pdfjs-dist
Version:
Generic build of Mozilla's PDF.js library.
1,080 lines (1,012 loc) • 39.6 kB
JavaScript
/**
* @licstart The following is the entire license notice for the
* Javascript code in this page
*
* Copyright 2018 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 = undefined;
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
var _util = require('../shared/util');
var _primitives = require('./primitives');
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function resizeRgbImage(src, dest, w1, h1, w2, h2, alpha01) {
var COMPONENTS = 3;
alpha01 = alpha01 !== 1 ? 0 : alpha01;
var xRatio = w1 / w2;
var yRatio = h1 / h2;
var newIndex = 0,
oldIndex = void 0;
var xScaled = new Uint16Array(w2);
var w1Scanline = w1 * COMPONENTS;
for (var i = 0; i < w2; i++) {
xScaled[i] = Math.floor(i * xRatio) * COMPONENTS;
}
for (var _i = 0; _i < h2; _i++) {
var py = Math.floor(_i * yRatio) * w1Scanline;
for (var j = 0; j < w2; j++) {
oldIndex = py + xScaled[j];
dest[newIndex++] = src[oldIndex++];
dest[newIndex++] = src[oldIndex++];
dest[newIndex++] = src[oldIndex++];
newIndex += alpha01;
}
}
}
var ColorSpace = function () {
function ColorSpace(name, numComps) {
_classCallCheck(this, ColorSpace);
if (this.constructor === ColorSpace) {
(0, _util.unreachable)('Cannot initialize ColorSpace.');
}
this.name = name;
this.numComps = numComps;
}
_createClass(ColorSpace, [{
key: 'getRgb',
value: function getRgb(src, srcOffset) {
var rgb = new Uint8ClampedArray(3);
this.getRgbItem(src, srcOffset, rgb, 0);
return rgb;
}
}, {
key: 'getRgbItem',
value: function getRgbItem(src, srcOffset, dest, destOffset) {
(0, _util.unreachable)('Should not call ColorSpace.getRgbItem');
}
}, {
key: 'getRgbBuffer',
value: function getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
(0, _util.unreachable)('Should not call ColorSpace.getRgbBuffer');
}
}, {
key: 'getOutputLength',
value: function getOutputLength(inputLength, alpha01) {
(0, _util.unreachable)('Should not call ColorSpace.getOutputLength');
}
}, {
key: 'isPassthrough',
value: function isPassthrough(bits) {
return false;
}
}, {
key: 'fillRgb',
value: function fillRgb(dest, originalWidth, originalHeight, width, height, actualHeight, bpc, comps, alpha01) {
var count = originalWidth * originalHeight;
var rgbBuf = null;
var numComponentColors = 1 << bpc;
var needsResizing = originalHeight !== height || originalWidth !== width;
if (this.isPassthrough(bpc)) {
rgbBuf = comps;
} else if (this.numComps === 1 && count > numComponentColors && this.name !== 'DeviceGray' && this.name !== 'DeviceRGB') {
var allColors = bpc <= 8 ? new Uint8Array(numComponentColors) : new Uint16Array(numComponentColors);
for (var i = 0; i < numComponentColors; i++) {
allColors[i] = i;
}
var colorMap = new Uint8ClampedArray(numComponentColors * 3);
this.getRgbBuffer(allColors, 0, numComponentColors, colorMap, 0, bpc, 0);
if (!needsResizing) {
var destPos = 0;
for (var _i2 = 0; _i2 < count; ++_i2) {
var key = comps[_i2] * 3;
dest[destPos++] = colorMap[key];
dest[destPos++] = colorMap[key + 1];
dest[destPos++] = colorMap[key + 2];
destPos += alpha01;
}
} else {
rgbBuf = new Uint8Array(count * 3);
var rgbPos = 0;
for (var _i3 = 0; _i3 < count; ++_i3) {
var _key = comps[_i3] * 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 {
var _destPos = 0,
_rgbPos = 0;
for (var _i4 = 0, ii = width * actualHeight; _i4 < ii; _i4++) {
