The Tor Browser: comparison browser/extensions/pdfjs/content/build/pdf.js

comparison: browser/extensions/pdfjs/content/build/pdf.js

browser/extensions/pdfjs/content/build/pdf.js

changeset 0: 6474c204b198

equal deleted inserted replaced

--1:000000000000
+:f0f886bc4be0
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* Copyright 2012 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.
+*/
+/*jshint globalstrict: false */
+// Initializing PDFJS global object (if still undefined)
+if (typeof PDFJS === 'undefined') {
+(typeof window !== 'undefined' ? window : this).PDFJS = {};
+}
+PDFJS.version = '1.0.68';
+PDFJS.build = 'ead4cbf';
+(function pdfjsWrapper() {
+// Use strict in our context only - users might not want it
+'use strict';
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* Copyright 2012 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.
+*/
+/* globals Cmd, ColorSpace, Dict, MozBlobBuilder, Name, PDFJS, Ref, URL,
+Promise */
+'use strict';
+var globalScope = (typeof window === 'undefined') ? this : window;
+var isWorker = (typeof window == 'undefined');
+var FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0];
+var TextRenderingMode = {
+FILL: 0,
+STROKE: 1,
+FILL_STROKE: 2,
+INVISIBLE: 3,
+FILL_ADD_TO_PATH: 4,
+STROKE_ADD_TO_PATH: 5,
+FILL_STROKE_ADD_TO_PATH: 6,
+ADD_TO_PATH: 7,
+FILL_STROKE_MASK: 3,
+ADD_TO_PATH_FLAG: 4
+};
+var ImageKind = {
+GRAYSCALE_1BPP: 1,
+RGB_24BPP: 2,
+RGBA_32BPP: 3
+};
+// The global PDFJS object exposes the API
+// In production, it will be declared outside a global wrapper
+// In development, it will be declared here
+if (!globalScope.PDFJS) {
+globalScope.PDFJS = {};
+}
+globalScope.PDFJS.pdfBug = false;
+PDFJS.VERBOSITY_LEVELS = {
+errors: 0,
+warnings: 1,
+infos: 5
+};
+// All the possible operations for an operator list.
+var OPS = PDFJS.OPS = {
+// Intentionally start from 1 so it is easy to spot bad operators that will be
+// 0's.
+dependency: 1,
+setLineWidth: 2,
+setLineCap: 3,
+setLineJoin: 4,
+setMiterLimit: 5,
+setDash: 6,
+setRenderingIntent: 7,
+setFlatness: 8,
+setGState: 9,
+save: 10,
+restore: 11,
+transform: 12,
+moveTo: 13,
+lineTo: 14,
+curveTo: 15,
+curveTo2: 16,
+curveTo3: 17,
+closePath: 18,
+rectangle: 19,
+stroke: 20,
+closeStroke: 21,
+fill: 22,
+eoFill: 23,
+fillStroke: 24,
+eoFillStroke: 25,
+closeFillStroke: 26,
+closeEOFillStroke: 27,
+endPath: 28,
+clip: 29,
+eoClip: 30,
+beginText: 31,
+endText: 32,
+setCharSpacing: 33,
+setWordSpacing: 34,
+setHScale: 35,
+setLeading: 36,
+setFont: 37,
+setTextRenderingMode: 38,
+setTextRise: 39,
+moveText: 40,
+setLeadingMoveText: 41,
+setTextMatrix: 42,
+nextLine: 43,
+showText: 44,
+showSpacedText: 45,
+nextLineShowText: 46,
+nextLineSetSpacingShowText: 47,
+setCharWidth: 48,
+setCharWidthAndBounds: 49,
+setStrokeColorSpace: 50,
+setFillColorSpace: 51,
+setStrokeColor: 52,
+setStrokeColorN: 53,
+setFillColor: 54,
+setFillColorN: 55,
+setStrokeGray: 56,
+setFillGray: 57,
+setStrokeRGBColor: 58,
+setFillRGBColor: 59,
+setStrokeCMYKColor: 60,
+setFillCMYKColor: 61,
+shadingFill: 62,
+beginInlineImage: 63,
+beginImageData: 64,
+endInlineImage: 65,
+paintXObject: 66,
+markPoint: 67,
+markPointProps: 68,
+beginMarkedContent: 69,
+beginMarkedContentProps: 70,
+endMarkedContent: 71,
+beginCompat: 72,
+endCompat: 73,
+paintFormXObjectBegin: 74,
+paintFormXObjectEnd: 75,
+beginGroup: 76,
+endGroup: 77,
+beginAnnotations: 78,
+endAnnotations: 79,
+beginAnnotation: 80,
+endAnnotation: 81,
+paintJpegXObject: 82,
+paintImageMaskXObject: 83,
+paintImageMaskXObjectGroup: 84,
+paintImageXObject: 85,
+paintInlineImageXObject: 86,
+paintInlineImageXObjectGroup: 87,
+paintImageXObjectRepeat: 88,
+paintImageMaskXObjectRepeat: 89,
+paintSolidColorImageMask: 90
+};
+// A notice for devs. These are good for things that are helpful to devs, such
+// as warning that Workers were disabled, which is important to devs but not
+// end users.
+function info(msg) {
+if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.infos) {
+console.log('Info: ' + msg);
+}
+}
+// Non-fatal warnings.
+function warn(msg) {
+if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.warnings) {
+console.log('Warning: ' + msg);
+}
+}
+// Fatal errors that should trigger the fallback UI and halt execution by
+// throwing an exception.
+function error(msg) {
+// If multiple arguments were passed, pass them all to the log function.
+if (arguments.length > 1) {
+var logArguments = ['Error:'];
+logArguments.push.apply(logArguments, arguments);
+console.log.apply(console, logArguments);
+// Join the arguments into a single string for the lines below.
+msg = [].join.call(arguments, ' ');
+} else {
+console.log('Error: ' + msg);
+}
+console.log(backtrace());
+UnsupportedManager.notify(UNSUPPORTED_FEATURES.unknown);
+throw new Error(msg);
+}
+function backtrace() {
+try {
+throw new Error();
+} catch (e) {
+return e.stack ? e.stack.split('\n').slice(2).join('\n') : '';
+}
+}
+function assert(cond, msg) {
+if (!cond) {
+error(msg);
+}
+}
+var UNSUPPORTED_FEATURES = PDFJS.UNSUPPORTED_FEATURES = {
+unknown: 'unknown',
+forms: 'forms',
+javaScript: 'javaScript',
+smask: 'smask',
+shadingPattern: 'shadingPattern',
+font: 'font'
+};
+var UnsupportedManager = PDFJS.UnsupportedManager =
+(function UnsupportedManagerClosure() {
+var listeners = [];
+return {
+listen: function (cb) {
+listeners.push(cb);
+},
+notify: function (featureId) {
+warn('Unsupported feature "' + featureId + '"');
+for (var i = 0, ii = listeners.length; i < ii; i++) {
+listeners[i](featureId);
+}
+}
+};
+})();
+// Combines two URLs. The baseUrl shall be absolute URL. If the url is an
+// absolute URL, it will be returned as is.
+function combineUrl(baseUrl, url) {
+if (!url) {
+return baseUrl;
+}
+if (/^[a-z][a-z0-9+\-.]*:/i.test(url)) {
+return url;
+}
+var i;
+if (url.charAt(0) == '/') {
+// absolute path
+i = baseUrl.indexOf('://');
+if (url.charAt(1) === '/') {
+++i;
+} else {
+i = baseUrl.indexOf('/', i + 3);
+}
+return baseUrl.substring(0, i) + url;
+} else {
+// relative path
+var pathLength = baseUrl.length;
+i = baseUrl.lastIndexOf('#');
+pathLength = i >= 0 ? i : pathLength;
+i = baseUrl.lastIndexOf('?', pathLength);
+pathLength = i >= 0 ? i : pathLength;
+var prefixLength = baseUrl.lastIndexOf('/', pathLength);
+return baseUrl.substring(0, prefixLength + 1) + url;
+}
+}
+// Validates if URL is safe and allowed, e.g. to avoid XSS.
+function isValidUrl(url, allowRelative) {
+if (!url) {
+return false;
+}
+// RFC 3986 (http://tools.ietf.org/html/rfc3986#section-3.1)
+// scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
+var protocol = /^[a-z][a-z0-9+\-.]*(?=:)/i.exec(url);
+if (!protocol) {
+return allowRelative;
+}
+protocol = protocol[0].toLowerCase();
+switch (protocol) {
+case 'http':
+case 'https':
+case 'ftp':
+case 'mailto':
+return true;
+default:
+return false;
+}
+}
+PDFJS.isValidUrl = isValidUrl;
+function shadow(obj, prop, value) {
+Object.defineProperty(obj, prop, { value: value,
+enumerable: true,
+configurable: true,
+writable: false });
+return value;
+}
+var PasswordResponses = PDFJS.PasswordResponses = {
+NEED_PASSWORD: 1,
+INCORRECT_PASSWORD: 2
+};
+var PasswordException = (function PasswordExceptionClosure() {
+function PasswordException(msg, code) {
+this.name = 'PasswordException';
+this.message = msg;
+this.code = code;
+}
+PasswordException.prototype = new Error();
+PasswordException.constructor = PasswordException;
+return PasswordException;
+})();
+var UnknownErrorException = (function UnknownErrorExceptionClosure() {
+function UnknownErrorException(msg, details) {
+this.name = 'UnknownErrorException';
+this.message = msg;
+this.details = details;
+}
+UnknownErrorException.prototype = new Error();
+UnknownErrorException.constructor = UnknownErrorException;
+return UnknownErrorException;
+})();
+var InvalidPDFException = (function InvalidPDFExceptionClosure() {
+function InvalidPDFException(msg) {
+this.name = 'InvalidPDFException';
+this.message = msg;
+}
+InvalidPDFException.prototype = new Error();
+InvalidPDFException.constructor = InvalidPDFException;
+return InvalidPDFException;
+})();
+var MissingPDFException = (function MissingPDFExceptionClosure() {
+function MissingPDFException(msg) {
+this.name = 'MissingPDFException';
+this.message = msg;
+}
+MissingPDFException.prototype = new Error();
+MissingPDFException.constructor = MissingPDFException;
+return MissingPDFException;
+})();
+var NotImplementedException = (function NotImplementedExceptionClosure() {
+function NotImplementedException(msg) {
+this.message = msg;
+}
+NotImplementedException.prototype = new Error();
+NotImplementedException.prototype.name = 'NotImplementedException';
+NotImplementedException.constructor = NotImplementedException;
+return NotImplementedException;
+})();
+var MissingDataException = (function MissingDataExceptionClosure() {
+function MissingDataException(begin, end) {
+this.begin = begin;
+this.end = end;
+this.message = 'Missing data [' + begin + ', ' + end + ')';
+}
+MissingDataException.prototype = new Error();
+MissingDataException.prototype.name = 'MissingDataException';
+MissingDataException.constructor = MissingDataException;
+return MissingDataException;
+})();
+var XRefParseException = (function XRefParseExceptionClosure() {
+function XRefParseException(msg) {
+this.message = msg;
+}
+XRefParseException.prototype = new Error();
+XRefParseException.prototype.name = 'XRefParseException';
+XRefParseException.constructor = XRefParseException;
+return XRefParseException;
+})();
+function bytesToString(bytes) {
+var length = bytes.length;
+var MAX_ARGUMENT_COUNT = 8192;
+if (length < MAX_ARGUMENT_COUNT) {
+return String.fromCharCode.apply(null, bytes);
+}
+var strBuf = [];
+for (var i = 0; i < length; i += MAX_ARGUMENT_COUNT) {
+var chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length);
+var chunk = bytes.subarray(i, chunkEnd);
+strBuf.push(String.fromCharCode.apply(null, chunk));
+}
+return strBuf.join('');
+}
+function stringToArray(str) {
+var length = str.length;
+var array = [];
+for (var i = 0; i < length; ++i) {
+array[i] = str.charCodeAt(i);
+}
+return array;
+}
+function stringToBytes(str) {
+var length = str.length;
+var bytes = new Uint8Array(length);
+for (var i = 0; i < length; ++i) {
+bytes[i] = str.charCodeAt(i) & 0xFF;
+}
+return bytes;
+}
+function string32(value) {
+return String.fromCharCode((value >> 24) & 0xff, (value >> 16) & 0xff,
+(value >> 8) & 0xff, value & 0xff);
+}
+function log2(x) {
+var n = 1, i = 0;
+while (x > n) {
+n <<= 1;
+i++;
+}
+return i;
+}
+function readInt8(data, start) {
+return (data[start] << 24) >> 24;
+}
+function readUint16(data, offset) {
+return (data[offset] << 8) | data[offset + 1];
+}
+function readUint32(data, offset) {
+return ((data[offset] << 24) | (data[offset + 1] << 16) |
+(data[offset + 2] << 8) | data[offset + 3]) >>> 0;
+}
+// Lazy test the endianness of the platform
+// NOTE: This will be 'true' for simulated TypedArrays
+function isLittleEndian() {
+var buffer8 = new Uint8Array(2);
+buffer8[0] = 1;
+var buffer16 = new Uint16Array(buffer8.buffer);
+return (buffer16[0] === 1);
+}
+Object.defineProperty(PDFJS, 'isLittleEndian', {
+configurable: true,
+get: function PDFJS_isLittleEndian() {
+return shadow(PDFJS, 'isLittleEndian', isLittleEndian());
+}
+});
+PDFJS.hasCanvasTypedArrays = true;
+var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];
+var Util = PDFJS.Util = (function UtilClosure() {
+function Util() {}
+Util.makeCssRgb = function Util_makeCssRgb(rgb) {
+return 'rgb(' + rgb[0] + ',' + rgb[1] + ',' + rgb[2] + ')';
+};
+Util.makeCssCmyk = function Util_makeCssCmyk(cmyk) {
+var rgb = ColorSpace.singletons.cmyk.getRgb(cmyk, 0);
+return Util.makeCssRgb(rgb);
+};
+// Concatenates two transformation matrices together and returns the result.
+Util.transform = function Util_transform(m1, m2) {
+return [
+m1[0] * m2[0] + m1[2] * m2[1],
+m1[1] * m2[0] + m1[3] * m2[1],
+m1[0] * m2[2] + m1[2] * m2[3],
+m1[1] * m2[2] + m1[3] * m2[3],
+m1[0] * m2[4] + m1[2] * m2[5] + m1[4],
+m1[1] * m2[4] + m1[3] * m2[5] + m1[5]
+];
+};
+// For 2d affine transforms
+Util.applyTransform = function Util_applyTransform(p, m) {
+var xt = p[0] * m[0] + p[1] * m[2] + m[4];
+var yt = p[0] * m[1] + p[1] * m[3] + m[5];
+return [xt, yt];
+};
+Util.applyInverseTransform = function Util_applyInverseTransform(p, m) {
+var d = m[0] * m[3] - m[1] * m[2];
+var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;
+var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;
+return [xt, yt];
+};
+// Applies the transform to the rectangle and finds the minimum axially
+// aligned bounding box.
+Util.getAxialAlignedBoundingBox =
+function Util_getAxialAlignedBoundingBox(r, m) {
+var p1 = Util.applyTransform(r, m);
+var p2 = Util.applyTransform(r.slice(2, 4), m);
+var p3 = Util.applyTransform([r[0], r[3]], m);
+var p4 = Util.applyTransform([r[2], r[1]], m);
+return [
+Math.min(p1[0], p2[0], p3[0], p4[0]),
+Math.min(p1[1], p2[1], p3[1], p4[1]),
+Math.max(p1[0], p2[0], p3[0], p4[0]),
+Math.max(p1[1], p2[1], p3[1], p4[1])
+];
+};
+Util.inverseTransform = function Util_inverseTransform(m) {
+var d = m[0] * m[3] - m[1] * m[2];
+return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d,
+(m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d];
+};
+// Apply a generic 3d matrix M on a 3-vector v:
+//   | a b c |   | X |
+//   | d e f | x | Y |
+//   | g h i |   | Z |
+// M is assumed to be serialized as [a,b,c,d,e,f,g,h,i],
+// with v as [X,Y,Z]
+Util.apply3dTransform = function Util_apply3dTransform(m, v) {
+return [
+m[0] * v[0] + m[1] * v[1] + m[2] * v[2],
+m[3] * v[0] + m[4] * v[1] + m[5] * v[2],
+m[6] * v[0] + m[7] * v[1] + m[8] * v[2]
+];
+};
+// This calculation uses Singular Value Decomposition.
+// The SVD can be represented with formula A = USV. We are interested in the
+// matrix S here because it represents the scale values.
+Util.singularValueDecompose2dScale =
+function Util_singularValueDecompose2dScale(m) {
+var transpose = [m[0], m[2], m[1], m[3]];
+// Multiply matrix m with its transpose.
+var a = m[0] * transpose[0] + m[1] * transpose[2];
+var b = m[0] * transpose[1] + m[1] * transpose[3];
+var c = m[2] * transpose[0] + m[3] * transpose[2];
+var d = m[2] * transpose[1] + m[3] * transpose[3];
+// Solve the second degree polynomial to get roots.
+var first = (a + d) / 2;
+var second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2;
+var sx = first + second || 1;
+var sy = first - second || 1;
+// Scale values are the square roots of the eigenvalues.
+return [Math.sqrt(sx), Math.sqrt(sy)];
+};
+// Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2)
+// For coordinate systems whose origin lies in the bottom-left, this
+// means normalization to (BL,TR) ordering. For systems with origin in the
+// top-left, this means (TL,BR) ordering.
+Util.normalizeRect = function Util_normalizeRect(rect) {
+var r = rect.slice(0); // clone rect
+if (rect[0] > rect[2]) {
+r[0] = rect[2];
+r[2] = rect[0];
+}
+if (rect[1] > rect[3]) {
+r[1] = rect[3];
+r[3] = rect[1];
+}
+return r;
+};
+// Returns a rectangle [x1, y1, x2, y2] corresponding to the
+// intersection of rect1 and rect2. If no intersection, returns 'false'
+// The rectangle coordinates of rect1, rect2 should be [x1, y1, x2, y2]
+Util.intersect = function Util_intersect(rect1, rect2) {
+function compare(a, b) {
+return a - b;
+}
+// Order points along the axes
+var orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare),
+orderedY = [rect1[1], rect1[3], rect2[1], rect2[3]].sort(compare),
+result = [];
+rect1 = Util.normalizeRect(rect1);
+rect2 = Util.normalizeRect(rect2);
+// X: first and second points belong to different rectangles?
+if ((orderedX[0] === rect1[0] && orderedX[1] === rect2[0]) ||
+(orderedX[0] === rect2[0] && orderedX[1] === rect1[0])) {
+// Intersection must be between second and third points
+result[0] = orderedX[1];
+result[2] = orderedX[2];
+} else {
+return false;
+}
+// Y: first and second points belong to different rectangles?
+if ((orderedY[0] === rect1[1] && orderedY[1] === rect2[1]) ||
+(orderedY[0] === rect2[1] && orderedY[1] === rect1[1])) {
+// Intersection must be between second and third points
+result[1] = orderedY[1];
+result[3] = orderedY[2];
+} else {
+return false;
+}
+return result;
+};
+Util.sign = function Util_sign(num) {
+return num < 0 ? -1 : 1;
+};
+// TODO(mack): Rename appendToArray
+Util.concatenateToArray = function concatenateToArray(arr1, arr2) {
+Array.prototype.push.apply(arr1, arr2);
+};
+Util.prependToArray = function concatenateToArray(arr1, arr2) {
+Array.prototype.unshift.apply(arr1, arr2);
+};
+Util.extendObj = function extendObj(obj1, obj2) {
+for (var key in obj2) {
+obj1[key] = obj2[key];
+}
+};
+Util.getInheritableProperty = function Util_getInheritableProperty(dict,
+name) {
+while (dict && !dict.has(name)) {
+dict = dict.get('Parent');
+}
+if (!dict) {
+return null;
+}
+return dict.get(name);
+};
+Util.inherit = function Util_inherit(sub, base, prototype) {
+sub.prototype = Object.create(base.prototype);
+sub.prototype.constructor = sub;
+for (var prop in prototype) {
+sub.prototype[prop] = prototype[prop];
+}
+};
+Util.loadScript = function Util_loadScript(src, callback) {
+var script = document.createElement('script');
+var loaded = false;
+script.setAttribute('src', src);
+if (callback) {
+script.onload = function() {
+if (!loaded) {
+callback();
+}
+loaded = true;
+};
+}
+document.getElementsByTagName('head')[0].appendChild(script);
+};
+return Util;
+})();
+var PageViewport = PDFJS.PageViewport = (function PageViewportClosure() {
+function PageViewport(viewBox, scale, rotation, offsetX, offsetY, dontFlip) {
+this.viewBox = viewBox;
+this.scale = scale;
+this.rotation = rotation;
+this.offsetX = offsetX;
+this.offsetY = offsetY;
+// creating transform to convert pdf coordinate system to the normal
+// canvas like coordinates taking in account scale and rotation
+var centerX = (viewBox[2] + viewBox[0]) / 2;
+var centerY = (viewBox[3] + viewBox[1]) / 2;
+var rotateA, rotateB, rotateC, rotateD;
+rotation = rotation % 360;
+rotation = rotation < 0 ? rotation + 360 : rotation;
+switch (rotation) {
+case 180:
+rotateA = -1; rotateB = 0; rotateC = 0; rotateD = 1;
+break;
+case 90:
+rotateA = 0; rotateB = 1; rotateC = 1; rotateD = 0;
+break;
+case 270:
+rotateA = 0; rotateB = -1; rotateC = -1; rotateD = 0;
+break;
+//case 0:
+default:
+rotateA = 1; rotateB = 0; rotateC = 0; rotateD = -1;
+break;
+}
+if (dontFlip) {
+rotateC = -rotateC; rotateD = -rotateD;
+}
+var offsetCanvasX, offsetCanvasY;
+var width, height;
+if (rotateA === 0) {
+offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;
+offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;
+width = Math.abs(viewBox[3] - viewBox[1]) * scale;
+height = Math.abs(viewBox[2] - viewBox[0]) * scale;
+} else {
+offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX;
+offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY;
+width = Math.abs(viewBox[2] - viewBox[0]) * scale;
+height = Math.abs(viewBox[3] - viewBox[1]) * scale;
+}
+// creating transform for the following operations:
+// translate(-centerX, -centerY), rotate and flip vertically,
+// scale, and translate(offsetCanvasX, offsetCanvasY)
+this.transform = [
+rotateA * scale,
+rotateB * scale,
+rotateC * scale,
+rotateD * scale,
+offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY,
+offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY
+];
+this.width = width;
+this.height = height;
+this.fontScale = scale;
+}
+PageViewport.prototype = {
+clone: function PageViewPort_clone(args) {
+args = args || {};
+var scale = 'scale' in args ? args.scale : this.scale;
+var rotation = 'rotation' in args ? args.rotation : this.rotation;
+return new PageViewport(this.viewBox.slice(), scale, rotation,
+this.offsetX, this.offsetY, args.dontFlip);
+},
+convertToViewportPoint: function PageViewport_convertToViewportPoint(x, y) {
+return Util.applyTransform([x, y], this.transform);
+},
+convertToViewportRectangle:
+function PageViewport_convertToViewportRectangle(rect) {
+var tl = Util.applyTransform([rect[0], rect[1]], this.transform);
+var br = Util.applyTransform([rect[2], rect[3]], this.transform);
+return [tl[0], tl[1], br[0], br[1]];
+},
+convertToPdfPoint: function PageViewport_convertToPdfPoint(x, y) {
+return Util.applyInverseTransform([x, y], this.transform);
+}
+};
+return PageViewport;
+})();
+var PDFStringTranslateTable = [
+0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0,
+0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014,
+0x2013, 0x192, 0x2044, 0x2039, 0x203A, 0x2212, 0x2030, 0x201E, 0x201C,
+0x201D, 0x2018, 0x2019, 0x201A, 0x2122, 0xFB01, 0xFB02, 0x141, 0x152, 0x160,
+0x178, 0x17D, 0x131, 0x142, 0x153, 0x161, 0x17E, 0, 0x20AC
+];
+function stringToPDFString(str) {
+var i, n = str.length, strBuf = [];
+if (str[0] === '\xFE' && str[1] === '\xFF') {
+// UTF16BE BOM
+for (i = 2; i < n; i += 2) {
+strBuf.push(String.fromCharCode(
+(str.charCodeAt(i) << 8) | str.charCodeAt(i + 1)));
+}
+} else {
+for (i = 0; i < n; ++i) {
+var code = PDFStringTranslateTable[str.charCodeAt(i)];
+strBuf.push(code ? String.fromCharCode(code) : str.charAt(i));
+}
+}
+return strBuf.join('');
+}
+function stringToUTF8String(str) {
+return decodeURIComponent(escape(str));
+}
+function isEmptyObj(obj) {
+for (var key in obj) {
+return false;
+}
+return true;
+}
+function isBool(v) {
+return typeof v == 'boolean';
+}
+function isInt(v) {
+return typeof v == 'number' && ((v | 0) == v);
+}
+function isNum(v) {
+return typeof v == 'number';
+}
+function isString(v) {
+return typeof v == 'string';
+}
+function isNull(v) {
+return v === null;
+}
+function isName(v) {
+return v instanceof Name;
+}
+function isCmd(v, cmd) {
+return v instanceof Cmd && (!cmd || v.cmd == cmd);
+}
+function isDict(v, type) {
+if (!(v instanceof Dict)) {
+return false;
+}
+if (!type) {
+return true;
+}
+var dictType = v.get('Type');
+return isName(dictType) && dictType.name == type;
+}
+function isArray(v) {
+return v instanceof Array;
+}
+function isStream(v) {
+return typeof v == 'object' && v !== null && v !== undefined &&
+('getBytes' in v);
+}
+function isArrayBuffer(v) {
+return typeof v == 'object' && v !== null && v !== undefined &&
+('byteLength' in v);
+}
+function isRef(v) {
+return v instanceof Ref;
+}
+function isPDFFunction(v) {
+var fnDict;
+if (typeof v != 'object') {
+return false;
+} else if (isDict(v)) {
+fnDict = v;
+} else if (isStream(v)) {
+fnDict = v.dict;
+} else {
+return false;
+}
+return fnDict.has('FunctionType');
+}
+/**
+* Legacy support for PDFJS Promise implementation.
+* TODO remove eventually
+* @ignore
+*/
+var LegacyPromise = PDFJS.LegacyPromise = (function LegacyPromiseClosure() {
+return function LegacyPromise() {
+var resolve, reject;
+var promise = new Promise(function (resolve_, reject_) {
+resolve = resolve_;
+reject = reject_;
+});
+promise.resolve = resolve;
+promise.reject = reject;
+return promise;
+};
+})();
+/**
+* Polyfill for Promises:
+* The following promise implementation tries to generally implment the
+* Promise/A+ spec. Some notable differences from other promise libaries are:
+* - There currently isn't a seperate deferred and promise object.
+* - Unhandled rejections eventually show an error if they aren't handled.
+*
+* Based off of the work in:
+* https://bugzilla.mozilla.org/show_bug.cgi?id=810490
+*/
+(function PromiseClosure() {
+if (globalScope.Promise) {
+// Promises existing in the DOM/Worker, checking presence of all/resolve
+if (typeof globalScope.Promise.all !== 'function') {
+globalScope.Promise.all = function (iterable) {
+var count = 0, results = [], resolve, reject;
+var promise = new globalScope.Promise(function (resolve_, reject_) {
+resolve = resolve_;
+reject = reject_;
+});
+iterable.forEach(function (p, i) {
+count++;
+p.then(function (result) {
+results[i] = result;
+count--;
+if (count === 0) {
+resolve(results);
+}
+}, reject);
+});
+if (count === 0) {
+resolve(results);
+}
+return promise;
+};
+}
+if (typeof globalScope.Promise.resolve !== 'function') {
+globalScope.Promise.resolve = function (x) {
+return new globalScope.Promise(function (resolve) { resolve(x); });
+};
+}
+return;
+}
+throw new Error('DOM Promise is not present');
+})();
+var StatTimer = (function StatTimerClosure() {
+function rpad(str, pad, length) {
+while (str.length < length) {
+str += pad;
+}
+return str;
+}
+function StatTimer() {
+this.started = {};
+this.times = [];
+this.enabled = true;
+}
+StatTimer.prototype = {
+time: function StatTimer_time(name) {
+if (!this.enabled) {
+return;
+}
+if (name in this.started) {
+warn('Timer is already running for ' + name);
+}
+this.started[name] = Date.now();
+},
+timeEnd: function StatTimer_timeEnd(name) {
+if (!this.enabled) {
+return;
+}
+if (!(name in this.started)) {
+warn('Timer has not been started for ' + name);
+}
+this.times.push({
+'name': name,
+'start': this.started[name],
+'end': Date.now()
+});
+// Remove timer from started so it can be called again.
+delete this.started[name];
+},
+toString: function StatTimer_toString() {
+var i, ii;
+var times = this.times;
+var out = '';
+// Find the longest name for padding purposes.
+var longest = 0;
+for (i = 0, ii = times.length; i < ii; ++i) {
+var name = times[i]['name'];
+if (name.length > longest) {
+longest = name.length;
+}
+}
+for (i = 0, ii = times.length; i < ii; ++i) {
+var span = times[i];
+var duration = span.end - span.start;
+out += rpad(span['name'], ' ', longest) + ' ' + duration + 'ms\n';
+}
+return out;
+}
+};
+return StatTimer;
+})();
+PDFJS.createBlob = function createBlob(data, contentType) {
+if (typeof Blob !== 'undefined') {
+return new Blob([data], { type: contentType });
+}
+// Blob builder is deprecated in FF14 and removed in FF18.
+var bb = new MozBlobBuilder();
+bb.append(data);
+return bb.getBlob(contentType);
+};
+PDFJS.createObjectURL = (function createObjectURLClosure() {
+// Blob/createObjectURL is not available, falling back to data schema.
