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+/* 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.
+ */
+(function (root, factory) {
+ 'use strict';
+ if (typeof define === 'function' && define.amd) {
+ define('pdfjs-dist/build/pdf', ['exports'], factory);
+ } else if (typeof exports !== 'undefined') {
+ factory(exports);
+ } else {
+ factory(root['pdfjsDistBuildPdf'] = {});
+ }
+}(this, function (exports) {
+ // Use strict in our context only - users might not want it
+ 'use strict';
+ var pdfjsVersion = '1.6.315';
+ var pdfjsBuild = 'a139c75';
+ var pdfjsFilePath = typeof document !== 'undefined' && document.currentScript ? document.currentScript.src : null;
+ var pdfjsLibs = {};
+ (function pdfjsWrapper() {
+ (function (root, factory) {
+ factory(root.pdfjsSharedUtil = {});
+ }(this, function (exports) {
+ var globalScope = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : this;
+ 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
+ };
+ var AnnotationType = {
+ TEXT: 1,
+ LINK: 2,
+ FREETEXT: 3,
+ LINE: 4,
+ SQUARE: 5,
+ CIRCLE: 6,
+ POLYGON: 7,
+ POLYLINE: 8,
+ HIGHLIGHT: 9,
+ UNDERLINE: 10,
+ SQUIGGLY: 11,
+ STRIKEOUT: 12,
+ STAMP: 13,
+ CARET: 14,
+ INK: 15,
+ POPUP: 16,
+ FILEATTACHMENT: 17,
+ SOUND: 18,
+ MOVIE: 19,
+ WIDGET: 20,
+ SCREEN: 21,
+ PRINTERMARK: 22,
+ TRAPNET: 23,
+ WATERMARK: 24,
+ THREED: 25,
+ REDACT: 26
+ };
+ var AnnotationFlag = {
+ INVISIBLE: 0x01,
+ HIDDEN: 0x02,
+ PRINT: 0x04,
+ NOZOOM: 0x08,
+ NOROTATE: 0x10,
+ NOVIEW: 0x20,
+ READONLY: 0x40,
+ LOCKED: 0x80,
+ TOGGLENOVIEW: 0x100,
+ LOCKEDCONTENTS: 0x200
+ };
+ var AnnotationFieldFlag = {
+ READONLY: 0x0000001,
+ REQUIRED: 0x0000002,
+ NOEXPORT: 0x0000004,
+ MULTILINE: 0x0001000,
+ PASSWORD: 0x0002000,
+ NOTOGGLETOOFF: 0x0004000,
+ RADIO: 0x0008000,
+ PUSHBUTTON: 0x0010000,
+ COMBO: 0x0020000,
+ EDIT: 0x0040000,
+ SORT: 0x0080000,
+ FILESELECT: 0x0100000,
+ MULTISELECT: 0x0200000,
+ DONOTSPELLCHECK: 0x0400000,
+ DONOTSCROLL: 0x0800000,
+ COMB: 0x1000000,
+ RICHTEXT: 0x2000000,
+ RADIOSINUNISON: 0x2000000,
+ COMMITONSELCHANGE: 0x4000000
+ };
+ var AnnotationBorderStyleType = {
+ SOLID: 1,
+ DASHED: 2,
+ BEVELED: 3,
+ INSET: 4,
+ UNDERLINE: 5
+ };
+ var StreamType = {
+ UNKNOWN: 0,
+ FLATE: 1,
+ LZW: 2,
+ DCT: 3,
+ JPX: 4,
+ JBIG: 5,
+ A85: 6,
+ AHX: 7,
+ CCF: 8,
+ RL: 9
+ };
+ var FontType = {
+ UNKNOWN: 0,
+ TYPE1: 1,
+ TYPE1C: 2,
+ CIDFONTTYPE0: 3,
+ CIDFONTTYPE0C: 4,
+ TRUETYPE: 5,
+ CIDFONTTYPE2: 6,
+ TYPE3: 7,
+ OPENTYPE: 8,
+ TYPE0: 9,
+ MMTYPE1: 10
+ };
+ var VERBOSITY_LEVELS = {
+ errors: 0,
+ warnings: 1,
+ infos: 5
+ };
+ // All the possible operations for an operator list.
+ var OPS = {
+ // Intentionally start from 1 so it is easy to spot bad operators that will be
+ // 0's.
+ dependency: 1,
+ setLineWidth: 2,
+ setLineCap: 3,
+ setLineJoin: 4,
+ setMiterLimit: 5,
+ setDash: 6,
+ setRenderingIntent: 7,
+ setFlatness: 8,
+ setGState: 9,
+ save: 10,
+ restore: 11,
+ transform: 12,
+ moveTo: 13,
+ lineTo: 14,
+ curveTo: 15,
+ curveTo2: 16,
+ curveTo3: 17,
+ closePath: 18,
+ rectangle: 19,
+ stroke: 20,
+ closeStroke: 21,
+ fill: 22,
+ eoFill: 23,
+ fillStroke: 24,
+ eoFillStroke: 25,
+ closeFillStroke: 26,
+ closeEOFillStroke: 27,
+ endPath: 28,
+ clip: 29,
+ eoClip: 30,
+ beginText: 31,
+ endText: 32,
+ setCharSpacing: 33,
+ setWordSpacing: 34,
+ setHScale: 35,
+ setLeading: 36,
+ setFont: 37,
+ setTextRenderingMode: 38,
+ setTextRise: 39,
+ moveText: 40,
+ setLeadingMoveText: 41,
+ setTextMatrix: 42,
+ nextLine: 43,
+ showText: 44,
+ showSpacedText: 45,
+ nextLineShowText: 46,
+ nextLineSetSpacingShowText: 47,
+ setCharWidth: 48,
+ setCharWidthAndBounds: 49,
+ setStrokeColorSpace: 50,
+ setFillColorSpace: 51,
+ setStrokeColor: 52,
+ setStrokeColorN: 53,
+ setFillColor: 54,
+ setFillColorN: 55,
+ setStrokeGray: 56,
+ setFillGray: 57,
+ setStrokeRGBColor: 58,
+ setFillRGBColor: 59,
+ setStrokeCMYKColor: 60,
+ setFillCMYKColor: 61,
+ shadingFill: 62,
+ beginInlineImage: 63,
+ beginImageData: 64,
+ endInlineImage: 65,
+ paintXObject: 66,
+ markPoint: 67,
+ markPointProps: 68,
+ beginMarkedContent: 69,
+ beginMarkedContentProps: 70,
+ endMarkedContent: 71,
+ beginCompat: 72,
+ endCompat: 73,
+ paintFormXObjectBegin: 74,
+ paintFormXObjectEnd: 75,
+ beginGroup: 76,
+ endGroup: 77,
+ beginAnnotations: 78,
+ endAnnotations: 79,
+ beginAnnotation: 80,
+ endAnnotation: 81,
+ paintJpegXObject: 82,
+ paintImageMaskXObject: 83,
+ paintImageMaskXObjectGroup: 84,
+ paintImageXObject: 85,
+ paintInlineImageXObject: 86,
+ paintInlineImageXObjectGroup: 87,
+ paintImageXObjectRepeat: 88,
+ paintImageMaskXObjectRepeat: 89,
+ paintSolidColorImageMask: 90,
+ constructPath: 91
+ };
+ var verbosity = VERBOSITY_LEVELS.warnings;
+ function setVerbosityLevel(level) {
+ verbosity = level;
+ }
+ function getVerbosityLevel() {
+ return verbosity;
+ }
+ // 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 (verbosity >= VERBOSITY_LEVELS.infos) {
+ console.log('Info: ' + msg);
+ }
+ }
+ // Non-fatal warnings.
+ function warn(msg) {
+ if (verbosity >= VERBOSITY_LEVELS.warnings) {
+ console.log('Warning: ' + msg);
+ }
+ }
+ // Deprecated API function -- display regardless of the PDFJS.verbosity setting.
+ function deprecated(details) {
+ console.log('Deprecated API usage: ' + details);
+ }
+ // Fatal errors that should trigger the fallback UI and halt execution by
+ // throwing an exception.
+ function error(msg) {
+ if (verbosity >= VERBOSITY_LEVELS.errors) {
+ console.log('Error: ' + msg);
+ console.log(backtrace());
+ }
+ 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 = {
+ unknown: 'unknown',
+ forms: 'forms',
+ javaScript: 'javaScript',
+ smask: 'smask',
+ shadingPattern: 'shadingPattern',
+ font: 'font'
+ };
+ // Checks if URLs have the same origin. For non-HTTP based URLs, returns false.
+ function isSameOrigin(baseUrl, otherUrl) {
+ try {
+ var base = new URL(baseUrl);
+ if (!base.origin || base.origin === 'null') {
+ return false;
+ }
+ } // non-HTTP url
+ catch (e) {
+ return false;
+ }
+ var other = new URL(otherUrl, base);
+ return base.origin === other.origin;
+ }
+ // Checks if URLs use one of the whitelisted protocols, e.g. to avoid XSS.
+ function isValidProtocol(url) {
+ if (!url) {
+ return false;
+ }
+ switch (url.protocol) {
+ case 'http:':
+ case 'https:':
+ case 'ftp:':
+ case 'mailto:':
+ case 'tel:':
+ return true;
+ default:
+ return false;
+ }
+ }
+ /**
+ * Attempts to create a valid absolute URL (utilizing `isValidProtocol`).
+ * @param {URL|string} url - An absolute, or relative, URL.
+ * @param {URL|string} baseUrl - An absolute URL.
+ * @returns Either a valid {URL}, or `null` otherwise.
+ */
+ function createValidAbsoluteUrl(url, baseUrl) {
+ if (!url) {
+ return null;
+ }
+ try {
+ var absoluteUrl = baseUrl ? new URL(url, baseUrl) : new URL(url);
+ if (isValidProtocol(absoluteUrl)) {
+ return absoluteUrl;
+ }
+ } catch (ex) {
+ }
+ return null;
+ }
+ function shadow(obj, prop, value) {
+ Object.defineProperty(obj, prop, {
+ value: value,
+ enumerable: true,
+ configurable: true,
+ writable: false
+ });
+ return value;
+ }
+ function getLookupTableFactory(initializer) {
+ var lookup;
+ return function () {
+ if (initializer) {
+ lookup = Object.create(null);
+ initializer(lookup);
+ initializer = null;
+ }
+ return lookup;
+ };
+ }
+ var 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 UnexpectedResponseException = function UnexpectedResponseExceptionClosure() {
+ function UnexpectedResponseException(msg, status) {
+ this.name = 'UnexpectedResponseException';
+ this.message = msg;
+ this.status = status;
+ }
+ UnexpectedResponseException.prototype = new Error();
+ UnexpectedResponseException.constructor = UnexpectedResponseException;
+ return UnexpectedResponseException;
+ }();
+ 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;
+ }();
+ var NullCharactersRegExp = /\x00/g;
+ function removeNullCharacters(str) {
+ if (typeof str !== 'string') {
+ warn('The argument for removeNullCharacters must be a string.');
+ return str;
+ }
+ return str.replace(NullCharactersRegExp, '');
+ }
+ function bytesToString(bytes) {
+ assert(bytes !== null && typeof bytes === 'object' && bytes.length !== undefined, 'Invalid argument for bytesToString');
+ var length = bytes.length;
+ var MAX_ARGUMENT_COUNT = 8192;
+ if (length < MAX_ARGUMENT_COUNT) {
+ return String.fromCharCode.apply(null, bytes);
+ }
+ var strBuf = [];
+ for (var i = 0; i < length; i += MAX_ARGUMENT_COUNT) {
+ var chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length);
+ var chunk = bytes.subarray(i, chunkEnd);
+ strBuf.push(String.fromCharCode.apply(null, chunk));
+ }
+ return strBuf.join('');
+ }
+ function stringToBytes(str) {
+ assert(typeof str === 'string', 'Invalid argument for stringToBytes');
+ var length = str.length;
+ var bytes = new Uint8Array(length);
+ for (var i = 0; i < length; ++i) {
+ bytes[i] = str.charCodeAt(i) & 0xFF;
+ }
+ return bytes;
+ }
+ /**
+ * Gets length of the array (Array, Uint8Array, or string) in bytes.
+ * @param {Array|Uint8Array|string} arr
+ * @returns {number}
+ */
+ function arrayByteLength(arr) {
+ if (arr.length !== undefined) {
+ return arr.length;
+ }
+ assert(arr.byteLength !== undefined);
+ return arr.byteLength;
+ }
+ /**
+ * Combines array items (arrays) into single Uint8Array object.
+ * @param {Array} arr - the array of the arrays (Array, Uint8Array, or string).
+ * @returns {Uint8Array}
+ */
+ function arraysToBytes(arr) {
+ // Shortcut: if first and only item is Uint8Array, return it.
+ if (arr.length === 1 && arr[0] instanceof Uint8Array) {
+ return arr[0];
+ }
+ var resultLength = 0;
+ var i, ii = arr.length;
+ var item, itemLength;
+ for (i = 0; i < ii; i++) {
+ item = arr[i];
+ itemLength = arrayByteLength(item);
+ resultLength += itemLength;
+ }
+ var pos = 0;
+ var data = new Uint8Array(resultLength);
+ for (i = 0; i < ii; i++) {
+ item = arr[i];
+ if (!(item instanceof Uint8Array)) {
+ if (typeof item === 'string') {
+ item = stringToBytes(item);
+ } else {
+ item = new Uint8Array(item);
+ }
+ }
+ itemLength = item.byteLength;
+ data.set(item, pos);
+ pos += itemLength;
+ }
+ return data;
+ }
+ function string32(value) {
+ return String.fromCharCode(value >> 24 & 0xff, value >> 16 & 0xff, value >> 8 & 0xff, value & 0xff);
+ }
+ function log2(x) {
+ var n = 1, i = 0;
+ while (x > n) {
+ n <<= 1;
+ i++;
+ }
+ return i;
+ }
+ function readInt8(data, start) {
+ return data[start] << 24 >> 24;
+ }
+ function readUint16(data, offset) {
+ return data[offset] << 8 | data[offset + 1];
+ }
+ function readUint32(data, offset) {
+ return (data[offset] << 24 | data[offset + 1] << 16 | data[offset + 2] << 8 | data[offset + 3]) >>> 0;
+ }
+ // Lazy test the endianness of the platform
+ // NOTE: This will be 'true' for simulated TypedArrays
+ function isLittleEndian() {
+ var buffer8 = new Uint8Array(2);
+ buffer8[0] = 1;
+ var buffer16 = new Uint16Array(buffer8.buffer);
+ return buffer16[0] === 1;
+ }
+ // Checks if it's possible to eval JS expressions.
+ function isEvalSupported() {
+ try {
+ new Function('');
+ return true;
+ } catch (e) {
+ return false;
+ }
+ }
+ var IDENTITY_MATRIX = [
+ 1,
+ 0,
+ 0,
+ 1,
+ 0,
+ 0
+ ];
+ var Util = function UtilClosure() {
+ function Util() {
+ }
+ var rgbBuf = [
+ 'rgb(',
+ 0,
+ ',',
+ 0,
+ ',',
+ 0,
+ ')'
+ ];
+ // makeCssRgb() can be called thousands of times. Using |rgbBuf| avoids
+ // creating many intermediate strings.
+ Util.makeCssRgb = function Util_makeCssRgb(r, g, b) {
+ rgbBuf[1] = r;
+ rgbBuf[3] = g;
+ rgbBuf[5] = b;
+ return rgbBuf.join('');
+ };
+ // 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;
+ };
+ var ROMAN_NUMBER_MAP = [
+ '',
+ 'C',
+ 'CC',
+ 'CCC',
+ 'CD',
+ 'D',
+ 'DC',
+ 'DCC',
+ 'DCCC',
+ 'CM',
+ '',
+ 'X',
+ 'XX',
+ 'XXX',
+ 'XL',
+ 'L',
+ 'LX',
+ 'LXX',
+ 'LXXX',
+ 'XC',
+ '',
+ 'I',
+ 'II',
+ 'III',
+ 'IV',
+ 'V',
+ 'VI',
+ 'VII',
+ 'VIII',
+ 'IX'
+ ];
+ /**
+ * Converts positive integers to (upper case) Roman numerals.
+ * @param {integer} number - The number that should be converted.
+ * @param {boolean} lowerCase - Indicates if the result should be converted
+ * to lower case letters. The default is false.
+ * @return {string} The resulting Roman number.
+ */
+ Util.toRoman = function Util_toRoman(number, lowerCase) {
+ assert(isInt(number) && number > 0, 'The number should be a positive integer.');
+ var pos, romanBuf = [];
+ // Thousands
+ while (number >= 1000) {
+ number -= 1000;
+ romanBuf.push('M');
+ }
+ // Hundreds
+ pos = number / 100 | 0;
+ number %= 100;
+ romanBuf.push(ROMAN_NUMBER_MAP[pos]);
+ // Tens
+ pos = number / 10 | 0;
+ number %= 10;
+ romanBuf.push(ROMAN_NUMBER_MAP[10 + pos]);
+ // Ones
+ romanBuf.push(ROMAN_NUMBER_MAP[20 + number]);
+ var romanStr = romanBuf.join('');
+ return lowerCase ? romanStr.toLowerCase() : romanStr;
+ };
+ Util.appendToArray = function Util_appendToArray(arr1, arr2) {
+ Array.prototype.push.apply(arr1, arr2);
+ };
+ Util.prependToArray = function Util_prependToArray(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, getArray) {
+ while (dict && !dict.has(name)) {
+ dict = dict.get('Parent');
+ }
+ if (!dict) {
+ return null;
+ }
+ return getArray ? dict.getArray(name) : 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;
+ }();
+ /**
+ * PDF page viewport created based on scale, rotation and offset.
+ * @class
+ * @alias PageViewport
+ */
+ var PageViewport = function PageViewportClosure() {
+ /**
+ * @constructor
+ * @private
+ * @param viewBox {Array} xMin, yMin, xMax and yMax coordinates.
+ * @param scale {number} scale of the viewport.
+ * @param rotation {number} rotations of the viewport in degrees.
+ * @param offsetX {number} offset X
+ * @param offsetY {number} offset Y
+ * @param dontFlip {boolean} if true, axis Y will not be flipped.
+ */
+ 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 = /** @lends PageViewport.prototype */
+ {
+ /**
+ * Clones viewport with additional properties.
+ * @param args {Object} (optional) If specified, may contain the 'scale' or
+ * 'rotation' properties to override the corresponding properties in
+ * the cloned viewport.
+ * @returns {PageViewport} Cloned viewport.
+ */
+ 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);
+ },
+ /**
+ * Converts PDF point to the viewport coordinates. For examples, useful for
+ * converting PDF location into canvas pixel coordinates.
+ * @param x {number} X coordinate.
+ * @param y {number} Y coordinate.
+ * @returns {Object} Object that contains 'x' and 'y' properties of the
+ * point in the viewport coordinate space.
+ * @see {@link convertToPdfPoint}
+ * @see {@link convertToViewportRectangle}
+ */
+ convertToViewportPoint: function PageViewport_convertToViewportPoint(x, y) {
+ return Util.applyTransform([
+ x,
+ y
+ ], this.transform);
+ },
+ /**
+ * Converts PDF rectangle to the viewport coordinates.
+ * @param rect {Array} xMin, yMin, xMax and yMax coordinates.
+ * @returns {Array} Contains corresponding coordinates of the rectangle
+ * in the viewport coordinate space.
+ * @see {@link convertToViewportPoint}
+ */
+ 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]
+ ];
+ },
+ /**
+ * Converts viewport coordinates to the PDF location. For examples, useful
+ * for converting canvas pixel location into PDF one.
+ * @param x {number} X coordinate.
+ * @param y {number} Y coordinate.
+ * @returns {Object} Object that contains 'x' and 'y' properties of the
+ * point in the PDF coordinate space.
+ * @see {@link convertToViewportPoint}
+ */
+ 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 utf8StringToString(str) {
+ return unescape(encodeURIComponent(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 isArray(v) {
+ return v instanceof Array;
+ }
+ function isArrayBuffer(v) {
+ return typeof v === 'object' && v !== null && v.byteLength !== undefined;
+ }
+ // Checks if ch is one of the following characters: SPACE, TAB, CR or LF.
+ function isSpace(ch) {
+ return ch === 0x20 || ch === 0x09 || ch === 0x0D || ch === 0x0A;
+ }
+ /**
+ * Promise Capability object.
+ *
+ * @typedef {Object} PromiseCapability
+ * @property {Promise} promise - A promise object.
+ * @property {function} resolve - Fulfills the promise.
+ * @property {function} reject - Rejects the promise.
+ */
+ /**
+ * Creates a promise capability object.
+ * @alias createPromiseCapability
+ *
+ * @return {PromiseCapability} A capability object contains:
+ * - a Promise, resolve and reject methods.
+ */
+ function createPromiseCapability() {
+ var capability = {};
+ capability.promise = new Promise(function (resolve, reject) {
+ capability.resolve = resolve;
+ capability.reject = reject;
+ });
+ return capability;
+ }
+ /**
+ * Polyfill for Promises:
+ * The following promise implementation tries to generally implement the
+ * Promise/A+ spec. Some notable differences from other promise libraries are:
+ * - There currently isn't a separate 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 (value) {
+ return new globalScope.Promise(function (resolve) {
+ resolve(value);
+ });
+ };
+ }
+ if (typeof globalScope.Promise.reject !== 'function') {
+ globalScope.Promise.reject = function (reason) {
+ return new globalScope.Promise(function (resolve, reject) {
+ reject(reason);
+ });
+ };
+ }
+ if (typeof globalScope.Promise.prototype.catch !== 'function') {
+ globalScope.Promise.prototype.catch = function (onReject) {
+ return globalScope.Promise.prototype.then(undefined, onReject);
+ };
+ }
+ return;
+ }
+ throw new Error('DOM Promise is not present');
+ }());
+ var StatTimer = function StatTimerClosure() {
+ function rpad(str, pad, length) {
+ while (str.length < length) {
+ str += pad;
+ }
+ return str;
+ }
+ function StatTimer() {
+ this.started = Object.create(null);
+ this.times = [];
+ this.enabled = true;
+ }
+ StatTimer.prototype = {
+ time: function StatTimer_time(name) {
+ if (!this.enabled) {
+ return;
+ }
+ if (name in this.started) {
+ warn('Timer is already running for ' + name);
+ }
+ this.started[name] = Date.now();
+ },
+ timeEnd: function StatTimer_timeEnd(name) {
+ if (!this.enabled) {
+ return;
+ }
+ if (!(name in this.started)) {
+ warn('Timer has not been started for ' + name);
+ }
+ this.times.push({
+ 'name': name,
+ 'start': this.started[name],
+ 'end': Date.now()
+ });
+ // Remove timer from started so it can be called again.
+ delete this.started[name];
+ },
+ toString: function StatTimer_toString() {
+ var i, ii;
+ var times = this.times;
+ var out = '';
+ // Find the longest name for padding purposes.