dest[_destPos++] = rgbBuf[_rgbPos++];
dest[_destPos++] = rgbBuf[_rgbPos++];
dest[_destPos++] = rgbBuf[_rgbPos++];
_destPos += alpha01;
}
}
}
}
}, {
key: 'usesZeroToOneRange',
get: function get() {
return (0, _util.shadow)(this, 'usesZeroToOneRange', true);
}
}], [{
key: 'parse',
value: function parse(cs, xref, res, pdfFunctionFactory) {
var IR = this.parseToIR(cs, xref, res, pdfFunctionFactory);
return this.fromIR(IR);
}
}, {
key: 'fromIR',
value: function fromIR(IR) {
var name = Array.isArray(IR) ? IR[0] : IR;
var whitePoint = void 0,
blackPoint = void 0,
gamma = void 0;
switch (name) {
case 'DeviceGrayCS':
return this.singletons.gray;
case 'DeviceRgbCS':
return this.singletons.rgb;
case 'DeviceCmykCS':
return this.singletons.cmyk;
case 'CalGrayCS':
whitePoint = IR[1];
blackPoint = IR[2];
gamma = IR[3];
return new CalGrayCS(whitePoint, blackPoint, gamma);
case 'CalRGBCS':
whitePoint = IR[1];
blackPoint = IR[2];
gamma = IR[3];
var matrix = IR[4];
return new CalRGBCS(whitePoint, blackPoint, gamma, matrix);
case 'PatternCS':
var basePatternCS = IR[1];
if (basePatternCS) {
basePatternCS = this.fromIR(basePatternCS);
}
return new PatternCS(basePatternCS);
case 'IndexedCS':
var baseIndexedCS = IR[1];
var hiVal = IR[2];
var lookup = IR[3];
return new IndexedCS(this.fromIR(baseIndexedCS), hiVal, lookup);
case 'AlternateCS':
var numComps = IR[1];
var alt = IR[2];
var tintFn = IR[3];
return new AlternateCS(numComps, this.fromIR(alt), tintFn);
case 'LabCS':
whitePoint = IR[1];
blackPoint = IR[2];
var range = IR[3];
return new LabCS(whitePoint, blackPoint, range);
default:
throw new _util.FormatError('Unknown colorspace name: ' + name);
}
}
}, {
key: 'parseToIR',
value: function parseToIR(cs, xref) {
var res = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
var pdfFunctionFactory = arguments[3];
cs = xref.fetchIfRef(cs);
if ((0, _primitives.isName)(cs)) {
switch (cs.name) {
case 'DeviceGray':
case 'G':
return 'DeviceGrayCS';
case 'DeviceRGB':
case 'RGB':
return 'DeviceRgbCS';
case 'DeviceCMYK':
case 'CMYK':
return 'DeviceCmykCS';
case 'Pattern':
return ['PatternCS', null];
default:
if ((0, _primitives.isDict)(res)) {
var colorSpaces = res.get('ColorSpace');
if ((0, _primitives.isDict)(colorSpaces)) {
var resCS = colorSpaces.get(cs.name);
if (resCS) {
if ((0, _primitives.isName)(resCS)) {
return this.parseToIR(resCS, xref, res, pdfFunctionFactory);
}
cs = resCS;
break;
}
}
}
throw new _util.FormatError('unrecognized colorspace ' + cs.name);
}
}
if (Array.isArray(cs)) {
var mode = xref.fetchIfRef(cs[0]).name;
var numComps = void 0,
params = void 0,
alt = void 0,
whitePoint = void 0,
blackPoint = void 0,
gamma = void 0;
switch (mode) {
case 'DeviceGray':
case 'G':
return 'DeviceGrayCS';
case 'DeviceRGB':
case 'RGB':
return 'DeviceRgbCS';
case 'DeviceCMYK':
case 'CMYK':
return 'DeviceCmykCS';
case 'CalGray':
params = xref.fetchIfRef(cs[1]);
whitePoint = params.getArray('WhitePoint');
blackPoint = params.getArray('BlackPoint');
gamma = params.get('Gamma');
return ['CalGrayCS', whitePoint, blackPoint, gamma];
case 'CalRGB':
params = xref.fetchIfRef(cs[1]);
whitePoint = params.getArray('WhitePoint');
blackPoint = params.getArray('BlackPoint');
gamma = params.getArray('Gamma');
var matrix = params.getArray('Matrix');
return ['CalRGBCS', whitePoint, blackPoint, gamma, matrix];
case 'ICCBased':
var stream = xref.fetchIfRef(cs[1]);
