYTE$1 = 0x1400;
const UNSIGNED_BYTE$1 = 0x1401;
const SHORT$1 = 0x1402;
const UNSIGNED_SHORT$1 = 0x1403;
const INT$1 = 0x1404;
const UNSIGNED_INT$1 = 0x1405;
const FLOAT$1 = 0x1406;
const defaults = {
  attribPrefix: ""
};
/**
 * Sets the default attrib prefix
 *
 * When writing shaders I prefer to name attributes with `a_`, uniforms with `u_` and varyings with `v_`
 * as it makes it clear where they came from. But, when building geometry I prefer using un-prefixed names.
 *
 * In other words I'll create arrays of geometry like this
 *
 *     var arrays = {
 *       position: ...
 *       normal: ...
 *       texcoord: ...
 *     };
 *
 * But need those mapped to attributes and my attributes start with `a_`.
 *
 * @deprecated see {@link module:twgl.setDefaults}
 * @param {string} prefix prefix for attribs
 * @memberOf module:twgl/attributes
 */

function setAttributePrefix(prefix) {
  defaults.attribPrefix = prefix;
}

function setDefaults(newDefaults) {
  copyExistingProperties(newDefaults, defaults);
}

function setBufferFromTypedArray(gl, type, buffer, array, drawType) {
  gl.bindBuffer(type, buffer);
  gl.bufferData(type, array, drawType || STATIC_DRAW);
}
/**
 * Given typed array creates a WebGLBuffer and copies the typed array
 * into it.
 *
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext
 * @param {ArrayBuffer|SharedArrayBuffer|ArrayBufferView|WebGLBuffer} typedArray the typed array. Note: If a WebGLBuffer is passed in it will just be returned. No action will be taken
 * @param {number} [type] the GL bind type for the buffer. Default = `gl.ARRAY_BUFFER`.
 * @param {number} [drawType] the GL draw type for the buffer. Default = 'gl.STATIC_DRAW`.
 * @return {WebGLBuffer} the created WebGLBuffer
 * @memberOf module:twgl/attributes
 */


function createBufferFromTypedArray(gl, typedArray, type, drawType) {
  if (isBuffer(gl, typedArray)) {
    return typedArray;
  }

  type = type || ARRAY_BUFFER;
  const buffer = gl.createBuffer();
  setBufferFromTypedArray(gl, type, buffer, typedArray, drawType);
  return buffer;
}

function isIndices(name) {
  return name === "indices";
} // This is really just a guess. Though I can't really imagine using
// anything else? Maybe for some compression?


function getNormalizationForTypedArray(typedArray) {
  if (typedArray instanceof Int8Array) {
    return true;
  } // eslint-disable-line


  if (typedArray instanceof Uint8Array) {
    return true;
  } // eslint-disable-line


  return false;
} // This is really just a guess. Though I can't really imagine using
// anything else? Maybe for some compression?


function getNormalizationForTypedArrayType(typedArrayType) {
  if (typedArrayType === Int8Array) {
    return true;
  } // eslint-disable-line


  if (typedArrayType === Uint8Array) {
    return true;
  } // eslint-disable-line


  return false;
}

function getArray(array) {
  return array.length ? array : array.data;
}

const texcoordRE = /coord|texture/i;
const colorRE = /color|colour/i;

function guessNumComponentsFromName(name, length) {
  let numComponents;

  if (texcoordRE.test(name)) {
    numComponents = 2;
  } else if (colorRE.test(name)) {
    numComponents = 4;
  } else {
    numComponents = 3; // position, normals, indices ...
  }

  if (length % numComponents > 0) {
    throw new Error(`Can not guess numComponents for attribute '${name}'. Tried ${numComponents} but ${length} values is not evenly divisible by ${numComponents}. You should specify it.`);
  }

  return numComponents;
}

function getNumComponents(array, arrayName) {
  return array.numComponents || array.size || guessNumComponentsFromName(arrayName, getArray(array).length);
}

function makeTypedArray(array, name) {
  if (isArrayBuffer(array)) {
    return array;
  }

  if (isArrayBuffer(array.data)) {
    return array.data;
  }

  if (Array.isArray(array)) {
    array = {
      data: array
    };
  }

  let Type = array.type;

  if (!Type) {
    if (isIndices(name)) {
      Type = Uint16Array;
    } else {
      Type = Float32Array;
    }
  }

  return new Type(array.data);
}
/**
 * The info for an attribute. This is effectively just the arguments to `gl.vertexAttribPointer` plus the WebGLBuffer
 * for the attribute.
 *
 * @typedef {Object} AttribInfo
 * @property {number[]|ArrayBufferView} [value] a constant value for the attribute. Note: if this is set the attribute will be
 *    disabled and set to this constant value and all other values will be ignored.
 * @property {number} [numComponents] the number of components for this attribute.
 * @property {number} [size] synonym for `numComponents`.
 * @property {number} [type] the type of the attribute (eg. `gl.FLOAT`, `gl.UNSIGNED_BYTE`, etc...) Default = `gl.FLOAT`
 * @property {boolean} [normalize] whether or not to normalize the data. Default = false
 * @property {number} [offset] offset into buffer in bytes. Default = 0
 * @property {number} [stride] the stride in bytes per element. Default = 0
 * @property {number} [divisor] the divisor in instances. Default = undefined. Note: undefined = don't call gl.vertexAttribDivisor
 *    where as anything else = do call it with this value
 * @property {WebGLBuffer} buffer the buffer that contains the data for this attribute
 * @property {number} [drawType] the draw type passed to gl.bufferData. Default = gl.STATIC_DRAW
 * @memberOf module:twgl
 */

/**
 * Use this type of array spec when TWGL can't guess the type or number of components of an array
 * @typedef {Object} FullArraySpec
 * @property {number[]|ArrayBufferView} [value] a constant value for the attribute. Note: if this is set the attribute will be
 *    disabled and set to this constant value and all other values will be ignored.
 * @property {(number|number[]|ArrayBufferView)} data The data of the array. A number alone becomes the number of elements of type.
 * @property {number} [numComponents] number of components for `vertexAttribPointer`. Default is based on the name of the array.
 *    If `coord` is in the name assumes `numComponents = 2`.
 *    If `color` is in the name assumes `numComponents = 4`.
 *    otherwise assumes `numComponents = 3`
 * @property {constructor} [type] type. This is only used if `data` is a JavaScript array. It is the constructor for the typedarray. (eg. `Uint8Array`).
 * For example if you want colors in a `Uint8Array` you might have a `FullArraySpec` like `{ type: Uint8Array, data: [255,0,255,255, ...], }`.
 * @property {number} [size] synonym for `numComponents`.
 * @property {boolean} [normalize] normalize for `vertexAttribPointer`. Default is true if type is `Int8Array` or `Uint8Array` otherwise false.
 * @property {number} [stride] stride for `vertexAttribPointer`. Default = 0
 * @property {number} [offset] offset for `vertexAttribPointer`. Default = 0
 * @property {number} [divisor] divisor for `vertexAttribDivisor`. Default = undefined. Note: undefined = don't call gl.vertexAttribDivisor
 *    where as anything else = do call it with this value
 * @property {string} [attrib] name of attribute this array maps to. Defaults to same name as array prefixed by the default attribPrefix.
 * @property {string} [name] synonym for `attrib`.
 * @property {string} [attribName] synonym for `attrib`.
 * @property {WebGLBuffer} [buffer] Buffer to use for this attribute. This lets you use your own buffer
 *    but you will need to supply `numComponents` and `type`. You can effectively pass an `AttribInfo`
 *    to provide this. Example:
 *
 *         const bufferInfo1 = twgl.createBufferInfoFromArrays(gl, {
 *           position: [1, 2, 3, ... ],
 *         });
 *         const bufferInfo2 = twgl.createBufferInfoFromArrays(gl, {
 *           position: bufferInfo1.attribs.position,  // use the same buffer from bufferInfo1
 *         });
 *
 * @memberOf module:twgl
 */

/**
 * An individual array in {@link module:twgl.Arrays}
 *
 * When passed to {@link module:twgl.createBufferInfoFromArrays} if an ArraySpec is `number[]` or `ArrayBufferView`
 * the types will be guessed based on the name. `indices` will be `Uint16Array`, everything else will
 * be `Float32Array`. If an ArraySpec is a number it's the number of floats for an empty (zeroed) buffer.
 *
 * @typedef {(number|number[]|ArrayBufferView|module:twgl.FullArraySpec)} ArraySpec
 * @memberOf module:twgl
 */

/**
 * This is a JavaScript object of arrays by name. The names should match your shader's attributes. If your
 * attributes have a common prefix you can specify it by calling {@link module:twgl.setAttributePrefix}.
 *
 *     Bare JavaScript Arrays
 *
 *         var arrays = {
 *            position: [-1, 1, 0],
 *            normal: [0, 1, 0],
 *            ...
 *         }
 *
 *     Bare TypedArrays
 *
 *         var arrays = {
 *            position: new Float32Array([-1, 1, 0]),
 *            color: new Uint8Array([255, 128, 64, 255]),
 *            ...
 *         }
 *
 * *   Will guess at `numComponents` if not specified based on name.
 *
 *     If `coord` is in the name assumes `numComponents = 2`
 *
 *     If `color` is in the name assumes `numComponents = 4`
 *
 *     otherwise assumes `numComponents = 3`
 *
 * Objects with various fields. See {@link module:twgl.FullArraySpec}.
 *
 *     var arrays = {
 *       position: { numComponents: 3, data: [0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0], },
 *       texcoord: { numComponents: 2, data: [0, 0, 0, 1, 1, 0, 1, 1],                 },
 *       normal:   { numComponents: 3, data: [0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1],     },
 *       indices:  { numComponents: 3, data: [0, 1, 2, 1, 2, 3],                       },
 *     };
 *
 * @typedef {Object.<string, module:twgl.ArraySpec>} Arrays
 * @memberOf module:twgl
 */

/**
 * Creates a set of attribute data and WebGLBuffers from set of arrays
 *
 * Given
 *
 *      var arrays = {
 *        position: { numComponents: 3, data: [0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0], },
 *        texcoord: { numComponents: 2, data: [0, 0, 0, 1, 1, 0, 1, 1],                 },
 *        normal:   { numComponents: 3, data: [0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1],     },
 *        color:    { numComponents: 4, data: [255, 255, 255, 255, 255, 0, 0, 255, 0, 0, 255, 255], type: Uint8Array, },
 *        indices:  { numComponents: 3, data: [0, 1, 2, 1, 2, 3],                       },
 *      };
 *
 * returns something like
 *
 *      var attribs = {
 *        position: { numComponents: 3, type: gl.FLOAT,         normalize: false, buffer: WebGLBuffer, },
 *        texcoord: { numComponents: 2, type: gl.FLOAT,         normalize: false, buffer: WebGLBuffer, },
 *        normal:   { numComponents: 3, type: gl.FLOAT,         normalize: false, buffer: WebGLBuffer, },
 *        color:    { numComponents: 4, type: gl.UNSIGNED_BYTE, normalize: true,  buffer: WebGLBuffer, },
 *      };
 *
 * notes:
 *
 * *   Arrays can take various forms
 *
 *     Bare JavaScript Arrays
 *
 *         var arrays = {
 *            position: [-1, 1, 0],
 *            normal: [0, 1, 0],
 *            ...
 *         }
 *
 *     Bare TypedArrays
 *
 *         var arrays = {
 *            position: new Float32Array([-1, 1, 0]),
 *            color: new Uint8Array([255, 128, 64, 255]),
 *            ...
 *         }
 *
 * *   Will guess at `numComponents` if not specified based on name.
 *
 *     If `coord` is in the name assumes `numComponents = 2`
 *
 *     If `color` is in the name assumes `numComponents = 4`
 *
 *     otherwise assumes `numComponents = 3`
 *
 * @param {WebGLRenderingContext} gl The webgl rendering context.
 * @param {module:twgl.Arrays} arrays The arrays
 * @param {module:twgl.BufferInfo} [srcBufferInfo] a BufferInfo to copy from
 *   This lets you share buffers. Any arrays you supply will override
 *   the buffers from srcBufferInfo.
 * @return {Object.<string, module:twgl.AttribInfo>} the attribs
 * @memberOf module:twgl/attributes
 */


function createAttribsFromArrays(gl, arrays) {
  const attribs = {};
  Object.keys(arrays).forEach(function (arrayName) {
    if (!isIndices(arrayName)) {
      const array = arrays[arrayName];
      const attribName = array.attrib || array.name || array.attribName || defaults.attribPrefix + arrayName;

      if (array.value) {
        if (!Array.isArray(array.value) && !isArrayBuffer(array.value)) {
          throw new Error('array.value is not array or typedarray');
        }

        attribs[attribName] = {
          value: array.value
        };
      } else {
        let buffer;
        let type;
        let normalization;
        let numComponents;

        if (array.buffer && array.buffer instanceof WebGLBuffer) {
          buffer = array.buffer;
          numComponents = array.numComponents || array.size;
          type = array.type;
          normalization = array.normalize;
        } else if (typeof array === "number" || typeof array.data === "number") {
          const numValues = array.data || array;
          const arrayType = array.type || Float32Array;
          const numBytes = numValues * arrayType.BYTES_PER_ELEMENT;
          type = getGLTypeForTypedArrayType(arrayType);
          normalization = array.normalize !== undefined ? array.normalize : getNormalizationForTypedArrayType(arrayType);
          numComponents = array.numComponents || array.size || guessNumComponentsFromName(arrayName, numValues);
          buffer = gl.createBuffer();
          gl.bindBuffer(ARRAY_BUFFER, buffer);
          gl.bufferData(ARRAY_BUFFER, numBytes, array.drawType || STATIC_DRAW);
        } else {
          const typedArray = makeTypedArray(array, arrayName);
          buffer = createBufferFromTypedArray(gl, typedArray, undefined, array.drawType);
          type = getGLTypeForTypedArray(typedArray);
          normalization = array.normalize !== undefined ? array.normalize : getNormalizationForTypedArray(typedArray);
          numComponents = getNumComponents(array, arrayName);
        }

        attribs[attribName] = {
          buffer: buffer,
          numComponents: numComponents,
          type: type,
          normalize: normalization,
          stride: array.stride || 0,
          offset: array.offset || 0,
          divisor: array.divisor === undefined ? undefined : array.divisor,
          drawType: array.drawType
        };
      }
    }
  });
  gl.bindBuffer(ARRAY_BUFFER, null);
  return attribs;
}
/**
 * Sets the contents of a buffer attached to an attribInfo
 *
 * This is helper function to dynamically update a buffer.
 *
 * Let's say you make a bufferInfo
 *
 *     var arrays = {
 *        position: new Float32Array([0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0]),
 *        texcoord: new Float32Array([0, 0, 0, 1, 1, 0, 1, 1]),
 *        normal:   new Float32Array([0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1]),
 *        indices:  new Uint16Array([0, 1, 2, 1, 2, 3]),
 *     };
 *     var bufferInfo = twgl.createBufferInfoFromArrays(gl, arrays);
 *
 *  And you want to dynamically update the positions. You could do this
 *
 *     // assuming arrays.position has already been updated with new data.
 *     twgl.setAttribInfoBufferFromArray(gl, bufferInfo.attribs.position, arrays.position);
 *
 * @param {WebGLRenderingContext} gl
 * @param {AttribInfo} attribInfo The attribInfo who's buffer contents to set. NOTE: If you have an attribute prefix
 *   the name of the attribute will include the prefix.
 * @param {ArraySpec} array Note: it is arguably inefficient to pass in anything but a typed array because anything
 *    else will have to be converted to a typed array before it can be used by WebGL. During init time that
 *    inefficiency is usually not important but if you're updating data dynamically best to be efficient.
 * @param {number} [offset] an optional offset into the buffer. This is only an offset into the WebGL buffer
 *    not the array. To pass in an offset into the array itself use a typed array and create an `ArrayBufferView`
 *    for the portion of the array you want to use.
 *
 *        var someArray = new Float32Array(1000); // an array with 1000 floats
 *        var someSubArray = new Float32Array(someArray.buffer, offsetInBytes, sizeInUnits); // a view into someArray
 *
 *    Now you can pass `someSubArray` into setAttribInfoBufferFromArray`
 * @memberOf module:twgl/attributes
 */


function setAttribInfoBufferFromArray(gl, attribInfo, array, offset) {
  array = makeTypedArray(array);

  if (offset !== undefined) {
    gl.bindBuffer(ARRAY_BUFFER, attribInfo.buffer);
    gl.bufferSubData(ARRAY_BUFFER, offset, array);
  } else {
    setBufferFromTypedArray(gl, ARRAY_BUFFER, attribInfo.buffer, array, attribInfo.drawType);
  }
}

function getBytesPerValueForGLType(gl, type) {
  if (type === BYTE$1) return 1; // eslint-disable-line

  if (type === UNSIGNED_BYTE$1) return 1; // eslint-disable-line

  if (type === SHORT$1) return 2; // eslint-disable-line

  if (type === UNSIGNED_SHORT$1) return 2; // eslint-disable-line

  if (type === INT$1) return 4; // eslint-disable-line

  if (type === UNSIGNED_INT$1) return 4; // eslint-disable-line

  if (type === FLOAT$1) return 4; // eslint-disable-line

  return 0;
} // Tries to get the number of elements from a set of arrays.


const positionKeys = ['position', 'positions', 'a_position'];

function getNumElementsFromNonIndexedArrays(arrays) {
  let key;
  let ii;

  for (ii = 0; ii < positionKeys.length; ++ii) {
    key = positionKeys[ii];

    if (key in arrays) {
      break;
    }
  }

  if (ii === positionKeys.length) {
    key = Object.keys(arrays)[0];
  }

  const array = arrays[key];
  const length = getArray(array).length;
  const numComponents = getNumComponents(array, key);
  const numElements = length / numComponents;

  if (length % numComponents > 0) {
    throw new Error(`numComponents ${numComponents} not correct for length ${length}`);
  }

  return numElements;
}

function getNumElementsFromAttributes(gl, attribs) {
  let key;
  let ii;

  for (ii = 0; ii < positionKeys.length; ++ii) {
    key = positionKeys[ii];

    if (key in attribs) {
      break;
    }

    key = defaults.attribPrefix + key;

    if (key in attribs) {
      break;
    }
  }

  if (ii === positionKeys.length) {
    key = Object.keys(attribs)[0];
  }

  const attrib = attribs[key];
  gl.bindBuffer(ARRAY_BUFFER, attrib.buffer);
  const numBytes = gl.getBufferParameter(ARRAY_BUFFER, BUFFER_SIZE);
  gl.bindBuffer(ARRAY_BUFFER, null);
  const bytesPerValue = getBytesPerValueForGLType(gl, attrib.type);
  const totalElements = numBytes / bytesPerValue;
  const numComponents = attrib.numComponents || attrib.size; // TODO: check stride

  const numElements = totalElements / numComponents;

  if (numElements % 1 !== 0) {
    throw new Error(`numComponents ${numComponents} not correct for length ${length}`);
  }

  return numElements;
}
/**
 * @typedef {Object} BufferInfo
 * @property {number} numElements The number of elements to pass to `gl.drawArrays` or `gl.drawElements`.
 * @property {number} [elementType] The type of indices `UNSIGNED_BYTE`, `UNSIGNED_SHORT` etc..
 * @property {WebGLBuffer} [indices] The indices `ELEMENT_ARRAY_BUFFER` if any indices exist.
 * @property {Object.<string, module:twgl.AttribInfo>} [attribs] The attribs appropriate to call `setAttributes`
 * @memberOf module:twgl
 */

/**
 * Creates a BufferInfo from an object of arrays.
 *
 * This can be passed to {@link module:twgl.setBuffersAndAttributes} and to
 * {@link module:twgl:drawBufferInfo}.
 *
 * Given an object like
 *
 *     var arrays = {
 *       position: { numComponents: 3, data: [0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0], },
 *       texcoord: { numComponents: 2, data: [0, 0, 0, 1, 1, 0, 1, 1],                 },
 *       normal:   { numComponents: 3, data: [0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1],     },
 *       indices:  { numComponents: 3, data: [0, 1, 2, 1, 2, 3],                       },
 *     };
 *
 *  Creates an BufferInfo like this
 *
 *     bufferInfo = {
 *       numElements: 4,        // or whatever the number of elements is
 *       indices: WebGLBuffer,  // this property will not exist if there are no indices
 *       attribs: {
 *         position: { buffer: WebGLBuffer, numComponents: 3, },
 *         normal:   { buffer: WebGLBuffer, numComponents: 3, },
 *         texcoord: { buffer: WebGLBuffer, numComponents: 2, },
 *       },
 *     };
 *
 *  The properties of arrays can be JavaScript arrays in which case the number of components
 *  will be guessed.
 *
 *     var arrays = {
 *        position: [0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0],
 *        texcoord: [0, 0, 0, 1, 1, 0, 1, 1],
 *        normal:   [0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1],
 *        indices:  [0, 1, 2, 1, 2, 3],
 *     };
 *
 *  They can also be TypedArrays
 *
 *     var arrays = {
 *        position: new Float32Array([0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0]),
 *        texcoord: new Float32Array([0, 0, 0, 1, 1, 0, 1, 1]),
 *        normal:   new Float32Array([0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1]),
 *        indices:  new Uint16Array([0, 1, 2, 1, 2, 3]),
 *     };
 *
 *  Or AugmentedTypedArrays
 *
 *     var positions = createAugmentedTypedArray(3, 4);
 *     var texcoords = createAugmentedTypedArray(2, 4);
 *     var normals   = createAugmentedTypedArray(3, 4);
 *     var indices   = createAugmentedTypedArray(3, 2, Uint16Array);
 *
 *     positions.push([0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0]);
 *     texcoords.push([0, 0, 0, 1, 1, 0, 1, 1]);
 *     normals.push([0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1]);
 *     indices.push([0, 1, 2, 1, 2, 3]);
 *
 *     var arrays = {
 *        position: positions,
 *        texcoord: texcoords,
 *        normal:   normals,
 *        indices:  indices,
 *     };
 *
 * For the last example it is equivalent to
 *
 *     var bufferInfo = {
 *       attribs: {
 *         position: { numComponents: 3, buffer: gl.createBuffer(), },
 *         texcoord: { numComponents: 2, buffer: gl.createBuffer(), },
 *         normal: { numComponents: 3, buffer: gl.createBuffer(), },
 *       },
 *       indices: gl.createBuffer(),
 *       numElements: 6,
 *     };
 *
 *     gl.bindBuffer(gl.ARRAY_BUFFER, bufferInfo.attribs.position.buffer);
 *     gl.bufferData(gl.ARRAY_BUFFER, arrays.position, gl.STATIC_DRAW);
 *     gl.bindBuffer(gl.ARRAY_BUFFER, bufferInfo.attribs.texcoord.buffer);
 *     gl.bufferData(gl.ARRAY_BUFFER, arrays.texcoord, gl.STATIC_DRAW);
 *     gl.bindBuffer(gl.ARRAY_BUFFER, bufferInfo.attribs.normal.buffer);
 *     gl.bufferData(gl.ARRAY_BUFFER, arrays.normal, gl.STATIC_DRAW);
 *     gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, bufferInfo.indices);
 *     gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, arrays.indices, gl.STATIC_DRAW);
 *
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext
 * @param {module:twgl.Arrays} arrays Your data
 * @param {module:twgl.BufferInfo} [srcBufferInfo] An existing
 *        buffer info to start from. WebGLBuffers etc specified
 *        in the srcBufferInfo will be used in a new BufferInfo
 *        with any arrays specified overriding the ones in
 *        srcBufferInfo.
 * @return {module:twgl.BufferInfo} A BufferInfo
 * @memberOf module:twgl/attributes
 */


function createBufferInfoFromArrays(gl, arrays, srcBufferInfo) {
  const newAttribs = createAttribsFromArrays(gl, arrays);
  const bufferInfo = Object.assign({}, srcBufferInfo ? srcBufferInfo : {});
  bufferInfo.attribs = Object.assign({}, srcBufferInfo ? srcBufferInfo.attribs : {}, newAttribs);
  const indices = arrays.indices;

  if (indices) {
    const newIndices = makeTypedArray(indices, "indices");
    bufferInfo.indices = createBufferFromTypedArray(gl, newIndices, ELEMENT_ARRAY_BUFFER);
    bufferInfo.numElements = newIndices.length;
    bufferInfo.elementType = getGLTypeForTypedArray(newIndices);
  } else if (!bufferInfo.numElements) {
    bufferInfo.numElements = getNumElementsFromAttributes(gl, bufferInfo.attribs);
  }

  return bufferInfo;
}
/**
 * Creates a buffer from an array, typed array, or array spec
 *
 * Given something like this
 *
 *     [1, 2, 3],
 *
 * or
 *
 *     new Uint16Array([1,2,3]);
 *
 * or
 *
 *     {
 *        data: [1, 2, 3],
 *        type: Uint8Array,
 *     }
 *
 * returns a WebGLBuffer that contains the given data.
 *
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext.
 * @param {module:twgl.ArraySpec} array an array, typed array, or array spec.
 * @param {string} arrayName name of array. Used to guess the type if type can not be derived otherwise.
 * @return {WebGLBuffer} a WebGLBuffer containing the data in array.
 * @memberOf module:twgl/attributes
 */


function createBufferFromArray(gl, array, arrayName) {
  const type = arrayName === "indices" ? ELEMENT_ARRAY_BUFFER : ARRAY_BUFFER;
  const typedArray = makeTypedArray(array, arrayName);
  return createBufferFromTypedArray(gl, typedArray, type);
}
/**
 * Creates buffers from arrays or typed arrays
 *
 * Given something like this
 *
 *     var arrays = {
 *        positions: [1, 2, 3],
 *        normals: [0, 0, 1],
 *     }
 *
 * returns something like
 *
 *     buffers = {
 *       positions: WebGLBuffer,
 *       normals: WebGLBuffer,
 *     }
 *
 * If the buffer is named 'indices' it will be made an ELEMENT_ARRAY_BUFFER.
 *
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext.
 * @param {module:twgl.Arrays} arrays
 * @return {Object<string, WebGLBuffer>} returns an object with one WebGLBuffer per array
 * @memberOf module:twgl/attributes
 */


function createBuffersFromArrays(gl, arrays) {
  const buffers = {};
  Object.keys(arrays).forEach(function (key) {
    buffers[key] = createBufferFromArray(gl, arrays[key], key);
  }); // Ugh!

  if (arrays.indices) {
    buffers.numElements = arrays.indices.length;
    buffers.elementType = getGLTypeForTypedArray(makeTypedArray(arrays.indices));
  } else {
    buffers.numElements = getNumElementsFromNonIndexedArrays(arrays);
  }

  return buffers;
}

var attributes = /*#__PURE__*/Object.freeze({
  __proto__: null,
  createAttribsFromArrays: createAttribsFromArrays,
  createBuffersFromArrays: createBuffersFromArrays,
  createBufferFromArray: createBufferFromArray,
  createBufferFromTypedArray: createBufferFromTypedArray,
  createBufferInfoFromArrays: createBufferInfoFromArrays,
  setAttribInfoBufferFromArray: setAttribInfoBufferFromArray,
  setAttributePrefix: setAttributePrefix,
  setAttributeDefaults_: setDefaults,
  getNumComponents_: getNumComponents,
  getArray_: getArray
});
/*
 * Copyright 2019 Gregg Tavares
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

exports.attributes = attributes;
const getArray$1 = getArray; // eslint-disable-line

const getNumComponents$1 = getNumComponents; // eslint-disable-line

/**
 * @typedef {(Int8Array|Uint8Array|Int16Array|Uint16Array|Int32Array|Uint32Array|Float32Array)} TypedArray
 */

/**
 * Add `push` to a typed array. It just keeps a 'cursor'
 * and allows use to `push` values into the array so we
 * don't have to manually compute offsets
 * @param {TypedArray} typedArray TypedArray to augment
 * @param {number} numComponents number of components.
 * @private
 */

function augmentTypedArray(typedArray, numComponents) {
  let cursor = 0;

  typedArray.push = function () {
    for (let ii = 0; ii < arguments.length; ++ii) {
      const value = arguments[ii];

      if (value instanceof Array || isArrayBuffer(value)) {
        for (let jj = 0; jj < value.length; ++jj) {
          typedArray[cursor++] = value[jj];
        }
      } else {
        typedArray[cursor++] = value;
      }
    }
  };

  typedArray.reset = function (opt_index) {
    cursor = opt_index || 0;
  };

  typedArray.numComponents = numComponents;
  Object.defineProperty(typedArray, 'numElements', {
    get: function () {
      return this.length / this.numComponents | 0;
    }
  });
  return typedArray;
}
/**
 * creates a typed array with a `push` function attached
 * so that you can easily *push* values.
 *
 * `push` can take multiple arguments. If an argument is an array each element
 * of the array will be added to the typed array.
 *
 * Example:
 *
 *     const array = createAugmentedTypedArray(3, 2);  // creates a Float32Array with 6 values
 *     array.push(1, 2, 3);
 *     array.push([4, 5, 6]);
 *     // array now contains [1, 2, 3, 4, 5, 6]
 *
 * Also has `numComponents` and `numElements` properties.
 *
 * @param {number} numComponents number of components
 * @param {number} numElements number of elements. The total size of the array will be `numComponents * numElements`.
 * @param {constructor} opt_type A constructor for the type. Default = `Float32Array`.
 * @return {ArrayBufferView} A typed array.
 * @memberOf module:twgl/primitives
 */


function createAugmentedTypedArray(numComponents, numElements, opt_type) {
  const Type = opt_type || Float32Array;
  return augmentTypedArray(new Type(numComponents * numElements), numComponents);
}

function allButIndices(name) {
  return name !== "indices";
}
/**
 * Given indexed vertices creates a new set of vertices un-indexed by expanding the indexed vertices.
 * @param {Object.<string, TypedArray>} vertices The indexed vertices to deindex
 * @return {Object.<string, TypedArray>} The deindexed vertices
 * @memberOf module:twgl/primitives
 */


function deindexVertices(vertices) {
  const indices = vertices.indices;
  const newVertices = {};
  const numElements = indices.length;

  function expandToUnindexed(channel) {
    const srcBuffer = vertices[channel];
    const numComponents = srcBuffer.numComponents;
    const dstBuffer = createAugmentedTypedArray(numComponents, numElements, srcBuffer.constructor);

    for (let ii = 0; ii < numElements; ++ii) {
      const ndx = indices[ii];
      const offset = ndx * numComponents;

      for (let jj = 0; jj < numComponents; ++jj) {
        dstBuffer.push(srcBuffer[offset + jj]);
      }
    }

    newVertices[channel] = dstBuffer;
  }

  Object.keys(vertices).filter(allButIndices).forEach(expandToUnindexed);
  return newVertices;
}
/**
 * flattens the normals of deindexed vertices in place.
 * @param {Object.<string, TypedArray>} vertices The deindexed vertices who's normals to flatten
 * @return {Object.<string, TypedArray>} The flattened vertices (same as was passed in)
 * @memberOf module:twgl/primitives
 */


function flattenNormals(vertices) {
  if (vertices.indices) {
    throw new Error('can not flatten normals of indexed vertices. deindex them first');
  }

  const normals = vertices.normal;
  const numNormals = normals.length;

  for (let ii = 0; ii < numNormals; ii += 9) {
    // pull out the 3 normals for this triangle
    const nax = normals[ii + 0];
    const nay = normals[ii + 1];
    const naz = normals[ii + 2];
    const nbx = normals[ii + 3];
    const nby = normals[ii + 4];
    const nbz = normals[ii + 5];
    const ncx = normals[ii + 6];
    const ncy = normals[ii + 7];
    const ncz = normals[ii + 8]; // add them

    let nx = nax + nbx + ncx;
    let ny = nay + nby + ncy;
    let nz = naz + nbz + ncz; // normalize them

    const length = Math.sqrt(nx * nx + ny * ny + nz * nz);
    nx /= length;
    ny /= length;
    nz /= length; // copy them back in

    normals[ii + 0] = nx;
    normals[ii + 1] = ny;
    normals[ii + 2] = nz;
    normals[ii + 3] = nx;
    normals[ii + 4] = ny;
    normals[ii + 5] = nz;
    normals[ii + 6] = nx;
    normals[ii + 7] = ny;
    normals[ii + 8] = nz;
  }

  return vertices;
}

function applyFuncToV3Array(array, matrix, fn) {
  const len = array.length;
  const tmp = new Float32Array(3);

  for (let ii = 0; ii < len; ii += 3) {
    fn(matrix, [array[ii], array[ii + 1], array[ii + 2]], tmp);
    array[ii] = tmp[0];
    array[ii + 1] = tmp[1];
    array[ii + 2] = tmp[2];
  }
}

function transformNormal$1(mi, v, dst) {
  dst = dst || create();
  const v0 = v[0];
  const v1 = v[1];
  const v2 = v[2];
  dst[0] = v0 * mi[0 * 4 + 0] + v1 * mi[0 * 4 + 1] + v2 * mi[0 * 4 + 2];
  dst[1] = v0 * mi[1 * 4 + 0] + v1 * mi[1 * 4 + 1] + v2 * mi[1 * 4 + 2];
  dst[2] = v0 * mi[2 * 4 + 0] + v1 * mi[2 * 4 + 1] + v2 * mi[2 * 4 + 2];
  return dst;
}
/**
 * Reorients directions by the given matrix..
 * @param {(number[]|TypedArray)} array The array. Assumes value floats per element.
 * @param {module:twgl/m4.Mat4} matrix A matrix to multiply by.
 * @return {(number[]|TypedArray)} the same array that was passed in
 * @memberOf module:twgl/primitives
 */


function reorientDirections(array, matrix) {
  applyFuncToV3Array(array, matrix, transformDirection);
  return array;
}
/**
 * Reorients normals by the inverse-transpose of the given
 * matrix..
 * @param {(number[]|TypedArray)} array The array. Assumes value floats per element.
 * @param {module:twgl/m4.Mat4} matrix A matrix to multiply by.
 * @return {(number[]|TypedArray)} the same array that was passed in
 * @memberOf module:twgl/primitives
 */


function reorientNormals(array, matrix) {
  applyFuncToV3Array(array, inverse(matrix), transformNormal$1);
  return array;
}
/**
 * Reorients positions by the given matrix. In other words, it
 * multiplies each vertex by the given matrix.
 * @param {(number[]|TypedArray)} array The array. Assumes value floats per element.
 * @param {module:twgl/m4.Mat4} matrix A matrix to multiply by.
 * @return {(number[]|TypedArray)} the same array that was passed in
 * @memberOf module:twgl/primitives
 */


function reorientPositions(array, matrix) {
  applyFuncToV3Array(array, matrix, transformPoint);
  return array;
}
/**
 * @typedef {(number[]|TypedArray)} NativeArrayOrTypedArray
 */