+ var longest = 0;
+ for (i = 0, ii = times.length; i < ii; ++i) {
+ var name = times[i]['name'];
+ if (name.length > longest) {
+ longest = name.length;
+ }
+ }
+ for (i = 0, ii = times.length; i < ii; ++i) {
+ var span = times[i];
+ var duration = span.end - span.start;
+ out += rpad(span['name'], ' ', longest) + ' ' + duration + 'ms\n';
+ }
+ return out;
+ }
+ };
+ return StatTimer;
+ }();
+ var createBlob = function createBlob(data, contentType) {
+ if (typeof Blob !== 'undefined') {
+ return new Blob([data], { type: contentType });
+ }
+ warn('The "Blob" constructor is not supported.');
+ };
+ var createObjectURL = function createObjectURLClosure() {
+ // Blob/createObjectURL is not available, falling back to data schema.
+ var digits = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+ return function createObjectURL(data, contentType, forceDataSchema) {
+ if (!forceDataSchema && typeof URL !== 'undefined' && URL.createObjectURL) {
+ var blob = 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(sourceName, targetName, comObj) {
+ this.sourceName = sourceName;
+ this.targetName = targetName;
+ this.comObj = comObj;
+ this.callbackIndex = 1;
+ this.postMessageTransfers = true;
+ var callbacksCapabilities = this.callbacksCapabilities = Object.create(null);
+ var ah = this.actionHandler = Object.create(null);
+ this._onComObjOnMessage = function messageHandlerComObjOnMessage(event) {
+ var data = event.data;
+ if (data.targetName !== this.sourceName) {
+ return;
+ }
+ if (data.isReply) {
+ var callbackId = data.callbackId;
+ if (data.callbackId in callbacksCapabilities) {
+ var callback = callbacksCapabilities[callbackId];
+ delete callbacksCapabilities[callbackId];
+ if ('error' in data) {
+ callback.reject(data.error);
+ } else {
+ callback.resolve(data.data);
+ }
+ } else {
+ error('Cannot resolve callback ' + callbackId);
+ }
+ } else if (data.action in ah) {
+ var action = ah[data.action];
+ if (data.callbackId) {
+ var sourceName = this.sourceName;
+ var targetName = data.sourceName;
+ Promise.resolve().then(function () {
+ return action[0].call(action[1], data.data);
+ }).then(function (result) {
+ comObj.postMessage({
+ sourceName: sourceName,
+ targetName: targetName,
+ isReply: true,
+ callbackId: data.callbackId,
+ data: result
+ });
+ }, function (reason) {
+ if (reason instanceof Error) {
+ // Serialize error to avoid "DataCloneError"
+ reason = reason + '';
+ }
+ comObj.postMessage({
+ sourceName: sourceName,
+ targetName: targetName,
+ isReply: true,
+ callbackId: data.callbackId,
+ error: reason
+ });
+ });
+ } else {
+ action[0].call(action[1], data.data);
+ }
+ } else {
+ error('Unknown action from worker: ' + data.action);
+ }
+ }.bind(this);
+ comObj.addEventListener('message', this._onComObjOnMessage);
+ }
+ 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 {Array} [transfers] Optional list of transfers/ArrayBuffers
+ */
+ send: function messageHandlerSend(actionName, data, transfers) {
+ var message = {
+ sourceName: this.sourceName,
+ targetName: this.targetName,
+ action: actionName,
+ data: data
+ };
+ this.postMessage(message, transfers);
+ },
+ /**
+ * Sends a message to the comObj to invoke the action with the supplied data.
+ * Expects that other side will callback with the response.
+ * @param {String} actionName Action to call.
+ * @param {JSON} data JSON data to send.
+ * @param {Array} [transfers] Optional list of transfers/ArrayBuffers.
+ * @returns {Promise} Promise to be resolved with response data.
+ */
+ sendWithPromise: function messageHandlerSendWithPromise(actionName, data, transfers) {
+ var callbackId = this.callbackIndex++;
+ var message = {
+ sourceName: this.sourceName,
+ targetName: this.targetName,
+ action: actionName,
+ data: data,
+ callbackId: callbackId
+ };
+ var capability = createPromiseCapability();
+ this.callbacksCapabilities[callbackId] = capability;
+ try {
+ this.postMessage(message, transfers);
+ } catch (e) {
+ capability.reject(e);
+ }
+ return capability.promise;
+ },
+ /**
+ * Sends raw message to the comObj.
+ * @private
+ * @param message {Object} Raw message.
+ * @param transfers List of transfers/ArrayBuffers, or undefined.
+ */
+ postMessage: function (message, transfers) {
+ if (transfers && this.postMessageTransfers) {
+ this.comObj.postMessage(message, transfers);
+ } else {
+ this.comObj.postMessage(message);
+ }
+ },
+ destroy: function () {
+ this.comObj.removeEventListener('message', this._onComObjOnMessage);
+ }
+ };
+ function loadJpegStream(id, imageUrl, objs) {
+ var img = new Image();
+ img.onload = function loadJpegStream_onloadClosure() {
+ objs.resolve(id, img);
+ };
+ img.onerror = function loadJpegStream_onerrorClosure() {
+ objs.resolve(id, null);
+ warn('Error during JPEG image loading');
+ };
+ img.src = imageUrl;
+ }
+ exports.FONT_IDENTITY_MATRIX = FONT_IDENTITY_MATRIX;
+ exports.IDENTITY_MATRIX = IDENTITY_MATRIX;
+ exports.OPS = OPS;
+ exports.VERBOSITY_LEVELS = VERBOSITY_LEVELS;
+ exports.UNSUPPORTED_FEATURES = UNSUPPORTED_FEATURES;
+ exports.AnnotationBorderStyleType = AnnotationBorderStyleType;
+ exports.AnnotationFieldFlag = AnnotationFieldFlag;
+ exports.AnnotationFlag = AnnotationFlag;
+ exports.AnnotationType = AnnotationType;
+ exports.FontType = FontType;
+ exports.ImageKind = ImageKind;
+ exports.InvalidPDFException = InvalidPDFException;
+ exports.MessageHandler = MessageHandler;
+ exports.MissingDataException = MissingDataException;
+ exports.MissingPDFException = MissingPDFException;
+ exports.NotImplementedException = NotImplementedException;
+ exports.PageViewport = PageViewport;
+ exports.PasswordException = PasswordException;
+ exports.PasswordResponses = PasswordResponses;
+ exports.StatTimer = StatTimer;
+ exports.StreamType = StreamType;
+ exports.TextRenderingMode = TextRenderingMode;
+ exports.UnexpectedResponseException = UnexpectedResponseException;
+ exports.UnknownErrorException = UnknownErrorException;
+ exports.Util = Util;
+ exports.XRefParseException = XRefParseException;
+ exports.arrayByteLength = arrayByteLength;
+ exports.arraysToBytes = arraysToBytes;
+ exports.assert = assert;
+ exports.bytesToString = bytesToString;
+ exports.createBlob = createBlob;
+ exports.createPromiseCapability = createPromiseCapability;
+ exports.createObjectURL = createObjectURL;
+ exports.deprecated = deprecated;
+ exports.error = error;
+ exports.getLookupTableFactory = getLookupTableFactory;
+ exports.getVerbosityLevel = getVerbosityLevel;
+ exports.globalScope = globalScope;
+ exports.info = info;
+ exports.isArray = isArray;
+ exports.isArrayBuffer = isArrayBuffer;
+ exports.isBool = isBool;
+ exports.isEmptyObj = isEmptyObj;
+ exports.isInt = isInt;
+ exports.isNum = isNum;
+ exports.isString = isString;
+ exports.isSpace = isSpace;
+ exports.isSameOrigin = isSameOrigin;
+ exports.createValidAbsoluteUrl = createValidAbsoluteUrl;
+ exports.isLittleEndian = isLittleEndian;
+ exports.isEvalSupported = isEvalSupported;
+ exports.loadJpegStream = loadJpegStream;
+ exports.log2 = log2;
+ exports.readInt8 = readInt8;
+ exports.readUint16 = readUint16;
+ exports.readUint32 = readUint32;
+ exports.removeNullCharacters = removeNullCharacters;
+ exports.setVerbosityLevel = setVerbosityLevel;
+ exports.shadow = shadow;
+ exports.string32 = string32;
+ exports.stringToBytes = stringToBytes;
+ exports.stringToPDFString = stringToPDFString;
+ exports.stringToUTF8String = stringToUTF8String;
+ exports.utf8StringToString = utf8StringToString;
+ exports.warn = warn;
+ }));
+ (function (root, factory) {
+ factory(root.pdfjsDisplayDOMUtils = {}, root.pdfjsSharedUtil);
+ }(this, function (exports, sharedUtil) {
+ var removeNullCharacters = sharedUtil.removeNullCharacters;
+ var warn = sharedUtil.warn;
+ var deprecated = sharedUtil.deprecated;
+ var createValidAbsoluteUrl = sharedUtil.createValidAbsoluteUrl;
+ /**
+ * Optimised CSS custom property getter/setter.
+ * @class
+ */
+ var CustomStyle = function CustomStyleClosure() {
+ // As noted on: http://www.zachstronaut.com/posts/2009/02/17/
+ // animate-css-transforms-firefox-webkit.html
+ // in some versions of IE9 it is critical that ms appear in this list
+ // before Moz
+ var prefixes = [
+ 'ms',
+ 'Moz',
+ 'Webkit',
+ 'O'
+ ];
+ var _cache = Object.create(null);
+ function CustomStyle() {
+ }
+ CustomStyle.getProp = function get(propName, element) {
+ // check cache only when no element is given
+ if (arguments.length === 1 && typeof _cache[propName] === 'string') {
+ return _cache[propName];
+ }
+ element = element || document.documentElement;
+ var style = element.style, prefixed, uPropName;
+ // test standard property first
+ if (typeof style[propName] === 'string') {
+ return _cache[propName] = propName;
+ }
+ // capitalize
+ uPropName = propName.charAt(0).toUpperCase() + propName.slice(1);
+ // test vendor specific properties
+ for (var i = 0, l = prefixes.length; i < l; i++) {
+ prefixed = prefixes[i] + uPropName;
+ if (typeof style[prefixed] === 'string') {
+ return _cache[propName] = prefixed;
+ }
+ }
+ //if all fails then set to undefined
+ return _cache[propName] = 'undefined';
+ };
+ CustomStyle.setProp = function set(propName, element, str) {
+ var prop = this.getProp(propName);
+ if (prop !== 'undefined') {
+ element.style[prop] = str;
+ }
+ };
+ return CustomStyle;
+ }();
+ var hasCanvasTypedArrays;
+ hasCanvasTypedArrays = function () {
+ return true;
+ };
+ var LinkTarget = {
+ NONE: 0,
+ // Default value.
+ SELF: 1,
+ BLANK: 2,
+ PARENT: 3,
+ TOP: 4
+ };
+ var LinkTargetStringMap = [
+ '',
+ '_self',
+ '_blank',
+ '_parent',
+ '_top'
+ ];
+ /**
+ * @typedef ExternalLinkParameters
+ * @typedef {Object} ExternalLinkParameters
+ * @property {string} url - An absolute URL.
+ * @property {LinkTarget} target - The link target.
+ * @property {string} rel - The link relationship.
+ */
+ /**
+ * Adds various attributes (href, title, target, rel) to hyperlinks.
+ * @param {HTMLLinkElement} link - The link element.
+ * @param {ExternalLinkParameters} params
+ */
+ function addLinkAttributes(link, params) {
+ var url = params && params.url;
+ link.href = link.title = url ? removeNullCharacters(url) : '';
+ if (url) {
+ var target = params.target;
+ if (typeof target === 'undefined') {
+ target = getDefaultSetting('externalLinkTarget');
+ }
+ link.target = LinkTargetStringMap[target];
+ var rel = params.rel;
+ if (typeof rel === 'undefined') {
+ rel = getDefaultSetting('externalLinkRel');
+ }
+ link.rel = rel;
+ }
+ }
+ // Gets the file name from a given URL.
+ function getFilenameFromUrl(url) {
+ var anchor = url.indexOf('#');
+ var query = url.indexOf('?');
+ var end = Math.min(anchor > 0 ? anchor : url.length, query > 0 ? query : url.length);
+ return url.substring(url.lastIndexOf('/', end) + 1, end);
+ }
+ function getDefaultSetting(id) {
+ // The list of the settings and their default is maintained for backward
+ // compatibility and shall not be extended or modified. See also global.js.
+ var globalSettings = sharedUtil.globalScope.PDFJS;
+ switch (id) {
+ case 'pdfBug':
+ return globalSettings ? globalSettings.pdfBug : false;
+ case 'disableAutoFetch':
+ return globalSettings ? globalSettings.disableAutoFetch : false;
+ case 'disableStream':
+ return globalSettings ? globalSettings.disableStream : false;
+ case 'disableRange':
+ return globalSettings ? globalSettings.disableRange : false;
+ case 'disableFontFace':
+ return globalSettings ? globalSettings.disableFontFace : false;
+ case 'disableCreateObjectURL':
+ return globalSettings ? globalSettings.disableCreateObjectURL : false;
+ case 'disableWebGL':
+ return globalSettings ? globalSettings.disableWebGL : true;
+ case 'cMapUrl':
+ return globalSettings ? globalSettings.cMapUrl : null;
+ case 'cMapPacked':
+ return globalSettings ? globalSettings.cMapPacked : false;
+ case 'postMessageTransfers':
+ return globalSettings ? globalSettings.postMessageTransfers : true;
+ case 'workerSrc':
+ return globalSettings ? globalSettings.workerSrc : null;
+ case 'disableWorker':
+ return globalSettings ? globalSettings.disableWorker : false;
+ case 'maxImageSize':
+ return globalSettings ? globalSettings.maxImageSize : -1;
+ case 'imageResourcesPath':
+ return globalSettings ? globalSettings.imageResourcesPath : '';
+ case 'isEvalSupported':
+ return globalSettings ? globalSettings.isEvalSupported : true;
+ case 'externalLinkTarget':
+ if (!globalSettings) {
+ return LinkTarget.NONE;
+ }
+ switch (globalSettings.externalLinkTarget) {
+ case LinkTarget.NONE:
+ case LinkTarget.SELF:
+ case LinkTarget.BLANK:
+ case LinkTarget.PARENT:
+ case LinkTarget.TOP:
+ return globalSettings.externalLinkTarget;
+ }
+ warn('PDFJS.externalLinkTarget is invalid: ' + globalSettings.externalLinkTarget);
+ // Reset the external link target, to suppress further warnings.
+ globalSettings.externalLinkTarget = LinkTarget.NONE;
+ return LinkTarget.NONE;
+ case 'externalLinkRel':
+ return globalSettings ? globalSettings.externalLinkRel : 'noreferrer';
+ case 'enableStats':
+ return !!(globalSettings && globalSettings.enableStats);
+ default:
+ throw new Error('Unknown default setting: ' + id);
+ }
+ }
+ function isExternalLinkTargetSet() {
+ var externalLinkTarget = getDefaultSetting('externalLinkTarget');
+ switch (externalLinkTarget) {
+ case LinkTarget.NONE:
+ return false;
+ case LinkTarget.SELF:
+ case LinkTarget.BLANK:
+ case LinkTarget.PARENT:
+ case LinkTarget.TOP:
+ return true;
+ }
+ }
+ function isValidUrl(url, allowRelative) {
+ deprecated('isValidUrl(), please use createValidAbsoluteUrl() instead.');
+ var baseUrl = allowRelative ? 'http://example.com' : null;
+ return createValidAbsoluteUrl(url, baseUrl) !== null;
+ }
+ exports.CustomStyle = CustomStyle;
+ exports.addLinkAttributes = addLinkAttributes;
+ exports.isExternalLinkTargetSet = isExternalLinkTargetSet;
+ exports.isValidUrl = isValidUrl;
+ exports.getFilenameFromUrl = getFilenameFromUrl;
+ exports.LinkTarget = LinkTarget;
+ exports.hasCanvasTypedArrays = hasCanvasTypedArrays;
+ exports.getDefaultSetting = getDefaultSetting;
+ }));
+ (function (root, factory) {
+ factory(root.pdfjsDisplayFontLoader = {}, root.pdfjsSharedUtil);
+ }(this, function (exports, sharedUtil) {
+ var assert = sharedUtil.assert;
+ var bytesToString = sharedUtil.bytesToString;
+ var string32 = sharedUtil.string32;
+ var shadow = sharedUtil.shadow;
+ var warn = sharedUtil.warn;
+ function FontLoader(docId) {
+ this.docId = docId;
+ this.styleElement = null;
+ }
+ FontLoader.prototype = {
+ insertRule: function fontLoaderInsertRule(rule) {
+ var styleElement = this.styleElement;
+ if (!styleElement) {
+ styleElement = this.styleElement = document.createElement('style');
+ styleElement.id = 'PDFJS_FONT_STYLE_TAG_' + this.docId;
+ document.documentElement.getElementsByTagName('head')[0].appendChild(styleElement);
+ }
+ var styleSheet = styleElement.sheet;
+ styleSheet.insertRule(rule, styleSheet.cssRules.length);
+ },
+ clear: function fontLoaderClear() {
+ var styleElement = this.styleElement;
+ if (styleElement) {
+ styleElement.parentNode.removeChild(styleElement);
+ styleElement = this.styleElement = null;
+ }
+ }
+ };
+ FontLoader.prototype.bind = function fontLoaderBind(fonts, callback) {
+ for (var i = 0, ii = fonts.length; i < ii; i++) {
+ var font = fonts[i];
+ if (font.attached) {
+ continue;
+ }
+ font.attached = true;
+ var rule = font.createFontFaceRule();
+ if (rule) {
+ this.insertRule(rule);
+ }
+ }
+ setTimeout(callback);
+ };
+ var IsEvalSupportedCached = {
+ get value() {
+ return shadow(this, 'value', sharedUtil.isEvalSupported());
+ }
+ };
+ var FontFaceObject = function FontFaceObjectClosure() {
+ function FontFaceObject(translatedData, options) {
+ this.compiledGlyphs = Object.create(null);
+ // importing translated data
+ for (var i in translatedData) {
+ this[i] = translatedData[i];
+ }
+ this.options = options;
+ }
+ FontFaceObject.prototype = {
+ createNativeFontFace: function FontFaceObject_createNativeFontFace() {
+ throw new Error('Not implemented: createNativeFontFace');
+ },
+ createFontFaceRule: function FontFaceObject_createFontFaceRule() {
+ if (!this.data) {
+ return null;
+ }
+ if (this.options.disableFontFace) {
+ this.disableFontFace = true;
+ return null;
+ }
+ var data = bytesToString(new Uint8Array(this.data));
+ var fontName = this.loadedName;
+ // Add the font-face rule to the document
+ var url = 'url(data:' + this.mimetype + ';base64,' + btoa(data) + ');';
+ var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}';
+ if (this.options.fontRegistry) {
+ this.options.fontRegistry.registerFont(this, url);
+ }
+ return rule;
+ },
+ getPathGenerator: function FontFaceObject_getPathGenerator(objs, character) {
+ if (!(character in this.compiledGlyphs)) {
+ var cmds = objs.get(this.loadedName + '_path_' + character);
+ var current, i, len;
+ // If we can, compile cmds into JS for MAXIMUM SPEED
+ if (this.options.isEvalSupported && IsEvalSupportedCached.value) {
+ var args, js = '';
+ for (i = 0, len = cmds.length; i < len; i++) {
+ current = cmds[i];
+ if (current.args !== undefined) {
+ args = current.args.join(',');
+ } else {
+ args = '';
+ }
+ js += 'c.' + current.cmd + '(' + args + ');\n';
+ }
+ this.compiledGlyphs[character] = new Function('c', 'size', js);
+ } else {
+ // But fall back on using Function.prototype.apply() if we're
+ // blocked from using eval() for whatever reason (like CSP policies)
+ this.compiledGlyphs[character] = function (c, size) {
+ for (i = 0, len = cmds.length; i < len; i++) {
+ current = cmds[i];
+ if (current.cmd === 'scale') {
+ current.args = [
+ size,
+ -size
+ ];
+ }
+ c[current.cmd].apply(c, current.args);
+ }
+ };
+ }
+ }
+ return this.compiledGlyphs[character];
+ }
+ };
+ return FontFaceObject;
+ }();
+ exports.FontFaceObject = FontFaceObject;
+ exports.FontLoader = FontLoader;
+ }));
+ (function (root, factory) {
+ factory(root.pdfjsDisplayMetadata = {}, root.pdfjsSharedUtil);
+ }(this, function (exports, sharedUtil) {
+ var error = sharedUtil.error;
+ 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 = Object.create(null);
+ 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';
+ }
+ };
+ exports.Metadata = Metadata;
+ }));
+ (function (root, factory) {
+ factory(root.pdfjsDisplaySVG = {}, root.pdfjsSharedUtil);
+ }(this, function (exports, sharedUtil) {
+ }));
+ (function (root, factory) {
+ factory(root.pdfjsDisplayAnnotationLayer = {}, root.pdfjsSharedUtil, root.pdfjsDisplayDOMUtils);
+ }(this, function (exports, sharedUtil, displayDOMUtils) {
+ var AnnotationBorderStyleType = sharedUtil.AnnotationBorderStyleType;
+ var AnnotationType = sharedUtil.AnnotationType;
+ var Util = sharedUtil.Util;
+ var addLinkAttributes = displayDOMUtils.addLinkAttributes;
+ var LinkTarget = displayDOMUtils.LinkTarget;
+ var getFilenameFromUrl = displayDOMUtils.getFilenameFromUrl;
+ var warn = sharedUtil.warn;
+ var CustomStyle = displayDOMUtils.CustomStyle;
+ var getDefaultSetting = displayDOMUtils.getDefaultSetting;
+ /**
+ * @typedef {Object} AnnotationElementParameters
+ * @property {Object} data
+ * @property {HTMLDivElement} layer
+ * @property {PDFPage} page
+ * @property {PageViewport} viewport
+ * @property {IPDFLinkService} linkService
+ * @property {DownloadManager} downloadManager
+ * @property {string} imageResourcesPath
+ * @property {boolean} renderInteractiveForms
+ */
+ /**
+ * @class
+ * @alias AnnotationElementFactory
+ */
+ function AnnotationElementFactory() {
+ }
+ AnnotationElementFactory.prototype = /** @lends AnnotationElementFactory.prototype */
+ {
+ /**
+ * @param {AnnotationElementParameters} parameters
+ * @returns {AnnotationElement}
+ */
+ create: function AnnotationElementFactory_create(parameters) {
+ var subtype = parameters.data.annotationType;
+ switch (subtype) {
+ case AnnotationType.LINK:
+ return new LinkAnnotationElement(parameters);
+ case AnnotationType.TEXT:
+ return new TextAnnotationElement(parameters);
+ case AnnotationType.WIDGET:
+ var fieldType = parameters.data.fieldType;
+ switch (fieldType) {
+ case 'Tx':
+ return new TextWidgetAnnotationElement(parameters);
+ case 'Ch':
+ return new ChoiceWidgetAnnotationElement(parameters);
+ }
+ return new WidgetAnnotationElement(parameters);
+ case AnnotationType.POPUP:
+ return new PopupAnnotationElement(parameters);
+ case AnnotationType.HIGHLIGHT:
+ return new HighlightAnnotationElement(parameters);
+ case AnnotationType.UNDERLINE:
+ return new UnderlineAnnotationElement(parameters);
+ case AnnotationType.SQUIGGLY:
+ return new SquigglyAnnotationElement(parameters);
+ case AnnotationType.STRIKEOUT:
+ return new StrikeOutAnnotationElement(parameters);
+ case AnnotationType.FILEATTACHMENT:
+ return new FileAttachmentAnnotationElement(parameters);
+ default:
+ return new AnnotationElement(parameters);
+ }
+ }
+ };
+ /**
+ * @class
+ * @alias AnnotationElement
+ */
+ var AnnotationElement = function AnnotationElementClosure() {
+ function AnnotationElement(parameters, isRenderable) {
+ this.isRenderable = isRenderable || false;
+ this.data = parameters.data;
+ this.layer = parameters.layer;
+ this.page = parameters.page;
+ this.viewport = parameters.viewport;
+ this.linkService = parameters.linkService;
+ this.downloadManager = parameters.downloadManager;
+ this.imageResourcesPath = parameters.imageResourcesPath;
+ this.renderInteractiveForms = parameters.renderInteractiveForms;
+ if (isRenderable) {
+ this.container = this._createContainer();
+ }
+ }
+ AnnotationElement.prototype = /** @lends AnnotationElement.prototype */
+ {
+ /**
+ * Create an empty container for the annotation's HTML element.