var dict = stream.dict;
numComps = dict.get('N');
alt = dict.get('Alternate');
if (alt) {
var altIR = this.parseToIR(alt, xref, res, pdfFunctionFactory);
var altCS = this.fromIR(altIR, pdfFunctionFactory);
if (altCS.numComps === numComps) {
return altIR;
}
(0, _util.warn)('ICCBased color space: Ignoring incorrect /Alternate entry.');
}
if (numComps === 1) {
return 'DeviceGrayCS';
} else if (numComps === 3) {
return 'DeviceRgbCS';
} else if (numComps === 4) {
return 'DeviceCmykCS';
}
break;
case 'Pattern':
var basePatternCS = cs[1] || null;
if (basePatternCS) {
basePatternCS = this.parseToIR(basePatternCS, xref, res, pdfFunctionFactory);
}
return ['PatternCS', basePatternCS];
case 'Indexed':
case 'I':
var baseIndexedCS = this.parseToIR(cs[1], xref, res, pdfFunctionFactory);
var hiVal = xref.fetchIfRef(cs[2]) + 1;
var lookup = xref.fetchIfRef(cs[3]);
if ((0, _primitives.isStream)(lookup)) {
lookup = lookup.getBytes();
}
return ['IndexedCS', baseIndexedCS, hiVal, lookup];
case 'Separation':
case 'DeviceN':
var name = xref.fetchIfRef(cs[1]);
numComps = Array.isArray(name) ? name.length : 1;
alt = this.parseToIR(cs[2], xref, res, pdfFunctionFactory);
var tintFn = pdfFunctionFactory.create(xref.fetchIfRef(cs[3]));
return ['AlternateCS', numComps, alt, tintFn];
case 'Lab':
params = xref.fetchIfRef(cs[1]);
whitePoint = params.getArray('WhitePoint');
blackPoint = params.getArray('BlackPoint');
var range = params.getArray('Range');
return ['LabCS', whitePoint, blackPoint, range];
default:
throw new _util.FormatError('unimplemented color space object "' + mode + '"');
}
}
throw new _util.FormatError('unrecognized color space object: "' + cs + '"');
}
}, {
key: 'isDefaultDecode',
value: function isDefaultDecode(decode, n) {
if (!Array.isArray(decode)) {
return true;
}
if (n * 2 !== decode.length) {
(0, _util.warn)('The decode map is not the correct length');
return true;
}
for (var i = 0, ii = decode.length; i < ii; i += 2) {
if (decode[i] !== 0 || decode[i + 1] !== 1) {
return false;
}
}
return true;
}
}, {
key: 'singletons',
get: function get() {
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());
}
});
}
}]);
return ColorSpace;
}();
var AlternateCS = function (_ColorSpace) {
_inherits(AlternateCS, _ColorSpace);
function AlternateCS(numComps, base, tintFn) {
_classCallCheck(this, AlternateCS);
var _this = _possibleConstructorReturn(this, (AlternateCS.__proto__ || Object.getPrototypeOf(AlternateCS)).call(this, 'Alternate', numComps));
_this.base = base;
_this.tintFn = tintFn;
_this.tmpBuf = new Float32Array(base.numComps);
return _this;
}
_createClass(AlternateCS, [{
key: 'getRgbItem',
value: function getRgbItem(src, srcOffset, dest, destOffset) {
var tmpBuf = this.tmpBuf;
this.tintFn(src, srcOffset, tmpBuf, 0);
this.base.getRgbItem(tmpBuf, 0, dest, destOffset);
}
}, {
key: 'getRgbBuffer',
value: function getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
var tintFn = this.tintFn;
var base = this.base;
var scale = 1 / ((1 << bits) - 1);
var baseNumComps = base.numComps;
var usesZeroToOneRange = base.usesZeroToOneRange;
var isPassthrough = (base.isPassthrough(8) || !usesZeroToOneRange) && alpha01 === 0;
var pos = isPassthrough ? destOffset : 0;
var baseBuf = isPassthrough ? dest : new Uint8ClampedArray(baseNumComps * count);
var numComps = this.numComps;
var scaled = new Float32Array(numComps);
