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authorschneefux <schneefux+commit@schneefux.xyz>2014-03-16 12:10:37 +0100
committerschneefux <schneefux+commit@schneefux.xyz>2016-08-15 19:46:44 +0200
commit54c97a4d81e3d4bfd31e2320713b134e7cb874f5 (patch)
tree33aed42bae96b16eac353295b91e4e0f2494a5d8 /js/pdf.js
parentbf0306f5af3a74cee9c65a481fdafa680dfef668 (diff)
downloadwvs-vplan-54c97a4d81e3d4bfd31e2320713b134e7cb874f5.tar.gz
wvs-vplan-54c97a4d81e3d4bfd31e2320713b134e7cb874f5.zip
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+/* -*- 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 = '0.8.1239';
+PDFJS.build = '1a6e103';
+
+(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
+};
+
+// 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;
+ }
+ if (url.charAt(0) == '/') {
+ // absolute path
+ var 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;
+ 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;
+
+// In a well-formed PDF, |cond| holds. If it doesn't, subsequent
+// behavior is undefined.
+function assertWellFormed(cond, msg) {
+ if (!cond) {
+ error(msg);
+ }
+}
+
+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 strBuf = [];
+ var length = bytes.length;
+ for (var n = 0; n < length; ++n) {
+ strBuf.push(String.fromCharCode(bytes[n]));
+ }
+ return strBuf.join('');
+}
+
+function stringToBytes(str) {
+ var length = str.length;
+ var bytes = new Uint8Array(length);
+ for (var n = 0; n < length; ++n) {
+ bytes[n] = str.charCodeAt(n) & 0xFF;
+ }
+ return bytes;
+}
+
+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
+ */
+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;
+ }
+ var STATUS_PENDING = 0;
+ var STATUS_RESOLVED = 1;
+ var STATUS_REJECTED = 2;
+
+ // In an attempt to avoid silent exceptions, unhandled rejections are
+ // tracked and if they aren't handled in a certain amount of time an
+ // error is logged.
+ var REJECTION_TIMEOUT = 500;
+
+ var HandlerManager = {
+ handlers: [],
+ running: false,
+ unhandledRejections: [],
+ pendingRejectionCheck: false,
+
+ scheduleHandlers: function scheduleHandlers(promise) {
+ if (promise._status == STATUS_PENDING) {
+ return;
+ }
+
+ this.handlers = this.handlers.concat(promise._handlers);
+ promise._handlers = [];
+
+ if (this.running) {
+ return;
+ }
+ this.running = true;
+
+ setTimeout(this.runHandlers.bind(this), 0);
+ },
+
+ runHandlers: function runHandlers() {
+ var RUN_TIMEOUT = 1; // ms
+ var timeoutAt = Date.now() + RUN_TIMEOUT;
+ while (this.handlers.length > 0) {
+ var handler = this.handlers.shift();
+
+ var nextStatus = handler.thisPromise._status;
+ var nextValue = handler.thisPromise._value;
+
+ try {
+ if (nextStatus === STATUS_RESOLVED) {
+ if (typeof(handler.onResolve) == 'function') {
+ nextValue = handler.onResolve(nextValue);
+ }
+ } else if (typeof(handler.onReject) === 'function') {
+ nextValue = handler.onReject(nextValue);
+ nextStatus = STATUS_RESOLVED;
+
+ if (handler.thisPromise._unhandledRejection) {
+ this.removeUnhandeledRejection(handler.thisPromise);
+ }
+ }
+ } catch (ex) {
+ nextStatus = STATUS_REJECTED;
+ nextValue = ex;
+ }
+
+ handler.nextPromise._updateStatus(nextStatus, nextValue);
+ if (Date.now() >= timeoutAt) {
+ break;
+ }
+ }
+
+ if (this.handlers.length > 0) {
+ setTimeout(this.runHandlers.bind(this), 0);
+ return;
+ }
+
+ this.running = false;
+ },
+
+ addUnhandledRejection: function addUnhandledRejection(promise) {
+ this.unhandledRejections.push({
+ promise: promise,
+ time: Date.now()
+ });
+ this.scheduleRejectionCheck();
+ },
+
+ removeUnhandeledRejection: function removeUnhandeledRejection(promise) {
+ promise._unhandledRejection = false;
+ for (var i = 0; i < this.unhandledRejections.length; i++) {
+ if (this.unhandledRejections[i].promise === promise) {
+ this.unhandledRejections.splice(i);
+ i--;
+ }
+ }
+ },
+
+ scheduleRejectionCheck: function scheduleRejectionCheck() {