+ *
+ * @private
+ * @memberof AnnotationElement
+ * @returns {HTMLSectionElement}
+ */
+ _createContainer: function AnnotationElement_createContainer() {
+ var data = this.data, page = this.page, viewport = this.viewport;
+ var container = document.createElement('section');
+ var width = data.rect[2] - data.rect[0];
+ var height = data.rect[3] - data.rect[1];
+ container.setAttribute('data-annotation-id', data.id);
+ // Do *not* modify `data.rect`, since that will corrupt the annotation
+ // position on subsequent calls to `_createContainer` (see issue 6804).
+ var rect = Util.normalizeRect([
+ data.rect[0],
+ page.view[3] - data.rect[1] + page.view[1],
+ data.rect[2],
+ page.view[3] - data.rect[3] + page.view[1]
+ ]);
+ CustomStyle.setProp('transform', container, 'matrix(' + viewport.transform.join(',') + ')');
+ CustomStyle.setProp('transformOrigin', container, -rect[0] + 'px ' + -rect[1] + 'px');
+ if (data.borderStyle.width > 0) {
+ container.style.borderWidth = data.borderStyle.width + 'px';
+ if (data.borderStyle.style !== AnnotationBorderStyleType.UNDERLINE) {
+ // Underline styles only have a bottom border, so we do not need
+ // to adjust for all borders. This yields a similar result as
+ // Adobe Acrobat/Reader.
+ width = width - 2 * data.borderStyle.width;
+ height = height - 2 * data.borderStyle.width;
+ }
+ var horizontalRadius = data.borderStyle.horizontalCornerRadius;
+ var verticalRadius = data.borderStyle.verticalCornerRadius;
+ if (horizontalRadius > 0 || verticalRadius > 0) {
+ var radius = horizontalRadius + 'px / ' + verticalRadius + 'px';
+ CustomStyle.setProp('borderRadius', container, radius);
+ }
+ switch (data.borderStyle.style) {
+ case AnnotationBorderStyleType.SOLID:
+ container.style.borderStyle = 'solid';
+ break;
+ case AnnotationBorderStyleType.DASHED:
+ container.style.borderStyle = 'dashed';
+ break;
+ case AnnotationBorderStyleType.BEVELED:
+ warn('Unimplemented border style: beveled');
+ break;
+ case AnnotationBorderStyleType.INSET:
+ warn('Unimplemented border style: inset');
+ break;
+ case AnnotationBorderStyleType.UNDERLINE:
+ container.style.borderBottomStyle = 'solid';
+ break;
+ default:
+ break;
+ }
+ if (data.color) {
+ container.style.borderColor = Util.makeCssRgb(data.color[0] | 0, data.color[1] | 0, data.color[2] | 0);
+ } else {
+ // Transparent (invisible) border, so do not draw it at all.
+ container.style.borderWidth = 0;
+ }
+ }
+ container.style.left = rect[0] + 'px';
+ container.style.top = rect[1] + 'px';
+ container.style.width = width + 'px';
+ container.style.height = height + 'px';
+ return container;
+ },
+ /**
+ * Create a popup for the annotation's HTML element. This is used for
+ * annotations that do not have a Popup entry in the dictionary, but
+ * are of a type that works with popups (such as Highlight annotations).
+ *
+ * @private
+ * @param {HTMLSectionElement} container
+ * @param {HTMLDivElement|HTMLImageElement|null} trigger
+ * @param {Object} data
+ * @memberof AnnotationElement
+ */
+ _createPopup: function AnnotationElement_createPopup(container, trigger, data) {
+ // If no trigger element is specified, create it.
+ if (!trigger) {
+ trigger = document.createElement('div');
+ trigger.style.height = container.style.height;
+ trigger.style.width = container.style.width;
+ container.appendChild(trigger);
+ }
+ var popupElement = new PopupElement({
+ container: container,
+ trigger: trigger,
+ color: data.color,
+ title: data.title,
+ contents: data.contents,
+ hideWrapper: true
+ });
+ var popup = popupElement.render();
+ // Position the popup next to the annotation's container.
+ popup.style.left = container.style.width;
+ container.appendChild(popup);
+ },
+ /**
+ * Render the annotation's HTML element in the empty container.
+ *
+ * @public
+ * @memberof AnnotationElement
+ */
+ render: function AnnotationElement_render() {
+ throw new Error('Abstract method AnnotationElement.render called');
+ }
+ };
+ return AnnotationElement;
+ }();
+ /**
+ * @class
+ * @alias LinkAnnotationElement
+ */
+ var LinkAnnotationElement = function LinkAnnotationElementClosure() {
+ function LinkAnnotationElement(parameters) {
+ AnnotationElement.call(this, parameters, true);
+ }
+ Util.inherit(LinkAnnotationElement, AnnotationElement, {
+ /**
+ * Render the link annotation's HTML element in the empty container.
+ *
+ * @public
+ * @memberof LinkAnnotationElement
+ * @returns {HTMLSectionElement}
+ */
+ render: function LinkAnnotationElement_render() {
+ this.container.className = 'linkAnnotation';
+ var link = document.createElement('a');
+ addLinkAttributes(link, {
+ url: this.data.url,
+ target: this.data.newWindow ? LinkTarget.BLANK : undefined
+ });
+ if (!this.data.url) {
+ if (this.data.action) {
+ this._bindNamedAction(link, this.data.action);
+ } else {
+ this._bindLink(link, this.data.dest);
+ }
+ }
+ this.container.appendChild(link);
+ return this.container;
+ },
+ /**
+ * Bind internal links to the link element.
+ *
+ * @private
+ * @param {Object} link
+ * @param {Object} destination
+ * @memberof LinkAnnotationElement
+ */
+ _bindLink: function LinkAnnotationElement_bindLink(link, destination) {
+ var self = this;
+ link.href = this.linkService.getDestinationHash(destination);
+ link.onclick = function () {
+ if (destination) {
+ self.linkService.navigateTo(destination);
+ }
+ return false;
+ };
+ if (destination) {
+ link.className = 'internalLink';
+ }
+ },
+ /**
+ * Bind named actions to the link element.
+ *
+ * @private
+ * @param {Object} link
+ * @param {Object} action
+ * @memberof LinkAnnotationElement
+ */
+ _bindNamedAction: function LinkAnnotationElement_bindNamedAction(link, action) {
+ var self = this;
+ link.href = this.linkService.getAnchorUrl('');
+ link.onclick = function () {
+ self.linkService.executeNamedAction(action);
+ return false;
+ };
+ link.className = 'internalLink';
+ }
+ });
+ return LinkAnnotationElement;
+ }();
+ /**
+ * @class
+ * @alias TextAnnotationElement
+ */
+ var TextAnnotationElement = function TextAnnotationElementClosure() {
+ function TextAnnotationElement(parameters) {
+ var isRenderable = !!(parameters.data.hasPopup || parameters.data.title || parameters.data.contents);
+ AnnotationElement.call(this, parameters, isRenderable);
+ }
+ Util.inherit(TextAnnotationElement, AnnotationElement, {
+ /**
+ * Render the text annotation's HTML element in the empty container.
+ *
+ * @public
+ * @memberof TextAnnotationElement
+ * @returns {HTMLSectionElement}
+ */
+ render: function TextAnnotationElement_render() {
+ this.container.className = 'textAnnotation';
+ var image = document.createElement('img');
+ image.style.height = this.container.style.height;
+ image.style.width = this.container.style.width;
+ image.src = this.imageResourcesPath + 'annotation-' + this.data.name.toLowerCase() + '.svg';
+ image.alt = '[{{type}} Annotation]';
+ image.dataset.l10nId = 'text_annotation_type';
+ image.dataset.l10nArgs = JSON.stringify({ type: this.data.name });
+ if (!this.data.hasPopup) {
+ this._createPopup(this.container, image, this.data);
+ }
+ this.container.appendChild(image);
+ return this.container;
+ }
+ });
+ return TextAnnotationElement;
+ }();
+ /**
+ * @class
+ * @alias WidgetAnnotationElement
+ */
+ var WidgetAnnotationElement = function WidgetAnnotationElementClosure() {
+ function WidgetAnnotationElement(parameters, isRenderable) {
+ AnnotationElement.call(this, parameters, isRenderable);
+ }
+ Util.inherit(WidgetAnnotationElement, AnnotationElement, {
+ /**
+ * Render the widget annotation's HTML element in the empty container.
+ *
+ * @public
+ * @memberof WidgetAnnotationElement
+ * @returns {HTMLSectionElement}
+ */
+ render: function WidgetAnnotationElement_render() {
+ // Show only the container for unsupported field types.
+ return this.container;
+ }
+ });
+ return WidgetAnnotationElement;
+ }();
+ /**
+ * @class
+ * @alias TextWidgetAnnotationElement
+ */
+ var TextWidgetAnnotationElement = function TextWidgetAnnotationElementClosure() {
+ var TEXT_ALIGNMENT = [
+ 'left',
+ 'center',
+ 'right'
+ ];
+ function TextWidgetAnnotationElement(parameters) {
+ var isRenderable = parameters.renderInteractiveForms || !parameters.data.hasAppearance && !!parameters.data.fieldValue;
+ WidgetAnnotationElement.call(this, parameters, isRenderable);
+ }
+ Util.inherit(TextWidgetAnnotationElement, WidgetAnnotationElement, {
+ /**
+ * Render the text widget annotation's HTML element in the empty container.
+ *
+ * @public
+ * @memberof TextWidgetAnnotationElement
+ * @returns {HTMLSectionElement}
+ */
+ render: function TextWidgetAnnotationElement_render() {
+ this.container.className = 'textWidgetAnnotation';
+ var element = null;
+ if (this.renderInteractiveForms) {
+ // NOTE: We cannot set the values using `element.value` below, since it
+ // prevents the AnnotationLayer rasterizer in `test/driver.js`
+ // from parsing the elements correctly for the reference tests.
+ if (this.data.multiLine) {
+ element = document.createElement('textarea');
+ element.textContent = this.data.fieldValue;
+ } else {
+ element = document.createElement('input');
+ element.type = 'text';
+ element.setAttribute('value', this.data.fieldValue);
+ }
+ element.disabled = this.data.readOnly;
+ if (this.data.maxLen !== null) {
+ element.maxLength = this.data.maxLen;
+ }
+ if (this.data.comb) {
+ var fieldWidth = this.data.rect[2] - this.data.rect[0];
+ var combWidth = fieldWidth / this.data.maxLen;
+ element.classList.add('comb');
+ element.style.letterSpacing = 'calc(' + combWidth + 'px - 1ch)';
+ }
+ } else {
+ element = document.createElement('div');
+ element.textContent = this.data.fieldValue;
+ element.style.verticalAlign = 'middle';
+ element.style.display = 'table-cell';
+ var font = null;
+ if (this.data.fontRefName) {
+ font = this.page.commonObjs.getData(this.data.fontRefName);
+ }
+ this._setTextStyle(element, font);
+ }
+ if (this.data.textAlignment !== null) {
+ element.style.textAlign = TEXT_ALIGNMENT[this.data.textAlignment];
+ }
+ this.container.appendChild(element);
+ return this.container;
+ },
+ /**
+ * Apply text styles to the text in the element.
+ *
+ * @private
+ * @param {HTMLDivElement} element
+ * @param {Object} font
+ * @memberof TextWidgetAnnotationElement
+ */
+ _setTextStyle: function TextWidgetAnnotationElement_setTextStyle(element, font) {
+ // TODO: This duplicates some of the logic in CanvasGraphics.setFont().
+ var style = element.style;
+ style.fontSize = this.data.fontSize + 'px';
+ style.direction = this.data.fontDirection < 0 ? 'rtl' : 'ltr';
+ if (!font) {
+ return;
+ }
+ style.fontWeight = font.black ? font.bold ? '900' : 'bold' : font.bold ? 'bold' : 'normal';
+ style.fontStyle = font.italic ? 'italic' : 'normal';
+ // Use a reasonable default font if the font doesn't specify a fallback.
+ var fontFamily = font.loadedName ? '"' + font.loadedName + '", ' : '';
+ var fallbackName = font.fallbackName || 'Helvetica, sans-serif';
+ style.fontFamily = fontFamily + fallbackName;
+ }
+ });
+ return TextWidgetAnnotationElement;
+ }();
+ /**
+ * @class
+ * @alias ChoiceWidgetAnnotationElement
+ */
+ var ChoiceWidgetAnnotationElement = function ChoiceWidgetAnnotationElementClosure() {
+ function ChoiceWidgetAnnotationElement(parameters) {
+ WidgetAnnotationElement.call(this, parameters, parameters.renderInteractiveForms);
+ }
+ Util.inherit(ChoiceWidgetAnnotationElement, WidgetAnnotationElement, {
+ /**
+ * Render the choice widget annotation's HTML element in the empty
+ * container.
+ *
+ * @public
+ * @memberof ChoiceWidgetAnnotationElement
+ * @returns {HTMLSectionElement}
+ */
+ render: function ChoiceWidgetAnnotationElement_render() {
+ this.container.className = 'choiceWidgetAnnotation';
+ var selectElement = document.createElement('select');
+ selectElement.disabled = this.data.readOnly;
+ if (!this.data.combo) {
+ // List boxes have a size and (optionally) multiple selection.
+ selectElement.size = this.data.options.length;
+ if (this.data.multiSelect) {
+ selectElement.multiple = true;
+ }
+ }
+ // Insert the options into the choice field.
+ for (var i = 0, ii = this.data.options.length; i < ii; i++) {
+ var option = this.data.options[i];
+ var optionElement = document.createElement('option');
+ optionElement.textContent = option.displayValue;
+ optionElement.value = option.exportValue;
+ if (this.data.fieldValue.indexOf(option.displayValue) >= 0) {
+ optionElement.setAttribute('selected', true);
+ }
+ selectElement.appendChild(optionElement);
+ }
+ this.container.appendChild(selectElement);
+ return this.container;
+ }
+ });
+ return ChoiceWidgetAnnotationElement;
+ }();
+ /**
+ * @class
+ * @alias PopupAnnotationElement
+ */
+ var PopupAnnotationElement = function PopupAnnotationElementClosure() {
+ function PopupAnnotationElement(parameters) {
+ var isRenderable = !!(parameters.data.title || parameters.data.contents);
+ AnnotationElement.call(this, parameters, isRenderable);
+ }
+ Util.inherit(PopupAnnotationElement, AnnotationElement, {
+ /**
+ * Render the popup annotation's HTML element in the empty container.
+ *
+ * @public
+ * @memberof PopupAnnotationElement
+ * @returns {HTMLSectionElement}
+ */
+ render: function PopupAnnotationElement_render() {
+ this.container.className = 'popupAnnotation';
+ var selector = '[data-annotation-id="' + this.data.parentId + '"]';
+ var parentElement = this.layer.querySelector(selector);
+ if (!parentElement) {
+ return this.container;
+ }
+ var popup = new PopupElement({
+ container: this.container,
+ trigger: parentElement,
+ color: this.data.color,
+ title: this.data.title,
+ contents: this.data.contents
+ });
+ // Position the popup next to the parent annotation's container.
+ // PDF viewers ignore a popup annotation's rectangle.
+ var parentLeft = parseFloat(parentElement.style.left);
+ var parentWidth = parseFloat(parentElement.style.width);
+ CustomStyle.setProp('transformOrigin', this.container, -(parentLeft + parentWidth) + 'px -' + parentElement.style.top);
+ this.container.style.left = parentLeft + parentWidth + 'px';
+ this.container.appendChild(popup.render());
+ return this.container;
+ }
+ });
+ return PopupAnnotationElement;
+ }();
+ /**
+ * @class
+ * @alias PopupElement
+ */
+ var PopupElement = function PopupElementClosure() {
+ var BACKGROUND_ENLIGHT = 0.7;
+ function PopupElement(parameters) {
+ this.container = parameters.container;
+ this.trigger = parameters.trigger;
+ this.color = parameters.color;
+ this.title = parameters.title;
+ this.contents = parameters.contents;
+ this.hideWrapper = parameters.hideWrapper || false;
+ this.pinned = false;
+ }
+ PopupElement.prototype = /** @lends PopupElement.prototype */
+ {
+ /**
+ * Render the popup's HTML element.
+ *
+ * @public
+ * @memberof PopupElement
+ * @returns {HTMLSectionElement}
+ */
+ render: function PopupElement_render() {
+ var wrapper = document.createElement('div');
+ wrapper.className = 'popupWrapper';
+ // For Popup annotations we hide the entire section because it contains
+ // only the popup. However, for Text annotations without a separate Popup
+ // annotation, we cannot hide the entire container as the image would
+ // disappear too. In that special case, hiding the wrapper suffices.
+ this.hideElement = this.hideWrapper ? wrapper : this.container;
+ this.hideElement.setAttribute('hidden', true);
+ var popup = document.createElement('div');
+ popup.className = 'popup';
+ var color = this.color;
+ if (color) {
+ // Enlighten the color.
+ var r = BACKGROUND_ENLIGHT * (255 - color[0]) + color[0];
+ var g = BACKGROUND_ENLIGHT * (255 - color[1]) + color[1];
+ var b = BACKGROUND_ENLIGHT * (255 - color[2]) + color[2];
+ popup.style.backgroundColor = Util.makeCssRgb(r | 0, g | 0, b | 0);
+ }
+ var contents = this._formatContents(this.contents);
+ var title = document.createElement('h1');
+ title.textContent = this.title;
+ // Attach the event listeners to the trigger element.
+ this.trigger.addEventListener('click', this._toggle.bind(this));
+ this.trigger.addEventListener('mouseover', this._show.bind(this, false));
+ this.trigger.addEventListener('mouseout', this._hide.bind(this, false));
+ popup.addEventListener('click', this._hide.bind(this, true));
+ popup.appendChild(title);
+ popup.appendChild(contents);
+ wrapper.appendChild(popup);
+ return wrapper;
+ },
+ /**
+ * Format the contents of the popup by adding newlines where necessary.
+ *
+ * @private
+ * @param {string} contents
+ * @memberof PopupElement
+ * @returns {HTMLParagraphElement}
+ */
+ _formatContents: function PopupElement_formatContents(contents) {
+ var p = document.createElement('p');
+ var lines = contents.split(/(?:\r\n?|\n)/);
+ for (var i = 0, ii = lines.length; i < ii; ++i) {
+ var line = lines[i];
+ p.appendChild(document.createTextNode(line));
+ if (i < ii - 1) {
+ p.appendChild(document.createElement('br'));
+ }
+ }
+ return p;
+ },
+ /**
+ * Toggle the visibility of the popup.
+ *
+ * @private
+ * @memberof PopupElement
+ */
+ _toggle: function PopupElement_toggle() {
+ if (this.pinned) {
+ this._hide(true);
+ } else {
+ this._show(true);
+ }
+ },
+ /**
+ * Show the popup.
+ *
+ * @private
+ * @param {boolean} pin
+ * @memberof PopupElement
+ */
+ _show: function PopupElement_show(pin) {
+ if (pin) {
+ this.pinned = true;
+ }
+ if (this.hideElement.hasAttribute('hidden')) {
+ this.hideElement.removeAttribute('hidden');
+ this.container.style.zIndex += 1;
+ }
+ },
+ /**
+ * Hide the popup.
+ *
+ * @private
+ * @param {boolean} unpin
+ * @memberof PopupElement
+ */
+ _hide: function PopupElement_hide(unpin) {
+ if (unpin) {
+ this.pinned = false;
+ }
+ if (!this.hideElement.hasAttribute('hidden') && !this.pinned) {
+ this.hideElement.setAttribute('hidden', true);
+ this.container.style.zIndex -= 1;
+ }
+ }
+ };
+ return PopupElement;
+ }();
+ /**
+ * @class
+ * @alias HighlightAnnotationElement
+ */
+ var HighlightAnnotationElement = function HighlightAnnotationElementClosure() {
+ function HighlightAnnotationElement(parameters) {
+ var isRenderable = !!(parameters.data.hasPopup || parameters.data.title || parameters.data.contents);
+ AnnotationElement.call(this, parameters, isRenderable);
+ }
+ Util.inherit(HighlightAnnotationElement, AnnotationElement, {
+ /**
+ * Render the highlight annotation's HTML element in the empty container.
+ *
+ * @public
+ * @memberof HighlightAnnotationElement
+ * @returns {HTMLSectionElement}
+ */
+ render: function HighlightAnnotationElement_render() {
+ this.container.className = 'highlightAnnotation';
+ if (!this.data.hasPopup) {
+ this._createPopup(this.container, null, this.data);
+ }
+ return this.container;
+ }
+ });
+ return HighlightAnnotationElement;
+ }();
+ /**
+ * @class
+ * @alias UnderlineAnnotationElement
+ */
+ var UnderlineAnnotationElement = function UnderlineAnnotationElementClosure() {
+ function UnderlineAnnotationElement(parameters) {
+ var isRenderable = !!(parameters.data.hasPopup || parameters.data.title || parameters.data.contents);
+ AnnotationElement.call(this, parameters, isRenderable);
+ }
+ Util.inherit(UnderlineAnnotationElement, AnnotationElement, {
+ /**
+ * Render the underline annotation's HTML element in the empty container.
+ *
+ * @public
+ * @memberof UnderlineAnnotationElement
+ * @returns {HTMLSectionElement}
+ */
+ render: function UnderlineAnnotationElement_render() {
+ this.container.className = 'underlineAnnotation';
+ if (!this.data.hasPopup) {
+ this._createPopup(this.container, null, this.data);
+ }
+ return this.container;
+ }
+ });
+ return UnderlineAnnotationElement;
+ }();
+ /**
+ * @class
+ * @alias SquigglyAnnotationElement
+ */
+ var SquigglyAnnotationElement = function SquigglyAnnotationElementClosure() {
+ function SquigglyAnnotationElement(parameters) {
+ var isRenderable = !!(parameters.data.hasPopup || parameters.data.title || parameters.data.contents);
+ AnnotationElement.call(this, parameters, isRenderable);
+ }
+ Util.inherit(SquigglyAnnotationElement, AnnotationElement, {
+ /**
+ * Render the squiggly annotation's HTML element in the empty container.