/**
 * Reorients arrays by the given matrix. Assumes arrays have
 * names that contains 'pos' could be reoriented as positions,
 * 'binorm' or 'tan' as directions, and 'norm' as normals.
 *
 * @param {Object.<string, NativeArrayOrTypedArray>} arrays The vertices to reorient
 * @param {module:twgl/m4.Mat4} matrix matrix to reorient by.
 * @return {Object.<string, NativeArrayOrTypedArray>} same arrays that were passed in.
 * @memberOf module:twgl/primitives
 */


function reorientVertices(arrays, matrix) {
  Object.keys(arrays).forEach(function (name) {
    const array = arrays[name];

    if (name.indexOf("pos") >= 0) {
      reorientPositions(array, matrix);
    } else if (name.indexOf("tan") >= 0 || name.indexOf("binorm") >= 0) {
      reorientDirections(array, matrix);
    } else if (name.indexOf("norm") >= 0) {
      reorientNormals(array, matrix);
    }
  });
  return arrays;
}
/**
 * Creates XY quad BufferInfo
 *
 * The default with no parameters will return a 2x2 quad with values from -1 to +1.
 * If you want a unit quad with that goes from 0 to 1 you'd call it with
 *
 *     twgl.primitives.createXYQuadBufferInfo(gl, 1, 0.5, 0.5);
 *
 * If you want a unit quad centered above 0,0 you'd call it with
 *
 *     twgl.primitives.createXYQuadBufferInfo(gl, 1, 0, 0.5);
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} [size] the size across the quad. Defaults to 2 which means vertices will go from -1 to +1
 * @param {number} [xOffset] the amount to offset the quad in X
 * @param {number} [yOffset] the amount to offset the quad in Y
 * @return {Object.<string, WebGLBuffer>} the created XY Quad BufferInfo
 * @memberOf module:twgl/primitives
 * @function createXYQuadBuffers
 */

/**
 * Creates XY quad Buffers
 *
 * The default with no parameters will return a 2x2 quad with values from -1 to +1.
 * If you want a unit quad with that goes from 0 to 1 you'd call it with
 *
 *     twgl.primitives.createXYQuadBufferInfo(gl, 1, 0.5, 0.5);
 *
 * If you want a unit quad centered above 0,0 you'd call it with
 *
 *     twgl.primitives.createXYQuadBufferInfo(gl, 1, 0, 0.5);
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} [size] the size across the quad. Defaults to 2 which means vertices will go from -1 to +1
 * @param {number} [xOffset] the amount to offset the quad in X
 * @param {number} [yOffset] the amount to offset the quad in Y
 * @return {module:twgl.BufferInfo} the created XY Quad buffers
 * @memberOf module:twgl/primitives
 * @function createXYQuadBufferInfo
 */

/**
 * Creates XY quad vertices
 *
 * The default with no parameters will return a 2x2 quad with values from -1 to +1.
 * If you want a unit quad with that goes from 0 to 1 you'd call it with
 *
 *     twgl.primitives.createXYQuadVertices(1, 0.5, 0.5);
 *
 * If you want a unit quad centered above 0,0 you'd call it with
 *
 *     twgl.primitives.createXYQuadVertices(1, 0, 0.5);
 *
 * @param {number} [size] the size across the quad. Defaults to 2 which means vertices will go from -1 to +1
 * @param {number} [xOffset] the amount to offset the quad in X
 * @param {number} [yOffset] the amount to offset the quad in Y
 * @return {Object.<string, TypedArray>} the created XY Quad vertices
 * @memberOf module:twgl/primitives
 */


function createXYQuadVertices(size, xOffset, yOffset) {
  size = size || 2;
  xOffset = xOffset || 0;
  yOffset = yOffset || 0;
  size *= 0.5;
  return {
    position: {
      numComponents: 2,
      data: [xOffset + -1 * size, yOffset + -1 * size, xOffset + 1 * size, yOffset + -1 * size, xOffset + -1 * size, yOffset + 1 * size, xOffset + 1 * size, yOffset + 1 * size]
    },
    normal: [0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1],
    texcoord: [0, 0, 1, 0, 0, 1, 1, 1],
    indices: [0, 1, 2, 2, 1, 3]
  };
}
/**
 * Creates XZ plane BufferInfo.
 *
 * The created plane has position, normal, and texcoord data
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} [width] Width of the plane. Default = 1
 * @param {number} [depth] Depth of the plane. Default = 1
 * @param {number} [subdivisionsWidth] Number of steps across the plane. Default = 1
 * @param {number} [subdivisionsDepth] Number of steps down the plane. Default = 1
 * @param {module:twgl/m4.Mat4} [matrix] A matrix by which to multiply all the vertices.
 * @return {module:twgl.BufferInfo} The created plane BufferInfo.
 * @memberOf module:twgl/primitives
 * @function createPlaneBufferInfo
 */

/**
 * Creates XZ plane buffers.
 *
 * The created plane has position, normal, and texcoord data
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} [width] Width of the plane. Default = 1
 * @param {number} [depth] Depth of the plane. Default = 1
 * @param {number} [subdivisionsWidth] Number of steps across the plane. Default = 1
 * @param {number} [subdivisionsDepth] Number of steps down the plane. Default = 1
 * @param {module:twgl/m4.Mat4} [matrix] A matrix by which to multiply all the vertices.
 * @return {Object.<string, WebGLBuffer>} The created plane buffers.
 * @memberOf module:twgl/primitives
 * @function createPlaneBuffers
 */

/**
 * Creates XZ plane vertices.
 *
 * The created plane has position, normal, and texcoord data
 *
 * @param {number} [width] Width of the plane. Default = 1
 * @param {number} [depth] Depth of the plane. Default = 1
 * @param {number} [subdivisionsWidth] Number of steps across the plane. Default = 1
 * @param {number} [subdivisionsDepth] Number of steps down the plane. Default = 1
 * @param {module:twgl/m4.Mat4} [matrix] A matrix by which to multiply all the vertices.
 * @return {Object.<string, TypedArray>} The created plane vertices.
 * @memberOf module:twgl/primitives
 */


function createPlaneVertices(width, depth, subdivisionsWidth, subdivisionsDepth, matrix) {
  width = width || 1;
  depth = depth || 1;
  subdivisionsWidth = subdivisionsWidth || 1;
  subdivisionsDepth = subdivisionsDepth || 1;
  matrix = matrix || identity();
  const numVertices = (subdivisionsWidth + 1) * (subdivisionsDepth + 1);
  const positions = createAugmentedTypedArray(3, numVertices);
  const normals = createAugmentedTypedArray(3, numVertices);
  const texcoords = createAugmentedTypedArray(2, numVertices);

  for (let z = 0; z <= subdivisionsDepth; z++) {
    for (let x = 0; x <= subdivisionsWidth; x++) {
      const u = x / subdivisionsWidth;
      const v = z / subdivisionsDepth;
      positions.push(width * u - width * 0.5, 0, depth * v - depth * 0.5);
      normals.push(0, 1, 0);
      texcoords.push(u, v);
    }
  }

  const numVertsAcross = subdivisionsWidth + 1;
  const indices = createAugmentedTypedArray(3, subdivisionsWidth * subdivisionsDepth * 2, Uint16Array);

  for (let z = 0; z < subdivisionsDepth; z++) {
    // eslint-disable-line
    for (let x = 0; x < subdivisionsWidth; x++) {
      // eslint-disable-line
      // Make triangle 1 of quad.
      indices.push((z + 0) * numVertsAcross + x, (z + 1) * numVertsAcross + x, (z + 0) * numVertsAcross + x + 1); // Make triangle 2 of quad.

      indices.push((z + 1) * numVertsAcross + x, (z + 1) * numVertsAcross + x + 1, (z + 0) * numVertsAcross + x + 1);
    }
  }

  const arrays = reorientVertices({
    position: positions,
    normal: normals,
    texcoord: texcoords,
    indices: indices
  }, matrix);
  return arrays;
}
/**
 * Creates sphere BufferInfo.
 *
 * The created sphere has position, normal, and texcoord data
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} radius radius of the sphere.
 * @param {number} subdivisionsAxis number of steps around the sphere.
 * @param {number} subdivisionsHeight number of vertically on the sphere.
 * @param {number} [opt_startLatitudeInRadians] where to start the
 *     top of the sphere. Default = 0.
 * @param {number} [opt_endLatitudeInRadians] Where to end the
 *     bottom of the sphere. Default = Math.PI.
 * @param {number} [opt_startLongitudeInRadians] where to start
 *     wrapping the sphere. Default = 0.
 * @param {number} [opt_endLongitudeInRadians] where to end
 *     wrapping the sphere. Default = 2 * Math.PI.
 * @return {module:twgl.BufferInfo} The created sphere BufferInfo.
 * @memberOf module:twgl/primitives
 * @function createSphereBufferInfo
 */

/**
 * Creates sphere buffers.
 *
 * The created sphere has position, normal, and texcoord data
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} radius radius of the sphere.
 * @param {number} subdivisionsAxis number of steps around the sphere.
 * @param {number} subdivisionsHeight number of vertically on the sphere.
 * @param {number} [opt_startLatitudeInRadians] where to start the
 *     top of the sphere. Default = 0.
 * @param {number} [opt_endLatitudeInRadians] Where to end the
 *     bottom of the sphere. Default = Math.PI.
 * @param {number} [opt_startLongitudeInRadians] where to start
 *     wrapping the sphere. Default = 0.
 * @param {number} [opt_endLongitudeInRadians] where to end
 *     wrapping the sphere. Default = 2 * Math.PI.
 * @return {Object.<string, WebGLBuffer>} The created sphere buffers.
 * @memberOf module:twgl/primitives
 * @function createSphereBuffers
 */

/**
 * Creates sphere vertices.
 *
 * The created sphere has position, normal, and texcoord data
 *
 * @param {number} radius radius of the sphere.
 * @param {number} subdivisionsAxis number of steps around the sphere.
 * @param {number} subdivisionsHeight number of vertically on the sphere.
 * @param {number} [opt_startLatitudeInRadians] where to start the
 *     top of the sphere. Default = 0.
 * @param {number} [opt_endLatitudeInRadians] Where to end the
 *     bottom of the sphere. Default = Math.PI.
 * @param {number} [opt_startLongitudeInRadians] where to start
 *     wrapping the sphere. Default = 0.
 * @param {number} [opt_endLongitudeInRadians] where to end
 *     wrapping the sphere. Default = 2 * Math.PI.
 * @return {Object.<string, TypedArray>} The created sphere vertices.
 * @memberOf module:twgl/primitives
 */


function createSphereVertices(radius, subdivisionsAxis, subdivisionsHeight, opt_startLatitudeInRadians, opt_endLatitudeInRadians, opt_startLongitudeInRadians, opt_endLongitudeInRadians) {
  if (subdivisionsAxis <= 0 || subdivisionsHeight <= 0) {
    throw new Error('subdivisionAxis and subdivisionHeight must be > 0');
  }

  opt_startLatitudeInRadians = opt_startLatitudeInRadians || 0;
  opt_endLatitudeInRadians = opt_endLatitudeInRadians || Math.PI;
  opt_startLongitudeInRadians = opt_startLongitudeInRadians || 0;
  opt_endLongitudeInRadians = opt_endLongitudeInRadians || Math.PI * 2;
  const latRange = opt_endLatitudeInRadians - opt_startLatitudeInRadians;
  const longRange = opt_endLongitudeInRadians - opt_startLongitudeInRadians; // We are going to generate our sphere by iterating through its
  // spherical coordinates and generating 2 triangles for each quad on a
  // ring of the sphere.

  const numVertices = (subdivisionsAxis + 1) * (subdivisionsHeight + 1);
  const positions = createAugmentedTypedArray(3, numVertices);
  const normals = createAugmentedTypedArray(3, numVertices);
  const texcoords = createAugmentedTypedArray(2, numVertices); // Generate the individual vertices in our vertex buffer.

  for (let y = 0; y <= subdivisionsHeight; y++) {
    for (let x = 0; x <= subdivisionsAxis; x++) {
      // Generate a vertex based on its spherical coordinates
      const u = x / subdivisionsAxis;
      const v = y / subdivisionsHeight;
      const theta = longRange * u + opt_startLongitudeInRadians;
      const phi = latRange * v + opt_startLatitudeInRadians;
      const sinTheta = Math.sin(theta);
      const cosTheta = Math.cos(theta);
      const sinPhi = Math.sin(phi);
      const cosPhi = Math.cos(phi);
      const ux = cosTheta * sinPhi;
      const uy = cosPhi;
      const uz = sinTheta * sinPhi;
      positions.push(radius * ux, radius * uy, radius * uz);
      normals.push(ux, uy, uz);
      texcoords.push(1 - u, v);
    }
  }

  const numVertsAround = subdivisionsAxis + 1;
  const indices = createAugmentedTypedArray(3, subdivisionsAxis * subdivisionsHeight * 2, Uint16Array);

  for (let x = 0; x < subdivisionsAxis; x++) {
    // eslint-disable-line
    for (let y = 0; y < subdivisionsHeight; y++) {
      // eslint-disable-line
      // Make triangle 1 of quad.
      indices.push((y + 0) * numVertsAround + x, (y + 0) * numVertsAround + x + 1, (y + 1) * numVertsAround + x); // Make triangle 2 of quad.

      indices.push((y + 1) * numVertsAround + x, (y + 0) * numVertsAround + x + 1, (y + 1) * numVertsAround + x + 1);
    }
  }

  return {
    position: positions,
    normal: normals,
    texcoord: texcoords,
    indices: indices
  };
}
/**
 * Array of the indices of corners of each face of a cube.
 * @type {Array.<number[]>}
 * @private
 */


const CUBE_FACE_INDICES = [[3, 7, 5, 1], // right
[6, 2, 0, 4], // left
[6, 7, 3, 2], // ??
[0, 1, 5, 4], // ??
[7, 6, 4, 5], // front
[2, 3, 1, 0] // back
];
/**
 * Creates a BufferInfo for a cube.
 *
 * The cube is created around the origin. (-size / 2, size / 2).
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} [size] width, height and depth of the cube.
 * @return {module:twgl.BufferInfo} The created BufferInfo.
 * @memberOf module:twgl/primitives
 * @function createCubeBufferInfo
 */

/**
 * Creates the buffers and indices for a cube.
 *
 * The cube is created around the origin. (-size / 2, size / 2).
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} [size] width, height and depth of the cube.
 * @return {Object.<string, WebGLBuffer>} The created buffers.
 * @memberOf module:twgl/primitives
 * @function createCubeBuffers
 */

/**
 * Creates the vertices and indices for a cube.
 *
 * The cube is created around the origin. (-size / 2, size / 2).
 *
 * @param {number} [size] width, height and depth of the cube.
 * @return {Object.<string, TypedArray>} The created vertices.
 * @memberOf module:twgl/primitives
 */

function createCubeVertices(size) {
  size = size || 1;
  const k = size / 2;
  const cornerVertices = [[-k, -k, -k], [+k, -k, -k], [-k, +k, -k], [+k, +k, -k], [-k, -k, +k], [+k, -k, +k], [-k, +k, +k], [+k, +k, +k]];
  const faceNormals = [[+1, +0, +0], [-1, +0, +0], [+0, +1, +0], [+0, -1, +0], [+0, +0, +1], [+0, +0, -1]];
  const uvCoords = [[1, 0], [0, 0], [0, 1], [1, 1]];
  const numVertices = 6 * 4;
  const positions = createAugmentedTypedArray(3, numVertices);
  const normals = createAugmentedTypedArray(3, numVertices);
  const texcoords = createAugmentedTypedArray(2, numVertices);
  const indices = createAugmentedTypedArray(3, 6 * 2, Uint16Array);

  for (let f = 0; f < 6; ++f) {
    const faceIndices = CUBE_FACE_INDICES[f];

    for (let v = 0; v < 4; ++v) {
      const position = cornerVertices[faceIndices[v]];
      const normal = faceNormals[f];
      const uv = uvCoords[v]; // Each face needs all four vertices because the normals and texture
      // coordinates are not all the same.

      positions.push(position);
      normals.push(normal);
      texcoords.push(uv);
    } // Two triangles make a square face.


    const offset = 4 * f;
    indices.push(offset + 0, offset + 1, offset + 2);
    indices.push(offset + 0, offset + 2, offset + 3);
  }

  return {
    position: positions,
    normal: normals,
    texcoord: texcoords,
    indices: indices
  };
}
/**
 * Creates a BufferInfo for a truncated cone, which is like a cylinder
 * except that it has different top and bottom radii. A truncated cone
 * can also be used to create cylinders and regular cones. The
 * truncated cone will be created centered about the origin, with the
 * y axis as its vertical axis.
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} bottomRadius Bottom radius of truncated cone.
 * @param {number} topRadius Top radius of truncated cone.
 * @param {number} height Height of truncated cone.
 * @param {number} radialSubdivisions The number of subdivisions around the
 *     truncated cone.
 * @param {number} verticalSubdivisions The number of subdivisions down the
 *     truncated cone.
 * @param {boolean} [opt_topCap] Create top cap. Default = true.
 * @param {boolean} [opt_bottomCap] Create bottom cap. Default = true.
 * @return {module:twgl.BufferInfo} The created cone BufferInfo.
 * @memberOf module:twgl/primitives
 * @function createTruncatedConeBufferInfo
 */

/**
 * Creates buffers for a truncated cone, which is like a cylinder
 * except that it has different top and bottom radii. A truncated cone
 * can also be used to create cylinders and regular cones. The
 * truncated cone will be created centered about the origin, with the
 * y axis as its vertical axis.
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} bottomRadius Bottom radius of truncated cone.
 * @param {number} topRadius Top radius of truncated cone.
 * @param {number} height Height of truncated cone.
 * @param {number} radialSubdivisions The number of subdivisions around the
 *     truncated cone.
 * @param {number} verticalSubdivisions The number of subdivisions down the
 *     truncated cone.
 * @param {boolean} [opt_topCap] Create top cap. Default = true.
 * @param {boolean} [opt_bottomCap] Create bottom cap. Default = true.
 * @return {Object.<string, WebGLBuffer>} The created cone buffers.
 * @memberOf module:twgl/primitives
 * @function createTruncatedConeBuffers
 */

/**
 * Creates vertices for a truncated cone, which is like a cylinder
 * except that it has different top and bottom radii. A truncated cone
 * can also be used to create cylinders and regular cones. The
 * truncated cone will be created centered about the origin, with the
 * y axis as its vertical axis. .
 *
 * @param {number} bottomRadius Bottom radius of truncated cone.
 * @param {number} topRadius Top radius of truncated cone.
 * @param {number} height Height of truncated cone.
 * @param {number} radialSubdivisions The number of subdivisions around the
 *     truncated cone.
 * @param {number} verticalSubdivisions The number of subdivisions down the
 *     truncated cone.
 * @param {boolean} [opt_topCap] Create top cap. Default = true.
 * @param {boolean} [opt_bottomCap] Create bottom cap. Default = true.
 * @return {Object.<string, TypedArray>} The created cone vertices.
 * @memberOf module:twgl/primitives
 */


function createTruncatedConeVertices(bottomRadius, topRadius, height, radialSubdivisions, verticalSubdivisions, opt_topCap, opt_bottomCap) {
  if (radialSubdivisions < 3) {
    throw new Error('radialSubdivisions must be 3 or greater');
  }

  if (verticalSubdivisions < 1) {
    throw new Error('verticalSubdivisions must be 1 or greater');
  }

  const topCap = opt_topCap === undefined ? true : opt_topCap;
  const bottomCap = opt_bottomCap === undefined ? true : opt_bottomCap;
  const extra = (topCap ? 2 : 0) + (bottomCap ? 2 : 0);
  const numVertices = (radialSubdivisions + 1) * (verticalSubdivisions + 1 + extra);
  const positions = createAugmentedTypedArray(3, numVertices);
  const normals = createAugmentedTypedArray(3, numVertices);
  const texcoords = createAugmentedTypedArray(2, numVertices);
  const indices = createAugmentedTypedArray(3, radialSubdivisions * (verticalSubdivisions + extra / 2) * 2, Uint16Array);
  const vertsAroundEdge = radialSubdivisions + 1; // The slant of the cone is constant across its surface

  const slant = Math.atan2(bottomRadius - topRadius, height);
  const cosSlant = Math.cos(slant);
  const sinSlant = Math.sin(slant);
  const start = topCap ? -2 : 0;
  const end = verticalSubdivisions + (bottomCap ? 2 : 0);

  for (let yy = start; yy <= end; ++yy) {
    let v = yy / verticalSubdivisions;
    let y = height * v;
    let ringRadius;

    if (yy < 0) {
      y = 0;
      v = 1;
      ringRadius = bottomRadius;
    } else if (yy > verticalSubdivisions) {
      y = height;
      v = 1;
      ringRadius = topRadius;
    } else {
      ringRadius = bottomRadius + (topRadius - bottomRadius) * (yy / verticalSubdivisions);
    }

    if (yy === -2 || yy === verticalSubdivisions + 2) {
      ringRadius = 0;
      v = 0;
    }

    y -= height / 2;

    for (let ii = 0; ii < vertsAroundEdge; ++ii) {
      const sin = Math.sin(ii * Math.PI * 2 / radialSubdivisions);
      const cos = Math.cos(ii * Math.PI * 2 / radialSubdivisions);
      positions.push(sin * ringRadius, y, cos * ringRadius);

      if (yy < 0) {
        normals.push(0, -1, 0);
      } else if (yy > verticalSubdivisions) {
        normals.push(0, 1, 0);
      } else if (ringRadius === 0.0) {
        normals.push(0, 0, 0);
      } else {
        normals.push(sin * cosSlant, sinSlant, cos * cosSlant);
      }

      texcoords.push(ii / radialSubdivisions, 1 - v);
    }
  }

  for (let yy = 0; yy < verticalSubdivisions + extra; ++yy) {
    // eslint-disable-line
    if (yy === 1 && topCap || yy === verticalSubdivisions + extra - 2 && bottomCap) {
      continue;
    }

    for (let ii = 0; ii < radialSubdivisions; ++ii) {
      // eslint-disable-line
      indices.push(vertsAroundEdge * (yy + 0) + 0 + ii, vertsAroundEdge * (yy + 0) + 1 + ii, vertsAroundEdge * (yy + 1) + 1 + ii);
      indices.push(vertsAroundEdge * (yy + 0) + 0 + ii, vertsAroundEdge * (yy + 1) + 1 + ii, vertsAroundEdge * (yy + 1) + 0 + ii);
    }
  }

  return {
    position: positions,
    normal: normals,
    texcoord: texcoords,
    indices: indices
  };
}
/**
 * Expands RLE data
 * @param {number[]} rleData data in format of run-length, x, y, z, run-length, x, y, z
 * @param {number[]} [padding] value to add each entry with.
 * @return {number[]} the expanded rleData
 * @private
 */


function expandRLEData(rleData, padding) {
  padding = padding || [];
  const data = [];

  for (let ii = 0; ii < rleData.length; ii += 4) {
    const runLength = rleData[ii];
    const element = rleData.slice(ii + 1, ii + 4);
    element.push.apply(element, padding);

    for (let jj = 0; jj < runLength; ++jj) {
      data.push.apply(data, element);
    }
  }

  return data;
}
/**
 * Creates 3D 'F' BufferInfo.
 * An 'F' is useful because you can easily tell which way it is oriented.
 * The created 'F' has position, normal, texcoord, and color buffers.
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @return {module:twgl.BufferInfo} The created BufferInfo.
 * @memberOf module:twgl/primitives
 * @function create3DFBufferInfo
 */

/**
 * Creates 3D 'F' buffers.
 * An 'F' is useful because you can easily tell which way it is oriented.
 * The created 'F' has position, normal, texcoord, and color buffers.
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @return {Object.<string, WebGLBuffer>} The created buffers.
 * @memberOf module:twgl/primitives
 * @function create3DFBuffers
 */

/**
 * Creates 3D 'F' vertices.
 * An 'F' is useful because you can easily tell which way it is oriented.
 * The created 'F' has position, normal, texcoord, and color arrays.
 *
 * @return {Object.<string, TypedArray>} The created vertices.
 * @memberOf module:twgl/primitives
 */


function create3DFVertices() {
  const positions = [// left column front
  0, 0, 0, 0, 150, 0, 30, 0, 0, 0, 150, 0, 30, 150, 0, 30, 0, 0, // top rung front
  30, 0, 0, 30, 30, 0, 100, 0, 0, 30, 30, 0, 100, 30, 0, 100, 0, 0, // middle rung front
  30, 60, 0, 30, 90, 0, 67, 60, 0, 30, 90, 0, 67, 90, 0, 67, 60, 0, // left column back
  0, 0, 30, 30, 0, 30, 0, 150, 30, 0, 150, 30, 30, 0, 30, 30, 150, 30, // top rung back
  30, 0, 30, 100, 0, 30, 30, 30, 30, 30, 30, 30, 100, 0, 30, 100, 30, 30, // middle rung back
  30, 60, 30, 67, 60, 30, 30, 90, 30, 30, 90, 30, 67, 60, 30, 67, 90, 30, // top
  0, 0, 0, 100, 0, 0, 100, 0, 30, 0, 0, 0, 100, 0, 30, 0, 0, 30, // top rung front
  100, 0, 0, 100, 30, 0, 100, 30, 30, 100, 0, 0, 100, 30, 30, 100, 0, 30, // under top rung
  30, 30, 0, 30, 30, 30, 100, 30, 30, 30, 30, 0, 100, 30, 30, 100, 30, 0, // between top rung and middle
  30, 30, 0, 30, 60, 30, 30, 30, 30, 30, 30, 0, 30, 60, 0, 30, 60, 30, // top of middle rung
  30, 60, 0, 67, 60, 30, 30, 60, 30, 30, 60, 0, 67, 60, 0, 67, 60, 30, // front of middle rung
  67, 60, 0, 67, 90, 30, 67, 60, 30, 67, 60, 0, 67, 90, 0, 67, 90, 30, // bottom of middle rung.
  30, 90, 0, 30, 90, 30, 67, 90, 30, 30, 90, 0, 67, 90, 30, 67, 90, 0, // front of bottom
  30, 90, 0, 30, 150, 30, 30, 90, 30, 30, 90, 0, 30, 150, 0, 30, 150, 30, // bottom
  0, 150, 0, 0, 150, 30, 30, 150, 30, 0, 150, 0, 30, 150, 30, 30, 150, 0, // left side
  0, 0, 0, 0, 0, 30, 0, 150, 30, 0, 0, 0, 0, 150, 30, 0, 150, 0];
  const texcoords = [// left column front
  0.22, 0.19, 0.22, 0.79, 0.34, 0.19, 0.22, 0.79, 0.34, 0.79, 0.34, 0.19, // top rung front
  0.34, 0.19, 0.34, 0.31, 0.62, 0.19, 0.34, 0.31, 0.62, 0.31, 0.62, 0.19, // middle rung front
  0.34, 0.43, 0.34, 0.55, 0.49, 0.43, 0.34, 0.55, 0.49, 0.55, 0.49, 0.43, // left column back
  0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, // top rung back
  0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, // middle rung back
  0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, // top
  0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, // top rung front
  0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, // under top rung
  0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, // between top rung and middle
  0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, // top of middle rung
  0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, // front of middle rung
  0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, // bottom of middle rung.
  0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, // front of bottom
  0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, // bottom
  0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, // left side
  0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0];
  const normals = expandRLEData([// left column front
  // top rung front
  // middle rung front
  18, 0, 0, 1, // left column back
  // top rung back
  // middle rung back
  18, 0, 0, -1, // top
  6, 0, 1, 0, // top rung front
  6, 1, 0, 0, // under top rung
  6, 0, -1, 0, // between top rung and middle
  6, 1, 0, 0, // top of middle rung
  6, 0, 1, 0, // front of middle rung
  6, 1, 0, 0, // bottom of middle rung.
  6, 0, -1, 0, // front of bottom
  6, 1, 0, 0, // bottom
  6, 0, -1, 0, // left side
  6, -1, 0, 0]);
  const colors = expandRLEData([// left column front
  // top rung front
  // middle rung front
  18, 200, 70, 120, // left column back
  // top rung back
  // middle rung back
  18, 80, 70, 200, // top
  6, 70, 200, 210, // top rung front
  6, 200, 200, 70, // under top rung
  6, 210, 100, 70, // between top rung and middle
  6, 210, 160, 70, // top of middle rung
  6, 70, 180, 210, // front of middle rung
  6, 100, 70, 210, // bottom of middle rung.
  6, 76, 210, 100, // front of bottom
  6, 140, 210, 80, // bottom
  6, 90, 130, 110, // left side
  6, 160, 160, 220], [255]);
  const numVerts = positions.length / 3;
  const arrays = {
    position: createAugmentedTypedArray(3, numVerts),
    texcoord: createAugmentedTypedArray(2, numVerts),
    normal: createAugmentedTypedArray(3, numVerts),
    color: createAugmentedTypedArray(4, numVerts, Uint8Array),
    indices: createAugmentedTypedArray(3, numVerts / 3, Uint16Array)
  };
  arrays.position.push(positions);
  arrays.texcoord.push(texcoords);
  arrays.normal.push(normals);
  arrays.color.push(colors);

  for (let ii = 0; ii < numVerts; ++ii) {
    arrays.indices.push(ii);
  }

  return arrays;
}
/**
 * Creates crescent BufferInfo.
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} verticalRadius The vertical radius of the crescent.
 * @param {number} outerRadius The outer radius of the crescent.
 * @param {number} innerRadius The inner radius of the crescent.
 * @param {number} thickness The thickness of the crescent.
 * @param {number} subdivisionsDown number of steps around the crescent.
 * @param {number} [startOffset] Where to start arc. Default 0.
 * @param {number} [endOffset] Where to end arg. Default 1.
 * @return {module:twgl.BufferInfo} The created BufferInfo.
 * @memberOf module:twgl/primitives
 * @function createCresentBufferInfo
 */

/**
 * Creates crescent buffers.
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} verticalRadius The vertical radius of the crescent.
 * @param {number} outerRadius The outer radius of the crescent.
 * @param {number} innerRadius The inner radius of the crescent.
 * @param {number} thickness The thickness of the crescent.
 * @param {number} subdivisionsDown number of steps around the crescent.
 * @param {number} [startOffset] Where to start arc. Default 0.
 * @param {number} [endOffset] Where to end arg. Default 1.
 * @return {Object.<string, WebGLBuffer>} The created buffers.
 * @memberOf module:twgl/primitives
 * @function createCresentBuffers
 */

/**
 * Creates crescent vertices.
 *
 * @param {number} verticalRadius The vertical radius of the crescent.
 * @param {number} outerRadius The outer radius of the crescent.
 * @param {number} innerRadius The inner radius of the crescent.
 * @param {number} thickness The thickness of the crescent.
 * @param {number} subdivisionsDown number of steps around the crescent.
 * @param {number} [startOffset] Where to start arc. Default 0.
 * @param {number} [endOffset] Where to end arg. Default 1.
 * @return {Object.<string, TypedArray>} The created vertices.
 * @memberOf module:twgl/primitives
 * @function createCresentBuffers
 */

/**
 * Creates crescent BufferInfo.
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} verticalRadius The vertical radius of the crescent.
 * @param {number} outerRadius The outer radius of the crescent.
 * @param {number} innerRadius The inner radius of the crescent.
 * @param {number} thickness The thickness of the crescent.
 * @param {number} subdivisionsDown number of steps around the crescent.
 * @param {number} [startOffset] Where to start arc. Default 0.
 * @param {number} [endOffset] Where to end arg. Default 1.
 * @return {module:twgl.BufferInfo} The created BufferInfo.
 * @memberOf module:twgl/primitives
 * @function createCrescentBufferInfo
 */

/**
 * Creates crescent buffers.
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} verticalRadius The vertical radius of the crescent.
 * @param {number} outerRadius The outer radius of the crescent.
 * @param {number} innerRadius The inner radius of the crescent.
 * @param {number} thickness The thickness of the crescent.
 * @param {number} subdivisionsDown number of steps around the crescent.
 * @param {number} [startOffset] Where to start arc. Default 0.
 * @param {number} [endOffset] Where to end arg. Default 1.
 * @return {Object.<string, WebGLBuffer>} The created buffers.
 * @memberOf module:twgl/primitives
 * @function createCrescentBuffers
 */

/**
 * Creates crescent vertices.
 *
 * @param {number} verticalRadius The vertical radius of the crescent.
 * @param {number} outerRadius The outer radius of the crescent.
 * @param {number} innerRadius The inner radius of the crescent.
 * @param {number} thickness The thickness of the crescent.
 * @param {number} subdivisionsDown number of steps around the crescent.
 * @param {number} [startOffset] Where to start arc. Default 0.
 * @param {number} [endOffset] Where to end arg. Default 1.
 * @return {Object.<string, TypedArray>} The created vertices.
 * @memberOf module:twgl/primitives
 */


function createCrescentVertices(verticalRadius, outerRadius, innerRadius, thickness, subdivisionsDown, startOffset, endOffset) {
  if (subdivisionsDown <= 0) {
    throw new Error('subdivisionDown must be > 0');
  }

  startOffset = startOffset || 0;
  endOffset = endOffset || 1;
  const subdivisionsThick = 2;
  const offsetRange = endOffset - startOffset;
  const numVertices = (subdivisionsDown + 1) * 2 * (2 + subdivisionsThick);
  const positions = createAugmentedTypedArray(3, numVertices);
  const normals = createAugmentedTypedArray(3, numVertices);
  const texcoords = createAugmentedTypedArray(2, numVertices);

  function lerp(a, b, s) {
    return a + (b - a) * s;
  }

  function createArc(arcRadius, x, normalMult, normalAdd, uMult, uAdd) {
    for (let z = 0; z <= subdivisionsDown; z++) {
      const uBack = x / (subdivisionsThick - 1);
      const v = z / subdivisionsDown;
      const xBack = (uBack - 0.5) * 2;
      const angle = (startOffset + v * offsetRange) * Math.PI;
      const s = Math.sin(angle);
      const c = Math.cos(angle);
      const radius = lerp(verticalRadius, arcRadius, s);
      const px = xBack * thickness;
      const py = c * verticalRadius;
      const pz = s * radius;
      positions.push(px, py, pz);
      const n = add(multiply([0, s, c], normalMult), normalAdd);
      normals.push(n);
      texcoords.push(uBack * uMult + uAdd, v);
    }
  } // Generate the individual vertices in our vertex buffer.


  for (let x = 0; x < subdivisionsThick; x++) {
    const uBack = (x / (subdivisionsThick - 1) - 0.5) * 2;
    createArc(outerRadius, x, [1, 1, 1], [0, 0, 0], 1, 0);
    createArc(outerRadius, x, [0, 0, 0], [uBack, 0, 0], 0, 0);
    createArc(innerRadius, x, [1, 1, 1], [0, 0, 0], 1, 0);
    createArc(innerRadius, x, [0, 0, 0], [uBack, 0, 0], 0, 1);
  } // Do outer surface.


  const indices = createAugmentedTypedArray(3, subdivisionsDown * 2 * (2 + subdivisionsThick), Uint16Array);

  function createSurface(leftArcOffset, rightArcOffset) {
    for (let z = 0; z < subdivisionsDown; ++z) {
      // Make triangle 1 of quad.
      indices.push(leftArcOffset + z + 0, leftArcOffset + z + 1, rightArcOffset + z + 0); // Make triangle 2 of quad.