+ if (this.pendingRejectionCheck) {
+ return;
+ }
+ this.pendingRejectionCheck = true;
+ setTimeout(function rejectionCheck() {
+ this.pendingRejectionCheck = false;
+ var now = Date.now();
+ for (var i = 0; i < this.unhandledRejections.length; i++) {
+ if (now - this.unhandledRejections[i].time > REJECTION_TIMEOUT) {
+ var unhandled = this.unhandledRejections[i].promise._value;
+ var msg = 'Unhandled rejection: ' + unhandled;
+ if (unhandled.stack) {
+ msg += '\n' + unhandled.stack;
+ }
+ warn(msg);
+ this.unhandledRejections.splice(i);
+ i--;
+ }
+ }
+ if (this.unhandledRejections.length) {
+ this.scheduleRejectionCheck();
+ }
+ }.bind(this), REJECTION_TIMEOUT);
+ }
+ };
+
+ function Promise(resolver) {
+ this._status = STATUS_PENDING;
+ this._handlers = [];
+ resolver.call(this, this._resolve.bind(this), this._reject.bind(this));
+ }
+ /**
+ * Builds a promise that is resolved when all the passed in promises are
+ * resolved.
+ * @param {array} array of data and/or promises to wait for.
+ * @return {Promise} New dependant promise.
+ */
+ Promise.all = function Promise_all(promises) {
+ var resolveAll, rejectAll;
+ var deferred = new Promise(function (resolve, reject) {
+ resolveAll = resolve;
+ rejectAll = reject;
+ });
+ var unresolved = promises.length;
+ var results = [];
+ if (unresolved === 0) {
+ resolveAll(results);
+ return deferred;
+ }
+ function reject(reason) {
+ if (deferred._status === STATUS_REJECTED) {
+ return;
+ }
+ results = [];
+ rejectAll(reason);
+ }
+ for (var i = 0, ii = promises.length; i < ii; ++i) {
+ var promise = promises[i];
+ var resolve = (function(i) {
+ return function(value) {
+ if (deferred._status === STATUS_REJECTED) {
+ return;
+ }
+ results[i] = value;
+ unresolved--;
+ if (unresolved === 0) {
+ resolveAll(results);
+ }
+ };
+ })(i);
+ if (Promise.isPromise(promise)) {
+ promise.then(resolve, reject);
+ } else {
+ resolve(promise);
+ }
+ }
+ return deferred;
+ };
+
+ /**
+ * Checks if the value is likely a promise (has a 'then' function).
+ * @return {boolean} true if x is thenable
+ */
+ Promise.isPromise = function Promise_isPromise(value) {
+ return value && typeof value.then === 'function';
+ };
+ /**
+ * Creates resolved promise
+ * @param x resolve value
+ * @returns {Promise}
+ */
+ Promise.resolve = function Promise_resolve(x) {
+ return new Promise(function (resolve) { resolve(x); });
+ };
+
+ Promise.prototype = {
+ _status: null,
+ _value: null,
+ _handlers: null,
+ _unhandledRejection: null,
+
+ _updateStatus: function Promise__updateStatus(status, value) {
+ if (this._status === STATUS_RESOLVED ||
+ this._status === STATUS_REJECTED) {
+ return;
+ }
+
+ if (status == STATUS_RESOLVED &&
+ Promise.isPromise(value)) {
+ value.then(this._updateStatus.bind(this, STATUS_RESOLVED),
+ this._updateStatus.bind(this, STATUS_REJECTED));
+ return;
+ }
+
+ this._status = status;
+ this._value = value;
+
+ if (status === STATUS_REJECTED && this._handlers.length === 0) {
+ this._unhandledRejection = true;
+ HandlerManager.addUnhandledRejection(this);
+ }
+
+ HandlerManager.scheduleHandlers(this);
+ },
+
+ _resolve: function Promise_resolve(value) {
+ this._updateStatus(STATUS_RESOLVED, value);
+ },
+
+ _reject: function Promise_reject(reason) {
+ this._updateStatus(STATUS_REJECTED, reason);
+ },
+
+ then: function Promise_then(onResolve, onReject) {
+ var nextPromise = new Promise(function (resolve, reject) {
+ this.resolve = reject;
+ this.reject = reject;
+ });
+ this._handlers.push({
+ thisPromise: this,
+ onResolve: onResolve,
+ onReject: onReject,
+ nextPromise: nextPromise
+ });
+ HandlerManager.scheduleHandlers(this);
+ return nextPromise;
+ }
+ };
+
+ globalScope.Promise = Promise;
+})();
+
+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 times = this.times;
+ var out = '';
+ // Find the longest name for padding purposes.