+ *
+ * @public
+ * @memberof SquigglyAnnotationElement
+ * @returns {HTMLSectionElement}
+ */
+ render: function SquigglyAnnotationElement_render() {
+ this.container.className = 'squigglyAnnotation';
+ if (!this.data.hasPopup) {
+ this._createPopup(this.container, null, this.data);
+ }
+ return this.container;
+ }
+ });
+ return SquigglyAnnotationElement;
+ }();
+ /**
+ * @class
+ * @alias StrikeOutAnnotationElement
+ */
+ var StrikeOutAnnotationElement = function StrikeOutAnnotationElementClosure() {
+ function StrikeOutAnnotationElement(parameters) {
+ var isRenderable = !!(parameters.data.hasPopup || parameters.data.title || parameters.data.contents);
+ AnnotationElement.call(this, parameters, isRenderable);
+ }
+ Util.inherit(StrikeOutAnnotationElement, AnnotationElement, {
+ /**
+ * Render the strikeout annotation's HTML element in the empty container.
+ *
+ * @public
+ * @memberof StrikeOutAnnotationElement
+ * @returns {HTMLSectionElement}
+ */
+ render: function StrikeOutAnnotationElement_render() {
+ this.container.className = 'strikeoutAnnotation';
+ if (!this.data.hasPopup) {
+ this._createPopup(this.container, null, this.data);
+ }
+ return this.container;
+ }
+ });
+ return StrikeOutAnnotationElement;
+ }();
+ /**
+ * @class
+ * @alias FileAttachmentAnnotationElement
+ */
+ var FileAttachmentAnnotationElement = function FileAttachmentAnnotationElementClosure() {
+ function FileAttachmentAnnotationElement(parameters) {
+ AnnotationElement.call(this, parameters, true);
+ this.filename = getFilenameFromUrl(parameters.data.file.filename);
+ this.content = parameters.data.file.content;
+ }
+ Util.inherit(FileAttachmentAnnotationElement, AnnotationElement, {
+ /**
+ * Render the file attachment annotation's HTML element in the empty
+ * container.
+ *
+ * @public
+ * @memberof FileAttachmentAnnotationElement
+ * @returns {HTMLSectionElement}
+ */
+ render: function FileAttachmentAnnotationElement_render() {
+ this.container.className = 'fileAttachmentAnnotation';
+ var trigger = document.createElement('div');
+ trigger.style.height = this.container.style.height;
+ trigger.style.width = this.container.style.width;
+ trigger.addEventListener('dblclick', this._download.bind(this));
+ if (!this.data.hasPopup && (this.data.title || this.data.contents)) {
+ this._createPopup(this.container, trigger, this.data);
+ }
+ this.container.appendChild(trigger);
+ return this.container;
+ },
+ /**
+ * Download the file attachment associated with this annotation.
+ *
+ * @private
+ * @memberof FileAttachmentAnnotationElement
+ */
+ _download: function FileAttachmentAnnotationElement_download() {
+ if (!this.downloadManager) {
+ warn('Download cannot be started due to unavailable download manager');
+ return;
+ }
+ this.downloadManager.downloadData(this.content, this.filename, '');
+ }
+ });
+ return FileAttachmentAnnotationElement;
+ }();
+ /**
+ * @typedef {Object} AnnotationLayerParameters
+ * @property {PageViewport} viewport
+ * @property {HTMLDivElement} div
+ * @property {Array} annotations
+ * @property {PDFPage} page
+ * @property {IPDFLinkService} linkService
+ * @property {string} imageResourcesPath
+ * @property {boolean} renderInteractiveForms
+ */
+ /**
+ * @class
+ * @alias AnnotationLayer
+ */
+ var AnnotationLayer = function AnnotationLayerClosure() {
+ return {
+ /**
+ * Render a new annotation layer with all annotation elements.
+ *
+ * @public
+ * @param {AnnotationLayerParameters} parameters
+ * @memberof AnnotationLayer
+ */
+ render: function AnnotationLayer_render(parameters) {
+ var annotationElementFactory = new AnnotationElementFactory();
+ for (var i = 0, ii = parameters.annotations.length; i < ii; i++) {
+ var data = parameters.annotations[i];
+ if (!data) {
+ continue;
+ }
+ var properties = {
+ data: data,
+ layer: parameters.div,
+ page: parameters.page,
+ viewport: parameters.viewport,
+ linkService: parameters.linkService,
+ downloadManager: parameters.downloadManager,
+ imageResourcesPath: parameters.imageResourcesPath || getDefaultSetting('imageResourcesPath'),
+ renderInteractiveForms: parameters.renderInteractiveForms || false
+ };
+ var element = annotationElementFactory.create(properties);
+ if (element.isRenderable) {
+ parameters.div.appendChild(element.render());
+ }
+ }
+ },
+ /**
+ * Update the annotation elements on existing annotation layer.
+ *
+ * @public
+ * @param {AnnotationLayerParameters} parameters
+ * @memberof AnnotationLayer
+ */
+ update: function AnnotationLayer_update(parameters) {
+ for (var i = 0, ii = parameters.annotations.length; i < ii; i++) {
+ var data = parameters.annotations[i];
+ var element = parameters.div.querySelector('[data-annotation-id="' + data.id + '"]');
+ if (element) {
+ CustomStyle.setProp('transform', element, 'matrix(' + parameters.viewport.transform.join(',') + ')');
+ }
+ }
+ parameters.div.removeAttribute('hidden');
+ }
+ };
+ }();
+ exports.AnnotationLayer = AnnotationLayer;
+ }));
+ (function (root, factory) {
+ factory(root.pdfjsDisplayTextLayer = {}, root.pdfjsSharedUtil, root.pdfjsDisplayDOMUtils);
+ }(this, function (exports, sharedUtil, displayDOMUtils) {
+ var Util = sharedUtil.Util;
+ var createPromiseCapability = sharedUtil.createPromiseCapability;
+ var CustomStyle = displayDOMUtils.CustomStyle;
+ var getDefaultSetting = displayDOMUtils.getDefaultSetting;
+ /**
+ * Text layer render parameters.
+ *
+ * @typedef {Object} TextLayerRenderParameters
+ * @property {TextContent} textContent - Text content to render (the object is
+ * returned by the page's getTextContent() method).
+ * @property {HTMLElement} container - HTML element that will contain text runs.
+ * @property {PageViewport} viewport - The target viewport to properly
+ * layout the text runs.
+ * @property {Array} textDivs - (optional) HTML elements that are correspond
+ * the text items of the textContent input. This is output and shall be
+ * initially be set to empty array.
+ * @property {number} timeout - (optional) Delay in milliseconds before
+ * rendering of the text runs occurs.
+ * @property {boolean} enhanceTextSelection - (optional) Whether to turn on the
+ * text selection enhancement.
+ */
+ var renderTextLayer = function renderTextLayerClosure() {
+ var MAX_TEXT_DIVS_TO_RENDER = 100000;
+ var NonWhitespaceRegexp = /\S/;
+ function isAllWhitespace(str) {
+ return !NonWhitespaceRegexp.test(str);
+ }
+ // Text layers may contain many thousand div's, and using `styleBuf` avoids
+ // creating many intermediate strings when building their 'style' properties.
+ var styleBuf = [
+ 'left: ',
+ 0,
+ 'px; top: ',
+ 0,
+ 'px; font-size: ',
+ 0,
+ 'px; font-family: ',
+ '',
+ ';'
+ ];
+ function appendText(task, geom, styles) {
+ // Initialize all used properties to keep the caches monomorphic.
+ var textDiv = document.createElement('div');
+ var textDivProperties = {
+ style: null,
+ angle: 0,
+ canvasWidth: 0,
+ isWhitespace: false,
+ originalTransform: null,
+ paddingBottom: 0,
+ paddingLeft: 0,
+ paddingRight: 0,
+ paddingTop: 0,
+ scale: 1
+ };
+ task._textDivs.push(textDiv);
+ if (isAllWhitespace(geom.str)) {
+ textDivProperties.isWhitespace = true;
+ task._textDivProperties.set(textDiv, textDivProperties);
+ return;
+ }
+ var tx = Util.transform(task._viewport.transform, geom.transform);
+ var angle = Math.atan2(tx[1], tx[0]);
+ var style = styles[geom.fontName];
+ if (style.vertical) {
+ angle += Math.PI / 2;
+ }
+ var fontHeight = Math.sqrt(tx[2] * tx[2] + tx[3] * tx[3]);
+ var fontAscent = fontHeight;
+ if (style.ascent) {
+ fontAscent = style.ascent * fontAscent;
+ } else if (style.descent) {
+ fontAscent = (1 + style.descent) * fontAscent;
+ }
+ var left;
+ var top;
+ if (angle === 0) {
+ left = tx[4];
+ top = tx[5] - fontAscent;
+ } else {
+ left = tx[4] + fontAscent * Math.sin(angle);
+ top = tx[5] - fontAscent * Math.cos(angle);
+ }
+ styleBuf[1] = left;
+ styleBuf[3] = top;
+ styleBuf[5] = fontHeight;
+ styleBuf[7] = style.fontFamily;
+ textDivProperties.style = styleBuf.join('');
+ textDiv.setAttribute('style', textDivProperties.style);
+ textDiv.textContent = geom.str;
+ // |fontName| is only used by the Font Inspector. This test will succeed
+ // when e.g. the Font Inspector is off but the Stepper is on, but it's
+ // not worth the effort to do a more accurate test. We only use `dataset`
+ // here to make the font name available for the debugger.
+ if (getDefaultSetting('pdfBug')) {
+ textDiv.dataset.fontName = geom.fontName;
+ }
+ if (angle !== 0) {
+ textDivProperties.angle = angle * (180 / Math.PI);
+ }
+ // We don't bother scaling single-char text divs, because it has very
+ // little effect on text highlighting. This makes scrolling on docs with
+ // lots of such divs a lot faster.
+ if (geom.str.length > 1) {
+ if (style.vertical) {
+ textDivProperties.canvasWidth = geom.height * task._viewport.scale;
+ } else {
+ textDivProperties.canvasWidth = geom.width * task._viewport.scale;
+ }
+ }
+ task._textDivProperties.set(textDiv, textDivProperties);
+ if (task._enhanceTextSelection) {
+ var angleCos = 1, angleSin = 0;
+ if (angle !== 0) {
+ angleCos = Math.cos(angle);
+ angleSin = Math.sin(angle);
+ }
+ var divWidth = (style.vertical ? geom.height : geom.width) * task._viewport.scale;
+ var divHeight = fontHeight;
+ var m, b;
+ if (angle !== 0) {
+ m = [
+ angleCos,
+ angleSin,
+ -angleSin,
+ angleCos,
+ left,
+ top
+ ];
+ b = Util.getAxialAlignedBoundingBox([
+ 0,
+ 0,
+ divWidth,
+ divHeight
+ ], m);
+ } else {
+ b = [
+ left,
+ top,
+ left + divWidth,
+ top + divHeight
+ ];
+ }
+ task._bounds.push({
+ left: b[0],
+ top: b[1],
+ right: b[2],
+ bottom: b[3],
+ div: textDiv,
+ size: [
+ divWidth,
+ divHeight
+ ],
+ m: m
+ });
+ }
+ }
+ function render(task) {
+ if (task._canceled) {
+ return;
+ }
+ var textLayerFrag = task._container;
+ var textDivs = task._textDivs;
+ var capability = task._capability;
+ var textDivsLength = textDivs.length;
+ // No point in rendering many divs as it would make the browser
+ // unusable even after the divs are rendered.
+ if (textDivsLength > MAX_TEXT_DIVS_TO_RENDER) {
+ task._renderingDone = true;
+ capability.resolve();
+ return;
+ }
+ var canvas = document.createElement('canvas');
+ canvas.mozOpaque = true;
+ var ctx = canvas.getContext('2d', { alpha: false });
+ var lastFontSize;
+ var lastFontFamily;
+ for (var i = 0; i < textDivsLength; i++) {
+ var textDiv = textDivs[i];
+ var textDivProperties = task._textDivProperties.get(textDiv);
+ if (textDivProperties.isWhitespace) {
+ continue;
+ }
+ var fontSize = textDiv.style.fontSize;
+ var fontFamily = textDiv.style.fontFamily;
+ // Only build font string and set to context if different from last.
+ if (fontSize !== lastFontSize || fontFamily !== lastFontFamily) {
+ ctx.font = fontSize + ' ' + fontFamily;
+ lastFontSize = fontSize;
+ lastFontFamily = fontFamily;
+ }
+ var width = ctx.measureText(textDiv.textContent).width;
+ textLayerFrag.appendChild(textDiv);
+ var transform = '';
+ if (textDivProperties.canvasWidth !== 0 && width > 0) {
+ textDivProperties.scale = textDivProperties.canvasWidth / width;
+ transform = 'scaleX(' + textDivProperties.scale + ')';
+ }
+ if (textDivProperties.angle !== 0) {
+ transform = 'rotate(' + textDivProperties.angle + 'deg) ' + transform;
+ }
+ if (transform !== '') {
+ textDivProperties.originalTransform = transform;
+ CustomStyle.setProp('transform', textDiv, transform);
+ }
+ task._textDivProperties.set(textDiv, textDivProperties);
+ }
+ task._renderingDone = true;
+ capability.resolve();
+ }
+ function expand(task) {
+ var bounds = task._bounds;
+ var viewport = task._viewport;
+ var expanded = expandBounds(viewport.width, viewport.height, bounds);
+ for (var i = 0; i < expanded.length; i++) {
+ var div = bounds[i].div;
+ var divProperties = task._textDivProperties.get(div);
+ if (divProperties.angle === 0) {
+ divProperties.paddingLeft = bounds[i].left - expanded[i].left;
+ divProperties.paddingTop = bounds[i].top - expanded[i].top;
+ divProperties.paddingRight = expanded[i].right - bounds[i].right;
+ divProperties.paddingBottom = expanded[i].bottom - bounds[i].bottom;
+ task._textDivProperties.set(div, divProperties);
+ continue;
+ }
+ // Box is rotated -- trying to find padding so rotated div will not
+ // exceed its expanded bounds.
+ var e = expanded[i], b = bounds[i];
+ var m = b.m, c = m[0], s = m[1];
+ // Finding intersections with expanded box.
+ var points = [
+ [
+ 0,
+ 0
+ ],
+ [
+ 0,
+ b.size[1]
+ ],
+ [
+ b.size[0],
+ 0
+ ],
+ b.size
+ ];
+ var ts = new Float64Array(64);
+ points.forEach(function (p, i) {
+ var t = Util.applyTransform(p, m);
+ ts[i + 0] = c && (e.left - t[0]) / c;
+ ts[i + 4] = s && (e.top - t[1]) / s;
+ ts[i + 8] = c && (e.right - t[0]) / c;
+ ts[i + 12] = s && (e.bottom - t[1]) / s;
+ ts[i + 16] = s && (e.left - t[0]) / -s;
+ ts[i + 20] = c && (e.top - t[1]) / c;
+ ts[i + 24] = s && (e.right - t[0]) / -s;
+ ts[i + 28] = c && (e.bottom - t[1]) / c;
+ ts[i + 32] = c && (e.left - t[0]) / -c;
+ ts[i + 36] = s && (e.top - t[1]) / -s;
+ ts[i + 40] = c && (e.right - t[0]) / -c;
+ ts[i + 44] = s && (e.bottom - t[1]) / -s;
+ ts[i + 48] = s && (e.left - t[0]) / s;
+ ts[i + 52] = c && (e.top - t[1]) / -c;
+ ts[i + 56] = s && (e.right - t[0]) / s;
+ ts[i + 60] = c && (e.bottom - t[1]) / -c;
+ });
+ var findPositiveMin = function (ts, offset, count) {
+ var result = 0;
+ for (var i = 0; i < count; i++) {
+ var t = ts[offset++];
+ if (t > 0) {
+ result = result ? Math.min(t, result) : t;
+ }
+ }
+ return result;
+ };
+ // Not based on math, but to simplify calculations, using cos and sin
+ // absolute values to not exceed the box (it can but insignificantly).
+ var boxScale = 1 + Math.min(Math.abs(c), Math.abs(s));
+ divProperties.paddingLeft = findPositiveMin(ts, 32, 16) / boxScale;
+ divProperties.paddingTop = findPositiveMin(ts, 48, 16) / boxScale;
+ divProperties.paddingRight = findPositiveMin(ts, 0, 16) / boxScale;
+ divProperties.paddingBottom = findPositiveMin(ts, 16, 16) / boxScale;
+ task._textDivProperties.set(div, divProperties);
+ }
+ }
+ function expandBounds(width, height, boxes) {
+ var bounds = boxes.map(function (box, i) {
+ return {
+ x1: box.left,
+ y1: box.top,
+ x2: box.right,
+ y2: box.bottom,
+ index: i,
+ x1New: undefined,
+ x2New: undefined
+ };
+ });
+ expandBoundsLTR(width, bounds);
+ var expanded = new Array(boxes.length);
+ bounds.forEach(function (b) {
+ var i = b.index;
+ expanded[i] = {
+ left: b.x1New,
+ top: 0,
+ right: b.x2New,
+ bottom: 0
+ };
+ });
+ // Rotating on 90 degrees and extending extended boxes. Reusing the bounds
+ // array and objects.
+ boxes.map(function (box, i) {
+ var e = expanded[i], b = bounds[i];
+ b.x1 = box.top;
+ b.y1 = width - e.right;
+ b.x2 = box.bottom;
+ b.y2 = width - e.left;
+ b.index = i;
+ b.x1New = undefined;
+ b.x2New = undefined;
+ });
+ expandBoundsLTR(height, bounds);
+ bounds.forEach(function (b) {
+ var i = b.index;
+ expanded[i].top = b.x1New;
+ expanded[i].bottom = b.x2New;
+ });
+ return expanded;
+ }
+ function expandBoundsLTR(width, bounds) {
+ // Sorting by x1 coordinate and walk by the bounds in the same order.
+ bounds.sort(function (a, b) {
+ return a.x1 - b.x1 || a.index - b.index;
+ });
+ // First we see on the horizon is a fake boundary.
+ var fakeBoundary = {
+ x1: -Infinity,
+ y1: -Infinity,
+ x2: 0,
+ y2: Infinity,
+ index: -1,
+ x1New: 0,
+ x2New: 0
+ };
+ var horizon = [{
+ start: -Infinity,
+ end: Infinity,
+ boundary: fakeBoundary
+ }];
+ bounds.forEach(function (boundary) {
+ // Searching for the affected part of horizon.
+ // TODO red-black tree or simple binary search
+ var i = 0;
+ while (i < horizon.length && horizon[i].end <= boundary.y1) {
+ i++;
+ }
+ var j = horizon.length - 1;
+ while (j >= 0 && horizon[j].start >= boundary.y2) {
+ j--;
+ }
+ var horizonPart, affectedBoundary;
+ var q, k, maxXNew = -Infinity;
+ for (q = i; q <= j; q++) {
+ horizonPart = horizon[q];
+ affectedBoundary = horizonPart.boundary;
+ var xNew;
+ if (affectedBoundary.x2 > boundary.x1) {
+ // In the middle of the previous element, new x shall be at the
+ // boundary start. Extending if further if the affected bondary
+ // placed on top of the current one.
+ xNew = affectedBoundary.index > boundary.index ? affectedBoundary.x1New : boundary.x1;
+ } else if (affectedBoundary.x2New === undefined) {
+ // We have some space in between, new x in middle will be a fair
+ // choice.
+ xNew = (affectedBoundary.x2 + boundary.x1) / 2;
+ } else {
+ // Affected boundary has x2new set, using it as new x.
+ xNew = affectedBoundary.x2New;
+ }
+ if (xNew > maxXNew) {
+ maxXNew = xNew;
+ }
+ }
+ // Set new x1 for current boundary.
+ boundary.x1New = maxXNew;
+ // Adjusts new x2 for the affected boundaries.
+ for (q = i; q <= j; q++) {
+ horizonPart = horizon[q];
+ affectedBoundary = horizonPart.boundary;
+ if (affectedBoundary.x2New === undefined) {
+ // Was not set yet, choosing new x if possible.
+ if (affectedBoundary.x2 > boundary.x1) {
+ // Current and affected boundaries intersect. If affected boundary
+ // is placed on top of the current, shrinking the affected.
+ if (affectedBoundary.index > boundary.index) {
+ affectedBoundary.x2New = affectedBoundary.x2;
+ }
+ } else {
+ affectedBoundary.x2New = maxXNew;
+ }
+ } else if (affectedBoundary.x2New > maxXNew) {
+ // Affected boundary is touching new x, pushing it back.
+ affectedBoundary.x2New = Math.max(maxXNew, affectedBoundary.x2);
+ }
+ }
+ // Fixing the horizon.
+ var changedHorizon = [], lastBoundary = null;
+ for (q = i; q <= j; q++) {
+ horizonPart = horizon[q];
+ affectedBoundary = horizonPart.boundary;
+ // Checking which boundary will be visible.
+ var useBoundary = affectedBoundary.x2 > boundary.x2 ? affectedBoundary : boundary;
+ if (lastBoundary === useBoundary) {
+ // Merging with previous.
+ changedHorizon[changedHorizon.length - 1].end = horizonPart.end;
+ } else {
+ changedHorizon.push({
+ start: horizonPart.start,
+ end: horizonPart.end,
+ boundary: useBoundary
+ });
+ lastBoundary = useBoundary;
+ }
+ }
+ if (horizon[i].start < boundary.y1) {
+ changedHorizon[0].start = boundary.y1;
+ changedHorizon.unshift({
+ start: horizon[i].start,
+ end: boundary.y1,
+ boundary: horizon[i].boundary
+ });
+ }
+ if (boundary.y2 < horizon[j].end) {
+ changedHorizon[changedHorizon.length - 1].end = boundary.y2;
+ changedHorizon.push({
+ start: boundary.y2,
+ end: horizon[j].end,
+ boundary: horizon[j].boundary
+ });
+ }
+ // Set x2 new of boundary that is no longer visible (see overlapping case
+ // above).
+ // TODO more efficient, e.g. via reference counting.
+ for (q = i; q <= j; q++) {
+ horizonPart = horizon[q];
+ affectedBoundary = horizonPart.boundary;
+ if (affectedBoundary.x2New !== undefined) {
+ continue;
+ }
+ var used = false;
+ for (k = i - 1; !used && k >= 0 && horizon[k].start >= affectedBoundary.y1; k--) {
+ used = horizon[k].boundary === affectedBoundary;
+ }
+ for (k = j + 1; !used && k < horizon.length && horizon[k].end <= affectedBoundary.y2; k++) {
+ used = horizon[k].boundary === affectedBoundary;
+ }
+ for (k = 0; !used && k < changedHorizon.length; k++) {
+ used = changedHorizon[k].boundary === affectedBoundary;
+ }
+ if (!used) {
+ affectedBoundary.x2New = maxXNew;
+ }
+ }
+ Array.prototype.splice.apply(horizon, [
+ i,
+ j - i + 1
+ ].concat(changedHorizon));
+ });
+ // Set new x2 for all unset boundaries.
+ horizon.forEach(function (horizonPart) {
+ var affectedBoundary = horizonPart.boundary;
+ if (affectedBoundary.x2New === undefined) {
+ affectedBoundary.x2New = Math.max(width, affectedBoundary.x2);
+ }
+ });
+ }
+ /**
+ * Text layer rendering task.