      indices.push(leftArcOffset + z + 1, rightArcOffset + z + 1, rightArcOffset + z + 0);
    }
  }

  const numVerticesDown = subdivisionsDown + 1; // front

  createSurface(numVerticesDown * 0, numVerticesDown * 4); // right

  createSurface(numVerticesDown * 5, numVerticesDown * 7); // back

  createSurface(numVerticesDown * 6, numVerticesDown * 2); // left

  createSurface(numVerticesDown * 3, numVerticesDown * 1);
  return {
    position: positions,
    normal: normals,
    texcoord: texcoords,
    indices: indices
  };
}
/**
 * Creates cylinder BufferInfo. The cylinder will be created around the origin
 * along the y-axis.
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} radius Radius of cylinder.
 * @param {number} height Height of cylinder.
 * @param {number} radialSubdivisions The number of subdivisions around the cylinder.
 * @param {number} verticalSubdivisions The number of subdivisions down the cylinder.
 * @param {boolean} [topCap] Create top cap. Default = true.
 * @param {boolean} [bottomCap] Create bottom cap. Default = true.
 * @return {module:twgl.BufferInfo} The created BufferInfo.
 * @memberOf module:twgl/primitives
 * @function createCylinderBufferInfo
 */

/**
 * Creates cylinder buffers. The cylinder will be created around the origin
 * along the y-axis.
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} radius Radius of cylinder.
 * @param {number} height Height of cylinder.
 * @param {number} radialSubdivisions The number of subdivisions around the cylinder.
 * @param {number} verticalSubdivisions The number of subdivisions down the cylinder.
 * @param {boolean} [topCap] Create top cap. Default = true.
 * @param {boolean} [bottomCap] Create bottom cap. Default = true.
 * @return {Object.<string, WebGLBuffer>} The created buffers.
 * @memberOf module:twgl/primitives
 * @function createCylinderBuffers
 */

/**
 * Creates cylinder vertices. The cylinder will be created around the origin
 * along the y-axis.
 *
 * @param {number} radius Radius of cylinder.
 * @param {number} height Height of cylinder.
 * @param {number} radialSubdivisions The number of subdivisions around the cylinder.
 * @param {number} verticalSubdivisions The number of subdivisions down the cylinder.
 * @param {boolean} [topCap] Create top cap. Default = true.
 * @param {boolean} [bottomCap] Create bottom cap. Default = true.
 * @return {Object.<string, TypedArray>} The created vertices.
 * @memberOf module:twgl/primitives
 */


function createCylinderVertices(radius, height, radialSubdivisions, verticalSubdivisions, topCap, bottomCap) {
  return createTruncatedConeVertices(radius, radius, height, radialSubdivisions, verticalSubdivisions, topCap, bottomCap);
}
/**
 * Creates BufferInfo for a torus
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} radius radius of center of torus circle.
 * @param {number} thickness radius of torus ring.
 * @param {number} radialSubdivisions The number of subdivisions around the torus.
 * @param {number} bodySubdivisions The number of subdivisions around the body torus.
 * @param {boolean} [startAngle] start angle in radians. Default = 0.
 * @param {boolean} [endAngle] end angle in radians. Default = Math.PI * 2.
 * @return {module:twgl.BufferInfo} The created BufferInfo.
 * @memberOf module:twgl/primitives
 * @function createTorusBufferInfo
 */

/**
 * Creates buffers for a torus
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} radius radius of center of torus circle.
 * @param {number} thickness radius of torus ring.
 * @param {number} radialSubdivisions The number of subdivisions around the torus.
 * @param {number} bodySubdivisions The number of subdivisions around the body torus.
 * @param {boolean} [startAngle] start angle in radians. Default = 0.
 * @param {boolean} [endAngle] end angle in radians. Default = Math.PI * 2.
 * @return {Object.<string, WebGLBuffer>} The created buffers.
 * @memberOf module:twgl/primitives
 * @function createTorusBuffers
 */

/**
 * Creates vertices for a torus
 *
 * @param {number} radius radius of center of torus circle.
 * @param {number} thickness radius of torus ring.
 * @param {number} radialSubdivisions The number of subdivisions around the torus.
 * @param {number} bodySubdivisions The number of subdivisions around the body torus.
 * @param {boolean} [startAngle] start angle in radians. Default = 0.
 * @param {boolean} [endAngle] end angle in radians. Default = Math.PI * 2.
 * @return {Object.<string, TypedArray>} The created vertices.
 * @memberOf module:twgl/primitives
 */


function createTorusVertices(radius, thickness, radialSubdivisions, bodySubdivisions, startAngle, endAngle) {
  if (radialSubdivisions < 3) {
    throw new Error('radialSubdivisions must be 3 or greater');
  }

  if (bodySubdivisions < 3) {
    throw new Error('verticalSubdivisions must be 3 or greater');
  }

  startAngle = startAngle || 0;
  endAngle = endAngle || Math.PI * 2;
  const range = endAngle - startAngle;
  const radialParts = radialSubdivisions + 1;
  const bodyParts = bodySubdivisions + 1;
  const numVertices = radialParts * bodyParts;
  const positions = createAugmentedTypedArray(3, numVertices);
  const normals = createAugmentedTypedArray(3, numVertices);
  const texcoords = createAugmentedTypedArray(2, numVertices);
  const indices = createAugmentedTypedArray(3, radialSubdivisions * bodySubdivisions * 2, Uint16Array);

  for (let slice = 0; slice < bodyParts; ++slice) {
    const v = slice / bodySubdivisions;
    const sliceAngle = v * Math.PI * 2;
    const sliceSin = Math.sin(sliceAngle);
    const ringRadius = radius + sliceSin * thickness;
    const ny = Math.cos(sliceAngle);
    const y = ny * thickness;

    for (let ring = 0; ring < radialParts; ++ring) {
      const u = ring / radialSubdivisions;
      const ringAngle = startAngle + u * range;
      const xSin = Math.sin(ringAngle);
      const zCos = Math.cos(ringAngle);
      const x = xSin * ringRadius;
      const z = zCos * ringRadius;
      const nx = xSin * sliceSin;
      const nz = zCos * sliceSin;
      positions.push(x, y, z);
      normals.push(nx, ny, nz);
      texcoords.push(u, 1 - v);
    }
  }

  for (let slice = 0; slice < bodySubdivisions; ++slice) {
    // eslint-disable-line
    for (let ring = 0; ring < radialSubdivisions; ++ring) {
      // eslint-disable-line
      const nextRingIndex = 1 + ring;
      const nextSliceIndex = 1 + slice;
      indices.push(radialParts * slice + ring, radialParts * nextSliceIndex + ring, radialParts * slice + nextRingIndex);
      indices.push(radialParts * nextSliceIndex + ring, radialParts * nextSliceIndex + nextRingIndex, radialParts * slice + nextRingIndex);
    }
  }

  return {
    position: positions,
    normal: normals,
    texcoord: texcoords,
    indices: indices
  };
}
/**
 * Creates a disc BufferInfo. The disc will be in the xz plane, centered at
 * the origin. When creating, at least 3 divisions, or pie
 * pieces, need to be specified, otherwise the triangles making
 * up the disc will be degenerate. You can also specify the
 * number of radial pieces `stacks`. A value of 1 for
 * stacks will give you a simple disc of pie pieces.  If you
 * want to create an annulus you can set `innerRadius` to a
 * value > 0. Finally, `stackPower` allows you to have the widths
 * increase or decrease as you move away from the center. This
 * is particularly useful when using the disc as a ground plane
 * with a fixed camera such that you don't need the resolution
 * of small triangles near the perimeter. For example, a value
 * of 2 will produce stacks whose outside radius increases with
 * the square of the stack index. A value of 1 will give uniform
 * stacks.
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} radius Radius of the ground plane.
 * @param {number} divisions Number of triangles in the ground plane (at least 3).
 * @param {number} [stacks] Number of radial divisions (default=1).
 * @param {number} [innerRadius] Default 0.
 * @param {number} [stackPower] Power to raise stack size to for decreasing width.
 * @return {module:twgl.BufferInfo} The created BufferInfo.
 * @memberOf module:twgl/primitives
 * @function createDiscBufferInfo
 */

/**
 * Creates disc buffers. The disc will be in the xz plane, centered at
 * the origin. When creating, at least 3 divisions, or pie
 * pieces, need to be specified, otherwise the triangles making
 * up the disc will be degenerate. You can also specify the
 * number of radial pieces `stacks`. A value of 1 for
 * stacks will give you a simple disc of pie pieces.  If you
 * want to create an annulus you can set `innerRadius` to a
 * value > 0. Finally, `stackPower` allows you to have the widths
 * increase or decrease as you move away from the center. This
 * is particularly useful when using the disc as a ground plane
 * with a fixed camera such that you don't need the resolution
 * of small triangles near the perimeter. For example, a value
 * of 2 will produce stacks whose outside radius increases with
 * the square of the stack index. A value of 1 will give uniform
 * stacks.
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext.
 * @param {number} radius Radius of the ground plane.
 * @param {number} divisions Number of triangles in the ground plane (at least 3).
 * @param {number} [stacks] Number of radial divisions (default=1).
 * @param {number} [innerRadius] Default 0.
 * @param {number} [stackPower] Power to raise stack size to for decreasing width.
 * @return {Object.<string, WebGLBuffer>} The created buffers.
 * @memberOf module:twgl/primitives
 * @function createDiscBuffers
 */

/**
 * Creates disc vertices. The disc will be in the xz plane, centered at
 * the origin. When creating, at least 3 divisions, or pie
 * pieces, need to be specified, otherwise the triangles making
 * up the disc will be degenerate. You can also specify the
 * number of radial pieces `stacks`. A value of 1 for
 * stacks will give you a simple disc of pie pieces.  If you
 * want to create an annulus you can set `innerRadius` to a
 * value > 0. Finally, `stackPower` allows you to have the widths
 * increase or decrease as you move away from the center. This
 * is particularly useful when using the disc as a ground plane
 * with a fixed camera such that you don't need the resolution
 * of small triangles near the perimeter. For example, a value
 * of 2 will produce stacks whose outside radius increases with
 * the square of the stack index. A value of 1 will give uniform
 * stacks.
 *
 * @param {number} radius Radius of the ground plane.
 * @param {number} divisions Number of triangles in the ground plane (at least 3).
 * @param {number} [stacks] Number of radial divisions (default=1).
 * @param {number} [innerRadius] Default 0.
 * @param {number} [stackPower] Power to raise stack size to for decreasing width.
 * @return {Object.<string, TypedArray>} The created vertices.
 * @memberOf module:twgl/primitives
 */


function createDiscVertices(radius, divisions, stacks, innerRadius, stackPower) {
  if (divisions < 3) {
    throw new Error('divisions must be at least 3');
  }

  stacks = stacks ? stacks : 1;
  stackPower = stackPower ? stackPower : 1;
  innerRadius = innerRadius ? innerRadius : 0; // Note: We don't share the center vertex because that would
  // mess up texture coordinates.

  const numVertices = (divisions + 1) * (stacks + 1);
  const positions = createAugmentedTypedArray(3, numVertices);
  const normals = createAugmentedTypedArray(3, numVertices);
  const texcoords = createAugmentedTypedArray(2, numVertices);
  const indices = createAugmentedTypedArray(3, stacks * divisions * 2, Uint16Array);
  let firstIndex = 0;
  const radiusSpan = radius - innerRadius;
  const pointsPerStack = divisions + 1; // Build the disk one stack at a time.

  for (let stack = 0; stack <= stacks; ++stack) {
    const stackRadius = innerRadius + radiusSpan * Math.pow(stack / stacks, stackPower);

    for (let i = 0; i <= divisions; ++i) {
      const theta = 2.0 * Math.PI * i / divisions;
      const x = stackRadius * Math.cos(theta);
      const z = stackRadius * Math.sin(theta);
      positions.push(x, 0, z);
      normals.push(0, 1, 0);
      texcoords.push(1 - i / divisions, stack / stacks);

      if (stack > 0 && i !== divisions) {
        // a, b, c and d are the indices of the vertices of a quad.  unless
        // the current stack is the one closest to the center, in which case
        // the vertices a and b connect to the center vertex.
        const a = firstIndex + (i + 1);
        const b = firstIndex + i;
        const c = firstIndex + i - pointsPerStack;
        const d = firstIndex + (i + 1) - pointsPerStack; // Make a quad of the vertices a, b, c, d.

        indices.push(a, b, c);
        indices.push(a, c, d);
      }
    }

    firstIndex += divisions + 1;
  }

  return {
    position: positions,
    normal: normals,
    texcoord: texcoords,
    indices: indices
  };
}
/**
 * creates a random integer between 0 and range - 1 inclusive.
 * @param {number} range
 * @return {number} random value between 0 and range - 1 inclusive.
 * @private
 */


function randInt(range) {
  return Math.random() * range | 0;
}
/**
 * Used to supply random colors
 * @callback RandomColorFunc
 * @param {number} ndx index of triangle/quad if unindexed or index of vertex if indexed
 * @param {number} channel 0 = red, 1 = green, 2 = blue, 3 = alpha
 * @return {number} a number from 0 to 255
 * @memberOf module:twgl/primitives
 */

/**
 * @typedef {Object} RandomVerticesOptions
 * @property {number} [vertsPerColor] Defaults to 3 for non-indexed vertices
 * @property {module:twgl/primitives.RandomColorFunc} [rand] A function to generate random numbers
 * @memberOf module:twgl/primitives
 */

/**
 * Creates an augmentedTypedArray of random vertex colors.
 * If the vertices are indexed (have an indices array) then will
 * just make random colors. Otherwise assumes they are triangles
 * and makes one random color for every 3 vertices.
 * @param {Object.<string, AugmentedTypedArray>} vertices Vertices as returned from one of the createXXXVertices functions.
 * @param {module:twgl/primitives.RandomVerticesOptions} [options] options.
 * @return {Object.<string, AugmentedTypedArray>} same vertices as passed in with `color` added.
 * @memberOf module:twgl/primitives
 */


function makeRandomVertexColors(vertices, options) {
  options = options || {};
  const numElements = vertices.position.numElements;
  const vColors = createAugmentedTypedArray(4, numElements, Uint8Array);

  const rand = options.rand || function (ndx, channel) {
    return channel < 3 ? randInt(256) : 255;
  };

  vertices.color = vColors;

  if (vertices.indices) {
    // just make random colors if index
    for (let ii = 0; ii < numElements; ++ii) {
      vColors.push(rand(ii, 0), rand(ii, 1), rand(ii, 2), rand(ii, 3));
    }
  } else {
    // make random colors per triangle
    const numVertsPerColor = options.vertsPerColor || 3;
    const numSets = numElements / numVertsPerColor;

    for (let ii = 0; ii < numSets; ++ii) {
      // eslint-disable-line
      const color = [rand(ii, 0), rand(ii, 1), rand(ii, 2), rand(ii, 3)];

      for (let jj = 0; jj < numVertsPerColor; ++jj) {
        vColors.push(color);
      }
    }
  }

  return vertices;
}
/**
 * creates a function that calls fn to create vertices and then
 * creates a buffers for them
 * @private
 */


function createBufferFunc(fn) {
  return function (gl) {
    const arrays = fn.apply(this, Array.prototype.slice.call(arguments, 1));
    return createBuffersFromArrays(gl, arrays);
  };
}
/**
 * creates a function that calls fn to create vertices and then
 * creates a bufferInfo object for them
 * @private
 */


function createBufferInfoFunc(fn) {
  return function (gl) {
    const arrays = fn.apply(null, Array.prototype.slice.call(arguments, 1));
    return createBufferInfoFromArrays(gl, arrays);
  };
}

const arraySpecPropertyNames = ["numComponents", "size", "type", "normalize", "stride", "offset", "attrib", "name", "attribName"];
/**
 * Copy elements from one array to another
 *
 * @param {Array|TypedArray} src source array
 * @param {Array|TypedArray} dst dest array
 * @param {number} dstNdx index in dest to copy src
 * @param {number} [offset] offset to add to copied values
 * @private
 */

function copyElements(src, dst, dstNdx, offset) {
  offset = offset || 0;
  const length = src.length;

  for (let ii = 0; ii < length; ++ii) {
    dst[dstNdx + ii] = src[ii] + offset;
  }
}
/**
 * Creates an array of the same time
 *
 * @param {(number[]|ArrayBufferView|module:twgl.FullArraySpec)} srcArray array who's type to copy
 * @param {number} length size of new array
 * @return {(number[]|ArrayBufferView|module:twgl.FullArraySpec)} array with same type as srcArray
 * @private
 */


function createArrayOfSameType(srcArray, length) {
  const arraySrc = getArray$1(srcArray);
  const newArray = new arraySrc.constructor(length);
  let newArraySpec = newArray; // If it appears to have been augmented make new one augmented

  if (arraySrc.numComponents && arraySrc.numElements) {
    augmentTypedArray(newArray, arraySrc.numComponents);
  } // If it was a full spec make new one a full spec


  if (srcArray.data) {
    newArraySpec = {
      data: newArray
    };
    copyNamedProperties(arraySpecPropertyNames, srcArray, newArraySpec);
  }

  return newArraySpec;
}
/**
 * Concatenates sets of vertices
 *
 * Assumes the vertices match in composition. For example
 * if one set of vertices has positions, normals, and indices
 * all sets of vertices must have positions, normals, and indices
 * and of the same type.
 *
 * Example:
 *
 *      const cubeVertices = twgl.primitives.createCubeVertices(2);
 *      const sphereVertices = twgl.primitives.createSphereVertices(1, 10, 10);
 *      // move the sphere 2 units up
 *      twgl.primitives.reorientVertices(
 *          sphereVertices, twgl.m4.translation([0, 2, 0]));
 *      // merge the sphere with the cube
 *      const cubeSphereVertices = twgl.primitives.concatVertices(
 *          [cubeVertices, sphereVertices]);
 *      // turn them into WebGL buffers and attrib data
 *      const bufferInfo = twgl.createBufferInfoFromArrays(gl, cubeSphereVertices);
 *
 * @param {module:twgl.Arrays[]} arrays Array of arrays of vertices
 * @return {module:twgl.Arrays} The concatenated vertices.
 * @memberOf module:twgl/primitives
 */


function concatVertices(arrayOfArrays) {
  const names = {};
  let baseName; // get names of all arrays.
  // and numElements for each set of vertices

  for (let ii = 0; ii < arrayOfArrays.length; ++ii) {
    const arrays = arrayOfArrays[ii];
    Object.keys(arrays).forEach(function (name) {
      // eslint-disable-line
      if (!names[name]) {
        names[name] = [];
      }

      if (!baseName && name !== 'indices') {
        baseName = name;
      }

      const arrayInfo = arrays[name];
      const numComponents = getNumComponents$1(arrayInfo, name);
      const array = getArray$1(arrayInfo);
      const numElements = array.length / numComponents;
      names[name].push(numElements);
    });
  } // compute length of combined array
  // and return one for reference


  function getLengthOfCombinedArrays(name) {
    let length = 0;
    let arraySpec;

    for (let ii = 0; ii < arrayOfArrays.length; ++ii) {
      const arrays = arrayOfArrays[ii];
      const arrayInfo = arrays[name];
      const array = getArray$1(arrayInfo);
      length += array.length;

      if (!arraySpec || arrayInfo.data) {
        arraySpec = arrayInfo;
      }
    }

    return {
      length: length,
      spec: arraySpec
    };
  }

  function copyArraysToNewArray(name, base, newArray) {
    let baseIndex = 0;
    let offset = 0;

    for (let ii = 0; ii < arrayOfArrays.length; ++ii) {
      const arrays = arrayOfArrays[ii];
      const arrayInfo = arrays[name];
      const array = getArray$1(arrayInfo);

      if (name === 'indices') {
        copyElements(array, newArray, offset, baseIndex);
        baseIndex += base[ii];
      } else {
        copyElements(array, newArray, offset);
      }

      offset += array.length;
    }
  }

  const base = names[baseName];
  const newArrays = {};
  Object.keys(names).forEach(function (name) {
    const info = getLengthOfCombinedArrays(name);
    const newArraySpec = createArrayOfSameType(info.spec, info.length);
    copyArraysToNewArray(name, base, getArray$1(newArraySpec));
    newArrays[name] = newArraySpec;
  });
  return newArrays;
}
/**
 * Creates a duplicate set of vertices
 *
 * This is useful for calling reorientVertices when you
 * also want to keep the original available
 *
 * @param {module:twgl.Arrays} arrays of vertices
 * @return {module:twgl.Arrays} The duplicated vertices.
 * @memberOf module:twgl/primitives
 */


function duplicateVertices(arrays) {
  const newArrays = {};
  Object.keys(arrays).forEach(function (name) {
    const arraySpec = arrays[name];
    const srcArray = getArray$1(arraySpec);
    const newArraySpec = createArrayOfSameType(arraySpec, srcArray.length);
    copyElements(srcArray, getArray$1(newArraySpec), 0);
    newArrays[name] = newArraySpec;
  });
  return newArrays;
}

const create3DFBufferInfo = createBufferInfoFunc(create3DFVertices);
const create3DFBuffers = createBufferFunc(create3DFVertices);
const createCubeBufferInfo = createBufferInfoFunc(createCubeVertices);
const createCubeBuffers = createBufferFunc(createCubeVertices);
const createPlaneBufferInfo = createBufferInfoFunc(createPlaneVertices);
const createPlaneBuffers = createBufferFunc(createPlaneVertices);
const createSphereBufferInfo = createBufferInfoFunc(createSphereVertices);
const createSphereBuffers = createBufferFunc(createSphereVertices);
const createTruncatedConeBufferInfo = createBufferInfoFunc(createTruncatedConeVertices);
const createTruncatedConeBuffers = createBufferFunc(createTruncatedConeVertices);
const createXYQuadBufferInfo = createBufferInfoFunc(createXYQuadVertices);
const createXYQuadBuffers = createBufferFunc(createXYQuadVertices);
const createCrescentBufferInfo = createBufferInfoFunc(createCrescentVertices);
const createCrescentBuffers = createBufferFunc(createCrescentVertices);
const createCylinderBufferInfo = createBufferInfoFunc(createCylinderVertices);
const createCylinderBuffers = createBufferFunc(createCylinderVertices);
const createTorusBufferInfo = createBufferInfoFunc(createTorusVertices);
const createTorusBuffers = createBufferFunc(createTorusVertices);
const createDiscBufferInfo = createBufferInfoFunc(createDiscVertices);
const createDiscBuffers = createBufferFunc(createDiscVertices); // these were mis-spelled until 4.12

const createCresentBufferInfo = createCrescentBufferInfo;
const createCresentBuffers = createCrescentBuffers;
const createCresentVertices = createCrescentVertices;
var primitives = /*#__PURE__*/Object.freeze({
  __proto__: null,
  create3DFBufferInfo: create3DFBufferInfo,
  create3DFBuffers: create3DFBuffers,
  create3DFVertices: create3DFVertices,
  createAugmentedTypedArray: createAugmentedTypedArray,
  createCubeBufferInfo: createCubeBufferInfo,
  createCubeBuffers: createCubeBuffers,
  createCubeVertices: createCubeVertices,
  createPlaneBufferInfo: createPlaneBufferInfo,
  createPlaneBuffers: createPlaneBuffers,
  createPlaneVertices: createPlaneVertices,
  createSphereBufferInfo: createSphereBufferInfo,
  createSphereBuffers: createSphereBuffers,
  createSphereVertices: createSphereVertices,
  createTruncatedConeBufferInfo: createTruncatedConeBufferInfo,
  createTruncatedConeBuffers: createTruncatedConeBuffers,
  createTruncatedConeVertices: createTruncatedConeVertices,
  createXYQuadBufferInfo: createXYQuadBufferInfo,
  createXYQuadBuffers: createXYQuadBuffers,
  createXYQuadVertices: createXYQuadVertices,
  createCresentBufferInfo: createCresentBufferInfo,
  createCresentBuffers: createCresentBuffers,
  createCresentVertices: createCresentVertices,
  createCrescentBufferInfo: createCrescentBufferInfo,
  createCrescentBuffers: createCrescentBuffers,
  createCrescentVertices: createCrescentVertices,
  createCylinderBufferInfo: createCylinderBufferInfo,
  createCylinderBuffers: createCylinderBuffers,
  createCylinderVertices: createCylinderVertices,
  createTorusBufferInfo: createTorusBufferInfo,
  createTorusBuffers: createTorusBuffers,
  createTorusVertices: createTorusVertices,
  createDiscBufferInfo: createDiscBufferInfo,
  createDiscBuffers: createDiscBuffers,
  createDiscVertices: createDiscVertices,
  deindexVertices: deindexVertices,
  flattenNormals: flattenNormals,
  makeRandomVertexColors: makeRandomVertexColors,
  reorientDirections: reorientDirections,
  reorientNormals: reorientNormals,
  reorientPositions: reorientPositions,
  reorientVertices: reorientVertices,
  concatVertices: concatVertices,
  duplicateVertices: duplicateVertices
});
/*
 * Copyright 2019 Gregg Tavares
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

/**
 * Gets the gl version as a number
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext
 * @return {number} version of gl
 * @private
 */
//function getVersionAsNumber(gl) {
//  return parseFloat(gl.getParameter(gl.VERSION).substr(6));
//}

/**
 * Check if context is WebGL 2.0
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext
 * @return {bool} true if it's WebGL 2.0
 * @memberOf module:twgl
 */

exports.primitives = primitives;

function isWebGL2(gl) {
  // This is the correct check but it's slow
  //  return gl.getParameter(gl.VERSION).indexOf("WebGL 2.0") === 0;
  // This might also be the correct check but I'm assuming it's slow-ish
  // return gl instanceof WebGL2RenderingContext;
  return !!gl.texStorage2D;
}
/**
 * Check if context is WebGL 1.0
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext
 * @return {bool} true if it's WebGL 1.0
 * @memberOf module:twgl
 */


function isWebGL1(gl) {
  // This is the correct check but it's slow
  // const version = getVersionAsNumber(gl);
  // return version <= 1.0 && version > 0.0;  // because as of 2016/5 Edge returns 0.96
  // This might also be the correct check but I'm assuming it's slow-ish
  // return gl instanceof WebGLRenderingContext;
  return !gl.texStorage2D;
}
/**
 * Gets a string for WebGL enum
 *
 * Note: Several enums are the same. Without more
 * context (which function) it's impossible to always
 * give the correct enum. As it is, for matching values
 * it gives all enums. Checking the WebGL2RenderingContext
 * that means
 *
 *      0     = ZERO | POINT | NONE | NO_ERROR
 *      1     = ONE | LINES | SYNC_FLUSH_COMMANDS_BIT
 *      32777 = BLEND_EQUATION_RGB | BLEND_EQUATION_RGB
 *      36662 = COPY_READ_BUFFER | COPY_READ_BUFFER_BINDING
 *      36663 = COPY_WRITE_BUFFER | COPY_WRITE_BUFFER_BINDING
 *      36006 = FRAMEBUFFER_BINDING | DRAW_FRAMEBUFFER_BINDING
 *
 * It's also not useful for bits really unless you pass in individual bits.
 * In other words
 *
 *     const bits = gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT;
 *     twgl.glEnumToString(gl, bits);  // not going to work
 *
 * Note that some enums only exist on extensions. If you
 * want them to show up you need to pass the extension at least
 * once. For example
 *
 *     const ext = gl.getExtension('WEBGL_compressed_texture_s3tc');
 *     if (ext) {
 *        twgl.glEnumToString(ext, 0);  // just prime the function
 *
 *        ..later..
 *
 *        const internalFormat = ext.COMPRESSED_RGB_S3TC_DXT1_EXT;
 *        console.log(twgl.glEnumToString(gl, internalFormat));
 *
 * Notice I didn't have to pass the extension the second time. This means
 * you can have place that generically gets an enum for texture formats for example.
 * and as long as you primed the function with the extensions
 *
 * If you're using `twgl.addExtensionsToContext` to enable your extensions
 * then twgl will automatically get the extension's enums.
 *
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext or any extension object
 * @param {number} value the value of the enum you want to look up.
 * @return {string} enum string or hex value
 * @memberOf module:twgl
 * @function glEnumToString
 */


const glEnumToString = function () {
  const haveEnumsForType = {};
  const enums = {};

  function addEnums(gl) {
    const type = gl.constructor.name;

    if (!haveEnumsForType[type]) {
      for (const key in gl) {
        if (typeof gl[key] === 'number') {
          const existing = enums[gl[key]];
          enums[gl[key]] = existing ? `${existing} | ${key}` : key;
        }
      }

      haveEnumsForType[type] = true;
    }
  }

  return function glEnumToString(gl, value) {
    addEnums(gl);
    return enums[value] || (typeof value === 'number' ? `0x${value.toString(16)}` : value);
  };
}();

exports.glEnumToString = glEnumToString;
var utils = /*#__PURE__*/Object.freeze({
  __proto__: null,
  glEnumToString: glEnumToString,
  isWebGL1: isWebGL1,
  isWebGL2: isWebGL2
});
/*
 * Copyright 2019 Gregg Tavares
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

exports.utils = utils;
const defaults$1 = {
  textureColor: new Uint8Array([128, 192, 255, 255]),
  textureOptions: {},
  crossOrigin: undefined
};
const isArrayBuffer$1 = isArrayBuffer; // Should we make this on demand?

const getShared2DContext = function () {
  let s_ctx;
  return function getShared2DContext() {
    s_ctx = s_ctx || (typeof document !== 'undefined' && document.createElement ? document.createElement("canvas").getContext("2d") : null);
    return s_ctx;
  };
}(); // NOTE: Chrome supports 2D canvas in a Worker (behind flag as of v64 but
//       not only does Firefox NOT support it but Firefox freezes immediately
//       if you try to create one instead of just returning null and continuing.
//  : (global.OffscreenCanvas && (new global.OffscreenCanvas(1, 1)).getContext("2d"));  // OffscreenCanvas may not support 2d
// NOTE: We can maybe remove some of the need for the 2d canvas. In WebGL2
// we can use the various unpack settings. Otherwise we could try using
// the ability of an ImageBitmap to be cut. Unfortunately cutting an ImageBitmap
// is async and the current TWGL code expects a non-Async result though that
// might not be a problem. ImageBitmap though is not available in Edge or Safari
// as of 2018-01-02

/* PixelFormat */


const ALPHA = 0x1906;
const RGB = 0x1907;
const RGBA = 0x1908;
const LUMINANCE = 0x1909;
const LUMINANCE_ALPHA = 0x190A;
const DEPTH_COMPONENT = 0x1902;
const DEPTH_STENCIL = 0x84F9;
/* TextureWrapMode */
// const REPEAT                         = 0x2901;
// const MIRRORED_REPEAT                = 0x8370;

const CLAMP_TO_EDGE = 0x812f;
/* TextureMagFilter */

const NEAREST = 0x2600;
const LINEAR = 0x2601;
/* TextureMinFilter */
// const NEAREST_MIPMAP_NEAREST         = 0x2700;
// const LINEAR_MIPMAP_NEAREST          = 0x2701;
// const NEAREST_MIPMAP_LINEAR          = 0x2702;
// const LINEAR_MIPMAP_LINEAR           = 0x2703;