+var digits =
+'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+return function createObjectURL(data, contentType) {
+if (!PDFJS.disableCreateObjectURL &&
+typeof URL !== 'undefined' && URL.createObjectURL) {
+var blob = PDFJS.createBlob(data, contentType);
+return URL.createObjectURL(blob);
+}
+var buffer = 'data:' + contentType + ';base64,';
+for (var i = 0, ii = data.length; i < ii; i += 3) {
+var b1 = data[i] & 0xFF;
+var b2 = data[i + 1] & 0xFF;
+var b3 = data[i + 2] & 0xFF;
+var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4);
+var d3 = i + 1 < ii ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64;
+var d4 = i + 2 < ii ? (b3 & 0x3F) : 64;
+buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4];
+}
+return buffer;
+};
+})();
+function MessageHandler(name, comObj) {
+this.name = name;
+this.comObj = comObj;
+this.callbackIndex = 1;
+this.postMessageTransfers = true;
+var callbacks = this.callbacks = {};
+var ah = this.actionHandler = {};
+ah['console_log'] = [function ahConsoleLog(data) {
+console.log.apply(console, data);
+}];
+ah['console_error'] = [function ahConsoleError(data) {
+console.error.apply(console, data);
+}];
+ah['_unsupported_feature'] = [function ah_unsupportedFeature(data) {
+UnsupportedManager.notify(data);
+}];
+comObj.onmessage = function messageHandlerComObjOnMessage(event) {
+var data = event.data;
+if (data.isReply) {
+var callbackId = data.callbackId;
+if (data.callbackId in callbacks) {
+var callback = callbacks[callbackId];
+delete callbacks[callbackId];
+callback(data.data);
+} else {
+error('Cannot resolve callback ' + callbackId);
+}
+} else if (data.action in ah) {
+var action = ah[data.action];
+if (data.callbackId) {
+var deferred = {};
+var promise = new Promise(function (resolve, reject) {
+deferred.resolve = resolve;
+deferred.reject = reject;
+});
+deferred.promise = promise;
+promise.then(function(resolvedData) {
+comObj.postMessage({
+isReply: true,
+callbackId: data.callbackId,
+data: resolvedData
+});
+});
+action[0].call(action[1], data.data, deferred);
+} else {
+action[0].call(action[1], data.data);
+}
+} else {
+error('Unkown action from worker: ' + data.action);
+}
+};
+}
+MessageHandler.prototype = {
+on: function messageHandlerOn(actionName, handler, scope) {
+var ah = this.actionHandler;
+if (ah[actionName]) {
+error('There is already an actionName called "' + actionName + '"');
+}
+ah[actionName] = [handler, scope];
+},
+/**
+* Sends a message to the comObj to invoke the action with the supplied data.
+* @param {String} actionName Action to call.
+* @param {JSON} data JSON data to send.
+* @param {function} [callback] Optional callback that will handle a reply.
+* @param {Array} [transfers] Optional list of transfers/ArrayBuffers
+*/
+send: function messageHandlerSend(actionName, data, callback, transfers) {
+var message = {
+action: actionName,
+data: data
+};
+if (callback) {
+var callbackId = this.callbackIndex++;
+this.callbacks[callbackId] = callback;
+message.callbackId = callbackId;
+}
+if (transfers && this.postMessageTransfers) {
+this.comObj.postMessage(message, transfers);
+} else {
+this.comObj.postMessage(message);
+}
+}
+};
+function loadJpegStream(id, imageUrl, objs) {
+var img = new Image();
+img.onload = (function loadJpegStream_onloadClosure() {
+objs.resolve(id, img);
+});
+img.src = imageUrl;
+}
+var ColorSpace = (function ColorSpaceClosure() {
+// Constructor should define this.numComps, this.defaultColor, this.name
+function ColorSpace() {
+error('should not call ColorSpace constructor');
+}
+ColorSpace.prototype = {
+/**
+* Converts the color value to the RGB color. The color components are
+* located in the src array starting from the srcOffset. Returns the array
+* of the rgb components, each value ranging from [0,255].
+*/
+getRgb: function ColorSpace_getRgb(src, srcOffset) {
+var rgb = new Uint8Array(3);
+this.getRgbItem(src, srcOffset, rgb, 0);
+return rgb;
+},
+/**
+* Converts the color value to the RGB color, similar to the getRgb method.
+* The result placed into the dest array starting from the destOffset.
+*/
+getRgbItem: function ColorSpace_getRgbItem(src, srcOffset,
+dest, destOffset) {
+error('Should not call ColorSpace.getRgbItem');
+},
+/**
+* Converts the specified number of the color values to the RGB colors.
+* The colors are located in the src array starting from the srcOffset.
+* The result is placed into the dest array starting from the destOffset.
+* The src array items shall be in [0,2^bits) range, the dest array items
+* will be in [0,255] range. alpha01 indicates how many alpha components
+* there are in the dest array; it will be either 0 (RGB array) or 1 (RGBA
+* array).
+*/
+getRgbBuffer: function ColorSpace_getRgbBuffer(src, srcOffset, count,
+dest, destOffset, bits,
+alpha01) {
+error('Should not call ColorSpace.getRgbBuffer');
+},
+/**
+* Determines the number of bytes required to store the result of the
+* conversion done by the getRgbBuffer method. As in getRgbBuffer,
+* |alpha01| is either 0 (RGB output) or 1 (RGBA output).
+*/
+getOutputLength: function ColorSpace_getOutputLength(inputLength,
+alpha01) {
+error('Should not call ColorSpace.getOutputLength');
+},
+/**
+* Returns true if source data will be equal the result/output data.
+*/
+isPassthrough: function ColorSpace_isPassthrough(bits) {
+return false;
+},
+/**
+* Fills in the RGB colors in the destination buffer.  alpha01 indicates
+* how many alpha components there are in the dest array; it will be either
+* 0 (RGB array) or 1 (RGBA array).
+*/
+fillRgb: function ColorSpace_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;
+var i, ii;
+if (this.isPassthrough(bpc)) {
+rgbBuf = comps;
+} else if (this.numComps === 1 && count > numComponentColors &&
+this.name !== 'DeviceGray' && this.name !== 'DeviceRGB') {
+// Optimization: create a color map when there is just one component and
+// we are converting more colors than the size of the color map. We
+// don't build the map if the colorspace is gray or rgb since those
+// methods are faster than building a map. This mainly offers big speed
+// ups for indexed and alternate colorspaces.
+//
+// TODO it may be worth while to cache the color map. While running
+// testing I never hit a cache so I will leave that out for now (perhaps
+// we are reparsing colorspaces too much?).
+var allColors = bpc <= 8 ? new Uint8Array(numComponentColors) :
+new Uint16Array(numComponentColors);
+var key;
+for (i = 0; i < numComponentColors; i++) {
+allColors[i] = i;
+}
+var colorMap = new Uint8Array(numComponentColors * 3);
+this.getRgbBuffer(allColors, 0, numComponentColors, colorMap, 0, bpc,
+/* alpha01 = */ 0);
+var destPos, rgbPos;
+if (!needsResizing) {
+// Fill in the RGB values directly into |dest|.
+destPos = 0;
+for (i = 0; i < count; ++i) {
+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);
+rgbPos = 0;
+for (i = 0; i < count; ++i) {
+key = comps[i] * 3;
+rgbBuf[rgbPos++] = colorMap[key];
+rgbBuf[rgbPos++] = colorMap[key + 1];
+rgbBuf[rgbPos++] = colorMap[key + 2];
+}
+}
+} else {
+if (!needsResizing) {
+// Fill in the RGB values directly into |dest|.
+this.getRgbBuffer(comps, 0, width * actualHeight, dest, 0, bpc,
+alpha01);
+} else {
+rgbBuf = new Uint8Array(count * 3);
+this.getRgbBuffer(comps, 0, count, rgbBuf, 0, bpc,
+/* alpha01 = */ 0);
+}
+}
+if (rgbBuf) {
+if (needsResizing) {
+rgbBuf = PDFImage.resize(rgbBuf, bpc, 3, originalWidth,
+originalHeight, width, height);
+}
+rgbPos = 0;
+destPos = 0;
+for (i = 0, ii = width * actualHeight; i < ii; i++) {
+dest[destPos++] = rgbBuf[rgbPos++];
+dest[destPos++] = rgbBuf[rgbPos++];
+dest[destPos++] = rgbBuf[rgbPos++];
+destPos += alpha01;
+}
+}
+},
+/**
+* True if the colorspace has components in the default range of [0, 1].
+* This should be true for all colorspaces except for lab color spaces
+* which are [0,100], [-128, 127], [-128, 127].
+*/
+usesZeroToOneRange: true
+};
+ColorSpace.parse = function ColorSpace_parse(cs, xref, res) {
+var IR = ColorSpace.parseToIR(cs, xref, res);
+if (IR instanceof AlternateCS) {
+return IR;
+}
+return ColorSpace.fromIR(IR);
+};
+ColorSpace.fromIR = function ColorSpace_fromIR(IR) {
+var name = isArray(IR) ? IR[0] : IR;
+var whitePoint, blackPoint;
+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].WhitePoint;
+blackPoint = IR[1].BlackPoint;
+var gamma = IR[1].Gamma;
+return new CalGrayCS(whitePoint, blackPoint, gamma);
+case 'PatternCS':
+var basePatternCS = IR[1];
+if (basePatternCS) {
+basePatternCS = ColorSpace.fromIR(basePatternCS);
+}
+return new PatternCS(basePatternCS);
+case 'IndexedCS':
+var baseIndexedCS = IR[1];
+var hiVal = IR[2];
+var lookup = IR[3];
+return new IndexedCS(ColorSpace.fromIR(baseIndexedCS), hiVal, lookup);
+case 'AlternateCS':
+var numComps = IR[1];
+var alt = IR[2];
+var tintFnIR = IR[3];
+return new AlternateCS(numComps, ColorSpace.fromIR(alt),
+PDFFunction.fromIR(tintFnIR));
+case 'LabCS':
+whitePoint = IR[1].WhitePoint;
+blackPoint = IR[1].BlackPoint;
+var range = IR[1].Range;
+return new LabCS(whitePoint, blackPoint, range);
+default:
+error('Unkown name ' + name);
+}
+return null;
+};
+ColorSpace.parseToIR = function ColorSpace_parseToIR(cs, xref, res) {
+if (isName(cs)) {
+var colorSpaces = res.get('ColorSpace');
+if (isDict(colorSpaces)) {
+var refcs = colorSpaces.get(cs.name);
+if (refcs) {
+cs = refcs;
+}
+}
+}
+cs = xref.fetchIfRef(cs);
+var mode;
+if (isName(cs)) {
+mode = cs.name;
+this.mode = mode;
+switch (mode) {
+case 'DeviceGray':
+case 'G':
+return 'DeviceGrayCS';
+case 'DeviceRGB':
+case 'RGB':
+return 'DeviceRgbCS';
+case 'DeviceCMYK':
+case 'CMYK':
+return 'DeviceCmykCS';
+case 'Pattern':
+return ['PatternCS', null];
+default:
+error('unrecognized colorspace ' + mode);
+}
+} else if (isArray(cs)) {
+mode = cs[0].name;
+this.mode = mode;
+var numComps, params;
+switch (mode) {
+case 'DeviceGray':
+case 'G':
+return 'DeviceGrayCS';
+case 'DeviceRGB':
+case 'RGB':
+return 'DeviceRgbCS';
+case 'DeviceCMYK':
+case 'CMYK':
+return 'DeviceCmykCS';
+case 'CalGray':
+params = cs[1].getAll();
+return ['CalGrayCS', params];
+case 'CalRGB':
+return 'DeviceRgbCS';
+case 'ICCBased':
+var stream = xref.fetchIfRef(cs[1]);
+var dict = stream.dict;
+numComps = dict.get('N');
+if (numComps == 1) {
+return 'DeviceGrayCS';
+} else if (numComps == 3) {
+return 'DeviceRgbCS';
+} else if (numComps == 4) {
+return 'DeviceCmykCS';
+}
+break;
+case 'Pattern':
+var basePatternCS = cs[1];
+if (basePatternCS) {
+basePatternCS = ColorSpace.parseToIR(basePatternCS, xref, res);
+}
+return ['PatternCS', basePatternCS];
+case 'Indexed':
+case 'I':
+var baseIndexedCS = ColorSpace.parseToIR(cs[1], xref, res);
+var hiVal = cs[2] + 1;
+var lookup = xref.fetchIfRef(cs[3]);
+if (isStream(lookup)) {
+lookup = lookup.getBytes();
+}
+return ['IndexedCS', baseIndexedCS, hiVal, lookup];
+case 'Separation':
+case 'DeviceN':
+var name = cs[1];
+numComps = 1;
+if (isName(name)) {
+numComps = 1;
+} else if (isArray(name)) {
+numComps = name.length;
+}
+var alt = ColorSpace.parseToIR(cs[2], xref, res);
+var tintFnIR = PDFFunction.getIR(xref, xref.fetchIfRef(cs[3]));
+return ['AlternateCS', numComps, alt, tintFnIR];
+case 'Lab':
+params = cs[1].getAll();
+return ['LabCS', params];
+default:
+error('unimplemented color space object "' + mode + '"');
+}
+} else {
+error('unrecognized color space object: "' + cs + '"');
+}
+return null;
+};
+/**
+* Checks if a decode map matches the default decode map for a color space.
+* This handles the general decode maps where there are two values per
+* component. e.g. [0, 1, 0, 1, 0, 1] for a RGB color.
+* This does not handle Lab, Indexed, or Pattern decode maps since they are
+* slightly different.
+* @param {Array} decode Decode map (usually from an image).
+* @param {Number} n Number of components the color space has.
+*/
+ColorSpace.isDefaultDecode = function ColorSpace_isDefaultDecode(decode, n) {
+if (!decode) {
+return true;
+}
+if (n * 2 !== decode.length) {
+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;
+};
+ColorSpace.singletons = {
+get gray() {
+return shadow(this, 'gray', new DeviceGrayCS());
+},
+get rgb() {
+return shadow(this, 'rgb', new DeviceRgbCS());
+},
+get cmyk() {
+return shadow(this, 'cmyk', new DeviceCmykCS());
+}
+};
+return ColorSpace;
+})();
+/**
+* Alternate color space handles both Separation and DeviceN color spaces.  A
+* Separation color space is actually just a DeviceN with one color component.
+* Both color spaces use a tinting function to convert colors to a base color
+* space.
+*/
+var AlternateCS = (function AlternateCSClosure() {
+function AlternateCS(numComps, base, tintFn) {
+this.name = 'Alternate';
+this.numComps = numComps;
+this.defaultColor = new Float32Array(numComps);
+for (var i = 0; i < numComps; ++i) {
+this.defaultColor[i] = 1;
+}
+this.base = base;
+this.tintFn = tintFn;
+}
+AlternateCS.prototype = {
+getRgb: ColorSpace.prototype.getRgb,
+getRgbItem: function AlternateCS_getRgbItem(src, srcOffset,
+dest, destOffset) {
+var baseNumComps = this.base.numComps;
+var input = 'subarray' in src ?
+src.subarray(srcOffset, srcOffset + this.numComps) :
+Array.prototype.slice.call(src, srcOffset, srcOffset + this.numComps);
+var tinted = this.tintFn(input);
+this.base.getRgbItem(tinted, 0, dest, destOffset);
+},
+getRgbBuffer: function AlternateCS_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 Uint8Array(baseNumComps * count);
+var numComps = this.numComps;
+var scaled = new Float32Array(numComps);
+var i, j;
+for (i = 0; i < count; i++) {
+for (j = 0; j < numComps; j++) {
+scaled[j] = src[srcOffset++] * scale;
+}
+var tinted = tintFn(scaled);
+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: function AlternateCS_getOutputLength(inputLength,
+alpha01) {
+return this.base.getOutputLength(inputLength *
+this.base.numComps / this.numComps,
+alpha01);
+},
+isPassthrough: ColorSpace.prototype.isPassthrough,
+fillRgb: ColorSpace.prototype.fillRgb,
+isDefaultDecode: function AlternateCS_isDefaultDecode(decodeMap) {
+return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
+},
+usesZeroToOneRange: true
+};
+return AlternateCS;
+})();
+var PatternCS = (function PatternCSClosure() {
+function PatternCS(baseCS) {
+this.name = 'Pattern';
+this.base = baseCS;
+}
+PatternCS.prototype = {};
+return PatternCS;
+})();
+var IndexedCS = (function IndexedCSClosure() {
+function IndexedCS(base, highVal, lookup) {
+this.name = 'Indexed';
+this.numComps = 1;
+this.defaultColor = new Uint8Array([0]);
+this.base = base;
+this.highVal = highVal;
+var baseNumComps = base.numComps;
+var length = baseNumComps * highVal;
+var lookupArray;
+if (isStream(lookup)) {
+lookupArray = new Uint8Array(length);
+var bytes = lookup.getBytes(length);
+lookupArray.set(bytes);
+} else if (isString(lookup)) {
+lookupArray = new Uint8Array(length);
+for (var i = 0; i < length; ++i) {
+lookupArray[i] = lookup.charCodeAt(i);
+}
+} else if (lookup instanceof Uint8Array || lookup instanceof Array) {
+lookupArray = lookup;
+} else {
+error('Unrecognized lookup table: ' + lookup);
+}
+this.lookup = lookupArray;
+}
+IndexedCS.prototype = {
+getRgb: ColorSpace.prototype.getRgb,
+getRgbItem: function IndexedCS_getRgbItem(src, srcOffset,
+dest, destOffset) {
+var numComps = this.base.numComps;
+var start = src[srcOffset] * numComps;
+this.base.getRgbItem(this.lookup, start, dest, destOffset);
+},
+getRgbBuffer: function IndexedCS_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;
+}
+},
+getOutputLength: function IndexedCS_getOutputLength(inputLength, alpha01) {
+return this.base.getOutputLength(inputLength * this.base.numComps,
+alpha01);
+},
+isPassthrough: ColorSpace.prototype.isPassthrough,
+fillRgb: ColorSpace.prototype.fillRgb,
+isDefaultDecode: function IndexedCS_isDefaultDecode(decodeMap) {
+// indexed color maps shouldn't be changed
+return true;
+},
+usesZeroToOneRange: true
+};
+return IndexedCS;
+})();
+var DeviceGrayCS = (function DeviceGrayCSClosure() {
+function DeviceGrayCS() {
+this.name = 'DeviceGray';
+this.numComps = 1;
+this.defaultColor = new Float32Array([0]);
+}
+DeviceGrayCS.prototype = {
+getRgb: ColorSpace.prototype.getRgb,
+getRgbItem: function DeviceGrayCS_getRgbItem(src, srcOffset,
+dest, destOffset) {
+var c = (src[srcOffset] * 255) | 0;
+c = c < 0 ? 0 : c > 255 ? 255 : c;
+dest[destOffset] = dest[destOffset + 1] = dest[destOffset + 2] = c;
+},
+getRgbBuffer: function DeviceGrayCS_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++]) | 0;
+dest[q++] = c;
+dest[q++] = c;
+dest[q++] = c;
+q += alpha01;
+}
+},
+getOutputLength: function DeviceGrayCS_getOutputLength(inputLength,
+alpha01) {
+return inputLength * (3 + alpha01);
+},
+isPassthrough: ColorSpace.prototype.isPassthrough,
+fillRgb: ColorSpace.prototype.fillRgb,
+isDefaultDecode: function DeviceGrayCS_isDefaultDecode(decodeMap) {
+return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
+},
+usesZeroToOneRange: true
+};
+return DeviceGrayCS;
+})();
+var DeviceRgbCS = (function DeviceRgbCSClosure() {
+function DeviceRgbCS() {
+this.name = 'DeviceRGB';
+this.numComps = 3;
+this.defaultColor = new Float32Array([0, 0, 0]);
+}
+DeviceRgbCS.prototype = {
+getRgb: ColorSpace.prototype.getRgb,
+getRgbItem: function DeviceRgbCS_getRgbItem(src, srcOffset,
+dest, destOffset) {
+var r = (src[srcOffset] * 255) | 0;
+var g = (src[srcOffset + 1] * 255) | 0;
+var b = (src[srcOffset + 2] * 255) | 0;
+dest[destOffset] = r < 0 ? 0 : r > 255 ? 255 : r;
+dest[destOffset + 1] = g < 0 ? 0 : g > 255 ? 255 : g;
+dest[destOffset + 2] = b < 0 ? 0 : b > 255 ? 255 : b;
+},
+getRgbBuffer: function DeviceRgbCS_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++]) | 0;
+dest[q++] = (scale * src[j++]) | 0;
+dest[q++] = (scale * src[j++]) | 0;
+q += alpha01;
+}
+},
+getOutputLength: function DeviceRgbCS_getOutputLength(inputLength,
+alpha01) {
+return (inputLength * (3 + alpha01) / 3) | 0;
+},
+isPassthrough: function DeviceRgbCS_isPassthrough(bits) {
+return bits == 8;
+},
+fillRgb: ColorSpace.prototype.fillRgb,
+isDefaultDecode: function DeviceRgbCS_isDefaultDecode(decodeMap) {
+return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
+},
+usesZeroToOneRange: true
+};
+return DeviceRgbCS;
+})();
+var DeviceCmykCS = (function DeviceCmykCSClosure() {
+// The coefficients below was found using numerical analysis: the method of
+// steepest descent for the sum((f_i - color_value_i)^2) for r/g/b colors,
+// where color_value is the tabular value from the table of sampled RGB colors
+// from CMYK US Web Coated (SWOP) colorspace, and f_i is the corresponding
+// CMYK color conversion using the estimation below:
+//   f(A, B,.. N) = Acc+Bcm+Ccy+Dck+c+Fmm+Gmy+Hmk+Im+Jyy+Kyk+Ly+Mkk+Nk+255
+function convertToRgb(src, srcOffset, srcScale, dest, destOffset) {
+var c = src[srcOffset + 0] * srcScale;
+var m = src[srcOffset + 1] * srcScale;
+var y = src[srcOffset + 2] * srcScale;
+var k = src[srcOffset + 3] * srcScale;
+var r =
+(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) + 255) | 0;
+var g =
+(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) + 255) | 0;
+var b =
+(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) + 255) | 0;
+dest[destOffset] = r > 255 ? 255 : r < 0 ? 0 : r;
+dest[destOffset + 1] = g > 255 ? 255 : g < 0 ? 0 : g;
+dest[destOffset + 2] = b > 255 ? 255 : b < 0 ? 0 : b;
+}
+function DeviceCmykCS() {
+this.name = 'DeviceCMYK';
+this.numComps = 4;
+this.defaultColor = new Float32Array([0, 0, 0, 1]);
+}
+DeviceCmykCS.prototype = {
+getRgb: ColorSpace.prototype.getRgb,
+getRgbItem: function DeviceCmykCS_getRgbItem(src, srcOffset,
+dest, destOffset) {
+convertToRgb(src, srcOffset, 1, dest, destOffset);
+},
+getRgbBuffer: function DeviceCmykCS_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;
+}
+},
+getOutputLength: function DeviceCmykCS_getOutputLength(inputLength,
+alpha01) {
+return (inputLength / 4 * (3 + alpha01)) | 0;
+},
+isPassthrough: ColorSpace.prototype.isPassthrough,
+fillRgb: ColorSpace.prototype.fillRgb,
+isDefaultDecode: function DeviceCmykCS_isDefaultDecode(decodeMap) {
+return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
+},
+usesZeroToOneRange: true
+};
+return DeviceCmykCS;
+})();
+//
+// CalGrayCS: Based on "PDF Reference, Sixth Ed", p.245
+//
+var CalGrayCS = (function CalGrayCSClosure() {
+function CalGrayCS(whitePoint, blackPoint, gamma) {
+this.name = 'CalGray';
+this.numComps = 1;
+this.defaultColor = new Float32Array([0]);
+if (!whitePoint) {
+error('WhitePoint missing - required for color space CalGray');
+}
+blackPoint = blackPoint || [0, 0, 0];
+gamma = gamma || 1;
+// Translate arguments to spec variables.
+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;
+// Validate variables as per spec.
+if (this.XW < 0 || this.ZW < 0 || this.YW !== 1) {
+error('Invalid WhitePoint components for ' + this.name +
+', no fallback available');
+}
+if (this.XB < 0 || this.YB < 0 || this.ZB < 0) {
+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) {
+warn(this.name + ', BlackPoint: XB: ' + this.XB + ', YB: ' + this.YB +
+', ZB: ' + this.ZB + ', only default values are supported.');
+}
+if (this.G < 1) {
+info('Invalid Gamma: ' + this.G + ' for ' + this.name +
+', falling back to default');
+this.G = 1;
+}
+}
+function convertToRgb(cs, src, srcOffset, dest, destOffset, scale) {
+// A represents a gray component of a calibrated gray space.
+// A <---> AG in the spec
+var A = src[srcOffset] * scale;
+var AG = Math.pow(A, cs.G);
+// Computes intermediate variables M, L, N as per spec.
+// Except if other than default BlackPoint values are used.
+var M = cs.XW * AG;
+var L = cs.YW * AG;
+var N = cs.ZW * AG;
+// Decode XYZ, as per spec.
+var X = M;
+var Y = L;
+var Z = N;
+// http://www.poynton.com/notes/colour_and_gamma/ColorFAQ.html, Ch 4.
+// This yields values in range [0, 100].
+var Lstar = Math.max(116 * Math.pow(Y, 1 / 3) - 16, 0);
+// Convert values to rgb range [0, 255].
+dest[destOffset] = Lstar * 255 / 100;
+dest[destOffset + 1] = Lstar * 255 / 100;
+dest[destOffset + 2] = Lstar * 255 / 100;
+}
+CalGrayCS.prototype = {
+getRgb: ColorSpace.prototype.getRgb,
+getRgbItem: function CalGrayCS_getRgbItem(src, srcOffset,
+dest, destOffset) {
+convertToRgb(this, src, srcOffset, dest, destOffset, 1);
+},
+getRgbBuffer: function CalGrayCS_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;
+}
+},
+getOutputLength: function CalGrayCS_getOutputLength(inputLength, alpha01) {
+return inputLength * (3 + alpha01);
+},
+isPassthrough: ColorSpace.prototype.isPassthrough,
+fillRgb: ColorSpace.prototype.fillRgb,
+isDefaultDecode: function CalGrayCS_isDefaultDecode(decodeMap) {
+return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
+},
+usesZeroToOneRange: true
+};
+return CalGrayCS;
+})();
+//
+// LabCS: Based on "PDF Reference, Sixth Ed", p.250
+//
+var LabCS = (function LabCSClosure() {
+function LabCS(whitePoint, blackPoint, range) {
+this.name = 'Lab';
+this.numComps = 3;
+this.defaultColor = new Float32Array([0, 0, 0]);
+if (!whitePoint) {
+error('WhitePoint missing - required for color space Lab');
+}
+blackPoint = blackPoint || [0, 0, 0];
+range = range || [-100, 100, -100, 100];
+// Translate args to spec variables
+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];
+// These are here just for completeness - the spec doesn't offer any
+// formulas that use BlackPoint in Lab
+this.XB = blackPoint[0];
+this.YB = blackPoint[1];
+this.ZB = blackPoint[2];
+// Validate vars as per spec
+if (this.XW < 0 || this.ZW < 0 || this.YW !== 1) {
+error('Invalid WhitePoint components, no fallback available');
+}
+if (this.XB < 0 || this.YB < 0 || this.ZB < 0) {
+info('Invalid BlackPoint, falling back to default');
+this.XB = this.YB = this.ZB = 0;
+}
+if (this.amin > this.amax || this.bmin > this.bmax) {
+info('Invalid Range, falling back to defaults');
+this.amin = -100;
+this.amax = 100;
+this.bmin = -100;
+this.bmax = 100;
+}
+}
+// Function g(x) from spec
+function fn_g(x) {
+if (x >= 6 / 29) {
+return x * x * x;
+} else {
+return (108 / 841) * (x - 4 / 29);
+}
+}
+function decode(value, high1, low2, high2) {
+return low2 + (value) * (high2 - low2) / (high1);
+}
+// If decoding is needed maxVal should be 2^bits per component - 1.
+function convertToRgb(cs, src, srcOffset, maxVal, dest, destOffset) {
+// XXX: Lab input is in the range of [0, 100], [amin, amax], [bmin, bmax]
+// not the usual [0, 1]. If a command like setFillColor is used the src
+// values will already be within the correct range. However, if we are
+// converting an image we have to map the values to the correct range given
+// above.
+// Ls,as,bs <---> L*,a*,b* in the spec
+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);
+}
+// Adjust limits of 'as' and 'bs'
+as = as > cs.amax ? cs.amax : as < cs.amin ? cs.amin : as;
+bs = bs > cs.bmax ? cs.bmax : bs < cs.bmin ? cs.bmin : bs;
+// Computes intermediate variables X,Y,Z as per spec
+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, g, b;
+// Using different conversions for D50 and D65 white points,
+// per http://www.color.org/srgb.pdf
+if (cs.ZW < 1) {
+// Assuming D50 (X=0.9642, Y=1.00, Z=0.8249)
+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 {
+// Assuming D65 (X=0.9505, Y=1.00, Z=1.0888)
+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;
+}
+// clamp color values to [0,1] range then convert to [0,255] range.
+dest[destOffset] = r <= 0 ? 0 : r >= 1 ? 255 : Math.sqrt(r) * 255 | 0;
+dest[destOffset + 1] = g <= 0 ? 0 : g >= 1 ? 255 : Math.sqrt(g) * 255 | 0;
+dest[destOffset + 2] = b <= 0 ? 0 : b >= 1 ? 255 : Math.sqrt(b) * 255 | 0;
+}
+LabCS.prototype = {
+getRgb: ColorSpace.prototype.getRgb,
+getRgbItem: function LabCS_getRgbItem(src, srcOffset, dest, destOffset) {
+convertToRgb(this, src, srcOffset, false, dest, destOffset);
+},
+getRgbBuffer: function LabCS_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;
+}
+},
+getOutputLength: function LabCS_getOutputLength(inputLength, alpha01) {
+return (inputLength * (3 + alpha01) / 3) | 0;
+},
+isPassthrough: ColorSpace.prototype.isPassthrough,
+isDefaultDecode: function LabCS_isDefaultDecode(decodeMap) {
+// XXX: Decoding is handled with the lab conversion because of the strange
+// ranges that are used.