+ *
+ * @param {TextContent} textContent
+ * @param {HTMLElement} container
+ * @param {PageViewport} viewport
+ * @param {Array} textDivs
+ * @param {boolean} enhanceTextSelection
+ * @private
+ */
+ function TextLayerRenderTask(textContent, container, viewport, textDivs, enhanceTextSelection) {
+ this._textContent = textContent;
+ this._container = container;
+ this._viewport = viewport;
+ this._textDivs = textDivs || [];
+ this._textDivProperties = new WeakMap();
+ this._renderingDone = false;
+ this._canceled = false;
+ this._capability = createPromiseCapability();
+ this._renderTimer = null;
+ this._bounds = [];
+ this._enhanceTextSelection = !!enhanceTextSelection;
+ }
+ TextLayerRenderTask.prototype = {
+ get promise() {
+ return this._capability.promise;
+ },
+ cancel: function TextLayer_cancel() {
+ this._canceled = true;
+ if (this._renderTimer !== null) {
+ clearTimeout(this._renderTimer);
+ this._renderTimer = null;
+ }
+ this._capability.reject('canceled');
+ },
+ _render: function TextLayer_render(timeout) {
+ var textItems = this._textContent.items;
+ var textStyles = this._textContent.styles;
+ for (var i = 0, len = textItems.length; i < len; i++) {
+ appendText(this, textItems[i], textStyles);
+ }
+ if (!timeout) {
+ // Render right away
+ render(this);
+ } else {
+ // Schedule
+ var self = this;
+ this._renderTimer = setTimeout(function () {
+ render(self);
+ self._renderTimer = null;
+ }, timeout);
+ }
+ },
+ expandTextDivs: function TextLayer_expandTextDivs(expandDivs) {
+ if (!this._enhanceTextSelection || !this._renderingDone) {
+ return;
+ }
+ if (this._bounds !== null) {
+ expand(this);
+ this._bounds = null;
+ }
+ for (var i = 0, ii = this._textDivs.length; i < ii; i++) {
+ var div = this._textDivs[i];
+ var divProperties = this._textDivProperties.get(div);
+ if (divProperties.isWhitespace) {
+ continue;
+ }
+ if (expandDivs) {
+ var transform = '', padding = '';
+ if (divProperties.scale !== 1) {
+ transform = 'scaleX(' + divProperties.scale + ')';
+ }
+ if (divProperties.angle !== 0) {
+ transform = 'rotate(' + divProperties.angle + 'deg) ' + transform;
+ }
+ if (divProperties.paddingLeft !== 0) {
+ padding += ' padding-left: ' + divProperties.paddingLeft / divProperties.scale + 'px;';
+ transform += ' translateX(' + -divProperties.paddingLeft / divProperties.scale + 'px)';
+ }
+ if (divProperties.paddingTop !== 0) {
+ padding += ' padding-top: ' + divProperties.paddingTop + 'px;';
+ transform += ' translateY(' + -divProperties.paddingTop + 'px)';
+ }
+ if (divProperties.paddingRight !== 0) {
+ padding += ' padding-right: ' + divProperties.paddingRight / divProperties.scale + 'px;';
+ }
+ if (divProperties.paddingBottom !== 0) {
+ padding += ' padding-bottom: ' + divProperties.paddingBottom + 'px;';
+ }
+ if (padding !== '') {
+ div.setAttribute('style', divProperties.style + padding);
+ }
+ if (transform !== '') {
+ CustomStyle.setProp('transform', div, transform);
+ }
+ } else {
+ div.style.padding = 0;
+ CustomStyle.setProp('transform', div, divProperties.originalTransform || '');
+ }
+ }
+ }
+ };
+ /**
+ * Starts rendering of the text layer.
+ *
+ * @param {TextLayerRenderParameters} renderParameters
+ * @returns {TextLayerRenderTask}
+ */
+ function renderTextLayer(renderParameters) {
+ var task = new TextLayerRenderTask(renderParameters.textContent, renderParameters.container, renderParameters.viewport, renderParameters.textDivs, renderParameters.enhanceTextSelection);
+ task._render(renderParameters.timeout);
+ return task;
+ }
+ return renderTextLayer;
+ }();
+ exports.renderTextLayer = renderTextLayer;
+ }));
+ (function (root, factory) {
+ factory(root.pdfjsDisplayWebGL = {}, root.pdfjsSharedUtil, root.pdfjsDisplayDOMUtils);
+ }(this, function (exports, sharedUtil, displayDOMUtils) {
+ var shadow = sharedUtil.shadow;
+ var getDefaultSetting = displayDOMUtils.getDefaultSetting;
+ var WebGLUtils = function WebGLUtilsClosure() {
+ function loadShader(gl, code, shaderType) {
+ var shader = gl.createShader(shaderType);
+ gl.shaderSource(shader, code);
+ gl.compileShader(shader);
+ var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
+ if (!compiled) {
+ var errorMsg = gl.getShaderInfoLog(shader);
+ throw new Error('Error during shader compilation: ' + errorMsg);
+ }
+ return shader;
+ }
+ function createVertexShader(gl, code) {
+ return loadShader(gl, code, gl.VERTEX_SHADER);
+ }
+ function createFragmentShader(gl, code) {
+ return loadShader(gl, code, gl.FRAGMENT_SHADER);
+ }
+ function createProgram(gl, shaders) {
+ var program = gl.createProgram();
+ for (var i = 0, ii = shaders.length; i < ii; ++i) {
+ gl.attachShader(program, shaders[i]);
+ }
+ gl.linkProgram(program);
+ var linked = gl.getProgramParameter(program, gl.LINK_STATUS);
+ if (!linked) {
+ var errorMsg = gl.getProgramInfoLog(program);
+ throw new Error('Error during program linking: ' + errorMsg);
+ }
+ return program;
+ }
+ function createTexture(gl, image, textureId) {
+ gl.activeTexture(textureId);
+ var texture = gl.createTexture();
+ gl.bindTexture(gl.TEXTURE_2D, texture);
+ // Set the parameters so we can render any size image.
+ gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+ gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+ gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+ gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+ // Upload the image into the texture.
+ gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);
+ return texture;
+ }
+ var currentGL, currentCanvas;
+ function generateGL() {
+ if (currentGL) {
+ return;
+ }
+ currentCanvas = document.createElement('canvas');
+ currentGL = currentCanvas.getContext('webgl', { premultipliedalpha: false });
+ }
+ var smaskVertexShaderCode = '\
+ attribute vec2 a_position; \
+ attribute vec2 a_texCoord; \
+ \
+ uniform vec2 u_resolution; \
+ \
+ varying vec2 v_texCoord; \
+ \
+ void main() { \
+ vec2 clipSpace = (a_position / u_resolution) * 2.0 - 1.0; \
+ gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \
+ \
+ v_texCoord = a_texCoord; \
+ } ';
+ var smaskFragmentShaderCode = '\
+ precision mediump float; \
+ \
+ uniform vec4 u_backdrop; \
+ uniform int u_subtype; \
+ uniform sampler2D u_image; \
+ uniform sampler2D u_mask; \
+ \
+ varying vec2 v_texCoord; \
+ \
+ void main() { \
+ vec4 imageColor = texture2D(u_image, v_texCoord); \
+ vec4 maskColor = texture2D(u_mask, v_texCoord); \
+ if (u_backdrop.a > 0.0) { \
+ maskColor.rgb = maskColor.rgb * maskColor.a + \
+ u_backdrop.rgb * (1.0 - maskColor.a); \
+ } \
+ float lum; \
+ if (u_subtype == 0) { \
+ lum = maskColor.a; \
+ } else { \
+ lum = maskColor.r * 0.3 + maskColor.g * 0.59 + \
+ maskColor.b * 0.11; \
+ } \
+ imageColor.a *= lum; \
+ imageColor.rgb *= imageColor.a; \
+ gl_FragColor = imageColor; \
+ } ';
+ var smaskCache = null;
+ function initSmaskGL() {
+ var canvas, gl;
+ generateGL();
+ canvas = currentCanvas;
+ currentCanvas = null;
+ gl = currentGL;
+ currentGL = null;
+ // setup a GLSL program
+ var vertexShader = createVertexShader(gl, smaskVertexShaderCode);
+ var fragmentShader = createFragmentShader(gl, smaskFragmentShaderCode);
+ var program = createProgram(gl, [
+ vertexShader,
+ fragmentShader
+ ]);
+ gl.useProgram(program);
+ var cache = {};
+ cache.gl = gl;
+ cache.canvas = canvas;
+ cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution');
+ cache.positionLocation = gl.getAttribLocation(program, 'a_position');
+ cache.backdropLocation = gl.getUniformLocation(program, 'u_backdrop');
+ cache.subtypeLocation = gl.getUniformLocation(program, 'u_subtype');
+ var texCoordLocation = gl.getAttribLocation(program, 'a_texCoord');
+ var texLayerLocation = gl.getUniformLocation(program, 'u_image');
+ var texMaskLocation = gl.getUniformLocation(program, 'u_mask');
+ // provide texture coordinates for the rectangle.
+ var texCoordBuffer = gl.createBuffer();
+ gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
+ gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
+ 0.0,
+ 0.0,
+ 1.0,
+ 0.0,
+ 0.0,
+ 1.0,
+ 0.0,
+ 1.0,
+ 1.0,
+ 0.0,
+ 1.0,
+ 1.0
+ ]), gl.STATIC_DRAW);
+ gl.enableVertexAttribArray(texCoordLocation);
+ gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0);
+ gl.uniform1i(texLayerLocation, 0);
+ gl.uniform1i(texMaskLocation, 1);
+ smaskCache = cache;
+ }
+ function composeSMask(layer, mask, properties) {
+ var width = layer.width, height = layer.height;
+ if (!smaskCache) {
+ initSmaskGL();
+ }
+ var cache = smaskCache, canvas = cache.canvas, gl = cache.gl;
+ canvas.width = width;
+ canvas.height = height;
+ gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
+ gl.uniform2f(cache.resolutionLocation, width, height);
+ if (properties.backdrop) {
+ gl.uniform4f(cache.resolutionLocation, properties.backdrop[0], properties.backdrop[1], properties.backdrop[2], 1);
+ } else {
+ gl.uniform4f(cache.resolutionLocation, 0, 0, 0, 0);
+ }
+ gl.uniform1i(cache.subtypeLocation, properties.subtype === 'Luminosity' ? 1 : 0);
+ // Create a textures
+ var texture = createTexture(gl, layer, gl.TEXTURE0);
+ var maskTexture = createTexture(gl, mask, gl.TEXTURE1);
+ // Create a buffer and put a single clipspace rectangle in
+ // it (2 triangles)
+ var buffer = gl.createBuffer();
+ gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
+ gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
+ 0,
+ 0,
+ width,
+ 0,
+ 0,
+ height,
+ 0,
+ height,
+ width,
+ 0,
+ width,
+ height
+ ]), gl.STATIC_DRAW);
+ gl.enableVertexAttribArray(cache.positionLocation);
+ gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);
+ // draw
+ gl.clearColor(0, 0, 0, 0);
+ gl.enable(gl.BLEND);
+ gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA);
+ gl.clear(gl.COLOR_BUFFER_BIT);
+ gl.drawArrays(gl.TRIANGLES, 0, 6);
+ gl.flush();
+ gl.deleteTexture(texture);
+ gl.deleteTexture(maskTexture);
+ gl.deleteBuffer(buffer);
+ return canvas;
+ }
+ var figuresVertexShaderCode = '\
+ attribute vec2 a_position; \
+ attribute vec3 a_color; \
+ \
+ uniform vec2 u_resolution; \
+ uniform vec2 u_scale; \
+ uniform vec2 u_offset; \
+ \
+ varying vec4 v_color; \
+ \
+ void main() { \
+ vec2 position = (a_position + u_offset) * u_scale; \
+ vec2 clipSpace = (position / u_resolution) * 2.0 - 1.0; \
+ gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \
+ \
+ v_color = vec4(a_color / 255.0, 1.0); \
+ } ';
+ var figuresFragmentShaderCode = '\
+ precision mediump float; \
+ \
+ varying vec4 v_color; \
+ \
+ void main() { \
+ gl_FragColor = v_color; \
+ } ';
+ var figuresCache = null;
+ function initFiguresGL() {
+ var canvas, gl;
+ generateGL();
+ canvas = currentCanvas;
+ currentCanvas = null;
+ gl = currentGL;
+ currentGL = null;
+ // setup a GLSL program
+ var vertexShader = createVertexShader(gl, figuresVertexShaderCode);
+ var fragmentShader = createFragmentShader(gl, figuresFragmentShaderCode);
+ var program = createProgram(gl, [
+ vertexShader,
+ fragmentShader
+ ]);
+ gl.useProgram(program);
+ var cache = {};
+ cache.gl = gl;
+ cache.canvas = canvas;
+ cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution');
+ cache.scaleLocation = gl.getUniformLocation(program, 'u_scale');
+ cache.offsetLocation = gl.getUniformLocation(program, 'u_offset');
+ cache.positionLocation = gl.getAttribLocation(program, 'a_position');
+ cache.colorLocation = gl.getAttribLocation(program, 'a_color');
+ figuresCache = cache;
+ }
+ function drawFigures(width, height, backgroundColor, figures, context) {
+ if (!figuresCache) {
+ initFiguresGL();
+ }
+ var cache = figuresCache, canvas = cache.canvas, gl = cache.gl;
+ canvas.width = width;
+ canvas.height = height;
+ gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
+ gl.uniform2f(cache.resolutionLocation, width, height);
+ // count triangle points
+ var count = 0;
+ var i, ii, rows;
+ for (i = 0, ii = figures.length; i < ii; i++) {
+ switch (figures[i].type) {
+ case 'lattice':
+ rows = figures[i].coords.length / figures[i].verticesPerRow | 0;
+ count += (rows - 1) * (figures[i].verticesPerRow - 1) * 6;
+ break;
+ case 'triangles':
+ count += figures[i].coords.length;
+ break;
+ }
+ }
+ // transfer data
+ var coords = new Float32Array(count * 2);
+ var colors = new Uint8Array(count * 3);
+ var coordsMap = context.coords, colorsMap = context.colors;
+ var pIndex = 0, cIndex = 0;
+ for (i = 0, ii = figures.length; i < ii; i++) {
+ var figure = figures[i], ps = figure.coords, cs = figure.colors;
+ switch (figure.type) {
+ case 'lattice':
+ var cols = figure.verticesPerRow;
+ rows = ps.length / cols | 0;
+ for (var row = 1; row < rows; row++) {
+ var offset = row * cols + 1;
+ for (var col = 1; col < cols; col++, offset++) {
+ coords[pIndex] = coordsMap[ps[offset - cols - 1]];
+ coords[pIndex + 1] = coordsMap[ps[offset - cols - 1] + 1];
+ coords[pIndex + 2] = coordsMap[ps[offset - cols]];
+ coords[pIndex + 3] = coordsMap[ps[offset - cols] + 1];
+ coords[pIndex + 4] = coordsMap[ps[offset - 1]];
+ coords[pIndex + 5] = coordsMap[ps[offset - 1] + 1];
+ colors[cIndex] = colorsMap[cs[offset - cols - 1]];
+ colors[cIndex + 1] = colorsMap[cs[offset - cols - 1] + 1];
+ colors[cIndex + 2] = colorsMap[cs[offset - cols - 1] + 2];
+ colors[cIndex + 3] = colorsMap[cs[offset - cols]];
+ colors[cIndex + 4] = colorsMap[cs[offset - cols] + 1];
+ colors[cIndex + 5] = colorsMap[cs[offset - cols] + 2];
+ colors[cIndex + 6] = colorsMap[cs[offset - 1]];
+ colors[cIndex + 7] = colorsMap[cs[offset - 1] + 1];
+ colors[cIndex + 8] = colorsMap[cs[offset - 1] + 2];
+ coords[pIndex + 6] = coords[pIndex + 2];
+ coords[pIndex + 7] = coords[pIndex + 3];
+ coords[pIndex + 8] = coords[pIndex + 4];
+ coords[pIndex + 9] = coords[pIndex + 5];
+ coords[pIndex + 10] = coordsMap[ps[offset]];
+ coords[pIndex + 11] = coordsMap[ps[offset] + 1];
+ colors[cIndex + 9] = colors[cIndex + 3];
+ colors[cIndex + 10] = colors[cIndex + 4];
+ colors[cIndex + 11] = colors[cIndex + 5];
+ colors[cIndex + 12] = colors[cIndex + 6];
+ colors[cIndex + 13] = colors[cIndex + 7];
+ colors[cIndex + 14] = colors[cIndex + 8];
+ colors[cIndex + 15] = colorsMap[cs[offset]];
+ colors[cIndex + 16] = colorsMap[cs[offset] + 1];
+ colors[cIndex + 17] = colorsMap[cs[offset] + 2];
+ pIndex += 12;
+ cIndex += 18;
+ }
+ }
+ break;
+ case 'triangles':
+ for (var j = 0, jj = ps.length; j < jj; j++) {
+ coords[pIndex] = coordsMap[ps[j]];
+ coords[pIndex + 1] = coordsMap[ps[j] + 1];
+ colors[cIndex] = colorsMap[cs[j]];
+ colors[cIndex + 1] = colorsMap[cs[j] + 1];
+ colors[cIndex + 2] = colorsMap[cs[j] + 2];
+ pIndex += 2;
+ cIndex += 3;
+ }
+ break;
+ }
+ }
+ // draw
+ if (backgroundColor) {
+ gl.clearColor(backgroundColor[0] / 255, backgroundColor[1] / 255, backgroundColor[2] / 255, 1.0);
+ } else {
+ gl.clearColor(0, 0, 0, 0);
+ }
+ gl.clear(gl.COLOR_BUFFER_BIT);
+ var coordsBuffer = gl.createBuffer();
+ gl.bindBuffer(gl.ARRAY_BUFFER, coordsBuffer);
+ gl.bufferData(gl.ARRAY_BUFFER, coords, gl.STATIC_DRAW);
+ gl.enableVertexAttribArray(cache.positionLocation);
+ gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);
+ var colorsBuffer = gl.createBuffer();
+ gl.bindBuffer(gl.ARRAY_BUFFER, colorsBuffer);
+ gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW);
+ gl.enableVertexAttribArray(cache.colorLocation);
+ gl.vertexAttribPointer(cache.colorLocation, 3, gl.UNSIGNED_BYTE, false, 0, 0);
+ gl.uniform2f(cache.scaleLocation, context.scaleX, context.scaleY);
+ gl.uniform2f(cache.offsetLocation, context.offsetX, context.offsetY);
+ gl.drawArrays(gl.TRIANGLES, 0, count);
+ gl.flush();
+ gl.deleteBuffer(coordsBuffer);
+ gl.deleteBuffer(colorsBuffer);
+ return canvas;
+ }
+ function cleanup() {
+ if (smaskCache && smaskCache.canvas) {
+ smaskCache.canvas.width = 0;
+ smaskCache.canvas.height = 0;
+ }
+ if (figuresCache && figuresCache.canvas) {
+ figuresCache.canvas.width = 0;
+ figuresCache.canvas.height = 0;
+ }
+ smaskCache = null;
+ figuresCache = null;
+ }
+ return {
+ get isEnabled() {
+ if (getDefaultSetting('disableWebGL')) {
+ return false;
+ }
+ var enabled = false;
+ try {
+ generateGL();
+ enabled = !!currentGL;
+ } catch (e) {
+ }
+ return shadow(this, 'isEnabled', enabled);
+ },
+ composeSMask: composeSMask,
+ drawFigures: drawFigures,
+ clear: cleanup
+ };
+ }();
+ exports.WebGLUtils = WebGLUtils;
+ }));
+ (function (root, factory) {
+ factory(root.pdfjsDisplayPatternHelper = {}, root.pdfjsSharedUtil, root.pdfjsDisplayWebGL);
+ }(this, function (exports, sharedUtil, displayWebGL) {
+ var Util = sharedUtil.Util;
+ var info = sharedUtil.info;
+ var isArray = sharedUtil.isArray;
+ var error = sharedUtil.error;
+ var WebGLUtils = displayWebGL.WebGLUtils;
+ var ShadingIRs = {};
+ ShadingIRs.RadialAxial = {
+ fromIR: function RadialAxial_fromIR(raw) {
+ var type = raw[1];
+ var colorStops = raw[2];
+ var p0 = raw[3];
+ var p1 = raw[4];
+ var r0 = raw[5];
+ var r1 = raw[6];
+ return {
+ type: 'Pattern',
+ getPattern: function RadialAxial_getPattern(ctx) {
+ var grad;
+ if (type === 'axial') {
+ grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);
+ } else if (type === 'radial') {
+ grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1);
+ }
+ for (var i = 0, ii = colorStops.length; i < ii; ++i) {
+ var c = colorStops[i];
+ grad.addColorStop(c[0], c[1]);
+ }
+ return grad;
+ }
+ };
+ }
+ };
+ var createMeshCanvas = function createMeshCanvasClosure() {
+ function drawTriangle(data, context, p1, p2, p3, c1, c2, c3) {
+ // Very basic Gouraud-shaded triangle rasterization algorithm.
+ var coords = context.coords, colors = context.colors;
+ var bytes = data.data, rowSize = data.width * 4;
+ var tmp;
+ if (coords[p1 + 1] > coords[p2 + 1]) {
+ tmp = p1;
+ p1 = p2;
+ p2 = tmp;
+ tmp = c1;
+ c1 = c2;
+ c2 = tmp;
+ }
+ if (coords[p2 + 1] > coords[p3 + 1]) {
+ tmp = p2;
+ p2 = p3;
+ p3 = tmp;
+ tmp = c2;
+ c2 = c3;
+ c3 = tmp;
+ }
+ if (coords[p1 + 1] > coords[p2 + 1]) {
+ tmp = p1;
+ p1 = p2;
+ p2 = tmp;
+ tmp = c1;
+ c1 = c2;
+ c2 = tmp;
+ }
+ var x1 = (coords[p1] + context.offsetX) * context.scaleX;
+ var y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY;
+ var x2 = (coords[p2] + context.offsetX) * context.scaleX;
+ var y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY;
+ var x3 = (coords[p3] + context.offsetX) * context.scaleX;
+ var y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY;
+ if (y1 >= y3) {
+ return;
+ }
+ var c1r = colors[c1], c1g = colors[c1 + 1], c1b = colors[c1 + 2];
+ var c2r = colors[c2], c2g = colors[c2 + 1], c2b = colors[c2 + 2];
+ var c3r = colors[c3], c3g = colors[c3 + 1], c3b = colors[c3 + 2];
+ var minY = Math.round(y1), maxY = Math.round(y3);
+ var xa, car, cag, cab;
+ var xb, cbr, cbg, cbb;
+ var k;
+ for (var y = minY; y <= maxY; y++) {
+ if (y < y2) {
+ k = y < y1 ? 0 : y1 === y2 ? 1 : (y1 - y) / (y1 - y2);
+ xa = x1 - (x1 - x2) * k;
+ car = c1r - (c1r - c2r) * k;
+ cag = c1g - (c1g - c2g) * k;
+ cab = c1b - (c1b - c2b) * k;
+ } else {
+ k = y > y3 ? 1 : y2 === y3 ? 0 : (y2 - y) / (y2 - y3);
+ xa = x2 - (x2 - x3) * k;
+ car = c2r - (c2r - c3r) * k;
+ cag = c2g - (c2g - c3g) * k;
+ cab = c2b - (c2b - c3b) * k;
+ }
+ k = y < y1 ? 0 : y > y3 ? 1 : (y1 - y) / (y1 - y3);
+ xb = x1 - (x1 - x3) * k;
+ cbr = c1r - (c1r - c3r) * k;
+ cbg = c1g - (c1g - c3g) * k;
+ cbb = c1b - (c1b - c3b) * k;
+ var x1_ = Math.round(Math.min(xa, xb));
+ var x2_ = Math.round(Math.max(xa, xb));
+ var j = rowSize * y + x1_ * 4;
+ for (var x = x1_; x <= x2_; x++) {
+ k = (xa - x) / (xa - xb);
+ k = k < 0 ? 0 : k > 1 ? 1 : k;
+ bytes[j++] = car - (car - cbr) * k | 0;
+ bytes[j++] = cag - (cag - cbg) * k | 0;
+ bytes[j++] = cab - (cab - cbb) * k | 0;
+ bytes[j++] = 255;
+ }
+ }
+ }
+ function drawFigure(data, figure, context) {
+ var ps = figure.coords;
+ var cs = figure.colors;
+ var i, ii;
+ switch (figure.type) {
+ case 'lattice':
+ var verticesPerRow = figure.verticesPerRow;
+ var rows = Math.floor(ps.length / verticesPerRow) - 1;
+ var cols = verticesPerRow - 1;
+ for (i = 0; i < rows; i++) {
+ var q = i * verticesPerRow;
+ for (var j = 0; j < cols; j++, q++) {
+ drawTriangle(data, context, ps[q], ps[q + 1], ps[q + verticesPerRow], cs[q], cs[q + 1], cs[q + verticesPerRow]);
+ drawTriangle(data, context, ps[q + verticesPerRow + 1], ps[q + 1], ps[q + verticesPerRow], cs[q + verticesPerRow + 1], cs[q + 1], cs[q + verticesPerRow]);
+ }
+ }
+ break;
+ case 'triangles':
+ for (i = 0, ii = ps.length; i < ii; i += 3) {
+ drawTriangle(data, context, ps[i], ps[i + 1], ps[i + 2], cs[i], cs[i + 1], cs[i + 2]);
+ }
+ break;
+ default:
+ error('illigal figure');
+ break;
+ }
+ }
+ function createMeshCanvas(bounds, combinesScale, coords, colors, figures, backgroundColor, cachedCanvases) {
+ // 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
+ // We need to keep transparent border around our pattern for fill():
+ // createPattern with 'no-repeat' will bleed edges across entire area.