+ var longest = 0;
+ for (var i = 0, ii = times.length; i < ii; ++i) {
+ var name = times[i]['name'];
+ if (name.length > longest) {
+ longest = name.length;
+ }
+ }
+ for (var 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;
+
+ 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);
+ for (var i = 0; i < numComponentColors; i++) {
+ allColors[i] = i;
+ }
+ var colorMap = new Uint8Array(numComponentColors * 3);
+ this.getRgbBuffer(allColors, 0, numComponentColors, colorMap, 0, bpc,
+ /* alpha01 = */ 0);
+
+ if (!needsResizing) {
+ // Fill in the RGB values directly into |dest|.
+ var destPos = 0;
+ for (var i = 0; i < count; ++i) {
+ var 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);
+ var rgbPos = 0;
+ for (var i = 0; i < count; ++i) {
+ var 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);
+ }
+ var rgbPos = 0;
+ var destPos = 0;
+ for (var 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;
+
+ switch (name) {
+ case 'DeviceGrayCS':
+ return this.singletons.gray;
+ case 'DeviceRgbCS':
+ return this.singletons.rgb;
+ case 'DeviceCmykCS':
+ return this.singletons.cmyk;
+ case 'CalGrayCS':
+ var whitePoint = IR[1].WhitePoint;
+ var 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':
+ var whitePoint = IR[1].WhitePoint;
+ var 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;
+
+ switch (mode) {
+ case 'DeviceGray':
+ case 'G':
+ return 'DeviceGrayCS';
+ case 'DeviceRGB':
+ case 'RGB':
+ return 'DeviceRgbCS';
+ case 'DeviceCMYK':
+ case 'CMYK':
+ return 'DeviceCmykCS';
+ case 'CalGray':
+ var params = cs[1].getAll();
+ return ['CalGrayCS', params];
+ case 'CalRGB':
+ return 'DeviceRgbCS';
+ case 'ICCBased':
+ var stream = xref.fetchIfRef(cs[1]);
+ var dict = stream.dict;
+ var 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];
+ var 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':
+ var 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);
+ for (var i = 0; i < count; i++) {
+ for (var j = 0; j < numComps; j++) {
+ scaled[j] = src[srcOffset++] * scale;
+ }
+ var tinted = tintFn(scaled);
+ if (usesZeroToOneRange) {
+ for (var 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;
+ 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;
+ 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;
+
+ 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 length = 1;
+ for (var 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 (var 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 outputLength = arr.length / 2;
+ 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);
+ for (var 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 (var 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 (var 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 (var j = 0; j < n; ++j) {
+ // Sum all cube vertices' samples portions
+ var rj = 0;
+ for (var 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');
+ 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++) {
+ if (!(+dashArray[i] >= 0)) {
+ isInvalid = true;
+ break;
+ } else if (dashArray[i] > 0) {
+ numPositive++;
+ }
+ }
+ if (isInvalid || numPositive === 0) {
+ data.borderWidth = 0;
+ }
+ }
+ }
+ }
+
+ this.appearance = getDefaultAppearance(dict);
+ data.hasAppearance = !!this.appearance;
+ }
+
+ 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);
+
+ var border = data.border;
+
+ 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') || new Dict();
+
+ // 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;
+ }
+
+
+ var parent = WidgetAnnotation.prototype;
+ 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;
+ var cssRules = 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 = [];
+ var argsArray = [];
+
+ // 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);
+ if (item.hasBgColor) {
+ var color = item.color;
+ var rgb = [];
+ for (var 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 (var 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);
+ }
+ };
+
+ var self = this;
+ 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;
+ var rect = item.rect;
+
+ 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);
+
+/*
+ * 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);
+
+/**
+ * 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 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 part.
+ *
+ * @typedef {Object} BidiText
+ * @property {string} str - text content.
+ * @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'.
+ * @property {number} x - x position of the text on the page.
+ * @property {number} y - y position of the text on the page.
+ * @property {number} angle - text rotation.