+return true;
+},
+usesZeroToOneRange: false
+};
+return LabCS;
+})();
+var PDFFunction = (function PDFFunctionClosure() {
+var CONSTRUCT_SAMPLED = 0;
+var CONSTRUCT_INTERPOLATED = 2;
+var CONSTRUCT_STICHED = 3;
+var CONSTRUCT_POSTSCRIPT = 4;
+return {
+getSampleArray: function PDFFunction_getSampleArray(size, outputSize, bps,
+str) {
+var i, ii;
+var length = 1;
+for (i = 0, ii = size.length; i < ii; i++) {
+length *= size[i];
+}
+length *= outputSize;
+var array = [];
+var codeSize = 0;
+var codeBuf = 0;
+// 32 is a valid bps so shifting won't work
+var sampleMul = 1.0 / (Math.pow(2.0, bps) - 1);
+var strBytes = str.getBytes((length * bps + 7) / 8);
+var strIdx = 0;
+for (i = 0; i < length; i++) {
+while (codeSize < bps) {
+codeBuf <<= 8;
+codeBuf |= strBytes[strIdx++];
+codeSize += 8;
+}
+codeSize -= bps;
+array.push((codeBuf >> codeSize) * sampleMul);
+codeBuf &= (1 << codeSize) - 1;
+}
+return array;
+},
+getIR: function PDFFunction_getIR(xref, fn) {
+var dict = fn.dict;
+if (!dict) {
+dict = fn;
+}
+var types = [this.constructSampled,
+null,
+this.constructInterpolated,
+this.constructStiched,
+this.constructPostScript];
+var typeNum = dict.get('FunctionType');
+var typeFn = types[typeNum];
+if (!typeFn) {
+error('Unknown type of function');
+}
+return typeFn.call(this, fn, dict, xref);
+},
+fromIR: function PDFFunction_fromIR(IR) {
+var type = IR[0];
+switch (type) {
+case CONSTRUCT_SAMPLED:
+return this.constructSampledFromIR(IR);
+case CONSTRUCT_INTERPOLATED:
+return this.constructInterpolatedFromIR(IR);
+case CONSTRUCT_STICHED:
+return this.constructStichedFromIR(IR);
+//case CONSTRUCT_POSTSCRIPT:
+default:
+return this.constructPostScriptFromIR(IR);
+}
+},
+parse: function PDFFunction_parse(xref, fn) {
+var IR = this.getIR(xref, fn);
+return this.fromIR(IR);
+},
+constructSampled: function PDFFunction_constructSampled(str, dict) {
+function toMultiArray(arr) {
+var inputLength = arr.length;
+var out = [];
+var index = 0;
+for (var i = 0; i < inputLength; i += 2) {
+out[index] = [arr[i], arr[i + 1]];
+++index;
+}
+return out;
+}
+var domain = dict.get('Domain');
+var range = dict.get('Range');
+if (!domain || !range) {
+error('No domain or range');
+}
+var inputSize = domain.length / 2;
+var outputSize = range.length / 2;
+domain = toMultiArray(domain);
+range = toMultiArray(range);
+var size = dict.get('Size');
+var bps = dict.get('BitsPerSample');
+var order = dict.get('Order') || 1;
+if (order !== 1) {
+// No description how cubic spline interpolation works in PDF32000:2008
+// As in poppler, ignoring order, linear interpolation may work as good
+info('No support for cubic spline interpolation: ' + order);
+}
+var encode = dict.get('Encode');
+if (!encode) {
+encode = [];
+for (var i = 0; i < inputSize; ++i) {
+encode.push(0);
+encode.push(size[i] - 1);
+}
+}
+encode = toMultiArray(encode);
+var decode = dict.get('Decode');
+if (!decode) {
+decode = range;
+} else {
+decode = toMultiArray(decode);
+}
+var samples = this.getSampleArray(size, outputSize, bps, str);
+return [
+CONSTRUCT_SAMPLED, inputSize, domain, encode, decode, samples, size,
+outputSize, Math.pow(2, bps) - 1, range
+];
+},
+constructSampledFromIR: function PDFFunction_constructSampledFromIR(IR) {
+// See chapter 3, page 109 of the PDF reference
+function interpolate(x, xmin, xmax, ymin, ymax) {
+return ymin + ((x - xmin) * ((ymax - ymin) / (xmax - xmin)));
+}
+return function constructSampledFromIRResult(args) {
+// See chapter 3, page 110 of the PDF reference.
+var m = IR[1];
+var domain = IR[2];
+var encode = IR[3];
+var decode = IR[4];
+var samples = IR[5];
+var size = IR[6];
+var n = IR[7];
+//var mask = IR[8];
+var range = IR[9];
+if (m != args.length) {
+error('Incorrect number of arguments: ' + m + ' != ' +
+args.length);
+}
+var x = args;
+// Building the cube vertices: its part and sample index
+// http://rjwagner49.com/Mathematics/Interpolation.pdf
+var cubeVertices = 1 << m;
+var cubeN = new Float64Array(cubeVertices);
+var cubeVertex = new Uint32Array(cubeVertices);
+var i, j;
+for (j = 0; j < cubeVertices; j++) {
+cubeN[j] = 1;
+}
+var k = n, pos = 1;
+// Map x_i to y_j for 0 <= i < m using the sampled function.
+for (i = 0; i < m; ++i) {
+// x_i' = min(max(x_i, Domain_2i), Domain_2i+1)
+var domain_2i = domain[i][0];
+var domain_2i_1 = domain[i][1];
+var xi = Math.min(Math.max(x[i], domain_2i), domain_2i_1);
+// e_i = Interpolate(x_i', Domain_2i, Domain_2i+1,
+//                   Encode_2i, Encode_2i+1)
+var e = interpolate(xi, domain_2i, domain_2i_1,
+encode[i][0], encode[i][1]);
+// e_i' = min(max(e_i, 0), Size_i - 1)
+var size_i = size[i];
+e = Math.min(Math.max(e, 0), size_i - 1);
+// Adjusting the cube: N and vertex sample index
+var e0 = e < size_i - 1 ? Math.floor(e) : e - 1; // e1 = e0 + 1;
+var n0 = e0 + 1 - e; // (e1 - e) / (e1 - e0);
+var n1 = e - e0; // (e - e0) / (e1 - e0);
+var offset0 = e0 * k;
+var offset1 = offset0 + k; // e1 * k
+for (j = 0; j < cubeVertices; j++) {
+if (j & pos) {
+cubeN[j] *= n1;
+cubeVertex[j] += offset1;
+} else {
+cubeN[j] *= n0;
+cubeVertex[j] += offset0;
+}
+}
+k *= size_i;
+pos <<= 1;
+}
+var y = new Float64Array(n);
+for (j = 0; j < n; ++j) {
+// Sum all cube vertices' samples portions
+var rj = 0;
+for (i = 0; i < cubeVertices; i++) {
+rj += samples[cubeVertex[i] + j] * cubeN[i];
+}
+// r_j' = Interpolate(r_j, 0, 2^BitsPerSample - 1,
+//                    Decode_2j, Decode_2j+1)
+rj = interpolate(rj, 0, 1, decode[j][0], decode[j][1]);
+// y_j = min(max(r_j, range_2j), range_2j+1)
+y[j] = Math.min(Math.max(rj, range[j][0]), range[j][1]);
+}
+return y;
+};
+},
+constructInterpolated: function PDFFunction_constructInterpolated(str,
+dict) {
+var c0 = dict.get('C0') || [0];
+var c1 = dict.get('C1') || [1];
+var n = dict.get('N');
+if (!isArray(c0) || !isArray(c1)) {
+error('Illegal dictionary for interpolated function');
+}
+var length = c0.length;
+var diff = [];
+for (var i = 0; i < length; ++i) {
+diff.push(c1[i] - c0[i]);
+}
+return [CONSTRUCT_INTERPOLATED, c0, diff, n];
+},
+constructInterpolatedFromIR:
+function PDFFunction_constructInterpolatedFromIR(IR) {
+var c0 = IR[1];
+var diff = IR[2];
+var n = IR[3];
+var length = diff.length;
+return function constructInterpolatedFromIRResult(args) {
+var x = n == 1 ? args[0] : Math.pow(args[0], n);
+var out = [];
+for (var j = 0; j < length; ++j) {
+out.push(c0[j] + (x * diff[j]));
+}
+return out;
+};
+},
+constructStiched: function PDFFunction_constructStiched(fn, dict, xref) {
+var domain = dict.get('Domain');
+if (!domain) {
+error('No domain');
+}
+var inputSize = domain.length / 2;
+if (inputSize != 1) {
+error('Bad domain for stiched function');
+}
+var fnRefs = dict.get('Functions');
+var fns = [];
+for (var i = 0, ii = fnRefs.length; i < ii; ++i) {
+fns.push(PDFFunction.getIR(xref, xref.fetchIfRef(fnRefs[i])));
+}
+var bounds = dict.get('Bounds');
+var encode = dict.get('Encode');
+return [CONSTRUCT_STICHED, domain, bounds, encode, fns];
+},
+constructStichedFromIR: function PDFFunction_constructStichedFromIR(IR) {
+var domain = IR[1];
+var bounds = IR[2];
+var encode = IR[3];
+var fnsIR = IR[4];
+var fns = [];
+for (var i = 0, ii = fnsIR.length; i < ii; i++) {
+fns.push(PDFFunction.fromIR(fnsIR[i]));
+}
+return function constructStichedFromIRResult(args) {
+var clip = function constructStichedFromIRClip(v, min, max) {
+if (v > max) {
+v = max;
+} else if (v < min) {
+v = min;
+}
+return v;
+};
+// clip to domain
+var v = clip(args[0], domain[0], domain[1]);
+// calulate which bound the value is in
+for (var i = 0, ii = bounds.length; i < ii; ++i) {
+if (v < bounds[i]) {
+break;
+}
+}
+// encode value into domain of function
+var dmin = domain[0];
+if (i > 0) {
+dmin = bounds[i - 1];
+}
+var dmax = domain[1];
+if (i < bounds.length) {
+dmax = bounds[i];
+}
+var rmin = encode[2 * i];
+var rmax = encode[2 * i + 1];
+var v2 = rmin + (v - dmin) * (rmax - rmin) / (dmax - dmin);
+// call the appropriate function
+return fns[i]([v2]);
+};
+},
+constructPostScript: function PDFFunction_constructPostScript(fn, dict,
+xref) {
+var domain = dict.get('Domain');
+var range = dict.get('Range');
+if (!domain) {
+error('No domain.');
+}
+if (!range) {
+error('No range.');
+}
+var lexer = new PostScriptLexer(fn);
+var parser = new PostScriptParser(lexer);
+var code = parser.parse();
+return [CONSTRUCT_POSTSCRIPT, domain, range, code];
+},
+constructPostScriptFromIR: function PDFFunction_constructPostScriptFromIR(
+IR) {
+var domain = IR[1];
+var range = IR[2];
+var code = IR[3];
+var numOutputs = range.length / 2;
+var evaluator = new PostScriptEvaluator(code);
+// Cache the values for a big speed up, the cache size is limited though
+// since the number of possible values can be huge from a PS function.
+var cache = new FunctionCache();
+return function constructPostScriptFromIRResult(args) {
+var initialStack = [];
+for (var i = 0, ii = (domain.length / 2); i < ii; ++i) {
+initialStack.push(args[i]);
+}
+var key = initialStack.join('_');
+if (cache.has(key)) {
+return cache.get(key);
+}
+var stack = evaluator.execute(initialStack);
+var transformed = [];
+for (i = numOutputs - 1; i >= 0; --i) {
+var out = stack.pop();
+var rangeIndex = 2 * i;
+if (out < range[rangeIndex]) {
+out = range[rangeIndex];
+} else if (out > range[rangeIndex + 1]) {
+out = range[rangeIndex + 1];
+}
+transformed[i] = out;
+}
+cache.set(key, transformed);
+return transformed;
+};
+}
+};
+})();
+var FunctionCache = (function FunctionCacheClosure() {
+// Of 10 PDF's with type4 functions the maxium number of distinct values seen
+// was 256. This still may need some tweaking in the future though.
+var MAX_CACHE_SIZE = 1024;
+function FunctionCache() {
+this.cache = {};
+this.total = 0;
+}
+FunctionCache.prototype = {
+has: function FunctionCache_has(key) {
+return key in this.cache;
+},
+get: function FunctionCache_get(key) {
+return this.cache[key];
+},
+set: function FunctionCache_set(key, value) {
+if (this.total < MAX_CACHE_SIZE) {
+this.cache[key] = value;
+this.total++;
+}
+}
+};
+return FunctionCache;
+})();
+var PostScriptStack = (function PostScriptStackClosure() {
+var MAX_STACK_SIZE = 100;
+function PostScriptStack(initialStack) {
+this.stack = initialStack || [];
+}
+PostScriptStack.prototype = {
+push: function PostScriptStack_push(value) {
+if (this.stack.length >= MAX_STACK_SIZE) {
+error('PostScript function stack overflow.');
+}
+this.stack.push(value);
+},
+pop: function PostScriptStack_pop() {
+if (this.stack.length <= 0) {
+error('PostScript function stack underflow.');
+}
+return this.stack.pop();
+},
+copy: function PostScriptStack_copy(n) {
+if (this.stack.length + n >= MAX_STACK_SIZE) {
+error('PostScript function stack overflow.');
+}
+var stack = this.stack;
+for (var i = stack.length - n, j = n - 1; j >= 0; j--, i++) {
+stack.push(stack[i]);
+}
+},
+index: function PostScriptStack_index(n) {
+this.push(this.stack[this.stack.length - n - 1]);
+},
+// rotate the last n stack elements p times
+roll: function PostScriptStack_roll(n, p) {
+var stack = this.stack;
+var l = stack.length - n;
+var r = stack.length - 1, c = l + (p - Math.floor(p / n) * n), i, j, t;
+for (i = l, j = r; i < j; i++, j--) {
+t = stack[i]; stack[i] = stack[j]; stack[j] = t;
+}
+for (i = l, j = c - 1; i < j; i++, j--) {
+t = stack[i]; stack[i] = stack[j]; stack[j] = t;
+}
+for (i = c, j = r; i < j; i++, j--) {
+t = stack[i]; stack[i] = stack[j]; stack[j] = t;
+}
+}
+};
+return PostScriptStack;
+})();
+var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
+function PostScriptEvaluator(operators) {
+this.operators = operators;
+}
+PostScriptEvaluator.prototype = {
+execute: function PostScriptEvaluator_execute(initialStack) {
+var stack = new PostScriptStack(initialStack);
+var counter = 0;
+var operators = this.operators;
+var length = operators.length;
+var operator, a, b;
+while (counter < length) {
+operator = operators[counter++];
+if (typeof operator == 'number') {
+// Operator is really an operand and should be pushed to the stack.
+stack.push(operator);
+continue;
+}
+switch (operator) {
+// non standard ps operators
+case 'jz': // jump if false
+b = stack.pop();
+a = stack.pop();
+if (!a) {
+counter = b;
+}
+break;
+case 'j': // jump
+a = stack.pop();
+counter = a;
+break;
+// all ps operators in alphabetical order (excluding if/ifelse)
+case 'abs':
+a = stack.pop();
+stack.push(Math.abs(a));
+break;
+case 'add':
+b = stack.pop();
+a = stack.pop();
+stack.push(a + b);
+break;
+case 'and':
+b = stack.pop();
+a = stack.pop();
+if (isBool(a) && isBool(b)) {
+stack.push(a && b);
+} else {
+stack.push(a & b);
+}
+break;
+case 'atan':
+a = stack.pop();
+stack.push(Math.atan(a));
+break;
+case 'bitshift':
+b = stack.pop();
+a = stack.pop();
+if (a > 0) {
+stack.push(a << b);
+} else {
+stack.push(a >> b);
+}
+break;
+case 'ceiling':
+a = stack.pop();
+stack.push(Math.ceil(a));
+break;
+case 'copy':
+a = stack.pop();
+stack.copy(a);
+break;
+case 'cos':
+a = stack.pop();
+stack.push(Math.cos(a));
+break;
+case 'cvi':
+a = stack.pop() | 0;
+stack.push(a);
+break;
+case 'cvr':
+// noop
+break;
+case 'div':
+b = stack.pop();
+a = stack.pop();
+stack.push(a / b);
+break;
+case 'dup':
+stack.copy(1);
+break;
+case 'eq':
+b = stack.pop();
+a = stack.pop();
+stack.push(a == b);
+break;
+case 'exch':
+stack.roll(2, 1);
+break;
+case 'exp':
+b = stack.pop();
+a = stack.pop();
+stack.push(Math.pow(a, b));
+break;
+case 'false':
+stack.push(false);
+break;
+case 'floor':
+a = stack.pop();
+stack.push(Math.floor(a));
+break;
+case 'ge':
+b = stack.pop();
+a = stack.pop();
+stack.push(a >= b);
+break;
+case 'gt':
+b = stack.pop();
+a = stack.pop();
+stack.push(a > b);
+break;
+case 'idiv':
+b = stack.pop();
+a = stack.pop();
+stack.push((a / b) | 0);
+break;
+case 'index':
+a = stack.pop();
+stack.index(a);
+break;
+case 'le':
+b = stack.pop();
+a = stack.pop();
+stack.push(a <= b);
+break;
+case 'ln':
+a = stack.pop();
+stack.push(Math.log(a));
+break;
+case 'log':
+a = stack.pop();
+stack.push(Math.log(a) / Math.LN10);
+break;
+case 'lt':
+b = stack.pop();
+a = stack.pop();
+stack.push(a < b);
+break;
+case 'mod':
+b = stack.pop();
+a = stack.pop();
+stack.push(a % b);
+break;
+case 'mul':
+b = stack.pop();
+a = stack.pop();
+stack.push(a * b);
+break;
+case 'ne':
+b = stack.pop();
+a = stack.pop();
+stack.push(a != b);
+break;
+case 'neg':
+a = stack.pop();
+stack.push(-b);
+break;
+case 'not':
+a = stack.pop();
+if (isBool(a) && isBool(b)) {
+stack.push(a && b);
+} else {
+stack.push(a & b);
+}
+break;
+case 'or':
+b = stack.pop();
+a = stack.pop();
+if (isBool(a) && isBool(b)) {
+stack.push(a || b);
+} else {
+stack.push(a | b);
+}
+break;
+case 'pop':
+stack.pop();
+break;
+case 'roll':
+b = stack.pop();
+a = stack.pop();
+stack.roll(a, b);
+break;
+case 'round':
+a = stack.pop();
+stack.push(Math.round(a));
+break;
+case 'sin':
+a = stack.pop();
+stack.push(Math.sin(a));
+break;
+case 'sqrt':
+a = stack.pop();
+stack.push(Math.sqrt(a));
+break;
+case 'sub':
+b = stack.pop();
+a = stack.pop();
+stack.push(a - b);
+break;
+case 'true':
+stack.push(true);
+break;
+case 'truncate':
+a = stack.pop();
+a = a < 0 ? Math.ceil(a) : Math.floor(a);
+stack.push(a);
+break;
+case 'xor':
+b = stack.pop();
+a = stack.pop();
+if (isBool(a) && isBool(b)) {
+stack.push(a != b);
+} else {
+stack.push(a ^ b);
+}
+break;
+default:
+error('Unknown operator ' + operator);
+break;
+}
+}
+return stack.stack;
+}
+};
+return PostScriptEvaluator;
+})();
+var HIGHLIGHT_OFFSET = 4; // px
+var SUPPORTED_TYPES = ['Link', 'Text', 'Widget'];
+var Annotation = (function AnnotationClosure() {
+// 12.5.5: Algorithm: Appearance streams
+function getTransformMatrix(rect, bbox, matrix) {
+var bounds = Util.getAxialAlignedBoundingBox(bbox, matrix);
+var minX = bounds[0];
+var minY = bounds[1];
+var maxX = bounds[2];
+var maxY = bounds[3];
+if (minX === maxX || minY === maxY) {
+// From real-life file, bbox was [0, 0, 0, 0]. In this case,
+// just apply the transform for rect
+return [1, 0, 0, 1, rect[0], rect[1]];
+}
+var xRatio = (rect[2] - rect[0]) / (maxX - minX);
+var yRatio = (rect[3] - rect[1]) / (maxY - minY);
+return [
+xRatio,
+0,
+0,
+yRatio,
+rect[0] - minX * xRatio,
+rect[1] - minY * yRatio
+];
+}
+function getDefaultAppearance(dict) {
+var appearanceState = dict.get('AP');
+if (!isDict(appearanceState)) {
+return;
+}
+var appearance;
+var appearances = appearanceState.get('N');
+if (isDict(appearances)) {
+var as = dict.get('AS');
+if (as && appearances.has(as.name)) {
+appearance = appearances.get(as.name);
+}
+} else {
+appearance = appearances;
+}
+return appearance;
+}
+function Annotation(params) {
+if (params.data) {
+this.data = params.data;
+return;
+}
+var dict = params.dict;
+var data = this.data = {};
+data.subtype = dict.get('Subtype').name;
+var rect = dict.get('Rect') || [0, 0, 0, 0];
+data.rect = Util.normalizeRect(rect);
+data.annotationFlags = dict.get('F');
+var color = dict.get('C');
+if (isArray(color) && color.length === 3) {
+// TODO(mack): currently only supporting rgb; need support different
+// colorspaces
+data.color = color;
+} else {
+data.color = [0, 0, 0];
+}
+// Some types of annotations have border style dict which has more
+// info than the border array
+if (dict.has('BS')) {
+var borderStyle = dict.get('BS');
+data.borderWidth = borderStyle.has('W') ? borderStyle.get('W') : 1;
+} else {
+var borderArray = dict.get('Border') || [0, 0, 1];
+data.borderWidth = borderArray[2] || 0;
+// TODO: implement proper support for annotations with line dash patterns.
+var dashArray = borderArray[3];
+if (data.borderWidth > 0 && dashArray && isArray(dashArray)) {
+var dashArrayLength = dashArray.length;
+if (dashArrayLength > 0) {
+// According to the PDF specification: the elements in a dashArray
+// shall be numbers that are nonnegative and not all equal to zero.
+var isInvalid = false;
+var numPositive = 0;
+for (var i = 0; i < dashArrayLength; i++) {
+var validNumber = (+dashArray[i] >= 0);
+if (!validNumber) {
+isInvalid = true;
+break;
+} else if (dashArray[i] > 0) {
+numPositive++;
+}
+}
+if (isInvalid || numPositive === 0) {
+data.borderWidth = 0;
+}
+}
+}
+}
+this.appearance = getDefaultAppearance(dict);
+data.hasAppearance = !!this.appearance;
+data.id = params.ref.num;
+}
+Annotation.prototype = {
+getData: function Annotation_getData() {
+return this.data;
+},
+hasHtml: function Annotation_hasHtml() {
+return false;
+},
+getHtmlElement: function Annotation_getHtmlElement(commonObjs) {
+throw new NotImplementedException(
+'getHtmlElement() should be implemented in subclass');
+},
+// TODO(mack): Remove this, it's not really that helpful.
+getEmptyContainer: function Annotation_getEmptyContainer(tagName, rect,
+borderWidth) {
+assert(!isWorker,
+'getEmptyContainer() should be called from main thread');
+var bWidth = borderWidth || 0;
+rect = rect || this.data.rect;
+var element = document.createElement(tagName);
+element.style.borderWidth = bWidth + 'px';
+var width = rect[2] - rect[0] - 2 * bWidth;
+var height = rect[3] - rect[1] - 2 * bWidth;
+element.style.width = width + 'px';
+element.style.height = height + 'px';
+return element;
+},
+isInvisible: function Annotation_isInvisible() {
+var data = this.data;
+if (data && SUPPORTED_TYPES.indexOf(data.subtype) !== -1) {
+return false;
+} else {
+return !!(data &&
+data.annotationFlags &&            // Default: not invisible
+data.annotationFlags & 0x1);       // Invisible
+}
+},
+isViewable: function Annotation_isViewable() {
+var data = this.data;
+return !!(!this.isInvisible() &&
+data &&
+(!data.annotationFlags ||
+!(data.annotationFlags & 0x22)) &&  // Hidden or NoView
+data.rect);                          // rectangle is nessessary
+},
+isPrintable: function Annotation_isPrintable() {
+var data = this.data;
+return !!(!this.isInvisible() &&
+data &&
+data.annotationFlags &&              // Default: not printable
+data.annotationFlags & 0x4 &&        // Print
+data.rect);                          // rectangle is nessessary
+},
+loadResources: function(keys) {
+var promise = new LegacyPromise();
+this.appearance.dict.getAsync('Resources').then(function(resources) {
+if (!resources) {
+promise.resolve();
+return;
+}
+var objectLoader = new ObjectLoader(resources.map,
+keys,
+resources.xref);
+objectLoader.load().then(function() {
+promise.resolve(resources);
+});
+}.bind(this));
+return promise;
+},
+getOperatorList: function Annotation_getOperatorList(evaluator) {
+var promise = new LegacyPromise();
+if (!this.appearance) {
+promise.resolve(new OperatorList());
+return promise;
+}
+var data = this.data;
+var appearanceDict = this.appearance.dict;
+var resourcesPromise = this.loadResources([
+'ExtGState',
+'ColorSpace',
+'Pattern',
+'Shading',
+'XObject',
+'Font'
+// ProcSet
+// Properties
+]);
+var bbox = appearanceDict.get('BBox') || [0, 0, 1, 1];
+var matrix = appearanceDict.get('Matrix') || [1, 0, 0, 1, 0 ,0];
+var transform = getTransformMatrix(data.rect, bbox, matrix);
+resourcesPromise.then(function(resources) {
+var opList = new OperatorList();
+opList.addOp(OPS.beginAnnotation, [data.rect, transform, matrix]);
+evaluator.getOperatorList(this.appearance, resources, opList);
+opList.addOp(OPS.endAnnotation, []);
+promise.resolve(opList);
+this.appearance.reset();
+}.bind(this));
+return promise;
+}
+};
+Annotation.getConstructor =
+function Annotation_getConstructor(subtype, fieldType) {
+if (!subtype) {
+return;
+}
+// TODO(mack): Implement FreeText annotations
+if (subtype === 'Link') {
+return LinkAnnotation;
+} else if (subtype === 'Text') {
+return TextAnnotation;
+} else if (subtype === 'Widget') {
+if (!fieldType) {
+return;
+}
+if (fieldType === 'Tx') {
+return TextWidgetAnnotation;
+} else {
+return WidgetAnnotation;
+}
+} else {
+return Annotation;
+}
+};
+// TODO(mack): Support loading annotation from data
+Annotation.fromData = function Annotation_fromData(data) {
+var subtype = data.subtype;
+var fieldType = data.fieldType;
+var Constructor = Annotation.getConstructor(subtype, fieldType);
+if (Constructor) {
+return new Constructor({ data: data });
+}
+};
+Annotation.fromRef = function Annotation_fromRef(xref, ref) {
+var dict = xref.fetchIfRef(ref);
+if (!isDict(dict)) {
+return;
+}
+var subtype = dict.get('Subtype');
+subtype = isName(subtype) ? subtype.name : '';
+if (!subtype) {
+return;
+}
+var fieldType = Util.getInheritableProperty(dict, 'FT');
+fieldType = isName(fieldType) ? fieldType.name : '';
+var Constructor = Annotation.getConstructor(subtype, fieldType);
+if (!Constructor) {
+return;
+}
+var params = {
+dict: dict,
+ref: ref,
+};
+var annotation = new Constructor(params);
+if (annotation.isViewable() || annotation.isPrintable()) {
+return annotation;
+} else {
+warn('unimplemented annotation type: ' + subtype);
+}
+};
+Annotation.appendToOperatorList = function Annotation_appendToOperatorList(
+annotations, opList, pdfManager, partialEvaluator, intent) {
+function reject(e) {
+annotationsReadyPromise.reject(e);
+}
+var annotationsReadyPromise = new LegacyPromise();
+var annotationPromises = [];
+for (var i = 0, n = annotations.length; i < n; ++i) {
+if (intent === 'display' && annotations[i].isViewable() ||
+intent === 'print' && annotations[i].isPrintable()) {
+annotationPromises.push(
+annotations[i].getOperatorList(partialEvaluator));
+}
+}
+Promise.all(annotationPromises).then(function(datas) {
+opList.addOp(OPS.beginAnnotations, []);
+for (var i = 0, n = datas.length; i < n; ++i) {
+var annotOpList = datas[i];
+opList.addOpList(annotOpList);
+}
+opList.addOp(OPS.endAnnotations, []);
+annotationsReadyPromise.resolve();
+}, reject);
+return annotationsReadyPromise;
+};
+return Annotation;
+})();
+PDFJS.Annotation = Annotation;
+var WidgetAnnotation = (function WidgetAnnotationClosure() {
+function WidgetAnnotation(params) {
+Annotation.call(this, params);
+if (params.data) {
+return;
+}
+var dict = params.dict;
+var data = this.data;
+data.fieldValue = stringToPDFString(
+Util.getInheritableProperty(dict, 'V') || '');
+data.alternativeText = stringToPDFString(dict.get('TU') || '');
+data.defaultAppearance = Util.getInheritableProperty(dict, 'DA') || '';
+var fieldType = Util.getInheritableProperty(dict, 'FT');
+data.fieldType = isName(fieldType) ? fieldType.name : '';
+data.fieldFlags = Util.getInheritableProperty(dict, 'Ff') || 0;
+this.fieldResources = Util.getInheritableProperty(dict, 'DR') || Dict.empty;
+// Building the full field name by collecting the field and
+// its ancestors 'T' data and joining them using '.'.
+var fieldName = [];
+var namedItem = dict;
+var ref = params.ref;
+while (namedItem) {
+var parent = namedItem.get('Parent');
+var parentRef = namedItem.getRaw('Parent');
+var name = namedItem.get('T');
+if (name) {
+fieldName.unshift(stringToPDFString(name));
+} else {
+// The field name is absent, that means more than one field
+// with the same name may exist. Replacing the empty name
+// with the '`' plus index in the parent's 'Kids' array.
+// This is not in the PDF spec but necessary to id the
+// the input controls.
+var kids = parent.get('Kids');
+var j, jj;
+for (j = 0, jj = kids.length; j < jj; j++) {
+var kidRef = kids[j];
+if (kidRef.num == ref.num && kidRef.gen == ref.gen) {
+break;
+}
+}
+fieldName.unshift('`' + j);
+}
+namedItem = parent;
+ref = parentRef;
+}
+data.fullName = fieldName.join('.');
+}
+var parent = Annotation.prototype;
+Util.inherit(WidgetAnnotation, Annotation, {
+isViewable: function WidgetAnnotation_isViewable() {
+if (this.data.fieldType === 'Sig') {
+warn('unimplemented annotation type: Widget signature');
+return false;
+}
+return parent.isViewable.call(this);
+}
+});
+return WidgetAnnotation;
+})();
+var TextWidgetAnnotation = (function TextWidgetAnnotationClosure() {
+function TextWidgetAnnotation(params) {
+WidgetAnnotation.call(this, params);
+if (params.data) {
+return;
+}
+this.data.textAlignment = Util.getInheritableProperty(params.dict, 'Q');
+}
+// TODO(mack): This dupes some of the logic in CanvasGraphics.setFont()
+function setTextStyles(element, item, fontObj) {
+var style = element.style;
+style.fontSize = item.fontSize + 'px';
+style.direction = item.fontDirection < 0 ? 'rtl': 'ltr';
+if (!fontObj) {
+return;
+}
+style.fontWeight = fontObj.black ?