+ var BORDER_SIZE = 2;
+ var offsetX = Math.floor(bounds[0]);
+ var offsetY = Math.floor(bounds[1]);
+ var boundsWidth = Math.ceil(bounds[2]) - offsetX;
+ var boundsHeight = Math.ceil(bounds[3]) - offsetY;
+ var width = Math.min(Math.ceil(Math.abs(boundsWidth * combinesScale[0] * EXPECTED_SCALE)), MAX_PATTERN_SIZE);
+ var height = Math.min(Math.ceil(Math.abs(boundsHeight * combinesScale[1] * EXPECTED_SCALE)), MAX_PATTERN_SIZE);
+ var scaleX = boundsWidth / width;
+ var scaleY = boundsHeight / height;
+ var context = {
+ coords: coords,
+ colors: colors,
+ offsetX: -offsetX,
+ offsetY: -offsetY,
+ scaleX: 1 / scaleX,
+ scaleY: 1 / scaleY
+ };
+ var paddedWidth = width + BORDER_SIZE * 2;
+ var paddedHeight = height + BORDER_SIZE * 2;
+ var canvas, tmpCanvas, i, ii;
+ if (WebGLUtils.isEnabled) {
+ canvas = WebGLUtils.drawFigures(width, height, backgroundColor, figures, context);
+ // https://bugzilla.mozilla.org/show_bug.cgi?id=972126
+ tmpCanvas = cachedCanvases.getCanvas('mesh', paddedWidth, paddedHeight, false);
+ tmpCanvas.context.drawImage(canvas, BORDER_SIZE, BORDER_SIZE);
+ canvas = tmpCanvas.canvas;
+ } else {
+ tmpCanvas = cachedCanvases.getCanvas('mesh', paddedWidth, paddedHeight, false);
+ var tmpCtx = tmpCanvas.context;
+ var data = tmpCtx.createImageData(width, height);
+ if (backgroundColor) {
+ var bytes = data.data;
+ for (i = 0, ii = bytes.length; i < ii; i += 4) {
+ bytes[i] = backgroundColor[0];
+ bytes[i + 1] = backgroundColor[1];
+ bytes[i + 2] = backgroundColor[2];
+ bytes[i + 3] = 255;
+ }
+ }
+ for (i = 0; i < figures.length; i++) {
+ drawFigure(data, figures[i], context);
+ }
+ tmpCtx.putImageData(data, BORDER_SIZE, BORDER_SIZE);
+ canvas = tmpCanvas.canvas;
+ }
+ return {
+ canvas: canvas,
+ offsetX: offsetX - BORDER_SIZE * scaleX,
+ offsetY: offsetY - BORDER_SIZE * scaleY,
+ scaleX: scaleX,
+ scaleY: scaleY
+ };
+ }
+ return createMeshCanvas;
+ }();
+ ShadingIRs.Mesh = {
+ fromIR: function Mesh_fromIR(raw) {
+ //var type = raw[1];
+ var coords = raw[2];
+ var colors = raw[3];
+ var figures = raw[4];
+ var bounds = raw[5];
+ var matrix = raw[6];
+ //var bbox = raw[7];
+ var background = raw[8];
+ return {
+ type: 'Pattern',
+ getPattern: function Mesh_getPattern(ctx, owner, shadingFill) {
+ var scale;
+ if (shadingFill) {
+ scale = Util.singularValueDecompose2dScale(ctx.mozCurrentTransform);
+ } else {
+ // Obtain scale from matrix and current transformation matrix.
+ scale = Util.singularValueDecompose2dScale(owner.baseTransform);
+ if (matrix) {
+ var matrixScale = Util.singularValueDecompose2dScale(matrix);
+ scale = [
+ scale[0] * matrixScale[0],
+ scale[1] * matrixScale[1]
+ ];
+ }
+ }
+ // Rasterizing on the main thread since sending/queue large canvases
+ // might cause OOM.
+ var temporaryPatternCanvas = createMeshCanvas(bounds, scale, coords, colors, figures, shadingFill ? null : background, owner.cachedCanvases);
+ if (!shadingFill) {
+ ctx.setTransform.apply(ctx, owner.baseTransform);
+ if (matrix) {
+ ctx.transform.apply(ctx, matrix);
+ }
+ }
+ ctx.translate(temporaryPatternCanvas.offsetX, temporaryPatternCanvas.offsetY);
+ ctx.scale(temporaryPatternCanvas.scaleX, temporaryPatternCanvas.scaleY);
+ return ctx.createPattern(temporaryPatternCanvas.canvas, 'no-repeat');
+ }
+ };
+ }
+ };
+ ShadingIRs.Dummy = {
+ fromIR: function Dummy_fromIR() {
+ return {
+ type: 'Pattern',
+ getPattern: function Dummy_fromIR_getPattern() {
+ return 'hotpink';
+ }
+ };
+ }
+ };
+ function getShadingPatternFromIR(raw) {
+ var shadingIR = ShadingIRs[raw[0]];
+ if (!shadingIR) {
+ error('Unknown IR type: ' + raw[0]);
+ }
+ return shadingIR.fromIR(raw);
+ }
+ var TilingPattern = function TilingPatternClosure() {
+ var PaintType = {
+ COLORED: 1,
+ UNCOLORED: 2
+ };
+ var MAX_PATTERN_SIZE = 3000;
+ // 10in @ 300dpi shall be enough
+ function TilingPattern(IR, color, ctx, canvasGraphicsFactory, baseTransform) {
+ 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.canvasGraphicsFactory = canvasGraphicsFactory;
+ 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 canvasGraphicsFactory = this.canvasGraphicsFactory;
+ 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 = owner.cachedCanvases.getCanvas('pattern', width, height, true);
+ var tmpCtx = tmpCanvas.context;
+ var graphics = canvasGraphicsFactory.createCanvasGraphics(tmpCtx);
+ 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) && bbox.length === 4) {
+ var bboxWidth = x1 - x0;
+ var bboxHeight = y1 - y0;
+ graphics.ctx.rect(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 cssColor = Util.makeCssRgb(color[0], color[1], color[2]);
+ context.fillStyle = cssColor;
+ context.strokeStyle = cssColor;
+ break;
+ default:
+ error('Unsupported paint type: ' + paintType);
+ }
+ },
+ getPattern: function TilingPattern_getPattern(ctx, owner) {
+ var temporaryPatternCanvas = this.createPatternCanvas(owner);
+ ctx = this.ctx;
+ ctx.setTransform.apply(ctx, this.baseTransform);
+ ctx.transform.apply(ctx, this.matrix);
+ this.scaleToContext();
+ return ctx.createPattern(temporaryPatternCanvas, 'repeat');
+ }
+ };
+ return TilingPattern;
+ }();
+ exports.getShadingPatternFromIR = getShadingPatternFromIR;
+ exports.TilingPattern = TilingPattern;
+ }));
+ (function (root, factory) {
+ factory(root.pdfjsDisplayCanvas = {}, root.pdfjsSharedUtil, root.pdfjsDisplayDOMUtils, root.pdfjsDisplayPatternHelper, root.pdfjsDisplayWebGL);
+ }(this, function (exports, sharedUtil, displayDOMUtils, displayPatternHelper, displayWebGL) {
+ var FONT_IDENTITY_MATRIX = sharedUtil.FONT_IDENTITY_MATRIX;
+ var IDENTITY_MATRIX = sharedUtil.IDENTITY_MATRIX;
+ var ImageKind = sharedUtil.ImageKind;
+ var OPS = sharedUtil.OPS;
+ var TextRenderingMode = sharedUtil.TextRenderingMode;
+ var Uint32ArrayView = sharedUtil.Uint32ArrayView;
+ var Util = sharedUtil.Util;
+ var assert = sharedUtil.assert;
+ var info = sharedUtil.info;
+ var isNum = sharedUtil.isNum;
+ var isArray = sharedUtil.isArray;
+ var isLittleEndian = sharedUtil.isLittleEndian;
+ var error = sharedUtil.error;
+ var shadow = sharedUtil.shadow;
+ var warn = sharedUtil.warn;
+ var TilingPattern = displayPatternHelper.TilingPattern;
+ var getShadingPatternFromIR = displayPatternHelper.getShadingPatternFromIR;
+ var WebGLUtils = displayWebGL.WebGLUtils;
+ var hasCanvasTypedArrays = displayDOMUtils.hasCanvasTypedArrays;
+ // <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;
+ // Maximum font size that would be used during canvas fillText operations.
+ var MAX_FONT_SIZE = 100;
+ var MAX_GROUP_SIZE = 4096;
+ // Heuristic value used when enforcing minimum line widths.
+ var MIN_WIDTH_FACTOR = 0.65;
+ var COMPILE_TYPE3_GLYPHS = true;
+ var MAX_SIZE_TO_COMPILE = 1000;
+ var FULL_CHUNK_HEIGHT = 16;
+ var HasCanvasTypedArraysCached = {
+ get value() {
+ return shadow(HasCanvasTypedArraysCached, 'value', hasCanvasTypedArrays());
+ }
+ };
+ var IsLittleEndianCached = {
+ get value() {
+ return shadow(IsLittleEndianCached, 'value', isLittleEndian());
+ }
+ };
+ 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 one.
+ if (!ctx.mozCurrentTransform) {
+ 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._transformMatrix || [
+ 1,
+ 0,
+ 0,
+ 1,
+ 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() {
+ function CachedCanvases() {
+ this.cache = Object.create(null);
+ }
+ CachedCanvases.prototype = {
+ getCanvas: function CachedCanvases_getCanvas(id, width, height, trackTransform) {
+ var canvasEntry;
+ if (this.cache[id] !== undefined) {
+ canvasEntry = this.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);
+ }
+ this.cache[id] = canvasEntry = {
+ canvas: canvas,
+ context: ctx
+ };
+ }
+ return canvasEntry;
+ },
+ clear: function () {
+ for (var id in this.cache) {
+ var canvasEntry = this.cache[id];
+ // Zeroing the width and height causes Firefox to release graphics
+ // resources immediately, which can greatly reduce memory consumption.
+ canvasEntry.canvas.width = 0;
+ canvasEntry.canvas.height = 0;
+ delete this.cache[id];
+ }
+ }
+ };
+ return CachedCanvases;
+ }();
+ 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.textMatrixScale = 1;
+ 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;
+ // Default fore and background colors
+ this.fillColor = '#000000';
+ this.strokeColor = '#000000';
+ this.patternFill = false;
+ // Note: fill alpha applies to all non-stroking operations
+ this.fillAlpha = 1;
+ this.strokeAlpha = 1;
+ this.lineWidth = 1;
+ this.activeSMask = null;
+ this.resumeSMaskCtx = 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;
+ // Defines the number of steps before checking the execution time
+ var EXECUTION_STEPS = 10;
+ function CanvasGraphics(canvasCtx, commonObjs, objs, imageLayer) {
+ this.ctx = canvasCtx;
+ this.current = new CanvasExtraState();
+ this.stateStack = [];
+ this.pendingClip = null;
+ this.pendingEOFill = false;
+ this.res = null;
+ this.xobjs = null;
+ this.commonObjs = commonObjs;
+ this.objs = objs;
+ this.imageLayer = imageLayer;
+ this.groupStack = [];
+ this.processingType3 = null;
+ // Patterns are painted relative to the initial page/form transform, see pdf
+ // spec 8.7.2 NOTE 1.
+ this.baseTransform = null;
+ this.baseTransformStack = [];
+ this.groupLevel = 0;
+ this.smaskStack = [];
+ this.smaskCounter = 0;
+ this.tempSMask = null;
+ this.cachedCanvases = new CachedCanvases();
+ if (canvasCtx) {
+ // NOTE: if mozCurrentTransform is polyfilled, then the current state of
+ // the transformation must already be set in canvasCtx._transformMatrix.
+ addContextCurrentTransform(canvasCtx);
+ }
+ this.cachedGetSinglePixelWidth = null;
+ }
+ 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 partialChunkHeight = height % FULL_CHUNK_HEIGHT;
+ var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;
+ var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;
+ var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);
+ var srcPos = 0, destPos;
+ var src = imgData.data;
+ var dest = chunkImgData.data;
+ var i, j, thisChunkHeight, elemsInThisChunk;
+ // There are multiple forms in which the pixel data can be passed, and
+ // imgData.kind tells us which one this is.
+ if (imgData.kind === ImageKind.GRAYSCALE_1BPP) {
+ // Grayscale, 1 bit per pixel (i.e. black-and-white).
+ var srcLength = src.byteLength;
+ var dest32 = HasCanvasTypedArraysCached.value ? new Uint32Array(dest.buffer) : new Uint32ArrayView(dest);
+ var dest32DataLength = dest32.length;
+ var fullSrcDiff = width + 7 >> 3;
+ var white = 0xFFFFFFFF;
+ var black = IsLittleEndianCached.value || !HasCanvasTypedArraysCached.value ? 0xFF000000 : 0x000000FF;
+ for (i = 0; i < totalChunks; i++) {
+ thisChunkHeight = i < fullChunks ? FULL_CHUNK_HEIGHT : partialChunkHeight;
+ destPos = 0;
+ for (j = 0; j < thisChunkHeight; j++) {
+ var srcDiff = srcLength - srcPos;
+ var k = 0;
+ var kEnd = srcDiff > fullSrcDiff ? width : srcDiff * 8 - 7;
+ var kEndUnrolled = kEnd & ~7;
+ var mask = 0;
+ var srcByte = 0;
+ for (; k < kEndUnrolled; k += 8) {
+ srcByte = src[srcPos++];
+ dest32[destPos++] = srcByte & 128 ? white : black;
+ dest32[destPos++] = srcByte & 64 ? white : black;
+ dest32[destPos++] = srcByte & 32 ? white : black;
+ dest32[destPos++] = srcByte & 16 ? white : black;
+ dest32[destPos++] = srcByte & 8 ? white : black;
+ dest32[destPos++] = srcByte & 4 ? white : black;
+ dest32[destPos++] = srcByte & 2 ? white : black;
+ dest32[destPos++] = srcByte & 1 ? white : black;
+ }
+ for (; k < kEnd; k++) {
+ if (mask === 0) {
+ srcByte = src[srcPos++];
+ mask = 128;
+ }
+ dest32[destPos++] = srcByte & mask ? white : black;
+ mask >>= 1;
+ }
+ }
+ // We ran out of input. Make all remaining pixels transparent.
+ while (destPos < dest32DataLength) {
+ dest32[destPos++] = 0;
+ }
+ ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
+ }
+ } else if (imgData.kind === ImageKind.RGBA_32BPP) {
+ // RGBA, 32-bits per pixel.
+ j = 0;
+ elemsInThisChunk = width * FULL_CHUNK_HEIGHT * 4;
+ for (i = 0; i < fullChunks; i++) {
+ dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));
+ srcPos += elemsInThisChunk;
+ ctx.putImageData(chunkImgData, 0, j);
+ j += FULL_CHUNK_HEIGHT;
+ }
+ if (i < totalChunks) {
+ elemsInThisChunk = width * partialChunkHeight * 4;
+ dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));
+ ctx.putImageData(chunkImgData, 0, j);
+ }
+ } else if (imgData.kind === ImageKind.RGB_24BPP) {
+ // RGB, 24-bits per pixel.
+ thisChunkHeight = FULL_CHUNK_HEIGHT;
+ elemsInThisChunk = width * thisChunkHeight;
+ for (i = 0; i < totalChunks; i++) {
+ if (i >= fullChunks) {
+ thisChunkHeight = partialChunkHeight;
+ elemsInThisChunk = width * thisChunkHeight;
+ }
+ destPos = 0;
+ for (j = elemsInThisChunk; j--;) {
+ dest[destPos++] = src[srcPos++];
+ dest[destPos++] = src[srcPos++];
+ dest[destPos++] = src[srcPos++];
+ dest[destPos++] = 255;
+ }
+ ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
+ }
+ } else {
+ error('bad image kind: ' + imgData.kind);
+ }
+ }
+ function putBinaryImageMask(ctx, imgData) {
+ var height = imgData.height, width = imgData.width;
+ var partialChunkHeight = height % FULL_CHUNK_HEIGHT;
+ var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;
+ var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;
+ var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);
+ var srcPos = 0;
+ var src = imgData.data;
+ var dest = chunkImgData.data;
+ for (var i = 0; i < totalChunks; i++) {
+ var thisChunkHeight = i < fullChunks ? FULL_CHUNK_HEIGHT : 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 * FULL_CHUNK_HEIGHT);
+ }
+ }
+ 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 (sourceCtx[property] !== undefined) {
+ destCtx[property] = sourceCtx[property];
+ }
+ }
+ if (sourceCtx.setLineDash !== undefined) {
+ destCtx.setLineDash(sourceCtx.getLineDash());
+ destCtx.lineDashOffset = sourceCtx.lineDashOffset;
+ }
+ }
+ function composeSMaskBackdrop(bytes, r0, g0, b0) {
+ var length = bytes.length;
+ for (var i = 3; i < length; i += 4) {
+ var alpha = bytes[i];
+ if (alpha === 0) {
+ bytes[i - 3] = r0;
+ bytes[i - 2] = g0;
+ bytes[i - 1] = b0;
+ } else if (alpha < 255) {
+ var alpha_ = 255 - alpha;
+ bytes[i - 3] = bytes[i - 3] * alpha + r0 * alpha_ >> 8;
+ bytes[i - 2] = bytes[i - 2] * alpha + g0 * alpha_ >> 8;
+ bytes[i - 1] = bytes[i - 1] * alpha + b0 * alpha_ >> 8;
+ }
+ }
+ }
+ function composeSMaskAlpha(maskData, layerData, transferMap) {
+ var length = maskData.length;
+ var scale = 1 / 255;
+ for (var i = 3; i < length; i += 4) {
+ var alpha = transferMap ? transferMap[maskData[i]] : maskData[i];
+ layerData[i] = layerData[i] * alpha * scale | 0;
+ }
+ }
+ function composeSMaskLuminosity(maskData, layerData, transferMap) {
+ var length = maskData.length;
+ for (var i = 3; i < length; i += 4) {
+ var y = maskData[i - 3] * 77 + // * 0.3 / 255 * 0x10000
+ maskData[i - 2] * 152 + // * 0.59 ....
+ maskData[i - 1] * 28;
+ // * 0.11 ....
+ layerData[i] = transferMap ? layerData[i] * transferMap[y >> 8] >> 8 : layerData[i] * y >> 16;
+ }
+ }
+ function genericComposeSMask(maskCtx, layerCtx, width, height, subtype, backdrop, transferMap) {
+ var hasBackdrop = !!backdrop;
+ var r0 = hasBackdrop ? backdrop[0] : 0;
+ var g0 = hasBackdrop ? backdrop[1] : 0;
+ var b0 = hasBackdrop ? backdrop[2] : 0;
+ var composeFn;
+ if (subtype === 'Luminosity') {
+ composeFn = composeSMaskLuminosity;
+ } else {
+ composeFn = composeSMaskAlpha;
+ }
+ // processing image in chunks to save memory
+ var PIXELS_TO_PROCESS = 1048576;
+ var chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width));
+ for (var row = 0; row < height; row += chunkSize) {
+ var chunkHeight = Math.min(chunkSize, height - row);
+ var maskData = maskCtx.getImageData(0, row, width, chunkHeight);
+ var layerData = layerCtx.getImageData(0, row, width, chunkHeight);
+ if (hasBackdrop) {
+ composeSMaskBackdrop(maskData.data, r0, g0, b0);
+ }
+ composeFn(maskData.data, layerData.data, transferMap);
+ maskCtx.putImageData(layerData, 0, row);
+ }
+ }
+ function composeSMask(ctx, smask, layerCtx) {
+ var mask = smask.canvas;
+ var maskCtx = smask.context;
+ ctx.setTransform(smask.scaleX, 0, 0, smask.scaleY, smask.offsetX, smask.offsetY);
+ var backdrop = smask.backdrop || null;
+ if (!smask.transferMap && WebGLUtils.isEnabled) {
+ var composed = WebGLUtils.composeSMask(layerCtx.canvas, mask, {
+ subtype: smask.subtype,
+ backdrop: backdrop
+ });
+ ctx.setTransform(1, 0, 0, 1, 0, 0);
+ ctx.drawImage(composed, smask.offsetX, smask.offsetY);
+ return;
+ }
+ genericComposeSMask(maskCtx, layerCtx, mask.width, mask.height, smask.subtype, backdrop, smask.transferMap);
+ ctx.drawImage(mask, 0, 0);
+ }
+ var LINE_CAP_STYLES = [
+ 'butt',
+ 'round',
+ 'square'
+ ];
+ var LINE_JOIN_STYLES = [
+ 'miter',
+ 'round',
+ 'bevel'
+ ];
+ var NORMAL_CLIP = {};
+ var EO_CLIP = {};
+ CanvasGraphics.prototype = {
+ beginDrawing: function CanvasGraphics_beginDrawing(transform, 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, creating temporary
+ // transparent canvas when we have blend modes.