+ * @property {number} size - font size.
+ */
+
+/**
+ * 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 {Object} params A parameter object that supports:
+ * {
+ * canvasContext(required): A 2D context of a DOM Canvas object.,
+ * textLayer(optional): An object that has beginLayout, endLayout, and
+ * appendText functions.,
+ * imageLayer(optional): An object that has beginLayout, endLayout and
+ * appendImage functions.,
+ * 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.
+ * }.
+ * @return {RenderTask} An extended promise that is resolved when the page
+ * finishes rendering (see RenderTask).
+ */
+ 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 with the array of {@link BidiText}
+ * objects 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];
+ // Add the new chunk to the current operator list.
+ for (var 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 (var 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];
+ if (pageProxy.objs.hasData(id)) {
+ return;
+ }
+
+ switch (type) {
+ case 'JpegStream':
+ var imageData = data[3];
+ loadJpegStream(id, imageData, pageProxy.objs);
+ break;
+ case 'Image':
+ var 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 ('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;
+
+ if (components == 3) {
+ for (var 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 (var 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,
+ 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];
+ }
+ var 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;
+ },
+
+ 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'));
+ }
+ };
+
+ 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.textLayer,
+ 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 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, textLayer, 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.textLayer = textLayer;
+ 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;
+ var src = imgData.data;
+ var dest = chunkImgData.data;
+
+ // 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 destDataLength = dest.length;
+ var srcLength = src.byteLength;
+ for (var i = 3; i < destDataLength; i += 4) {
+ dest[i] = 255;
+ }
+ for (var i = 0; i < totalChunks; i++) {
+ var thisChunkHeight =
+ (i < fullChunks) ? fullChunkHeight : partialChunkHeight;
+ var destPos = 0;
+ for (var j = 0; j < thisChunkHeight; j++) {
+ var mask = 0;
+ var srcByte = 0;
+ for (var k = 0; k < width; k++, destPos += 4) {
+ if (mask === 0) {
+ if (srcPos >= srcLength) {
+ break;
+ }
+ srcByte = src[srcPos++];
+ mask = 128;
+ }
+
+ if ((srcByte & mask)) {
+ dest[destPos] = 255;
+ dest[destPos + 1] = 255;
+ dest[destPos + 2] = 255;
+ } else {
+ dest[destPos] = 0;
+ dest[destPos + 1] = 0;
+ dest[destPos + 2] = 0;
+ }
+
+ mask >>= 1;
+ }
+ }
+ if (destPos < destDataLength) {
+ // We ran out of input. Make all remaining pixels transparent.
+ destPos += 3;
+ do {
+ dest[destPos] = 0;
+ destPos += 4;
+ } while (destPos < destDataLength);
+ }
+
+ ctx.putImageData(chunkImgData, 0, i * fullChunkHeight);
+ }
+
+ } else if (imgData.kind === ImageKind.RGBA_32BPP) {
+ // RGBA, 32-bits per pixel.
+
+ for (var i = 0; i < totalChunks; i++) {
+ var thisChunkHeight =
+ (i < fullChunks) ? fullChunkHeight : partialChunkHeight;
+ var 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 (var i = 0; i < totalChunks; i++) {
+ var thisChunkHeight =
+ (i < fullChunks) ? fullChunkHeight : partialChunkHeight;
+ var elemsInThisChunk = imgData.width * thisChunkHeight * 3;
+ var destPos = 0;
+ for (var 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 composeSMask(ctx, smask, layerCtx) {
+ var mask = smask.canvas;
+ var maskCtx = smask.context;
+ var width = mask.width, height = mask.height;
+
+ var addBackdropFn;
+ if (smask.backdrop) {
+ var cs = smask.colorSpace || ColorSpace.singletons.rgb;
+ var backdrop = cs.getRgb(smask.backdrop, 0);
+ 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 (smask.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 chunkSize = 16;
+ 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);
+ }
+
+ ctx.setTransform(1, 0, 0, 1, 0, 0);
+ ctx.drawImage(mask, smask.offsetX, smask.offsetY);
+ }
+
+ 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.textLayer) {
+ this.textLayer.beginLayout();
+ }
+ 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 executionEndIdx;
+ 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();
+
+ if (this.textLayer) {
+ this.textLayer.endLayout();
+ }
+ 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.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) {
+ 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);
+ }
+ },
+ createTextGeometry: function CanvasGraphics_createTextGeometry() {
+ var geometry = {};
+ var ctx = this.ctx;
+ var font = this.current.font;
+ var ctxMatrix = ctx.mozCurrentTransform;
+ var a = ctxMatrix[0], b = ctxMatrix[1], c = ctxMatrix[2];
+ var d = ctxMatrix[3], e = ctxMatrix[4], f = ctxMatrix[5];
+ var sx = (a >= 0) ?