var tinted = new Float32Array(baseNumComps);
var i = void 0,
j = void 0;
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);
}
}
}, {
key: 'getOutputLength',
value: function getOutputLength(inputLength, alpha01) {
return this.base.getOutputLength(inputLength * this.base.numComps / this.numComps, alpha01);
}
}, {
key: 'isDefaultDecode',
value: function isDefaultDecode(decodeMap) {
return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
}
}]);
return AlternateCS;
}(ColorSpace);
var PatternCS = function (_ColorSpace2) {
_inherits(PatternCS, _ColorSpace2);
function PatternCS(baseCS) {
_classCallCheck(this, PatternCS);
var _this2 = _possibleConstructorReturn(this, (PatternCS.__proto__ || Object.getPrototypeOf(PatternCS)).call(this, 'Pattern', null));
_this2.base = baseCS;
return _this2;
}
return PatternCS;
}(ColorSpace);
var IndexedCS = function (_ColorSpace3) {
_inherits(IndexedCS, _ColorSpace3);
function IndexedCS(base, highVal, lookup) {
_classCallCheck(this, IndexedCS);
var _this3 = _possibleConstructorReturn(this, (IndexedCS.__proto__ || Object.getPrototypeOf(IndexedCS)).call(this, 'Indexed', 1));
_this3.base = base;
_this3.highVal = highVal;
var baseNumComps = base.numComps;
var length = baseNumComps * highVal;
if ((0, _primitives.isStream)(lookup)) {
_this3.lookup = new Uint8Array(length);
var bytes = lookup.getBytes(length);
_this3.lookup.set(bytes);
} else if ((0, _util.isString)(lookup)) {
_this3.lookup = new Uint8Array(length);
for (var i = 0; i < length; ++i) {
_this3.lookup[i] = lookup.charCodeAt(i);
}
} else if (lookup instanceof Uint8Array) {
_this3.lookup = lookup;
} else {
throw new _util.FormatError('Unrecognized lookup table: ' + lookup);
}
return _this3;
}
_createClass(IndexedCS, [{
key: 'getRgbItem',
value: function getRgbItem(src, srcOffset, dest, destOffset) {
var numComps = this.base.numComps;
var start = src[srcOffset] * numComps;
this.base.getRgbBuffer(this.lookup, start, 1, dest, destOffset, 8, 0);
}
}, {
key: 'getRgbBuffer',
value: function getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
var base = this.base;
var numComps = base.numComps;
var outputDelta = base.getOutputLength(numComps, alpha01);
var lookup = this.lookup;
for (var i = 0; i < count; ++i) {
var lookupPos = src[srcOffset++] * numComps;
base.getRgbBuffer(lookup, lookupPos, 1, dest, destOffset, 8, alpha01);
destOffset += outputDelta;
}
}
}, {
key: 'getOutputLength',
value: function getOutputLength(inputLength, alpha01) {
return this.base.getOutputLength(inputLength * this.base.numComps, alpha01);
}
}, {
key: 'isDefaultDecode',
value: function isDefaultDecode(decodeMap) {
return true;
}
}]);
return IndexedCS;
}(ColorSpace);
var DeviceGrayCS = function (_ColorSpace4) {
_inherits(DeviceGrayCS, _ColorSpace4);
function DeviceGrayCS() {
_classCallCheck(this, DeviceGrayCS);
return _possibleConstructorReturn(this, (DeviceGrayCS.__proto__ || Object.getPrototypeOf(DeviceGrayCS)).call(this, 'DeviceGray', 1));
}
_createClass(DeviceGrayCS, [{
key: 'getRgbItem',
value: function getRgbItem(src, srcOffset, dest, destOffset) {
var c = src[srcOffset] * 255;
dest[destOffset] = dest[destOffset + 1] = dest[destOffset + 2] = c;
}
}, {
key: 'getRgbBuffer',
value: function getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
var scale = 255 / ((1 << bits) - 1);
var j = srcOffset,
q = destOffset;
for (var i = 0; i < count; ++i) {