/* Texture Target */

const TEXTURE_2D = 0x0de1;
const TEXTURE_CUBE_MAP = 0x8513;
const TEXTURE_3D = 0x806f;
const TEXTURE_2D_ARRAY = 0x8c1a;
/* Cubemap Targets */

const TEXTURE_CUBE_MAP_POSITIVE_X = 0x8515;
const TEXTURE_CUBE_MAP_NEGATIVE_X = 0x8516;
const TEXTURE_CUBE_MAP_POSITIVE_Y = 0x8517;
const TEXTURE_CUBE_MAP_NEGATIVE_Y = 0x8518;
const TEXTURE_CUBE_MAP_POSITIVE_Z = 0x8519;
const TEXTURE_CUBE_MAP_NEGATIVE_Z = 0x851a;
/* Texture Parameters */

const TEXTURE_MIN_FILTER = 0x2801;
const TEXTURE_MAG_FILTER = 0x2800;
const TEXTURE_WRAP_S = 0x2802;
const TEXTURE_WRAP_T = 0x2803;
const TEXTURE_WRAP_R = 0x8072;
const TEXTURE_MIN_LOD = 0x813a;
const TEXTURE_MAX_LOD = 0x813b;
const TEXTURE_BASE_LEVEL = 0x813c;
const TEXTURE_MAX_LEVEL = 0x813d;
/* Pixel store */

const UNPACK_ALIGNMENT = 0x0cf5;
const UNPACK_ROW_LENGTH = 0x0cf2;
const UNPACK_IMAGE_HEIGHT = 0x806e;
const UNPACK_SKIP_PIXELS = 0x0cf4;
const UNPACK_SKIP_ROWS = 0x0cf3;
const UNPACK_SKIP_IMAGES = 0x806d;
const UNPACK_COLORSPACE_CONVERSION_WEBGL = 0x9243;
const UNPACK_PREMULTIPLY_ALPHA_WEBGL = 0x9241;
const UNPACK_FLIP_Y_WEBGL = 0x9240;
const R8 = 0x8229;
const R8_SNORM = 0x8F94;
const R16F = 0x822D;
const R32F = 0x822E;
const R8UI = 0x8232;
const R8I = 0x8231;
const RG16UI = 0x823A;
const RG16I = 0x8239;
const RG32UI = 0x823C;
const RG32I = 0x823B;
const RG8 = 0x822B;
const RG8_SNORM = 0x8F95;
const RG16F = 0x822F;
const RG32F = 0x8230;
const RG8UI = 0x8238;
const RG8I = 0x8237;
const R16UI = 0x8234;
const R16I = 0x8233;
const R32UI = 0x8236;
const R32I = 0x8235;
const RGB8 = 0x8051;
const SRGB8 = 0x8C41;
const RGB565 = 0x8D62;
const RGB8_SNORM = 0x8F96;
const R11F_G11F_B10F = 0x8C3A;
const RGB9_E5 = 0x8C3D;
const RGB16F = 0x881B;
const RGB32F = 0x8815;
const RGB8UI = 0x8D7D;
const RGB8I = 0x8D8F;
const RGB16UI = 0x8D77;
const RGB16I = 0x8D89;
const RGB32UI = 0x8D71;
const RGB32I = 0x8D83;
const RGBA8 = 0x8058;
const SRGB8_ALPHA8 = 0x8C43;
const RGBA8_SNORM = 0x8F97;
const RGB5_A1 = 0x8057;
const RGBA4 = 0x8056;
const RGB10_A2 = 0x8059;
const RGBA16F = 0x881A;
const RGBA32F = 0x8814;
const RGBA8UI = 0x8D7C;
const RGBA8I = 0x8D8E;
const RGB10_A2UI = 0x906F;
const RGBA16UI = 0x8D76;
const RGBA16I = 0x8D88;
const RGBA32I = 0x8D82;
const RGBA32UI = 0x8D70;
const DEPTH_COMPONENT16 = 0x81A5;
const DEPTH_COMPONENT24 = 0x81A6;
const DEPTH_COMPONENT32F = 0x8CAC;
const DEPTH32F_STENCIL8 = 0x8CAD;
const DEPTH24_STENCIL8 = 0x88F0;
/* DataType */

const BYTE$2 = 0x1400;
const UNSIGNED_BYTE$2 = 0x1401;
const SHORT$2 = 0x1402;
const UNSIGNED_SHORT$2 = 0x1403;
const INT$2 = 0x1404;
const UNSIGNED_INT$2 = 0x1405;
const FLOAT$2 = 0x1406;
const UNSIGNED_SHORT_4_4_4_4$1 = 0x8033;
const UNSIGNED_SHORT_5_5_5_1$1 = 0x8034;
const UNSIGNED_SHORT_5_6_5$1 = 0x8363;
const HALF_FLOAT$1 = 0x140B;
const HALF_FLOAT_OES = 0x8D61; // Thanks Khronos for making this different >:(

const UNSIGNED_INT_2_10_10_10_REV$1 = 0x8368;
const UNSIGNED_INT_10F_11F_11F_REV$1 = 0x8C3B;
const UNSIGNED_INT_5_9_9_9_REV$1 = 0x8C3E;
const FLOAT_32_UNSIGNED_INT_24_8_REV$1 = 0x8DAD;
const UNSIGNED_INT_24_8$1 = 0x84FA;
const RG = 0x8227;
const RG_INTEGER = 0x8228;
const RED = 0x1903;
const RED_INTEGER = 0x8D94;
const RGB_INTEGER = 0x8D98;
const RGBA_INTEGER = 0x8D99;
const formatInfo = {};
{
  // NOTE: this is named `numColorComponents` vs `numComponents` so we can let Uglify mangle
  // the name.
  const f = formatInfo;
  f[ALPHA] = {
    numColorComponents: 1
  };
  f[LUMINANCE] = {
    numColorComponents: 1
  };
  f[LUMINANCE_ALPHA] = {
    numColorComponents: 2
  };
  f[RGB] = {
    numColorComponents: 3
  };
  f[RGBA] = {
    numColorComponents: 4
  };
  f[RED] = {
    numColorComponents: 1
  };
  f[RED_INTEGER] = {
    numColorComponents: 1
  };
  f[RG] = {
    numColorComponents: 2
  };
  f[RG_INTEGER] = {
    numColorComponents: 2
  };
  f[RGB] = {
    numColorComponents: 3
  };
  f[RGB_INTEGER] = {
    numColorComponents: 3
  };
  f[RGBA] = {
    numColorComponents: 4
  };
  f[RGBA_INTEGER] = {
    numColorComponents: 4
  };
  f[DEPTH_COMPONENT] = {
    numColorComponents: 1
  };
  f[DEPTH_STENCIL] = {
    numColorComponents: 2
  };
}
/**
 * @typedef {Object} TextureFormatDetails
 * @property {number} textureFormat format to pass texImage2D and similar functions.
 * @property {boolean} colorRenderable true if you can render to this format of texture.
 * @property {boolean} textureFilterable true if you can filter the texture, false if you can ony use `NEAREST`.
 * @property {number[]} type Array of possible types you can pass to texImage2D and similar function
 * @property {Object.<number,number>} bytesPerElementMap A map of types to bytes per element
 * @private
 */

let s_textureInternalFormatInfo;

function getTextureInternalFormatInfo(internalFormat) {
  if (!s_textureInternalFormatInfo) {
    // NOTE: these properties need unique names so we can let Uglify mangle the name.
    const t = {}; // unsized formats

    t[ALPHA] = {
      textureFormat: ALPHA,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [1, 2, 2, 4],
      type: [UNSIGNED_BYTE$2, HALF_FLOAT$1, HALF_FLOAT_OES, FLOAT$2]
    };
    t[LUMINANCE] = {
      textureFormat: LUMINANCE,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [1, 2, 2, 4],
      type: [UNSIGNED_BYTE$2, HALF_FLOAT$1, HALF_FLOAT_OES, FLOAT$2]
    };
    t[LUMINANCE_ALPHA] = {
      textureFormat: LUMINANCE_ALPHA,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [2, 4, 4, 8],
      type: [UNSIGNED_BYTE$2, HALF_FLOAT$1, HALF_FLOAT_OES, FLOAT$2]
    };
    t[RGB] = {
      textureFormat: RGB,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [3, 6, 6, 12, 2],
      type: [UNSIGNED_BYTE$2, HALF_FLOAT$1, HALF_FLOAT_OES, FLOAT$2, UNSIGNED_SHORT_5_6_5$1]
    };
    t[RGBA] = {
      textureFormat: RGBA,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [4, 8, 8, 16, 2, 2],
      type: [UNSIGNED_BYTE$2, HALF_FLOAT$1, HALF_FLOAT_OES, FLOAT$2, UNSIGNED_SHORT_4_4_4_4$1, UNSIGNED_SHORT_5_5_5_1$1]
    };
    t[DEPTH_COMPONENT] = {
      textureFormat: DEPTH_COMPONENT,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [2, 4],
      type: [UNSIGNED_INT$2, UNSIGNED_SHORT$2]
    }; // sized formats

    t[R8] = {
      textureFormat: RED,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [1],
      type: [UNSIGNED_BYTE$2]
    };
    t[R8_SNORM] = {
      textureFormat: RED,
      colorRenderable: false,
      textureFilterable: true,
      bytesPerElement: [1],
      type: [BYTE$2]
    };
    t[R16F] = {
      textureFormat: RED,
      colorRenderable: false,
      textureFilterable: true,
      bytesPerElement: [4, 2],
      type: [FLOAT$2, HALF_FLOAT$1]
    };
    t[R32F] = {
      textureFormat: RED,
      colorRenderable: false,
      textureFilterable: false,
      bytesPerElement: [4],
      type: [FLOAT$2]
    };
    t[R8UI] = {
      textureFormat: RED_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [1],
      type: [UNSIGNED_BYTE$2]
    };
    t[R8I] = {
      textureFormat: RED_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [1],
      type: [BYTE$2]
    };
    t[R16UI] = {
      textureFormat: RED_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [2],
      type: [UNSIGNED_SHORT$2]
    };
    t[R16I] = {
      textureFormat: RED_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [2],
      type: [SHORT$2]
    };
    t[R32UI] = {
      textureFormat: RED_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [4],
      type: [UNSIGNED_INT$2]
    };
    t[R32I] = {
      textureFormat: RED_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [4],
      type: [INT$2]
    };
    t[RG8] = {
      textureFormat: RG,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [2],
      type: [UNSIGNED_BYTE$2]
    };
    t[RG8_SNORM] = {
      textureFormat: RG,
      colorRenderable: false,
      textureFilterable: true,
      bytesPerElement: [2],
      type: [BYTE$2]
    };
    t[RG16F] = {
      textureFormat: RG,
      colorRenderable: false,
      textureFilterable: true,
      bytesPerElement: [8, 4],
      type: [FLOAT$2, HALF_FLOAT$1]
    };
    t[RG32F] = {
      textureFormat: RG,
      colorRenderable: false,
      textureFilterable: false,
      bytesPerElement: [8],
      type: [FLOAT$2]
    };
    t[RG8UI] = {
      textureFormat: RG_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [2],
      type: [UNSIGNED_BYTE$2]
    };
    t[RG8I] = {
      textureFormat: RG_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [2],
      type: [BYTE$2]
    };
    t[RG16UI] = {
      textureFormat: RG_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [4],
      type: [UNSIGNED_SHORT$2]
    };
    t[RG16I] = {
      textureFormat: RG_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [4],
      type: [SHORT$2]
    };
    t[RG32UI] = {
      textureFormat: RG_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [8],
      type: [UNSIGNED_INT$2]
    };
    t[RG32I] = {
      textureFormat: RG_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [8],
      type: [INT$2]
    };
    t[RGB8] = {
      textureFormat: RGB,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [3],
      type: [UNSIGNED_BYTE$2]
    };
    t[SRGB8] = {
      textureFormat: RGB,
      colorRenderable: false,
      textureFilterable: true,
      bytesPerElement: [3],
      type: [UNSIGNED_BYTE$2]
    };
    t[RGB565] = {
      textureFormat: RGB,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [3, 2],
      type: [UNSIGNED_BYTE$2, UNSIGNED_SHORT_5_6_5$1]
    };
    t[RGB8_SNORM] = {
      textureFormat: RGB,
      colorRenderable: false,
      textureFilterable: true,
      bytesPerElement: [3],
      type: [BYTE$2]
    };
    t[R11F_G11F_B10F] = {
      textureFormat: RGB,
      colorRenderable: false,
      textureFilterable: true,
      bytesPerElement: [12, 6, 4],
      type: [FLOAT$2, HALF_FLOAT$1, UNSIGNED_INT_10F_11F_11F_REV$1]
    };
    t[RGB9_E5] = {
      textureFormat: RGB,
      colorRenderable: false,
      textureFilterable: true,
      bytesPerElement: [12, 6, 4],
      type: [FLOAT$2, HALF_FLOAT$1, UNSIGNED_INT_5_9_9_9_REV$1]
    };
    t[RGB16F] = {
      textureFormat: RGB,
      colorRenderable: false,
      textureFilterable: true,
      bytesPerElement: [12, 6],
      type: [FLOAT$2, HALF_FLOAT$1]
    };
    t[RGB32F] = {
      textureFormat: RGB,
      colorRenderable: false,
      textureFilterable: false,
      bytesPerElement: [12],
      type: [FLOAT$2]
    };
    t[RGB8UI] = {
      textureFormat: RGB_INTEGER,
      colorRenderable: false,
      textureFilterable: false,
      bytesPerElement: [3],
      type: [UNSIGNED_BYTE$2]
    };
    t[RGB8I] = {
      textureFormat: RGB_INTEGER,
      colorRenderable: false,
      textureFilterable: false,
      bytesPerElement: [3],
      type: [BYTE$2]
    };
    t[RGB16UI] = {
      textureFormat: RGB_INTEGER,
      colorRenderable: false,
      textureFilterable: false,
      bytesPerElement: [6],
      type: [UNSIGNED_SHORT$2]
    };
    t[RGB16I] = {
      textureFormat: RGB_INTEGER,
      colorRenderable: false,
      textureFilterable: false,
      bytesPerElement: [6],
      type: [SHORT$2]
    };
    t[RGB32UI] = {
      textureFormat: RGB_INTEGER,
      colorRenderable: false,
      textureFilterable: false,
      bytesPerElement: [12],
      type: [UNSIGNED_INT$2]
    };
    t[RGB32I] = {
      textureFormat: RGB_INTEGER,
      colorRenderable: false,
      textureFilterable: false,
      bytesPerElement: [12],
      type: [INT$2]
    };
    t[RGBA8] = {
      textureFormat: RGBA,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [4],
      type: [UNSIGNED_BYTE$2]
    };
    t[SRGB8_ALPHA8] = {
      textureFormat: RGBA,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [4],
      type: [UNSIGNED_BYTE$2]
    };
    t[RGBA8_SNORM] = {
      textureFormat: RGBA,
      colorRenderable: false,
      textureFilterable: true,
      bytesPerElement: [4],
      type: [BYTE$2]
    };
    t[RGB5_A1] = {
      textureFormat: RGBA,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [4, 2, 4],
      type: [UNSIGNED_BYTE$2, UNSIGNED_SHORT_5_5_5_1$1, UNSIGNED_INT_2_10_10_10_REV$1]
    };
    t[RGBA4] = {
      textureFormat: RGBA,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [4, 2],
      type: [UNSIGNED_BYTE$2, UNSIGNED_SHORT_4_4_4_4$1]
    };
    t[RGB10_A2] = {
      textureFormat: RGBA,
      colorRenderable: true,
      textureFilterable: true,
      bytesPerElement: [4],
      type: [UNSIGNED_INT_2_10_10_10_REV$1]
    };
    t[RGBA16F] = {
      textureFormat: RGBA,
      colorRenderable: false,
      textureFilterable: true,
      bytesPerElement: [16, 8],
      type: [FLOAT$2, HALF_FLOAT$1]
    };
    t[RGBA32F] = {
      textureFormat: RGBA,
      colorRenderable: false,
      textureFilterable: false,
      bytesPerElement: [16],
      type: [FLOAT$2]
    };
    t[RGBA8UI] = {
      textureFormat: RGBA_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [4],
      type: [UNSIGNED_BYTE$2]
    };
    t[RGBA8I] = {
      textureFormat: RGBA_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [4],
      type: [BYTE$2]
    };
    t[RGB10_A2UI] = {
      textureFormat: RGBA_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [4],
      type: [UNSIGNED_INT_2_10_10_10_REV$1]
    };
    t[RGBA16UI] = {
      textureFormat: RGBA_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [8],
      type: [UNSIGNED_SHORT$2]
    };
    t[RGBA16I] = {
      textureFormat: RGBA_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [8],
      type: [SHORT$2]
    };
    t[RGBA32I] = {
      textureFormat: RGBA_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [16],
      type: [INT$2]
    };
    t[RGBA32UI] = {
      textureFormat: RGBA_INTEGER,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [16],
      type: [UNSIGNED_INT$2]
    }; // Sized Internal

    t[DEPTH_COMPONENT16] = {
      textureFormat: DEPTH_COMPONENT,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [2, 4],
      type: [UNSIGNED_SHORT$2, UNSIGNED_INT$2]
    };
    t[DEPTH_COMPONENT24] = {
      textureFormat: DEPTH_COMPONENT,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [4],
      type: [UNSIGNED_INT$2]
    };
    t[DEPTH_COMPONENT32F] = {
      textureFormat: DEPTH_COMPONENT,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [4],
      type: [FLOAT$2]
    };
    t[DEPTH24_STENCIL8] = {
      textureFormat: DEPTH_STENCIL,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [4],
      type: [UNSIGNED_INT_24_8$1]
    };
    t[DEPTH32F_STENCIL8] = {
      textureFormat: DEPTH_STENCIL,
      colorRenderable: true,
      textureFilterable: false,
      bytesPerElement: [4],
      type: [FLOAT_32_UNSIGNED_INT_24_8_REV$1]
    };
    Object.keys(t).forEach(function (internalFormat) {
      const info = t[internalFormat];
      info.bytesPerElementMap = {};
      info.bytesPerElement.forEach(function (bytesPerElement, ndx) {
        const type = info.type[ndx];
        info.bytesPerElementMap[type] = bytesPerElement;
      });
    });
    s_textureInternalFormatInfo = t;
  }

  return s_textureInternalFormatInfo[internalFormat];
}
/**
 * Gets the number of bytes per element for a given internalFormat / type
 * @param {number} internalFormat The internalFormat parameter from texImage2D etc..
 * @param {number} type The type parameter for texImage2D etc..
 * @return {number} the number of bytes per element for the given internalFormat, type combo
 * @memberOf module:twgl/textures
 */


function getBytesPerElementForInternalFormat(internalFormat, type) {
  const info = getTextureInternalFormatInfo(internalFormat);

  if (!info) {
    throw "unknown internal format";
  }

  const bytesPerElement = info.bytesPerElementMap[type];

  if (bytesPerElement === undefined) {
    throw "unknown internal format";
  }

  return bytesPerElement;
}
/**
 * Info related to a specific texture internalFormat as returned
 * from {@link module:twgl/textures.getFormatAndTypeForInternalFormat}.
 *
 * @typedef {Object} TextureFormatInfo
 * @property {number} format Format to pass to texImage2D and related functions
 * @property {number} type Type to pass to texImage2D and related functions
 * @memberOf module:twgl/textures
 */

/**
 * Gets the format and type for a given internalFormat
 *
 * @param {number} internalFormat The internal format
 * @return {module:twgl/textures.TextureFormatInfo} the corresponding format and type,
 * @memberOf module:twgl/textures
 */


function getFormatAndTypeForInternalFormat(internalFormat) {
  const info = getTextureInternalFormatInfo(internalFormat);

  if (!info) {
    throw "unknown internal format";
  }

  return {
    format: info.textureFormat,
    type: info.type[0]
  };
}
/**
 * Returns true if value is power of 2
 * @param {number} value number to check.
 * @return true if value is power of 2
 * @private
 */


function isPowerOf2(value) {
  return (value & value - 1) === 0;
}
/**
 * Gets whether or not we can generate mips for the given
 * internal format.
 *
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {number} width The width parameter from texImage2D etc..
 * @param {number} height The height parameter from texImage2D etc..
 * @param {number} internalFormat The internalFormat parameter from texImage2D etc..
 * @return {boolean} true if we can generate mips
 * @memberOf module:twgl/textures
 */


function canGenerateMipmap(gl, width, height, internalFormat) {
  if (!isWebGL2(gl)) {
    return isPowerOf2(width) && isPowerOf2(height);
  }

  const info = getTextureInternalFormatInfo(internalFormat);

  if (!info) {
    throw "unknown internal format";
  }

  return info.colorRenderable && info.textureFilterable;
}
/**
 * Gets whether or not we can generate mips for the given format
 * @param {number} internalFormat The internalFormat parameter from texImage2D etc..
 * @return {boolean} true if we can generate mips
 * @memberOf module:twgl/textures
 */


function canFilter(internalFormat) {
  const info = getTextureInternalFormatInfo(internalFormat);

  if (!info) {
    throw "unknown internal format";
  }

  return info.textureFilterable;
}
/**
 * Gets the number of components for a given image format.
 * @param {number} format the format.
 * @return {number} the number of components for the format.
 * @memberOf module:twgl/textures
 */


function getNumComponentsForFormat(format) {
  const info = formatInfo[format];

  if (!info) {
    throw "unknown format: " + format;
  }

  return info.numColorComponents;
}
/**
 * Gets the texture type for a given array type.
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @return {number} the gl texture type
 * @private
 */


function getTextureTypeForArrayType(gl, src, defaultType) {
  if (isArrayBuffer$1(src)) {
    return getGLTypeForTypedArray(src);
  }

  return defaultType || UNSIGNED_BYTE$2;
}

function guessDimensions(gl, target, width, height, numElements) {
  if (numElements % 1 !== 0) {
    throw "can't guess dimensions";
  }

  if (!width && !height) {
    const size = Math.sqrt(numElements / (target === TEXTURE_CUBE_MAP ? 6 : 1));

    if (size % 1 === 0) {
      width = size;
      height = size;
    } else {
      width = numElements;
      height = 1;
    }
  } else if (!height) {
    height = numElements / width;

    if (height % 1) {
      throw "can't guess dimensions";
    }
  } else if (!width) {
    width = numElements / height;

    if (width % 1) {
      throw "can't guess dimensions";
    }
  }

  return {
    width: width,
    height: height
  };
}
/**
 * Sets the default texture color.
 *
 * The default texture color is used when loading textures from
 * urls. Because the URL will be loaded async we'd like to be
 * able to use the texture immediately. By putting a 1x1 pixel
 * color in the texture we can start using the texture before
 * the URL has loaded.
 *
 * @param {number[]} color Array of 4 values in the range 0 to 1
 * @deprecated see {@link module:twgl.setDefaults}
 * @memberOf module:twgl/textures
 */


function setDefaultTextureColor(color) {
  defaults$1.textureColor = new Uint8Array([color[0] * 255, color[1] * 255, color[2] * 255, color[3] * 255]);
}

function setDefaults$1(newDefaults) {
  copyExistingProperties(newDefaults, defaults$1);

  if (newDefaults.textureColor) {
    setDefaultTextureColor(newDefaults.textureColor);
  }
}
/**
 * A function to generate the source for a texture.
 * @callback TextureFunc
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext
 * @param {module:twgl.TextureOptions} options the texture options
 * @return {*} Returns any of the things documented for `src` for {@link module:twgl.TextureOptions}.
 * @memberOf module:twgl
 */

/**
 * Texture options passed to most texture functions. Each function will use whatever options
 * are appropriate for its needs. This lets you pass the same options to all functions.
 *
 * Note: A `TexImageSource` is defined in the WebGL spec as a `HTMLImageElement`, `HTMLVideoElement`,
 * `HTMLCanvasElement`, `ImageBitmap`, or `ImageData`.
 *
 * @typedef {Object} TextureOptions
 * @property {number} [target] the type of texture `gl.TEXTURE_2D` or `gl.TEXTURE_CUBE_MAP`. Defaults to `gl.TEXTURE_2D`.
 * @property {number} [level] the mip level to affect. Defaults to 0. Note, if set auto will be considered false unless explicitly set to true.
 * @property {number} [width] the width of the texture. Only used if src is an array or typed array or null.
 * @property {number} [height] the height of a texture. Only used if src is an array or typed array or null.
 * @property {number} [depth] the depth of a texture. Only used if src is an array or type array or null and target is `TEXTURE_3D` .
 * @property {number} [min] the min filter setting (eg. `gl.LINEAR`). Defaults to `gl.NEAREST_MIPMAP_LINEAR`
 *     or if texture is not a power of 2 on both dimensions then defaults to `gl.LINEAR`.
 * @property {number} [mag] the mag filter setting (eg. `gl.LINEAR`). Defaults to `gl.LINEAR`
 * @property {number} [minMag] both the min and mag filter settings.
 * @property {number} [internalFormat] internal format for texture. Defaults to `gl.RGBA`
 * @property {number} [format] format for texture. Defaults to `gl.RGBA`.
 * @property {number} [type] type for texture. Defaults to `gl.UNSIGNED_BYTE` unless `src` is ArrayBufferView. If `src`
 *     is ArrayBufferView defaults to type that matches ArrayBufferView type.
 * @property {number} [wrap] Texture wrapping for both S and T (and R if TEXTURE_3D or WebGLSampler). Defaults to `gl.REPEAT` for 2D unless src is WebGL1 and src not npot and `gl.CLAMP_TO_EDGE` for cube
 * @property {number} [wrapS] Texture wrapping for S. Defaults to `gl.REPEAT` and `gl.CLAMP_TO_EDGE` for cube. If set takes precedence over `wrap`.
 * @property {number} [wrapT] Texture wrapping for T. Defaults to `gl.REPEAT` and `gl.CLAMP_TO_EDGE` for cube. If set takes precedence over `wrap`.
 * @property {number} [wrapR] Texture wrapping for R. Defaults to `gl.REPEAT` and `gl.CLAMP_TO_EDGE` for cube. If set takes precedence over `wrap`.
 * @property {number} [minLod] TEXTURE_MIN_LOD setting
 * @property {number} [maxLod] TEXTURE_MAX_LOD setting
 * @property {number} [baseLevel] TEXTURE_BASE_LEVEL setting
 * @property {number} [maxLevel] TEXTURE_MAX_LEVEL setting
 * @property {number} [unpackAlignment] The `gl.UNPACK_ALIGNMENT` used when uploading an array. Defaults to 1.
 * @property {number[]|ArrayBufferView} [color] Color to initialize this texture with if loading an image asynchronously.
 *     The default use a blue 1x1 pixel texture. You can set another default by calling `twgl.setDefaults`
 *     or you can set an individual texture's initial color by setting this property. Example: `[1, .5, .5, 1]` = pink
 * @property {number} [premultiplyAlpha] Whether or not to premultiply alpha. Defaults to whatever the current setting is.
 *     This lets you set it once before calling `twgl.createTexture` or `twgl.createTextures` and only override
 *     the current setting for specific textures.
 * @property {number} [flipY] Whether or not to flip the texture vertically on upload. Defaults to whatever the current setting is.
 *     This lets you set it once before calling `twgl.createTexture` or `twgl.createTextures` and only override
 *     the current setting for specific textures.
 * @property {number} [colorspaceConversion] Whether or not to let the browser do colorspace conversion of the texture on upload. Defaults to whatever the current setting is.
 *     This lets you set it once before calling `twgl.createTexture` or `twgl.createTextures` and only override
 *     the current setting for specific textures.
 * @property {boolean} [auto] If `undefined` or `true`, in WebGL1, texture filtering is set automatically for non-power of 2 images and
 *    mips are generated for power of 2 images. In WebGL2 mips are generated if they can be. Note: if `level` is set above
 *    then then `auto` is assumed to be `false` unless explicity set to `true`.
 * @property {number[]} [cubeFaceOrder] The order that cube faces are pulled out of an img or set of images. The default is
 *
 *     [gl.TEXTURE_CUBE_MAP_POSITIVE_X,
 *      gl.TEXTURE_CUBE_MAP_NEGATIVE_X,
 *      gl.TEXTURE_CUBE_MAP_POSITIVE_Y,
 *      gl.TEXTURE_CUBE_MAP_NEGATIVE_Y,
 *      gl.TEXTURE_CUBE_MAP_POSITIVE_Z,
 *      gl.TEXTURE_CUBE_MAP_NEGATIVE_Z]
 *
 * @property {(number[]|ArrayBufferView|TexImageSource|TexImageSource[]|string|string[]|module:twgl.TextureFunc)} [src] source for texture
 *
 *    If `string` then it's assumed to be a URL to an image. The image will be downloaded async. A usable
 *    1x1 pixel texture will be returned immediately. The texture will be updated once the image has downloaded.
 *    If `target` is `gl.TEXTURE_CUBE_MAP` will attempt to divide image into 6 square pieces. 1x6, 6x1, 3x2, 2x3.
 *    The pieces will be uploaded in `cubeFaceOrder`
 *
 *    If `string[]` or `TexImageSource[]` and target is `gl.TEXTURE_CUBE_MAP` then it must have 6 entries, one for each face of a cube map.
 *
 *    If `string[]` or `TexImageSource[]` and target is `gl.TEXTURE_2D_ARRAY` then each entry is a slice of the a 2d array texture
 *    and will be scaled to the specified width and height OR to the size of the first image that loads.
 *
 *    If `TexImageSource` then it wil be used immediately to create the contents of the texture. Examples `HTMLImageElement`,
 *    `HTMLCanvasElement`, `HTMLVideoElement`.
 *
 *    If `number[]` or `ArrayBufferView` it's assumed to be data for a texture. If `width` or `height` is
 *    not specified it is guessed as follows. First the number of elements is computed by `src.length / numComponents`
 *    where `numComponents` is derived from `format`. If `target` is `gl.TEXTURE_CUBE_MAP` then `numElements` is divided
 *    by 6. Then
 *
 *    *   If neither `width` nor `height` are specified and `sqrt(numElements)` is an integer then width and height
 *        are set to `sqrt(numElements)`. Otherwise `width = numElements` and `height = 1`.
 *
 *    *   If only one of `width` or `height` is specified then the other equals `numElements / specifiedDimension`.
 *
 * If `number[]` will be converted to `type`.
 *
 * If `src` is a function it will be called with a `WebGLRenderingContext` and these options.
 * Whatever it returns is subject to these rules. So it can return a string url, an `HTMLElement`
 * an array etc...
 *
 * If `src` is undefined then an empty texture will be created of size `width` by `height`.
 *
 * @property {string} [crossOrigin] What to set the crossOrigin property of images when they are downloaded.
 *    default: undefined. Also see {@link module:twgl.setDefaults}.
 *
 * @memberOf module:twgl
 */

/**
 * Sets any packing state that will be set based on the options.
 * @param {module:twgl.TextureOptions} options A TextureOptions object with whatever parameters you want set.
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @private
 */


function setPackState(gl, options) {
  if (options.colorspaceConversion !== undefined) {
    gl.pixelStorei(UNPACK_COLORSPACE_CONVERSION_WEBGL, options.colorspaceConversion);
  }

  if (options.premultiplyAlpha !== undefined) {
    gl.pixelStorei(UNPACK_PREMULTIPLY_ALPHA_WEBGL, options.premultiplyAlpha);
  }

  if (options.flipY !== undefined) {
    gl.pixelStorei(UNPACK_FLIP_Y_WEBGL, options.flipY);
  }
}
/**
 * Set skip state to defaults
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @private
 */


function setSkipStateToDefault(gl) {
  gl.pixelStorei(UNPACK_ALIGNMENT, 4);

  if (isWebGL2(gl)) {
    gl.pixelStorei(UNPACK_ROW_LENGTH, 0);
    gl.pixelStorei(UNPACK_IMAGE_HEIGHT, 0);
    gl.pixelStorei(UNPACK_SKIP_PIXELS, 0);
    gl.pixelStorei(UNPACK_SKIP_ROWS, 0);
    gl.pixelStorei(UNPACK_SKIP_IMAGES, 0);
  }
}
/**
 * Sets the parameters of a texture or sampler
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {number|WebGLSampler} target texture target or sampler
 * @param {function()} parameteriFn texParameteri or samplerParameteri fn
 * @param {WebGLTexture} tex the WebGLTexture to set parameters for
 * @param {module:twgl.TextureOptions} options A TextureOptions object with whatever parameters you want set.
 *   This is often the same options you passed in when you created the texture.
 * @private
 */


function setTextureSamplerParameters(gl, target, parameteriFn, options) {
  if (options.minMag) {
    parameteriFn.call(gl, target, TEXTURE_MIN_FILTER, options.minMag);
    parameteriFn.call(gl, target, TEXTURE_MAG_FILTER, options.minMag);
  }

  if (options.min) {
    parameteriFn.call(gl, target, TEXTURE_MIN_FILTER, options.min);
  }

  if (options.mag) {
    parameteriFn.call(gl, target, TEXTURE_MAG_FILTER, options.mag);
  }

  if (options.wrap) {
    parameteriFn.call(gl, target, TEXTURE_WRAP_S, options.wrap);
    parameteriFn.call(gl, target, TEXTURE_WRAP_T, options.wrap);

    if (target === TEXTURE_3D || isSampler(gl, target)) {
      parameteriFn.call(gl, target, TEXTURE_WRAP_R, options.wrap);
    }
  }

  if (options.wrapR) {
    parameteriFn.call(gl, target, TEXTURE_WRAP_R, options.wrapR);
  }

  if (options.wrapS) {
    parameteriFn.call(gl, target, TEXTURE_WRAP_S, options.wrapS);
  }

  if (options.wrapT) {
    parameteriFn.call(gl, target, TEXTURE_WRAP_T, options.wrapT);
  }

  if (options.minLod) {
    parameteriFn.call(gl, target, TEXTURE_MIN_LOD, options.minLod);
  }

  if (options.maxLod) {
    parameteriFn.call(gl, target, TEXTURE_MAX_LOD, options.maxLod);
  }

  if (options.baseLevel) {
    parameteriFn.call(gl, target, TEXTURE_BASE_LEVEL, options.baseLevel);
  }

  if (options.maxLevel) {
    parameteriFn.call(gl, target, TEXTURE_MAX_LEVEL, options.maxLevel);
  }
}
/**
 * Sets the texture parameters of a texture.
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {WebGLTexture} tex the WebGLTexture to set parameters for
 * @param {module:twgl.TextureOptions} options A TextureOptions object with whatever parameters you want set.
 *   This is often the same options you passed in when you created the texture.
 * @memberOf module:twgl/textures
 */


function setTextureParameters(gl, tex, options) {
  const target = options.target || TEXTURE_2D;
  gl.bindTexture(target, tex);
  setTextureSamplerParameters(gl, target, gl.texParameteri, options);
}
/**
 * Sets the sampler parameters of a sampler.
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {WebGLSampler} sampler the WebGLSampler to set parameters for
 * @param {module:twgl.TextureOptions} options A TextureOptions object with whatever parameters you want set.
 * @memberOf module:twgl/textures
 */


function setSamplerParameters(gl, sampler, options) {
  setTextureSamplerParameters(gl, sampler, gl.samplerParameteri, options);
}
/**
 * Creates a new sampler object and sets parameters.
 *
 * Example:
 *
 *      const sampler = twgl.createSampler(gl, {
 *        minMag: gl.NEAREST,         // sets both TEXTURE_MIN_FILTER and TEXTURE_MAG_FILTER
 *        wrap: gl.CLAMP_TO_NEAREST,  // sets both TEXTURE_WRAP_S and TEXTURE_WRAP_T and TEXTURE_WRAP_R
 *      });
 *
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {Object.<string,module:twgl.TextureOptions>} options A object of TextureOptions one per sampler.
 * @return {Object.<string,WebGLSampler>} the created samplers by name
 * @private
 */


function createSampler(gl, options) {
  const sampler = gl.createSampler();
  setSamplerParameters(gl, sampler, options);
  return sampler;
}
/**
 * Creates a multiple sampler objects and sets parameters on each.
 *
 * Example:
 *
 *      const samplers = twgl.createSamplers(gl, {
 *        nearest: {
 *          minMag: gl.NEAREST,
 *        },
 *        nearestClampS: {
 *          minMag: gl.NEAREST,
 *          wrapS: gl.CLAMP_TO_NEAREST,
 *        },
 *        linear: {
 *          minMag: gl.LINEAR,
 *        },
 *        nearestClamp: {
 *          minMag: gl.NEAREST,
 *          wrap: gl.CLAMP_TO_EDGE,
 *        },
 *        linearClamp: {
 *          minMag: gl.LINEAR,
 *          wrap: gl.CLAMP_TO_EDGE,
 *        },
 *        linearClampT: {
 *          minMag: gl.LINEAR,
 *          wrapT: gl.CLAMP_TO_EDGE,
 *        },
 *      });
 *
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {module:twgl.TextureOptions} [options] A TextureOptions object with whatever parameters you want set on the sampler
 * @private
 */


function createSamplers(gl, samplerOptions) {
  const samplers = {};
  Object.keys(samplerOptions).forEach(function (name) {
    samplers[name] = createSampler(gl, samplerOptions[name]);
  });
  return samplers;
}
/**
 * Makes a 1x1 pixel
 * If no color is passed in uses the default color which can be set by calling `setDefaultTextureColor`.
 * @param {(number[]|ArrayBufferView)} [color] The color using 0-1 values
 * @return {Uint8Array} Unit8Array with color.
 * @private
 */


function make1Pixel(color) {
  color = color || defaults$1.textureColor;

  if (isArrayBuffer$1(color)) {
    return color;
  }

  return new Uint8Array([color[0] * 255, color[1] * 255, color[2] * 255, color[3] * 255]);
}
/**
 * Sets filtering or generates mips for texture based on width or height
 * If width or height is not passed in uses `options.width` and//or `options.height`
 *
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {WebGLTexture} tex the WebGLTexture to set parameters for
 * @param {module:twgl.TextureOptions} [options] A TextureOptions object with whatever parameters you want set.
 *   This is often the same options you passed in when you created the texture.
 * @param {number} [width] width of texture
 * @param {number} [height] height of texture
 * @param {number} [internalFormat] The internalFormat parameter from texImage2D etc..
 * @memberOf module:twgl/textures
 */


function setTextureFilteringForSize(gl, tex, options, width, height, internalFormat) {
  options = options || defaults$1.textureOptions;
  internalFormat = internalFormat || RGBA;
  const target = options.target || TEXTURE_2D;
  width = width || options.width;
  height = height || options.height;
  gl.bindTexture(target, tex);

  if (canGenerateMipmap(gl, width, height, internalFormat)) {
    gl.generateMipmap(target);
  } else {
    const filtering = canFilter(internalFormat) ? LINEAR : NEAREST;
    gl.texParameteri(target, TEXTURE_MIN_FILTER, filtering);
    gl.texParameteri(target, TEXTURE_MAG_FILTER, filtering);
    gl.texParameteri(target, TEXTURE_WRAP_S, CLAMP_TO_EDGE);
    gl.texParameteri(target, TEXTURE_WRAP_T, CLAMP_TO_EDGE);
  }
}

function shouldAutomaticallySetTextureFilteringForSize(options) {
  return options.auto === true || options.auto === undefined && options.level === undefined;
}
/**
 * Gets an array of cubemap face enums
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {module:twgl.TextureOptions} options A TextureOptions object with whatever parameters you want set.
 *   This is often the same options you passed in when you created the texture.
 * @return {number[]} cubemap face enums
 * @private
 */


function getCubeFaceOrder(gl, options) {
  options = options || {};
  return options.cubeFaceOrder || [TEXTURE_CUBE_MAP_POSITIVE_X, TEXTURE_CUBE_MAP_NEGATIVE_X, TEXTURE_CUBE_MAP_POSITIVE_Y, TEXTURE_CUBE_MAP_NEGATIVE_Y, TEXTURE_CUBE_MAP_POSITIVE_Z, TEXTURE_CUBE_MAP_NEGATIVE_Z];
}
/**
 * @typedef {Object} FaceInfo
 * @property {number} face gl enum for texImage2D
 * @property {number} ndx face index (0 - 5) into source data
 * @ignore
 */