+(fontObj.bold ? 'bolder' : 'bold') :
+(fontObj.bold ? 'bold' : 'normal');
+style.fontStyle = fontObj.italic ? 'italic' : 'normal';
+var fontName = fontObj.loadedName;
+var fontFamily = fontName ? '"' + fontName + '", ' : '';
+// Use a reasonable default font if the font doesn't specify a fallback
+var fallbackName = fontObj.fallbackName || 'Helvetica, sans-serif';
+style.fontFamily = fontFamily + fallbackName;
+}
+Util.inherit(TextWidgetAnnotation, WidgetAnnotation, {
+hasHtml: function TextWidgetAnnotation_hasHtml() {
+return !this.data.hasAppearance && !!this.data.fieldValue;
+},
+getHtmlElement: function TextWidgetAnnotation_getHtmlElement(commonObjs) {
+assert(!isWorker, 'getHtmlElement() shall be called from main thread');
+var item = this.data;
+var element = this.getEmptyContainer('div');
+element.style.display = 'table';
+var content = document.createElement('div');
+content.textContent = item.fieldValue;
+var textAlignment = item.textAlignment;
+content.style.textAlign = ['left', 'center', 'right'][textAlignment];
+content.style.verticalAlign = 'middle';
+content.style.display = 'table-cell';
+var fontObj = item.fontRefName ?
+commonObjs.getData(item.fontRefName) : null;
+setTextStyles(content, item, fontObj);
+element.appendChild(content);
+return element;
+},
+getOperatorList: function TextWidgetAnnotation_getOperatorList(evaluator) {
+if (this.appearance) {
+return Annotation.prototype.getOperatorList.call(this, evaluator);
+}
+var promise = new LegacyPromise();
+var opList = new OperatorList();
+var data = this.data;
+// Even if there is an appearance stream, ignore it. This is the
+// behaviour used by Adobe Reader.
+var defaultAppearance = data.defaultAppearance;
+if (!defaultAppearance) {
+promise.resolve(opList);
+return promise;
+}
+// Include any font resources found in the default appearance
+var stream = new Stream(stringToBytes(defaultAppearance));
+evaluator.getOperatorList(stream, this.fieldResources, opList);
+var appearanceFnArray = opList.fnArray;
+var appearanceArgsArray = opList.argsArray;
+var fnArray = [];
+// TODO(mack): Add support for stroke color
+data.rgb = [0, 0, 0];
+// TODO THIS DOESN'T MAKE ANY SENSE SINCE THE fnArray IS EMPTY!
+for (var i = 0, n = fnArray.length; i < n; ++i) {
+var fnId = appearanceFnArray[i];
+var args = appearanceArgsArray[i];
+if (fnId === OPS.setFont) {
+data.fontRefName = args[0];
+var size = args[1];
+if (size < 0) {
+data.fontDirection = -1;
+data.fontSize = -size;
+} else {
+data.fontDirection = 1;
+data.fontSize = size;
+}
+} else if (fnId === OPS.setFillRGBColor) {
+data.rgb = args;
+} else if (fnId === OPS.setFillGray) {
+var rgbValue = args[0] * 255;
+data.rgb = [rgbValue, rgbValue, rgbValue];
+}
+}
+promise.resolve(opList);
+return promise;
+}
+});
+return TextWidgetAnnotation;
+})();
+var InteractiveAnnotation = (function InteractiveAnnotationClosure() {
+function InteractiveAnnotation(params) {
+Annotation.call(this, params);
+}
+Util.inherit(InteractiveAnnotation, Annotation, {
+hasHtml: function InteractiveAnnotation_hasHtml() {
+return true;
+},
+highlight: function InteractiveAnnotation_highlight() {
+if (this.highlightElement &&
+this.highlightElement.hasAttribute('hidden')) {
+this.highlightElement.removeAttribute('hidden');
+}
+},
+unhighlight: function InteractiveAnnotation_unhighlight() {
+if (this.highlightElement &&
+!this.highlightElement.hasAttribute('hidden')) {
+this.highlightElement.setAttribute('hidden', true);
+}
+},
+initContainer: function InteractiveAnnotation_initContainer() {
+var item = this.data;
+var rect = item.rect;
+var container = this.getEmptyContainer('section', rect, item.borderWidth);
+container.style.backgroundColor = item.color;
+var color = item.color;
+var rgb = [];
+for (var i = 0; i < 3; ++i) {
+rgb[i] = Math.round(color[i] * 255);
+}
+item.colorCssRgb = Util.makeCssRgb(rgb);
+var highlight = document.createElement('div');
+highlight.className = 'annotationHighlight';
+highlight.style.left = highlight.style.top = -HIGHLIGHT_OFFSET + 'px';
+highlight.style.right = highlight.style.bottom = -HIGHLIGHT_OFFSET + 'px';
+highlight.setAttribute('hidden', true);
+this.highlightElement = highlight;
+container.appendChild(this.highlightElement);
+return container;
+}
+});
+return InteractiveAnnotation;
+})();
+var TextAnnotation = (function TextAnnotationClosure() {
+function TextAnnotation(params) {
+InteractiveAnnotation.call(this, params);
+if (params.data) {
+return;
+}
+var dict = params.dict;
+var data = this.data;
+var content = dict.get('Contents');
+var title = dict.get('T');
+data.content = stringToPDFString(content || '');
+data.title = stringToPDFString(title || '');
+if (data.hasAppearance) {
+data.name = 'NoIcon';
+} else {
+data.name = dict.has('Name') ? dict.get('Name').name : 'Note';
+}
+if (dict.has('C')) {
+data.hasBgColor = true;
+}
+}
+var ANNOT_MIN_SIZE = 10;
+Util.inherit(TextAnnotation, InteractiveAnnotation, {
+getHtmlElement: function TextAnnotation_getHtmlElement(commonObjs) {
+assert(!isWorker, 'getHtmlElement() shall be called from main thread');
+var item = this.data;
+var rect = item.rect;
+// sanity check because of OOo-generated PDFs
+if ((rect[3] - rect[1]) < ANNOT_MIN_SIZE) {
+rect[3] = rect[1] + ANNOT_MIN_SIZE;
+}
+if ((rect[2] - rect[0]) < ANNOT_MIN_SIZE) {
+rect[2] = rect[0] + (rect[3] - rect[1]); // make it square
+}
+var container = this.initContainer();
+container.className = 'annotText';
+var image  = document.createElement('img');
+image.style.height = container.style.height;
+image.style.width = container.style.width;
+var iconName = item.name;
+image.src = PDFJS.imageResourcesPath + 'annotation-' +
+iconName.toLowerCase() + '.svg';
+image.alt = '[{{type}} Annotation]';
+image.dataset.l10nId = 'text_annotation_type';
+image.dataset.l10nArgs = JSON.stringify({type: iconName});
+var contentWrapper = document.createElement('div');
+contentWrapper.className = 'annotTextContentWrapper';
+contentWrapper.style.left = Math.floor(rect[2] - rect[0] + 5) + 'px';
+contentWrapper.style.top = '-10px';
+var content = document.createElement('div');
+content.className = 'annotTextContent';
+content.setAttribute('hidden', true);
+var i, ii;
+if (item.hasBgColor) {
+var color = item.color;
+var rgb = [];
+for (i = 0; i < 3; ++i) {
+// Enlighten the color (70%)
+var c = Math.round(color[i] * 255);
+rgb[i] = Math.round((255 - c) * 0.7) + c;
+}
+content.style.backgroundColor = Util.makeCssRgb(rgb);
+}
+var title = document.createElement('h1');
+var text = document.createElement('p');
+title.textContent = item.title;
+if (!item.content && !item.title) {
+content.setAttribute('hidden', true);
+} else {
+var e = document.createElement('span');
+var lines = item.content.split(/(?:\r\n?|\n)/);
+for (i = 0, ii = lines.length; i < ii; ++i) {
+var line = lines[i];
+e.appendChild(document.createTextNode(line));
+if (i < (ii - 1)) {
+e.appendChild(document.createElement('br'));
+}
+}
+text.appendChild(e);
+var pinned = false;
+var showAnnotation = function showAnnotation(pin) {
+if (pin) {
+pinned = true;
+}
+if (content.hasAttribute('hidden')) {
+container.style.zIndex += 1;
+content.removeAttribute('hidden');
+}
+};
+var hideAnnotation = function hideAnnotation(unpin) {
+if (unpin) {
+pinned = false;
+}
+if (!content.hasAttribute('hidden') && !pinned) {
+container.style.zIndex -= 1;
+content.setAttribute('hidden', true);
+}
+};
+var toggleAnnotation = function toggleAnnotation() {
+if (pinned) {
+hideAnnotation(true);
+} else {
+showAnnotation(true);
+}
+};
+image.addEventListener('click', function image_clickHandler() {
+toggleAnnotation();
+}, false);
+image.addEventListener('mouseover', function image_mouseOverHandler() {
+showAnnotation();
+}, false);
+image.addEventListener('mouseout', function image_mouseOutHandler() {
+hideAnnotation();
+}, false);
+content.addEventListener('click', function content_clickHandler() {
+hideAnnotation(true);
+}, false);
+}
+content.appendChild(title);
+content.appendChild(text);
+contentWrapper.appendChild(content);
+container.appendChild(image);
+container.appendChild(contentWrapper);
+return container;
+}
+});
+return TextAnnotation;
+})();
+var LinkAnnotation = (function LinkAnnotationClosure() {
+function LinkAnnotation(params) {
+InteractiveAnnotation.call(this, params);
+if (params.data) {
+return;
+}
+var dict = params.dict;
+var data = this.data;
+var action = dict.get('A');
+if (action) {
+var linkType = action.get('S').name;
+if (linkType === 'URI') {
+var url = action.get('URI');
+if (isName(url)) {
+// Some bad PDFs do not put parentheses around relative URLs.
+url = '/' + url.name;
+} else if (url) {
+url = addDefaultProtocolToUrl(url);
+}
+// TODO: pdf spec mentions urls can be relative to a Base
+// entry in the dictionary.
+if (!isValidUrl(url, false)) {
+url = '';
+}
+data.url = url;
+} else if (linkType === 'GoTo') {
+data.dest = action.get('D');
+} else if (linkType === 'GoToR') {
+var urlDict = action.get('F');
+if (isDict(urlDict)) {
+// We assume that the 'url' is a Filspec dictionary
+// and fetch the url without checking any further
+url = urlDict.get('F') || '';
+}
+// TODO: pdf reference says that GoToR
+// can also have 'NewWindow' attribute
+if (!isValidUrl(url, false)) {
+url = '';
+}
+data.url = url;
+data.dest = action.get('D');
+} else if (linkType === 'Named') {
+data.action = action.get('N').name;
+} else {
+warn('unrecognized link type: ' + linkType);
+}
+} else if (dict.has('Dest')) {
+// simple destination link
+var dest = dict.get('Dest');
+data.dest = isName(dest) ? dest.name : dest;
+}
+}
+// Lets URLs beginning with 'www.' default to using the 'http://' protocol.
+function addDefaultProtocolToUrl(url) {
+if (url && url.indexOf('www.') === 0) {
+return ('http://' + url);
+}
+return url;
+}
+Util.inherit(LinkAnnotation, InteractiveAnnotation, {
+hasOperatorList: function LinkAnnotation_hasOperatorList() {
+return false;
+},
+getHtmlElement: function LinkAnnotation_getHtmlElement(commonObjs) {
+var container = this.initContainer();
+container.className = 'annotLink';
+var item = this.data;
+container.style.borderColor = item.colorCssRgb;
+container.style.borderStyle = 'solid';
+var link = document.createElement('a');
+link.href = link.title = this.data.url || '';
+container.appendChild(link);
+return container;
+}
+});
+return LinkAnnotation;
+})();
+/**
+* The maximum allowed image size in total pixels e.g. width * height. Images
+* above this value will not be drawn. Use -1 for no limit.
+* @var {number}
+*/
+PDFJS.maxImageSize = (PDFJS.maxImageSize === undefined ?
+-1 : PDFJS.maxImageSize);
+/**
+* The url of where the predefined Adobe CMaps are located. Include trailing
+* slash.
+* @var {string}
+*/
+PDFJS.cMapUrl = (PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl);
+/**
+* Specifies if CMaps are binary packed.
+* @var {boolean}
+*/
+PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked;
+/*
+* By default fonts are converted to OpenType fonts and loaded via font face
+* rules. If disabled, the font will be rendered using a built in font renderer
+* that constructs the glyphs with primitive path commands.
+* @var {boolean}
+*/
+PDFJS.disableFontFace = (PDFJS.disableFontFace === undefined ?
+false : PDFJS.disableFontFace);
+/**
+* Path for image resources, mainly for annotation icons. Include trailing
+* slash.
+* @var {string}
+*/
+PDFJS.imageResourcesPath = (PDFJS.imageResourcesPath === undefined ?
+'' : PDFJS.imageResourcesPath);
+/**
+* Disable the web worker and run all code on the main thread. This will happen
+* automatically if the browser doesn't support workers or sending typed arrays
+* to workers.
+* @var {boolean}
+*/
+PDFJS.disableWorker = (PDFJS.disableWorker === undefined ?
+false : PDFJS.disableWorker);
+/**
+* Path and filename of the worker file. Required when the worker is enabled in
+* development mode. If unspecified in the production build, the worker will be
+* loaded based on the location of the pdf.js file.
+* @var {string}
+*/
+PDFJS.workerSrc = (PDFJS.workerSrc === undefined ? null : PDFJS.workerSrc);
+/**
+* Disable range request loading of PDF files. When enabled and if the server
+* supports partial content requests then the PDF will be fetched in chunks.
+* Enabled (false) by default.
+* @var {boolean}
+*/
+PDFJS.disableRange = (PDFJS.disableRange === undefined ?
+false : PDFJS.disableRange);
+/**
+* Disable pre-fetching of PDF file data. When range requests are enabled PDF.js
+* will automatically keep fetching more data even if it isn't needed to display
+* the current page. This default behavior can be disabled.
+* @var {boolean}
+*/
+PDFJS.disableAutoFetch = (PDFJS.disableAutoFetch === undefined ?
+false : PDFJS.disableAutoFetch);
+/**
+* Enables special hooks for debugging PDF.js.
+* @var {boolean}
+*/
+PDFJS.pdfBug = (PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug);
+/**
+* Enables transfer usage in postMessage for ArrayBuffers.
+* @var {boolean}
+*/
+PDFJS.postMessageTransfers = (PDFJS.postMessageTransfers === undefined ?
+true : PDFJS.postMessageTransfers);
+/**
+* Disables URL.createObjectURL usage.
+* @var {boolean}
+*/
+PDFJS.disableCreateObjectURL = (PDFJS.disableCreateObjectURL === undefined ?
+false : PDFJS.disableCreateObjectURL);
+/**
+* Disables WebGL usage.
+* @var {boolean}
+*/
+PDFJS.disableWebGL = (PDFJS.disableWebGL === undefined ?
+true : PDFJS.disableWebGL);
+/**
+* Controls the logging level.
+* The constants from PDFJS.VERBOSITY_LEVELS should be used:
+* - errors
+* - warnings [default]
+* - infos
+* @var {number}
+*/
+PDFJS.verbosity = (PDFJS.verbosity === undefined ?
+PDFJS.VERBOSITY_LEVELS.warnings : PDFJS.verbosity);
+/**
+* Document initialization / loading parameters object.
+*
+* @typedef {Object} DocumentInitParameters
+* @property {string}     url   - The URL of the PDF.
+* @property {TypedArray} data  - A typed array with PDF data.
+* @property {Object}     httpHeaders - Basic authentication headers.
+* @property {boolean}    withCredentials - Indicates whether or not cross-site
+*   Access-Control requests should be made using credentials such as cookies
+*   or authorization headers. The default is false.
+* @property {string}     password - For decrypting password-protected PDFs.
+* @property {TypedArray} initialData - A typed array with the first portion or
+*   all of the pdf data. Used by the extension since some data is already
+*   loaded before the switch to range requests.
+*/
+/**
+* This is the main entry point for loading a PDF and interacting with it.
+* NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)
+* is used, which means it must follow the same origin rules that any XHR does
+* e.g. No cross domain requests without CORS.
+*
+* @param {string|TypedArray|DocumentInitParameters} source Can be a url to
+* where a PDF is located, a typed array (Uint8Array) already populated with
+* data or parameter object.
+*
+* @param {Object} pdfDataRangeTransport is optional. It is used if you want
+* to manually serve range requests for data in the PDF. See viewer.js for
+* an example of pdfDataRangeTransport's interface.
+*
+* @param {function} passwordCallback is optional. It is used to request a
+* password if wrong or no password was provided. The callback receives two
+* parameters: function that needs to be called with new password and reason
+* (see {PasswordResponses}).
+*
+* @return {Promise} A promise that is resolved with {@link PDFDocumentProxy}
+*   object.
+*/
+PDFJS.getDocument = function getDocument(source,
+pdfDataRangeTransport,
+passwordCallback,
+progressCallback) {
+var workerInitializedPromise, workerReadyPromise, transport;
+if (typeof source === 'string') {
+source = { url: source };
+} else if (isArrayBuffer(source)) {
+source = { data: source };
+} else if (typeof source !== 'object') {
+error('Invalid parameter in getDocument, need either Uint8Array, ' +
+'string or a parameter object');
+}
+if (!source.url && !source.data) {
+error('Invalid parameter array, need either .data or .url');
+}
+// copy/use all keys as is except 'url' -- full path is required
+var params = {};
+for (var key in source) {
+if (key === 'url' && typeof window !== 'undefined') {
+params[key] = combineUrl(window.location.href, source[key]);
+continue;
+}
+params[key] = source[key];
+}
+workerInitializedPromise = new PDFJS.LegacyPromise();
+workerReadyPromise = new PDFJS.LegacyPromise();
+transport = new WorkerTransport(workerInitializedPromise, workerReadyPromise,
+pdfDataRangeTransport, progressCallback);
+workerInitializedPromise.then(function transportInitialized() {
+transport.passwordCallback = passwordCallback;
+transport.fetchDocument(params);
+});
+return workerReadyPromise;
+};
+/**
+* Proxy to a PDFDocument in the worker thread. Also, contains commonly used
+* properties that can be read synchronously.
+* @class
+*/
+var PDFDocumentProxy = (function PDFDocumentProxyClosure() {
+function PDFDocumentProxy(pdfInfo, transport) {
+this.pdfInfo = pdfInfo;
+this.transport = transport;
+}
+PDFDocumentProxy.prototype = /** @lends PDFDocumentProxy.prototype */ {
+/**
+* @return {number} Total number of pages the PDF contains.
+*/
+get numPages() {
+return this.pdfInfo.numPages;
+},
+/**
+* @return {string} A unique ID to identify a PDF. Not guaranteed to be
+* unique.
+*/
+get fingerprint() {
+return this.pdfInfo.fingerprint;
+},
+/**
+* @param {number} pageNumber The page number to get. The first page is 1.
+* @return {Promise} A promise that is resolved with a {@link PDFPageProxy}
+* object.
+*/
+getPage: function PDFDocumentProxy_getPage(pageNumber) {
+return this.transport.getPage(pageNumber);
+},
+/**
+* @param {{num: number, gen: number}} ref The page reference. Must have
+*   the 'num' and 'gen' properties.
+* @return {Promise} A promise that is resolved with the page index that is
+* associated with the reference.
+*/
+getPageIndex: function PDFDocumentProxy_getPageIndex(ref) {
+return this.transport.getPageIndex(ref);
+},
+/**
+* @return {Promise} A promise that is resolved with a lookup table for
+* mapping named destinations to reference numbers.
+*/
+getDestinations: function PDFDocumentProxy_getDestinations() {
+return this.transport.getDestinations();
+},
+/**
+* @return {Promise} A promise that is resolved with a lookup table for
+* mapping named attachments to their content.
+*/
+getAttachments: function PDFDocumentProxy_getAttachments() {
+return this.transport.getAttachments();
+},
+/**
+* @return {Promise} A promise that is resolved with an array of all the
+* JavaScript strings in the name tree.
+*/
+getJavaScript: function PDFDocumentProxy_getJavaScript() {
+var promise = new PDFJS.LegacyPromise();
+var js = this.pdfInfo.javaScript;
+promise.resolve(js);
+return promise;
+},
+/**
+* @return {Promise} A promise that is resolved with an {Array} that is a
+* tree outline (if it has one) of the PDF. The tree is in the format of:
+* [
+*  {
+*   title: string,
+*   bold: boolean,
+*   italic: boolean,
+*   color: rgb array,
+*   dest: dest obj,
+*   items: array of more items like this
+*  },
+*  ...
+* ].
+*/
+getOutline: function PDFDocumentProxy_getOutline() {
+var promise = new PDFJS.LegacyPromise();
+var outline = this.pdfInfo.outline;
+promise.resolve(outline);
+return promise;
+},
+/**
+* @return {Promise} A promise that is resolved with an {Object} that has
+* info and metadata properties.  Info is an {Object} filled with anything
+* available in the information dictionary and similarly metadata is a
+* {Metadata} object with information from the metadata section of the PDF.
+*/
+getMetadata: function PDFDocumentProxy_getMetadata() {
+var promise = new PDFJS.LegacyPromise();
+var info = this.pdfInfo.info;
+var metadata = this.pdfInfo.metadata;
+promise.resolve({
+info: info,
+metadata: (metadata ? new PDFJS.Metadata(metadata) : null)
+});
+return promise;
+},
+/**
+* @return {Promise} A promise that is resolved with a TypedArray that has
+* the raw data from the PDF.
+*/
+getData: function PDFDocumentProxy_getData() {
+var promise = new PDFJS.LegacyPromise();
+this.transport.getData(promise);
+return promise;
+},
+/**
+* @return {Promise} A promise that is resolved when the document's data
+* is loaded. It is resolved with an {Object} that contains the length
+* property that indicates size of the PDF data in bytes.
+*/
+getDownloadInfo: function PDFDocumentProxy_getDownloadInfo() {
+return this.transport.downloadInfoPromise;
+},
+/**
+* Cleans up resources allocated by the document, e.g. created @font-face.
+*/
+cleanup: function PDFDocumentProxy_cleanup() {
+this.transport.startCleanup();
+},
+/**
+* Destroys current document instance and terminates worker.
+*/
+destroy: function PDFDocumentProxy_destroy() {
+this.transport.destroy();
+}
+};
+return PDFDocumentProxy;
+})();
+/**
+* Page text content.
+*
+* @typedef {Object} TextContent
+* @property {array} items - array of {@link TextItem}
+* @property {Object} styles - {@link TextStyles} objects, indexed by font
+*                    name.
+*/
+/**
+* Page text content part.
+*
+* @typedef {Object} TextItem
+* @property {string} str - text content.
+* @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'.
+* @property {array} transform - transformation matrix.
+* @property {number} width - width in device space.
+* @property {number} height - height in device space.
+* @property {string} fontName - font name used by pdf.js for converted font.
+*/
+/**
+* Text style.
+*
+* @typedef {Object} TextStyle
+* @property {number} ascent - font ascent.
+* @property {number} descent - font descent.
+* @property {boolean} vertical - text is in vertical mode.
+* @property {string} fontFamily - possible font family
+*/
+/**
+* Page render parameters.
+*
+* @typedef {Object} RenderParameters
+* @property {Object} canvasContext - A 2D context of a DOM Canvas object.
+* @property {PageViewport} viewport - Rendering viewport obtained by
+*                          calling of PDFPage.getViewport method.
+* @property {string} intent - Rendering intent, can be 'display' or 'print'
+*                    (default value is 'display').
+* @property {Object} imageLayer - (optional) An object that has beginLayout,
+*                    endLayout and appendImage functions.
+* @property {function} continueCallback - (optional) A function that will be
+*                      called each time the rendering is paused.  To continue
+*                      rendering call the function that is the first argument
+*                      to the callback.
+*/
+/**
+* Proxy to a PDFPage in the worker thread.
+* @class
+*/
+var PDFPageProxy = (function PDFPageProxyClosure() {
+function PDFPageProxy(pageInfo, transport) {
+this.pageInfo = pageInfo;
+this.transport = transport;
+this.stats = new StatTimer();
+this.stats.enabled = !!globalScope.PDFJS.enableStats;
+this.commonObjs = transport.commonObjs;
+this.objs = new PDFObjects();
+this.cleanupAfterRender = false;
+this.pendingDestroy = false;
+this.intentStates = {};
+}
+PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ {
+/**
+* @return {number} Page number of the page. First page is 1.
+*/
+get pageNumber() {
+return this.pageInfo.pageIndex + 1;
+},
+/**
+* @return {number} The number of degrees the page is rotated clockwise.
+*/
+get rotate() {
+return this.pageInfo.rotate;
+},
+/**
+* @return {Object} The reference that points to this page. It has 'num' and
+* 'gen' properties.
+*/
+get ref() {
+return this.pageInfo.ref;
+},
+/**
+* @return {Array} An array of the visible portion of the PDF page in the
+* user space units - [x1, y1, x2, y2].
+*/
+get view() {
+return this.pageInfo.view;
+},
+/**
+* @param {number} scale The desired scale of the viewport.
+* @param {number} rotate Degrees to rotate the viewport. If omitted this
+* defaults to the page rotation.
+* @return {PageViewport} Contains 'width' and 'height' properties along
+* with transforms required for rendering.
+*/
+getViewport: function PDFPageProxy_getViewport(scale, rotate) {
+if (arguments.length < 2) {
+rotate = this.rotate;
+}
+return new PDFJS.PageViewport(this.view, scale, rotate, 0, 0);
+},
+/**
+* @return {Promise} A promise that is resolved with an {Array} of the
+* annotation objects.
+*/
+getAnnotations: function PDFPageProxy_getAnnotations() {
+if (this.annotationsPromise) {
+return this.annotationsPromise;
+}
+var promise = new PDFJS.LegacyPromise();
+this.annotationsPromise = promise;
+this.transport.getAnnotations(this.pageInfo.pageIndex);
+return promise;
+},
+/**
+* Begins the process of rendering a page to the desired context.
+* @param {RenderParameters} params Page render parameters.
+* @return {RenderTask} An object that contains the promise, which
+*                      is resolved when the page finishes rendering.
+*/
+render: function PDFPageProxy_render(params) {
+var stats = this.stats;
+stats.time('Overall');
+// If there was a pending destroy cancel it so no cleanup happens during
+// this call to render.
+this.pendingDestroy = false;
+var renderingIntent = ('intent' in params ?
+(params.intent == 'print' ? 'print' : 'display') : 'display');
+if (!this.intentStates[renderingIntent]) {
+this.intentStates[renderingIntent] = {};
+}
+var intentState = this.intentStates[renderingIntent];
+// If there is no displayReadyPromise yet, then the operatorList was never
+// requested before. Make the request and create the promise.
+if (!intentState.displayReadyPromise) {
+intentState.receivingOperatorList = true;
+intentState.displayReadyPromise = new LegacyPromise();
+intentState.operatorList = {
+fnArray: [],
+argsArray: [],
+lastChunk: false
+};
+this.stats.time('Page Request');
+this.transport.messageHandler.send('RenderPageRequest', {
+pageIndex: this.pageNumber - 1,
+intent: renderingIntent
+});
+}
+var internalRenderTask = new InternalRenderTask(complete, params,
+this.objs,
+this.commonObjs,
+intentState.operatorList,
+this.pageNumber);
+if (!intentState.renderTasks) {
+intentState.renderTasks = [];
+}
+intentState.renderTasks.push(internalRenderTask);
+var renderTask = new RenderTask(internalRenderTask);
+var self = this;
+intentState.displayReadyPromise.then(
+function pageDisplayReadyPromise(transparency) {
+if (self.pendingDestroy) {
+complete();
+return;
+}
+stats.time('Rendering');
+internalRenderTask.initalizeGraphics(transparency);
+internalRenderTask.operatorListChanged();
+},
+function pageDisplayReadPromiseError(reason) {
+complete(reason);
+}
+);
+function complete(error) {
+var i = intentState.renderTasks.indexOf(internalRenderTask);
+if (i >= 0) {
+intentState.renderTasks.splice(i, 1);
+}
+if (self.cleanupAfterRender) {
+self.pendingDestroy = true;
+}
+self._tryDestroy();
+if (error) {
+renderTask.promise.reject(error);
+} else {
+renderTask.promise.resolve();
+}
+stats.timeEnd('Rendering');
+stats.timeEnd('Overall');
+}
+return renderTask;
+},
+/**
+* @return {Promise} That is resolved a {@link TextContent}
+* object that represent the page text content.
+*/
+getTextContent: function PDFPageProxy_getTextContent() {
+var promise = new PDFJS.LegacyPromise();
+this.transport.messageHandler.send('GetTextContent', {
+pageIndex: this.pageNumber - 1
+},
+function textContentCallback(textContent) {
+promise.resolve(textContent);
+}
+);
+return promise;
+},
+/**
+* Destroys resources allocated by the page.
+*/
+destroy: function PDFPageProxy_destroy() {
+this.pendingDestroy = true;
+this._tryDestroy();
+},
+/**
+* For internal use only. Attempts to clean up if rendering is in a state
+* where that's possible.
+* @ignore
+*/
+_tryDestroy: function PDFPageProxy__destroy() {
+if (!this.pendingDestroy ||
+Object.keys(this.intentStates).some(function(intent) {
+var intentState = this.intentStates[intent];
+return (intentState.renderTasks.length !== 0 ||
+intentState.receivingOperatorList);
+}, this)) {
+return;
+}
+Object.keys(this.intentStates).forEach(function(intent) {
+delete this.intentStates[intent];
+}, this);
+this.objs.clear();
+this.pendingDestroy = false;
+},
+/**
+* For internal use only.
+* @ignore
+*/
+_startRenderPage: function PDFPageProxy_startRenderPage(transparency,
+intent) {
+var intentState = this.intentStates[intent];
+intentState.displayReadyPromise.resolve(transparency);
+},
+/**
+* For internal use only.
+* @ignore
+*/
+_renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk,
+intent) {
+var intentState = this.intentStates[intent];
+var i, ii;
+// Add the new chunk to the current operator list.
+for (i = 0, ii = operatorListChunk.length; i < ii; i++) {
+intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]);
+intentState.operatorList.argsArray.push(
+operatorListChunk.argsArray[i]);
+}
+intentState.operatorList.lastChunk = operatorListChunk.lastChunk;
+// Notify all the rendering tasks there are more operators to be consumed.
+for (i = 0; i < intentState.renderTasks.length; i++) {
+intentState.renderTasks[i].operatorListChanged();
+}
+if (operatorListChunk.lastChunk) {
+intentState.receivingOperatorList = false;
+this._tryDestroy();
+}
+}
+};
+return PDFPageProxy;
+})();
+/**
+* For internal use only.
