pdfjs-dist/lib/core/colorspace.js

/**
 * @licstart The following is the entire license notice for the
 * JavaScript code in this page
 *
 * Copyright 2022 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @licend The above is the entire license notice for the
 * JavaScript code in this page
 */
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.ColorSpace = void 0;

var _util = require("../shared/util.js");

var _primitives = require("./primitives.js");

var _base_stream = require("./base_stream.js");

var _core_utils = require("./core_utils.js");

function resizeRgbImage(src, dest, w1, h1, w2, h2, alpha01) {
  const COMPONENTS = 3;
  alpha01 = alpha01 !== 1 ? 0 : alpha01;
  const xRatio = w1 / w2;
  const yRatio = h1 / h2;
  let newIndex = 0,
      oldIndex;
  const xScaled = new Uint16Array(w2);
  const w1Scanline = w1 * COMPONENTS;

  for (let i = 0; i < w2; i++) {
    xScaled[i] = Math.floor(i * xRatio) * COMPONENTS;
  }

  for (let i = 0; i < h2; i++) {
    const py = Math.floor(i * yRatio) * w1Scanline;

    for (let j = 0; j < w2; j++) {
      oldIndex = py + xScaled[j];
      dest[newIndex++] = src[oldIndex++];
      dest[newIndex++] = src[oldIndex++];
      dest[newIndex++] = src[oldIndex++];
      newIndex += alpha01;
    }
  }
}

class ColorSpace {
  constructor(name, numComps) {
    if (this.constructor === ColorSpace) {
      (0, _util.unreachable)("Cannot initialize ColorSpace.");
    }

    this.name = name;
    this.numComps = numComps;
  }

  getRgb(src, srcOffset) {
    const rgb = new Uint8ClampedArray(3);
    this.getRgbItem(src, srcOffset, rgb, 0);
    return rgb;
  }

  getRgbItem(src, srcOffset, dest, destOffset) {
    (0, _util.unreachable)("Should not call ColorSpace.getRgbItem");
  }

  getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
    (0, _util.unreachable)("Should not call ColorSpace.getRgbBuffer");
  }

  getOutputLength(inputLength, alpha01) {
    (0, _util.unreachable)("Should not call ColorSpace.getOutputLength");
  }

  isPassthrough(bits) {
    return false;
  }

  isDefaultDecode(decodeMap, bpc) {
    return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
  }

  fillRgb(dest, originalWidth, originalHeight, width, height, actualHeight, bpc, comps, alpha01) {
    const count = originalWidth * originalHeight;
    let rgbBuf = null;
    const numComponentColors = 1 << bpc;
    const needsResizing = originalHeight !== height || originalWidth !== width;

    if (this.isPassthrough(bpc)) {
      rgbBuf = comps;
    } else if (this.numComps === 1 && count > numComponentColors && this.name !== "DeviceGray" && this.name !== "DeviceRGB") {
      const allColors = bpc <= 8 ? new Uint8Array(numComponentColors) : new Uint16Array(numComponentColors);

      for (let i = 0; i < numComponentColors; i++) {
        allColors[i] = i;
      }

      const colorMap = new Uint8ClampedArray(numComponentColors * 3);
      this.getRgbBuffer(allColors, 0, numComponentColors, colorMap, 0, bpc, 0);

      if (!needsResizing) {
        let destPos = 0;

        for (let i = 0; i < count; ++i) {
          const key = comps[i] * 3;
          dest[destPos++] = colorMap[key];
          dest[destPos++] = colorMap[key + 1];
          dest[destPos++] = colorMap[key + 2];
          destPos += alpha01;
        }
      } else {
        rgbBuf = new Uint8Array(count * 3);
        let rgbPos = 0;

        for (let i = 0; i < count; ++i) {
          const key = comps[i] * 3;
          rgbBuf[rgbPos++] = colorMap[key];
          rgbBuf[rgbPos++] = colorMap[key + 1];
          rgbBuf[rgbPos++] = colorMap[key + 2];
        }
      }
    } else {
      if (!needsResizing) {
        this.getRgbBuffer(comps, 0, width * actualHeight, dest, 0, bpc, alpha01);
      } else {
        rgbBuf = new Uint8ClampedArray(count * 3);
        this.getRgbBuffer(comps, 0, count, rgbBuf, 0, bpc, 0);
      }
    }

    if (rgbBuf) {
      if (needsResizing) {
        resizeRgbImage(rgbBuf, dest, originalWidth, originalHeight, width, height, alpha01);
      } else {
        let destPos = 0,
            rgbPos = 0;