/**
 * Gets an array of FaceInfos
 * There's a bug in some NVidia drivers that will crash the driver if
 * `gl.TEXTURE_CUBE_MAP_POSITIVE_X` is not uploaded first. So, we take
 * the user's desired order from his faces to WebGL and make sure we
 * do the faces in WebGL order
 *
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {module:twgl.TextureOptions} options A TextureOptions object with whatever parameters you want set.
 * @return {FaceInfo[]} cubemap face infos. Arguably the `face` property of each element is redundant but
 *    it's needed internally to sort the array of `ndx` properties by `face`.
 * @private
 */


function getCubeFacesWithNdx(gl, options) {
  const faces = getCubeFaceOrder(gl, options); // work around bug in NVidia drivers. We have to upload the first face first else the driver crashes :(

  const facesWithNdx = faces.map(function (face, ndx) {
    return {
      face: face,
      ndx: ndx
    };
  });
  facesWithNdx.sort(function (a, b) {
    return a.face - b.face;
  });
  return facesWithNdx;
}
/**
 * Set a texture from the contents of an element. Will also set
 * texture filtering or generate mips based on the dimensions of the element
 * unless `options.auto === false`. If `target === gl.TEXTURE_CUBE_MAP` will
 * attempt to slice image into 1x6, 2x3, 3x2, or 6x1 images, one for each face.
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {WebGLTexture} tex the WebGLTexture to set parameters for
 * @param {HTMLElement} element a canvas, img, or video element.
 * @param {module:twgl.TextureOptions} [options] A TextureOptions object with whatever parameters you want set.
 *   This is often the same options you passed in when you created the texture.
 * @memberOf module:twgl/textures
 * @kind function
 */


function setTextureFromElement(gl, tex, element, options) {
  options = options || defaults$1.textureOptions;
  const target = options.target || TEXTURE_2D;
  const level = options.level || 0;
  let width = element.width;
  let height = element.height;
  const internalFormat = options.internalFormat || options.format || RGBA;
  const formatType = getFormatAndTypeForInternalFormat(internalFormat);
  const format = options.format || formatType.format;
  const type = options.type || formatType.type;
  setPackState(gl, options);
  gl.bindTexture(target, tex);

  if (target === TEXTURE_CUBE_MAP) {
    // guess the parts
    const imgWidth = element.width;
    const imgHeight = element.height;
    let size;
    let slices;

    if (imgWidth / 6 === imgHeight) {
      // It's 6x1
      size = imgHeight;
      slices = [0, 0, 1, 0, 2, 0, 3, 0, 4, 0, 5, 0];
    } else if (imgHeight / 6 === imgWidth) {
      // It's 1x6
      size = imgWidth;
      slices = [0, 0, 0, 1, 0, 2, 0, 3, 0, 4, 0, 5];
    } else if (imgWidth / 3 === imgHeight / 2) {
      // It's 3x2
      size = imgWidth / 3;
      slices = [0, 0, 1, 0, 2, 0, 0, 1, 1, 1, 2, 1];
    } else if (imgWidth / 2 === imgHeight / 3) {
      // It's 2x3
      size = imgWidth / 2;
      slices = [0, 0, 1, 0, 0, 1, 1, 1, 0, 2, 1, 2];
    } else {
      throw "can't figure out cube map from element: " + (element.src ? element.src : element.nodeName);
    }

    const ctx = getShared2DContext();

    if (ctx) {
      ctx.canvas.width = size;
      ctx.canvas.height = size;
      width = size;
      height = size;
      getCubeFacesWithNdx(gl, options).forEach(function (f) {
        const xOffset = slices[f.ndx * 2 + 0] * size;
        const yOffset = slices[f.ndx * 2 + 1] * size;
        ctx.drawImage(element, xOffset, yOffset, size, size, 0, 0, size, size);
        gl.texImage2D(f.face, level, internalFormat, format, type, ctx.canvas);
      }); // Free up the canvas memory

      ctx.canvas.width = 1;
      ctx.canvas.height = 1;
    } else if (typeof createImageBitmap !== 'undefined') {
      // NOTE: It seems like we should prefer ImageBitmap because unlike canvas it's
      // note lossy? (alpha is not premultiplied? although I'm not sure what
      width = size;
      height = size;
      getCubeFacesWithNdx(gl, options).forEach(function (f) {
        const xOffset = slices[f.ndx * 2 + 0] * size;
        const yOffset = slices[f.ndx * 2 + 1] * size; // We can't easily use a default texture color here as it would have to match
        // the type across all faces where as with a 2D one there's only one face
        // so we're replacing everything all at once. It also has to be the correct size.
        // On the other hand we need all faces to be the same size so as one face loads
        // the rest match else the texture will be un-renderable.

        gl.texImage2D(f.face, level, internalFormat, size, size, 0, format, type, null);
        createImageBitmap(element, xOffset, yOffset, size, size, {
          premultiplyAlpha: 'none',
          colorSpaceConversion: 'none'
        }).then(function (imageBitmap) {
          setPackState(gl, options);
          gl.bindTexture(target, tex);
          gl.texImage2D(f.face, level, internalFormat, format, type, imageBitmap);

          if (shouldAutomaticallySetTextureFilteringForSize(options)) {
            setTextureFilteringForSize(gl, tex, options, width, height, internalFormat);
          }
        });
      });
    }
  } else if (target === TEXTURE_3D || target === TEXTURE_2D_ARRAY) {
    const smallest = Math.min(element.width, element.height);
    const largest = Math.max(element.width, element.height);
    const depth = largest / smallest;

    if (depth % 1 !== 0) {
      throw "can not compute 3D dimensions of element";
    }

    const xMult = element.width === largest ? 1 : 0;
    const yMult = element.height === largest ? 1 : 0;
    gl.pixelStorei(UNPACK_ALIGNMENT, 1);
    gl.pixelStorei(UNPACK_ROW_LENGTH, element.width);
    gl.pixelStorei(UNPACK_IMAGE_HEIGHT, 0);
    gl.pixelStorei(UNPACK_SKIP_IMAGES, 0);
    gl.texImage3D(target, level, internalFormat, smallest, smallest, smallest, 0, format, type, null);

    for (let d = 0; d < depth; ++d) {
      const srcX = d * smallest * xMult;
      const srcY = d * smallest * yMult;
      gl.pixelStorei(UNPACK_SKIP_PIXELS, srcX);
      gl.pixelStorei(UNPACK_SKIP_ROWS, srcY);
      gl.texSubImage3D(target, level, 0, 0, d, smallest, smallest, 1, format, type, element);
    }

    setSkipStateToDefault(gl);
  } else {
    gl.texImage2D(target, level, internalFormat, format, type, element);
  }

  if (shouldAutomaticallySetTextureFilteringForSize(options)) {
    setTextureFilteringForSize(gl, tex, options, width, height, internalFormat);
  }

  setTextureParameters(gl, tex, options);
}

function noop() {}
/**
 * Checks whether the url's origin is the same so that we can set the `crossOrigin`
 * @param {string} url url to image
 * @returns {boolean} true if the window's origin is the same as image's url
 * @private
 */


function urlIsSameOrigin(url) {
  if (typeof document !== 'undefined') {
    // for IE really
    const a = document.createElement('a');
    a.href = url;
    return a.hostname === location.hostname && a.port === location.port && a.protocol === location.protocol;
  } else {
    const localOrigin = new URL(location.href).origin;
    const urlOrigin = new URL(url, location.href).origin;
    return urlOrigin === localOrigin;
  }
}

function setToAnonymousIfUndefinedAndURLIsNotSameOrigin(url, crossOrigin) {
  return crossOrigin === undefined && !urlIsSameOrigin(url) ? 'anonymous' : crossOrigin;
}
/**
 * Loads an image
 * @param {string} url url to image
 * @param {string} crossOrigin
 * @param {function(err, img)} [callback] a callback that's passed an error and the image. The error will be non-null
 *     if there was an error
 * @return {HTMLImageElement} the image being loaded.
 * @private
 */


function loadImage(url, crossOrigin, callback) {
  callback = callback || noop;
  let img;
  crossOrigin = crossOrigin !== undefined ? crossOrigin : defaults$1.crossOrigin;
  crossOrigin = setToAnonymousIfUndefinedAndURLIsNotSameOrigin(url, crossOrigin);

  if (typeof Image !== 'undefined') {
    img = new Image();

    if (crossOrigin !== undefined) {
      img.crossOrigin = crossOrigin;
    }

    const clearEventHandlers = function clearEventHandlers() {
      img.removeEventListener('error', onError); // eslint-disable-line

      img.removeEventListener('load', onLoad); // eslint-disable-line

      img = null;
    };

    const onError = function onError() {
      const msg = "couldn't load image: " + url;
      error(msg);
      callback(msg, img);
      clearEventHandlers();
    };

    const onLoad = function onLoad() {
      callback(null, img);
      clearEventHandlers();
    };

    img.addEventListener('error', onError);
    img.addEventListener('load', onLoad);
    img.src = url;
    return img;
  } else if (typeof ImageBitmap !== 'undefined') {
    let err;
    let bm;

    const cb = function cb() {
      callback(err, bm);
    };

    const options = {};

    if (crossOrigin) {
      options.mode = 'cors'; // TODO: not sure how to translate image.crossOrigin
    }

    fetch(url, options).then(function (response) {
      if (!response.ok) {
        throw response;
      }

      return response.blob();
    }).then(function (blob) {
      return createImageBitmap(blob, {
        premultiplyAlpha: 'none',
        colorSpaceConversion: 'none'
      });
    }).then(function (bitmap) {
      // not sure if this works. We don't want
      // to catch the user's error. So, call
      // the callback in a timeout so we're
      // not in this scope inside the promise.
      bm = bitmap;
      setTimeout(cb);
    }).catch(function (e) {
      err = e;
      setTimeout(cb);
    });
    img = null;
  }

  return img;
}
/**
 * check if object is a TexImageSource
 *
 * @param {Object} obj Object to test
 * @return {boolean} true if object is a TexImageSource
 * @private
 */


function isTexImageSource(obj) {
  return typeof ImageBitmap !== 'undefined' && obj instanceof ImageBitmap || typeof ImageData !== 'undefined' && obj instanceof ImageData || typeof HTMLElement !== 'undefined' && obj instanceof HTMLElement;
}
/**
 * if obj is an TexImageSource then just
 * uses it otherwise if obj is a string
 * then load it first.
 *
 * @param {string|TexImageSource} obj
 * @param {string} crossOrigin
 * @param {function(err, img)} [callback] a callback that's passed an error and the image. The error will be non-null
 *     if there was an error
 * @private
 */


function loadAndUseImage(obj, crossOrigin, callback) {
  if (isTexImageSource(obj)) {
    setTimeout(function () {
      callback(null, obj);
    });
    return obj;
  }

  return loadImage(obj, crossOrigin, callback);
}
/**
 * Sets a texture to a 1x1 pixel color. If `options.color === false` is nothing happens. If it's not set
 * the default texture color is used which can be set by calling `setDefaultTextureColor`.
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {WebGLTexture} tex the WebGLTexture to set parameters for
 * @param {module:twgl.TextureOptions} [options] A TextureOptions object with whatever parameters you want set.
 *   This is often the same options you passed in when you created the texture.
 * @memberOf module:twgl/textures
 */


function setTextureTo1PixelColor(gl, tex, options) {
  options = options || defaults$1.textureOptions;
  const target = options.target || TEXTURE_2D;
  gl.bindTexture(target, tex);

  if (options.color === false) {
    return;
  } // Assume it's a URL
  // Put 1x1 pixels in texture. That makes it renderable immediately regardless of filtering.


  const color = make1Pixel(options.color);

  if (target === TEXTURE_CUBE_MAP) {
    for (let ii = 0; ii < 6; ++ii) {
      gl.texImage2D(TEXTURE_CUBE_MAP_POSITIVE_X + ii, 0, RGBA, 1, 1, 0, RGBA, UNSIGNED_BYTE$2, color);
    }
  } else if (target === TEXTURE_3D || target === TEXTURE_2D_ARRAY) {
    gl.texImage3D(target, 0, RGBA, 1, 1, 1, 0, RGBA, UNSIGNED_BYTE$2, color);
  } else {
    gl.texImage2D(target, 0, RGBA, 1, 1, 0, RGBA, UNSIGNED_BYTE$2, color);
  }
}
/**
 * The src image(s) used to create a texture.
 *
 * When you call {@link module:twgl.createTexture} or {@link module:twgl.createTextures}
 * you can pass in urls for images to load into the textures. If it's a single url
 * then this will be a single HTMLImageElement. If it's an array of urls used for a cubemap
 * this will be a corresponding array of images for the cubemap.
 *
 * @typedef {HTMLImageElement|HTMLImageElement[]} TextureSrc
 * @memberOf module:twgl
 */

/**
 * A callback for when an image finished downloading and been uploaded into a texture
 * @callback TextureReadyCallback
 * @param {*} err If truthy there was an error.
 * @param {WebGLTexture} texture the texture.
 * @param {module:twgl.TextureSrc} source image(s) used to as the src for the texture
 * @memberOf module:twgl
 */

/**
 * A callback for when all images have finished downloading and been uploaded into their respective textures
 * @callback TexturesReadyCallback
 * @param {*} err If truthy there was an error.
 * @param {Object.<string, WebGLTexture>} textures the created textures by name. Same as returned by {@link module:twgl.createTextures}.
 * @param {Object.<string, module:twgl.TextureSrc>} sources the image(s) used for the texture by name.
 * @memberOf module:twgl
 */

/**
 * A callback for when an image finished downloading and been uploaded into a texture
 * @callback CubemapReadyCallback
 * @param {*} err If truthy there was an error.
 * @param {WebGLTexture} tex the texture.
 * @param {HTMLImageElement[]} imgs the images for each face.
 * @memberOf module:twgl
 */

/**
 * A callback for when an image finished downloading and been uploaded into a texture
 * @callback ThreeDReadyCallback
 * @param {*} err If truthy there was an error.
 * @param {WebGLTexture} tex the texture.
 * @param {HTMLImageElement[]} imgs the images for each slice.
 * @memberOf module:twgl
 */

/**
 * Loads a texture from an image from a Url as specified in `options.src`
 * If `options.color !== false` will set the texture to a 1x1 pixel color so that the texture is
 * immediately useable. It will be updated with the contents of the image once the image has finished
 * downloading. Filtering options will be set as appropriate for image unless `options.auto === false`.
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {WebGLTexture} tex the WebGLTexture to set parameters for
 * @param {module:twgl.TextureOptions} [options] A TextureOptions object with whatever parameters you want set.
 * @param {module:twgl.TextureReadyCallback} [callback] A function to be called when the image has finished loading. err will
 *    be non null if there was an error.
 * @return {HTMLImageElement} the image being downloaded.
 * @memberOf module:twgl/textures
 */


function loadTextureFromUrl(gl, tex, options, callback) {
  callback = callback || noop;
  options = options || defaults$1.textureOptions;
  setTextureTo1PixelColor(gl, tex, options); // Because it's async we need to copy the options.

  options = Object.assign({}, options);
  const img = loadAndUseImage(options.src, options.crossOrigin, function (err, img) {
    if (err) {
      callback(err, tex, img);
    } else {
      setTextureFromElement(gl, tex, img, options);
      callback(null, tex, img);
    }
  });
  return img;
}
/**
 * Loads a cubemap from 6 urls or TexImageSources as specified in `options.src`. Will set the cubemap to a 1x1 pixel color
 * so that it is usable immediately unless `option.color === false`.
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {WebGLTexture} tex the WebGLTexture to set parameters for
 * @param {module:twgl.TextureOptions} options A TextureOptions object with whatever parameters you want set.
 * @param {module:twgl.CubemapReadyCallback} [callback] A function to be called when all the images have finished loading. err will
 *    be non null if there was an error.
 * @memberOf module:twgl/textures
 */


function loadCubemapFromUrls(gl, tex, options, callback) {
  callback = callback || noop;
  const urls = options.src;

  if (urls.length !== 6) {
    throw "there must be 6 urls for a cubemap";
  }

  const level = options.level || 0;
  const internalFormat = options.internalFormat || options.format || RGBA;
  const formatType = getFormatAndTypeForInternalFormat(internalFormat);
  const format = options.format || formatType.format;
  const type = options.type || UNSIGNED_BYTE$2;
  const target = options.target || TEXTURE_2D;

  if (target !== TEXTURE_CUBE_MAP) {
    throw "target must be TEXTURE_CUBE_MAP";
  }

  setTextureTo1PixelColor(gl, tex, options); // Because it's async we need to copy the options.

  options = Object.assign({}, options);
  let numToLoad = 6;
  const errors = [];
  const faces = getCubeFaceOrder(gl, options);
  let imgs; // eslint-disable-line

  function uploadImg(faceTarget) {
    return function (err, img) {
      --numToLoad;

      if (err) {
        errors.push(err);
      } else {
        if (img.width !== img.height) {
          errors.push("cubemap face img is not a square: " + img.src);
        } else {
          setPackState(gl, options);
          gl.bindTexture(target, tex); // So assuming this is the first image we now have one face that's img sized
          // and 5 faces that are 1x1 pixel so size the other faces

          if (numToLoad === 5) {
            // use the default order
            getCubeFaceOrder().forEach(function (otherTarget) {
              // Should we re-use the same face or a color?
              gl.texImage2D(otherTarget, level, internalFormat, format, type, img);
            });
          } else {
            gl.texImage2D(faceTarget, level, internalFormat, format, type, img);
          }

          if (shouldAutomaticallySetTextureFilteringForSize(options)) {
            gl.generateMipmap(target);
          }
        }
      }

      if (numToLoad === 0) {
        callback(errors.length ? errors : undefined, tex, imgs);
      }
    };
  }

  imgs = urls.map(function (url, ndx) {
    return loadAndUseImage(url, options.crossOrigin, uploadImg(faces[ndx]));
  });
}
/**
 * Loads a 2d array or 3d texture from urls OR TexImageSources as specified in `options.src`.
 * Will set the texture to a 1x1 pixel color
 * so that it is usable immediately unless `option.color === false`.
 *
 * If the width and height is not specified the width and height of the first
 * image loaded will be used. Note that since images are loaded async
 * which image downloads first is unknown.
 *
 * If an image is not the same size as the width and height it will be scaled
 * to that width and height.
 *
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {WebGLTexture} tex the WebGLTexture to set parameters for
 * @param {module:twgl.TextureOptions} options A TextureOptions object with whatever parameters you want set.
 * @param {module:twgl.ThreeDReadyCallback} [callback] A function to be called when all the images have finished loading. err will
 *    be non null if there was an error.
 * @memberOf module:twgl/textures
 */


function loadSlicesFromUrls(gl, tex, options, callback) {
  callback = callback || noop;
  const urls = options.src;
  const internalFormat = options.internalFormat || options.format || RGBA;
  const formatType = getFormatAndTypeForInternalFormat(internalFormat);
  const format = options.format || formatType.format;
  const type = options.type || UNSIGNED_BYTE$2;
  const target = options.target || TEXTURE_2D_ARRAY;

  if (target !== TEXTURE_3D && target !== TEXTURE_2D_ARRAY) {
    throw "target must be TEXTURE_3D or TEXTURE_2D_ARRAY";
  }

  setTextureTo1PixelColor(gl, tex, options); // Because it's async we need to copy the options.

  options = Object.assign({}, options);
  let numToLoad = urls.length;
  const errors = [];
  let imgs; // eslint-disable-line

  const level = options.level || 0;
  let width = options.width;
  let height = options.height;
  const depth = urls.length;
  let firstImage = true;

  function uploadImg(slice) {
    return function (err, img) {
      --numToLoad;

      if (err) {
        errors.push(err);
      } else {
        setPackState(gl, options);
        gl.bindTexture(target, tex);

        if (firstImage) {
          firstImage = false;
          width = options.width || img.width;
          height = options.height || img.height;
          gl.texImage3D(target, level, internalFormat, width, height, depth, 0, format, type, null); // put it in every slice otherwise some slices will be 0,0,0,0

          for (let s = 0; s < depth; ++s) {
            gl.texSubImage3D(target, level, 0, 0, s, width, height, 1, format, type, img);
          }
        } else {
          let src = img;
          let ctx;

          if (img.width !== width || img.height !== height) {
            // Size the image to fix
            ctx = getShared2DContext();
            src = ctx.canvas;
            ctx.canvas.width = width;
            ctx.canvas.height = height;
            ctx.drawImage(img, 0, 0, width, height);
          }

          gl.texSubImage3D(target, level, 0, 0, slice, width, height, 1, format, type, src); // free the canvas memory

          if (ctx && src === ctx.canvas) {
            ctx.canvas.width = 0;
            ctx.canvas.height = 0;
          }
        }

        if (shouldAutomaticallySetTextureFilteringForSize(options)) {
          gl.generateMipmap(target);
        }
      }

      if (numToLoad === 0) {
        callback(errors.length ? errors : undefined, tex, imgs);
      }
    };
  }

  imgs = urls.map(function (url, ndx) {
    return loadAndUseImage(url, options.crossOrigin, uploadImg(ndx));
  });
}
/**
 * Sets a texture from an array or typed array. If the width or height is not provided will attempt to
 * guess the size. See {@link module:twgl.TextureOptions}.
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {WebGLTexture} tex the WebGLTexture to set parameters for
 * @param {(number[]|ArrayBufferView)} src An array or typed arry with texture data.
 * @param {module:twgl.TextureOptions} [options] A TextureOptions object with whatever parameters you want set.
 *   This is often the same options you passed in when you created the texture.
 * @memberOf module:twgl/textures
 */


function setTextureFromArray(gl, tex, src, options) {
  options = options || defaults$1.textureOptions;
  const target = options.target || TEXTURE_2D;
  gl.bindTexture(target, tex);
  let width = options.width;
  let height = options.height;
  let depth = options.depth;
  const level = options.level || 0;
  const internalFormat = options.internalFormat || options.format || RGBA;
  const formatType = getFormatAndTypeForInternalFormat(internalFormat);
  const format = options.format || formatType.format;
  const type = options.type || getTextureTypeForArrayType(gl, src, formatType.type);

  if (!isArrayBuffer$1(src)) {
    const Type = getTypedArrayTypeForGLType(type);
    src = new Type(src);
  } else if (src instanceof Uint8ClampedArray) {
    src = new Uint8Array(src.buffer);
  }

  const bytesPerElement = getBytesPerElementForInternalFormat(internalFormat, type);
  const numElements = src.byteLength / bytesPerElement; // TODO: check UNPACK_ALIGNMENT?

  if (numElements % 1) {
    throw "length wrong size for format: " + glEnumToString(gl, format);
  }

  let dimensions;

  if (target === TEXTURE_3D || target === TEXTURE_2D_ARRAY) {
    if (!width && !height && !depth) {
      const size = Math.cbrt(numElements);

      if (size % 1 !== 0) {
        throw "can't guess cube size of array of numElements: " + numElements;
      }

      width = size;
      height = size;
      depth = size;
    } else if (width && (!height || !depth)) {
      dimensions = guessDimensions(gl, target, height, depth, numElements / width);
      height = dimensions.width;
      depth = dimensions.height;
    } else if (height && (!width || !depth)) {
      dimensions = guessDimensions(gl, target, width, depth, numElements / height);
      width = dimensions.width;
      depth = dimensions.height;
    } else {
      dimensions = guessDimensions(gl, target, width, height, numElements / depth);
      width = dimensions.width;
      height = dimensions.height;
    }
  } else {
    dimensions = guessDimensions(gl, target, width, height, numElements);
    width = dimensions.width;
    height = dimensions.height;
  }

  setSkipStateToDefault(gl);
  gl.pixelStorei(UNPACK_ALIGNMENT, options.unpackAlignment || 1);
  setPackState(gl, options);

  if (target === TEXTURE_CUBE_MAP) {
    const elementsPerElement = bytesPerElement / src.BYTES_PER_ELEMENT;
    const faceSize = numElements / 6 * elementsPerElement;
    getCubeFacesWithNdx(gl, options).forEach(f => {
      const offset = faceSize * f.ndx;
      const data = src.subarray(offset, offset + faceSize);
      gl.texImage2D(f.face, level, internalFormat, width, height, 0, format, type, data);
    });
  } else if (target === TEXTURE_3D || target === TEXTURE_2D_ARRAY) {
    gl.texImage3D(target, level, internalFormat, width, height, depth, 0, format, type, src);
  } else {
    gl.texImage2D(target, level, internalFormat, width, height, 0, format, type, src);
  }

  return {
    width: width,
    height: height,
    depth: depth,
    type: type
  };
}
/**
 * Sets a texture with no contents of a certain size. In other words calls `gl.texImage2D` with `null`.
 * You must set `options.width` and `options.height`.
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {WebGLTexture} tex the WebGLTexture to set parameters for
 * @param {module:twgl.TextureOptions} options A TextureOptions object with whatever parameters you want set.
 * @memberOf module:twgl/textures
 */


function setEmptyTexture(gl, tex, options) {
  const target = options.target || TEXTURE_2D;
  gl.bindTexture(target, tex);
  const level = options.level || 0;
  const internalFormat = options.internalFormat || options.format || RGBA;
  const formatType = getFormatAndTypeForInternalFormat(internalFormat);
  const format = options.format || formatType.format;
  const type = options.type || formatType.type;
  setPackState(gl, options);

  if (target === TEXTURE_CUBE_MAP) {
    for (let ii = 0; ii < 6; ++ii) {
      gl.texImage2D(TEXTURE_CUBE_MAP_POSITIVE_X + ii, level, internalFormat, options.width, options.height, 0, format, type, null);
    }
  } else if (target === TEXTURE_3D || target === TEXTURE_2D_ARRAY) {
    gl.texImage3D(target, level, internalFormat, options.width, options.height, options.depth, 0, format, type, null);
  } else {
    gl.texImage2D(target, level, internalFormat, options.width, options.height, 0, format, type, null);
  }
}
/**
 * Creates a texture based on the options passed in.
 *
 * Note: may reset UNPACK_ALIGNMENT, UNPACK_ROW_LENGTH, UNPACK_IMAGE_HEIGHT, UNPACK_SKIP_IMAGES
 * UNPACK_SKIP_PIXELS, and UNPACK_SKIP_ROWS
 *
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {module:twgl.TextureOptions} [options] A TextureOptions object with whatever parameters you want set.
 * @param {module:twgl.TextureReadyCallback} [callback] A callback called when an image has been downloaded and uploaded to the texture.
 * @return {WebGLTexture} the created texture.
 * @memberOf module:twgl/textures
 */


function createTexture(gl, options, callback) {
  callback = callback || noop;
  options = options || defaults$1.textureOptions;
  const tex = gl.createTexture();
  const target = options.target || TEXTURE_2D;
  let width = options.width || 1;
  let height = options.height || 1;
  const internalFormat = options.internalFormat || RGBA;
  gl.bindTexture(target, tex);

  if (target === TEXTURE_CUBE_MAP) {
    // this should have been the default for cubemaps :(
    gl.texParameteri(target, TEXTURE_WRAP_S, CLAMP_TO_EDGE);
    gl.texParameteri(target, TEXTURE_WRAP_T, CLAMP_TO_EDGE);
  }

  let src = options.src;

  if (src) {
    if (typeof src === "function") {
      src = src(gl, options);
    }

    if (typeof src === "string") {
      loadTextureFromUrl(gl, tex, options, callback);
    } else if (isArrayBuffer$1(src) || Array.isArray(src) && (typeof src[0] === 'number' || Array.isArray(src[0]) || isArrayBuffer$1(src[0]))) {
      const dimensions = setTextureFromArray(gl, tex, src, options);
      width = dimensions.width;
      height = dimensions.height;
    } else if (Array.isArray(src) && (typeof src[0] === 'string' || isTexImageSource(src[0]))) {
      if (target === TEXTURE_CUBE_MAP) {
        loadCubemapFromUrls(gl, tex, options, callback);
      } else {
        loadSlicesFromUrls(gl, tex, options, callback);
      }
    } else {
      // if (isTexImageSource(src))
      setTextureFromElement(gl, tex, src, options);
      width = src.width;
      height = src.height;
    }
  } else {
    setEmptyTexture(gl, tex, options);
  }

  if (shouldAutomaticallySetTextureFilteringForSize(options)) {
    setTextureFilteringForSize(gl, tex, options, width, height, internalFormat);
  }

  setTextureParameters(gl, tex, options);
  return tex;
}
/**
 * Resizes a texture based on the options passed in.
 *
 * Note: This is not a generic resize anything function.
 * It's mostly used by {@link module:twgl.resizeFramebufferInfo}
 * It will use `options.src` if it exists to try to determine a `type`
 * otherwise it will assume `gl.UNSIGNED_BYTE`. No data is provided
 * for the texture. Texture parameters will be set accordingly
 *
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {WebGLTexture} tex the texture to resize
 * @param {module:twgl.TextureOptions} options A TextureOptions object with whatever parameters you want set.
 * @param {number} [width] the new width. If not passed in will use `options.width`
 * @param {number} [height] the new height. If not passed in will use `options.height`
 * @param {number} [depth] the new depth. If not passed in will use `options.depth`
 * @memberOf module:twgl/textures
 */


function resizeTexture(gl, tex, options, width, height, depth) {
  width = width || options.width;
  height = height || options.height;
  depth = depth || options.depth;
  const target = options.target || TEXTURE_2D;
  gl.bindTexture(target, tex);
  const level = options.level || 0;
  const internalFormat = options.internalFormat || options.format || RGBA;
  const formatType = getFormatAndTypeForInternalFormat(internalFormat);
  const format = options.format || formatType.format;
  let type;
  const src = options.src;

  if (!src) {
    type = options.type || formatType.type;
  } else if (isArrayBuffer$1(src) || Array.isArray(src) && typeof src[0] === 'number') {
    type = options.type || getTextureTypeForArrayType(gl, src, formatType.type);
  } else {
    type = options.type || formatType.type;
  }

  if (target === TEXTURE_CUBE_MAP) {
    for (let ii = 0; ii < 6; ++ii) {
      gl.texImage2D(TEXTURE_CUBE_MAP_POSITIVE_X + ii, level, internalFormat, width, height, 0, format, type, null);
    }
  } else if (target === TEXTURE_3D || target === TEXTURE_2D_ARRAY) {
    gl.texImage3D(target, level, internalFormat, width, height, depth, 0, format, type, null);
  } else {
    gl.texImage2D(target, level, internalFormat, width, height, 0, format, type, null);
  }
}
/**
 * Check if a src is an async request.
 * if src is a string we're going to download an image
 * if src is an array of strings we're going to download cubemap images
 * @param {*} src The src from a TextureOptions
 * @returns {bool} true if src is async.
 * @private
 */


function isAsyncSrc(src) {
  return typeof src === 'string' || Array.isArray(src) && typeof src[0] === 'string';
}
/**
 * Creates a bunch of textures based on the passed in options.
 *
 * Example:
 *
 *     const textures = twgl.createTextures(gl, {
 *       // a power of 2 image
 *       hftIcon: { src: "images/hft-icon-16.png", mag: gl.NEAREST },
 *       // a non-power of 2 image
 *       clover: { src: "images/clover.jpg" },
 *       // From a canvas
 *       fromCanvas: { src: ctx.canvas },
 *       // A cubemap from 6 images
 *       yokohama: {
 *         target: gl.TEXTURE_CUBE_MAP,
 *         src: [
 *           'images/yokohama/posx.jpg',
 *           'images/yokohama/negx.jpg',
 *           'images/yokohama/posy.jpg',
 *           'images/yokohama/negy.jpg',
 *           'images/yokohama/posz.jpg',
 *           'images/yokohama/negz.jpg',
 *         ],
 *       },
 *       // A cubemap from 1 image (can be 1x6, 2x3, 3x2, 6x1)
 *       goldengate: {
 *         target: gl.TEXTURE_CUBE_MAP,
 *         src: 'images/goldengate.jpg',
 *       },
 *       // A 2x2 pixel texture from a JavaScript array
 *       checker: {
 *         mag: gl.NEAREST,
 *         min: gl.LINEAR,
 *         src: [
 *           255,255,255,255,
 *           192,192,192,255,
 *           192,192,192,255,
 *           255,255,255,255,
 *         ],
 *       },
 *       // a 1x2 pixel texture from a typed array.
 *       stripe: {
 *         mag: gl.NEAREST,
 *         min: gl.LINEAR,
 *         format: gl.LUMINANCE,
 *         src: new Uint8Array([
 *           255,
 *           128,
 *           255,
 *           128,
 *           255,
 *           128,
 *           255,
 *           128,
 *         ]),
 *         width: 1,
 *       },
 *     });
 *
 * Now
 *
 * *   `textures.hftIcon` will be a 2d texture
 * *   `textures.clover` will be a 2d texture
 * *   `textures.fromCanvas` will be a 2d texture
 * *   `textures.yohohama` will be a cubemap texture
 * *   `textures.goldengate` will be a cubemap texture
 * *   `textures.checker` will be a 2d texture
 * *   `textures.stripe` will be a 2d texture
 *
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {Object.<string,module:twgl.TextureOptions>} options A object of TextureOptions one per texture.
 * @param {module:twgl.TexturesReadyCallback} [callback] A callback called when all textures have been downloaded.
 * @return {Object.<string,WebGLTexture>} the created textures by name
 * @memberOf module:twgl/textures
 */


function createTextures(gl, textureOptions, callback) {
  callback = callback || noop;
  let numDownloading = 0;
  const errors = [];
  const textures = {};
  const images = {};

  function callCallbackIfReady() {
    if (numDownloading === 0) {
      setTimeout(function () {
        callback(errors.length ? errors : undefined, textures, images);
      }, 0);
    }
  }

  Object.keys(textureOptions).forEach(function (name) {
    const options = textureOptions[name];
    let onLoadFn;

    if (isAsyncSrc(options.src)) {
      onLoadFn = function (err, tex, img) {
        images[name] = img;
        --numDownloading;

        if (err) {
          errors.push(err);
        }

        callCallbackIfReady();
      };

      ++numDownloading;
    }

    textures[name] = createTexture(gl, options, onLoadFn);
  }); // queue the callback if there are no images to download.
  // We do this because if your code is structured to wait for
  // images to download but then you comment out all the async
  // images your code would break.