+ Math.sqrt((a * a) + (b * b)) : -Math.sqrt((a * a) + (b * b));
+ var sy = (d >= 0) ?
+ Math.sqrt((c * c) + (d * d)) : -Math.sqrt((c * c) + (d * d));
+ var angle = Math.atan2(b, a);
+ var x = e;
+ var y = f;
+ geometry.x = x;
+ geometry.y = y;
+ geometry.hScale = sx;
+ geometry.vScale = sy;
+ geometry.angle = angle;
+ geometry.spaceWidth = font.spaceWidth;
+ geometry.fontName = font.loadedName;
+ geometry.fontFamily = font.fallbackName;
+ geometry.fontSize = this.current.fontSize;
+ geometry.ascent = font.ascent;
+ geometry.descent = font.descent;
+ return geometry;
+ },
+
+ 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, skipTextSelection) {
+ 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 textLayer = this.textLayer;
+ var geom;
+ var textSelection = textLayer && !skipTextSelection ? true : false;
+ var canvasWidth = 0.0;
+ var vertical = font.vertical;
+ var defaultVMetrics = font.defaultVMetrics;
+
+ // 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);
+
+ if (textSelection) {
+ this.save();
+ ctx.scale(1, -1);
+ geom = this.createTextGeometry();
+ this.restore();
+ }
+ for (var i = 0; i < glyphsLength; ++i) {
+
+ var 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);
+ var width = (transformed[0] * fontSize + charSpacing) *
+ current.fontDirection;
+
+ ctx.translate(width, 0);
+ current.x += width * textHScale;
+
+ canvasWidth += width;
+ }
+ 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 (textSelection) {
+ geom = this.createTextGeometry();
+ }
+
+ if (fontSizeScale != 1.0) {
+ ctx.scale(fontSizeScale, fontSizeScale);
+ lineWidth /= fontSizeScale;
+ }
+
+ ctx.lineWidth = lineWidth;
+
+ var x = 0;
+ for (var i = 0; i < glyphsLength; ++i) {
+ var 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];
+ }
+ var 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;
+
+ canvasWidth += charWidth;
+
+ if (restoreNeeded) {
+ ctx.restore();
+ }
+ }
+ if (vertical) {
+ current.y -= x * textHScale;
+ } else {
+ current.x += x * textHScale;
+ }
+ ctx.restore();
+ }
+
+ if (textSelection) {
+ geom.canvasWidth = canvasWidth;
+ if (vertical) {
+ var VERTICAL_TEXT_ROTATION = Math.PI / 2;
+ geom.angle += VERTICAL_TEXT_ROTATION;
+ }
+ this.textLayer.appendText(geom);
+ }
+
+ return canvasWidth;
+ },
+ showSpacedText: function CanvasGraphics_showSpacedText(arr) {
+ var ctx = this.ctx;
+ 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 textLayer = this.textLayer;
+ var geom;
+ var canvasWidth = 0.0;
+ var textSelection = textLayer ? true : false;
+ var vertical = font.vertical;
+ var spacingAccumulator = 0;
+
+ if (textSelection) {
+ ctx.save();
+ this.applyTextTransforms();
+ geom = this.createTextGeometry();
+ ctx.restore();
+ }
+
+ 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;
+ }
+
+ if (textSelection) {
+ spacingAccumulator += spacingLength;
+ }
+ } else {
+ var shownCanvasWidth = this.showText(e, true);
+
+ if (textSelection) {
+ canvasWidth += spacingAccumulator + shownCanvasWidth;
+ spacingAccumulator = 0;
+ }
+ }
+ }
+
+ if (textSelection) {
+ geom.canvasWidth = canvasWidth;
+ if (vertical) {
+ var VERTICAL_TEXT_ROTATION = Math.PI / 2;
+ geom.angle += VERTICAL_TEXT_ROTATION;
+ }
+ this.textLayer.appendText(geom);
+ }
+ },
+ 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) {
+ if (IR[0] == 'TilingPattern') {
+ var args = IR[1];
+ var base = cs.base;
+ var color;
+ if (base) {
+ var baseComps = base.numComps;
+
+ color = base.getRgb(args, 0);
+ }
+ var pattern = new TilingPattern(IR, color, this.ctx, this.objs,
+ this.commonObjs, this.baseTransform);
+ } else {
+ var 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 drawnWidth = Math.max(Math.ceil(bounds[2] - bounds[0]), 1);
+ var drawnHeight = Math.max(Math.ceil(bounds[3] - bounds[1]), 1);
+
+ 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.