        for (let i = 0, ii = width * actualHeight; i < ii; i++) {
          dest[destPos++] = rgbBuf[rgbPos++];
          dest[destPos++] = rgbBuf[rgbPos++];
          dest[destPos++] = rgbBuf[rgbPos++];
          destPos += alpha01;
        }
      }
    }
  }

  get usesZeroToOneRange() {
    return (0, _util.shadow)(this, "usesZeroToOneRange", true);
  }

  static _cache(cacheKey, xref, localColorSpaceCache, parsedColorSpace) {
    if (!localColorSpaceCache) {
      throw new Error('ColorSpace._cache - expected "localColorSpaceCache" argument.');
    }

    if (!parsedColorSpace) {
      throw new Error('ColorSpace._cache - expected "parsedColorSpace" argument.');
    }

    let csName, csRef;

    if (cacheKey instanceof _primitives.Ref) {
      csRef = cacheKey;
      cacheKey = xref.fetch(cacheKey);
    }

    if (cacheKey instanceof _primitives.Name) {
      csName = cacheKey.name;
    }

    if (csName || csRef) {
      localColorSpaceCache.set(csName, csRef, parsedColorSpace);
    }
  }

  static getCached(cacheKey, xref, localColorSpaceCache) {
    if (!localColorSpaceCache) {
      throw new Error('ColorSpace.getCached - expected "localColorSpaceCache" argument.');
    }

    if (cacheKey instanceof _primitives.Ref) {
      const localColorSpace = localColorSpaceCache.getByRef(cacheKey);

      if (localColorSpace) {
        return localColorSpace;
      }

      try {
        cacheKey = xref.fetch(cacheKey);
      } catch (ex) {
        if (ex instanceof _core_utils.MissingDataException) {
          throw ex;
        }
      }
    }

    if (cacheKey instanceof _primitives.Name) {
      const localColorSpace = localColorSpaceCache.getByName(cacheKey.name);

      if (localColorSpace) {
        return localColorSpace;
      }
    }

    return null;
  }

  static async parseAsync({
    cs,
    xref,
    resources = null,
    pdfFunctionFactory,
    localColorSpaceCache
  }) {
    const parsedColorSpace = this._parse(cs, xref, resources, pdfFunctionFactory);

    this._cache(cs, xref, localColorSpaceCache, parsedColorSpace);

    return parsedColorSpace;
  }

  static parse({
    cs,
    xref,
    resources = null,
    pdfFunctionFactory,
    localColorSpaceCache
  }) {
    const cachedColorSpace = this.getCached(cs, xref, localColorSpaceCache);

    if (cachedColorSpace) {
      return cachedColorSpace;
    }

    const parsedColorSpace = this._parse(cs, xref, resources, pdfFunctionFactory);

    this._cache(cs, xref, localColorSpaceCache, parsedColorSpace);

    return parsedColorSpace;
  }

  static _parse(cs, xref, resources = null, pdfFunctionFactory) {
    cs = xref.fetchIfRef(cs);

    if (cs instanceof _primitives.Name) {
      switch (cs.name) {
        case "G":
        case "DeviceGray":
          return this.singletons.gray;

        case "RGB":
        case "DeviceRGB":
          return this.singletons.rgb;

        case "CMYK":
        case "DeviceCMYK":
          return this.singletons.cmyk;

        case "Pattern":
          return new PatternCS(null);

        default:
          if (resources instanceof _primitives.Dict) {
            const colorSpaces = resources.get("ColorSpace");

            if (colorSpaces instanceof _primitives.Dict) {
              const resourcesCS = colorSpaces.get(cs.name);

              if (resourcesCS) {
                if (resourcesCS instanceof _primitives.Name) {
                  return this._parse(resourcesCS, xref, resources, pdfFunctionFactory);
                }

                cs = resourcesCS;
                break;
              }
            }
          }

          throw new _util.FormatError(`Unrecognized ColorSpace: ${cs.name}`);
      }
    }

    if (Array.isArray(cs)) {
      const mode = xref.fetchIfRef(cs[0]).name;
      let params, numComps, baseCS, whitePoint, blackPoint, gamma;

      switch (mode) {
        case "G":
        case "DeviceGray":
          return this.singletons.gray;

        case "RGB":
        case "DeviceRGB":
          return this.singletons.rgb;

        case "CMYK":
        case "DeviceCMYK":
          return this.singletons.cmyk;

        case "CalGray":
          params = xref.fetchIfRef(cs[1]);
          whitePoint = params.getArray("WhitePoint");
          blackPoint = params.getArray("BlackPoint");
          gamma = params.get("Gamma");
          return new CalGrayCS(whitePoint, blackPoint, gamma);

