pdfjs-dist
Version:
Generic build of Mozilla's PDF.js library.
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JavaScript
/**
* @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;
}();