+ var offsetX = bounds[0];
+ var offsetY = bounds[1];
+ 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,
+ 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);
+ }
+ // 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) {
+ error('Dependent image isn\'t ready yet');
+ }
+
+ 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) {
+ error('Dependent image isn\'t ready yet');
+ }
+
+ this.paintInlineImageXObject(imgData);
+ },
+
+ paintImageXObjectRepeat:
+ function CanvasGraphics_paintImageXObjectRepeat(objId, scaleX, scaleY,
+ positions) {
+ var imgData = this.objs.get(objId);
+ if (!imgData) {
+ error('Dependent image isn\'t ready yet');
+ }
+
+ 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;
+ // instanceof HTMLElement does not work in jsdom node.js module
+ if (imgData instanceof HTMLElement || !imgData.data) {
+ imgToPaint = imgData;
+ } else {
+ var 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;
+ }
+ var 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();
+ }
+ },
+
+ // 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 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 * 2 + 1] > coords[p2 * 2 + 1]) {
+ tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp;
+ }
+ if (coords[p2 * 2 + 1] > coords[p3 * 2 + 1]) {
+ tmp = p2; p2 = p3; p3 = tmp; tmp = c2; c2 = c3; c3 = tmp;
+ }
+ if (coords[p1 * 2 + 1] > coords[p2 * 2 + 1]) {
+ tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp;
+ }
+ var x1 = (coords[p1 * 2] + context.offsetX) * context.scaleX;
+ var y1 = (coords[p1 * 2 + 1] + context.offsetY) * context.scaleY;
+ var x2 = (coords[p2 * 2] + context.offsetX) * context.scaleX;
+ var y2 = (coords[p2 * 2 + 1] + context.offsetY) * context.scaleY;
+ var x3 = (coords[p3 * 2] + context.offsetX) * context.scaleX;
+ var y3 = (coords[p3 * 2 + 1] + context.offsetY) * context.scaleY;
+ if (y1 >= y3) {
+ return;
+ }
+ var c1i = c1 * 3, c2i = c2 * 3, c3i = c3 * 3;
+ var c1r = colors[c1i], c1g = colors[c1i + 1], c1b = colors[c1i + 2];
+ var c2r = colors[c2i], c2g = colors[c2i + 1], c2b = colors[c2i + 2];
+ var c3r = colors[c3i], c3g = colors[c3i + 1], c3b = colors[c3i + 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;
+ switch (figure.type) {
+ case 'lattice':
+ var verticesPerRow = figure.verticesPerRow;
+ var rows = Math.floor(ps.length / verticesPerRow) - 1;
+ var cols = verticesPerRow - 1;
+ for (var 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 (var 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 boundsWidth = bounds[2] - bounds[0];
+ var boundsHeight = bounds[3] - bounds[1];
+
+ 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 = width / boundsWidth;
+ var scaleY = height / boundsHeight;
+
+ var tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false);
+ var tmpCtx = tmpCanvas.context;
+ if (backgroundColor) {
+ tmpCtx.fillStyle = makeCssRgb(backgroundColor);
+ tmpCtx.fillRect(0, 0, width, height);
+ }
+
+ var context = {
+ coords: coords,
+ colors: colors,
+ offsetX: -bounds[0],
+ offsetY: -bounds[1],
+ scaleX: scaleX,
+ scaleY: scaleY
+ };
+
+ var data = tmpCtx.getImageData(0, 0, width, height);
+ for (var i = 0; i < figures.length; i++) {
+ drawFigure(data, figures[i], context);
+ }
+ tmpCtx.putImageData(data, 0, 0);
+
+ return {canvas: tmpCanvas.canvas, scaleX: 1 / scaleX, scaleY: 1 / 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.