        case "CalRGB":
          params = xref.fetchIfRef(cs[1]);
          whitePoint = params.getArray("WhitePoint");
          blackPoint = params.getArray("BlackPoint");
          gamma = params.getArray("Gamma");
          const matrix = params.getArray("Matrix");
          return new CalRGBCS(whitePoint, blackPoint, gamma, matrix);

        case "ICCBased":
          const stream = xref.fetchIfRef(cs[1]);
          const dict = stream.dict;
          numComps = dict.get("N");
          const alt = dict.get("Alternate");

          if (alt) {
            const altCS = this._parse(alt, xref, resources, pdfFunctionFactory);

            if (altCS.numComps === numComps) {
              return altCS;
            }

            (0, _util.warn)("ICCBased color space: Ignoring incorrect /Alternate entry.");
          }

          if (numComps === 1) {
            return this.singletons.gray;
          } else if (numComps === 3) {
            return this.singletons.rgb;
          } else if (numComps === 4) {
            return this.singletons.cmyk;
          }

          break;

        case "Pattern":
          baseCS = cs[1] || null;

          if (baseCS) {
            baseCS = this._parse(baseCS, xref, resources, pdfFunctionFactory);
          }

          return new PatternCS(baseCS);

        case "I":
        case "Indexed":
          baseCS = this._parse(cs[1], xref, resources, pdfFunctionFactory);
          const hiVal = xref.fetchIfRef(cs[2]) + 1;
          const lookup = xref.fetchIfRef(cs[3]);
          return new IndexedCS(baseCS, hiVal, lookup);

        case "Separation":
        case "DeviceN":
          const name = xref.fetchIfRef(cs[1]);
          numComps = Array.isArray(name) ? name.length : 1;
          baseCS = this._parse(cs[2], xref, resources, pdfFunctionFactory);
          const tintFn = pdfFunctionFactory.create(cs[3]);
          return new AlternateCS(numComps, baseCS, tintFn);

        case "Lab":
          params = xref.fetchIfRef(cs[1]);
          whitePoint = params.getArray("WhitePoint");
          blackPoint = params.getArray("BlackPoint");
          const range = params.getArray("Range");
          return new LabCS(whitePoint, blackPoint, range);

        default:
          throw new _util.FormatError(`Unimplemented ColorSpace object: ${mode}`);
      }
    }

    throw new _util.FormatError(`Unrecognized ColorSpace object: ${cs}`);
  }

  static isDefaultDecode(decode, numComps) {
    if (!Array.isArray(decode)) {
      return true;
    }

    if (numComps * 2 !== decode.length) {
      (0, _util.warn)("The decode map is not the correct length");
      return true;
    }

    for (let i = 0, ii = decode.length; i < ii; i += 2) {
      if (decode[i] !== 0 || decode[i + 1] !== 1) {
        return false;
      }
    }

    return true;
  }

  static get singletons() {
    return (0, _util.shadow)(this, "singletons", {
      get gray() {
        return (0, _util.shadow)(this, "gray", new DeviceGrayCS());
      },

      get rgb() {
        return (0, _util.shadow)(this, "rgb", new DeviceRgbCS());
      },

      get cmyk() {
        return (0, _util.shadow)(this, "cmyk", new DeviceCmykCS());
      }

    });
  }

}

exports.ColorSpace = ColorSpace;

class AlternateCS extends ColorSpace {
  constructor(numComps, base, tintFn) {
    super("Alternate", numComps);
    this.base = base;
    this.tintFn = tintFn;
    this.tmpBuf = new Float32Array(base.numComps);
  }

  getRgbItem(src, srcOffset, dest, destOffset) {
    const tmpBuf = this.tmpBuf;
    this.tintFn(src, srcOffset, tmpBuf, 0);
    this.base.getRgbItem(tmpBuf, 0, dest, destOffset);
  }

  getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
    const tintFn = this.tintFn;
    const base = this.base;
    const scale = 1 / ((1 << bits) - 1);
    const baseNumComps = base.numComps;
    const usesZeroToOneRange = base.usesZeroToOneRange;
    const isPassthrough = (base.isPassthrough(8) || !usesZeroToOneRange) && alpha01 === 0;
    let pos = isPassthrough ? destOffset : 0;
    const baseBuf = isPassthrough ? dest : new Uint8ClampedArray(baseNumComps * count);
    const numComps = this.numComps;
    const scaled = new Float32Array(numComps);
    const tinted = new Float32Array(baseNumComps);
    let i, j;

    for (i = 0; i < count; i++) {
      for (j = 0; j < numComps; j++) {
        scaled[j] = src[srcOffset++] * scale;
      }

      tintFn(scaled, 0, tinted, 0);

      if (usesZeroToOneRange) {
        for (j = 0; j < baseNumComps; j++) {
          baseBuf[pos++] = tinted[j] * 255;
        }
      } else {
        base.getRgbItem(tinted, 0, baseBuf, pos);
        pos += baseNumComps;
      }
    }

    if (!isPassthrough) {
      base.getRgbBuffer(baseBuf, 0, count, dest, destOffset, 8, alpha01);
    }
  }

  getOutputLength(inputLength, alpha01) {
    return this.base.getOutputLength(inputLength * this.base.numComps / this.numComps, alpha01);
  }