var c = scale * src[j++];
dest[q++] = c;
dest[q++] = c;
dest[q++] = c;
q += alpha01;
}
}
}, {
key: 'getOutputLength',
value: function getOutputLength(inputLength, alpha01) {
return inputLength * (3 + alpha01);
}
}, {
key: 'isDefaultDecode',
value: function isDefaultDecode(decodeMap) {
return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
}
}]);
return DeviceGrayCS;
}(ColorSpace);
var DeviceRgbCS = function (_ColorSpace5) {
_inherits(DeviceRgbCS, _ColorSpace5);
function DeviceRgbCS() {
_classCallCheck(this, DeviceRgbCS);
return _possibleConstructorReturn(this, (DeviceRgbCS.__proto__ || Object.getPrototypeOf(DeviceRgbCS)).call(this, 'DeviceRGB', 3));
}
_createClass(DeviceRgbCS, [{
key: 'getRgbItem',
value: function getRgbItem(src, srcOffset, dest, destOffset) {
dest[destOffset] = src[srcOffset] * 255;
dest[destOffset + 1] = src[srcOffset + 1] * 255;
dest[destOffset + 2] = src[srcOffset + 2] * 255;
}
}, {
key: 'getRgbBuffer',
value: function getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
if (bits === 8 && alpha01 === 0) {
dest.set(src.subarray(srcOffset, srcOffset + count * 3), destOffset);
return;
}
var scale = 255 / ((1 << bits) - 1);
var j = srcOffset,
q = destOffset;
for (var i = 0; i < count; ++i) {
dest[q++] = scale * src[j++];
dest[q++] = scale * src[j++];
dest[q++] = scale * src[j++];
q += alpha01;
}
}
}, {
key: 'getOutputLength',
value: function getOutputLength(inputLength, alpha01) {
return inputLength * (3 + alpha01) / 3 | 0;
}
}, {
key: 'isPassthrough',
value: function isPassthrough(bits) {
return bits === 8;
}
}, {
key: 'isDefaultDecode',
value: function isDefaultDecode(decodeMap) {
return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
}
}]);
return DeviceRgbCS;
}(ColorSpace);
var DeviceCmykCS = function DeviceCmykCSClosure() {
function convertToRgb(src, srcOffset, srcScale, dest, destOffset) {
var c = src[srcOffset] * srcScale;
var m = src[srcOffset + 1] * srcScale;
var y = src[srcOffset + 2] * srcScale;
var 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);
}
var DeviceCmykCS = function (_ColorSpace6) {
_inherits(DeviceCmykCS, _ColorSpace6);
function DeviceCmykCS() {
_classCallCheck(this, DeviceCmykCS);
return _possibleConstructorReturn(this, (DeviceCmykCS.__proto__ || Object.getPrototypeOf(DeviceCmykCS)).call(this, 'DeviceCMYK', 4));
}
_createClass(DeviceCmykCS, [{
key: 'getRgbItem',
value: function getRgbItem(src, srcOffset, dest, destOffset) {
convertToRgb(src, srcOffset, 1, dest, destOffset);
}
}, {
key: 'getRgbBuffer',
value: function getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
var scale = 1 / ((1 << bits) - 1);
for (var i = 0; i < count; i++) {
convertToRgb(src, srcOffset, scale, dest, destOffset);
srcOffset += 4;
destOffset += 3 + alpha01;
}
}
}, {
key: 'getOutputLength',
value: function getOutputLength(inputLength, alpha01) {
return inputLength / 4 * (3 + alpha01) | 0;
}
}, {
key: 'isDefaultDecode',
value: function isDefaultDecode(decodeMap) {
return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
}
}]);
return DeviceCmykCS;
}(ColorSpace);
return DeviceCmykCS;
}();
var CalGrayCS = function CalGrayCSClosure() {
function convertToRgb(cs, src, srcOffset, dest, destOffset, scale) {
var A = src[srcOffset] * scale;
var AG = Math.pow(A, cs.G);
var L = cs.YW * AG;
var val = Math.max(295.8 * Math.pow(L, 0.333333333333333333) - 40.8, 0);
dest[destOffset] = val;