  callCallbackIfReady();
  return textures;
}

var textures = /*#__PURE__*/Object.freeze({
  __proto__: null,
  setTextureDefaults_: setDefaults$1,
  createSampler: createSampler,
  createSamplers: createSamplers,
  setSamplerParameters: setSamplerParameters,
  createTexture: createTexture,
  setEmptyTexture: setEmptyTexture,
  setTextureFromArray: setTextureFromArray,
  loadTextureFromUrl: loadTextureFromUrl,
  setTextureFromElement: setTextureFromElement,
  setTextureFilteringForSize: setTextureFilteringForSize,
  setTextureParameters: setTextureParameters,
  setDefaultTextureColor: setDefaultTextureColor,
  createTextures: createTextures,
  resizeTexture: resizeTexture,
  canGenerateMipmap: canGenerateMipmap,
  canFilter: canFilter,
  getNumComponentsForFormat: getNumComponentsForFormat,
  getBytesPerElementForInternalFormat: getBytesPerElementForInternalFormat,
  getFormatAndTypeForInternalFormat: getFormatAndTypeForInternalFormat
});
/*
 * Copyright 2019 Gregg Tavares
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

/**
 * Low level shader program related functions
 *
 * You should generally not need to use these functions. They are provided
 * for those cases where you're doing something out of the ordinary
 * and you need lower level access.
 *
 * For backward compatibility they are available at both `twgl.programs` and `twgl`
 * itself
 *
 * See {@link module:twgl} for core functions
 *
 * @module twgl/programs
 */

exports.textures = textures;
const error$1 = error;
const warn$1 = warn;

function getElementById(id) {
  return typeof document !== 'undefined' && document.getElementById ? document.getElementById(id) : null;
}

const TEXTURE0 = 0x84c0;
const DYNAMIC_DRAW = 0x88e8;
const ARRAY_BUFFER$1 = 0x8892;
const ELEMENT_ARRAY_BUFFER$1 = 0x8893;
const UNIFORM_BUFFER = 0x8a11;
const TRANSFORM_FEEDBACK_BUFFER = 0x8c8e;
const TRANSFORM_FEEDBACK = 0x8e22;
const COMPILE_STATUS = 0x8b81;
const LINK_STATUS = 0x8b82;
const FRAGMENT_SHADER = 0x8b30;
const VERTEX_SHADER = 0x8b31;
const SEPARATE_ATTRIBS = 0x8c8d;
const ACTIVE_UNIFORMS = 0x8b86;
const ACTIVE_ATTRIBUTES = 0x8b89;
const TRANSFORM_FEEDBACK_VARYINGS = 0x8c83;
const ACTIVE_UNIFORM_BLOCKS = 0x8a36;
const UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER = 0x8a44;
const UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER = 0x8a46;
const UNIFORM_BLOCK_DATA_SIZE = 0x8a40;
const UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES = 0x8a43;
const FLOAT$3 = 0x1406;
const FLOAT_VEC2 = 0x8B50;
const FLOAT_VEC3 = 0x8B51;
const FLOAT_VEC4 = 0x8B52;
const INT$3 = 0x1404;
const INT_VEC2 = 0x8B53;
const INT_VEC3 = 0x8B54;
const INT_VEC4 = 0x8B55;
const BOOL = 0x8B56;
const BOOL_VEC2 = 0x8B57;
const BOOL_VEC3 = 0x8B58;
const BOOL_VEC4 = 0x8B59;
const FLOAT_MAT2 = 0x8B5A;
const FLOAT_MAT3 = 0x8B5B;
const FLOAT_MAT4 = 0x8B5C;
const SAMPLER_2D = 0x8B5E;
const SAMPLER_CUBE = 0x8B60;
const SAMPLER_3D = 0x8B5F;
const SAMPLER_2D_SHADOW = 0x8B62;
const FLOAT_MAT2x3 = 0x8B65;
const FLOAT_MAT2x4 = 0x8B66;
const FLOAT_MAT3x2 = 0x8B67;
const FLOAT_MAT3x4 = 0x8B68;
const FLOAT_MAT4x2 = 0x8B69;
const FLOAT_MAT4x3 = 0x8B6A;
const SAMPLER_2D_ARRAY = 0x8DC1;
const SAMPLER_2D_ARRAY_SHADOW = 0x8DC4;
const SAMPLER_CUBE_SHADOW = 0x8DC5;
const UNSIGNED_INT$3 = 0x1405;
const UNSIGNED_INT_VEC2 = 0x8DC6;
const UNSIGNED_INT_VEC3 = 0x8DC7;
const UNSIGNED_INT_VEC4 = 0x8DC8;
const INT_SAMPLER_2D = 0x8DCA;
const INT_SAMPLER_3D = 0x8DCB;
const INT_SAMPLER_CUBE = 0x8DCC;
const INT_SAMPLER_2D_ARRAY = 0x8DCF;
const UNSIGNED_INT_SAMPLER_2D = 0x8DD2;
const UNSIGNED_INT_SAMPLER_3D = 0x8DD3;
const UNSIGNED_INT_SAMPLER_CUBE = 0x8DD4;
const UNSIGNED_INT_SAMPLER_2D_ARRAY = 0x8DD7;
const TEXTURE_2D$1 = 0x0DE1;
const TEXTURE_CUBE_MAP$1 = 0x8513;
const TEXTURE_3D$1 = 0x806F;
const TEXTURE_2D_ARRAY$1 = 0x8C1A;
const typeMap = {};
/**
 * Returns the corresponding bind point for a given sampler type
 */

function getBindPointForSamplerType(gl, type) {
  return typeMap[type].bindPoint;
} // This kind of sucks! If you could compose functions as in `var fn = gl[name];`
// this code could be a lot smaller but that is sadly really slow (T_T)


function floatSetter(gl, location) {
  return function (v) {
    gl.uniform1f(location, v);
  };
}

function floatArraySetter(gl, location) {
  return function (v) {
    gl.uniform1fv(location, v);
  };
}

function floatVec2Setter(gl, location) {
  return function (v) {
    gl.uniform2fv(location, v);
  };
}

function floatVec3Setter(gl, location) {
  return function (v) {
    gl.uniform3fv(location, v);
  };
}

function floatVec4Setter(gl, location) {
  return function (v) {
    gl.uniform4fv(location, v);
  };
}

function intSetter(gl, location) {
  return function (v) {
    gl.uniform1i(location, v);
  };
}

function intArraySetter(gl, location) {
  return function (v) {
    gl.uniform1iv(location, v);
  };
}

function intVec2Setter(gl, location) {
  return function (v) {
    gl.uniform2iv(location, v);
  };
}

function intVec3Setter(gl, location) {
  return function (v) {
    gl.uniform3iv(location, v);
  };
}

function intVec4Setter(gl, location) {
  return function (v) {
    gl.uniform4iv(location, v);
  };
}

function uintSetter(gl, location) {
  return function (v) {
    gl.uniform1ui(location, v);
  };
}

function uintArraySetter(gl, location) {
  return function (v) {
    gl.uniform1uiv(location, v);
  };
}

function uintVec2Setter(gl, location) {
  return function (v) {
    gl.uniform2uiv(location, v);
  };
}

function uintVec3Setter(gl, location) {
  return function (v) {
    gl.uniform3uiv(location, v);
  };
}

function uintVec4Setter(gl, location) {
  return function (v) {
    gl.uniform4uiv(location, v);
  };
}

function floatMat2Setter(gl, location) {
  return function (v) {
    gl.uniformMatrix2fv(location, false, v);
  };
}

function floatMat3Setter(gl, location) {
  return function (v) {
    gl.uniformMatrix3fv(location, false, v);
  };
}

function floatMat4Setter(gl, location) {
  return function (v) {
    gl.uniformMatrix4fv(location, false, v);
  };
}

function floatMat23Setter(gl, location) {
  return function (v) {
    gl.uniformMatrix2x3fv(location, false, v);
  };
}

function floatMat32Setter(gl, location) {
  return function (v) {
    gl.uniformMatrix3x2fv(location, false, v);
  };
}

function floatMat24Setter(gl, location) {
  return function (v) {
    gl.uniformMatrix2x4fv(location, false, v);
  };
}

function floatMat42Setter(gl, location) {
  return function (v) {
    gl.uniformMatrix4x2fv(location, false, v);
  };
}

function floatMat34Setter(gl, location) {
  return function (v) {
    gl.uniformMatrix3x4fv(location, false, v);
  };
}

function floatMat43Setter(gl, location) {
  return function (v) {
    gl.uniformMatrix4x3fv(location, false, v);
  };
}

function samplerSetter(gl, type, unit, location) {
  const bindPoint = getBindPointForSamplerType(gl, type);
  return isWebGL2(gl) ? function (textureOrPair) {
    let texture;
    let sampler;

    if (isTexture(gl, textureOrPair)) {
      texture = textureOrPair;
      sampler = null;
    } else {
      texture = textureOrPair.texture;
      sampler = textureOrPair.sampler;
    }

    gl.uniform1i(location, unit);
    gl.activeTexture(TEXTURE0 + unit);
    gl.bindTexture(bindPoint, texture);
    gl.bindSampler(unit, sampler);
  } : function (texture) {
    gl.uniform1i(location, unit);
    gl.activeTexture(TEXTURE0 + unit);
    gl.bindTexture(bindPoint, texture);
  };
}

function samplerArraySetter(gl, type, unit, location, size) {
  const bindPoint = getBindPointForSamplerType(gl, type);
  const units = new Int32Array(size);

  for (let ii = 0; ii < size; ++ii) {
    units[ii] = unit + ii;
  }

  return isWebGL2(gl) ? function (textures) {
    gl.uniform1iv(location, units);
    textures.forEach(function (textureOrPair, index) {
      gl.activeTexture(TEXTURE0 + units[index]);
      let texture;
      let sampler;

      if (isTexture(gl, textureOrPair)) {
        texture = textureOrPair;
        sampler = null;
      } else {
        texture = textureOrPair.texture;
        sampler = textureOrPair.sampler;
      }

      gl.bindSampler(unit, sampler);
      gl.bindTexture(bindPoint, texture);
    });
  } : function (textures) {
    gl.uniform1iv(location, units);
    textures.forEach(function (texture, index) {
      gl.activeTexture(TEXTURE0 + units[index]);
      gl.bindTexture(bindPoint, texture);
    });
  };
}

typeMap[FLOAT$3] = {
  Type: Float32Array,
  size: 4,
  setter: floatSetter,
  arraySetter: floatArraySetter
};
typeMap[FLOAT_VEC2] = {
  Type: Float32Array,
  size: 8,
  setter: floatVec2Setter
};
typeMap[FLOAT_VEC3] = {
  Type: Float32Array,
  size: 12,
  setter: floatVec3Setter
};
typeMap[FLOAT_VEC4] = {
  Type: Float32Array,
  size: 16,
  setter: floatVec4Setter
};
typeMap[INT$3] = {
  Type: Int32Array,
  size: 4,
  setter: intSetter,
  arraySetter: intArraySetter
};
typeMap[INT_VEC2] = {
  Type: Int32Array,
  size: 8,
  setter: intVec2Setter
};
typeMap[INT_VEC3] = {
  Type: Int32Array,
  size: 12,
  setter: intVec3Setter
};
typeMap[INT_VEC4] = {
  Type: Int32Array,
  size: 16,
  setter: intVec4Setter
};
typeMap[UNSIGNED_INT$3] = {
  Type: Uint32Array,
  size: 4,
  setter: uintSetter,
  arraySetter: uintArraySetter
};
typeMap[UNSIGNED_INT_VEC2] = {
  Type: Uint32Array,
  size: 8,
  setter: uintVec2Setter
};
typeMap[UNSIGNED_INT_VEC3] = {
  Type: Uint32Array,
  size: 12,
  setter: uintVec3Setter
};
typeMap[UNSIGNED_INT_VEC4] = {
  Type: Uint32Array,
  size: 16,
  setter: uintVec4Setter
};
typeMap[BOOL] = {
  Type: Uint32Array,
  size: 4,
  setter: intSetter,
  arraySetter: intArraySetter
};
typeMap[BOOL_VEC2] = {
  Type: Uint32Array,
  size: 8,
  setter: intVec2Setter
};
typeMap[BOOL_VEC3] = {
  Type: Uint32Array,
  size: 12,
  setter: intVec3Setter
};
typeMap[BOOL_VEC4] = {
  Type: Uint32Array,
  size: 16,
  setter: intVec4Setter
};
typeMap[FLOAT_MAT2] = {
  Type: Float32Array,
  size: 16,
  setter: floatMat2Setter
};
typeMap[FLOAT_MAT3] = {
  Type: Float32Array,
  size: 36,
  setter: floatMat3Setter
};
typeMap[FLOAT_MAT4] = {
  Type: Float32Array,
  size: 64,
  setter: floatMat4Setter
};
typeMap[FLOAT_MAT2x3] = {
  Type: Float32Array,
  size: 24,
  setter: floatMat23Setter
};
typeMap[FLOAT_MAT2x4] = {
  Type: Float32Array,
  size: 32,
  setter: floatMat24Setter
};
typeMap[FLOAT_MAT3x2] = {
  Type: Float32Array,
  size: 24,
  setter: floatMat32Setter
};
typeMap[FLOAT_MAT3x4] = {
  Type: Float32Array,
  size: 48,
  setter: floatMat34Setter
};
typeMap[FLOAT_MAT4x2] = {
  Type: Float32Array,
  size: 32,
  setter: floatMat42Setter
};
typeMap[FLOAT_MAT4x3] = {
  Type: Float32Array,
  size: 48,
  setter: floatMat43Setter
};
typeMap[SAMPLER_2D] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_2D$1
};
typeMap[SAMPLER_CUBE] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_CUBE_MAP$1
};
typeMap[SAMPLER_3D] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_3D$1
};
typeMap[SAMPLER_2D_SHADOW] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_2D$1
};
typeMap[SAMPLER_2D_ARRAY] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_2D_ARRAY$1
};
typeMap[SAMPLER_2D_ARRAY_SHADOW] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_2D_ARRAY$1
};
typeMap[SAMPLER_CUBE_SHADOW] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_CUBE_MAP$1
};
typeMap[INT_SAMPLER_2D] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_2D$1
};
typeMap[INT_SAMPLER_3D] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_3D$1
};
typeMap[INT_SAMPLER_CUBE] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_CUBE_MAP$1
};
typeMap[INT_SAMPLER_2D_ARRAY] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_2D_ARRAY$1
};
typeMap[UNSIGNED_INT_SAMPLER_2D] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_2D$1
};
typeMap[UNSIGNED_INT_SAMPLER_3D] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_3D$1
};
typeMap[UNSIGNED_INT_SAMPLER_CUBE] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_CUBE_MAP$1
};
typeMap[UNSIGNED_INT_SAMPLER_2D_ARRAY] = {
  Type: null,
  size: 0,
  setter: samplerSetter,
  arraySetter: samplerArraySetter,
  bindPoint: TEXTURE_2D_ARRAY$1
};

function floatAttribSetter(gl, index) {
  return function (b) {
    if (b.value) {
      gl.disableVertexAttribArray(index);

      switch (b.value.length) {
        case 4:
          gl.vertexAttrib4fv(index, b.value);
          break;

        case 3:
          gl.vertexAttrib3fv(index, b.value);
          break;

        case 2:
          gl.vertexAttrib2fv(index, b.value);
          break;

        case 1:
          gl.vertexAttrib1fv(index, b.value);
          break;

        default:
          throw new Error('the length of a float constant value must be between 1 and 4!');
      }
    } else {
      gl.bindBuffer(ARRAY_BUFFER$1, b.buffer);
      gl.enableVertexAttribArray(index);
      gl.vertexAttribPointer(index, b.numComponents || b.size, b.type || FLOAT$3, b.normalize || false, b.stride || 0, b.offset || 0);

      if (b.divisor !== undefined) {
        gl.vertexAttribDivisor(index, b.divisor);
      }
    }
  };
}

function intAttribSetter(gl, index) {
  return function (b) {
    if (b.value) {
      gl.disableVertexAttribArray(index);

      if (b.value.length === 4) {
        gl.vertexAttrib4iv(index, b.value);
      } else {
        throw new Error('The length of an integer constant value must be 4!');
      }
    } else {
      gl.bindBuffer(ARRAY_BUFFER$1, b.buffer);
      gl.enableVertexAttribArray(index);
      gl.vertexAttribIPointer(index, b.numComponents || b.size, b.type || INT$3, b.stride || 0, b.offset || 0);

      if (b.divisor !== undefined) {
        gl.vertexAttribDivisor(index, b.divisor);
      }
    }
  };
}

function uintAttribSetter(gl, index) {
  return function (b) {
    if (b.value) {
      gl.disableVertexAttribArray(index);

      if (b.value.length === 4) {
        gl.vertexAttrib4uiv(index, b.value);
      } else {
        throw new Error('The length of an unsigned integer constant value must be 4!');
      }
    } else {
      gl.bindBuffer(ARRAY_BUFFER$1, b.buffer);
      gl.enableVertexAttribArray(index);
      gl.vertexAttribIPointer(index, b.numComponents || b.size, b.type || UNSIGNED_INT$3, b.stride || 0, b.offset || 0);

      if (b.divisor !== undefined) {
        gl.vertexAttribDivisor(index, b.divisor);
      }
    }
  };
}

function matAttribSetter(gl, index, typeInfo) {
  const defaultSize = typeInfo.size;
  const count = typeInfo.count;
  return function (b) {
    gl.bindBuffer(ARRAY_BUFFER$1, b.buffer);
    const numComponents = b.size || b.numComponents || defaultSize;
    const size = numComponents / count;
    const type = b.type || FLOAT$3;
    const typeInfo = typeMap[type];
    const stride = typeInfo.size * numComponents;
    const normalize = b.normalize || false;
    const offset = b.offset || 0;
    const rowOffset = stride / count;

    for (let i = 0; i < count; ++i) {
      gl.enableVertexAttribArray(index + i);
      gl.vertexAttribPointer(index + i, size, type, normalize, stride, offset + rowOffset * i);

      if (b.divisor !== undefined) {
        gl.vertexAttribDivisor(index + i, b.divisor);
      }
    }
  };
}

const attrTypeMap = {};
attrTypeMap[FLOAT$3] = {
  size: 4,
  setter: floatAttribSetter
};
attrTypeMap[FLOAT_VEC2] = {
  size: 8,
  setter: floatAttribSetter
};
attrTypeMap[FLOAT_VEC3] = {
  size: 12,
  setter: floatAttribSetter
};
attrTypeMap[FLOAT_VEC4] = {
  size: 16,
  setter: floatAttribSetter
};
attrTypeMap[INT$3] = {
  size: 4,
  setter: intAttribSetter
};
attrTypeMap[INT_VEC2] = {
  size: 8,
  setter: intAttribSetter
};
attrTypeMap[INT_VEC3] = {
  size: 12,
  setter: intAttribSetter
};
attrTypeMap[INT_VEC4] = {
  size: 16,
  setter: intAttribSetter
};
attrTypeMap[UNSIGNED_INT$3] = {
  size: 4,
  setter: uintAttribSetter
};
attrTypeMap[UNSIGNED_INT_VEC2] = {
  size: 8,
  setter: uintAttribSetter
};
attrTypeMap[UNSIGNED_INT_VEC3] = {
  size: 12,
  setter: uintAttribSetter
};
attrTypeMap[UNSIGNED_INT_VEC4] = {
  size: 16,
  setter: uintAttribSetter
};
attrTypeMap[BOOL] = {
  size: 4,
  setter: intAttribSetter
};
attrTypeMap[BOOL_VEC2] = {
  size: 8,
  setter: intAttribSetter
};
attrTypeMap[BOOL_VEC3] = {
  size: 12,
  setter: intAttribSetter
};
attrTypeMap[BOOL_VEC4] = {
  size: 16,
  setter: intAttribSetter
};
attrTypeMap[FLOAT_MAT2] = {
  size: 4,
  setter: matAttribSetter,
  count: 2
};
attrTypeMap[FLOAT_MAT3] = {
  size: 9,
  setter: matAttribSetter,
  count: 3
};
attrTypeMap[FLOAT_MAT4] = {
  size: 16,
  setter: matAttribSetter,
  count: 4
};
const errorRE = /ERROR:\s*\d+:(\d+)/gi;

function addLineNumbersWithError(src, log = '', lineOffset = 0) {
  // Note: Error message formats are not defined by any spec so this may or may not work.
  const matches = [...log.matchAll(errorRE)];
  const lineNoToErrorMap = new Map(matches.map((m, ndx) => {
    const lineNo = parseInt(m[1]);
    const next = matches[ndx + 1];
    const end = next ? next.index : log.length;
    const msg = log.substring(m.index, end);
    return [lineNo - 1, msg];
  }));
  return src.split('\n').map((line, lineNo) => {
    const err = lineNoToErrorMap.get(lineNo);
    return `${lineNo + 1 + lineOffset}: ${line}${err ? `\n\n^^^ ${err}` : ''}`;
  }).join('\n');
}
/**
 * Error Callback
 * @callback ErrorCallback
 * @param {string} msg error message.
 * @param {number} [lineOffset] amount to add to line number
 * @memberOf module:twgl
 */


const spaceRE = /^[ \t]*\n/;
/**
 * Loads a shader.
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext to use.
 * @param {string} shaderSource The shader source.
 * @param {number} shaderType The type of shader.
 * @param {module:twgl.ErrorCallback} opt_errorCallback callback for errors.
 * @return {WebGLShader} The created shader.
 * @private
 */

function loadShader(gl, shaderSource, shaderType, opt_errorCallback) {
  const errFn = opt_errorCallback || error$1; // Create the shader object

  const shader = gl.createShader(shaderType); // Remove the first end of line because WebGL 2.0 requires
  // #version 300 es
  // as the first line. No whitespace allowed before that line
  // so
  //
  // <script>
  // #version 300 es
  // </script>
  //
  // Has one line before it which is invalid according to GLSL ES 3.00
  //

  let lineOffset = 0;

  if (spaceRE.test(shaderSource)) {
    lineOffset = 1;
    shaderSource = shaderSource.replace(spaceRE, '');
  } // Load the shader source


  gl.shaderSource(shader, shaderSource); // Compile the shader

  gl.compileShader(shader); // Check the compile status

  const compiled = gl.getShaderParameter(shader, COMPILE_STATUS);

  if (!compiled) {
    // Something went wrong during compilation; get the error
    const lastError = gl.getShaderInfoLog(shader);
    errFn(`${addLineNumbersWithError(shaderSource, lastError, lineOffset)}\nError compiling ${glEnumToString(gl, shaderType)}: ${lastError}`);
    gl.deleteShader(shader);
    return null;
  }

  return shader;
}
/**
 * @typedef {Object} ProgramOptions
 * @property {function(string)} [errorCallback] callback for errors
 * @property {Object.<string,number>} [attribLocations] a attribute name to location map
 * @property {(module:twgl.BufferInfo|Object.<string,module:twgl.AttribInfo>|string[])} [transformFeedbackVaryings] If passed
 *   a BufferInfo will use the attribs names inside. If passed an object of AttribInfos will use the names from that object. Otherwise
 *   you can pass an array of names.
 * @property {number} [transformFeedbackMode] the mode to pass `gl.transformFeedbackVaryings`. Defaults to `SEPARATE_ATTRIBS`.
 * @memberOf module:twgl
 */

/**
 * Gets the program options based on all these optional arguments
 * @param {module:twgl.ProgramOptions|string[]} [opt_attribs] Options for the program or an array of attribs names. Locations will be assigned by index if not passed in
 * @param {number[]} [opt_locations] The locations for the. A parallel array to opt_attribs letting you assign locations.
 * @param {module:twgl.ErrorCallback} [opt_errorCallback] callback for errors. By default it just prints an error to the console
 *        on error. If you want something else pass an callback. It's passed an error message.
 * @return {module:twgl.ProgramOptions} an instance of ProgramOptions based on the arguments passed in
 * @private
 */


function getProgramOptions(opt_attribs, opt_locations, opt_errorCallback) {
  let transformFeedbackVaryings;
  let transformFeedbackMode;

  if (typeof opt_locations === 'function') {
    opt_errorCallback = opt_locations;
    opt_locations = undefined;
  }

  if (typeof opt_attribs === 'function') {
    opt_errorCallback = opt_attribs;
    opt_attribs = undefined;
  } else if (opt_attribs && !Array.isArray(opt_attribs)) {
    // If we have an errorCallback we can just return this object
    // Otherwise we need to construct one with default errorCallback
    if (opt_attribs.errorCallback) {
      return opt_attribs;
    }

    const opt = opt_attribs;
    opt_errorCallback = opt.errorCallback;
    opt_attribs = opt.attribLocations;
    transformFeedbackVaryings = opt.transformFeedbackVaryings;
    transformFeedbackMode = opt.transformFeedbackMode;
  }

  const options = {
    errorCallback: opt_errorCallback || error$1,
    transformFeedbackVaryings: transformFeedbackVaryings,
    transformFeedbackMode: transformFeedbackMode
  };

  if (opt_attribs) {
    let attribLocations = {};

    if (Array.isArray(opt_attribs)) {
      opt_attribs.forEach(function (attrib, ndx) {
        attribLocations[attrib] = opt_locations ? opt_locations[ndx] : ndx;
      });
    } else {
      attribLocations = opt_attribs;
    }

    options.attribLocations = attribLocations;
  }

  return options;
}

const defaultShaderType = ["VERTEX_SHADER", "FRAGMENT_SHADER"];

function getShaderTypeFromScriptType(gl, scriptType) {
  if (scriptType.indexOf("frag") >= 0) {
    return FRAGMENT_SHADER;
  } else if (scriptType.indexOf("vert") >= 0) {
    return VERTEX_SHADER;
  }

  return undefined;
}

function deleteShaders(gl, shaders) {
  shaders.forEach(function (shader) {
    gl.deleteShader(shader);
  });
}
/**
 * Creates a program, attaches (and/or compiles) shaders, binds attrib locations, links the
 * program and calls useProgram.
 *
 * NOTE: There are 4 signatures for this function
 *
 *     twgl.createProgram(gl, [vs, fs], options);
 *     twgl.createProgram(gl, [vs, fs], opt_errFunc);
 *     twgl.createProgram(gl, [vs, fs], opt_attribs, opt_errFunc);
 *     twgl.createProgram(gl, [vs, fs], opt_attribs, opt_locations, opt_errFunc);
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext to use.
 * @param {WebGLShader[]|string[]} shaders The shaders to attach, or element ids for their source, or strings that contain their source
 * @param {module:twgl.ProgramOptions|string[]|module:twgl.ErrorCallback} [opt_attribs] Options for the program or an array of attribs names or an error callback. Locations will be assigned by index if not passed in
 * @param {number[]} [opt_locations|module:twgl.ErrorCallback] The locations for the. A parallel array to opt_attribs letting you assign locations or an error callback.
 * @param {module:twgl.ErrorCallback} [opt_errorCallback] callback for errors. By default it just prints an error to the console
 *        on error. If you want something else pass an callback. It's passed an error message.
 * @return {WebGLProgram?} the created program or null if error.
 * @memberOf module:twgl/programs
 */


function createProgram(gl, shaders, opt_attribs, opt_locations, opt_errorCallback) {
  const progOptions = getProgramOptions(opt_attribs, opt_locations, opt_errorCallback);
  const realShaders = [];
  const newShaders = [];

  for (let ndx = 0; ndx < shaders.length; ++ndx) {
    let shader = shaders[ndx];

    if (typeof shader === 'string') {
      const elem = getElementById(shader);
      const src = elem ? elem.text : shader;
      let type = gl[defaultShaderType[ndx]];

      if (elem && elem.type) {
        type = getShaderTypeFromScriptType(gl, elem.type) || type;
      }

      shader = loadShader(gl, src, type, progOptions.errorCallback);
      newShaders.push(shader);
    }

    if (isShader(gl, shader)) {
      realShaders.push(shader);
    }
  }

  if (realShaders.length !== shaders.length) {
    progOptions.errorCallback("not enough shaders for program");
    deleteShaders(gl, newShaders);
    return null;
  }

  const program = gl.createProgram();
  realShaders.forEach(function (shader) {
    gl.attachShader(program, shader);
  });

  if (progOptions.attribLocations) {
    Object.keys(progOptions.attribLocations).forEach(function (attrib) {
      gl.bindAttribLocation(program, progOptions.attribLocations[attrib], attrib);
    });
  }

  let varyings = progOptions.transformFeedbackVaryings;

  if (varyings) {
    if (varyings.attribs) {
      varyings = varyings.attribs;
    }

    if (!Array.isArray(varyings)) {
      varyings = Object.keys(varyings);
    }

    gl.transformFeedbackVaryings(program, varyings, progOptions.transformFeedbackMode || SEPARATE_ATTRIBS);
  }

  gl.linkProgram(program); // Check the link status

  const linked = gl.getProgramParameter(program, LINK_STATUS);

  if (!linked) {
    // something went wrong with the link
    const lastError = gl.getProgramInfoLog(program);
    progOptions.errorCallback(`${realShaders.map(shader => {
      const src = addLineNumbersWithError(gl.getShaderSource(shader), '', 0);
      const type = gl.getShaderParameter(shader, gl.SHADER_TYPE);
      return `${glEnumToString(gl, type)}\n${src}}`;
    }).join('\n')}\nError in program linking: ${lastError}`);
    gl.deleteProgram(program);
    deleteShaders(gl, newShaders);
    return null;
  }

  return program;
}
/**
 * Loads a shader from a script tag.
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext to use.
 * @param {string} scriptId The id of the script tag.
 * @param {number} [opt_shaderType] The type of shader. If not passed in it will
 *     be derived from the type of the script tag.
 * @param {module:twgl.ErrorCallback} [opt_errorCallback] callback for errors.
 * @return {WebGLShader?} The created shader or null if error.
 * @private
 */


function createShaderFromScript(gl, scriptId, opt_shaderType, opt_errorCallback) {
  let shaderSource = "";
  const shaderScript = getElementById(scriptId);

  if (!shaderScript) {
    throw new Error(`unknown script element: ${scriptId}`);
  }

  shaderSource = shaderScript.text;
  const shaderType = opt_shaderType || getShaderTypeFromScriptType(gl, shaderScript.type);

  if (!shaderType) {
    throw new Error('unknown shader type');
  }

  return loadShader(gl, shaderSource, shaderType, opt_errorCallback);
}
/**
 * Creates a program from 2 script tags.
 *
 * NOTE: There are 4 signatures for this function
 *
 *     twgl.createProgramFromScripts(gl, [vs, fs], opt_options);
 *     twgl.createProgramFromScripts(gl, [vs, fs], opt_errFunc);
 *     twgl.createProgramFromScripts(gl, [vs, fs], opt_attribs, opt_errFunc);
 *     twgl.createProgramFromScripts(gl, [vs, fs], opt_attribs, opt_locations, opt_errFunc);
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext
 *        to use.
 * @param {string[]} shaderScriptIds Array of ids of the script
 *        tags for the shaders. The first is assumed to be the
 *        vertex shader, the second the fragment shader.
 * @param {module:twgl.ProgramOptions|string[]|module:twgl.ErrorCallback} [opt_attribs] Options for the program or an array of attribs names or an error callback. Locations will be assigned by index if not passed in
 * @param {number[]} [opt_locations|module:twgl.ErrorCallback] The locations for the. A parallel array to opt_attribs letting you assign locations or an error callback.
 * @param {module:twgl.ErrorCallback} [opt_errorCallback] callback for errors. By default it just prints an error to the console
 *        on error. If you want something else pass an callback. It's passed an error message.
 * @return {WebGLProgram?} the created program or null if error.
 * @memberOf module:twgl/programs
 */


function createProgramFromScripts(gl, shaderScriptIds, opt_attribs, opt_locations, opt_errorCallback) {
  const progOptions = getProgramOptions(opt_attribs, opt_locations, opt_errorCallback);
  const shaders = [];

  for (let ii = 0; ii < shaderScriptIds.length; ++ii) {
    const shader = createShaderFromScript(gl, shaderScriptIds[ii], gl[defaultShaderType[ii]], progOptions.errorCallback);

    if (!shader) {
      return null;
    }

    shaders.push(shader);
  }

  return createProgram(gl, shaders, progOptions);
}
/**
 * Creates a program from 2 sources.
 *
 * NOTE: There are 4 signatures for this function
 *
 *     twgl.createProgramFromSource(gl, [vs, fs], opt_options);
 *     twgl.createProgramFromSource(gl, [vs, fs], opt_errFunc);
 *     twgl.createProgramFromSource(gl, [vs, fs], opt_attribs, opt_errFunc);
 *     twgl.createProgramFromSource(gl, [vs, fs], opt_attribs, opt_locations, opt_errFunc);
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext
 *        to use.
 * @param {string[]} shaderSources Array of sources for the
 *        shaders. The first is assumed to be the vertex shader,
 *        the second the fragment shader.
 * @param {module:twgl.ProgramOptions|string[]|module:twgl.ErrorCallback} [opt_attribs] Options for the program or an array of attribs names or an error callback. Locations will be assigned by index if not passed in
 * @param {number[]} [opt_locations|module:twgl.ErrorCallback] The locations for the. A parallel array to opt_attribs letting you assign locations or an error callback.
 * @param {module:twgl.ErrorCallback} [opt_errorCallback] callback for errors. By default it just prints an error to the console
 *        on error. If you want something else pass an callback. It's passed an error message.
 * @return {WebGLProgram?} the created program or null if error.
 * @memberOf module:twgl/programs
 */


function createProgramFromSources(gl, shaderSources, opt_attribs, opt_locations, opt_errorCallback) {
  const progOptions = getProgramOptions(opt_attribs, opt_locations, opt_errorCallback);
  const shaders = [];

  for (let ii = 0; ii < shaderSources.length; ++ii) {
    const shader = loadShader(gl, shaderSources[ii], gl[defaultShaderType[ii]], progOptions.errorCallback);

    if (!shader) {
      return null;
    }

    shaders.push(shader);
  }

  return createProgram(gl, shaders, progOptions);
}
/**
 * Returns true if attribute/uniform is a reserved/built in
 *
 * It makes no sense to me why GL returns these because it's
 * illegal to call `gl.getUniformLocation` and `gl.getAttribLocation`
 * with names that start with `gl_` (and `webgl_` in WebGL)
 *
 * I can only assume they are there because they might count
 * when computing the number of uniforms/attributes used when you want to
 * know if you are near the limit. That doesn't really make sense
 * to me but the fact that these get returned are in the spec.
 *
 * @param {WebGLActiveInfo} info As returned from `gl.getActiveUniform` or
 *    `gl.getActiveAttrib`.
 * @return {bool} true if it's reserved
 * @private
 */


function isBuiltIn(info) {
  const name = info.name;
  return name.startsWith("gl_") || name.startsWith("webgl_");
}
/**
 * Creates setter functions for all uniforms of a shader
 * program.
 *
 * @see {@link module:twgl.setUniforms}
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext to use.
 * @param {WebGLProgram} program the program to create setters for.
 * @returns {Object.<string, function>} an object with a setter by name for each uniform
 * @memberOf module:twgl/programs
 */


function createUniformSetters(gl, program) {
  let textureUnit = 0;
  /**
   * Creates a setter for a uniform of the given program with it's
   * location embedded in the setter.
   * @param {WebGLProgram} program
   * @param {WebGLUniformInfo} uniformInfo
   * @returns {function} the created setter.
   */

  function createUniformSetter(program, uniformInfo, location) {
    const isArray = uniformInfo.name.endsWith("[0]");
    const type = uniformInfo.type;
    const typeInfo = typeMap[type];

    if (!typeInfo) {
      throw new Error(`unknown type: 0x${type.toString(16)}`); // we should never get here.
    }

    let setter;

    if (typeInfo.bindPoint) {
      // it's a sampler
      const unit = textureUnit;
      textureUnit += uniformInfo.size;

      if (isArray) {
        setter = typeInfo.arraySetter(gl, type, unit, location, uniformInfo.size);
      } else {
        setter = typeInfo.setter(gl, type, unit, location, uniformInfo.size);
      }
    } else {
      if (typeInfo.arraySetter && isArray) {
        setter = typeInfo.arraySetter(gl, location);
      } else {
        setter = typeInfo.setter(gl, location);
      }
    }

    setter.location = location;
    return setter;
  }

  const uniformSetters = {};
  const numUniforms = gl.getProgramParameter(program, ACTIVE_UNIFORMS);

  for (let ii = 0; ii < numUniforms; ++ii) {
    const uniformInfo = gl.getActiveUniform(program, ii);

    if (isBuiltIn(uniformInfo)) {
      continue;
    }

    let name = uniformInfo.name; // remove the array suffix.