}

class PatternCS extends ColorSpace {
  constructor(baseCS) {
    super("Pattern", null);
    this.base = baseCS;
  }

  isDefaultDecode(decodeMap, bpc) {
    (0, _util.unreachable)("Should not call PatternCS.isDefaultDecode");
  }

}

class IndexedCS extends ColorSpace {
  constructor(base, highVal, lookup) {
    super("Indexed", 1);
    this.base = base;
    this.highVal = highVal;
    const length = base.numComps * highVal;
    this.lookup = new Uint8Array(length);

    if (lookup instanceof _base_stream.BaseStream) {
      const bytes = lookup.getBytes(length);
      this.lookup.set(bytes);
    } else if (typeof lookup === "string") {
      for (let i = 0; i < length; ++i) {
        this.lookup[i] = lookup.charCodeAt(i) & 0xff;
      }
    } else {
      throw new _util.FormatError(`IndexedCS - unrecognized lookup table: ${lookup}`);
    }
  }

  getRgbItem(src, srcOffset, dest, destOffset) {
    const numComps = this.base.numComps;
    const start = src[srcOffset] * numComps;
    this.base.getRgbBuffer(this.lookup, start, 1, dest, destOffset, 8, 0);
  }

  getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
    const base = this.base;
    const numComps = base.numComps;
    const outputDelta = base.getOutputLength(numComps, alpha01);
    const lookup = this.lookup;

    for (let i = 0; i < count; ++i) {
      const lookupPos = src[srcOffset++] * numComps;
      base.getRgbBuffer(lookup, lookupPos, 1, dest, destOffset, 8, alpha01);
      destOffset += outputDelta;
    }
  }

  getOutputLength(inputLength, alpha01) {
    return this.base.getOutputLength(inputLength * this.base.numComps, alpha01);
  }

  isDefaultDecode(decodeMap, bpc) {
    if (!Array.isArray(decodeMap)) {
      return true;
    }

    if (decodeMap.length !== 2) {
      (0, _util.warn)("Decode map length is not correct");
      return true;
    }

    if (!Number.isInteger(bpc) || bpc < 1) {
      (0, _util.warn)("Bits per component is not correct");
      return true;
    }

    return decodeMap[0] === 0 && decodeMap[1] === (1 << bpc) - 1;
  }

}

class DeviceGrayCS extends ColorSpace {
  constructor() {
    super("DeviceGray", 1);
  }

  getRgbItem(src, srcOffset, dest, destOffset) {
    const c = src[srcOffset] * 255;
    dest[destOffset] = dest[destOffset + 1] = dest[destOffset + 2] = c;
  }

  getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
    const scale = 255 / ((1 << bits) - 1);
    let j = srcOffset,
        q = destOffset;

    for (let i = 0; i < count; ++i) {
      const c = scale * src[j++];
      dest[q++] = c;
      dest[q++] = c;
      dest[q++] = c;
      q += alpha01;
    }
  }

  getOutputLength(inputLength, alpha01) {
    return inputLength * (3 + alpha01);
  }

}

class DeviceRgbCS extends ColorSpace {
  constructor() {
    super("DeviceRGB", 3);
  }

  getRgbItem(src, srcOffset, dest, destOffset) {
    dest[destOffset] = src[srcOffset] * 255;
    dest[destOffset + 1] = src[srcOffset + 1] * 255;
    dest[destOffset + 2] = src[srcOffset + 2] * 255;
  }

  getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
    if (bits === 8 && alpha01 === 0) {
      dest.set(src.subarray(srcOffset, srcOffset + count * 3), destOffset);
      return;
    }

    const scale = 255 / ((1 << bits) - 1);
    let j = srcOffset,
        q = destOffset;

    for (let i = 0; i < count; ++i) {
      dest[q++] = scale * src[j++];
      dest[q++] = scale * src[j++];
      dest[q++] = scale * src[j++];
      q += alpha01;
    }
  }

  getOutputLength(inputLength, alpha01) {
    return inputLength * (3 + alpha01) / 3 | 0;
  }