+ var width = this.ctx.canvas.width;
+ var height = this.ctx.canvas.height;
+ this.ctx.save();
+ this.ctx.fillStyle = 'rgb(255, 255, 255)';
+ this.ctx.fillRect(0, 0, width, height);
+ this.ctx.restore();
+ if (transparency) {
+ var transparentCanvas = this.cachedCanvases.getCanvas('transparent', width, height, true);
+ this.compositeCtx = this.ctx;
+ this.transparentCanvas = transparentCanvas.canvas;
+ this.ctx = transparentCanvas.context;
+ this.ctx.save();
+ // The transform can be applied before rendering, transferring it to
+ // the new canvas.
+ this.ctx.transform.apply(this.ctx, this.compositeCtx.mozCurrentTransform);
+ }
+ this.ctx.save();
+ if (transform) {
+ this.ctx.transform.apply(this.ctx, transform);
+ }
+ this.ctx.transform.apply(this.ctx, viewport.transform);
+ this.baseTransform = this.ctx.mozCurrentTransform.slice();
+ if (this.imageLayer) {
+ this.imageLayer.beginLayout();
+ }
+ },
+ executeOperatorList: function CanvasGraphics_executeOperatorList(operatorList, executionStartIdx, continueCallback, stepper) {
+ var argsArray = operatorList.argsArray;
+ var fnArray = operatorList.fnArray;
+ var i = executionStartIdx || 0;
+ var argsArrayLen = argsArray.length;
+ // Sometimes the OperatorList to execute is empty.
+ if (argsArrayLen === i) {
+ return i;
+ }
+ var chunkOperations = argsArrayLen - i > EXECUTION_STEPS && typeof continueCallback === 'function';
+ var endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0;
+ var steps = 0;
+ var commonObjs = this.commonObjs;
+ var objs = this.objs;
+ var fnId;
+ while (true) {
+ if (stepper !== undefined && 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[0] === 'g' && depObjId[1] === '_';
+ var objsPool = common ? commonObjs : objs;
+ // If the promise isn't resolved yet, add the continueCallback
+ // to the promise and bail out.
+ if (!objsPool.isResolved(depObjId)) {
+ objsPool.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 and
+ // `continueCallback` is specified, interrupt the execution.
+ if (chunkOperations && ++steps > EXECUTION_STEPS) {
+ if (Date.now() > endTime) {
+ continueCallback();
+ return i;
+ }
+ steps = 0;
+ }
+ }
+ },
+ // If the operatorList isn't executed completely yet OR the execution
+ // time was short enough, do another execution round.
+ endDrawing: function CanvasGraphics_endDrawing() {
+ // Finishing all opened operations such as SMask group painting.
+ if (this.current.activeSMask !== null) {
+ this.endSMaskGroup();
+ }
+ this.ctx.restore();
+ if (this.transparentCanvas) {
+ this.ctx = this.compositeCtx;
+ this.ctx.save();
+ this.ctx.setTransform(1, 0, 0, 1, 0, 0);
+ // Avoid apply transform twice
+ this.ctx.drawImage(this.transparentCanvas, 0, 0);
+ this.ctx.restore();
+ this.transparentCanvas = null;
+ }
+ this.cachedCanvases.clear();
+ WebGLUtils.clear();
+ if (this.imageLayer) {
+ this.imageLayer.endLayout();
+ }
+ },
+ // Graphics state
+ setLineWidth: function CanvasGraphics_setLineWidth(width) {
+ this.current.lineWidth = width;
+ this.ctx.lineWidth = width;
+ },
+ setLineCap: function CanvasGraphics_setLineCap(style) {
+ this.ctx.lineCap = LINE_CAP_STYLES[style];
+ },
+ setLineJoin: function CanvasGraphics_setLineJoin(style) {
+ this.ctx.lineJoin = LINE_JOIN_STYLES[style];
+ },
+ setMiterLimit: function CanvasGraphics_setMiterLimit(limit) {
+ this.ctx.miterLimit = limit;
+ },
+ setDash: function CanvasGraphics_setDash(dashArray, dashPhase) {
+ var ctx = this.ctx;
+ if (ctx.setLineDash !== undefined) {
+ ctx.setLineDash(dashArray);
+ ctx.lineDashOffset = dashPhase;
+ }
+ },
+ setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) {
+ },
+ setFlatness: function CanvasGraphics_setFlatness(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) {
+ // If SMask is currrenly used, it needs to be suspended or
+ // finished. Suspend only makes sense when at least one save()
+ // was performed and state needs to be reverted on restore().
+ if (this.stateStack.length > 0 && this.stateStack[this.stateStack.length - 1].activeSMask === this.current.activeSMask) {
+ this.suspendSMaskGroup();
+ } else {
+ 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 = this.cachedCanvases.getCanvas(cacheId, drawnWidth, drawnHeight, true);
+ var currentCtx = this.ctx;
+ var currentTransform = currentCtx.mozCurrentTransform;
+ this.ctx.save();
+ var groupCtx = scratchCanvas.context;
+ groupCtx.scale(1 / activeSMask.scaleX, 1 / activeSMask.scaleY);
+ groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY);
+ groupCtx.transform.apply(groupCtx, currentTransform);
+ activeSMask.startTransformInverse = groupCtx.mozCurrentTransformInverse;
+ copyCtxState(currentCtx, groupCtx);
+ this.ctx = groupCtx;
+ this.setGState([
+ [
+ 'BM',
+ 'Normal'
+ ],
+ [
+ 'ca',
+ 1
+ ],
+ [
+ 'CA',
+ 1
+ ]
+ ]);
+ this.groupStack.push(currentCtx);
+ this.groupLevel++;
+ },
+ suspendSMaskGroup: function CanvasGraphics_endSMaskGroup() {
+ // Similar to endSMaskGroup, the intermediate canvas has to be composed
+ // and future ctx state restored.
+ var groupCtx = this.ctx;
+ this.groupLevel--;
+ this.ctx = this.groupStack.pop();
+ composeSMask(this.ctx, this.current.activeSMask, groupCtx);
+ this.ctx.restore();
+ this.ctx.save();
+ // save is needed since SMask will be resumed.
+ copyCtxState(groupCtx, this.ctx);
+ // Saving state for resuming.
+ this.current.resumeSMaskCtx = groupCtx;
+ // Transform was changed in the SMask canvas, reflecting this change on
+ // this.ctx.
+ var deltaTransform = Util.transform(this.current.activeSMask.startTransformInverse, groupCtx.mozCurrentTransform);
+ this.ctx.transform.apply(this.ctx, deltaTransform);
+ // SMask was composed, the results at the groupCtx can be cleared.
+ groupCtx.save();
+ groupCtx.setTransform(1, 0, 0, 1, 0, 0);
+ groupCtx.clearRect(0, 0, groupCtx.canvas.width, groupCtx.canvas.height);
+ groupCtx.restore();
+ },
+ resumeSMaskGroup: function CanvasGraphics_endSMaskGroup() {
+ // Resuming state saved by suspendSMaskGroup. We don't need to restore
+ // any groupCtx state since restore() command (the only caller) will do
+ // that for us. See also beginSMaskGroup.
+ var groupCtx = this.current.resumeSMaskCtx;
+ var currentCtx = this.ctx;
+ this.ctx = groupCtx;
+ 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();
+ copyCtxState(groupCtx, this.ctx);
+ // Transform was changed in the SMask canvas, reflecting this change on
+ // this.ctx.
+ var deltaTransform = Util.transform(this.current.activeSMask.startTransformInverse, groupCtx.mozCurrentTransform);
+ this.ctx.transform.apply(this.ctx, deltaTransform);
+ },
+ save: function CanvasGraphics_save() {
+ this.ctx.save();
+ var old = this.current;
+ this.stateStack.push(old);
+ this.current = old.clone();
+ this.current.resumeSMaskCtx = null;
+ },
+ restore: function CanvasGraphics_restore() {
+ // SMask was suspended, we just need to resume it.
+ if (this.current.resumeSMaskCtx) {
+ this.resumeSMaskGroup();
+ }
+ // SMask has to be finished once there is no states that are using the
+ // same SMask.
+ if (this.current.activeSMask !== null && (this.stateStack.length === 0 || this.stateStack[this.stateStack.length - 1].activeSMask !== this.current.activeSMask)) {
+ this.endSMaskGroup();
+ }
+ if (this.stateStack.length !== 0) {
+ this.current = this.stateStack.pop();
+ this.ctx.restore();
+ // Ensure that the clipping path is reset (fixes issue6413.pdf).
+ this.pendingClip = null;
+ this.cachedGetSinglePixelWidth = null;
+ }
+ },
+ transform: function CanvasGraphics_transform(a, b, c, d, e, f) {
+ this.ctx.transform(a, b, c, d, e, f);
+ this.cachedGetSinglePixelWidth = null;
+ },
+ // Path
+ constructPath: function CanvasGraphics_constructPath(ops, args) {
+ var ctx = this.ctx;
+ var current = this.current;
+ var x = current.x, y = current.y;
+ for (var i = 0, j = 0, ii = ops.length; i < ii; i++) {
+ switch (ops[i] | 0) {
+ case OPS.rectangle:
+ x = args[j++];
+ y = args[j++];
+ var width = args[j++];
+ var height = args[j++];
+ if (width === 0) {
+ width = this.getSinglePixelWidth();
+ }
+ if (height === 0) {
+ height = this.getSinglePixelWidth();
+ }
+ var xw = x + width;
+ var yh = y + height;
+ this.ctx.moveTo(x, y);
+ this.ctx.lineTo(xw, y);
+ this.ctx.lineTo(xw, yh);
+ this.ctx.lineTo(x, yh);
+ this.ctx.lineTo(x, y);
+ this.ctx.closePath();
+ break;
+ case OPS.moveTo:
+ x = args[j++];
+ y = args[j++];
+ ctx.moveTo(x, y);
+ break;
+ case OPS.lineTo:
+ x = args[j++];
+ y = args[j++];
+ ctx.lineTo(x, y);
+ break;
+ case OPS.curveTo:
+ x = args[j + 4];
+ y = args[j + 5];
+ ctx.bezierCurveTo(args[j], args[j + 1], args[j + 2], args[j + 3], x, y);
+ j += 6;
+ break;
+ case OPS.curveTo2:
+ ctx.bezierCurveTo(x, y, args[j], args[j + 1], args[j + 2], args[j + 3]);
+ x = args[j + 2];
+ y = args[j + 3];
+ j += 4;
+ break;
+ case OPS.curveTo3:
+ x = args[j + 2];
+ y = args[j + 3];
+ ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y);
+ j += 4;
+ break;
+ case OPS.closePath:
+ ctx.closePath();
+ break;
+ }
+ }
+ current.setCurrentPoint(x, y);
+ },
+ closePath: function CanvasGraphics_closePath() {
+ this.ctx.closePath();
+ },
+ stroke: function CanvasGraphics_stroke(consumePath) {
+ consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
+ var ctx = this.ctx;
+ var strokeColor = this.current.strokeColor;
+ // Prevent drawing too thin lines by enforcing a minimum line width.
+ ctx.lineWidth = Math.max(this.getSinglePixelWidth() * MIN_WIDTH_FACTOR, this.current.lineWidth);
+ // 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 isPatternFill = this.current.patternFill;
+ var needRestore = false;
+ if (isPatternFill) {
+ ctx.save();
+ if (this.baseTransform) {
+ ctx.setTransform.apply(ctx, this.baseTransform);
+ }
+ ctx.fillStyle = fillColor.getPattern(ctx, this);
+ needRestore = true;
+ }
+ if (this.pendingEOFill) {
+ if (ctx.mozFillRule !== undefined) {
+ ctx.mozFillRule = 'evenodd';
+ ctx.fill();
+ ctx.mozFillRule = 'nonzero';
+ } else {
+ ctx.fill('evenodd');
+ }
+ this.pendingEOFill = false;
+ } else {
+ 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.textMatrixScale = 1;
+ this.current.x = this.current.lineX = 0;
+ this.current.y = this.current.lineY = 0;
+ },
+ endText: function CanvasGraphics_endText() {
+ var paths = this.pendingTextPaths;
+ var ctx = this.ctx;
+ if (paths === undefined) {
+ ctx.beginPath();
+ return;
+ }
+ 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.isType3Font) {
+ return;
+ }
+ // we don't need ctx.font for Type3 fonts
+ var name = fontObj.loadedName || 'sans-serif';
+ var bold = fontObj.black ? fontObj.bold ? '900' : '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 ? MIN_FONT_SIZE : size > MAX_FONT_SIZE ? MAX_FONT_SIZE : size;
+ this.current.fontSizeScale = size / browserFontSize;
+ 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.textMatrixScale = Math.sqrt(a * a + b * b);
+ this.current.x = this.current.lineX = 0;
+ this.current.y = this.current.lineY = 0;
+ },
+ nextLine: function CanvasGraphics_nextLine() {
+ this.moveText(0, this.current.leading);
+ },
+ paintChar: function CanvasGraphics_paintChar(character, x, y) {
+ var ctx = this.ctx;
+ var current = this.current;
+ var font = current.font;
+ var textRenderingMode = current.textRenderingMode;
+ var fontSize = current.fontSize / current.fontSizeScale;
+ var fillStrokeMode = textRenderingMode & TextRenderingMode.FILL_STROKE_MASK;
+ var isAddToPathSet = !!(textRenderingMode & TextRenderingMode.ADD_TO_PATH_FLAG);
+ var addToPath;
+ if (font.disableFontFace || isAddToPathSet) {
+ addToPath = font.getPathGenerator(this.commonObjs, character);
+ }
+ if (font.disableFontFace) {
+ ctx.save();
+ ctx.translate(x, y);
+ ctx.beginPath();
+ addToPath(ctx, fontSize);
+ if (fillStrokeMode === TextRenderingMode.FILL || fillStrokeMode === TextRenderingMode.FILL_STROKE) {
+ ctx.fill();
+ }
+ if (fillStrokeMode === TextRenderingMode.STROKE || fillStrokeMode === TextRenderingMode.FILL_STROKE) {
+ ctx.stroke();
+ }
+ ctx.restore();
+ } else {
+ if (fillStrokeMode === TextRenderingMode.FILL || fillStrokeMode === TextRenderingMode.FILL_STROKE) {
+ ctx.fillText(character, x, y);
+ }
+ if (fillStrokeMode === TextRenderingMode.STROKE || fillStrokeMode === TextRenderingMode.FILL_STROKE) {
+ ctx.strokeText(character, x, y);
+ }
+ }
+ if (isAddToPathSet) {
+ var paths = this.pendingTextPaths || (this.pendingTextPaths = []);
+ paths.push({
+ transform: ctx.mozCurrentTransform,
+ x: x,
+ y: y,
+ fontSize: fontSize,
+ addToPath: addToPath
+ });
+ }
+ },
+ get isFontSubpixelAAEnabled() {
+ // Checks if anti-aliasing is enabled when scaled text is painted.
+ // On Windows GDI scaled fonts looks bad.
+ var ctx = document.createElement('canvas').getContext('2d');
+ ctx.scale(1.5, 1);
+ ctx.fillText('I', 0, 10);
+ var data = ctx.getImageData(0, 0, 10, 10).data;
+ var enabled = false;
+ for (var i = 3; i < data.length; i += 4) {
+ if (data[i] > 0 && data[i] < 255) {
+ enabled = true;
+ break;
+ }
+ }
+ return shadow(this, 'isFontSubpixelAAEnabled', enabled);
+ },
+ showText: function CanvasGraphics_showText(glyphs) {
+ var current = this.current;
+ var font = current.font;
+ if (font.isType3Font) {
+ return this.showType3Text(glyphs);
+ }
+ var fontSize = current.fontSize;
+ if (fontSize === 0) {
+ return;
+ }
+ var ctx = this.ctx;
+ var fontSizeScale = current.fontSizeScale;
+ var charSpacing = current.charSpacing;
+ var wordSpacing = current.wordSpacing;
+ var fontDirection = current.fontDirection;
+ var textHScale = current.textHScale * fontDirection;
+ var glyphsLength = glyphs.length;
+ var vertical = font.vertical;
+ var spacingDir = vertical ? 1 : -1;
+ var defaultVMetrics = font.defaultVMetrics;
+ var widthAdvanceScale = fontSize * current.fontMatrix[0];
+ var simpleFillText = current.textRenderingMode === TextRenderingMode.FILL && !font.disableFontFace;
+ ctx.save();
+ ctx.transform.apply(ctx, current.textMatrix);
+ ctx.translate(current.x, current.y + current.textRise);
+ if (current.patternFill) {
+ // TODO: Some shading patterns are not applied correctly to text,
+ // e.g. issues 3988 and 5432, and ShowText-ShadingPattern.pdf.
+ ctx.fillStyle = current.fillColor.getPattern(ctx, this);
+ }
+ if (fontDirection > 0) {
+ ctx.scale(textHScale, -1);
+ } else {
+ ctx.scale(textHScale, 1);
+ }
+ var lineWidth = current.lineWidth;
+ var scale = current.textMatrixScale;
+ if (scale === 0 || lineWidth === 0) {
+ var fillStrokeMode = current.textRenderingMode & TextRenderingMode.FILL_STROKE_MASK;
+ if (fillStrokeMode === TextRenderingMode.STROKE || fillStrokeMode === TextRenderingMode.FILL_STROKE) {
+ this.cachedGetSinglePixelWidth = null;
+ lineWidth = this.getSinglePixelWidth() * MIN_WIDTH_FACTOR;
+ }
+ } else {
+ lineWidth /= scale;
+ }
+ if (fontSizeScale !== 1.0) {
+ ctx.scale(fontSizeScale, fontSizeScale);
+ lineWidth /= fontSizeScale;
+ }
+ ctx.lineWidth = lineWidth;
+ var x = 0, i;
+ for (i = 0; i < glyphsLength; ++i) {
+ var glyph = glyphs[i];
+ if (isNum(glyph)) {
+ x += spacingDir * glyph * fontSize / 1000;
+ continue;
+ }
+ var restoreNeeded = false;
+ var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing;
+ var character = glyph.fontChar;
+ var accent = glyph.accent;
+ var scaledX, scaledY, scaledAccentX, scaledAccentY;
+ var width = glyph.width;
+ if (vertical) {
+ var vmetric, vx, vy;
+ vmetric = glyph.vmetric || defaultVMetrics;
+ vx = glyph.vmetric ? vmetric[1] : width * 0.5;
+ vx = -vx * widthAdvanceScale;
+ vy = vmetric[2] * widthAdvanceScale;
+ width = vmetric ? -vmetric[0] : width;
+ scaledX = vx / fontSizeScale;
+ scaledY = (x + vy) / fontSizeScale;
+ } else {
+ scaledX = x / fontSizeScale;
+ scaledY = 0;
+ }
+ if (font.remeasure && width > 0) {
+ // Some standard fonts may not have the exact width: rescale per
+ // character if measured width is greater than expected glyph width
+ // and subpixel-aa is enabled, otherwise just center the glyph.
+ var measuredWidth = ctx.measureText(character).width * 1000 / fontSize * fontSizeScale;
+ if (width < measuredWidth && this.isFontSubpixelAAEnabled) {
+ var characterScaleX = width / measuredWidth;
+ restoreNeeded = true;
+ ctx.save();
+ ctx.scale(characterScaleX, 1);
+ scaledX /= characterScaleX;
+ } else if (width !== measuredWidth) {
+ scaledX += (width - measuredWidth) / 2000 * fontSize / fontSizeScale;
+ }
+ }
+ // Only attempt to draw the glyph if it is actually in the embedded font
+ // file or if there isn't a font file so the fallback font is shown.
+ if (glyph.isInFont || font.missingFile) {
+ if (simpleFillText && !accent) {
+ // common case
+ ctx.fillText(character, scaledX, scaledY);
+ } else {
+ 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);
+ }
+ }
+ }
+ var charWidth = width * widthAdvanceScale + spacing * fontDirection;
+ x += charWidth;
+ if (restoreNeeded) {
+ ctx.restore();
+ }
+ }
+ if (vertical) {
+ current.y -= x * textHScale;
+ } else {
+ current.x += x * textHScale;
+ }
+ ctx.restore();
+ },
+ showType3Text: function CanvasGraphics_showType3Text(glyphs) {
+ // Type3 fonts - each glyph is a "mini-PDF"
+ var ctx = this.ctx;
+ var current = this.current;
+ var font = current.font;
+ var fontSize = current.fontSize;
+ var fontDirection = current.fontDirection;
+ var spacingDir = font.vertical ? 1 : -1;
+ var charSpacing = current.charSpacing;
+ var wordSpacing = current.wordSpacing;
+ var textHScale = current.textHScale * fontDirection;
+ var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX;
+ var glyphsLength = glyphs.length;
+ var isTextInvisible = current.textRenderingMode === TextRenderingMode.INVISIBLE;
+ var i, glyph, width, spacingLength;
+ if (isTextInvisible || fontSize === 0) {
+ return;
+ }
+ this.cachedGetSinglePixelWidth = null;
+ ctx.save();
+ ctx.transform.apply(ctx, current.textMatrix);
+ ctx.translate(current.x, current.y);
+ ctx.scale(textHScale, fontDirection);
+ for (i = 0; i < glyphsLength; ++i) {
+ glyph = glyphs[i];
+ if (isNum(glyph)) {
+ spacingLength = spacingDir * glyph * fontSize / 1000;
+ this.ctx.translate(spacingLength, 0);
+ current.x += spacingLength * textHScale;
+ continue;
+ }
+ var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing;
+ var operatorList = font.charProcOperatorList[glyph.operatorListId];
+ if (!operatorList) {
+ warn('Type3 character \"' + glyph.operatorListId + '\" is not available');
+ continue;
+ }
+ this.processingType3 = glyph;
+ this.save();
+ ctx.scale(fontSize, fontSize);
+ ctx.transform.apply(ctx, fontMatrix);
+ this.executeOperatorList(operatorList);
+ this.restore();
+ var transformed = Util.applyTransform([
+ glyph.width,
+ 0
+ ], fontMatrix);
+ width = transformed[0] * fontSize + spacing;
+ ctx.translate(width, 0);
+ current.x += width * textHScale;
+ }
+ ctx.restore();
+ this.processingType3 = null;
+ },
+ // Type3 fonts
+ setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) {
+ },
+ 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.ctx.rect(llx, lly, urx - llx, ury - lly);
+ this.clip();
+ this.endPath();
+ },
+ // Color
+ getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR) {
+ var pattern;
+ if (IR[0] === 'TilingPattern') {
+ var color = IR[1];
+ var baseTransform = this.baseTransform || this.ctx.mozCurrentTransform.slice();
+ var self = this;
+ var canvasGraphicsFactory = {
+ createCanvasGraphics: function (ctx) {
+ return new CanvasGraphics(ctx, self.commonObjs, self.objs);
+ }
+ };
+ pattern = new TilingPattern(IR, color, this.ctx, canvasGraphicsFactory, baseTransform);
+ } else {
+ pattern = getShadingPatternFromIR(IR);
+ }
+ return pattern;
+ },
+ setStrokeColorN: function CanvasGraphics_setStrokeColorN()
+ /*...*/
+ {
+ this.current.strokeColor = this.getColorN_Pattern(arguments);
+ },
+ setFillColorN: function CanvasGraphics_setFillColorN()
+ /*...*/
+ {
+ this.current.fillColor = this.getColorN_Pattern(arguments);
+ this.current.patternFill = true;
+ },
+ setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) {
+ var color = Util.makeCssRgb(r, g, b);
+ this.ctx.strokeStyle = color;
+ this.current.strokeColor = color;
+ },
+ setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) {
+ var color = Util.makeCssRgb(r, g, b);
+ this.ctx.fillStyle = color;
+ this.current.fillColor = color;
+ this.current.patternFill = false;
+ },
+ 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 (isArray(matrix) && 6 === matrix.length) {
+ this.transform.apply(this, matrix);
+ }
+ this.baseTransform = this.ctx.mozCurrentTransform;
+ if (isArray(bbox) && 4 === bbox.length) {
+ var width = bbox[2] - bbox[0];
+ var height = bbox[3] - bbox[1];
+ this.ctx.rect(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 implementing:
+ // - When you encounter an transparency group, create a new canvas with
+ // the dimensions of the bbox
+ // - copy the content from the previous canvas to the new canvas
+ // - draw as usual
+ // - remove the backdrop alpha:
+ // alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha
+ // value of your transparency group and 'alphaBackdrop' the alpha of the
+ // backdrop
+ // - remove background color:
+ // colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew)
+ if (!group.isolated) {
+ info('TODO: Support non-isolated groups.');
+ }
+ // TODO knockout - supposedly possible with the clever use of compositing
+ // modes.