    if (name.endsWith("[0]")) {
      name = name.substr(0, name.length - 3);
    }

    const location = gl.getUniformLocation(program, uniformInfo.name); // the uniform will have no location if it's in a uniform block

    if (location) {
      uniformSetters[name] = createUniformSetter(program, uniformInfo, location);
    }
  }

  return uniformSetters;
}
/**
 * @typedef {Object} TransformFeedbackInfo
 * @property {number} index index of transform feedback
 * @property {number} type GL type
 * @property {number} size 1 - 4
 * @memberOf module:twgl
 */

/**
 * Create TransformFeedbackInfo for passing to bindTransformFeedbackInfo.
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext to use.
 * @param {WebGLProgram} program an existing WebGLProgram.
 * @return {Object<string, module:twgl.TransformFeedbackInfo>}
 * @memberOf module:twgl
 */


function createTransformFeedbackInfo(gl, program) {
  const info = {};
  const numVaryings = gl.getProgramParameter(program, TRANSFORM_FEEDBACK_VARYINGS);

  for (let ii = 0; ii < numVaryings; ++ii) {
    const varying = gl.getTransformFeedbackVarying(program, ii);
    info[varying.name] = {
      index: ii,
      type: varying.type,
      size: varying.size
    };
  }

  return info;
}
/**
 * Binds buffers for transform feedback.
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext to use.
 * @param {(module:twgl.ProgramInfo|Object<string, module:twgl.TransformFeedbackInfo>)} transformFeedbackInfo A ProgramInfo or TransformFeedbackInfo.
 * @param {(module:twgl.BufferInfo|Object<string, module:twgl.AttribInfo>)} [bufferInfo] A BufferInfo or set of AttribInfos.
 * @memberOf module:twgl
 */


function bindTransformFeedbackInfo(gl, transformFeedbackInfo, bufferInfo) {
  if (transformFeedbackInfo.transformFeedbackInfo) {
    transformFeedbackInfo = transformFeedbackInfo.transformFeedbackInfo;
  }

  if (bufferInfo.attribs) {
    bufferInfo = bufferInfo.attribs;
  }

  for (const name in bufferInfo) {
    const varying = transformFeedbackInfo[name];

    if (varying) {
      const buf = bufferInfo[name];

      if (buf.offset) {
        gl.bindBufferRange(TRANSFORM_FEEDBACK_BUFFER, varying.index, buf.buffer, buf.offset, buf.size);
      } else {
        gl.bindBufferBase(TRANSFORM_FEEDBACK_BUFFER, varying.index, buf.buffer);
      }
    }
  }
}
/**
 * Creates a transform feedback and sets the buffers
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext to use.
 * @param {module:twgl.ProgramInfo} programInfo A ProgramInfo as returned from {@link module:twgl.createProgramInfo}
 * @param {(module:twgl.BufferInfo|Object<string, module:twgl.AttribInfo>)} [bufferInfo] A BufferInfo or set of AttribInfos.
 * @return {WebGLTransformFeedback} the created transform feedback
 * @memberOf module:twgl
 */


function createTransformFeedback(gl, programInfo, bufferInfo) {
  const tf = gl.createTransformFeedback();
  gl.bindTransformFeedback(TRANSFORM_FEEDBACK, tf);
  gl.useProgram(programInfo.program);
  bindTransformFeedbackInfo(gl, programInfo, bufferInfo);
  gl.bindTransformFeedback(TRANSFORM_FEEDBACK, null);
  return tf;
}
/**
 * @typedef {Object} UniformData
 * @property {number} type The WebGL type enum for this uniform
 * @property {number} size The number of elements for this uniform
 * @property {number} blockNdx The block index this uniform appears in
 * @property {number} offset The byte offset in the block for this uniform's value
 * @memberOf module:twgl
 */

/**
 * The specification for one UniformBlockObject
 *
 * @typedef {Object} BlockSpec
 * @property {number} index The index of the block.
 * @property {number} size The size in bytes needed for the block
 * @property {number[]} uniformIndices The indices of the uniforms used by the block. These indices
 *    correspond to entries in a UniformData array in the {@link module:twgl.UniformBlockSpec}.
 * @property {bool} usedByVertexShader Self explanatory
 * @property {bool} usedByFragmentShader Self explanatory
 * @property {bool} used Self explanatory
 * @memberOf module:twgl
 */

/**
 * A `UniformBlockSpec` represents the data needed to create and bind
 * UniformBlockObjects for a given program
 *
 * @typedef {Object} UniformBlockSpec
 * @property {Object.<string, module:twgl.BlockSpec> blockSpecs The BlockSpec for each block by block name
 * @property {UniformData[]} uniformData An array of data for each uniform by uniform index.
 * @memberOf module:twgl
 */

/**
 * Creates a UniformBlockSpec for the given program.
 *
 * A UniformBlockSpec represents the data needed to create and bind
 * UniformBlockObjects
 *
 * @param {WebGL2RenderingContext} gl A WebGL2 Rendering Context
 * @param {WebGLProgram} program A WebGLProgram for a successfully linked program
 * @return {module:twgl.UniformBlockSpec} The created UniformBlockSpec
 * @memberOf module:twgl/programs
 */


function createUniformBlockSpecFromProgram(gl, program) {
  const numUniforms = gl.getProgramParameter(program, ACTIVE_UNIFORMS);
  const uniformData = [];
  const uniformIndices = [];

  for (let ii = 0; ii < numUniforms; ++ii) {
    uniformIndices.push(ii);
    uniformData.push({});
    const uniformInfo = gl.getActiveUniform(program, ii);

    if (isBuiltIn(uniformInfo)) {
      break;
    }

    uniformData[ii].name = uniformInfo.name;
  }

  [["UNIFORM_TYPE", "type"], ["UNIFORM_SIZE", "size"], // num elements
  ["UNIFORM_BLOCK_INDEX", "blockNdx"], ["UNIFORM_OFFSET", "offset"]].forEach(function (pair) {
    const pname = pair[0];
    const key = pair[1];
    gl.getActiveUniforms(program, uniformIndices, gl[pname]).forEach(function (value, ndx) {
      uniformData[ndx][key] = value;
    });
  });
  const blockSpecs = {};
  const numUniformBlocks = gl.getProgramParameter(program, ACTIVE_UNIFORM_BLOCKS);

  for (let ii = 0; ii < numUniformBlocks; ++ii) {
    const name = gl.getActiveUniformBlockName(program, ii);
    const blockSpec = {
      index: gl.getUniformBlockIndex(program, name),
      usedByVertexShader: gl.getActiveUniformBlockParameter(program, ii, UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER),
      usedByFragmentShader: gl.getActiveUniformBlockParameter(program, ii, UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER),
      size: gl.getActiveUniformBlockParameter(program, ii, UNIFORM_BLOCK_DATA_SIZE),
      uniformIndices: gl.getActiveUniformBlockParameter(program, ii, UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES)
    };
    blockSpec.used = blockSpec.usedByVertexShader || blockSpec.usedByFragmentShader;
    blockSpecs[name] = blockSpec;
  }

  return {
    blockSpecs: blockSpecs,
    uniformData: uniformData
  };
}

const arraySuffixRE = /\[\d+\]\.$/; // better way to check?

const pad = (v, padding) => ((v + (padding - 1)) / padding | 0) * padding;

function createUniformBlockUniformSetter(view, Type, typeSize, paddedSize, isArray) {
  if (isArray) {
    const numElements = typeSize / Type.BYTES_PER_ELEMENT;
    const numPaddedElements = paddedSize / Type.BYTES_PER_ELEMENT;
    return function (value) {
      let dst = 0;

      for (let src = 0; src < value.length; src += numElements) {
        for (let i = 0; i < numElements; ++i) {
          view[dst + i] = value[src + i];
        }

        dst += numPaddedElements;
      }
    };
  } else {
    return function (value) {
      if (value.length) {
        view.set(value);
      } else {
        view[0] = value;
      }
    };
  }
}
/**
 * Represents a UniformBlockObject including an ArrayBuffer with all the uniform values
 * and a corresponding WebGLBuffer to hold those values on the GPU
 *
 * @typedef {Object} UniformBlockInfo
 * @property {string} name The name of the block
 * @property {ArrayBuffer} array The array buffer that contains the uniform values
 * @property {Float32Array} asFloat A float view on the array buffer. This is useful
 *    inspecting the contents of the buffer in the debugger.
 * @property {WebGLBuffer} buffer A WebGL buffer that will hold a copy of the uniform values for rendering.
 * @property {number} [offset] offset into buffer
 * @property {Object<string, ArrayBufferView>} uniforms A uniform name to ArrayBufferView map.
 *   each Uniform has a correctly typed `ArrayBufferView` into array at the correct offset
 *   and length of that uniform. So for example a float uniform would have a 1 float `Float32Array`
 *   view. A single mat4 would have a 16 element `Float32Array` view. An ivec2 would have an
 *   `Int32Array` view, etc.
 * @property {Object<string, function>} setters A setter for this uniform.
 *   The reason to use setters is elements of arrays are padded to vec4 sizes which
 *   means if you want to set an array of 4 floats you'd need to set 16 values
 *   (or set elements 0, 4, 8, 12). In other words
 *   `someBlockInfo.uniforms.some4FloatArrayUniform.set([0, , , , 1, , , , 2, , , , 3])`
 *   where as the setter handles just passing in [0, 1, 2, 3] either directly as in
 *   `someBlockInfo.setter.some4FloatArrayUniform.set([0, 1, 2, 3])` (not recommended)
 *   or via {@link module:twgl.setBlockUniforms}
 * @memberOf module:twgl
 */

/**
 * Creates a `UniformBlockInfo` for the specified block
 *
 * Note: **If the blockName matches no existing blocks a warning is printed to the console and a dummy
 * `UniformBlockInfo` is returned**. This is because when debugging GLSL
 * it is common to comment out large portions of a shader or for example set
 * the final output to a constant. When that happens blocks get optimized out.
 * If this function did not create dummy blocks your code would crash when debugging.
 *
 * @param {WebGL2RenderingContext} gl A WebGL2RenderingContext
 * @param {WebGLProgram} program A WebGLProgram
 * @param {module:twgl.UniformBlockSpec} uniformBlockSpec. A UniformBlockSpec as returned
 *     from {@link module:twgl.createUniformBlockSpecFromProgram}.
 * @param {string} blockName The name of the block.
 * @return {module:twgl.UniformBlockInfo} The created UniformBlockInfo
 * @memberOf module:twgl/programs
 */


function createUniformBlockInfoFromProgram(gl, program, uniformBlockSpec, blockName) {
  const blockSpecs = uniformBlockSpec.blockSpecs;
  const uniformData = uniformBlockSpec.uniformData;
  const blockSpec = blockSpecs[blockName];

  if (!blockSpec) {
    warn$1("no uniform block object named:", blockName);
    return {
      name: blockName,
      uniforms: {}
    };
  }

  const array = new ArrayBuffer(blockSpec.size);
  const buffer = gl.createBuffer();
  const uniformBufferIndex = blockSpec.index;
  gl.bindBuffer(UNIFORM_BUFFER, buffer);
  gl.uniformBlockBinding(program, blockSpec.index, uniformBufferIndex);
  let prefix = blockName + ".";

  if (arraySuffixRE.test(prefix)) {
    prefix = prefix.replace(arraySuffixRE, ".");
  }

  const uniforms = {};
  const setters = {};
  blockSpec.uniformIndices.forEach(function (uniformNdx) {
    const data = uniformData[uniformNdx];
    const typeInfo = typeMap[data.type];
    const Type = typeInfo.Type;
    const paddedSize = pad(typeInfo.size, 16);
    const length = typeInfo.size + (data.size - 1) * paddedSize;
    let name = data.name;

    if (name.startsWith(prefix)) {
      name = name.substr(prefix.length);
    }

    const isArray = name.endsWith('[0]');

    if (isArray) {
      name = name.substr(0, name.length - 3);
    }

    const uniformView = new Type(array, data.offset, length / Type.BYTES_PER_ELEMENT);
    uniforms[name] = uniformView;
    setters[name] = createUniformBlockUniformSetter(uniformView, Type, typeInfo.size, paddedSize, isArray);
  });
  return {
    name: blockName,
    array,
    asFloat: new Float32Array(array),
    // for debugging
    buffer,
    uniforms,
    setters
  };
}
/**
 * Creates a `UniformBlockInfo` for the specified block
 *
 * Note: **If the blockName matches no existing blocks a warning is printed to the console and a dummy
 * `UniformBlockInfo` is returned**. This is because when debugging GLSL
 * it is common to comment out large portions of a shader or for example set
 * the final output to a constant. When that happens blocks get optimized out.
 * If this function did not create dummy blocks your code would crash when debugging.
 *
 * @param {WebGL2RenderingContext} gl A WebGL2RenderingContext
 * @param {module:twgl.ProgramInfo} programInfo a `ProgramInfo`
 *     as returned from {@link module:twgl.createProgramInfo}
 * @param {string} blockName The name of the block.
 * @return {module:twgl.UniformBlockInfo} The created UniformBlockInfo
 * @memberOf module:twgl/programs
 */


function createUniformBlockInfo(gl, programInfo, blockName) {
  return createUniformBlockInfoFromProgram(gl, programInfo.program, programInfo.uniformBlockSpec, blockName);
}
/**
 * Binds a uniform block to the matching uniform block point.
 * Matches by blocks by name so blocks must have the same name not just the same
 * structure.
 *
 * If you have changed any values and you upload the values into the corresponding WebGLBuffer
 * call {@link module:twgl.setUniformBlock} instead.
 *
 * @param {WebGL2RenderingContext} gl A WebGL 2 rendering context.
 * @param {(module:twgl.ProgramInfo|module:twgl.UniformBlockSpec)} programInfo a `ProgramInfo`
 *     as returned from {@link module:twgl.createProgramInfo} or or `UniformBlockSpec` as
 *     returned from {@link module:twgl.createUniformBlockSpecFromProgram}.
 * @param {module:twgl.UniformBlockInfo} uniformBlockInfo a `UniformBlockInfo` as returned from
 *     {@link module:twgl.createUniformBlockInfo}.
 * @return {bool} true if buffer was bound. If the programInfo has no block with the same block name
 *     no buffer is bound.
 * @memberOf module:twgl/programs
 */


function bindUniformBlock(gl, programInfo, uniformBlockInfo) {
  const uniformBlockSpec = programInfo.uniformBlockSpec || programInfo;
  const blockSpec = uniformBlockSpec.blockSpecs[uniformBlockInfo.name];

  if (blockSpec) {
    const bufferBindIndex = blockSpec.index;
    gl.bindBufferRange(UNIFORM_BUFFER, bufferBindIndex, uniformBlockInfo.buffer, uniformBlockInfo.offset || 0, uniformBlockInfo.array.byteLength);
    return true;
  }

  return false;
}
/**
 * Uploads the current uniform values to the corresponding WebGLBuffer
 * and binds that buffer to the program's corresponding bind point for the uniform block object.
 *
 * If you haven't changed any values and you only need to bind the uniform block object
 * call {@link module:twgl.bindUniformBlock} instead.
 *
 * @param {WebGL2RenderingContext} gl A WebGL 2 rendering context.
 * @param {(module:twgl.ProgramInfo|module:twgl.UniformBlockSpec)} programInfo a `ProgramInfo`
 *     as returned from {@link module:twgl.createProgramInfo} or or `UniformBlockSpec` as
 *     returned from {@link module:twgl.createUniformBlockSpecFromProgram}.
 * @param {module:twgl.UniformBlockInfo} uniformBlockInfo a `UniformBlockInfo` as returned from
 *     {@link module:twgl.createUniformBlockInfo}.
 * @memberOf module:twgl/programs
 */


function setUniformBlock(gl, programInfo, uniformBlockInfo) {
  if (bindUniformBlock(gl, programInfo, uniformBlockInfo)) {
    gl.bufferData(UNIFORM_BUFFER, uniformBlockInfo.array, DYNAMIC_DRAW);
  }
}
/**
 * Sets values of a uniform block object
 *
 * @param {module:twgl.UniformBlockInfo} uniformBlockInfo A UniformBlockInfo as returned by {@link module:twgl.createUniformBlockInfo}.
 * @param {Object.<string, ?>} values A uniform name to value map where the value is correct for the given
 *    type of uniform. So for example given a block like
 *
 *       uniform SomeBlock {
 *         float someFloat;
 *         vec2 someVec2;
 *         vec3 someVec3Array[2];
 *         int someInt;
 *       }
 *
 *  You can set the values of the uniform block with
 *
 *       twgl.setBlockUniforms(someBlockInfo, {
 *          someFloat: 12.3,
 *          someVec2: [1, 2],
 *          someVec3Array: [1, 2, 3, 4, 5, 6],
 *          someInt: 5,
 *       }
 *
 *  Arrays can be JavaScript arrays or typed arrays
 *
 *  Any name that doesn't match will be ignored
 * @memberOf module:twgl/programs
 */


function setBlockUniforms(uniformBlockInfo, values) {
  const setters = uniformBlockInfo.setters;

  for (const name in values) {
    const setter = setters[name];

    if (setter) {
      const value = values[name];
      setter(value);
    }
  }
}
/**
 * Set uniforms and binds related textures.
 *
 * example:
 *
 *     const programInfo = createProgramInfo(
 *         gl, ["some-vs", "some-fs"]);
 *
 *     const tex1 = gl.createTexture();
 *     const tex2 = gl.createTexture();
 *
 *     ... assume we setup the textures with data ...
 *
 *     const uniforms = {
 *       u_someSampler: tex1,
 *       u_someOtherSampler: tex2,
 *       u_someColor: [1,0,0,1],
 *       u_somePosition: [0,1,1],
 *       u_someMatrix: [
 *         1,0,0,0,
 *         0,1,0,0,
 *         0,0,1,0,
 *         0,0,0,0,
 *       ],
 *     };
 *
 *     gl.useProgram(program);
 *
 * This will automatically bind the textures AND set the
 * uniforms.
 *
 *     twgl.setUniforms(programInfo, uniforms);
 *
 * For the example above it is equivalent to
 *
 *     var texUnit = 0;
 *     gl.activeTexture(gl.TEXTURE0 + texUnit);
 *     gl.bindTexture(gl.TEXTURE_2D, tex1);
 *     gl.uniform1i(u_someSamplerLocation, texUnit++);
 *     gl.activeTexture(gl.TEXTURE0 + texUnit);
 *     gl.bindTexture(gl.TEXTURE_2D, tex2);
 *     gl.uniform1i(u_someSamplerLocation, texUnit++);
 *     gl.uniform4fv(u_someColorLocation, [1, 0, 0, 1]);
 *     gl.uniform3fv(u_somePositionLocation, [0, 1, 1]);
 *     gl.uniformMatrix4fv(u_someMatrix, false, [
 *         1,0,0,0,
 *         0,1,0,0,
 *         0,0,1,0,
 *         0,0,0,0,
 *       ]);
 *
 * Note it is perfectly reasonable to call `setUniforms` multiple times. For example
 *
 *     const uniforms = {
 *       u_someSampler: tex1,
 *       u_someOtherSampler: tex2,
 *     };
 *
 *     const moreUniforms {
 *       u_someColor: [1,0,0,1],
 *       u_somePosition: [0,1,1],
 *       u_someMatrix: [
 *         1,0,0,0,
 *         0,1,0,0,
 *         0,0,1,0,
 *         0,0,0,0,
 *       ],
 *     };
 *
 *     twgl.setUniforms(programInfo, uniforms);
 *     twgl.setUniforms(programInfo, moreUniforms);
 *
 * You can also add WebGLSamplers to uniform samplers as in
 *
 *     const uniforms = {
 *       u_someSampler: {
 *         texture: someWebGLTexture,
 *         sampler: someWebGLSampler,
 *       },
 *     };
 *
 * In which case both the sampler and texture will be bound to the
 * same unit.
 *
 * @param {(module:twgl.ProgramInfo|Object.<string, function>)} setters a `ProgramInfo` as returned from `createProgramInfo` or the setters returned from
 *        `createUniformSetters`.
 * @param {Object.<string, ?>} values an object with values for the
 *        uniforms.
 *   You can pass multiple objects by putting them in an array or by calling with more arguments.For example
 *
 *     const sharedUniforms = {
 *       u_fogNear: 10,
 *       u_projection: ...
 *       ...
 *     };
 *
 *     const localUniforms = {
 *       u_world: ...
 *       u_diffuseColor: ...
 *     };
 *
 *     twgl.setUniforms(programInfo, sharedUniforms, localUniforms);
 *
 *     // is the same as
 *
 *     twgl.setUniforms(programInfo, [sharedUniforms, localUniforms]);
 *
 *     // is the same as
 *
 *     twgl.setUniforms(programInfo, sharedUniforms);
 *     twgl.setUniforms(programInfo, localUniforms};
 *
 * @memberOf module:twgl/programs
 */


function setUniforms(setters, values) {
  // eslint-disable-line
  const actualSetters = setters.uniformSetters || setters;
  const numArgs = arguments.length;

  for (let aNdx = 1; aNdx < numArgs; ++aNdx) {
    const values = arguments[aNdx];

    if (Array.isArray(values)) {
      const numValues = values.length;

      for (let ii = 0; ii < numValues; ++ii) {
        setUniforms(actualSetters, values[ii]);
      }
    } else {
      for (const name in values) {
        const setter = actualSetters[name];

        if (setter) {
          setter(values[name]);
        }
      }
    }
  }
}
/**
 * Alias for `setUniforms`
 * @function
 * @param {(module:twgl.ProgramInfo|Object.<string, function>)} setters a `ProgramInfo` as returned from `createProgramInfo` or the setters returned from
 *        `createUniformSetters`.
 * @param {Object.<string, ?>} values an object with values for the
 * @memberOf module:twgl/programs
 */


const setUniformsAndBindTextures = setUniforms;
/**
 * Creates setter functions for all attributes of a shader
 * program. You can pass this to {@link module:twgl.setBuffersAndAttributes} to set all your buffers and attributes.
 *
 * @see {@link module:twgl.setAttributes} for example
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext to use.
 * @param {WebGLProgram} program the program to create setters for.
 * @return {Object.<string, function>} an object with a setter for each attribute by name.
 * @memberOf module:twgl/programs
 */

exports.setUniformsAndBindTextures = setUniformsAndBindTextures;

function createAttributeSetters(gl, program) {
  const attribSetters = {};
  const numAttribs = gl.getProgramParameter(program, ACTIVE_ATTRIBUTES);

  for (let ii = 0; ii < numAttribs; ++ii) {
    const attribInfo = gl.getActiveAttrib(program, ii);

    if (isBuiltIn(attribInfo)) {
      continue;
    }

    const index = gl.getAttribLocation(program, attribInfo.name);
    const typeInfo = attrTypeMap[attribInfo.type];
    const setter = typeInfo.setter(gl, index, typeInfo);
    setter.location = index;
    attribSetters[attribInfo.name] = setter;
  }

  return attribSetters;
}
/**
 * Sets attributes and binds buffers (deprecated... use {@link module:twgl.setBuffersAndAttributes})
 *
 * Example:
 *
 *     const program = createProgramFromScripts(
 *         gl, ["some-vs", "some-fs");
 *
 *     const attribSetters = createAttributeSetters(program);
 *
 *     const positionBuffer = gl.createBuffer();
 *     const texcoordBuffer = gl.createBuffer();
 *
 *     const attribs = {
 *       a_position: {buffer: positionBuffer, numComponents: 3},
 *       a_texcoord: {buffer: texcoordBuffer, numComponents: 2},
 *     };
 *
 *     gl.useProgram(program);
 *
 * This will automatically bind the buffers AND set the
 * attributes.
 *
 *     setAttributes(attribSetters, attribs);
 *
 * Properties of attribs. For each attrib you can add
 * properties:
 *
 * *   type: the type of data in the buffer. Default = gl.FLOAT
 * *   normalize: whether or not to normalize the data. Default = false
 * *   stride: the stride. Default = 0
 * *   offset: offset into the buffer. Default = 0
 * *   divisor: the divisor for instances. Default = undefined
 *
 * For example if you had 3 value float positions, 2 value
 * float texcoord and 4 value uint8 colors you'd setup your
 * attribs like this
 *
 *     const attribs = {
 *       a_position: {buffer: positionBuffer, numComponents: 3},
 *       a_texcoord: {buffer: texcoordBuffer, numComponents: 2},
 *       a_color: {
 *         buffer: colorBuffer,
 *         numComponents: 4,
 *         type: gl.UNSIGNED_BYTE,
 *         normalize: true,
 *       },
 *     };
 *
 * @param {Object.<string, function>} setters Attribute setters as returned from createAttributeSetters
 * @param {Object.<string, module:twgl.AttribInfo>} buffers AttribInfos mapped by attribute name.
 * @memberOf module:twgl/programs
 * @deprecated use {@link module:twgl.setBuffersAndAttributes}
 */


function setAttributes(setters, buffers) {
  for (const name in buffers) {
    const setter = setters[name];

    if (setter) {
      setter(buffers[name]);
    }
  }
}
/**
 * Sets attributes and buffers including the `ELEMENT_ARRAY_BUFFER` if appropriate
 *
 * Example:
 *
 *     const programInfo = createProgramInfo(
 *         gl, ["some-vs", "some-fs");
 *
 *     const arrays = {
 *       position: { numComponents: 3, data: [0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0], },
 *       texcoord: { numComponents: 2, data: [0, 0, 0, 1, 1, 0, 1, 1],                 },
 *     };
 *
 *     const bufferInfo = createBufferInfoFromArrays(gl, arrays);
 *
 *     gl.useProgram(programInfo.program);
 *
 * This will automatically bind the buffers AND set the
 * attributes.
 *
 *     setBuffersAndAttributes(gl, programInfo, bufferInfo);
 *
 * For the example above it is equivalent to
 *
 *     gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
 *     gl.enableVertexAttribArray(a_positionLocation);
 *     gl.vertexAttribPointer(a_positionLocation, 3, gl.FLOAT, false, 0, 0);
 *     gl.bindBuffer(gl.ARRAY_BUFFER, texcoordBuffer);
 *     gl.enableVertexAttribArray(a_texcoordLocation);
 *     gl.vertexAttribPointer(a_texcoordLocation, 4, gl.FLOAT, false, 0, 0);
 *
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext.
 * @param {(module:twgl.ProgramInfo|Object.<string, function>)} setters A `ProgramInfo` as returned from {@link module:twgl.createProgramInfo} or Attribute setters as returned from {@link module:twgl.createAttributeSetters}
 * @param {(module:twgl.BufferInfo|module:twgl.VertexArrayInfo)} buffers a `BufferInfo` as returned from {@link module:twgl.createBufferInfoFromArrays}.
 *   or a `VertexArrayInfo` as returned from {@link module:twgl.createVertexArrayInfo}
 * @memberOf module:twgl/programs
 */


function setBuffersAndAttributes(gl, programInfo, buffers) {
  if (buffers.vertexArrayObject) {
    gl.bindVertexArray(buffers.vertexArrayObject);
  } else {
    setAttributes(programInfo.attribSetters || programInfo, buffers.attribs);

    if (buffers.indices) {
      gl.bindBuffer(ELEMENT_ARRAY_BUFFER$1, buffers.indices);
    }
  }
}
/**
 * @typedef {Object} ProgramInfo
 * @property {WebGLProgram} program A shader program
 * @property {Object<string, function>} uniformSetters object of setters as returned from createUniformSetters,
 * @property {Object<string, function>} attribSetters object of setters as returned from createAttribSetters,
 * @property {module:twgl.UniformBlockSpec} [uniformBlockSpace] a uniform block spec for making UniformBlockInfos with createUniformBlockInfo etc..
 * @property {Object<string, module:twgl.TransformFeedbackInfo>} [transformFeedbackInfo] info for transform feedbacks
 * @memberOf module:twgl
 */

/**
 * Creates a ProgramInfo from an existing program.
 *
 * A ProgramInfo contains
 *
 *     programInfo = {
 *        program: WebGLProgram,
 *        uniformSetters: object of setters as returned from createUniformSetters,
 *        attribSetters: object of setters as returned from createAttribSetters,
 *     }
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext
 *        to use.
 * @param {WebGLProgram} program an existing WebGLProgram.
 * @return {module:twgl.ProgramInfo} The created ProgramInfo.
 * @memberOf module:twgl/programs
 */


function createProgramInfoFromProgram(gl, program) {
  const uniformSetters = createUniformSetters(gl, program);
  const attribSetters = createAttributeSetters(gl, program);
  const programInfo = {
    program: program,
    uniformSetters: uniformSetters,
    attribSetters: attribSetters
  };

  if (isWebGL2(gl)) {
    programInfo.uniformBlockSpec = createUniformBlockSpecFromProgram(gl, program);
    programInfo.transformFeedbackInfo = createTransformFeedbackInfo(gl, program);
  }

  return programInfo;
}
/**
 * Creates a ProgramInfo from 2 sources.
 *
 * A ProgramInfo contains
 *
 *     programInfo = {
 *        program: WebGLProgram,
 *        uniformSetters: object of setters as returned from createUniformSetters,
 *        attribSetters: object of setters as returned from createAttribSetters,
 *     }
 *
 * NOTE: There are 4 signatures for this function
 *
 *     twgl.createProgramInfo(gl, [vs, fs], options);
 *     twgl.createProgramInfo(gl, [vs, fs], opt_errFunc);
 *     twgl.createProgramInfo(gl, [vs, fs], opt_attribs, opt_errFunc);
 *     twgl.createProgramInfo(gl, [vs, fs], opt_attribs, opt_locations, opt_errFunc);
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext
 *        to use.
 * @param {string[]} shaderSources Array of sources for the
 *        shaders or ids. The first is assumed to be the vertex shader,
 *        the second the fragment shader.
 * @param {module:twgl.ProgramOptions|string[]|module:twgl.ErrorCallback} [opt_attribs] Options for the program or an array of attribs names or an error callback. Locations will be assigned by index if not passed in
 * @param {number[]} [opt_locations|module:twgl.ErrorCallback] The locations for the. A parallel array to opt_attribs letting you assign locations or an error callback.
 * @param {module:twgl.ErrorCallback} [opt_errorCallback] callback for errors. By default it just prints an error to the console
 *        on error. If you want something else pass an callback. It's passed an error message.
 * @return {module:twgl.ProgramInfo?} The created ProgramInfo or null if it failed to link or compile
 * @memberOf module:twgl/programs
 */


function createProgramInfo(gl, shaderSources, opt_attribs, opt_locations, opt_errorCallback) {
  const progOptions = getProgramOptions(opt_attribs, opt_locations, opt_errorCallback);
  let good = true;
  shaderSources = shaderSources.map(function (source) {
    // Lets assume if there is no \n it's an id
    if (source.indexOf("\n") < 0) {
      const script = getElementById(source);

      if (!script) {
        progOptions.errorCallback("no element with id: " + source);
        good = false;
      } else {
        source = script.text;
      }
    }

    return source;
  });

  if (!good) {
    return null;
  }

  const program = createProgramFromSources(gl, shaderSources, progOptions);

  if (!program) {
    return null;
  }

  return createProgramInfoFromProgram(gl, program);
}

var programs = /*#__PURE__*/Object.freeze({
  __proto__: null,
  createAttributeSetters: createAttributeSetters,
  createProgram: createProgram,
  createProgramFromScripts: createProgramFromScripts,
  createProgramFromSources: createProgramFromSources,
  createProgramInfo: createProgramInfo,
  createProgramInfoFromProgram: createProgramInfoFromProgram,
  createUniformSetters: createUniformSetters,
  createUniformBlockSpecFromProgram: createUniformBlockSpecFromProgram,
  createUniformBlockInfoFromProgram: createUniformBlockInfoFromProgram,
  createUniformBlockInfo: createUniformBlockInfo,
  createTransformFeedback: createTransformFeedback,
  createTransformFeedbackInfo: createTransformFeedbackInfo,
  bindTransformFeedbackInfo: bindTransformFeedbackInfo,
  setAttributes: setAttributes,
  setBuffersAndAttributes: setBuffersAndAttributes,
  setUniforms: setUniforms,
  setUniformsAndBindTextures: setUniformsAndBindTextures,
  setUniformBlock: setUniformBlock,
  setBlockUniforms: setBlockUniforms,
  bindUniformBlock: bindUniformBlock
});
/*
 * Copyright 2019 Gregg Tavares
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

exports.programs = programs;
const TRIANGLES = 0x0004;
const UNSIGNED_SHORT$3 = 0x1403;
/**
 * Drawing related functions
 *
 * For backward compatibility they are available at both `twgl.draw` and `twgl`
 * itself
 *
 * See {@link module:twgl} for core functions
 *
 * @module twgl/draw
 */