  isPassthrough(bits) {
    return bits === 8;
  }

}

const DeviceCmykCS = function DeviceCmykCSClosure() {
  function convertToRgb(src, srcOffset, srcScale, dest, destOffset) {
    const c = src[srcOffset] * srcScale;
    const m = src[srcOffset + 1] * srcScale;
    const y = src[srcOffset + 2] * srcScale;
    const k = src[srcOffset + 3] * srcScale;
    dest[destOffset] = 255 + c * (-4.387332384609988 * c + 54.48615194189176 * m + 18.82290502165302 * y + 212.25662451639585 * k + -285.2331026137004) + m * (1.7149763477362134 * m - 5.6096736904047315 * y + -17.873870861415444 * k - 5.497006427196366) + y * (-2.5217340131683033 * y - 21.248923337353073 * k + 17.5119270841813) + k * (-21.86122147463605 * k - 189.48180835922747);
    dest[destOffset + 1] = 255 + c * (8.841041422036149 * c + 60.118027045597366 * m + 6.871425592049007 * y + 31.159100130055922 * k + -79.2970844816548) + m * (-15.310361306967817 * m + 17.575251261109482 * y + 131.35250912493976 * k - 190.9453302588951) + y * (4.444339102852739 * y + 9.8632861493405 * k - 24.86741582555878) + k * (-20.737325471181034 * k - 187.80453709719578);
    dest[destOffset + 2] = 255 + c * (0.8842522430003296 * c + 8.078677503112928 * m + 30.89978309703729 * y - 0.23883238689178934 * k + -14.183576799673286) + m * (10.49593273432072 * m + 63.02378494754052 * y + 50.606957656360734 * k - 112.23884253719248) + y * (0.03296041114873217 * y + 115.60384449646641 * k + -193.58209356861505) + k * (-22.33816807309886 * k - 180.12613974708367);
  }

  class DeviceCmykCS extends ColorSpace {
    constructor() {
      super("DeviceCMYK", 4);
    }

    getRgbItem(src, srcOffset, dest, destOffset) {
      convertToRgb(src, srcOffset, 1, dest, destOffset);
    }

    getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
      const scale = 1 / ((1 << bits) - 1);

      for (let i = 0; i < count; i++) {
        convertToRgb(src, srcOffset, scale, dest, destOffset);
        srcOffset += 4;
        destOffset += 3 + alpha01;
      }
    }

    getOutputLength(inputLength, alpha01) {
      return inputLength / 4 * (3 + alpha01) | 0;
    }

  }

  return DeviceCmykCS;
}();

const CalGrayCS = function CalGrayCSClosure() {
  function convertToRgb(cs, src, srcOffset, dest, destOffset, scale) {
    const A = src[srcOffset] * scale;
    const AG = A ** cs.G;
    const L = cs.YW * AG;
    const val = Math.max(295.8 * L ** 0.3333333333333333 - 40.8, 0);
    dest[destOffset] = val;
    dest[destOffset + 1] = val;
    dest[destOffset + 2] = val;
  }

  class CalGrayCS extends ColorSpace {
    constructor(whitePoint, blackPoint, gamma) {
      super("CalGray", 1);

      if (!whitePoint) {
        throw new _util.FormatError("WhitePoint missing - required for color space CalGray");
      }

      blackPoint = blackPoint || [0, 0, 0];
      gamma = gamma || 1;
      this.XW = whitePoint[0];
      this.YW = whitePoint[1];
      this.ZW = whitePoint[2];
      this.XB = blackPoint[0];
      this.YB = blackPoint[1];
      this.ZB = blackPoint[2];
      this.G = gamma;

      if (this.XW < 0 || this.ZW < 0 || this.YW !== 1) {
        throw new _util.FormatError(`Invalid WhitePoint components for ${this.name}` + ", no fallback available");
      }

      if (this.XB < 0 || this.YB < 0 || this.ZB < 0) {
        (0, _util.info)(`Invalid BlackPoint for ${this.name}, falling back to default.`);
        this.XB = this.YB = this.ZB = 0;
      }

      if (this.XB !== 0 || this.YB !== 0 || this.ZB !== 0) {
        (0, _util.warn)(`${this.name}, BlackPoint: XB: ${this.XB}, YB: ${this.YB}, ` + `ZB: ${this.ZB}, only default values are supported.`);
      }

      if (this.G < 1) {
        (0, _util.info)(`Invalid Gamma: ${this.G} for ${this.name}, ` + "falling back to default.");
        this.G = 1;
      }
    }

    getRgbItem(src, srcOffset, dest, destOffset) {
      convertToRgb(this, src, srcOffset, dest, destOffset, 1);
    }

    getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
      const scale = 1 / ((1 << bits) - 1);

      for (let i = 0; i < count; ++i) {
        convertToRgb(this, src, srcOffset, dest, destOffset, scale);
        srcOffset += 1;
        destOffset += 3 + alpha01;
      }
    }

    getOutputLength(inputLength, alpha01) {
      return inputLength * (3 + alpha01);
    }