+ // TODO consider using WebGL or asm.js to perform rasterization
+ 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(bounds[0], bounds[1]);
+ 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;
+ var ctx = this.ctx;
+
+ 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);
+
+ var 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);
+ }
+ },
+ get loadTestFont() {
+ // This is a CFF font with 1 glyph for '.' that fills its entire width and
+ // height.
+ return shadow(this, 'loadTestFont', atob(
+ 'T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQAFQ' +
+ 'AABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAAALwA' +
+ 'AAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgAAAAGbm' +
+ 'FtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1AAsD6AAA' +
+ 'AADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD6AAAAAAD6A' +
+ 'ABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACMAooCvAAAAeAA' +
+ 'MQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4DIP84AFoDIQAAAA' +
+ 'AAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAAAAEAAQAAAAEAAAAA' +
+ 'AAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUAAQAAAAEAAAAAAAYAAQ' +
+ 'AAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgABAAMAAQQJAAMAAgABAAMA' +
+ 'AQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABYAAAAAAAAAwAAAAMAAAAcAA' +
+ 'EAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAAAC7////TAAEAAAAAAAABBgAA' +
+ 'AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAA' +
+ 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
+ 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
+ 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
+ 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAA' +
+ 'AAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAAAAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgc' +
+ 'A/gXBIwMAYuL+nz5tQXkD5j3CBLnEQACAQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWF' +
+ 'hYWFhYWFhYAAABAQAADwACAQEEE/t3Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQA' +
+ 'AAAAAAABAAAAAMmJbzEAAAAAzgTjFQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAg' +
+ 'ABAAAAAAAAAAAD6AAAAAAAAA=='
+ ));
+ },
+
+ loadTestFontId: 0,
+
+ loadingContext: {
+ requests: [],
+ nextRequestId: 0
+ },
+
+ isSyncFontLoadingSupported: (function detectSyncFontLoadingSupport() {
+ if (isWorker) {
+ return false;
+ }
+
+ // User agent string sniffing is bad, but there is no reliable way to tell
+ // if font is fully loaded and ready to be used with canvas.
+ var userAgent = window.navigator.userAgent;
+ var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(userAgent);
+ if (m && m[1] >= 14) {
+ return true;
+ }
+ // TODO other browsers
+ return false;
+ })(),
+
+ bind: function fontLoaderBind(fonts, callback) {
+ assert(!isWorker, 'bind() shall be called from main thread');
+
+ var rules = [], fontsToLoad = [];
+ for (var i = 0, ii = fonts.length; i < ii; i++) {
+ var font = fonts[i];
+
+ // Add the font to the DOM only once or skip if the font
+ // is already loaded.
+ if (font.attached || font.loading === false) {
+ continue;
+ }
+ font.attached = true;
+
+ var rule = font.bindDOM();
+ if (rule) {
+ rules.push(rule);
+ fontsToLoad.push(font);
+ }
+ }
+
+ var request = FontLoader.queueLoadingCallback(callback);
+ if (rules.length > 0 && !this.isSyncFontLoadingSupported) {
+ FontLoader.prepareFontLoadEvent(rules, fontsToLoad, request);
+ } else {
+ request.complete();
+ }
+ },
+
+ queueLoadingCallback: function FontLoader_queueLoadingCallback(callback) {
+ function LoadLoader_completeRequest() {
+ assert(!request.end, 'completeRequest() cannot be called twice');
+ request.end = Date.now();
+
+ // sending all completed requests in order how they were queued
+ while (context.requests.length > 0 && context.requests[0].end) {
+ var otherRequest = context.requests.shift();
+ setTimeout(otherRequest.callback, 0);
+ }
+ }
+
+ var context = FontLoader.loadingContext;
+ var requestId = 'pdfjs-font-loading-' + (context.nextRequestId++);
+ var request = {
+ id: requestId,
+ complete: LoadLoader_completeRequest,
+ callback: callback,
+ started: Date.now()
+ };
+ context.requests.push(request);
+ return request;
+ },
+
+ prepareFontLoadEvent: function fontLoaderPrepareFontLoadEvent(rules,
+ fonts,
+ request) {
+ /** Hack begin */
+ // There's currently no event when a font has finished downloading so the
+ // following code is a dirty hack to 'guess' when a font is
+ // ready. It's assumed fonts are loaded in order, so add a known test
+ // font after the desired fonts and then test for the loading of that
+ // test font.