dest[destOffset + 1] = val;
dest[destOffset + 2] = val;
}
var CalGrayCS = function (_ColorSpace7) {
_inherits(CalGrayCS, _ColorSpace7);
function CalGrayCS(whitePoint, blackPoint, gamma) {
_classCallCheck(this, CalGrayCS);
var _this7 = _possibleConstructorReturn(this, (CalGrayCS.__proto__ || Object.getPrototypeOf(CalGrayCS)).call(this, 'CalGray', 1));
if (!whitePoint) {
throw new _util.FormatError('WhitePoint missing - required for color space CalGray');
}
blackPoint = blackPoint || [0, 0, 0];
gamma = gamma || 1;
_this7.XW = whitePoint[0];
_this7.YW = whitePoint[1];
_this7.ZW = whitePoint[2];
_this7.XB = blackPoint[0];
_this7.YB = blackPoint[1];
_this7.ZB = blackPoint[2];
_this7.G = gamma;
if (_this7.XW < 0 || _this7.ZW < 0 || _this7.YW !== 1) {
throw new _util.FormatError('Invalid WhitePoint components for ' + _this7.name + ', no fallback available');
}
if (_this7.XB < 0 || _this7.YB < 0 || _this7.ZB < 0) {
(0, _util.info)('Invalid BlackPoint for ' + _this7.name + ', falling back to default.');
_this7.XB = _this7.YB = _this7.ZB = 0;
}
if (_this7.XB !== 0 || _this7.YB !== 0 || _this7.ZB !== 0) {
(0, _util.warn)(_this7.name + ', BlackPoint: XB: ' + _this7.XB + ', YB: ' + _this7.YB + ', ' + ('ZB: ' + _this7.ZB + ', only default values are supported.'));
}
if (_this7.G < 1) {
(0, _util.info)('Invalid Gamma: ' + _this7.G + ' for ' + _this7.name + ', ' + 'falling back to default.');
_this7.G = 1;
}
return _this7;
}
_createClass(CalGrayCS, [{
key: 'getRgbItem',
value: function getRgbItem(src, srcOffset, dest, destOffset) {
convertToRgb(this, src, srcOffset, dest, destOffset, 1);
}
}, {
key: 'getRgbBuffer',
value: function getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
var scale = 1 / ((1 << bits) - 1);
for (var i = 0; i < count; ++i) {
convertToRgb(this, src, srcOffset, dest, destOffset, scale);
srcOffset += 1;
destOffset += 3 + alpha01;
}
}
}, {
key: 'getOutputLength',
value: function getOutputLength(inputLength, alpha01) {
return inputLength * (3 + alpha01);
}
}, {
key: 'isDefaultDecode',
value: function isDefaultDecode(decodeMap) {
return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
}
}]);
return CalGrayCS;
}(ColorSpace);
return CalGrayCS;
}();
var CalRGBCS = function CalRGBCSClosure() {
var BRADFORD_SCALE_MATRIX = new Float32Array([0.8951, 0.2664, -0.1614, -0.7502, 1.7135, 0.0367, 0.0389, -0.0685, 1.0296]);
var BRADFORD_SCALE_INVERSE_MATRIX = new Float32Array([0.9869929, -0.1470543, 0.1599627, 0.4323053, 0.5183603, 0.0492912, -0.0085287, 0.0400428, 0.9684867]);
var 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]);
var FLAT_WHITEPOINT_MATRIX = new Float32Array([1, 1, 1]);
var tempNormalizeMatrix = new Float32Array(3);
var tempConvertMatrix1 = new Float32Array(3);
var tempConvertMatrix2 = new Float32Array(3);
var DECODE_L_CONSTANT = Math.pow((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) {
var D65X = 0.95047;
var D65Y = 1;
var 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);
}
return adjustToRange(0, 1, (1 + 0.055) * Math.pow(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 Math.pow((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;
}
var zeroDecodeL = decodeL(0);
var X_DST = zeroDecodeL;
var X_SRC = decodeL(sourceBlackPoint[0]);
var Y_DST = zeroDecodeL;
var Y_SRC = decodeL(sourceBlackPoint[1]);
var Z_DST = zeroDecodeL;
var Z_SRC = decodeL(sourceBlackPoint[2]);