  }

  return CalGrayCS;
}();

const CalRGBCS = function CalRGBCSClosure() {
  const BRADFORD_SCALE_MATRIX = new Float32Array([0.8951, 0.2664, -0.1614, -0.7502, 1.7135, 0.0367, 0.0389, -0.0685, 1.0296]);
  const BRADFORD_SCALE_INVERSE_MATRIX = new Float32Array([0.9869929, -0.1470543, 0.1599627, 0.4323053, 0.5183603, 0.0492912, -0.0085287, 0.0400428, 0.9684867]);
  const SRGB_D65_XYZ_TO_RGB_MATRIX = new Float32Array([3.2404542, -1.5371385, -0.4985314, -0.9692660, 1.8760108, 0.0415560, 0.0556434, -0.2040259, 1.0572252]);
  const FLAT_WHITEPOINT_MATRIX = new Float32Array([1, 1, 1]);
  const tempNormalizeMatrix = new Float32Array(3);
  const tempConvertMatrix1 = new Float32Array(3);
  const tempConvertMatrix2 = new Float32Array(3);
  const DECODE_L_CONSTANT = ((8 + 16) / 116) ** 3 / 8.0;

  function matrixProduct(a, b, result) {
    result[0] = a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
    result[1] = a[3] * b[0] + a[4] * b[1] + a[5] * b[2];
    result[2] = a[6] * b[0] + a[7] * b[1] + a[8] * b[2];
  }

  function convertToFlat(sourceWhitePoint, LMS, result) {
    result[0] = LMS[0] * 1 / sourceWhitePoint[0];
    result[1] = LMS[1] * 1 / sourceWhitePoint[1];
    result[2] = LMS[2] * 1 / sourceWhitePoint[2];
  }

  function convertToD65(sourceWhitePoint, LMS, result) {
    const D65X = 0.95047;
    const D65Y = 1;
    const D65Z = 1.08883;
    result[0] = LMS[0] * D65X / sourceWhitePoint[0];
    result[1] = LMS[1] * D65Y / sourceWhitePoint[1];
    result[2] = LMS[2] * D65Z / sourceWhitePoint[2];
  }

  function sRGBTransferFunction(color) {
    if (color <= 0.0031308) {
      return adjustToRange(0, 1, 12.92 * color);
    }

    if (color >= 0.99554525) {
      return 1;
    }

    return adjustToRange(0, 1, (1 + 0.055) * color ** (1 / 2.4) - 0.055);
  }

  function adjustToRange(min, max, value) {
    return Math.max(min, Math.min(max, value));
  }

  function decodeL(L) {
    if (L < 0) {
      return -decodeL(-L);
    }

    if (L > 8.0) {
      return ((L + 16) / 116) ** 3;
    }

    return L * DECODE_L_CONSTANT;
  }

  function compensateBlackPoint(sourceBlackPoint, XYZ_Flat, result) {
    if (sourceBlackPoint[0] === 0 && sourceBlackPoint[1] === 0 && sourceBlackPoint[2] === 0) {
      result[0] = XYZ_Flat[0];
      result[1] = XYZ_Flat[1];
      result[2] = XYZ_Flat[2];
      return;
    }

    const zeroDecodeL = decodeL(0);
    const X_DST = zeroDecodeL;
    const X_SRC = decodeL(sourceBlackPoint[0]);
    const Y_DST = zeroDecodeL;
    const Y_SRC = decodeL(sourceBlackPoint[1]);
    const Z_DST = zeroDecodeL;
    const Z_SRC = decodeL(sourceBlackPoint[2]);
    const X_Scale = (1 - X_DST) / (1 - X_SRC);
    const X_Offset = 1 - X_Scale;
    const Y_Scale = (1 - Y_DST) / (1 - Y_SRC);
    const Y_Offset = 1 - Y_Scale;
    const Z_Scale = (1 - Z_DST) / (1 - Z_SRC);
    const Z_Offset = 1 - Z_Scale;
    result[0] = XYZ_Flat[0] * X_Scale + X_Offset;
    result[1] = XYZ_Flat[1] * Y_Scale + Y_Offset;
    result[2] = XYZ_Flat[2] * Z_Scale + Z_Offset;
  }

  function normalizeWhitePointToFlat(sourceWhitePoint, XYZ_In, result) {
    if (sourceWhitePoint[0] === 1 && sourceWhitePoint[2] === 1) {
      result[0] = XYZ_In[0];
      result[1] = XYZ_In[1];
      result[2] = XYZ_In[2];
      return;
    }