+* @ignore
+*/
+var WorkerTransport = (function WorkerTransportClosure() {
+function WorkerTransport(workerInitializedPromise, workerReadyPromise,
+pdfDataRangeTransport, progressCallback) {
+this.pdfDataRangeTransport = pdfDataRangeTransport;
+this.workerReadyPromise = workerReadyPromise;
+this.progressCallback = progressCallback;
+this.commonObjs = new PDFObjects();
+this.pageCache = [];
+this.pagePromises = [];
+this.downloadInfoPromise = new PDFJS.LegacyPromise();
+this.passwordCallback = null;
+// If worker support isn't disabled explicit and the browser has worker
+// support, create a new web worker and test if it/the browser fullfills
+// all requirements to run parts of pdf.js in a web worker.
+// Right now, the requirement is, that an Uint8Array is still an Uint8Array
+// as it arrives on the worker. Chrome added this with version 15.
+if (!globalScope.PDFJS.disableWorker && typeof Worker !== 'undefined') {
+var workerSrc = PDFJS.workerSrc;
+if (!workerSrc) {
+error('No PDFJS.workerSrc specified');
+}
+try {
+// Some versions of FF can't create a worker on localhost, see:
+// https://bugzilla.mozilla.org/show_bug.cgi?id=683280
+var worker = new Worker(workerSrc);
+var messageHandler = new MessageHandler('main', worker);
+this.messageHandler = messageHandler;
+messageHandler.on('test', function transportTest(data) {
+var supportTypedArray = data && data.supportTypedArray;
+if (supportTypedArray) {
+this.worker = worker;
+if (!data.supportTransfers) {
+PDFJS.postMessageTransfers = false;
+}
+this.setupMessageHandler(messageHandler);
+workerInitializedPromise.resolve();
+} else {
+globalScope.PDFJS.disableWorker = true;
+this.loadFakeWorkerFiles().then(function() {
+this.setupFakeWorker();
+workerInitializedPromise.resolve();
+}.bind(this));
+}
+}.bind(this));
+var testObj = new Uint8Array([PDFJS.postMessageTransfers ? 255 : 0]);
+// Some versions of Opera throw a DATA_CLONE_ERR on serializing the
+// typed array. Also, checking if we can use transfers.
+try {
+messageHandler.send('test', testObj, null, [testObj.buffer]);
+} catch (ex) {
+info('Cannot use postMessage transfers');
+testObj[0] = 0;
+messageHandler.send('test', testObj);
+}
+return;
+} catch (e) {
+info('The worker has been disabled.');
+}
+}
+// Either workers are disabled, not supported or have thrown an exception.
+// Thus, we fallback to a faked worker.
+globalScope.PDFJS.disableWorker = true;
+this.loadFakeWorkerFiles().then(function() {
+this.setupFakeWorker();
+workerInitializedPromise.resolve();
+}.bind(this));
+}
+WorkerTransport.prototype = {
+destroy: function WorkerTransport_destroy() {
+this.pageCache = [];
+this.pagePromises = [];
+var self = this;
+this.messageHandler.send('Terminate', null, function () {
+FontLoader.clear();
+if (self.worker) {
+self.worker.terminate();
+}
+});
+},
+loadFakeWorkerFiles: function WorkerTransport_loadFakeWorkerFiles() {
+if (!PDFJS.fakeWorkerFilesLoadedPromise) {
+PDFJS.fakeWorkerFilesLoadedPromise = new LegacyPromise();
+// In the developer build load worker_loader which in turn loads all the
+// other files and resolves the promise. In production only the
+// pdf.worker.js file is needed.
+Util.loadScript(PDFJS.workerSrc, function() {
+PDFJS.fakeWorkerFilesLoadedPromise.resolve();
+});
+}
+return PDFJS.fakeWorkerFilesLoadedPromise;
+},
+setupFakeWorker: function WorkerTransport_setupFakeWorker() {
+warn('Setting up fake worker.');
+// If we don't use a worker, just post/sendMessage to the main thread.
+var fakeWorker = {
+postMessage: function WorkerTransport_postMessage(obj) {
+fakeWorker.onmessage({data: obj});
+},
+terminate: function WorkerTransport_terminate() {}
+};
+var messageHandler = new MessageHandler('main', fakeWorker);
+this.setupMessageHandler(messageHandler);
+// If the main thread is our worker, setup the handling for the messages
+// the main thread sends to it self.
+PDFJS.WorkerMessageHandler.setup(messageHandler);
+},
+setupMessageHandler:
+function WorkerTransport_setupMessageHandler(messageHandler) {
+this.messageHandler = messageHandler;
+function updatePassword(password) {
+messageHandler.send('UpdatePassword', password);
+}
+var pdfDataRangeTransport = this.pdfDataRangeTransport;
+if (pdfDataRangeTransport) {
+pdfDataRangeTransport.addRangeListener(function(begin, chunk) {
+messageHandler.send('OnDataRange', {
+begin: begin,
+chunk: chunk
+});
+});
+pdfDataRangeTransport.addProgressListener(function(loaded) {
+messageHandler.send('OnDataProgress', {
+loaded: loaded
+});
+});
+messageHandler.on('RequestDataRange',
+function transportDataRange(data) {
+pdfDataRangeTransport.requestDataRange(data.begin, data.end);
+}, this);
+}
+messageHandler.on('GetDoc', function transportDoc(data) {
+var pdfInfo = data.pdfInfo;
+this.numPages = data.pdfInfo.numPages;
+var pdfDocument = new PDFDocumentProxy(pdfInfo, this);
+this.pdfDocument = pdfDocument;
+this.workerReadyPromise.resolve(pdfDocument);
+}, this);
+messageHandler.on('NeedPassword', function transportPassword(data) {
+if (this.passwordCallback) {
+return this.passwordCallback(updatePassword,
+PasswordResponses.NEED_PASSWORD);
+}
+this.workerReadyPromise.reject(data.exception.message, data.exception);
+}, this);
+messageHandler.on('IncorrectPassword', function transportBadPass(data) {
+if (this.passwordCallback) {
+return this.passwordCallback(updatePassword,
+PasswordResponses.INCORRECT_PASSWORD);
+}
+this.workerReadyPromise.reject(data.exception.message, data.exception);
+}, this);
+messageHandler.on('InvalidPDF', function transportInvalidPDF(data) {
+this.workerReadyPromise.reject(data.exception.name, data.exception);
+}, this);
+messageHandler.on('MissingPDF', function transportMissingPDF(data) {
+this.workerReadyPromise.reject(data.exception.message, data.exception);
+}, this);
+messageHandler.on('UnknownError', function transportUnknownError(data) {
+this.workerReadyPromise.reject(data.exception.message, data.exception);
+}, this);
+messageHandler.on('DataLoaded', function transportPage(data) {
+this.downloadInfoPromise.resolve(data);
+}, this);
+messageHandler.on('GetPage', function transportPage(data) {
+var pageInfo = data.pageInfo;
+var page = new PDFPageProxy(pageInfo, this);
+this.pageCache[pageInfo.pageIndex] = page;
+var promise = this.pagePromises[pageInfo.pageIndex];
+promise.resolve(page);
+}, this);
+messageHandler.on('GetAnnotations', function transportAnnotations(data) {
+var annotations = data.annotations;
+var promise = this.pageCache[data.pageIndex].annotationsPromise;
+promise.resolve(annotations);
+}, this);
+messageHandler.on('StartRenderPage', function transportRender(data) {
+var page = this.pageCache[data.pageIndex];
+page.stats.timeEnd('Page Request');
+page._startRenderPage(data.transparency, data.intent);
+}, this);
+messageHandler.on('RenderPageChunk', function transportRender(data) {
+var page = this.pageCache[data.pageIndex];
+page._renderPageChunk(data.operatorList, data.intent);
+}, this);
+messageHandler.on('commonobj', function transportObj(data) {
+var id = data[0];
+var type = data[1];
+if (this.commonObjs.hasData(id)) {
+return;
+}
+switch (type) {
+case 'Font':
+var exportedData = data[2];
+var font;
+if ('error' in exportedData) {
+var error = exportedData.error;
+warn('Error during font loading: ' + error);
+this.commonObjs.resolve(id, error);
+break;
+} else {
+font = new FontFace(exportedData);
+}
+FontLoader.bind(
+[font],
+function fontReady(fontObjs) {
+this.commonObjs.resolve(id, font);
+}.bind(this)
+);
+break;
+case 'FontPath':
+this.commonObjs.resolve(id, data[2]);
+break;
+default:
+error('Got unknown common object type ' + type);
+}
+}, this);
+messageHandler.on('obj', function transportObj(data) {
+var id = data[0];
+var pageIndex = data[1];
+var type = data[2];
+var pageProxy = this.pageCache[pageIndex];
+var imageData;
+if (pageProxy.objs.hasData(id)) {
+return;
+}
+switch (type) {
+case 'JpegStream':
+imageData = data[3];
+loadJpegStream(id, imageData, pageProxy.objs);
+break;
+case 'Image':
+imageData = data[3];
+pageProxy.objs.resolve(id, imageData);
+// heuristics that will allow not to store large data
+var MAX_IMAGE_SIZE_TO_STORE = 8000000;
+if (imageData && 'data' in imageData &&
+imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) {
+pageProxy.cleanupAfterRender = true;
+}
+break;
+default:
+error('Got unknown object type ' + type);
+}
+}, this);
+messageHandler.on('DocProgress', function transportDocProgress(data) {
+if (this.progressCallback) {
+this.progressCallback({
+loaded: data.loaded,
+total: data.total
+});
+}
+}, this);
+messageHandler.on('DocError', function transportDocError(data) {
+this.workerReadyPromise.reject(data);
+}, this);
+messageHandler.on('PageError', function transportError(data, intent) {
+var page = this.pageCache[data.pageNum - 1];
+var intentState = page.intentStates[intent];
+if (intentState.displayReadyPromise) {
+intentState.displayReadyPromise.reject(data.error);
+} else {
+error(data.error);
+}
+}, this);
+messageHandler.on('JpegDecode', function(data, deferred) {
+var imageUrl = data[0];
+var components = data[1];
+if (components != 3 && components != 1) {
+error('Only 3 component or 1 component can be returned');
+}
+var img = new Image();
+img.onload = (function messageHandler_onloadClosure() {
+var width = img.width;
+var height = img.height;
+var size = width * height;
+var rgbaLength = size * 4;
+var buf = new Uint8Array(size * components);
+var tmpCanvas = createScratchCanvas(width, height);
+var tmpCtx = tmpCanvas.getContext('2d');
+tmpCtx.drawImage(img, 0, 0);
+var data = tmpCtx.getImageData(0, 0, width, height).data;
+var i, j;
+if (components == 3) {
+for (i = 0, j = 0; i < rgbaLength; i += 4, j += 3) {
+buf[j] = data[i];
+buf[j + 1] = data[i + 1];
+buf[j + 2] = data[i + 2];
+}
+} else if (components == 1) {
+for (i = 0, j = 0; i < rgbaLength; i += 4, j++) {
+buf[j] = data[i];
+}
+}
+deferred.resolve({ data: buf, width: width, height: height});
+}).bind(this);
+img.src = imageUrl;
+});
+},
+fetchDocument: function WorkerTransport_fetchDocument(source) {
+source.disableAutoFetch = PDFJS.disableAutoFetch;
+source.chunkedViewerLoading = !!this.pdfDataRangeTransport;
+this.messageHandler.send('GetDocRequest', {
+source: source,
+disableRange: PDFJS.disableRange,
+maxImageSize: PDFJS.maxImageSize,
+cMapUrl: PDFJS.cMapUrl,
+cMapPacked: PDFJS.cMapPacked,
+disableFontFace: PDFJS.disableFontFace,
+disableCreateObjectURL: PDFJS.disableCreateObjectURL,
+verbosity: PDFJS.verbosity
+});
+},
+getData: function WorkerTransport_getData(promise) {
+this.messageHandler.send('GetData', null, function(data) {
+promise.resolve(data);
+});
+},
+getPage: function WorkerTransport_getPage(pageNumber, promise) {
+if (pageNumber <= 0 || pageNumber > this.numPages ||
+(pageNumber|0) !== pageNumber) {
+var pagePromise = new PDFJS.LegacyPromise();
+pagePromise.reject(new Error('Invalid page request'));
+return pagePromise;
+}
+var pageIndex = pageNumber - 1;
+if (pageIndex in this.pagePromises) {
+return this.pagePromises[pageIndex];
+}
+promise = new PDFJS.LegacyPromise();
+this.pagePromises[pageIndex] = promise;
+this.messageHandler.send('GetPageRequest', { pageIndex: pageIndex });
+return promise;
+},
+getPageIndex: function WorkerTransport_getPageIndexByRef(ref) {
+var promise = new PDFJS.LegacyPromise();
+this.messageHandler.send('GetPageIndex', { ref: ref },
+function (pageIndex) {
+promise.resolve(pageIndex);
+}
+);
+return promise;
+},
+getAnnotations: function WorkerTransport_getAnnotations(pageIndex) {
+this.messageHandler.send('GetAnnotationsRequest',
+{ pageIndex: pageIndex });
+},
+getDestinations: function WorkerTransport_getDestinations() {
+var promise = new PDFJS.LegacyPromise();
+this.messageHandler.send('GetDestinations', null,
+function transportDestinations(destinations) {
+promise.resolve(destinations);
+}
+);
+return promise;
+},
+getAttachments: function WorkerTransport_getAttachments() {
+var promise = new PDFJS.LegacyPromise();
+this.messageHandler.send('GetAttachments', null,
+function transportAttachments(attachments) {
+promise.resolve(attachments);
+}
+);
+return promise;
+},
+startCleanup: function WorkerTransport_startCleanup() {
+this.messageHandler.send('Cleanup', null,
+function endCleanup() {
+for (var i = 0, ii = this.pageCache.length; i < ii; i++) {
+var page = this.pageCache[i];
+if (page) {
+page.destroy();
+}
+}
+this.commonObjs.clear();
+FontLoader.clear();
+}.bind(this)
+);
+}
+};
+return WorkerTransport;
+})();
+/**
+* A PDF document and page is built of many objects. E.g. there are objects
+* for fonts, images, rendering code and such. These objects might get processed
+* inside of a worker. The `PDFObjects` implements some basic functions to
+* manage these objects.
+* @ignore
+*/
+var PDFObjects = (function PDFObjectsClosure() {
+function PDFObjects() {
+this.objs = {};
+}
+PDFObjects.prototype = {
+/**
+* Internal function.
+* Ensures there is an object defined for `objId`.
+*/
+ensureObj: function PDFObjects_ensureObj(objId) {
+if (this.objs[objId]) {
+return this.objs[objId];
+}
+var obj = {
+promise: new LegacyPromise(),
+data: null,
+resolved: false
+};
+this.objs[objId] = obj;
+return obj;
+},
+/**
+* If called *without* callback, this returns the data of `objId` but the
+* object needs to be resolved. If it isn't, this function throws.
+*
+* If called *with* a callback, the callback is called with the data of the
+* object once the object is resolved. That means, if you call this
+* function and the object is already resolved, the callback gets called
+* right away.
+*/
+get: function PDFObjects_get(objId, callback) {
+// If there is a callback, then the get can be async and the object is
+// not required to be resolved right now
+if (callback) {
+this.ensureObj(objId).promise.then(callback);
+return null;
+}
+// If there isn't a callback, the user expects to get the resolved data
+// directly.
+var obj = this.objs[objId];
+// If there isn't an object yet or the object isn't resolved, then the
+// data isn't ready yet!
+if (!obj || !obj.resolved) {
+error('Requesting object that isn\'t resolved yet ' + objId);
+}
+return obj.data;
+},
+/**
+* Resolves the object `objId` with optional `data`.
+*/
+resolve: function PDFObjects_resolve(objId, data) {
+var obj = this.ensureObj(objId);
+obj.resolved = true;
+obj.data = data;
+obj.promise.resolve(data);
+},
+isResolved: function PDFObjects_isResolved(objId) {
+var objs = this.objs;
+if (!objs[objId]) {
+return false;
+} else {
+return objs[objId].resolved;
+}
+},
+hasData: function PDFObjects_hasData(objId) {
+return this.isResolved(objId);
+},
+/**
+* Returns the data of `objId` if object exists, null otherwise.
+*/
+getData: function PDFObjects_getData(objId) {
+var objs = this.objs;
+if (!objs[objId] || !objs[objId].resolved) {
+return null;
+} else {
+return objs[objId].data;
+}
+},
+clear: function PDFObjects_clear() {
+this.objs = {};
+}
+};
+return PDFObjects;
+})();
+/**
+* Allows controlling of the rendering tasks.
+* @class
+*/
+var RenderTask = (function RenderTaskClosure() {
+function RenderTask(internalRenderTask) {
+this.internalRenderTask = internalRenderTask;
+/**
+* Promise for rendering task completion.
+* @type {Promise}
+*/
+this.promise = new PDFJS.LegacyPromise();
+}
+RenderTask.prototype = /** @lends RenderTask.prototype */ {
+/**
+* Cancels the rendering task. If the task is currently rendering it will
+* not be cancelled until graphics pauses with a timeout. The promise that
+* this object extends will resolved when cancelled.
+*/
+cancel: function RenderTask_cancel() {
+this.internalRenderTask.cancel();
+this.promise.reject(new Error('Rendering is cancelled'));
+},
+/**
+* Registers callback to indicate the rendering task completion.
+*
+* @param {function} onFulfilled The callback for the rendering completion.
+* @param {function} onRejected The callback for the rendering failure.
+* @return {Promise} A promise that is resolved after the onFulfilled or
+*                   onRejected callback.
+*/
+then: function RenderTask_then(onFulfilled, onRejected) {
+return this.promise.then(onFulfilled, onRejected);
+}
+};
+return RenderTask;
+})();
+/**
+* For internal use only.
+* @ignore
+*/
+var InternalRenderTask = (function InternalRenderTaskClosure() {
+function InternalRenderTask(callback, params, objs, commonObjs, operatorList,
+pageNumber) {
+this.callback = callback;
+this.params = params;
+this.objs = objs;
+this.commonObjs = commonObjs;
+this.operatorListIdx = null;
+this.operatorList = operatorList;
+this.pageNumber = pageNumber;
+this.running = false;
+this.graphicsReadyCallback = null;
+this.graphicsReady = false;
+this.cancelled = false;
+}
+InternalRenderTask.prototype = {
+initalizeGraphics:
+function InternalRenderTask_initalizeGraphics(transparency) {
+if (this.cancelled) {
+return;
+}
+if (PDFJS.pdfBug && 'StepperManager' in globalScope &&
+globalScope.StepperManager.enabled) {
+this.stepper = globalScope.StepperManager.create(this.pageNumber - 1);
+this.stepper.init(this.operatorList);
+this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();
+}
+var params = this.params;
+this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs,
+this.objs, params.imageLayer);
+this.gfx.beginDrawing(params.viewport, transparency);
+this.operatorListIdx = 0;
+this.graphicsReady = true;
+if (this.graphicsReadyCallback) {
+this.graphicsReadyCallback();
+}
+},
+cancel: function InternalRenderTask_cancel() {
+this.running = false;
+this.cancelled = true;
+this.callback('cancelled');
+},
+operatorListChanged: function InternalRenderTask_operatorListChanged() {
+if (!this.graphicsReady) {
+if (!this.graphicsReadyCallback) {
+this.graphicsReadyCallback = this._continue.bind(this);
+}
+return;
+}
+if (this.stepper) {
+this.stepper.updateOperatorList(this.operatorList);
+}
+if (this.running) {
+return;
+}
+this._continue();
+},
+_continue: function InternalRenderTask__continue() {
+this.running = true;
+if (this.cancelled) {
+return;
+}
+if (this.params.continueCallback) {
+this.params.continueCallback(this._next.bind(this));
+} else {
+this._next();
+}
+},
+_next: function InternalRenderTask__next() {
+if (this.cancelled) {
+return;
+}
+this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList,
+this.operatorListIdx,
+this._continue.bind(this),
+this.stepper);
+if (this.operatorListIdx === this.operatorList.argsArray.length) {
+this.running = false;
+if (this.operatorList.lastChunk) {
+this.gfx.endDrawing();
+this.callback();
+}
+}
+}
+};
+return InternalRenderTask;
+})();
+var Metadata = PDFJS.Metadata = (function MetadataClosure() {
+function fixMetadata(meta) {
+return meta.replace(/>\\376\\377([^<]+)/g, function(all, codes) {
+var bytes = codes.replace(/\\([0-3])([0-7])([0-7])/g,
+function(code, d1, d2, d3) {
+return String.fromCharCode(d1 * 64 + d2 * 8 + d3 * 1);
+});
+var chars = '';
+for (var i = 0; i < bytes.length; i += 2) {
+var code = bytes.charCodeAt(i) * 256 + bytes.charCodeAt(i + 1);
+chars += code >= 32 && code < 127 && code != 60 && code != 62 &&
+code != 38 && false ? String.fromCharCode(code) :
+'&#x' + (0x10000 + code).toString(16).substring(1) + ';';
+}
+return '>' + chars;
+});
+}
+function Metadata(meta) {
+if (typeof meta === 'string') {
+// Ghostscript produces invalid metadata
+meta = fixMetadata(meta);
+var parser = new DOMParser();
+meta = parser.parseFromString(meta, 'application/xml');
+} else if (!(meta instanceof Document)) {
+error('Metadata: Invalid metadata object');
+}
+this.metaDocument = meta;
+this.metadata = {};
+this.parse();
+}
+Metadata.prototype = {
+parse: function Metadata_parse() {
+var doc = this.metaDocument;
+var rdf = doc.documentElement;
+if (rdf.nodeName.toLowerCase() !== 'rdf:rdf') { // Wrapped in <xmpmeta>
+rdf = rdf.firstChild;
+while (rdf && rdf.nodeName.toLowerCase() !== 'rdf:rdf') {
+rdf = rdf.nextSibling;
+}
+}
+var nodeName = (rdf) ? rdf.nodeName.toLowerCase() : null;
+if (!rdf || nodeName !== 'rdf:rdf' || !rdf.hasChildNodes()) {
+return;
+}
+var children = rdf.childNodes, desc, entry, name, i, ii, length, iLength;
+for (i = 0, length = children.length; i < length; i++) {
+desc = children[i];
+if (desc.nodeName.toLowerCase() !== 'rdf:description') {
+continue;
+}
+for (ii = 0, iLength = desc.childNodes.length; ii < iLength; ii++) {
+if (desc.childNodes[ii].nodeName.toLowerCase() !== '#text') {
+entry = desc.childNodes[ii];
+name = entry.nodeName.toLowerCase();
+this.metadata[name] = entry.textContent.trim();
+}
+}
+}
+},
+get: function Metadata_get(name) {
+return this.metadata[name] || null;
+},
+has: function Metadata_has(name) {
+return typeof this.metadata[name] !== 'undefined';
+}
+};
+return Metadata;
+})();
+// <canvas> contexts store most of the state we need natively.
+// However, PDF needs a bit more state, which we store here.
+// Minimal font size that would be used during canvas fillText operations.
+var MIN_FONT_SIZE = 16;
+var MAX_GROUP_SIZE = 4096;
+var COMPILE_TYPE3_GLYPHS = true;
+function createScratchCanvas(width, height) {
+var canvas = document.createElement('canvas');
+canvas.width = width;
+canvas.height = height;
+return canvas;
+}
+function addContextCurrentTransform(ctx) {
+// If the context doesn't expose a `mozCurrentTransform`, add a JS based on.
+if (!ctx.mozCurrentTransform) {
+// Store the original context
+ctx._scaleX = ctx._scaleX || 1.0;
+ctx._scaleY = ctx._scaleY || 1.0;
+ctx._originalSave = ctx.save;
+ctx._originalRestore = ctx.restore;
+ctx._originalRotate = ctx.rotate;
+ctx._originalScale = ctx.scale;
+ctx._originalTranslate = ctx.translate;
+ctx._originalTransform = ctx.transform;
+ctx._originalSetTransform = ctx.setTransform;
+ctx._transformMatrix = [ctx._scaleX, 0, 0, ctx._scaleY, 0, 0];
+ctx._transformStack = [];
+Object.defineProperty(ctx, 'mozCurrentTransform', {
+get: function getCurrentTransform() {
+return this._transformMatrix;
+}
+});
+Object.defineProperty(ctx, 'mozCurrentTransformInverse', {
+get: function getCurrentTransformInverse() {
+// Calculation done using WolframAlpha:
+// http://www.wolframalpha.com/input/?
+//   i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}}
+var m = this._transformMatrix;
+var a = m[0], b = m[1], c = m[2], d = m[3], e = m[4], f = m[5];
+var ad_bc = a * d - b * c;
+var bc_ad = b * c - a * d;
+return [
+d / ad_bc,
+b / bc_ad,
+c / bc_ad,
+a / ad_bc,
+(d * e - c * f) / bc_ad,
+(b * e - a * f) / ad_bc
+];
+}
+});
+ctx.save = function ctxSave() {
+var old = this._transformMatrix;
+this._transformStack.push(old);
+this._transformMatrix = old.slice(0, 6);
+this._originalSave();
+};
+ctx.restore = function ctxRestore() {
+var prev = this._transformStack.pop();
+if (prev) {
+this._transformMatrix = prev;
+this._originalRestore();
+}
+};
+ctx.translate = function ctxTranslate(x, y) {
+var m = this._transformMatrix;
+m[4] = m[0] * x + m[2] * y + m[4];
+m[5] = m[1] * x + m[3] * y + m[5];
+this._originalTranslate(x, y);
+};
+ctx.scale = function ctxScale(x, y) {
+var m = this._transformMatrix;
+m[0] = m[0] * x;
+m[1] = m[1] * x;
+m[2] = m[2] * y;
+m[3] = m[3] * y;
+this._originalScale(x, y);
+};
+ctx.transform = function ctxTransform(a, b, c, d, e, f) {
+var m = this._transformMatrix;
+this._transformMatrix = [
+m[0] * a + m[2] * b,
+m[1] * a + m[3] * b,
+m[0] * c + m[2] * d,
+m[1] * c + m[3] * d,
+m[0] * e + m[2] * f + m[4],
+m[1] * e + m[3] * f + m[5]
+];
+ctx._originalTransform(a, b, c, d, e, f);
+};
+ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) {
+this._transformMatrix = [a, b, c, d, e, f];
+ctx._originalSetTransform(a, b, c, d, e, f);
+};
+ctx.rotate = function ctxRotate(angle) {
+var cosValue = Math.cos(angle);
+var sinValue = Math.sin(angle);
+var m = this._transformMatrix;
+this._transformMatrix = [
+m[0] * cosValue + m[2] * sinValue,
+m[1] * cosValue + m[3] * sinValue,
+m[0] * (-sinValue) + m[2] * cosValue,
+m[1] * (-sinValue) + m[3] * cosValue,
+m[4],
+m[5]
+];
+this._originalRotate(angle);
+};
+}
+}
+var CachedCanvases = (function CachedCanvasesClosure() {
+var cache = {};
+return {
+getCanvas: function CachedCanvases_getCanvas(id, width, height,
+trackTransform) {
+var canvasEntry;
+if (id in cache) {
+canvasEntry = cache[id];
+canvasEntry.canvas.width = width;
+canvasEntry.canvas.height = height;
+// reset canvas transform for emulated mozCurrentTransform, if needed
+canvasEntry.context.setTransform(1, 0, 0, 1, 0, 0);
+} else {
+var canvas = createScratchCanvas(width, height);
+var ctx = canvas.getContext('2d');
+if (trackTransform) {
+addContextCurrentTransform(ctx);
+}
+cache[id] = canvasEntry = {canvas: canvas, context: ctx};
+}
+return canvasEntry;
+},
+clear: function () {
+cache = {};
+}
+};
+})();
+function compileType3Glyph(imgData) {
+var POINT_TO_PROCESS_LIMIT = 1000;
+var width = imgData.width, height = imgData.height;
+var i, j, j0, width1 = width + 1;
+var points = new Uint8Array(width1 * (height + 1));
+var POINT_TYPES =
+new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]);
+// decodes bit-packed mask data
+var lineSize = (width + 7) & ~7, data0 = imgData.data;
+var data = new Uint8Array(lineSize * height), pos = 0, ii;
+for (i = 0, ii = data0.length; i < ii; i++) {
+var mask = 128, elem = data0[i];
+while (mask > 0) {
+data[pos++] = (elem & mask) ? 0 : 255;
+mask >>= 1;
+}
+}
+// finding iteresting points: every point is located between mask pixels,
+// so there will be points of the (width + 1)x(height + 1) grid. Every point
+// will have flags assigned based on neighboring mask pixels:
+//   4 | 8
+//   --P--
+//   2 | 1
+// We are interested only in points with the flags:
+//   - outside corners: 1, 2, 4, 8;
+//   - inside corners: 7, 11, 13, 14;
+//   - and, intersections: 5, 10.
+var count = 0;
+pos = 0;
+if (data[pos] !== 0) {
+points[0] = 1;
+++count;
+}
+for (j = 1; j < width; j++) {
+if (data[pos] !== data[pos + 1]) {
+points[j] = data[pos] ? 2 : 1;
+++count;
+}
+pos++;
+}
+if (data[pos] !== 0) {
+points[j] = 2;
+++count;
+}
+for (i = 1; i < height; i++) {
+pos = i * lineSize;
+j0 = i * width1;
+if (data[pos - lineSize] !== data[pos]) {
+points[j0] = data[pos] ? 1 : 8;
+++count;
+}
+// 'sum' is the position of the current pixel configuration in the 'TYPES'
+// array (in order 8-1-2-4, so we can use '>>2' to shift the column).