/**
 * Calls `gl.drawElements` or `gl.drawArrays`, whichever is appropriate
 *
 * normally you'd call `gl.drawElements` or `gl.drawArrays` yourself
 * but calling this means if you switch from indexed data to non-indexed
 * data you don't have to remember to update your draw call.
 *
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext
 * @param {(module:twgl.BufferInfo|module:twgl.VertexArrayInfo)} bufferInfo A BufferInfo as returned from {@link module:twgl.createBufferInfoFromArrays} or
 *   a VertexArrayInfo as returned from {@link module:twgl.createVertexArrayInfo}
 * @param {number} [type] eg (gl.TRIANGLES, gl.LINES, gl.POINTS, gl.TRIANGLE_STRIP, ...). Defaults to `gl.TRIANGLES`
 * @param {number} [count] An optional count. Defaults to bufferInfo.numElements
 * @param {number} [offset] An optional offset. Defaults to 0.
 * @param {number} [instanceCount] An optional instanceCount. if set then `drawArraysInstanced` or `drawElementsInstanced` will be called
 * @memberOf module:twgl/draw
 */

function drawBufferInfo(gl, bufferInfo, type, count, offset, instanceCount) {
  type = type === undefined ? TRIANGLES : type;
  const indices = bufferInfo.indices;
  const elementType = bufferInfo.elementType;
  const numElements = count === undefined ? bufferInfo.numElements : count;
  offset = offset === undefined ? 0 : offset;

  if (elementType || indices) {
    if (instanceCount !== undefined) {
      gl.drawElementsInstanced(type, numElements, elementType === undefined ? UNSIGNED_SHORT$3 : bufferInfo.elementType, offset, instanceCount);
    } else {
      gl.drawElements(type, numElements, elementType === undefined ? UNSIGNED_SHORT$3 : bufferInfo.elementType, offset);
    }
  } else {
    if (instanceCount !== undefined) {
      gl.drawArraysInstanced(type, offset, numElements, instanceCount);
    } else {
      gl.drawArrays(type, offset, numElements);
    }
  }
}
/**
 * A DrawObject is useful for putting objects in to an array and passing them to {@link module:twgl.drawObjectList}.
 *
 * You need either a `BufferInfo` or a `VertexArrayInfo`.
 *
 * @typedef {Object} DrawObject
 * @property {boolean} [active] whether or not to draw. Default = `true` (must be `false` to be not true). In other words `undefined` = `true`
 * @property {number} [type] type to draw eg. `gl.TRIANGLES`, `gl.LINES`, etc...
 * @property {module:twgl.ProgramInfo} programInfo A ProgramInfo as returned from {@link module:twgl.createProgramInfo}
 * @property {module:twgl.BufferInfo} [bufferInfo] A BufferInfo as returned from {@link module:twgl.createBufferInfoFromArrays}
 * @property {module:twgl.VertexArrayInfo} [vertexArrayInfo] A VertexArrayInfo as returned from {@link module:twgl.createVertexArrayInfo}
 * @property {Object<string, ?>} uniforms The values for the uniforms.
 *   You can pass multiple objects by putting them in an array. For example
 *
 *     var sharedUniforms = {
 *       u_fogNear: 10,
 *       u_projection: ...
 *       ...
 *     };
 *
 *     var localUniforms = {
 *       u_world: ...
 *       u_diffuseColor: ...
 *     };
 *
 *     var drawObj = {
 *       ...
 *       uniforms: [sharedUniforms, localUniforms],
 *     };
 *
 * @property {number} [offset] the offset to pass to `gl.drawArrays` or `gl.drawElements`. Defaults to 0.
 * @property {number} [count] the count to pass to `gl.drawArrays` or `gl.drawElements`. Defaults to bufferInfo.numElements.
 * @property {number} [instanceCount] the number of instances. Defaults to undefined.
 * @memberOf module:twgl
 */

/**
 * Draws a list of objects
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext
 * @param {DrawObject[]} objectsToDraw an array of objects to draw.
 * @memberOf module:twgl/draw
 */


function drawObjectList(gl, objectsToDraw) {
  let lastUsedProgramInfo = null;
  let lastUsedBufferInfo = null;
  objectsToDraw.forEach(function (object) {
    if (object.active === false) {
      return;
    }

    const programInfo = object.programInfo;
    const bufferInfo = object.vertexArrayInfo || object.bufferInfo;
    let bindBuffers = false;
    const type = object.type === undefined ? TRIANGLES : object.type;

    if (programInfo !== lastUsedProgramInfo) {
      lastUsedProgramInfo = programInfo;
      gl.useProgram(programInfo.program); // We have to rebind buffers when changing programs because we
      // only bind buffers the program uses. So if 2 programs use the same
      // bufferInfo but the 1st one uses only positions the when the
      // we switch to the 2nd one some of the attributes will not be on.

      bindBuffers = true;
    } // Setup all the needed attributes.


    if (bindBuffers || bufferInfo !== lastUsedBufferInfo) {
      if (lastUsedBufferInfo && lastUsedBufferInfo.vertexArrayObject && !bufferInfo.vertexArrayObject) {
        gl.bindVertexArray(null);
      }

      lastUsedBufferInfo = bufferInfo;
      setBuffersAndAttributes(gl, programInfo, bufferInfo);
    } // Set the uniforms.


    setUniforms(programInfo, object.uniforms); // Draw

    drawBufferInfo(gl, bufferInfo, type, object.count, object.offset, object.instanceCount);
  });

  if (lastUsedBufferInfo && lastUsedBufferInfo.vertexArrayObject) {
    gl.bindVertexArray(null);
  }
}

var draw = /*#__PURE__*/Object.freeze({
  __proto__: null,
  drawBufferInfo: drawBufferInfo,
  drawObjectList: drawObjectList
});
/*
 * Copyright 2019 Gregg Tavares
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

exports.draw = draw;
const FRAMEBUFFER = 0x8d40;
const RENDERBUFFER = 0x8d41;
const TEXTURE_2D$2 = 0x0de1;
const UNSIGNED_BYTE$3 = 0x1401;
/* PixelFormat */

const DEPTH_COMPONENT$1 = 0x1902;
const RGBA$1 = 0x1908;
const DEPTH_COMPONENT24$1 = 0x81a6;
const DEPTH_COMPONENT32F$1 = 0x8cac;
const DEPTH24_STENCIL8$1 = 0x88f0;
const DEPTH32F_STENCIL8$1 = 0x8cad;
/* Framebuffer Object. */

const RGBA4$1 = 0x8056;
const RGB5_A1$1 = 0x8057;
const RGB565$1 = 0x8D62;
const DEPTH_COMPONENT16$1 = 0x81A5;
const STENCIL_INDEX = 0x1901;
const STENCIL_INDEX8 = 0x8D48;
const DEPTH_STENCIL$1 = 0x84F9;
const COLOR_ATTACHMENT0 = 0x8CE0;
const DEPTH_ATTACHMENT = 0x8D00;
const STENCIL_ATTACHMENT = 0x8D20;
const DEPTH_STENCIL_ATTACHMENT = 0x821A;
/* TextureWrapMode */

const CLAMP_TO_EDGE$1 = 0x812F;
/* TextureMagFilter */

const LINEAR$1 = 0x2601;
/**
 * The options for a framebuffer attachment.
 *
 * Note: For a `format` that is a texture include all the texture
 * options from {@link module:twgl.TextureOptions} for example
 * `min`, `mag`, `clamp`, etc... Note that unlike {@link module:twgl.TextureOptions}
 * `auto` defaults to `false` for attachment textures but `min` and `mag` default
 * to `gl.LINEAR` and `wrap` defaults to `CLAMP_TO_EDGE`
 *
 * @typedef {Object} AttachmentOptions
 * @property {number} [attachmentPoint] The attachment point. Defaults
 *   to `gl.COLOR_ATTACHMENT0 + ndx` unless type is a depth or stencil type
 *   then it's gl.DEPTH_ATTACHMENT or `gl.DEPTH_STENCIL_ATTACHMENT` depending
 *   on the format or attachment type.
 * @property {number} [format] The format. If one of `gl.RGBA4`,
 *   `gl.RGB565`, `gl.RGB5_A1`, `gl.DEPTH_COMPONENT16`,
 *   `gl.STENCIL_INDEX8` or `gl.DEPTH_STENCIL` then will create a
 *   renderbuffer. Otherwise will create a texture. Default = `gl.RGBA`
 * @property {number} [type] The type. Used for texture. Default = `gl.UNSIGNED_BYTE`.
 * @property {number} [target] The texture target for `gl.framebufferTexture2D`.
 *   Defaults to `gl.TEXTURE_2D`. Set to appropriate face for cube maps.
 * @property {number} [level] level for `gl.framebufferTexture2D`. Defaults to 0.
 * @property {number} [layer] layer for `gl.framebufferTextureLayer`. Defaults to undefined.
 *   If set then `gl.framebufferTextureLayer` is called, if not then `gl.framebufferTexture2D`
 * @property {WebGLObject} [attachment] An existing renderbuffer or texture.
 *    If provided will attach this Object. This allows you to share
 *    attachments across framebuffers.
 * @memberOf module:twgl
 * @mixes module:twgl.TextureOptions
 */

const defaultAttachments = [{
  format: RGBA$1,
  type: UNSIGNED_BYTE$3,
  min: LINEAR$1,
  wrap: CLAMP_TO_EDGE$1
}, {
  format: DEPTH_STENCIL$1
}];
const attachmentsByFormat = {};
attachmentsByFormat[DEPTH_STENCIL$1] = DEPTH_STENCIL_ATTACHMENT;
attachmentsByFormat[STENCIL_INDEX] = STENCIL_ATTACHMENT;
attachmentsByFormat[STENCIL_INDEX8] = STENCIL_ATTACHMENT;
attachmentsByFormat[DEPTH_COMPONENT$1] = DEPTH_ATTACHMENT;
attachmentsByFormat[DEPTH_COMPONENT16$1] = DEPTH_ATTACHMENT;
attachmentsByFormat[DEPTH_COMPONENT24$1] = DEPTH_ATTACHMENT;
attachmentsByFormat[DEPTH_COMPONENT32F$1] = DEPTH_ATTACHMENT;
attachmentsByFormat[DEPTH24_STENCIL8$1] = DEPTH_STENCIL_ATTACHMENT;
attachmentsByFormat[DEPTH32F_STENCIL8$1] = DEPTH_STENCIL_ATTACHMENT;

function getAttachmentPointForFormat(format, internalFormat) {
  return attachmentsByFormat[format] || attachmentsByFormat[internalFormat];
}

const renderbufferFormats = {};
renderbufferFormats[RGBA4$1] = true;
renderbufferFormats[RGB5_A1$1] = true;
renderbufferFormats[RGB565$1] = true;
renderbufferFormats[DEPTH_STENCIL$1] = true;
renderbufferFormats[DEPTH_COMPONENT16$1] = true;
renderbufferFormats[STENCIL_INDEX] = true;
renderbufferFormats[STENCIL_INDEX8] = true;

function isRenderbufferFormat(format) {
  return renderbufferFormats[format];
}
/**
 * @typedef {Object} FramebufferInfo
 * @property {WebGLFramebuffer} framebuffer The WebGLFramebuffer for this framebufferInfo
 * @property {WebGLObject[]} attachments The created attachments in the same order as passed in to {@link module:twgl.createFramebufferInfo}.
 * @property {number} width The width of the framebuffer and its attachments
 * @property {number} height The width of the framebuffer and its attachments
 * @memberOf module:twgl
 */

/**
 * Creates a framebuffer and attachments.
 *
 * This returns a {@link module:twgl.FramebufferInfo} because it needs to return the attachments as well as the framebuffer.
 *
 * The simplest usage
 *
 *     // create an RGBA/UNSIGNED_BYTE texture and DEPTH_STENCIL renderbuffer
 *     const fbi = twgl.createFramebufferInfo(gl);
 *
 * More complex usage
 *
 *     // create an RGB565 renderbuffer and a STENCIL_INDEX8 renderbuffer
 *     const attachments = [
 *       { format: RGB565, mag: NEAREST },
 *       { format: STENCIL_INDEX8 },
 *     ]
 *     const fbi = twgl.createFramebufferInfo(gl, attachments);
 *
 * Passing in a specific size
 *
 *     const width = 256;
 *     const height = 256;
 *     const fbi = twgl.createFramebufferInfo(gl, attachments, width, height);
 *
 * **Note!!** It is up to you to check if the framebuffer is renderable by calling `gl.checkFramebufferStatus`.
 * [WebGL1 only guarantees 3 combinations of attachments work](https://www.khronos.org/registry/webgl/specs/latest/1.0/#6.6).
 *
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {module:twgl.AttachmentOptions[]} [attachments] which attachments to create. If not provided the default is a framebuffer with an
 *    `RGBA`, `UNSIGNED_BYTE` texture `COLOR_ATTACHMENT0` and a `DEPTH_STENCIL` renderbuffer `DEPTH_STENCIL_ATTACHMENT`.
 * @param {number} [width] the width for the attachments. Default = size of drawingBuffer
 * @param {number} [height] the height for the attachments. Default = size of drawingBuffer
 * @return {module:twgl.FramebufferInfo} the framebuffer and attachments.
 * @memberOf module:twgl/framebuffers
 */


function createFramebufferInfo(gl, attachments, width, height) {
  const target = FRAMEBUFFER;
  const fb = gl.createFramebuffer();
  gl.bindFramebuffer(target, fb);
  width = width || gl.drawingBufferWidth;
  height = height || gl.drawingBufferHeight;
  attachments = attachments || defaultAttachments;
  let colorAttachmentCount = 0;
  const framebufferInfo = {
    framebuffer: fb,
    attachments: [],
    width: width,
    height: height
  };
  attachments.forEach(function (attachmentOptions) {
    let attachment = attachmentOptions.attachment;
    const format = attachmentOptions.format;
    let attachmentPoint = attachmentOptions.attachmentPoint || getAttachmentPointForFormat(format, attachmentOptions.internalFormat);

    if (!attachmentPoint) {
      attachmentPoint = COLOR_ATTACHMENT0 + colorAttachmentCount++;
    }

    if (!attachment) {
      if (isRenderbufferFormat(format)) {
        attachment = gl.createRenderbuffer();
        gl.bindRenderbuffer(RENDERBUFFER, attachment);
        gl.renderbufferStorage(RENDERBUFFER, format, width, height);
      } else {
        const textureOptions = Object.assign({}, attachmentOptions);
        textureOptions.width = width;
        textureOptions.height = height;

        if (textureOptions.auto === undefined) {
          textureOptions.auto = false;
          textureOptions.min = textureOptions.min || textureOptions.minMag || LINEAR$1;
          textureOptions.mag = textureOptions.mag || textureOptions.minMag || LINEAR$1;
          textureOptions.wrapS = textureOptions.wrapS || textureOptions.wrap || CLAMP_TO_EDGE$1;
          textureOptions.wrapT = textureOptions.wrapT || textureOptions.wrap || CLAMP_TO_EDGE$1;
        }

        attachment = createTexture(gl, textureOptions);
      }
    }

    if (isRenderbuffer(gl, attachment)) {
      gl.framebufferRenderbuffer(target, attachmentPoint, RENDERBUFFER, attachment);
    } else if (isTexture(gl, attachment)) {
      if (attachmentOptions.layer !== undefined) {
        gl.framebufferTextureLayer(target, attachmentPoint, attachment, attachmentOptions.level || 0, attachmentOptions.layer);
      } else {
        gl.framebufferTexture2D(target, attachmentPoint, attachmentOptions.target || TEXTURE_2D$2, attachment, attachmentOptions.level || 0);
      }
    } else {
      throw new Error('unknown attachment type');
    }

    framebufferInfo.attachments.push(attachment);
  });
  return framebufferInfo;
}
/**
 * Resizes the attachments of a framebuffer.
 *
 * You need to pass in the same `attachments` as you passed in {@link module:twgl.createFramebufferInfo}
 * because TWGL has no idea the format/type of each attachment.
 *
 * The simplest usage
 *
 *     // create an RGBA/UNSIGNED_BYTE texture and DEPTH_STENCIL renderbuffer
 *     const fbi = twgl.createFramebufferInfo(gl);
 *
 *     ...
 *
 *     function render() {
 *       if (twgl.resizeCanvasToDisplaySize(gl.canvas)) {
 *         // resize the attachments
 *         twgl.resizeFramebufferInfo(gl, fbi);
 *       }
 *
 * More complex usage
 *
 *     // create an RGB565 renderbuffer and a STENCIL_INDEX8 renderbuffer
 *     const attachments = [
 *       { format: RGB565, mag: NEAREST },
 *       { format: STENCIL_INDEX8 },
 *     ]
 *     const fbi = twgl.createFramebufferInfo(gl, attachments);
 *
 *     ...
 *
 *     function render() {
 *       if (twgl.resizeCanvasToDisplaySize(gl.canvas)) {
 *         // resize the attachments to match
 *         twgl.resizeFramebufferInfo(gl, fbi, attachments);
 *       }
 *
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {module:twgl.FramebufferInfo} framebufferInfo a framebufferInfo as returned from {@link module:twgl.createFramebufferInfo}.
 * @param {module:twgl.AttachmentOptions[]} [attachments] the same attachments options as passed to {@link module:twgl.createFramebufferInfo}.
 * @param {number} [width] the width for the attachments. Default = size of drawingBuffer
 * @param {number} [height] the height for the attachments. Default = size of drawingBuffer
 * @memberOf module:twgl/framebuffers
 */


function resizeFramebufferInfo(gl, framebufferInfo, attachments, width, height) {
  width = width || gl.drawingBufferWidth;
  height = height || gl.drawingBufferHeight;
  framebufferInfo.width = width;
  framebufferInfo.height = height;
  attachments = attachments || defaultAttachments;
  attachments.forEach(function (attachmentOptions, ndx) {
    const attachment = framebufferInfo.attachments[ndx];
    const format = attachmentOptions.format;

    if (isRenderbuffer(gl, attachment)) {
      gl.bindRenderbuffer(RENDERBUFFER, attachment);
      gl.renderbufferStorage(RENDERBUFFER, format, width, height);
    } else if (isTexture(gl, attachment)) {
      resizeTexture(gl, attachment, attachmentOptions, width, height);
    } else {
      throw new Error('unknown attachment type');
    }
  });
}
/**
 * Binds a framebuffer
 *
 * This function pretty much solely exists because I spent hours
 * trying to figure out why something I wrote wasn't working only
 * to realize I forget to set the viewport dimensions.
 * My hope is this function will fix that.
 *
 * It is effectively the same as
 *
 *     gl.bindFramebuffer(gl.FRAMEBUFFER, someFramebufferInfo.framebuffer);
 *     gl.viewport(0, 0, someFramebufferInfo.width, someFramebufferInfo.height);
 *
 * @param {WebGLRenderingContext} gl the WebGLRenderingContext
 * @param {module:twgl.FramebufferInfo|null} [framebufferInfo] a framebufferInfo as returned from {@link module:twgl.createFramebufferInfo}.
 *   If falsy will bind the canvas.
 * @param {number} [target] The target. If not passed `gl.FRAMEBUFFER` will be used.
 * @memberOf module:twgl/framebuffers
 */


function bindFramebufferInfo(gl, framebufferInfo, target) {
  target = target || FRAMEBUFFER;

  if (framebufferInfo) {
    gl.bindFramebuffer(target, framebufferInfo.framebuffer);
    gl.viewport(0, 0, framebufferInfo.width, framebufferInfo.height);
  } else {
    gl.bindFramebuffer(target, null);
    gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
  }
}

var framebuffers = /*#__PURE__*/Object.freeze({
  __proto__: null,
  bindFramebufferInfo: bindFramebufferInfo,
  createFramebufferInfo: createFramebufferInfo,
  resizeFramebufferInfo: resizeFramebufferInfo
});
/*
 * Copyright 2019 Gregg Tavares
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

/**
 * vertex array object related functions
 *
 * You should generally not need to use these functions. They are provided
 * for those cases where you're doing something out of the ordinary
 * and you need lower level access.
 *
 * For backward compatibility they are available at both `twgl.attributes` and `twgl`
 * itself
 *
 * See {@link module:twgl} for core functions
 *
 * @module twgl/vertexArrays
 */

exports.framebuffers = framebuffers;
const ELEMENT_ARRAY_BUFFER$2 = 0x8893;
/**
 * @typedef {Object} VertexArrayInfo
 * @property {number} numElements The number of elements to pass to `gl.drawArrays` or `gl.drawElements`.
 * @property {number} [elementType] The type of indices `UNSIGNED_BYTE`, `UNSIGNED_SHORT` etc..
 * @property {WebGLVertexArrayObject} [vertexArrayObject] a vertex array object
 * @memberOf module:twgl
 */

/**
 * Creates a VertexArrayInfo from a BufferInfo and one or more ProgramInfos
 *
 * This can be passed to {@link module:twgl.setBuffersAndAttributes} and to
 * {@link module:twgl:drawBufferInfo}.
 *
 * > **IMPORTANT:** Vertex Array Objects are **not** a direct analog for a BufferInfo. Vertex Array Objects
 *   assign buffers to specific attributes at creation time. That means they can only be used with programs
 *   who's attributes use the same attribute locations for the same purposes.
 *
 * > Bind your attribute locations by passing an array of attribute names to {@link module:twgl.createProgramInfo}
 *   or use WebGL 2's GLSL ES 3's `layout(location = <num>)` to make sure locations match.
 *
 * also
 *
 * > **IMPORTANT:** After calling twgl.setBuffersAndAttribute with a BufferInfo that uses a Vertex Array Object
 *   that Vertex Array Object will be bound. That means **ANY MANIPULATION OF ELEMENT_ARRAY_BUFFER or ATTRIBUTES**
 *   will affect the Vertex Array Object state.
 *
 * > Call `gl.bindVertexArray(null)` to get back manipulating the global attributes and ELEMENT_ARRAY_BUFFER.
 *
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext
 * @param {module:twgl.ProgramInfo|module:twgl.ProgramInfo[]} programInfo a programInfo or array of programInfos
 * @param {module:twgl.BufferInfo} bufferInfo BufferInfo as returned from createBufferInfoFromArrays etc...
 *
 *    You need to make sure every attribute that will be used is bound. So for example assume shader 1
 *    uses attributes A, B, C and shader 2 uses attributes A, B, D. If you only pass in the programInfo
 *    for shader 1 then only attributes A, B, and C will have their attributes set because TWGL doesn't
 *    now attribute D's location.
 *
 *    So, you can pass in both shader 1 and shader 2's programInfo
 *
 * @return {module:twgl.VertexArrayInfo} The created VertexArrayInfo
 *
 * @memberOf module:twgl/vertexArrays
 */

function createVertexArrayInfo(gl, programInfos, bufferInfo) {
  const vao = gl.createVertexArray();
  gl.bindVertexArray(vao);

  if (!programInfos.length) {
    programInfos = [programInfos];
  }

  programInfos.forEach(function (programInfo) {
    setBuffersAndAttributes(gl, programInfo, bufferInfo);
  });
  gl.bindVertexArray(null);
  return {
    numElements: bufferInfo.numElements,
    elementType: bufferInfo.elementType,
    vertexArrayObject: vao
  };
}
/**
 * Creates a vertex array object and then sets the attributes on it
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext to use.
 * @param {Object.<string, function>} setters Attribute setters as returned from createAttributeSetters
 * @param {Object.<string, module:twgl.AttribInfo>} attribs AttribInfos mapped by attribute name.
 * @param {WebGLBuffer} [indices] an optional ELEMENT_ARRAY_BUFFER of indices
 * @memberOf module:twgl/vertexArrays
 */


function createVAOAndSetAttributes(gl, setters, attribs, indices) {
  const vao = gl.createVertexArray();
  gl.bindVertexArray(vao);
  setAttributes(setters, attribs);

  if (indices) {
    gl.bindBuffer(ELEMENT_ARRAY_BUFFER$2, indices);
  } // We unbind this because otherwise any change to ELEMENT_ARRAY_BUFFER
  // like when creating buffers for other stuff will mess up this VAO's binding


  gl.bindVertexArray(null);
  return vao;
}
/**
 * Creates a vertex array object and then sets the attributes
 * on it
 *
 * @param {WebGLRenderingContext} gl The WebGLRenderingContext
 *        to use.
 * @param {Object.<string, function>| module:twgl.ProgramInfo} programInfo as returned from createProgramInfo or Attribute setters as returned from createAttributeSetters
 * @param {module:twgl.BufferInfo} bufferInfo BufferInfo as returned from createBufferInfoFromArrays etc...
 * @param {WebGLBuffer} [indices] an optional ELEMENT_ARRAY_BUFFER of indices
 * @memberOf module:twgl/vertexArrays
 */


function createVAOFromBufferInfo(gl, programInfo, bufferInfo) {
  return createVAOAndSetAttributes(gl, programInfo.attribSetters || programInfo, bufferInfo.attribs, bufferInfo.indices);
}

var vertexArrays = /*#__PURE__*/Object.freeze({
  __proto__: null,
  createVertexArrayInfo: createVertexArrayInfo,
  createVAOAndSetAttributes: createVAOAndSetAttributes,
  createVAOFromBufferInfo: createVAOFromBufferInfo
});
/*
 * Copyright 2019 Gregg Tavares
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

exports.vertexArrays = vertexArrays;
const defaults$2 = {
  addExtensionsToContext: true
};
/**
 * Various default settings for twgl.
 *
 * Note: You can call this any number of times. Example:
 *
 *     twgl.setDefaults({ textureColor: [1, 0, 0, 1] });
 *     twgl.setDefaults({ attribPrefix: 'a_' });
 *
 * is equivalent to
 *
 *     twgl.setDefaults({
 *       textureColor: [1, 0, 0, 1],
 *       attribPrefix: 'a_',
 *     });
 *
 * @typedef {Object} Defaults
 * @property {string} [attribPrefix] The prefix to stick on attributes
 *
 *   When writing shaders I prefer to name attributes with `a_`, uniforms with `u_` and varyings with `v_`
 *   as it makes it clear where they came from. But, when building geometry I prefer using un-prefixed names.
 *
 *   In other words I'll create arrays of geometry like this
 *
 *       const arrays = {
 *         position: ...
 *         normal: ...
 *         texcoord: ...
 *       };
 *
 *   But need those mapped to attributes and my attributes start with `a_`.
 *
 *   Default: `""`
 *
 * @property {number[]} [textureColor] Array of 4 values in the range 0 to 1
 *
 *   The default texture color is used when loading textures from
 *   urls. Because the URL will be loaded async we'd like to be
 *   able to use the texture immediately. By putting a 1x1 pixel
 *   color in the texture we can start using the texture before
 *   the URL has loaded.
 *
 *   Default: `[0.5, 0.75, 1, 1]`
 *
 * @property {string} [crossOrigin]
 *
 *   If not undefined sets the crossOrigin attribute on images
 *   that twgl creates when downloading images for textures.
 *
 *   Also see {@link module:twgl.TextureOptions}.
 *
 * @property {bool} [addExtensionsToContext]
 *
 *   If true, then, when twgl will try to add any supported WebGL extensions
 *   directly to the context under their normal GL names. For example
 *   if ANGLE_instances_arrays exists then twgl would enable it,
 *   add the functions `vertexAttribDivisor`, `drawArraysInstanced`,
 *   `drawElementsInstanced`, and the constant `VERTEX_ATTRIB_ARRAY_DIVISOR`
 *   to the `WebGLRenderingContext`.
 *
 * @memberOf module:twgl
 */

/**
 * Sets various defaults for twgl.
 *
 * In the interest of terseness which is kind of the point
 * of twgl I've integrated a few of the older functions here
 *
 * @param {module:twgl.Defaults} newDefaults The default settings.
 * @memberOf module:twgl
 */

function setDefaults$2(newDefaults) {
  copyExistingProperties(newDefaults, defaults$2);
  setDefaults(newDefaults); // eslint-disable-line

  setDefaults$1(newDefaults); // eslint-disable-line
}

const prefixRE = /^(.*?)_/;

function addExtensionToContext(gl, extensionName) {
  glEnumToString(gl, 0);
  const ext = gl.getExtension(extensionName);

  if (ext) {
    const enums = {};
    const fnSuffix = prefixRE.exec(extensionName)[1];
    const enumSuffix = '_' + fnSuffix;

    for (const key in ext) {
      const value = ext[key];
      const isFunc = typeof value === 'function';
      const suffix = isFunc ? fnSuffix : enumSuffix;
      let name = key; // examples of where this is not true are WEBGL_compressed_texture_s3tc
      // and WEBGL_compressed_texture_pvrtc

      if (key.endsWith(suffix)) {
        name = key.substring(0, key.length - suffix.length);
      }

      if (gl[name] !== undefined) {
        if (!isFunc && gl[name] !== value) {
          warn(name, gl[name], value, key);
        }
      } else {
        if (isFunc) {
          gl[name] = function (origFn) {
            return function () {
              return origFn.apply(ext, arguments);
            };
          }(value);
        } else {
          gl[name] = value;
          enums[name] = value;
        }
      }
    } // pass the modified enums to glEnumToString


    enums.constructor = {
      name: ext.constructor.name
    };
    glEnumToString(enums, 0);
  }

  return ext;
}
/*
 * If you're wondering why the code doesn't just iterate
 * over all extensions using `gl.getExtensions` is that it's possible
 * some future extension is incompatible with this code. Rather than
 * have thing suddenly break it seems better to manually add to this
 * list.
 *
 */


const supportedExtensions = ['ANGLE_instanced_arrays', 'EXT_blend_minmax', 'EXT_color_buffer_float', 'EXT_color_buffer_half_float', 'EXT_disjoint_timer_query', 'EXT_disjoint_timer_query_webgl2', 'EXT_frag_depth', 'EXT_sRGB', 'EXT_shader_texture_lod', 'EXT_texture_filter_anisotropic', 'OES_element_index_uint', 'OES_standard_derivatives', 'OES_texture_float', 'OES_texture_float_linear', 'OES_texture_half_float', 'OES_texture_half_float_linear', 'OES_vertex_array_object', 'WEBGL_color_buffer_float', 'WEBGL_compressed_texture_atc', 'WEBGL_compressed_texture_etc1', 'WEBGL_compressed_texture_pvrtc', 'WEBGL_compressed_texture_s3tc', 'WEBGL_compressed_texture_s3tc_srgb', 'WEBGL_depth_texture', 'WEBGL_draw_buffers'];
/**
 * Attempts to enable all of the following extensions
 * and add their functions and constants to the
 * `WebGLRenderingContext` using their normal non-extension like names.
 *
 *      ANGLE_instanced_arrays
 *      EXT_blend_minmax
 *      EXT_color_buffer_float
 *      EXT_color_buffer_half_float
 *      EXT_disjoint_timer_query
 *      EXT_disjoint_timer_query_webgl2
 *      EXT_frag_depth
 *      EXT_sRGB
 *      EXT_shader_texture_lod
 *      EXT_texture_filter_anisotropic
 *      OES_element_index_uint
 *      OES_standard_derivatives
 *      OES_texture_float
 *      OES_texture_float_linear
 *      OES_texture_half_float
 *      OES_texture_half_float_linear
 *      OES_vertex_array_object
 *      WEBGL_color_buffer_float
 *      WEBGL_compressed_texture_atc
 *      WEBGL_compressed_texture_etc1
 *      WEBGL_compressed_texture_pvrtc
 *      WEBGL_compressed_texture_s3tc
 *      WEBGL_compressed_texture_s3tc_srgb
 *      WEBGL_depth_texture
 *      WEBGL_draw_buffers
 *
 * For example if `ANGLE_instanced_arrays` exists then the functions
 * `drawArraysInstanced`, `drawElementsInstanced`, `vertexAttribDivisor`
 * and the constant `VERTEX_ATTRIB_ARRAY_DIVISOR` are added to the
 * `WebGLRenderingContext`.
 *
 * Note that if you want to know if the extension exists you should
 * probably call `gl.getExtension` for each extension. Alternatively
 * you can check for the existence of the functions or constants that
 * are expected to be added. For example
 *
 *    if (gl.drawBuffers) {
 *      // Either WEBGL_draw_buffers was enabled OR you're running in WebGL2
 *      ....
 *
 * @param {WebGLRenderingContext} gl A WebGLRenderingContext
 * @memberOf module:twgl
 */

function addExtensionsToContext(gl) {
  for (let ii = 0; ii < supportedExtensions.length; ++ii) {
    addExtensionToContext(gl, supportedExtensions[ii]);
  }
}
/**
 * Creates a webgl context.
 * @param {HTMLCanvasElement} canvas The canvas tag to get
 *     context from. If one is not passed in one will be
 *     created.
 * @return {WebGLRenderingContext} The created context.
 * @private
 */


function create3DContext(canvas, opt_attribs) {
  const names = ["webgl", "experimental-webgl"];
  let context = null;

  for (let ii = 0; ii < names.length; ++ii) {
    context = canvas.getContext(names[ii], opt_attribs);

    if (context) {
      if (defaults$2.addExtensionsToContext) {
        addExtensionsToContext(context);
      }

      break;
    }
  }

  return context;
}
/**
 * Gets a WebGL1 context.
 *
 * Note: Will attempt to enable Vertex Array Objects
 * and add WebGL2 entry points. (unless you first set defaults with
 * `twgl.setDefaults({enableVertexArrayObjects: false})`;
 *
 * @param {HTMLCanvasElement} canvas a canvas element.
 * @param {WebGLContextAttributes} [opt_attribs] optional webgl context creation attributes
 * @return {WebGLRenderingContext} The created context.
 * @memberOf module:twgl
 */


function getWebGLContext(canvas, opt_attribs) {
  const gl = create3DContext(canvas, opt_attribs);
  return gl;
}
/**
 * Creates a webgl context.
 *
 * Will return a WebGL2 context if possible.
 *
 * You can check if it's WebGL2 with
 *
 *     twgl.isWebGL2(gl);
 *
 * @param {HTMLCanvasElement} canvas The canvas tag to get
 *     context from. If one is not passed in one will be
 *     created.
 * @return {WebGLRenderingContext} The created context.
 */


function createContext(canvas, opt_attribs) {
  const names = ["webgl2", "webgl", "experimental-webgl"];
  let context = null;

  for (let ii = 0; ii < names.length; ++ii) {
    context = canvas.getContext(names[ii], opt_attribs);

    if (context) {
      if (defaults$2.addExtensionsToContext) {
        addExtensionsToContext(context);
      }

      break;
    }
  }

  return context;
}
/**
 * Gets a WebGL context.  Will create a WebGL2 context if possible.
 *
 * You can check if it's WebGL2 with
 *
 *    function isWebGL2(gl) {
 *      return gl.getParameter(gl.VERSION).indexOf("WebGL 2.0 ") == 0;
 *    }
 *
 * Note: For a WebGL1 context will attempt to enable Vertex Array Objects
 * and add WebGL2 entry points. (unless you first set defaults with
 * `twgl.setDefaults({enableVertexArrayObjects: false})`;
 *
 * @param {HTMLCanvasElement} canvas a canvas element.
 * @param {WebGLContextAttributes} [opt_attribs] optional webgl context creation attributes
 * @return {WebGLRenderingContext} The created context.
 * @memberOf module:twgl
 */


function getContext(canvas, opt_attribs) {
  const gl = createContext(canvas, opt_attribs);
  return gl;
}
/**
 * Resize a canvas to match the size it's displayed.
 * @param {HTMLCanvasElement} canvas The canvas to resize.
 * @param {number} [multiplier] So you can pass in `window.devicePixelRatio` or other scale value if you want to.
 * @return {boolean} true if the canvas was resized.
 * @memberOf module:twgl
 */


function resizeCanvasToDisplaySize(canvas, multiplier) {
  multiplier = multiplier || 1;
  multiplier = Math.max(0, multiplier);
  const width = canvas.clientWidth * multiplier | 0;
  const height = canvas.clientHeight * multiplier | 0;

  if (canvas.width !== width || canvas.height !== height) {
    canvas.width = width;
    canvas.height = height;
    return true;
  }

  return false;
}

},{}]},{},[1])(1)
});