var X_Scale = (1 - X_DST) / (1 - X_SRC);
var X_Offset = 1 - X_Scale;
var Y_Scale = (1 - Y_DST) / (1 - Y_SRC);
var Y_Offset = 1 - Y_Scale;
var Z_Scale = (1 - Z_DST) / (1 - Z_SRC);
var 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;
}
var LMS = result;
matrixProduct(BRADFORD_SCALE_MATRIX, XYZ_In, LMS);
var LMS_Flat = tempNormalizeMatrix;
convertToFlat(sourceWhitePoint, LMS, LMS_Flat);
matrixProduct(BRADFORD_SCALE_INVERSE_MATRIX, LMS_Flat, result);
}
function normalizeWhitePointToD65(sourceWhitePoint, XYZ_In, result) {
var LMS = result;
matrixProduct(BRADFORD_SCALE_MATRIX, XYZ_In, LMS);
var LMS_D65 = tempNormalizeMatrix;
convertToD65(sourceWhitePoint, LMS, LMS_D65);
matrixProduct(BRADFORD_SCALE_INVERSE_MATRIX, LMS_D65, result);
}
function convertToRgb(cs, src, srcOffset, dest, destOffset, scale) {
var A = adjustToRange(0, 1, src[srcOffset] * scale);
var B = adjustToRange(0, 1, src[srcOffset + 1] * scale);
var C = adjustToRange(0, 1, src[srcOffset + 2] * scale);
var AGR = Math.pow(A, cs.GR);
var BGG = Math.pow(B, cs.GG);
var CGB = Math.pow(C, cs.GB);
var X = cs.MXA * AGR + cs.MXB * BGG + cs.MXC * CGB;
var Y = cs.MYA * AGR + cs.MYB * BGG + cs.MYC * CGB;
var Z = cs.MZA * AGR + cs.MZB * BGG + cs.MZC * CGB;
var XYZ = tempConvertMatrix1;
XYZ[0] = X;
XYZ[1] = Y;
XYZ[2] = Z;
var XYZ_Flat = tempConvertMatrix2;
normalizeWhitePointToFlat(cs.whitePoint, XYZ, XYZ_Flat);
var XYZ_Black = tempConvertMatrix1;
compensateBlackPoint(cs.blackPoint, XYZ_Flat, XYZ_Black);
var XYZ_D65 = tempConvertMatrix2;
normalizeWhitePointToD65(FLAT_WHITEPOINT_MATRIX, XYZ_Black, XYZ_D65);
var 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;
}
var CalRGBCS = function (_ColorSpace8) {
_inherits(CalRGBCS, _ColorSpace8);
function CalRGBCS(whitePoint, blackPoint, gamma, matrix) {
_classCallCheck(this, CalRGBCS);
var _this8 = _possibleConstructorReturn(this, (CalRGBCS.__proto__ || Object.getPrototypeOf(CalRGBCS)).call(this, '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]);
var XW = whitePoint[0];
var YW = whitePoint[1];
var ZW = whitePoint[2];
_this8.whitePoint = whitePoint;
var XB = blackPoint[0];
var YB = blackPoint[1];
var ZB = blackPoint[2];
_this8.blackPoint = blackPoint;
_this8.GR = gamma[0];
_this8.GG = gamma[1];
_this8.GB = gamma[2];
_this8.MXA = matrix[0];
_this8.MYA = matrix[1];
_this8.MZA = matrix[2];
_this8.MXB = matrix[3];
_this8.MYB = matrix[4];
_this8.MZB = matrix[5];
_this8.MXC = matrix[6];
_this8.MYC = matrix[7];
_this8.MZC = matrix[8];
if (XW < 0 || ZW < 0 || YW !== 1) {
throw new _util.FormatError('Invalid WhitePoint components for ' + _this8.name + ', no fallback available');
}
if (XB < 0 || YB < 0 || ZB < 0) {
(0, _util.info)('Invalid BlackPoint for ' + _this8.name + ' [' + XB + ', ' + YB + ', ' + ZB + '], ' + 'falling back to default.');
_this8.blackPoint = new Float32Array(3);
}
if (_this8.GR < 0 || _this8.GG < 0 || _this8.GB < 0) {
(0, _util.info)('Invalid Gamma [' + _this8.GR + ', ' + _this8.GG + ', ' + _this8.GB + '] for ' + (_this8.name + ', falling back to default.'));
_this8.GR = _this8.GG = _this8.GB = 1;
}
return _this8;
}
_createClass(CalRGBCS, [{
key: 'getRgbItem',
value: function getRgbItem(src, srcOffset, dest, destOffset) {
convertToRgb(this, src, srcOffset, dest, destOffset, 1);
}
}, {
key: 'getRgbBuffer',
value: function getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
var scale = 1 / ((1 << bits) - 1);