+var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0);
+for (j = 1; j < width; j++) {
+sum = (sum >> 2) + (data[pos + 1] ? 4 : 0) +
+(data[pos - lineSize + 1] ? 8 : 0);
+if (POINT_TYPES[sum]) {
+points[j0 + j] = POINT_TYPES[sum];
+++count;
+}
+pos++;
+}
+if (data[pos - lineSize] !== data[pos]) {
+points[j0 + j] = data[pos] ? 2 : 4;
+++count;
+}
+if (count > POINT_TO_PROCESS_LIMIT) {
+return null;
+}
+}
+pos = lineSize * (height - 1);
+j0 = i * width1;
+if (data[pos] !== 0) {
+points[j0] = 8;
+++count;
+}
+for (j = 1; j < width; j++) {
+if (data[pos] !== data[pos + 1]) {
+points[j0 + j] = data[pos] ? 4 : 8;
+++count;
+}
+pos++;
+}
+if (data[pos] !== 0) {
+points[j0 + j] = 4;
+++count;
+}
+if (count > POINT_TO_PROCESS_LIMIT) {
+return null;
+}
+// building outlines
+var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]);
+var outlines = [];
+for (i = 0; count && i <= height; i++) {
+var p = i * width1;
+var end = p + width;
+while (p < end && !points[p]) {
+p++;
+}
+if (p === end) {
+continue;
+}
+var coords = [p % width1, i];
+var type = points[p], p0 = p, pp;
+do {
+var step = steps[type];
+do {
+p += step;
+} while (!points[p]);
+pp = points[p];
+if (pp !== 5 && pp !== 10) {
+// set new direction
+type = pp;
+// delete mark
+points[p] = 0;
+} else { // type is 5 or 10, ie, a crossing
+// set new direction
+type = pp & ((0x33 * type) >> 4);
+// set new type for "future hit"
+points[p] &= (type >> 2 | type << 2);
+}
+coords.push(p % width1);
+coords.push((p / width1) | 0);
+--count;
+} while (p0 !== p);
+outlines.push(coords);
+--i;
+}
+var drawOutline = function(c) {
+c.save();
+// the path shall be painted in [0..1]x[0..1] space
+c.scale(1 / width, -1 / height);
+c.translate(0, -height);
+c.beginPath();
+for (var i = 0, ii = outlines.length; i < ii; i++) {
+var o = outlines[i];
+c.moveTo(o[0], o[1]);
+for (var j = 2, jj = o.length; j < jj; j += 2) {
+c.lineTo(o[j], o[j+1]);
+}
+}
+c.fill();
+c.beginPath();
+c.restore();
+};
+return drawOutline;
+}
+var CanvasExtraState = (function CanvasExtraStateClosure() {
+function CanvasExtraState(old) {
+// Are soft masks and alpha values shapes or opacities?
+this.alphaIsShape = false;
+this.fontSize = 0;
+this.fontSizeScale = 1;
+this.textMatrix = IDENTITY_MATRIX;
+this.fontMatrix = FONT_IDENTITY_MATRIX;
+this.leading = 0;
+// Current point (in user coordinates)
+this.x = 0;
+this.y = 0;
+// Start of text line (in text coordinates)
+this.lineX = 0;
+this.lineY = 0;
+// Character and word spacing
+this.charSpacing = 0;
+this.wordSpacing = 0;
+this.textHScale = 1;
+this.textRenderingMode = TextRenderingMode.FILL;
+this.textRise = 0;
+// Color spaces
+this.fillColorSpace = ColorSpace.singletons.gray;
+this.fillColorSpaceObj = null;
+this.strokeColorSpace = ColorSpace.singletons.gray;
+this.strokeColorSpaceObj = null;
+this.fillColorObj = null;
+this.strokeColorObj = null;
+// Default fore and background colors
+this.fillColor = '#000000';
+this.strokeColor = '#000000';
+// Note: fill alpha applies to all non-stroking operations
+this.fillAlpha = 1;
+this.strokeAlpha = 1;
+this.lineWidth = 1;
+this.activeSMask = null; // nonclonable field (see the save method below)
+this.old = old;
+}
+CanvasExtraState.prototype = {
+clone: function CanvasExtraState_clone() {
+return Object.create(this);
+},
+setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) {
+this.x = x;
+this.y = y;
+}
+};
+return CanvasExtraState;
+})();
+var CanvasGraphics = (function CanvasGraphicsClosure() {
+// Defines the time the executeOperatorList is going to be executing
+// before it stops and shedules a continue of execution.
+var EXECUTION_TIME = 15;
+function CanvasGraphics(canvasCtx, commonObjs, objs, imageLayer) {
+this.ctx = canvasCtx;
+this.current = new CanvasExtraState();
+this.stateStack = [];
+this.pendingClip = null;
+this.pendingEOFill = false;
+this.res = null;
+this.xobjs = null;
+this.commonObjs = commonObjs;
+this.objs = objs;
+this.imageLayer = imageLayer;
+this.groupStack = [];
+this.processingType3 = null;
+// Patterns are painted relative to the initial page/form transform, see pdf
+// spec 8.7.2 NOTE 1.
+this.baseTransform = null;
+this.baseTransformStack = [];
+this.groupLevel = 0;
+this.smaskStack = [];
+this.smaskCounter = 0;
+this.tempSMask = null;
+if (canvasCtx) {
+addContextCurrentTransform(canvasCtx);
+}
+}
+function putBinaryImageData(ctx, imgData) {
+if (typeof ImageData !== 'undefined' && imgData instanceof ImageData) {
+ctx.putImageData(imgData, 0, 0);
+return;
+}
+// Put the image data to the canvas in chunks, rather than putting the
+// whole image at once.  This saves JS memory, because the ImageData object
+// is smaller. It also possibly saves C++ memory within the implementation
+// of putImageData(). (E.g. in Firefox we make two short-lived copies of
+// the data passed to putImageData()). |n| shouldn't be too small, however,
+// because too many putImageData() calls will slow things down.
+//
+// Note: as written, if the last chunk is partial, the putImageData() call
+// will (conceptually) put pixels past the bounds of the canvas.  But
+// that's ok; any such pixels are ignored.
+var height = imgData.height, width = imgData.width;
+var fullChunkHeight = 16;
+var fracChunks = height / fullChunkHeight;
+var fullChunks = Math.floor(fracChunks);
+var totalChunks = Math.ceil(fracChunks);
+var partialChunkHeight = height - fullChunks * fullChunkHeight;
+var chunkImgData = ctx.createImageData(width, fullChunkHeight);
+var srcPos = 0, destPos;
+var src = imgData.data;
+var dest = chunkImgData.data;
+var i, j, thisChunkHeight, elemsInThisChunk;
+// There are multiple forms in which the pixel data can be passed, and
+// imgData.kind tells us which one this is.
+if (imgData.kind === ImageKind.GRAYSCALE_1BPP) {
+// Grayscale, 1 bit per pixel (i.e. black-and-white).
+var srcLength = src.byteLength;
+var dest32 = PDFJS.hasCanvasTypedArrays ? new Uint32Array(dest.buffer) :
+new Uint32ArrayView(dest);
+var dest32DataLength = dest32.length;
+var fullSrcDiff = (width + 7) >> 3;
+var white = 0xFFFFFFFF;
+var black = (PDFJS.isLittleEndian || !PDFJS.hasCanvasTypedArrays) ?
+0xFF000000 : 0x000000FF;
+for (i = 0; i < totalChunks; i++) {
+thisChunkHeight =
+(i < fullChunks) ? fullChunkHeight : partialChunkHeight;
+destPos = 0;
+for (j = 0; j < thisChunkHeight; j++) {
+var srcDiff = srcLength - srcPos;
+var k = 0;
+var kEnd = (srcDiff > fullSrcDiff) ? width : srcDiff * 8 - 7;
+var kEndUnrolled = kEnd & ~7;
+var mask = 0;
+var srcByte = 0;
+for (; k < kEndUnrolled; k += 8) {
+srcByte = src[srcPos++];
+dest32[destPos++] = (srcByte & 128) ? white : black;
+dest32[destPos++] = (srcByte & 64) ? white : black;
+dest32[destPos++] = (srcByte & 32) ? white : black;
+dest32[destPos++] = (srcByte & 16) ? white : black;
+dest32[destPos++] = (srcByte & 8) ? white : black;
+dest32[destPos++] = (srcByte & 4) ? white : black;
+dest32[destPos++] = (srcByte & 2) ? white : black;
+dest32[destPos++] = (srcByte & 1) ? white : black;
+}
+for (; k < kEnd; k++) {
+if (mask === 0) {
+srcByte = src[srcPos++];
+mask = 128;
+}
+dest32[destPos++] = (srcByte & mask) ? white : black;
+mask >>= 1;
+}
+}
+// We ran out of input. Make all remaining pixels transparent.
+while (destPos < dest32DataLength) {
+dest32[destPos++] = 0;
+}
+ctx.putImageData(chunkImgData, 0, i * fullChunkHeight);
+}
+} else if (imgData.kind === ImageKind.RGBA_32BPP) {
+// RGBA, 32-bits per pixel.
+for (i = 0; i < totalChunks; i++) {
+thisChunkHeight =
+(i < fullChunks) ? fullChunkHeight : partialChunkHeight;
+elemsInThisChunk = imgData.width * thisChunkHeight * 4;
+dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));
+srcPos += elemsInThisChunk;
+ctx.putImageData(chunkImgData, 0, i * fullChunkHeight);
+}
+} else if (imgData.kind === ImageKind.RGB_24BPP) {
+// RGB, 24-bits per pixel.
+for (i = 0; i < totalChunks; i++) {
+thisChunkHeight =
+(i < fullChunks) ? fullChunkHeight : partialChunkHeight;
+elemsInThisChunk = imgData.width * thisChunkHeight * 3;
+destPos = 0;
+for (j = 0; j < elemsInThisChunk; j += 3) {
+dest[destPos++] = src[srcPos++];
+dest[destPos++] = src[srcPos++];
+dest[destPos++] = src[srcPos++];
+dest[destPos++] = 255;
+}
+ctx.putImageData(chunkImgData, 0, i * fullChunkHeight);
+}
+} else {
+error('bad image kind: ' + imgData.kind);
+}
+}
+function putBinaryImageMask(ctx, imgData) {
+var height = imgData.height, width = imgData.width;
+var fullChunkHeight = 16;
+var fracChunks = height / fullChunkHeight;
+var fullChunks = Math.floor(fracChunks);
+var totalChunks = Math.ceil(fracChunks);
+var partialChunkHeight = height - fullChunks * fullChunkHeight;
+var chunkImgData = ctx.createImageData(width, fullChunkHeight);
+var srcPos = 0;
+var src = imgData.data;
+var dest = chunkImgData.data;
+for (var i = 0; i < totalChunks; i++) {
+var thisChunkHeight =
+(i < fullChunks) ? fullChunkHeight : partialChunkHeight;
+// Expand the mask so it can be used by the canvas.  Any required
+// inversion has already been handled.
+var destPos = 3; // alpha component offset
+for (var j = 0; j < thisChunkHeight; j++) {
+var mask = 0;
+for (var k = 0; k < width; k++) {
+if (!mask) {
+var elem = src[srcPos++];
+mask = 128;
+}
+dest[destPos] = (elem & mask) ? 0 : 255;
+destPos += 4;
+mask >>= 1;
+}
+}
+ctx.putImageData(chunkImgData, 0, i * fullChunkHeight);
+}
+}
+function copyCtxState(sourceCtx, destCtx) {
+var properties = ['strokeStyle', 'fillStyle', 'fillRule', 'globalAlpha',
+'lineWidth', 'lineCap', 'lineJoin', 'miterLimit',
+'globalCompositeOperation', 'font'];
+for (var i = 0, ii = properties.length; i < ii; i++) {
+var property = properties[i];
+if (property in sourceCtx) {
+destCtx[property] = sourceCtx[property];
+}
+}
+if ('setLineDash' in sourceCtx) {
+destCtx.setLineDash(sourceCtx.getLineDash());
+destCtx.lineDashOffset =  sourceCtx.lineDashOffset;
+} else if ('mozDash' in sourceCtx) {
+destCtx.mozDash = sourceCtx.mozDash;
+destCtx.mozDashOffset = sourceCtx.mozDashOffset;
+}
+}
+function genericComposeSMask(maskCtx, layerCtx, width, height,
+subtype, backdrop) {
+var addBackdropFn;
+if (backdrop) {
+addBackdropFn = function (r0, g0, b0, bytes) {
+var length = bytes.length;
+for (var i = 3; i < length; i += 4) {
+var alpha = bytes[i] / 255;
+if (alpha === 0) {
+bytes[i - 3] = r0;
+bytes[i - 2] = g0;
+bytes[i - 1] = b0;
+} else if (alpha < 1) {
+var alpha_ = 1 - alpha;
+bytes[i - 3] = (bytes[i - 3] * alpha + r0 * alpha_) | 0;
+bytes[i - 2] = (bytes[i - 2] * alpha + g0 * alpha_) | 0;
+bytes[i - 1] = (bytes[i - 1] * alpha + b0 * alpha_) | 0;
+}
+}
+}.bind(null, backdrop[0], backdrop[1], backdrop[2]);
+} else {
+addBackdropFn = function () {};
+}
+var composeFn;
+if (subtype === 'Luminosity') {
+composeFn = function (maskDataBytes, layerDataBytes) {
+var length = maskDataBytes.length;
+for (var i = 3; i < length; i += 4) {
+var y = ((maskDataBytes[i - 3] * 77) +     // * 0.3 / 255 * 0x10000
+(maskDataBytes[i - 2] * 152) +    // * 0.59 ....
+(maskDataBytes[i - 1] * 28)) | 0; // * 0.11 ....
+layerDataBytes[i] = (layerDataBytes[i] * y) >> 16;
+}
+};
+} else {
+composeFn = function (maskDataBytes, layerDataBytes) {
+var length = maskDataBytes.length;
+for (var i = 3; i < length; i += 4) {
+var alpha = maskDataBytes[i];
+layerDataBytes[i] = (layerDataBytes[i] * alpha / 255) | 0;
+}
+};
+}
+// processing image in chunks to save memory
+var PIXELS_TO_PROCESS = 65536;
+var chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width));
+for (var row = 0; row < height; row += chunkSize) {
+var chunkHeight = Math.min(chunkSize, height - row);
+var maskData = maskCtx.getImageData(0, row, width, chunkHeight);
+var layerData = layerCtx.getImageData(0, row, width, chunkHeight);
+addBackdropFn(maskData.data);
+composeFn(maskData.data, layerData.data);
+maskCtx.putImageData(layerData, 0, row);
+}
+}
+function composeSMask(ctx, smask, layerCtx) {
+var mask = smask.canvas;
+var maskCtx = smask.context;
+ctx.setTransform(smask.scaleX, 0, 0, smask.scaleY,
+smask.offsetX, smask.offsetY);
+var backdrop;
+if (smask.backdrop) {
+var cs = smask.colorSpace || ColorSpace.singletons.rgb;
+backdrop = cs.getRgb(smask.backdrop, 0);
+}
+if (WebGLUtils.isEnabled) {
+var composed = WebGLUtils.composeSMask(layerCtx.canvas, mask,
+{subtype: smask.subtype, backdrop: backdrop});
+ctx.setTransform(1, 0, 0, 1, 0, 0);
+ctx.drawImage(composed, smask.offsetX, smask.offsetY);
+return;
+}
+genericComposeSMask(maskCtx, layerCtx, mask.width, mask.height,
+smask.subtype, backdrop);
+ctx.drawImage(mask, 0, 0);
+}
+var LINE_CAP_STYLES = ['butt', 'round', 'square'];
+var LINE_JOIN_STYLES = ['miter', 'round', 'bevel'];
+var NORMAL_CLIP = {};
+var EO_CLIP = {};
+CanvasGraphics.prototype = {
+beginDrawing: function CanvasGraphics_beginDrawing(viewport, transparency) {
+// For pdfs that use blend modes we have to clear the canvas else certain
+// blend modes can look wrong since we'd be blending with a white
+// backdrop. The problem with a transparent backdrop though is we then
+// don't get sub pixel anti aliasing on text, so we fill with white if
+// we can.
+var width = this.ctx.canvas.width;
+var height = this.ctx.canvas.height;
+if (transparency) {
+this.ctx.clearRect(0, 0, width, height);
+} else {
+this.ctx.mozOpaque = true;
+this.ctx.save();
+this.ctx.fillStyle = 'rgb(255, 255, 255)';
+this.ctx.fillRect(0, 0, width, height);
+this.ctx.restore();
+}
+var transform = viewport.transform;
+this.ctx.save();
+this.ctx.transform.apply(this.ctx, transform);
+this.baseTransform = this.ctx.mozCurrentTransform.slice();
+if (this.imageLayer) {
+this.imageLayer.beginLayout();
+}
+},
+executeOperatorList: function CanvasGraphics_executeOperatorList(
+operatorList,
+executionStartIdx, continueCallback,
+stepper) {
+var argsArray = operatorList.argsArray;
+var fnArray = operatorList.fnArray;
+var i = executionStartIdx || 0;
+var argsArrayLen = argsArray.length;
+// Sometimes the OperatorList to execute is empty.
+if (argsArrayLen == i) {
+return i;
+}
+var endTime = Date.now() + EXECUTION_TIME;
+var commonObjs = this.commonObjs;
+var objs = this.objs;
+var fnId;
+var deferred = Promise.resolve();
+while (true) {
+if (stepper && i === stepper.nextBreakPoint) {
+stepper.breakIt(i, continueCallback);
+return i;
+}
+fnId = fnArray[i];
+if (fnId !== OPS.dependency) {
+this[fnId].apply(this, argsArray[i]);
+} else {
+var deps = argsArray[i];
+for (var n = 0, nn = deps.length; n < nn; n++) {
+var depObjId = deps[n];
+var common = depObjId.substring(0, 2) == 'g_';
+// If the promise isn't resolved yet, add the continueCallback
+// to the promise and bail out.
+if (!common && !objs.isResolved(depObjId)) {
+objs.get(depObjId, continueCallback);
+return i;
+}
+if (common && !commonObjs.isResolved(depObjId)) {
+commonObjs.get(depObjId, continueCallback);
+return i;
+}
+}
+}
+i++;
+// If the entire operatorList was executed, stop as were done.
+if (i == argsArrayLen) {
+return i;
+}
+// If the execution took longer then a certain amount of time, schedule
+// to continue exeution after a short delay.
+// However, this is only possible if a 'continueCallback' is passed in.
+if (continueCallback && Date.now() > endTime) {
+deferred.then(continueCallback);
+return i;
+}
+// If the operatorList isn't executed completely yet OR the execution
+// time was short enough, do another execution round.
+}
+},
+endDrawing: function CanvasGraphics_endDrawing() {
+this.ctx.restore();
+CachedCanvases.clear();
+WebGLUtils.clear();
+if (this.imageLayer) {
+this.imageLayer.endLayout();
+}
+},
+// Graphics state
+setLineWidth: function CanvasGraphics_setLineWidth(width) {
+this.current.lineWidth = width;
+this.ctx.lineWidth = width;
+},
+setLineCap: function CanvasGraphics_setLineCap(style) {
+this.ctx.lineCap = LINE_CAP_STYLES[style];
+},
+setLineJoin: function CanvasGraphics_setLineJoin(style) {
+this.ctx.lineJoin = LINE_JOIN_STYLES[style];
+},
+setMiterLimit: function CanvasGraphics_setMiterLimit(limit) {
+this.ctx.miterLimit = limit;
+},
+setDash: function CanvasGraphics_setDash(dashArray, dashPhase) {
+var ctx = this.ctx;
+if ('setLineDash' in ctx) {
+ctx.setLineDash(dashArray);
+ctx.lineDashOffset = dashPhase;
+} else {
+ctx.mozDash = dashArray;
+ctx.mozDashOffset = dashPhase;
+}
+},
+setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) {
+// Maybe if we one day fully support color spaces this will be important
+// for now we can ignore.
+// TODO set rendering intent?
+},
+setFlatness: function CanvasGraphics_setFlatness(flatness) {
+// There's no way to control this with canvas, but we can safely ignore.
+// TODO set flatness?
+},
+setGState: function CanvasGraphics_setGState(states) {
+for (var i = 0, ii = states.length; i < ii; i++) {
+var state = states[i];
+var key = state[0];
+var value = state[1];
+switch (key) {
+case 'LW':
+this.setLineWidth(value);
+break;
+case 'LC':
+this.setLineCap(value);
+break;
+case 'LJ':
+this.setLineJoin(value);
+break;
+case 'ML':
+this.setMiterLimit(value);
+break;
+case 'D':
+this.setDash(value[0], value[1]);
+break;
+case 'RI':
+this.setRenderingIntent(value);
+break;
+case 'FL':
+this.setFlatness(value);
+break;
+case 'Font':
+this.setFont(value[0], value[1]);
+break;
+case 'CA':
+this.current.strokeAlpha = state[1];
+break;
+case 'ca':
+this.current.fillAlpha = state[1];
+this.ctx.globalAlpha = state[1];
+break;
+case 'BM':
+if (value && value.name && (value.name !== 'Normal')) {
+var mode = value.name.replace(/([A-Z])/g,
+function(c) {
+return '-' + c.toLowerCase();
+}
+).substring(1);
+this.ctx.globalCompositeOperation = mode;
+if (this.ctx.globalCompositeOperation !== mode) {
+warn('globalCompositeOperation "' + mode +
+'" is not supported');
+}
+} else {
+this.ctx.globalCompositeOperation = 'source-over';
+}
+break;
+case 'SMask':
+if (this.current.activeSMask) {
+this.endSMaskGroup();
+}
+this.current.activeSMask = value ? this.tempSMask : null;
+if (this.current.activeSMask) {
+this.beginSMaskGroup();
+}
+this.tempSMask = null;
+break;
+}
+}
+},
+beginSMaskGroup: function CanvasGraphics_beginSMaskGroup() {
+var activeSMask = this.current.activeSMask;
+var drawnWidth = activeSMask.canvas.width;
+var drawnHeight = activeSMask.canvas.height;
+var cacheId = 'smaskGroupAt' + this.groupLevel;
+var scratchCanvas = CachedCanvases.getCanvas(
+cacheId, drawnWidth, drawnHeight, true);
+var currentCtx = this.ctx;
+var currentTransform = currentCtx.mozCurrentTransform;
+this.ctx.save();
+var groupCtx = scratchCanvas.context;
+groupCtx.scale(1 / activeSMask.scaleX, 1 / activeSMask.scaleY);
+groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY);
+groupCtx.transform.apply(groupCtx, currentTransform);
+copyCtxState(currentCtx, groupCtx);
+this.ctx = groupCtx;
+this.setGState([
+['BM', 'Normal'],
+['ca', 1],
+['CA', 1]
+]);
+this.groupStack.push(currentCtx);
+this.groupLevel++;
+},
+endSMaskGroup: function CanvasGraphics_endSMaskGroup() {
+var groupCtx = this.ctx;
+this.groupLevel--;
+this.ctx = this.groupStack.pop();
+composeSMask(this.ctx, this.current.activeSMask, groupCtx);
+this.ctx.restore();
+},
+save: function CanvasGraphics_save() {
+this.ctx.save();
+var old = this.current;
+this.stateStack.push(old);
+this.current = old.clone();
+if (this.current.activeSMask) {
+this.current.activeSMask = null;
+}
+},
+restore: function CanvasGraphics_restore() {
+var prev = this.stateStack.pop();
+if (prev) {
+if (this.current.activeSMask) {
+this.endSMaskGroup();
+}
+this.current = prev;
+this.ctx.restore();
+}
+},
+transform: function CanvasGraphics_transform(a, b, c, d, e, f) {
+this.ctx.transform(a, b, c, d, e, f);
+},
+// Path
+moveTo: function CanvasGraphics_moveTo(x, y) {
+this.ctx.moveTo(x, y);
+this.current.setCurrentPoint(x, y);
+},
+lineTo: function CanvasGraphics_lineTo(x, y) {
+this.ctx.lineTo(x, y);
+this.current.setCurrentPoint(x, y);
+},
+curveTo: function CanvasGraphics_curveTo(x1, y1, x2, y2, x3, y3) {
+this.ctx.bezierCurveTo(x1, y1, x2, y2, x3, y3);
+this.current.setCurrentPoint(x3, y3);
+},
+curveTo2: function CanvasGraphics_curveTo2(x2, y2, x3, y3) {
+var current = this.current;
+this.ctx.bezierCurveTo(current.x, current.y, x2, y2, x3, y3);
+current.setCurrentPoint(x3, y3);
+},
+curveTo3: function CanvasGraphics_curveTo3(x1, y1, x3, y3) {
+this.curveTo(x1, y1, x3, y3, x3, y3);
+this.current.setCurrentPoint(x3, y3);
+},
+closePath: function CanvasGraphics_closePath() {
+this.ctx.closePath();
+},
+rectangle: function CanvasGraphics_rectangle(x, y, width, height) {
+if (width === 0) {
+width = this.getSinglePixelWidth();
+}
+if (height === 0) {
+height = this.getSinglePixelWidth();
+}
+this.ctx.rect(x, y, width, height);
+},
+stroke: function CanvasGraphics_stroke(consumePath) {
+consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
+var ctx = this.ctx;
+var strokeColor = this.current.strokeColor;
+if (this.current.lineWidth === 0) {
+ctx.lineWidth = this.getSinglePixelWidth();
+}
+// For stroke we want to temporarily change the global alpha to the
+// stroking alpha.
+ctx.globalAlpha = this.current.strokeAlpha;
+if (strokeColor && strokeColor.hasOwnProperty('type') &&
+strokeColor.type === 'Pattern') {
+// for patterns, we transform to pattern space, calculate
+// the pattern, call stroke, and restore to user space
+ctx.save();
+ctx.strokeStyle = strokeColor.getPattern(ctx, this);
+ctx.stroke();
+ctx.restore();
+} else {
+ctx.stroke();
+}
+if (consumePath) {
+this.consumePath();
+}
+// Restore the global alpha to the fill alpha
+ctx.globalAlpha = this.current.fillAlpha;
+},
+closeStroke: function CanvasGraphics_closeStroke() {
+this.closePath();
+this.stroke();
+},
+fill: function CanvasGraphics_fill(consumePath) {
+consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
+var ctx = this.ctx;
+var fillColor = this.current.fillColor;
+var needRestore = false;
+if (fillColor && fillColor.hasOwnProperty('type') &&
+fillColor.type === 'Pattern') {
+ctx.save();
+ctx.fillStyle = fillColor.getPattern(ctx, this);
+needRestore = true;
+}
+if (this.pendingEOFill) {
+if ('mozFillRule' in this.ctx) {
+this.ctx.mozFillRule = 'evenodd';
+this.ctx.fill();
+this.ctx.mozFillRule = 'nonzero';
+} else {
+try {
+this.ctx.fill('evenodd');
+} catch (ex) {
+// shouldn't really happen, but browsers might think differently
+this.ctx.fill();
+}
+}
+this.pendingEOFill = false;
+} else {
+this.ctx.fill();
+}
+if (needRestore) {
+ctx.restore();
+}
+if (consumePath) {
+this.consumePath();
+}
+},
+eoFill: function CanvasGraphics_eoFill() {
+this.pendingEOFill = true;
+this.fill();
+},
+fillStroke: function CanvasGraphics_fillStroke() {
+this.fill(false);
+this.stroke(false);
+this.consumePath();
+},
+eoFillStroke: function CanvasGraphics_eoFillStroke() {
+this.pendingEOFill = true;
+this.fillStroke();
+},
+closeFillStroke: function CanvasGraphics_closeFillStroke() {
+this.closePath();
+this.fillStroke();
+},
+closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() {
+this.pendingEOFill = true;
+this.closePath();
+this.fillStroke();
+},
+endPath: function CanvasGraphics_endPath() {
+this.consumePath();
+},
+// Clipping
+clip: function CanvasGraphics_clip() {
+this.pendingClip = NORMAL_CLIP;
+},
+eoClip: function CanvasGraphics_eoClip() {
+this.pendingClip = EO_CLIP;
+},
+// Text
+beginText: function CanvasGraphics_beginText() {
+this.current.textMatrix = IDENTITY_MATRIX;
+this.current.x = this.current.lineX = 0;
+this.current.y = this.current.lineY = 0;
+},
+endText: function CanvasGraphics_endText() {
+if (!('pendingTextPaths' in this)) {
+this.ctx.beginPath();
+return;
+}
+var paths = this.pendingTextPaths;
+var ctx = this.ctx;
+ctx.save();
+ctx.beginPath();
+for (var i = 0; i < paths.length; i++) {
+var path = paths[i];
+ctx.setTransform.apply(ctx, path.transform);
+ctx.translate(path.x, path.y);
+path.addToPath(ctx, path.fontSize);
+}
+ctx.restore();
+ctx.clip();
+ctx.beginPath();
+delete this.pendingTextPaths;
+},
+setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) {
+this.current.charSpacing = spacing;
+},
+setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) {
+this.current.wordSpacing = spacing;
+},
+setHScale: function CanvasGraphics_setHScale(scale) {
+this.current.textHScale = scale / 100;
+},
+setLeading: function CanvasGraphics_setLeading(leading) {
+this.current.leading = -leading;
+},
+setFont: function CanvasGraphics_setFont(fontRefName, size) {
+var fontObj = this.commonObjs.get(fontRefName);
+var current = this.current;
+if (!fontObj) {
+error('Can\'t find font for ' + fontRefName);
+}
+current.fontMatrix = (fontObj.fontMatrix ?
+fontObj.fontMatrix : FONT_IDENTITY_MATRIX);
+// A valid matrix needs all main diagonal elements to be non-zero
+// This also ensures we bypass FF bugzilla bug #719844.
+if (current.fontMatrix[0] === 0 ||
+current.fontMatrix[3] === 0) {
+warn('Invalid font matrix for font ' + fontRefName);
+}
+// The spec for Tf (setFont) says that 'size' specifies the font 'scale',
+// and in some docs this can be negative (inverted x-y axes).
+if (size < 0) {
+size = -size;
+current.fontDirection = -1;
+} else {
+current.fontDirection = 1;
+}
+this.current.font = fontObj;
+this.current.fontSize = size;
+if (fontObj.coded) {
+return; // we don't need ctx.font for Type3 fonts
+}
+var name = fontObj.loadedName || 'sans-serif';
+var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') :
+(fontObj.bold ? 'bold' : 'normal');
+var italic = fontObj.italic ? 'italic' : 'normal';
+var typeface = '"' + name + '", ' + fontObj.fallbackName;
+// Some font backends cannot handle fonts below certain size.
+// Keeping the font at minimal size and using the fontSizeScale to change
+// the current transformation matrix before the fillText/strokeText.