+
+ function int32(data, offset) {
+ return (data.charCodeAt(offset) << 24) |
+ (data.charCodeAt(offset + 1) << 16) |
+ (data.charCodeAt(offset + 2) << 8) |
+ (data.charCodeAt(offset + 3) & 0xff);
+ }
+
+ function string32(value) {
+ return String.fromCharCode((value >> 24) & 0xff) +
+ String.fromCharCode((value >> 16) & 0xff) +
+ String.fromCharCode((value >> 8) & 0xff) +
+ String.fromCharCode(value & 0xff);
+ }
+
+ function spliceString(s, offset, remove, insert) {
+ var chunk1 = data.substr(0, offset);
+ var chunk2 = data.substr(offset + remove);
+ return chunk1 + insert + chunk2;
+ }
+
+ var i, ii;
+
+ var canvas = document.createElement('canvas');
+ canvas.width = 1;
+ canvas.height = 1;
+ var ctx = canvas.getContext('2d');
+
+ var called = 0;
+ function isFontReady(name, callback) {
+ called++;
+ // With setTimeout clamping this gives the font ~100ms to load.
+ if(called > 30) {
+ warn('Load test font never loaded.');
+ callback();
+ return;
+ }
+ ctx.font = '30px ' + name;
+ ctx.fillText('.', 0, 20);
+ var imageData = ctx.getImageData(0, 0, 1, 1);
+ if (imageData.data[3] > 0) {
+ callback();
+ return;
+ }
+ setTimeout(isFontReady.bind(null, name, callback));
+ }
+
+ var loadTestFontId = 'lt' + Date.now() + this.loadTestFontId++;
+ // Chromium seems to cache fonts based on a hash of the actual font data,
+ // so the font must be modified for each load test else it will appear to
+ // be loaded already.
+ // TODO: This could maybe be made faster by avoiding the btoa of the full
+ // font by splitting it in chunks before hand and padding the font id.
+ var data = this.loadTestFont;
+ var COMMENT_OFFSET = 976; // has to be on 4 byte boundary (for checksum)
+ data = spliceString(data, COMMENT_OFFSET, loadTestFontId.length,
+ loadTestFontId);
+ // CFF checksum is important for IE, adjusting it
+ var CFF_CHECKSUM_OFFSET = 16;
+ var XXXX_VALUE = 0x58585858; // the "comment" filled with 'X'
+ var checksum = int32(data, CFF_CHECKSUM_OFFSET);
+ for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) {
+ checksum = (checksum - XXXX_VALUE + int32(loadTestFontId, i)) | 0;
+ }
+ if (i < loadTestFontId.length) { // align to 4 bytes boundary
+ checksum = (checksum - XXXX_VALUE +
+ int32(loadTestFontId + 'XXX', i)) | 0;
+ }
+ data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, string32(checksum));
+
+ var url = 'url(data:font/opentype;base64,' + btoa(data) + ');';
+ var rule = '@font-face { font-family:"' + loadTestFontId + '";src:' +
+ url + '}';
+ FontLoader.insertRule(rule);
+
+ var names = [];
+ for (i = 0, ii = fonts.length; i < ii; i++) {
+ names.push(fonts[i].loadedName);
+ }
+ names.push(loadTestFontId);
+
+ var div = document.createElement('div');
+ div.setAttribute('style',
+ 'visibility: hidden;' +
+ 'width: 10px; height: 10px;' +
+ 'position: absolute; top: 0px; left: 0px;');
+ for (i = 0, ii = names.length; i < ii; ++i) {
+ var span = document.createElement('span');
+ span.textContent = 'Hi';
+ span.style.fontFamily = names[i];
+ div.appendChild(span);
+ }
+ document.body.appendChild(div);
+
+ isFontReady(loadTestFontId, function() {
+ document.body.removeChild(div);
+ request.complete();
+ });
+ /** Hack end */
+ }
+};
+
+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(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);
+
+if (!PDFJS.workerSrc && typeof document !== 'undefined') {
+ // workerSrc is not set -- using last script url to define default location
+ PDFJS.workerSrc = (function () {
+ 'use strict';
+ var scriptTagContainer = document.body ||
+ document.getElementsByTagName('head')[0];
+ var pdfjsSrc = scriptTagContainer.lastChild.src;
+ return pdfjsSrc && pdfjsSrc.replace(/\.js$/i, '.worker.js');
+ })();
+}
+
+
generated by cgit v1.3.1 (git 2.54.0) at 2026-08-02 06:46:06 +0000