for (var i = 0; i < count; ++i) {
convertToRgb(this, src, srcOffset, dest, destOffset, scale);
srcOffset += 3;
destOffset += 3 + alpha01;
}
}
}, {
key: 'getOutputLength',
value: function getOutputLength(inputLength, alpha01) {
return inputLength * (3 + alpha01) / 3 | 0;
}
}, {
key: 'isDefaultDecode',
value: function isDefaultDecode(decodeMap) {
return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
}
}]);
return CalRGBCS;
}(ColorSpace);
return CalRGBCS;
}();
var LabCS = function LabCSClosure() {
function fn_g(x) {
var result = void 0;
if (x >= 6 / 29) {
result = x * x * x;
} 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) {
var Ls = src[srcOffset];
var as = src[srcOffset + 1];
var 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);
}
as = as > cs.amax ? cs.amax : as < cs.amin ? cs.amin : as;
bs = bs > cs.bmax ? cs.bmax : bs < cs.bmin ? cs.bmin : bs;
var M = (Ls + 16) / 116;
var L = M + as / 500;
var N = M - bs / 200;
var X = cs.XW * fn_g(L);
var Y = cs.YW * fn_g(M);
var Z = cs.ZW * fn_g(N);
var r = void 0,
g = void 0,
b = void 0;
if (cs.ZW < 1) {
r = X * 3.1339 + Y * -1.6170 + Z * -0.4906;
g = X * -0.9785 + Y * 1.9160 + Z * 0.0333;
b = X * 0.0720 + Y * -0.2290 + 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 * -0.2040 + Z * 1.0570;
}
dest[destOffset] = Math.sqrt(r) * 255;
dest[destOffset + 1] = Math.sqrt(g) * 255;
dest[destOffset + 2] = Math.sqrt(b) * 255;
}
var LabCS = function (_ColorSpace9) {
_inherits(LabCS, _ColorSpace9);
function LabCS(whitePoint, blackPoint, range) {
_classCallCheck(this, LabCS);
var _this9 = _possibleConstructorReturn(this, (LabCS.__proto__ || Object.getPrototypeOf(LabCS)).call(this, '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];
_this9.XW = whitePoint[0];
_this9.YW = whitePoint[1];
_this9.ZW = whitePoint[2];
_this9.amin = range[0];
_this9.amax = range[1];
_this9.bmin = range[2];
_this9.bmax = range[3];
_this9.XB = blackPoint[0];
_this9.YB = blackPoint[1];
_this9.ZB = blackPoint[2];
if (_this9.XW < 0 || _this9.ZW < 0 || _this9.YW !== 1) {
throw new _util.FormatError('Invalid WhitePoint components, no fallback available');
}
if (_this9.XB < 0 || _this9.YB < 0 || _this9.ZB < 0) {
(0, _util.info)('Invalid BlackPoint, falling back to default');
_this9.XB = _this9.YB = _this9.ZB = 0;
}
if (_this9.amin > _this9.amax || _this9.bmin > _this9.bmax) {
(0, _util.info)('Invalid Range, falling back to defaults');
_this9.amin = -100;
_this9.amax = 100;
_this9.bmin = -100;
_this9.bmax = 100;
}
return _this9;
}
_createClass(LabCS, [{
key: 'getRgbItem',
value: function getRgbItem(src, srcOffset, dest, destOffset) {
convertToRgb(this, src, srcOffset, false, dest, destOffset);
}
}, {
key: 'getRgbBuffer',
value: function getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
var maxVal = (1 << bits) - 1;
for (var i = 0; i < count; i++) {
convertToRgb(this, src, srcOffset, maxVal, dest, destOffset);
srcOffset += 3;
destOffset += 3 + alpha01;
}
}
}, {
key: 'getOutputLength',
value: function getOutputLength(inputLength, alpha01) {
return inputLength * (3 + alpha01) / 3 | 0;
}
}, {
key: 'isDefaultDecode',
value: function isDefaultDecode(decodeMap) {
return true;
}
}, {
key: 'usesZeroToOneRange',
get: function get() {
return (0, _util.shadow)(this, 'usesZeroToOneRange', false);
}
}]);
return LabCS;
}(ColorSpace);
return LabCS;
}();
exports.ColorSpace = ColorSpace;