+// See https://bugzilla.mozilla.org/show_bug.cgi?id=726227
+var browserFontSize = size >= MIN_FONT_SIZE ? size : MIN_FONT_SIZE;
+this.current.fontSizeScale = browserFontSize != MIN_FONT_SIZE ? 1.0 :
+size / MIN_FONT_SIZE;
+var rule = italic + ' ' + bold + ' ' + browserFontSize + 'px ' + typeface;
+this.ctx.font = rule;
+},
+setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) {
+this.current.textRenderingMode = mode;
+},
+setTextRise: function CanvasGraphics_setTextRise(rise) {
+this.current.textRise = rise;
+},
+moveText: function CanvasGraphics_moveText(x, y) {
+this.current.x = this.current.lineX += x;
+this.current.y = this.current.lineY += y;
+},
+setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) {
+this.setLeading(-y);
+this.moveText(x, y);
+},
+setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) {
+this.current.textMatrix = [a, b, c, d, e, f];
+this.current.x = this.current.lineX = 0;
+this.current.y = this.current.lineY = 0;
+},
+nextLine: function CanvasGraphics_nextLine() {
+this.moveText(0, this.current.leading);
+},
+applyTextTransforms: function CanvasGraphics_applyTextTransforms() {
+var ctx = this.ctx;
+var current = this.current;
+ctx.transform.apply(ctx, current.textMatrix);
+ctx.translate(current.x, current.y + current.textRise);
+if (current.fontDirection > 0) {
+ctx.scale(current.textHScale, -1);
+} else {
+ctx.scale(-current.textHScale, 1);
+}
+},
+paintChar: function (character, x, y) {
+var ctx = this.ctx;
+var current = this.current;
+var font = current.font;
+var fontSize = current.fontSize / current.fontSizeScale;
+var textRenderingMode = current.textRenderingMode;
+var fillStrokeMode = textRenderingMode &
+TextRenderingMode.FILL_STROKE_MASK;
+var isAddToPathSet = !!(textRenderingMode &
+TextRenderingMode.ADD_TO_PATH_FLAG);
+var addToPath;
+if (font.disableFontFace || isAddToPathSet) {
+addToPath = font.getPathGenerator(this.commonObjs, character);
+}
+if (font.disableFontFace) {
+ctx.save();
+ctx.translate(x, y);
+ctx.beginPath();
+addToPath(ctx, fontSize);
+if (fillStrokeMode === TextRenderingMode.FILL ||
+fillStrokeMode === TextRenderingMode.FILL_STROKE) {
+ctx.fill();
+}
+if (fillStrokeMode === TextRenderingMode.STROKE ||
+fillStrokeMode === TextRenderingMode.FILL_STROKE) {
+ctx.stroke();
+}
+ctx.restore();
+} else {
+if (fillStrokeMode === TextRenderingMode.FILL ||
+fillStrokeMode === TextRenderingMode.FILL_STROKE) {
+ctx.fillText(character, x, y);
+}
+if (fillStrokeMode === TextRenderingMode.STROKE ||
+fillStrokeMode === TextRenderingMode.FILL_STROKE) {
+ctx.strokeText(character, x, y);
+}
+}
+if (isAddToPathSet) {
+var paths = this.pendingTextPaths || (this.pendingTextPaths = []);
+paths.push({
+transform: ctx.mozCurrentTransform,
+x: x,
+y: y,
+fontSize: fontSize,
+addToPath: addToPath
+});
+}
+},
+get isFontSubpixelAAEnabled() {
+// Checks if anti-aliasing is enabled when scaled text is painted.
+// On Windows GDI scaled fonts looks bad.
+var ctx = document.createElement('canvas').getContext('2d');
+ctx.scale(1.5, 1);
+ctx.fillText('I', 0, 10);
+var data = ctx.getImageData(0, 0, 10, 10).data;
+var enabled = false;
+for (var i = 3; i < data.length; i += 4) {
+if (data[i] > 0 && data[i] < 255) {
+enabled = true;
+break;
+}
+}
+return shadow(this, 'isFontSubpixelAAEnabled', enabled);
+},
+showText: function CanvasGraphics_showText(glyphs) {
+var ctx = this.ctx;
+var current = this.current;
+var font = current.font;
+var fontSize = current.fontSize;
+var fontSizeScale = current.fontSizeScale;
+var charSpacing = current.charSpacing;
+var wordSpacing = current.wordSpacing;
+var textHScale = current.textHScale * current.fontDirection;
+var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX;
+var glyphsLength = glyphs.length;
+var vertical = font.vertical;
+var defaultVMetrics = font.defaultVMetrics;
+var i, glyph, width;
+if (fontSize === 0) {
+return;
+}
+// Type3 fonts - each glyph is a "mini-PDF"
+if (font.coded) {
+ctx.save();
+ctx.transform.apply(ctx, current.textMatrix);
+ctx.translate(current.x, current.y);
+ctx.scale(textHScale, 1);
+for (i = 0; i < glyphsLength; ++i) {
+glyph = glyphs[i];
+if (glyph === null) {
+// word break
+this.ctx.translate(wordSpacing, 0);
+current.x += wordSpacing * textHScale;
+continue;
+}
+this.processingType3 = glyph;
+this.save();
+ctx.scale(fontSize, fontSize);
+ctx.transform.apply(ctx, fontMatrix);
+this.executeOperatorList(glyph.operatorList);
+this.restore();
+var transformed = Util.applyTransform([glyph.width, 0], fontMatrix);
+width = ((transformed[0] * fontSize + charSpacing) *
+current.fontDirection);
+ctx.translate(width, 0);
+current.x += width * textHScale;
+}
+ctx.restore();
+this.processingType3 = null;
+} else {
+ctx.save();
+this.applyTextTransforms();
+var lineWidth = current.lineWidth;
+var a1 = current.textMatrix[0], b1 = current.textMatrix[1];
+var scale = Math.sqrt(a1 * a1 + b1 * b1);
+if (scale === 0 || lineWidth === 0) {
+lineWidth = this.getSinglePixelWidth();
+} else {
+lineWidth /= scale;
+}
+if (fontSizeScale != 1.0) {
+ctx.scale(fontSizeScale, fontSizeScale);
+lineWidth /= fontSizeScale;
+}
+ctx.lineWidth = lineWidth;
+var x = 0;
+for (i = 0; i < glyphsLength; ++i) {
+glyph = glyphs[i];
+if (glyph === null) {
+// word break
+x += current.fontDirection * wordSpacing;
+continue;
+}
+var restoreNeeded = false;
+var character = glyph.fontChar;
+var vmetric = glyph.vmetric || defaultVMetrics;
+if (vertical) {
+var vx = glyph.vmetric ? vmetric[1] : glyph.width * 0.5;
+vx = -vx * fontSize * current.fontMatrix[0];
+var vy = vmetric[2] * fontSize * current.fontMatrix[0];
+}
+width = vmetric ? -vmetric[0] : glyph.width;
+var charWidth = width * fontSize * current.fontMatrix[0] +
+charSpacing * current.fontDirection;
+var accent = glyph.accent;
+var scaledX, scaledY, scaledAccentX, scaledAccentY;
+if (vertical) {
+scaledX = vx / fontSizeScale;
+scaledY = (x + vy) / fontSizeScale;
+} else {
+scaledX = x / fontSizeScale;
+scaledY = 0;
+}
+if (font.remeasure && width > 0 && this.isFontSubpixelAAEnabled) {
+// some standard fonts may not have the exact width, trying to
+// rescale per character
+var measuredWidth = ctx.measureText(character).width * 1000 /
+current.fontSize * current.fontSizeScale;
+var characterScaleX = width / measuredWidth;
+restoreNeeded = true;
+ctx.save();
+ctx.scale(characterScaleX, 1);
+scaledX /= characterScaleX;
+if (accent) {
+scaledAccentX /= characterScaleX;
+}
+}
+this.paintChar(character, scaledX, scaledY);
+if (accent) {
+scaledAccentX = scaledX + accent.offset.x / fontSizeScale;
+scaledAccentY = scaledY - accent.offset.y / fontSizeScale;
+this.paintChar(accent.fontChar, scaledAccentX, scaledAccentY);
+}
+x += charWidth;
+if (restoreNeeded) {
+ctx.restore();
+}
+}
+if (vertical) {
+current.y -= x * textHScale;
+} else {
+current.x += x * textHScale;
+}
+ctx.restore();
+}
+},
+showSpacedText: function CanvasGraphics_showSpacedText(arr) {
+var current = this.current;
+var font = current.font;
+var fontSize = current.fontSize;
+// TJ array's number is independent from fontMatrix
+var textHScale = current.textHScale * 0.001 * current.fontDirection;
+var arrLength = arr.length;
+var vertical = font.vertical;
+for (var i = 0; i < arrLength; ++i) {
+var e = arr[i];
+if (isNum(e)) {
+var spacingLength = -e * fontSize * textHScale;
+if (vertical) {
+current.y += spacingLength;
+} else {
+current.x += spacingLength;
+}
+} else {
+this.showText(e);
+}
+}
+},
+nextLineShowText: function CanvasGraphics_nextLineShowText(text) {
+this.nextLine();
+this.showText(text);
+},
+nextLineSetSpacingShowText:
+function CanvasGraphics_nextLineSetSpacingShowText(wordSpacing,
+charSpacing,
+text) {
+this.setWordSpacing(wordSpacing);
+this.setCharSpacing(charSpacing);
+this.nextLineShowText(text);
+},
+// Type3 fonts
+setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) {
+// We can safely ignore this since the width should be the same
+// as the width in the Widths array.
+},
+setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(xWidth,
+yWidth,
+llx,
+lly,
+urx,
+ury) {
+// TODO According to the spec we're also suppose to ignore any operators
+// that set color or include images while processing this type3 font.
+this.rectangle(llx, lly, urx - llx, ury - lly);
+this.clip();
+this.endPath();
+},
+// Color
+setStrokeColorSpace: function CanvasGraphics_setStrokeColorSpace(raw) {
+this.current.strokeColorSpace = ColorSpace.fromIR(raw);
+},
+setFillColorSpace: function CanvasGraphics_setFillColorSpace(raw) {
+this.current.fillColorSpace = ColorSpace.fromIR(raw);
+},
+setStrokeColor: function CanvasGraphics_setStrokeColor(/*...*/) {
+var cs = this.current.strokeColorSpace;
+var rgbColor = cs.getRgb(arguments, 0);
+var color = Util.makeCssRgb(rgbColor);
+this.ctx.strokeStyle = color;
+this.current.strokeColor = color;
+},
+getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR, cs) {
+var pattern;
+if (IR[0] == 'TilingPattern') {
+var args = IR[1];
+var base = cs.base;
+var color;
+if (base) {
+color = base.getRgb(args, 0);
+}
+pattern = new TilingPattern(IR, color, this.ctx, this.objs,
+this.commonObjs, this.baseTransform);
+} else {
+pattern = getShadingPatternFromIR(IR);
+}
+return pattern;
+},
+setStrokeColorN: function CanvasGraphics_setStrokeColorN(/*...*/) {
+var cs = this.current.strokeColorSpace;
+if (cs.name == 'Pattern') {
+this.current.strokeColor = this.getColorN_Pattern(arguments, cs);
+} else {
+this.setStrokeColor.apply(this, arguments);
+}
+},
+setFillColor: function CanvasGraphics_setFillColor(/*...*/) {
+var cs = this.current.fillColorSpace;
+var rgbColor = cs.getRgb(arguments, 0);
+var color = Util.makeCssRgb(rgbColor);
+this.ctx.fillStyle = color;
+this.current.fillColor = color;
+},
+setFillColorN: function CanvasGraphics_setFillColorN(/*...*/) {
+var cs = this.current.fillColorSpace;
+if (cs.name == 'Pattern') {
+this.current.fillColor = this.getColorN_Pattern(arguments, cs);
+} else {
+this.setFillColor.apply(this, arguments);
+}
+},
+setStrokeGray: function CanvasGraphics_setStrokeGray(gray) {
+this.current.strokeColorSpace = ColorSpace.singletons.gray;
+var rgbColor = this.current.strokeColorSpace.getRgb(arguments, 0);
+var color = Util.makeCssRgb(rgbColor);
+this.ctx.strokeStyle = color;
+this.current.strokeColor = color;
+},
+setFillGray: function CanvasGraphics_setFillGray(gray) {
+this.current.fillColorSpace = ColorSpace.singletons.gray;
+var rgbColor = this.current.fillColorSpace.getRgb(arguments, 0);
+var color = Util.makeCssRgb(rgbColor);
+this.ctx.fillStyle = color;
+this.current.fillColor = color;
+},
+setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) {
+this.current.strokeColorSpace = ColorSpace.singletons.rgb;
+var rgbColor = this.current.strokeColorSpace.getRgb(arguments, 0);
+var color = Util.makeCssRgb(rgbColor);
+this.ctx.strokeStyle = color;
+this.current.strokeColor = color;
+},
+setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) {
+this.current.fillColorSpace = ColorSpace.singletons.rgb;
+var rgbColor = this.current.fillColorSpace.getRgb(arguments, 0);
+var color = Util.makeCssRgb(rgbColor);
+this.ctx.fillStyle = color;
+this.current.fillColor = color;
+},
+setStrokeCMYKColor: function CanvasGraphics_setStrokeCMYKColor(c, m, y, k) {
+this.current.strokeColorSpace = ColorSpace.singletons.cmyk;
+var color = Util.makeCssCmyk(arguments);
+this.ctx.strokeStyle = color;
+this.current.strokeColor = color;
+},
+setFillCMYKColor: function CanvasGraphics_setFillCMYKColor(c, m, y, k) {
+this.current.fillColorSpace = ColorSpace.singletons.cmyk;
+var color = Util.makeCssCmyk(arguments);
+this.ctx.fillStyle = color;
+this.current.fillColor = color;
+},
+shadingFill: function CanvasGraphics_shadingFill(patternIR) {
+var ctx = this.ctx;
+this.save();
+var pattern = getShadingPatternFromIR(patternIR);
+ctx.fillStyle = pattern.getPattern(ctx, this, true);
+var inv = ctx.mozCurrentTransformInverse;
+if (inv) {
+var canvas = ctx.canvas;
+var width = canvas.width;
+var height = canvas.height;
+var bl = Util.applyTransform([0, 0], inv);
+var br = Util.applyTransform([0, height], inv);
+var ul = Util.applyTransform([width, 0], inv);
+var ur = Util.applyTransform([width, height], inv);
+var x0 = Math.min(bl[0], br[0], ul[0], ur[0]);
+var y0 = Math.min(bl[1], br[1], ul[1], ur[1]);
+var x1 = Math.max(bl[0], br[0], ul[0], ur[0]);
+var y1 = Math.max(bl[1], br[1], ul[1], ur[1]);
+this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0);
+} else {
+// HACK to draw the gradient onto an infinite rectangle.
+// PDF gradients are drawn across the entire image while
+// Canvas only allows gradients to be drawn in a rectangle
+// The following bug should allow us to remove this.
+// https://bugzilla.mozilla.org/show_bug.cgi?id=664884
+this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10);
+}
+this.restore();
+},
+// Images
+beginInlineImage: function CanvasGraphics_beginInlineImage() {
+error('Should not call beginInlineImage');
+},
+beginImageData: function CanvasGraphics_beginImageData() {
+error('Should not call beginImageData');
+},
+paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(matrix,
+bbox) {
+this.save();
+this.baseTransformStack.push(this.baseTransform);
+if (matrix && isArray(matrix) && 6 == matrix.length) {
+this.transform.apply(this, matrix);
+}
+this.baseTransform = this.ctx.mozCurrentTransform;
+if (bbox && isArray(bbox) && 4 == bbox.length) {
+var width = bbox[2] - bbox[0];
+var height = bbox[3] - bbox[1];
+this.rectangle(bbox[0], bbox[1], width, height);
+this.clip();
+this.endPath();
+}
+},
+paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() {
+this.restore();
+this.baseTransform = this.baseTransformStack.pop();
+},
+beginGroup: function CanvasGraphics_beginGroup(group) {
+this.save();
+var currentCtx = this.ctx;
+// TODO non-isolated groups - according to Rik at adobe non-isolated
+// group results aren't usually that different and they even have tools
+// that ignore this setting. Notes from Rik on implmenting:
+// - When you encounter an transparency group, create a new canvas with
+// the dimensions of the bbox
+// - copy the content from the previous canvas to the new canvas
+// - draw as usual
+// - remove the backdrop alpha:
+// alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha
+// value of your transparency group and 'alphaBackdrop' the alpha of the
+// backdrop
+// - remove background color:
+// colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew)
+if (!group.isolated) {
+info('TODO: Support non-isolated groups.');
+}
+// TODO knockout - supposedly possible with the clever use of compositing
+// modes.
+if (group.knockout) {
+warn('Knockout groups not supported.');
+}
+var currentTransform = currentCtx.mozCurrentTransform;
+if (group.matrix) {
+currentCtx.transform.apply(currentCtx, group.matrix);
+}
+assert(group.bbox, 'Bounding box is required.');
+// Based on the current transform figure out how big the bounding box
+// will actually be.
+var bounds = Util.getAxialAlignedBoundingBox(
+group.bbox,
+currentCtx.mozCurrentTransform);
+// Clip the bounding box to the current canvas.
+var canvasBounds = [0,
+0,
+currentCtx.canvas.width,
+currentCtx.canvas.height];
+bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0];
+// Use ceil in case we're between sizes so we don't create canvas that is
+// too small and make the canvas at least 1x1 pixels.
+var offsetX = Math.floor(bounds[0]);
+var offsetY = Math.floor(bounds[1]);
+var drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1);
+var drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1);
+var scaleX = 1, scaleY = 1;
+if (drawnWidth > MAX_GROUP_SIZE) {
+scaleX = drawnWidth / MAX_GROUP_SIZE;
+drawnWidth = MAX_GROUP_SIZE;
+}
+if (drawnHeight > MAX_GROUP_SIZE) {
+scaleY = drawnHeight / MAX_GROUP_SIZE;
+drawnHeight = MAX_GROUP_SIZE;
+}
+var cacheId = 'groupAt' + this.groupLevel;
+if (group.smask) {
+// Using two cache entries is case if masks are used one after another.
+cacheId +=  '_smask_' + ((this.smaskCounter++) % 2);
+}
+var scratchCanvas = CachedCanvases.getCanvas(
+cacheId, drawnWidth, drawnHeight, true);
+var groupCtx = scratchCanvas.context;
+// Since we created a new canvas that is just the size of the bounding box
+// we have to translate the group ctx.
+groupCtx.scale(1 / scaleX, 1 / scaleY);
+groupCtx.translate(-offsetX, -offsetY);
+groupCtx.transform.apply(groupCtx, currentTransform);
+if (group.smask) {
+// Saving state and cached mask to be used in setGState.
+this.smaskStack.push({
+canvas: scratchCanvas.canvas,
+context: groupCtx,
+offsetX: offsetX,
+offsetY: offsetY,
+scaleX: scaleX,
+scaleY: scaleY,
+subtype: group.smask.subtype,
+backdrop: group.smask.backdrop,
+colorSpace: group.colorSpace && ColorSpace.fromIR(group.colorSpace)
+});
+} else {
+// Setup the current ctx so when the group is popped we draw it at the
+// right location.
+currentCtx.setTransform(1, 0, 0, 1, 0, 0);
+currentCtx.translate(offsetX, offsetY);
+currentCtx.scale(scaleX, scaleY);
+}
+// The transparency group inherits all off the current graphics state
+// except the blend mode, soft mask, and alpha constants.
+copyCtxState(currentCtx, groupCtx);
+this.ctx = groupCtx;
+this.setGState([
+['BM', 'Normal'],
+['ca', 1],
+['CA', 1]
+]);
+this.groupStack.push(currentCtx);
+this.groupLevel++;
+},
+endGroup: function CanvasGraphics_endGroup(group) {
+this.groupLevel--;
+var groupCtx = this.ctx;
+this.ctx = this.groupStack.pop();
+// Turn off image smoothing to avoid sub pixel interpolation which can
+// look kind of blurry for some pdfs.
+if ('imageSmoothingEnabled' in this.ctx) {
+this.ctx.imageSmoothingEnabled = false;
+} else {
+this.ctx.mozImageSmoothingEnabled = false;
+}
+if (group.smask) {
+this.tempSMask = this.smaskStack.pop();
+} else {
+this.ctx.drawImage(groupCtx.canvas, 0, 0);
+}
+this.restore();
+},
+beginAnnotations: function CanvasGraphics_beginAnnotations() {
+this.save();
+this.current = new CanvasExtraState();
+},
+endAnnotations: function CanvasGraphics_endAnnotations() {
+this.restore();
+},
+beginAnnotation: function CanvasGraphics_beginAnnotation(rect, transform,
+matrix) {
+this.save();
+if (rect && isArray(rect) && 4 == rect.length) {
+var width = rect[2] - rect[0];
+var height = rect[3] - rect[1];
+this.rectangle(rect[0], rect[1], width, height);
+this.clip();
+this.endPath();
+}
+this.transform.apply(this, transform);
+this.transform.apply(this, matrix);
+},
+endAnnotation: function CanvasGraphics_endAnnotation() {
+this.restore();
+},
+paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) {
+var domImage = this.objs.get(objId);
+if (!domImage) {
+warn('Dependent image isn\'t ready yet');
+return;
+}
+this.save();
+var ctx = this.ctx;
+// scale the image to the unit square
+ctx.scale(1 / w, -1 / h);
+ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height,
+0, -h, w, h);
+if (this.imageLayer) {
+var currentTransform = ctx.mozCurrentTransformInverse;
+var position = this.getCanvasPosition(0, 0);
+this.imageLayer.appendImage({
+objId: objId,
+left: position[0],
+top: position[1],
+width: w / currentTransform[0],
+height: h / currentTransform[3]
+});
+}
+this.restore();
+},
+paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) {
+var ctx = this.ctx;
+var width = img.width, height = img.height;
+var glyph = this.processingType3;
+if (COMPILE_TYPE3_GLYPHS && glyph && !('compiled' in glyph)) {
+var MAX_SIZE_TO_COMPILE = 1000;
+if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) {
+glyph.compiled =
+compileType3Glyph({data: img.data, width: width, height: height});
+} else {
+glyph.compiled = null;
+}
+}
+if (glyph && glyph.compiled) {
+glyph.compiled(ctx);
+return;
+}
+var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height);
+var maskCtx = maskCanvas.context;
+maskCtx.save();
+putBinaryImageMask(maskCtx, img);
+maskCtx.globalCompositeOperation = 'source-in';
+var fillColor = this.current.fillColor;
+maskCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') &&
+fillColor.type === 'Pattern') ?
+fillColor.getPattern(maskCtx, this) : fillColor;
+maskCtx.fillRect(0, 0, width, height);
+maskCtx.restore();
+this.paintInlineImageXObject(maskCanvas.canvas);
+},
+paintImageMaskXObjectRepeat:
+function CanvasGraphics_paintImageMaskXObjectRepeat(imgData, scaleX,
+scaleY, positions) {
+var width = imgData.width;
+var height = imgData.height;
+var ctx = this.ctx;
+var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height);
+var maskCtx = maskCanvas.context;
+maskCtx.save();
+putBinaryImageMask(maskCtx, imgData);
+maskCtx.globalCompositeOperation = 'source-in';
+var fillColor = this.current.fillColor;
+maskCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') &&
+fillColor.type === 'Pattern') ?
+fillColor.getPattern(maskCtx, this) : fillColor;
+maskCtx.fillRect(0, 0, width, height);
+maskCtx.restore();
+for (var i = 0, ii = positions.length; i < ii; i += 2) {
+ctx.save();
+ctx.transform(scaleX, 0, 0, scaleY, positions[i], positions[i + 1]);
+ctx.scale(1, -1);
+ctx.drawImage(maskCanvas.canvas, 0, 0, width, height,
+0, -1, 1, 1);
+ctx.restore();
+}
+},
+paintImageMaskXObjectGroup:
+function CanvasGraphics_paintImageMaskXObjectGroup(images) {
+var ctx = this.ctx;
+for (var i = 0, ii = images.length; i < ii; i++) {
+var image = images[i];
+var width = image.width, height = image.height;
+var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height);
+var maskCtx = maskCanvas.context;
+maskCtx.save();
+putBinaryImageMask(maskCtx, image);
+maskCtx.globalCompositeOperation = 'source-in';
+var fillColor = this.current.fillColor;
+maskCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') &&
+fillColor.type === 'Pattern') ?
+fillColor.getPattern(maskCtx, this) : fillColor;
+maskCtx.fillRect(0, 0, width, height);
+maskCtx.restore();
+ctx.save();
+ctx.transform.apply(ctx, image.transform);
+ctx.scale(1, -1);
+ctx.drawImage(maskCanvas.canvas, 0, 0, width, height,
+0, -1, 1, 1);
+ctx.restore();
+}
+},
+paintImageXObject: function CanvasGraphics_paintImageXObject(objId) {
+var imgData = this.objs.get(objId);
+if (!imgData) {
+warn('Dependent image isn\'t ready yet');
+return;
+}
+this.paintInlineImageXObject(imgData);
+},
+paintImageXObjectRepeat:
+function CanvasGraphics_paintImageXObjectRepeat(objId, scaleX, scaleY,
+positions) {
+var imgData = this.objs.get(objId);
+if (!imgData) {
+warn('Dependent image isn\'t ready yet');
+return;
+}
+var width = imgData.width;
+var height = imgData.height;
+var map = [];
+for (var i = 0, ii = positions.length; i < ii; i += 2) {
+map.push({transform: [scaleX, 0, 0, scaleY, positions[i],
+positions[i + 1]], x: 0, y: 0, w: width, h: height});
+}
+this.paintInlineImageXObjectGroup(imgData, map);
+},
+paintInlineImageXObject:
+function CanvasGraphics_paintInlineImageXObject(imgData) {
+var width = imgData.width;
+var height = imgData.height;
+var ctx = this.ctx;
+this.save();
+// scale the image to the unit square
+ctx.scale(1 / width, -1 / height);
+var currentTransform = ctx.mozCurrentTransformInverse;
+var a = currentTransform[0], b = currentTransform[1];
+var widthScale = Math.max(Math.sqrt(a * a + b * b), 1);
+var c = currentTransform[2], d = currentTransform[3];
+var heightScale = Math.max(Math.sqrt(c * c + d * d), 1);
+var imgToPaint, tmpCanvas;
+// instanceof HTMLElement does not work in jsdom node.js module
+if (imgData instanceof HTMLElement || !imgData.data) {
+imgToPaint = imgData;
+} else {
+tmpCanvas = CachedCanvases.getCanvas('inlineImage', width, height);
+var tmpCtx = tmpCanvas.context;
+putBinaryImageData(tmpCtx, imgData);
+imgToPaint = tmpCanvas.canvas;
+}
+var paintWidth = width, paintHeight = height;
+var tmpCanvasId = 'prescale1';
+// Vertial or horizontal scaling shall not be more than 2 to not loose the
+// pixels during drawImage operation, painting on the temporary canvas(es)
+// that are twice smaller in size
+while ((widthScale > 2 && paintWidth > 1) ||
+(heightScale > 2 && paintHeight > 1)) {
+var newWidth = paintWidth, newHeight = paintHeight;
+if (widthScale > 2 && paintWidth > 1) {
+newWidth = Math.ceil(paintWidth / 2);
+widthScale /= paintWidth / newWidth;
+}
+if (heightScale > 2 && paintHeight > 1) {
+newHeight = Math.ceil(paintHeight / 2);
+heightScale /= paintHeight / newHeight;
+}
+tmpCanvas = CachedCanvases.getCanvas(tmpCanvasId, newWidth, newHeight);
+tmpCtx = tmpCanvas.context;
+tmpCtx.clearRect(0, 0, newWidth, newHeight);
+tmpCtx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight,
+0, 0, newWidth, newHeight);
+imgToPaint = tmpCanvas.canvas;
+paintWidth = newWidth;
+paintHeight = newHeight;
+tmpCanvasId = tmpCanvasId === 'prescale1' ? 'prescale2' : 'prescale1';
+}
+ctx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight,
+0, -height, width, height);
+if (this.imageLayer) {
+var position = this.getCanvasPosition(0, -height);
+this.imageLayer.appendImage({
+imgData: imgData,
+left: position[0],
+top: position[1],
+width: width / currentTransform[0],
+height: height / currentTransform[3]
+});
+}
+this.restore();
+},
+paintInlineImageXObjectGroup:
+function CanvasGraphics_paintInlineImageXObjectGroup(imgData, map) {
+var ctx = this.ctx;
+var w = imgData.width;
+var h = imgData.height;
+var tmpCanvas = CachedCanvases.getCanvas('inlineImage', w, h);
+var tmpCtx = tmpCanvas.context;
+putBinaryImageData(tmpCtx, imgData);
+for (var i = 0, ii = map.length; i < ii; i++) {
+var entry = map[i];
+ctx.save();
+ctx.transform.apply(ctx, entry.transform);
+ctx.scale(1, -1);
+ctx.drawImage(tmpCanvas.canvas, entry.x, entry.y, entry.w, entry.h,
+0, -1, 1, 1);
+if (this.imageLayer) {
+var position = this.getCanvasPosition(entry.x, entry.y);
+this.imageLayer.appendImage({
+imgData: imgData,
+left: position[0],
+top: position[1],
+width: w,
+height: h
+});
+}
+ctx.restore();
+}
+},
+paintSolidColorImageMask:
+function CanvasGraphics_paintSolidColorImageMask() {
+this.ctx.fillRect(0, 0, 1, 1);
+},
+// Marked content
+markPoint: function CanvasGraphics_markPoint(tag) {
+// TODO Marked content.
+},
+markPointProps: function CanvasGraphics_markPointProps(tag, properties) {
+// TODO Marked content.
+},
+beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) {
+// TODO Marked content.
+},
+beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps(
+tag, properties) {
+// TODO Marked content.
+},
+endMarkedContent: function CanvasGraphics_endMarkedContent() {
+// TODO Marked content.
+},
+// Compatibility
+beginCompat: function CanvasGraphics_beginCompat() {
+// TODO ignore undefined operators (should we do that anyway?)
+},
+endCompat: function CanvasGraphics_endCompat() {
+// TODO stop ignoring undefined operators
+},
+// Helper functions
+consumePath: function CanvasGraphics_consumePath() {
+if (this.pendingClip) {
+if (this.pendingClip == EO_CLIP) {
+if ('mozFillRule' in this.ctx) {
+this.ctx.mozFillRule = 'evenodd';
+this.ctx.clip();
+this.ctx.mozFillRule = 'nonzero';
+} else {
+try {
+this.ctx.clip('evenodd');
+} catch (ex) {
+// shouldn't really happen, but browsers might think differently
+this.ctx.clip();
+}
+}
+} else {
+this.ctx.clip();
+}
+this.pendingClip = null;
+}
+this.ctx.beginPath();
+},
+getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) {
+var inverse = this.ctx.mozCurrentTransformInverse;
+// max of the current horizontal and vertical scale
+return Math.sqrt(Math.max(
+(inverse[0] * inverse[0] + inverse[1] * inverse[1]),
+(inverse[2] * inverse[2] + inverse[3] * inverse[3])));
+},
+getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) {
+var transform = this.ctx.mozCurrentTransform;
+return [
+transform[0] * x + transform[2] * y + transform[4],
+transform[1] * x + transform[3] * y + transform[5]
+];
+}
+};
+for (var op in OPS) {
+CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op];
+}
+return CanvasGraphics;
+})();
+var WebGLUtils = (function WebGLUtilsClosure() {
+function loadShader(gl, code, shaderType) {
+var shader = gl.createShader(shaderType);
+gl.shaderSource(shader, code);
+gl.compileShader(shader);
+var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
+if (!compiled) {
+var errorMsg = gl.getShaderInfoLog(shader);
+throw new Error('Error during shader compilation: ' + errorMsg);
+}
+return shader;
+}
+function createVertexShader(gl, code) {
+return loadShader(gl, code, gl.VERTEX_SHADER);
+}
+function createFragmentShader(gl, code) {
+return loadShader(gl, code, gl.FRAGMENT_SHADER);
+}
+function createProgram(gl, shaders) {
+var program = gl.createProgram();
+for (var i = 0, ii = shaders.length; i < ii; ++i) {
+gl.attachShader(program, shaders[i]);
+}
+gl.linkProgram(program);
+var linked = gl.getProgramParameter(program, gl.LINK_STATUS);
+if (!linked) {
+var errorMsg = gl.getProgramInfoLog(program);
+throw new Error('Error during program linking: ' + errorMsg);
+}
+return program;
+}
+function createTexture(gl, image, textureId) {
+gl.activeTexture(textureId);
+var texture = gl.createTexture();
+gl.bindTexture(gl.TEXTURE_2D, texture);
+// Set the parameters so we can render any size image.
+gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+// Upload the image into the texture.
+gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);
+return texture;
+}
+var currentGL, currentCanvas;
+function generageGL() {
+if (currentGL) {
+return;
+}
+currentCanvas = document.createElement('canvas');
+currentGL = currentCanvas.getContext('webgl',
+{ premultipliedalpha: false });
+}
+var smaskVertexShaderCode = '\
+attribute vec2 a_position;                                    \
+attribute vec2 a_texCoord;                                    \
+\
+uniform vec2 u_resolution;                                    \
+\
+varying vec2 v_texCoord;                                      \
+\
+void main() {                                                 \
+vec2 clipSpace = (a_position / u_resolution) * 2.0 - 1.0;   \
+gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);          \
+\
+v_texCoord = a_texCoord;                                    \
+}                                                             ';
+var smaskFragmentShaderCode = '\
+precision mediump float;                                      \
+\
+uniform vec4 u_backdrop;                                      \
+uniform int u_subtype;                                        \
+uniform sampler2D u_image;                                    \
+uniform sampler2D u_mask;                                     \
+\
+varying vec2 v_texCoord;                                      \
+\
+void main() {                                                 \
+vec4 imageColor = texture2D(u_image, v_texCoord);           \
+vec4 maskColor = texture2D(u_mask, v_texCoord);             \
+if (u_backdrop.a > 0.0) {                                   \
+maskColor.rgb = maskColor.rgb * maskColor.a +             \
+u_backdrop.rgb * (1.0 - maskColor.a);     \
+}                                                           \
+float lum;                                                  \
+if (u_subtype == 0) {                                       \
+lum = maskColor.a;                                        \
+} else {                                                    \
+lum = maskColor.r * 0.3 + maskColor.g * 0.59 +            \
+maskColor.b * 0.11;                                 \
+}                                                           \
+imageColor.a *= lum;                                        \
+imageColor.rgb *= imageColor.a;                             \
+gl_FragColor = imageColor;                                  \
+}                                                             ';
+var smaskCache = null;
+function initSmaskGL() {
+var canvas, gl;
+generageGL();
+canvas = currentCanvas;
+currentCanvas = null;
+gl = currentGL;
+currentGL = null;
+// setup a GLSL program
+var vertexShader = createVertexShader(gl, smaskVertexShaderCode);
+var fragmentShader = createFragmentShader(gl, smaskFragmentShaderCode);
+var program = createProgram(gl, [vertexShader, fragmentShader]);
+gl.useProgram(program);
+var cache = {};
+cache.gl = gl;
+cache.canvas = canvas;
+cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution');
+cache.positionLocation = gl.getAttribLocation(program, 'a_position');
+cache.backdropLocation = gl.getUniformLocation(program, 'u_backdrop');
+cache.subtypeLocation = gl.getUniformLocation(program, 'u_subtype');
+var texCoordLocation = gl.getAttribLocation(program, 'a_texCoord');
+var texLayerLocation = gl.getUniformLocation(program, 'u_image');
+var texMaskLocation = gl.getUniformLocation(program, 'u_mask');
+// provide texture coordinates for the rectangle.
+var texCoordBuffer = gl.createBuffer();
+gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
+gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
+0.0,  0.0,
+1.0,  0.0,
+0.0,  1.0,
+0.0,  1.0,
+1.0,  0.0,
+1.0,  1.0]), gl.STATIC_DRAW);
+gl.enableVertexAttribArray(texCoordLocation);
+gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0);
+gl.uniform1i(texLayerLocation, 0);
+gl.uniform1i(texMaskLocation, 1);
+smaskCache = cache;
+}
+function composeSMask(layer, mask, properties) {
+var width = layer.width, height = layer.height;
+if (!smaskCache) {
+initSmaskGL();
+}
+var cache = smaskCache,canvas = cache.canvas, gl = cache.gl;
+canvas.width = width;
+canvas.height = height;
+gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
+gl.uniform2f(cache.resolutionLocation, width, height);
+if (properties.backdrop) {
+gl.uniform4f(cache.resolutionLocation, properties.backdrop[0],
+properties.backdrop[1], properties.backdrop[2], 1);
+} else {
+gl.uniform4f(cache.resolutionLocation, 0, 0, 0, 0);
+}
+gl.uniform1i(cache.subtypeLocation,
+properties.subtype === 'Luminosity' ? 1 : 0);
+// Create a textures
+var texture = createTexture(gl, layer, gl.TEXTURE0);
+var maskTexture = createTexture(gl, mask, gl.TEXTURE1);
+// Create a buffer and put a single clipspace rectangle in
+// it (2 triangles)
+var buffer = gl.createBuffer();
+gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
+gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
+0, 0,
+width, 0,
+0, height,
+0, height,
+width, 0,
+width, height]), gl.STATIC_DRAW);
+gl.enableVertexAttribArray(cache.positionLocation);
+gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);
+// draw
+gl.clearColor(0, 0, 0, 0);
+gl.enable(gl.BLEND);
+gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA);
+gl.clear(gl.COLOR_BUFFER_BIT);
+gl.drawArrays(gl.TRIANGLES, 0, 6);
+gl.flush();
+gl.deleteTexture(texture);
+gl.deleteTexture(maskTexture);
+gl.deleteBuffer(buffer);
+return canvas;
+}
+var figuresVertexShaderCode = '\
+attribute vec2 a_position;                                    \
+attribute vec3 a_color;                                       \
+\
+uniform vec2 u_resolution;                                    \
+uniform vec2 u_scale;                                         \
+uniform vec2 u_offset;                                        \
+\
+varying vec4 v_color;                                         \
+\
+void main() {                                                 \
+vec2 position = (a_position + u_offset) * u_scale;          \
+vec2 clipSpace = (position / u_resolution) * 2.0 - 1.0;     \
+gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);          \
+\
+v_color = vec4(a_color / 255.0, 1.0);                       \
+}                                                             ';
+var figuresFragmentShaderCode = '\
+precision mediump float;                                      \
+\
+varying vec4 v_color;                                         \
+\
+void main() {                                                 \
+gl_FragColor = v_color;                                     \
+}                                                             ';
+var figuresCache = null;
+function initFiguresGL() {
+var canvas, gl;
+generageGL();
+canvas = currentCanvas;
+currentCanvas = null;
+gl = currentGL;
+currentGL = null;
+// setup a GLSL program
+var vertexShader = createVertexShader(gl, figuresVertexShaderCode);
+var fragmentShader = createFragmentShader(gl, figuresFragmentShaderCode);
+var program = createProgram(gl, [vertexShader, fragmentShader]);
+gl.useProgram(program);
+var cache = {};
+cache.gl = gl;
+cache.canvas = canvas;
+cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution');
+cache.scaleLocation = gl.getUniformLocation(program, 'u_scale');
+cache.offsetLocation = gl.getUniformLocation(program, 'u_offset');
+cache.positionLocation = gl.getAttribLocation(program, 'a_position');
+cache.colorLocation = gl.getAttribLocation(program, 'a_color');
+figuresCache = cache;
+}
+function drawFigures(width, height, backgroundColor, figures, context) {
+if (!figuresCache) {
+initFiguresGL();
+}
+var cache = figuresCache, canvas = cache.canvas, gl = cache.gl;
+canvas.width = width;
+canvas.height = height;
+gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
+gl.uniform2f(cache.resolutionLocation, width, height);
+// count triangle points
+var count = 0;
+var i, ii, rows;
+for (i = 0, ii = figures.length; i < ii; i++) {
+switch (figures[i].type) {
+case 'lattice':
+rows = (figures[i].coords.length / figures[i].verticesPerRow) | 0;
+count += (rows - 1) * (figures[i].verticesPerRow - 1) * 6;
+break;
+case 'triangles':
+count += figures[i].coords.length;
+break;
+}
+}
+// transfer data
+var coords = new Float32Array(count * 2);
+var colors = new Uint8Array(count * 3);
+var coordsMap = context.coords, colorsMap = context.colors;
+var pIndex = 0, cIndex = 0;
+for (i = 0, ii = figures.length; i < ii; i++) {
+var figure = figures[i], ps = figure.coords, cs = figure.colors;
+switch (figure.type) {
+case 'lattice':
+var cols = figure.verticesPerRow;
+rows = (ps.length / cols) | 0;
+for (var row = 1; row < rows; row++) {
+var offset = row * cols + 1;
+for (var col = 1; col < cols; col++, offset++) {
+coords[pIndex] = coordsMap[ps[offset - cols - 1]];
+coords[pIndex + 1] = coordsMap[ps[offset - cols - 1] + 1];
+coords[pIndex + 2] = coordsMap[ps[offset - cols]];
+coords[pIndex + 3] = coordsMap[ps[offset - cols] + 1];
+coords[pIndex + 4] = coordsMap[ps[offset - 1]];
+coords[pIndex + 5] = coordsMap[ps[offset - 1] + 1];
+colors[cIndex] = colorsMap[cs[offset - cols - 1]];
+colors[cIndex + 1] = colorsMap[cs[offset - cols - 1] + 1];
+colors[cIndex + 2] = colorsMap[cs[offset - cols - 1] + 2];
+colors[cIndex + 3] = colorsMap[cs[offset - cols]];
+colors[cIndex + 4] = colorsMap[cs[offset - cols] + 1];
+colors[cIndex + 5] = colorsMap[cs[offset - cols] + 2];
+colors[cIndex + 6] = colorsMap[cs[offset - 1]];
+colors[cIndex + 7] = colorsMap[cs[offset - 1] + 1];
+colors[cIndex + 8] = colorsMap[cs[offset - 1] + 2];
+coords[pIndex + 6] = coords[pIndex + 2];
+coords[pIndex + 7] = coords[pIndex + 3];
+coords[pIndex + 8] = coords[pIndex + 4];
+coords[pIndex + 9] = coords[pIndex + 5];
+coords[pIndex + 10] = coordsMap[ps[offset]];
+coords[pIndex + 11] = coordsMap[ps[offset] + 1];
+colors[cIndex + 9] = colors[cIndex + 3];
+colors[cIndex + 10] = colors[cIndex + 4];
+colors[cIndex + 11] = colors[cIndex + 5];
+colors[cIndex + 12] = colors[cIndex + 6];
+colors[cIndex + 13] = colors[cIndex + 7];
+colors[cIndex + 14] = colors[cIndex + 8];
+colors[cIndex + 15] = colorsMap[cs[offset]];
+colors[cIndex + 16] = colorsMap[cs[offset] + 1];
+colors[cIndex + 17] = colorsMap[cs[offset] + 2];
+pIndex += 12;
+cIndex += 18;
+}
+}
+break;
+case 'triangles':
+for (var j = 0, jj = ps.length; j < jj; j++) {
+coords[pIndex] = coordsMap[ps[j]];
+coords[pIndex + 1] = coordsMap[ps[j] + 1];
+colors[cIndex] = colorsMap[cs[i]];
+colors[cIndex + 1] = colorsMap[cs[j] + 1];
+colors[cIndex + 2] = colorsMap[cs[j] + 2];
+pIndex += 2;
+cIndex += 3;
+}
+break;
+}
+}
+// draw
+if (backgroundColor) {
+gl.clearColor(backgroundColor[0] / 255, backgroundColor[1] / 255,
+backgroundColor[2] / 255, 1.0);
+} else {
+gl.clearColor(0, 0, 0, 0);
+}
+gl.clear(gl.COLOR_BUFFER_BIT);
+var coordsBuffer = gl.createBuffer();
+gl.bindBuffer(gl.ARRAY_BUFFER, coordsBuffer);
+gl.bufferData(gl.ARRAY_BUFFER, coords, gl.STATIC_DRAW);
+gl.enableVertexAttribArray(cache.positionLocation);
+gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);
+var colorsBuffer = gl.createBuffer();
+gl.bindBuffer(gl.ARRAY_BUFFER, colorsBuffer);
+gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW);
+gl.enableVertexAttribArray(cache.colorLocation);
+gl.vertexAttribPointer(cache.colorLocation, 3, gl.UNSIGNED_BYTE, false,
+0, 0);
+gl.uniform2f(cache.scaleLocation, context.scaleX, context.scaleY);
+gl.uniform2f(cache.offsetLocation, context.offsetX, context.offsetY);
+gl.drawArrays(gl.TRIANGLES, 0, count);
+gl.flush();
+gl.deleteBuffer(coordsBuffer);
+gl.deleteBuffer(colorsBuffer);
+return canvas;
+}
+function cleanup() {
+smaskCache = null;
+figuresCache = null;
+}
+return {
+get isEnabled() {
+if (PDFJS.disableWebGL) {
+return false;
+}
+var enabled = false;
+try {
+generageGL();
+enabled = !!currentGL;
+} catch (e) { }
+return shadow(this, 'isEnabled', enabled);
+},
+composeSMask: composeSMask,
+drawFigures: drawFigures,
+clear: cleanup
+};
+})();
+var ShadingIRs = {};
+ShadingIRs.RadialAxial = {
+fromIR: function RadialAxial_fromIR(raw) {
+var type = raw[1];
+var colorStops = raw[2];
+var p0 = raw[3];
+var p1 = raw[4];
+var r0 = raw[5];
+var r1 = raw[6];
+return {
+type: 'Pattern',
+getPattern: function RadialAxial_getPattern(ctx) {
+var grad;
+if (type === 'axial') {
+grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);
+} else if (type === 'radial') {
+grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1);
+}
+for (var i = 0, ii = colorStops.length; i < ii; ++i) {
+var c = colorStops[i];
+grad.addColorStop(c[0], c[1]);
+}
+return grad;
+}
+};
+}
+};
+var createMeshCanvas = (function createMeshCanvasClosure() {
+function drawTriangle(data, context, p1, p2, p3, c1, c2, c3) {
+// Very basic Gouraud-shaded triangle rasterization algorithm.
+var coords = context.coords, colors = context.colors;
+var bytes = data.data, rowSize = data.width * 4;
+var tmp;
+if (coords[p1 + 1] > coords[p2 + 1]) {
+tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp;
+}
+if (coords[p2 + 1] > coords[p3 + 1]) {
+tmp = p2; p2 = p3; p3 = tmp; tmp = c2; c2 = c3; c3 = tmp;
+}
+if (coords[p1 + 1] > coords[p2 + 1]) {
+tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp;
+}
+var x1 = (coords[p1] + context.offsetX) * context.scaleX;
+var y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY;
+var x2 = (coords[p2] + context.offsetX) * context.scaleX;
+var y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY;
+var x3 = (coords[p3] + context.offsetX) * context.scaleX;
+var y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY;
+if (y1 >= y3) {
+return;
+}
+var c1r = colors[c1], c1g = colors[c1 + 1], c1b = colors[c1 + 2];
+var c2r = colors[c2], c2g = colors[c2 + 1], c2b = colors[c2 + 2];
+var c3r = colors[c3], c3g = colors[c3 + 1], c3b = colors[c3 + 2];
+var minY = Math.round(y1), maxY = Math.round(y3);
+var xa, car, cag, cab;
+var xb, cbr, cbg, cbb;
+var k;
+for (var y = minY; y <= maxY; y++) {
+if (y < y2) {
+k = y < y1 ? 0 : y1 === y2 ? 1 : (y1 - y) / (y1 - y2);
+xa = x1 - (x1 - x2) * k;
+car = c1r - (c1r - c2r) * k;
+cag = c1g - (c1g - c2g) * k;
+cab = c1b - (c1b - c2b) * k;
+} else {
+k = y > y3 ? 1 : y2 === y3 ? 0 : (y2 - y) / (y2 - y3);
+xa = x2 - (x2 - x3) * k;
+car = c2r - (c2r - c3r) * k;
+cag = c2g - (c2g - c3g) * k;
+cab = c2b - (c2b - c3b) * k;
+}
+k = y < y1 ? 0 : y > y3 ? 1 : (y1 - y) / (y1 - y3);
+xb = x1 - (x1 - x3) * k;
+cbr = c1r - (c1r - c3r) * k;
+cbg = c1g - (c1g - c3g) * k;
+cbb = c1b - (c1b - c3b) * k;
+var x1_ = Math.round(Math.min(xa, xb));
+var x2_ = Math.round(Math.max(xa, xb));
+var j = rowSize * y + x1_ * 4;
+for (var x = x1_; x <= x2_; x++) {
+k = (xa - x) / (xa - xb);
+k = k < 0 ? 0 : k > 1 ? 1 : k;
+bytes[j++] = (car - (car - cbr) * k) | 0;
+bytes[j++] = (cag - (cag - cbg) * k) | 0;
+bytes[j++] = (cab - (cab - cbb) * k) | 0;
+bytes[j++] = 255;
+}
+}
+}
+function drawFigure(data, figure, context) {
+var ps = figure.coords;
+var cs = figure.colors;
+var i, ii;
+switch (figure.type) {
+case 'lattice':
+var verticesPerRow = figure.verticesPerRow;
+var rows = Math.floor(ps.length / verticesPerRow) - 1;
+var cols = verticesPerRow - 1;
+for (i = 0; i < rows; i++) {
+var q = i * verticesPerRow;
+for (var j = 0; j < cols; j++, q++) {
+drawTriangle(data, context,
+ps[q], ps[q + 1], ps[q + verticesPerRow],
+cs[q], cs[q + 1], cs[q + verticesPerRow]);
+drawTriangle(data, context,
+ps[q + verticesPerRow + 1], ps[q + 1], ps[q + verticesPerRow],
+cs[q + verticesPerRow + 1], cs[q + 1], cs[q + verticesPerRow]);
+}
+}
+break;
+case 'triangles':
+for (i = 0, ii = ps.length; i < ii; i += 3) {
+drawTriangle(data, context,
+ps[i], ps[i + 1], ps[i + 2],
+cs[i], cs[i + 1], cs[i + 2]);
+}
+break;
+default:
+error('illigal figure');
+break;
+}
+}
+function createMeshCanvas(bounds, combinesScale, coords, colors, figures,
+backgroundColor) {
+// we will increase scale on some weird factor to let antialiasing take
+// care of "rough" edges
+var EXPECTED_SCALE = 1.1;
+// MAX_PATTERN_SIZE is used to avoid OOM situation.
+var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough
+var offsetX = Math.floor(bounds[0]);
+var offsetY = Math.floor(bounds[1]);
+var boundsWidth = Math.ceil(bounds[2]) - offsetX;
+var boundsHeight = Math.ceil(bounds[3]) - offsetY;
+var width = Math.min(Math.ceil(Math.abs(boundsWidth * combinesScale[0] *
+EXPECTED_SCALE)), MAX_PATTERN_SIZE);
+var height = Math.min(Math.ceil(Math.abs(boundsHeight * combinesScale[1] *
+EXPECTED_SCALE)), MAX_PATTERN_SIZE);
+var scaleX = boundsWidth / width;
+var scaleY = boundsHeight / height;
+var context = {
+coords: coords,
+colors: colors,
+offsetX: -offsetX,
+offsetY: -offsetY,
+scaleX: 1 / scaleX,
+scaleY: 1 / scaleY
+};
+var canvas, tmpCanvas, i, ii;
+if (WebGLUtils.isEnabled) {
+canvas = WebGLUtils.drawFigures(width, height, backgroundColor,
+figures, context);
+// https://bugzilla.mozilla.org/show_bug.cgi?id=972126
+tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false);
+tmpCanvas.context.drawImage(canvas, 0, 0);
+canvas = tmpCanvas.canvas;
+} else {
+tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false);
+var tmpCtx = tmpCanvas.context;
+var data = tmpCtx.createImageData(width, height);
+if (backgroundColor) {
+var bytes = data.data;
+for (i = 0, ii = bytes.length; i < ii; i += 4) {
+bytes[i] = backgroundColor[0];
+bytes[i + 1] = backgroundColor[1];
+bytes[i + 2] = backgroundColor[2];
+bytes[i + 3] = 255;
+}
+}
+for (i = 0; i < figures.length; i++) {
+drawFigure(data, figures[i], context);
+}
+tmpCtx.putImageData(data, 0, 0);
+canvas = tmpCanvas.canvas;
+}
+return {canvas: canvas, offsetX: offsetX, offsetY: offsetY,
+scaleX: scaleX, scaleY: scaleY};
+}
+return createMeshCanvas;
+})();
+ShadingIRs.Mesh = {
+fromIR: function Mesh_fromIR(raw) {
+//var type = raw[1];
+var coords = raw[2];
+var colors = raw[3];
+var figures = raw[4];
+var bounds = raw[5];
+var matrix = raw[6];
+//var bbox = raw[7];
+var background = raw[8];
+return {
+type: 'Pattern',
+getPattern: function Mesh_getPattern(ctx, owner, shadingFill) {
+var combinedScale;
+// Obtain scale from matrix and current transformation matrix.
+if (shadingFill) {
+combinedScale = Util.singularValueDecompose2dScale(
+ctx.mozCurrentTransform);
+} else {
+var matrixScale = Util.singularValueDecompose2dScale(matrix);
+var curMatrixScale = Util.singularValueDecompose2dScale(
+owner.baseTransform);
+combinedScale = [matrixScale[0] * curMatrixScale[0],
+matrixScale[1] * curMatrixScale[1]];
+}
+// Rasterizing on the main thread since sending/queue large canvases
+// might cause OOM.
+var temporaryPatternCanvas = createMeshCanvas(bounds, combinedScale,
+coords, colors, figures, shadingFill ? null : background);
+if (!shadingFill) {
+ctx.setTransform.apply(ctx, owner.baseTransform);
+if (matrix) {
+ctx.transform.apply(ctx, matrix);
+}
+}
+ctx.translate(temporaryPatternCanvas.offsetX,
+temporaryPatternCanvas.offsetY);
+ctx.scale(temporaryPatternCanvas.scaleX,
+temporaryPatternCanvas.scaleY);
+return ctx.createPattern(temporaryPatternCanvas.canvas, 'no-repeat');
+}
+};
+}
+};
+ShadingIRs.Dummy = {
+fromIR: function Dummy_fromIR() {
+return {
+type: 'Pattern',
+getPattern: function Dummy_fromIR_getPattern() {
+return 'hotpink';
+}
+};
+}
+};
+function getShadingPatternFromIR(raw) {
+var shadingIR = ShadingIRs[raw[0]];
+if (!shadingIR) {
+error('Unknown IR type: ' + raw[0]);
+}
+return shadingIR.fromIR(raw);
+}
+var TilingPattern = (function TilingPatternClosure() {
+var PaintType = {
+COLORED: 1,
+UNCOLORED: 2
+};
+var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough
+function TilingPattern(IR, color, ctx, objs, commonObjs, baseTransform) {
+this.name = IR[1][0].name;
+this.operatorList = IR[2];
+this.matrix = IR[3] || [1, 0, 0, 1, 0, 0];
+this.bbox = IR[4];
+this.xstep = IR[5];
+this.ystep = IR[6];
+this.paintType = IR[7];
+this.tilingType = IR[8];
+this.color = color;
+this.objs = objs;
+this.commonObjs = commonObjs;
+this.baseTransform = baseTransform;
+this.type = 'Pattern';
+this.ctx = ctx;
+}
+TilingPattern.prototype = {
+createPatternCanvas: function TilinPattern_createPatternCanvas(owner) {
+var operatorList = this.operatorList;
+var bbox = this.bbox;
+var xstep = this.xstep;
+var ystep = this.ystep;
+var paintType = this.paintType;
+var tilingType = this.tilingType;
+var color = this.color;
+var objs = this.objs;
+var commonObjs = this.commonObjs;
+info('TilingType: ' + tilingType);
+var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3];
+var topLeft = [x0, y0];
+// we want the canvas to be as large as the step size
+var botRight = [x0 + xstep, y0 + ystep];
+var width = botRight[0] - topLeft[0];
+var height = botRight[1] - topLeft[1];
+// Obtain scale from matrix and current transformation matrix.
+var matrixScale = Util.singularValueDecompose2dScale(this.matrix);
+var curMatrixScale = Util.singularValueDecompose2dScale(
+this.baseTransform);
+var combinedScale = [matrixScale[0] * curMatrixScale[0],
+matrixScale[1] * curMatrixScale[1]];
+// MAX_PATTERN_SIZE is used to avoid OOM situation.
+// Use width and height values that are as close as possible to the end
+// result when the pattern is used. Too low value makes the pattern look
+// blurry. Too large value makes it look too crispy.
+width = Math.min(Math.ceil(Math.abs(width * combinedScale[0])),
+MAX_PATTERN_SIZE);
+height = Math.min(Math.ceil(Math.abs(height * combinedScale[1])),
+MAX_PATTERN_SIZE);
+var tmpCanvas = CachedCanvases.getCanvas('pattern', width, height, true);
+var tmpCtx = tmpCanvas.context;
+var graphics = new CanvasGraphics(tmpCtx, commonObjs, objs);
+graphics.groupLevel = owner.groupLevel;
+this.setFillAndStrokeStyleToContext(tmpCtx, paintType, color);
+this.setScale(width, height, xstep, ystep);
+this.transformToScale(graphics);
+// transform coordinates to pattern space
+var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]];
+graphics.transform.apply(graphics, tmpTranslate);
+this.clipBbox(graphics, bbox, x0, y0, x1, y1);
+graphics.executeOperatorList(operatorList);
+return tmpCanvas.canvas;
+},
+setScale: function TilingPattern_setScale(width, height, xstep, ystep) {
+this.scale = [width / xstep, height / ystep];
+},
+transformToScale: function TilingPattern_transformToScale(graphics) {
+var scale = this.scale;
+var tmpScale = [scale[0], 0, 0, scale[1], 0, 0];
+graphics.transform.apply(graphics, tmpScale);
+},
+scaleToContext: function TilingPattern_scaleToContext() {
+var scale = this.scale;
+this.ctx.scale(1 / scale[0], 1 / scale[1]);
+},
+clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) {
+if (bbox && isArray(bbox) && 4 == bbox.length) {
+var bboxWidth = x1 - x0;
+var bboxHeight = y1 - y0;
+graphics.rectangle(x0, y0, bboxWidth, bboxHeight);
+graphics.clip();
+graphics.endPath();
+}
+},
+setFillAndStrokeStyleToContext:
+function setFillAndStrokeStyleToContext(context, paintType, color) {
+switch (paintType) {
+case PaintType.COLORED:
+var ctx = this.ctx;
+context.fillStyle = ctx.fillStyle;
+context.strokeStyle = ctx.strokeStyle;
+break;
+case PaintType.UNCOLORED:
+var rgbColor = ColorSpace.singletons.rgb.getRgb(color, 0);
+var cssColor = Util.makeCssRgb(rgbColor);
+context.fillStyle = cssColor;
+context.strokeStyle = cssColor;
+break;
+default:
+error('Unsupported paint type: ' + paintType);
+}
+},
+getPattern: function TilingPattern_getPattern(ctx, owner) {
+var temporaryPatternCanvas = this.createPatternCanvas(owner);
+ctx = this.ctx;
+ctx.setTransform.apply(ctx, this.baseTransform);
+ctx.transform.apply(ctx, this.matrix);
+this.scaleToContext();
+return ctx.createPattern(temporaryPatternCanvas, 'repeat');
+}
+};
+return TilingPattern;
+})();
+PDFJS.disableFontFace = false;
+var FontLoader = {
+insertRule: function fontLoaderInsertRule(rule) {
+var styleElement = document.getElementById('PDFJS_FONT_STYLE_TAG');
+if (!styleElement) {
+styleElement = document.createElement('style');
+styleElement.id = 'PDFJS_FONT_STYLE_TAG';
+document.documentElement.getElementsByTagName('head')[0].appendChild(
+styleElement);
+}
+var styleSheet = styleElement.sheet;
+styleSheet.insertRule(rule, styleSheet.cssRules.length);
+},
+clear: function fontLoaderClear() {
+var styleElement = document.getElementById('PDFJS_FONT_STYLE_TAG');
+if (styleElement) {
+styleElement.parentNode.removeChild(styleElement);
+}
+},
+bind: function fontLoaderBind(fonts, callback) {
+assert(!isWorker, 'bind() shall be called from main thread');
+for (var i = 0, ii = fonts.length; i < ii; i++) {
+var font = fonts[i];
+if (font.attached) {
+continue;
+}
+font.attached = true;
+font.bindDOM()
+}
+setTimeout(callback);
+}
+};
+var FontFace = (function FontFaceClosure() {
+function FontFace(name, file, properties) {
+this.compiledGlyphs = {};
+if (arguments.length === 1) {
+// importing translated data
+var data = arguments[0];
+for (var i in data) {
+this[i] = data[i];
+}
+return;
+}
+}
+FontFace.prototype = {
+bindDOM: function FontFace_bindDOM() {
+if (!this.data) {
+return null;
+}
+if (PDFJS.disableFontFace) {
+this.disableFontFace = true;
+return null;
+}
+var data = bytesToString(new Uint8Array(this.data));
+var fontName = this.loadedName;
+// Add the font-face rule to the document
+var url = ('url(data:' + this.mimetype + ';base64,' +
+window.btoa(data) + ');');
+var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}';
+FontLoader.insertRule(rule);
+if (PDFJS.pdfBug && 'FontInspector' in globalScope &&
+globalScope['FontInspector'].enabled) {
+globalScope['FontInspector'].fontAdded(this, url);
+}
+return rule;
+},
+getPathGenerator: function (objs, character) {
+if (!(character in this.compiledGlyphs)) {
+var js = objs.get(this.loadedName + '_path_' + character);
+/*jshint -W054 */
+this.compiledGlyphs[character] = new Function('c', 'size', js);
+}
+return this.compiledGlyphs[character];
+}
+};
+return FontFace;
+})();
+}).call((typeof window === 'undefined') ? this : window);