    const LMS = result;
    matrixProduct(BRADFORD_SCALE_MATRIX, XYZ_In, LMS);
    const LMS_Flat = tempNormalizeMatrix;
    convertToFlat(sourceWhitePoint, LMS, LMS_Flat);
    matrixProduct(BRADFORD_SCALE_INVERSE_MATRIX, LMS_Flat, result);
  }

  function normalizeWhitePointToD65(sourceWhitePoint, XYZ_In, result) {
    const LMS = result;
    matrixProduct(BRADFORD_SCALE_MATRIX, XYZ_In, LMS);
    const LMS_D65 = tempNormalizeMatrix;
    convertToD65(sourceWhitePoint, LMS, LMS_D65);
    matrixProduct(BRADFORD_SCALE_INVERSE_MATRIX, LMS_D65, result);
  }

  function convertToRgb(cs, src, srcOffset, dest, destOffset, scale) {
    const A = adjustToRange(0, 1, src[srcOffset] * scale);
    const B = adjustToRange(0, 1, src[srcOffset + 1] * scale);
    const C = adjustToRange(0, 1, src[srcOffset + 2] * scale);
    const AGR = A === 1 ? 1 : A ** cs.GR;
    const BGG = B === 1 ? 1 : B ** cs.GG;
    const CGB = C === 1 ? 1 : C ** cs.GB;
    const X = cs.MXA * AGR + cs.MXB * BGG + cs.MXC * CGB;
    const Y = cs.MYA * AGR + cs.MYB * BGG + cs.MYC * CGB;
    const Z = cs.MZA * AGR + cs.MZB * BGG + cs.MZC * CGB;
    const XYZ = tempConvertMatrix1;
    XYZ[0] = X;
    XYZ[1] = Y;
    XYZ[2] = Z;
    const XYZ_Flat = tempConvertMatrix2;
    normalizeWhitePointToFlat(cs.whitePoint, XYZ, XYZ_Flat);
    const XYZ_Black = tempConvertMatrix1;
    compensateBlackPoint(cs.blackPoint, XYZ_Flat, XYZ_Black);
    const XYZ_D65 = tempConvertMatrix2;
    normalizeWhitePointToD65(FLAT_WHITEPOINT_MATRIX, XYZ_Black, XYZ_D65);
    const SRGB = tempConvertMatrix1;
    matrixProduct(SRGB_D65_XYZ_TO_RGB_MATRIX, XYZ_D65, SRGB);
    dest[destOffset] = sRGBTransferFunction(SRGB[0]) * 255;
    dest[destOffset + 1] = sRGBTransferFunction(SRGB[1]) * 255;
    dest[destOffset + 2] = sRGBTransferFunction(SRGB[2]) * 255;
  }

  class CalRGBCS extends ColorSpace {
    constructor(whitePoint, blackPoint, gamma, matrix) {
      super("CalRGB", 3);

      if (!whitePoint) {
        throw new _util.FormatError("WhitePoint missing - required for color space CalRGB");
      }

      blackPoint = blackPoint || new Float32Array(3);
      gamma = gamma || new Float32Array([1, 1, 1]);
      matrix = matrix || new Float32Array([1, 0, 0, 0, 1, 0, 0, 0, 1]);
      const XW = whitePoint[0];
      const YW = whitePoint[1];
      const ZW = whitePoint[2];
      this.whitePoint = whitePoint;
      const XB = blackPoint[0];
      const YB = blackPoint[1];
      const ZB = blackPoint[2];
      this.blackPoint = blackPoint;
      this.GR = gamma[0];
      this.GG = gamma[1];
      this.GB = gamma[2];
      this.MXA = matrix[0];
      this.MYA = matrix[1];
      this.MZA = matrix[2];
      this.MXB = matrix[3];
      this.MYB = matrix[4];
      this.MZB = matrix[5];
      this.MXC = matrix[6];
      this.MYC = matrix[7];
      this.MZC = matrix[8];

      if (XW < 0 || ZW < 0 || YW !== 1) {
        throw new _util.FormatError(`Invalid WhitePoint components for ${this.name}` + ", no fallback available");
      }

      if (XB < 0 || YB < 0 || ZB < 0) {
        (0, _util.info)(`Invalid BlackPoint for ${this.name} [${XB}, ${YB}, ${ZB}], ` + "falling back to default.");
        this.blackPoint = new Float32Array(3);
      }

      if (this.GR < 0 || this.GG < 0 || this.GB < 0) {
        (0, _util.info)(`Invalid Gamma [${this.GR}, ${this.GG}, ${this.GB}] for ` + `${this.name}, falling back to default.`);
        this.GR = this.GG = this.GB = 1;
      }
    }

    getRgbItem(src, srcOffset, dest, destOffset) {
      convertToRgb(this, src, srcOffset, dest, destOffset, 1);
    }

    getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
      const scale = 1 / ((1 << bits) - 1);

      for (let i = 0; i < count; ++i) {
        convertToRgb(this, src, srcOffset, dest, destOffset, scale);
        srcOffset += 3;
        destOffset += 3 + alpha01;
      }
    }

    getOutputLength(inputLength, alpha01) {
      return inputLength * (3 + alpha01) / 3 | 0;
    }

  }

  return CalRGBCS;
}();

const LabCS = function LabCSClosure() {
  function fn_g(x) {
    let result;

    if (x >= 6 / 29) {
      result = x ** 3;
    } else {
      result = 108 / 841 * (x - 4 / 29);
    }

    return result;
  }

  function decode(value, high1, low2, high2) {
    return low2 + value * (high2 - low2) / high1;
  }

  function convertToRgb(cs, src, srcOffset, maxVal, dest, destOffset) {
    let Ls = src[srcOffset];
    let as = src[srcOffset + 1];
    let bs = src[srcOffset + 2];

    if (maxVal !== false) {
      Ls = decode(Ls, maxVal, 0, 100);
      as = decode(as, maxVal, cs.amin, cs.amax);
      bs = decode(bs, maxVal, cs.bmin, cs.bmax);
    }

    if (as > cs.amax) {
      as = cs.amax;
    } else if (as < cs.amin) {
      as = cs.amin;
    }

    if (bs > cs.bmax) {
      bs = cs.bmax;
    } else if (bs < cs.bmin) {
      bs = cs.bmin;
    }

    const M = (Ls + 16) / 116;
    const L = M + as / 500;
    const N = M - bs / 200;
    const X = cs.XW * fn_g(L);
    const Y = cs.YW * fn_g(M);
    const Z = cs.ZW * fn_g(N);
    let r, g, b;

    if (cs.ZW < 1) {
      r = X * 3.1339 + Y * -1.617 + Z * -0.4906;
      g = X * -0.9785 + Y * 1.916 + Z * 0.0333;
      b = X * 0.072 + Y * -0.229 + Z * 1.4057;
    } else {
      r = X * 3.2406 + Y * -1.5372 + Z * -0.4986;
      g = X * -0.9689 + Y * 1.8758 + Z * 0.0415;
      b = X * 0.0557 + Y * -0.204 + Z * 1.057;
    }

    dest[destOffset] = Math.sqrt(r) * 255;
    dest[destOffset + 1] = Math.sqrt(g) * 255;
    dest[destOffset + 2] = Math.sqrt(b) * 255;
  }

  class LabCS extends ColorSpace {
    constructor(whitePoint, blackPoint, range) {
      super("Lab", 3);

      if (!whitePoint) {
        throw new _util.FormatError("WhitePoint missing - required for color space Lab");
      }

      blackPoint = blackPoint || [0, 0, 0];
      range = range || [-100, 100, -100, 100];
      this.XW = whitePoint[0];
      this.YW = whitePoint[1];
      this.ZW = whitePoint[2];
      this.amin = range[0];
      this.amax = range[1];
      this.bmin = range[2];
      this.bmax = range[3];
      this.XB = blackPoint[0];
      this.YB = blackPoint[1];
      this.ZB = blackPoint[2];

      if (this.XW < 0 || this.ZW < 0 || this.YW !== 1) {
        throw new _util.FormatError("Invalid WhitePoint components, no fallback available");
      }

      if (this.XB < 0 || this.YB < 0 || this.ZB < 0) {
        (0, _util.info)("Invalid BlackPoint, falling back to default");
        this.XB = this.YB = this.ZB = 0;
      }

      if (this.amin > this.amax || this.bmin > this.bmax) {
        (0, _util.info)("Invalid Range, falling back to defaults");
        this.amin = -100;
        this.amax = 100;
        this.bmin = -100;
        this.bmax = 100;
      }
    }

    getRgbItem(src, srcOffset, dest, destOffset) {
      convertToRgb(this, src, srcOffset, false, dest, destOffset);
    }

    getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
      const maxVal = (1 << bits) - 1;

      for (let i = 0; i < count; i++) {
        convertToRgb(this, src, srcOffset, maxVal, dest, destOffset);
        srcOffset += 3;
        destOffset += 3 + alpha01;
      }
    }

    getOutputLength(inputLength, alpha01) {
      return inputLength * (3 + alpha01) / 3 | 0;
    }

    isDefaultDecode(decodeMap, bpc) {
      return true;
    }

    get usesZeroToOneRange() {
      return (0, _util.shadow)(this, "usesZeroToOneRange", false);
    }

  }

  return LabCS;
}();