+ if (group.knockout) {
+ warn('Knockout groups not supported.');
+ }
+ var currentTransform = currentCtx.mozCurrentTransform;
+ if (group.matrix) {
+ currentCtx.transform.apply(currentCtx, group.matrix);
+ }
+ assert(group.bbox, 'Bounding box is required.');
+ // Based on the current transform figure out how big the bounding box
+ // will actually be.
+ var bounds = Util.getAxialAlignedBoundingBox(group.bbox, currentCtx.mozCurrentTransform);
+ // Clip the bounding box to the current canvas.
+ var canvasBounds = [
+ 0,
+ 0,
+ currentCtx.canvas.width,
+ currentCtx.canvas.height
+ ];
+ bounds = Util.intersect(bounds, canvasBounds) || [
+ 0,
+ 0,
+ 0,
+ 0
+ ];
+ // Use ceil in case we're between sizes so we don't create canvas that is
+ // too small and make the canvas at least 1x1 pixels.
+ var offsetX = Math.floor(bounds[0]);
+ var offsetY = Math.floor(bounds[1]);
+ var drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1);
+ var drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1);
+ var scaleX = 1, scaleY = 1;
+ if (drawnWidth > MAX_GROUP_SIZE) {
+ scaleX = drawnWidth / MAX_GROUP_SIZE;
+ drawnWidth = MAX_GROUP_SIZE;
+ }
+ if (drawnHeight > MAX_GROUP_SIZE) {
+ scaleY = drawnHeight / MAX_GROUP_SIZE;
+ drawnHeight = MAX_GROUP_SIZE;
+ }
+ var cacheId = 'groupAt' + this.groupLevel;
+ if (group.smask) {
+ // Using two cache entries is case if masks are used one after another.
+ cacheId += '_smask_' + this.smaskCounter++ % 2;
+ }
+ var scratchCanvas = this.cachedCanvases.getCanvas(cacheId, drawnWidth, drawnHeight, true);
+ var groupCtx = scratchCanvas.context;
+ // Since we created a new canvas that is just the size of the bounding box
+ // we have to translate the group ctx.
+ groupCtx.scale(1 / scaleX, 1 / scaleY);
+ groupCtx.translate(-offsetX, -offsetY);
+ groupCtx.transform.apply(groupCtx, currentTransform);
+ if (group.smask) {
+ // Saving state and cached mask to be used in setGState.
+ this.smaskStack.push({
+ canvas: scratchCanvas.canvas,
+ context: groupCtx,
+ offsetX: offsetX,
+ offsetY: offsetY,
+ scaleX: scaleX,
+ scaleY: scaleY,
+ subtype: group.smask.subtype,
+ backdrop: group.smask.backdrop,
+ transferMap: group.smask.transferMap || null,
+ startTransformInverse: null
+ });
+ } else
+ // used during suspend operation
+ {
+ // Setup the current ctx so when the group is popped we draw it at the
+ // right location.
+ currentCtx.setTransform(1, 0, 0, 1, 0, 0);
+ currentCtx.translate(offsetX, offsetY);
+ currentCtx.scale(scaleX, scaleY);
+ }
+ // The transparency group inherits all off the current graphics state
+ // except the blend mode, soft mask, and alpha constants.
+ copyCtxState(currentCtx, groupCtx);
+ this.ctx = groupCtx;
+ this.setGState([
+ [
+ 'BM',
+ 'Normal'
+ ],
+ [
+ 'ca',
+ 1
+ ],
+ [
+ 'CA',
+ 1
+ ]
+ ]);
+ this.groupStack.push(currentCtx);
+ this.groupLevel++;
+ // Reseting mask state, masks will be applied on restore of the group.
+ this.current.activeSMask = null;
+ },
+ 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 (this.ctx.imageSmoothingEnabled !== undefined) {
+ 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();
+ if (this.baseTransform) {
+ this.ctx.setTransform.apply(this.ctx, this.baseTransform);
+ }
+ },
+ endAnnotations: function CanvasGraphics_endAnnotations() {
+ this.restore();
+ },
+ beginAnnotation: function CanvasGraphics_beginAnnotation(rect, transform, matrix) {
+ this.save();
+ if (isArray(rect) && 4 === rect.length) {
+ var width = rect[2] - rect[0];
+ var height = rect[3] - rect[1];
+ this.ctx.rect(rect[0], rect[1], width, height);
+ this.clip();
+ this.endPath();
+ }
+ this.transform.apply(this, transform);
+ this.transform.apply(this, matrix);
+ },
+ endAnnotation: function CanvasGraphics_endAnnotation() {
+ this.restore();
+ },
+ paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) {
+ var domImage = this.objs.get(objId);
+ if (!domImage) {
+ warn('Dependent image isn\'t ready yet');
+ return;
+ }
+ this.save();
+ var ctx = this.ctx;
+ // scale the image to the unit square
+ ctx.scale(1 / w, -1 / h);
+ ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height, 0, -h, w, h);
+ if (this.imageLayer) {
+ var currentTransform = ctx.mozCurrentTransformInverse;
+ var position = this.getCanvasPosition(0, 0);
+ this.imageLayer.appendImage({
+ objId: objId,
+ left: position[0],
+ top: position[1],
+ width: w / currentTransform[0],
+ height: h / currentTransform[3]
+ });
+ }
+ this.restore();
+ },
+ paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) {
+ var ctx = this.ctx;
+ var width = img.width, height = img.height;
+ var fillColor = this.current.fillColor;
+ var isPatternFill = this.current.patternFill;
+ var glyph = this.processingType3;
+ if (COMPILE_TYPE3_GLYPHS && glyph && glyph.compiled === undefined) {
+ 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 = this.cachedCanvases.getCanvas('maskCanvas', width, height);
+ var maskCtx = maskCanvas.context;
+ maskCtx.save();
+ putBinaryImageMask(maskCtx, img);
+ maskCtx.globalCompositeOperation = 'source-in';
+ maskCtx.fillStyle = isPatternFill ? 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 fillColor = this.current.fillColor;
+ var isPatternFill = this.current.patternFill;
+ var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', width, height);
+ var maskCtx = maskCanvas.context;
+ maskCtx.save();
+ putBinaryImageMask(maskCtx, imgData);
+ maskCtx.globalCompositeOperation = 'source-in';
+ maskCtx.fillStyle = isPatternFill ? fillColor.getPattern(maskCtx, this) : fillColor;
+ maskCtx.fillRect(0, 0, width, height);
+ maskCtx.restore();
+ var ctx = this.ctx;
+ 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;
+ var fillColor = this.current.fillColor;
+ var isPatternFill = this.current.patternFill;
+ for (var i = 0, ii = images.length; i < ii; i++) {
+ var image = images[i];
+ var width = image.width, height = image.height;
+ var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', width, height);
+ var maskCtx = maskCanvas.context;
+ maskCtx.save();
+ putBinaryImageMask(maskCtx, image);
+ maskCtx.globalCompositeOperation = 'source-in';
+ maskCtx.fillStyle = isPatternFill ? fillColor.getPattern(maskCtx, this) : fillColor;
+ maskCtx.fillRect(0, 0, width, height);
+ maskCtx.restore();
+ ctx.save();
+ ctx.transform.apply(ctx, image.transform);
+ ctx.scale(1, -1);
+ ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, 0, -1, 1, 1);
+ ctx.restore();
+ }
+ },
+ paintImageXObject: function CanvasGraphics_paintImageXObject(objId) {
+ var imgData = this.objs.get(objId);
+ if (!imgData) {
+ warn('Dependent image isn\'t ready yet');
+ return;
+ }
+ this.paintInlineImageXObject(imgData);
+ },
+ paintImageXObjectRepeat: function CanvasGraphics_paintImageXObjectRepeat(objId, scaleX, scaleY, positions) {
+ var imgData = this.objs.get(objId);
+ if (!imgData) {
+ warn('Dependent image isn\'t ready yet');
+ return;
+ }
+ var width = imgData.width;
+ var height = imgData.height;
+ var map = [];
+ for (var i = 0, ii = positions.length; i < ii; i += 2) {
+ map.push({
+ transform: [
+ scaleX,
+ 0,
+ 0,
+ scaleY,
+ positions[i],
+ positions[i + 1]
+ ],
+ x: 0,
+ y: 0,
+ w: width,
+ h: height
+ });
+ }
+ this.paintInlineImageXObjectGroup(imgData, map);
+ },
+ paintInlineImageXObject: function CanvasGraphics_paintInlineImageXObject(imgData) {
+ var width = imgData.width;
+ var height = imgData.height;
+ var ctx = this.ctx;
+ this.save();
+ // scale the image to the unit square
+ ctx.scale(1 / width, -1 / height);
+ var currentTransform = ctx.mozCurrentTransformInverse;
+ var a = currentTransform[0], b = currentTransform[1];
+ var widthScale = Math.max(Math.sqrt(a * a + b * b), 1);
+ var c = currentTransform[2], d = currentTransform[3];
+ var heightScale = Math.max(Math.sqrt(c * c + d * d), 1);
+ var imgToPaint, tmpCanvas;
+ // instanceof HTMLElement does not work in jsdom node.js module
+ if (imgData instanceof HTMLElement || !imgData.data) {
+ imgToPaint = imgData;
+ } else {
+ tmpCanvas = this.cachedCanvases.getCanvas('inlineImage', width, height);
+ var tmpCtx = tmpCanvas.context;
+ putBinaryImageData(tmpCtx, imgData);
+ imgToPaint = tmpCanvas.canvas;
+ }
+ var paintWidth = width, paintHeight = height;
+ var tmpCanvasId = 'prescale1';
+ // Vertial or horizontal scaling shall not be more than 2 to not loose the
+ // pixels during drawImage operation, painting on the temporary canvas(es)
+ // that are twice smaller in size
+ while (widthScale > 2 && paintWidth > 1 || heightScale > 2 && paintHeight > 1) {
+ var newWidth = paintWidth, newHeight = paintHeight;
+ if (widthScale > 2 && paintWidth > 1) {
+ newWidth = Math.ceil(paintWidth / 2);
+ widthScale /= paintWidth / newWidth;
+ }
+ if (heightScale > 2 && paintHeight > 1) {
+ newHeight = Math.ceil(paintHeight / 2);
+ heightScale /= paintHeight / newHeight;
+ }
+ tmpCanvas = this.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 = this.cachedCanvases.getCanvas('inlineImage', w, h);
+ var tmpCtx = tmpCanvas.context;
+ putBinaryImageData(tmpCtx, imgData);
+ for (var i = 0, ii = map.length; i < ii; i++) {
+ var entry = map[i];
+ ctx.save();
+ ctx.transform.apply(ctx, entry.transform);
+ ctx.scale(1, -1);
+ ctx.drawImage(tmpCanvas.canvas, entry.x, entry.y, entry.w, entry.h, 0, -1, 1, 1);
+ if (this.imageLayer) {
+ var position = this.getCanvasPosition(entry.x, entry.y);
+ this.imageLayer.appendImage({
+ imgData: imgData,
+ left: position[0],
+ top: position[1],
+ width: w,
+ height: h
+ });
+ }
+ ctx.restore();
+ }
+ },
+ paintSolidColorImageMask: function CanvasGraphics_paintSolidColorImageMask() {
+ this.ctx.fillRect(0, 0, 1, 1);
+ },
+ paintXObject: function CanvasGraphics_paintXObject() {
+ warn('Unsupported \'paintXObject\' command.');
+ },
+ // Marked content
+ markPoint: function CanvasGraphics_markPoint(tag) {
+ },
+ markPointProps: function CanvasGraphics_markPointProps(tag, properties) {
+ },
+ beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) {
+ },
+ beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps(tag, properties) {
+ },
+ endMarkedContent: function CanvasGraphics_endMarkedContent() {
+ },
+ // Compatibility
+ beginCompat: function CanvasGraphics_beginCompat() {
+ },
+ endCompat: function CanvasGraphics_endCompat() {
+ },
+ // Helper functions
+ consumePath: function CanvasGraphics_consumePath() {
+ var ctx = this.ctx;
+ if (this.pendingClip) {
+ if (this.pendingClip === EO_CLIP) {
+ if (ctx.mozFillRule !== undefined) {
+ ctx.mozFillRule = 'evenodd';
+ ctx.clip();
+ ctx.mozFillRule = 'nonzero';
+ } else {
+ ctx.clip('evenodd');
+ }
+ } else {
+ ctx.clip();
+ }
+ this.pendingClip = null;
+ }
+ ctx.beginPath();
+ },
+ getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) {
+ if (this.cachedGetSinglePixelWidth === null) {
+ // NOTE: The `save` and `restore` commands used below is a workaround
+ // that is necessary in order to prevent `mozCurrentTransformInverse`
+ // from intermittently returning incorrect values in Firefox, see:
+ // https://github.com/mozilla/pdf.js/issues/7188.
+ this.ctx.save();
+ var inverse = this.ctx.mozCurrentTransformInverse;
+ this.ctx.restore();
+ // max of the current horizontal and vertical scale
+ this.cachedGetSinglePixelWidth = Math.sqrt(Math.max(inverse[0] * inverse[0] + inverse[1] * inverse[1], inverse[2] * inverse[2] + inverse[3] * inverse[3]));
+ }
+ return this.cachedGetSinglePixelWidth;
+ },
+ 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;
+ }();
+ exports.CanvasGraphics = CanvasGraphics;
+ exports.createScratchCanvas = createScratchCanvas;
+ }));
+ (function (root, factory) {
+ factory(root.pdfjsDisplayAPI = {}, root.pdfjsSharedUtil, root.pdfjsDisplayFontLoader, root.pdfjsDisplayCanvas, root.pdfjsDisplayMetadata, root.pdfjsDisplayDOMUtils);
+ }(this, function (exports, sharedUtil, displayFontLoader, displayCanvas, displayMetadata, displayDOMUtils, amdRequire) {
+ var InvalidPDFException = sharedUtil.InvalidPDFException;
+ var MessageHandler = sharedUtil.MessageHandler;
+ var MissingPDFException = sharedUtil.MissingPDFException;
+ var PageViewport = sharedUtil.PageViewport;
+ var PasswordResponses = sharedUtil.PasswordResponses;
+ var PasswordException = sharedUtil.PasswordException;
+ var StatTimer = sharedUtil.StatTimer;
+ var UnexpectedResponseException = sharedUtil.UnexpectedResponseException;
+ var UnknownErrorException = sharedUtil.UnknownErrorException;
+ var Util = sharedUtil.Util;
+ var createPromiseCapability = sharedUtil.createPromiseCapability;
+ var error = sharedUtil.error;
+ var deprecated = sharedUtil.deprecated;
+ var getVerbosityLevel = sharedUtil.getVerbosityLevel;
+ var info = sharedUtil.info;
+ var isInt = sharedUtil.isInt;
+ var isArray = sharedUtil.isArray;
+ var isArrayBuffer = sharedUtil.isArrayBuffer;
+ var isSameOrigin = sharedUtil.isSameOrigin;
+ var loadJpegStream = sharedUtil.loadJpegStream;
+ var stringToBytes = sharedUtil.stringToBytes;
+ var globalScope = sharedUtil.globalScope;
+ var warn = sharedUtil.warn;
+ var FontFaceObject = displayFontLoader.FontFaceObject;
+ var FontLoader = displayFontLoader.FontLoader;
+ var CanvasGraphics = displayCanvas.CanvasGraphics;
+ var createScratchCanvas = displayCanvas.createScratchCanvas;
+ var Metadata = displayMetadata.Metadata;
+ var getDefaultSetting = displayDOMUtils.getDefaultSetting;
+ var DEFAULT_RANGE_CHUNK_SIZE = 65536;
+ // 2^16 = 65536
+ var isWorkerDisabled = false;
+ var workerSrc;
+ var isPostMessageTransfersDisabled = false;
+ var fakeWorkerFilesLoader = null;
+ var useRequireEnsure = false;
+ /**
+ * Document initialization / loading parameters object.
+ *
+ * @typedef {Object} DocumentInitParameters
+ * @property {string} url - The URL of the PDF.
+ * @property {TypedArray|Array|string} data - Binary PDF data. Use typed arrays
+ * (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded,
+ * use atob() to convert it to a binary string first.
+ * @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.
+ * @property {number} length - The PDF file length. It's used for progress
+ * reports and range requests operations.
+ * @property {PDFDataRangeTransport} range
+ * @property {number} rangeChunkSize - Optional parameter to specify
+ * maximum number of bytes fetched per range request. The default value is
+ * 2^16 = 65536.
+ * @property {PDFWorker} worker - The worker that will be used for the loading
+ * and parsing of the PDF data.
+ * @property {string} docBaseUrl - (optional) The base URL of the document,
+ * used when attempting to recover valid absolute URLs for annotations, and
+ * outline items, that (incorrectly) only specify relative URLs.
+ */
+ /**
+ * @typedef {Object} PDFDocumentStats
+ * @property {Array} streamTypes - Used stream types in the document (an item
+ * is set to true if specific stream ID was used in the document).
+ * @property {Array} fontTypes - Used font type in the document (an item is set
+ * to true if specific font ID was used in the document).
+ */
+ /**
+ * 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|PDFDataRangeTransport} src
+ * Can be a url to where a PDF is located, a typed array (Uint8Array)
+ * already populated with data or parameter object.
+ *
+ * @param {PDFDataRangeTransport} pdfDataRangeTransport (deprecated) It is used
+ * if you want to manually serve range requests for data in the PDF.
+ *
+ * @param {function} passwordCallback (deprecated) 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}).
+ *
+ * @param {function} progressCallback (deprecated) It is used to be able to
+ * monitor the loading progress of the PDF file (necessary to implement e.g.
+ * a loading bar). The callback receives an {Object} with the properties:
+ * {number} loaded and {number} total.
+ *
+ * @return {PDFDocumentLoadingTask}
+ */
+ function getDocument(src, pdfDataRangeTransport, passwordCallback, progressCallback) {
+ var task = new PDFDocumentLoadingTask();
+ // Support of the obsolete arguments (for compatibility with API v1.0)
+ if (arguments.length > 1) {
+ deprecated('getDocument is called with pdfDataRangeTransport, ' + 'passwordCallback or progressCallback argument');
+ }
+ if (pdfDataRangeTransport) {
+ if (!(pdfDataRangeTransport instanceof PDFDataRangeTransport)) {
+ // Not a PDFDataRangeTransport instance, trying to add missing properties.
+ pdfDataRangeTransport = Object.create(pdfDataRangeTransport);
+ pdfDataRangeTransport.length = src.length;
+ pdfDataRangeTransport.initialData = src.initialData;
+ if (!pdfDataRangeTransport.abort) {
+ pdfDataRangeTransport.abort = function () {
+ };
+ }
+ }
+ src = Object.create(src);
+ src.range = pdfDataRangeTransport;
+ }
+ task.onPassword = passwordCallback || null;
+ task.onProgress = progressCallback || null;
+ var source;
+ if (typeof src === 'string') {
+ source = { url: src };
+ } else if (isArrayBuffer(src)) {
+ source = { data: src };
+ } else if (src instanceof PDFDataRangeTransport) {
+ source = { range: src };
+ } else {
+ if (typeof src !== 'object') {
+ error('Invalid parameter in getDocument, need either Uint8Array, ' + 'string or a parameter object');
+ }
+ if (!src.url && !src.data && !src.range) {
+ error('Invalid parameter object: need either .data, .range or .url');
+ }
+ source = src;
+ }
+ var params = {};
+ var rangeTransport = null;
+ var worker = null;
+ for (var key in source) {
+ if (key === 'url' && typeof window !== 'undefined') {
+ // The full path is required in the 'url' field.
+ params[key] = new URL(source[key], window.location).href;
+ continue;
+ } else if (key === 'range') {
+ rangeTransport = source[key];
+ continue;
+ } else if (key === 'worker') {
+ worker = source[key];
+ continue;
+ } else if (key === 'data' && !(source[key] instanceof Uint8Array)) {
+ // Converting string or array-like data to Uint8Array.
+ var pdfBytes = source[key];
+ if (typeof pdfBytes === 'string') {
+ params[key] = stringToBytes(pdfBytes);
+ } else if (typeof pdfBytes === 'object' && pdfBytes !== null && !isNaN(pdfBytes.length)) {
+ params[key] = new Uint8Array(pdfBytes);
+ } else if (isArrayBuffer(pdfBytes)) {
+ params[key] = new Uint8Array(pdfBytes);
+ } else {
+ error('Invalid PDF binary data: either typed array, string or ' + 'array-like object is expected in the data property.');
+ }
+ continue;
+ }
+ params[key] = source[key];
+ }
+ params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE;
+ if (!worker) {
+ // Worker was not provided -- creating and owning our own.
+ worker = new PDFWorker();
+ task._worker = worker;
+ }
+ var docId = task.docId;
+ worker.promise.then(function () {
+ if (task.destroyed) {
+ throw new Error('Loading aborted');
+ }
+ return _fetchDocument(worker, params, rangeTransport, docId).then(function (workerId) {
+ if (task.destroyed) {
+ throw new Error('Loading aborted');
+ }
+ var messageHandler = new MessageHandler(docId, workerId, worker.port);
+ var transport = new WorkerTransport(messageHandler, task, rangeTransport);
+ task._transport = transport;
+ messageHandler.send('Ready', null);
+ });
+ }).catch(task._capability.reject);
+ return task;
+ }
+ /**
+ * Starts fetching of specified PDF document/data.
+ * @param {PDFWorker} worker
+ * @param {Object} source
+ * @param {PDFDataRangeTransport} pdfDataRangeTransport
+ * @param {string} docId Unique document id, used as MessageHandler id.
+ * @returns {Promise} The promise, which is resolved when worker id of
+ * MessageHandler is known.
+ * @private
+ */
+ function _fetchDocument(worker, source, pdfDataRangeTransport, docId) {
+ if (worker.destroyed) {
+ return Promise.reject(new Error('Worker was destroyed'));
+ }
+ source.disableAutoFetch = getDefaultSetting('disableAutoFetch');
+ source.disableStream = getDefaultSetting('disableStream');
+ source.chunkedViewerLoading = !!pdfDataRangeTransport;
+ if (pdfDataRangeTransport) {
+ source.length = pdfDataRangeTransport.length;
+ source.initialData = pdfDataRangeTransport.initialData;
+ }
+ return worker.messageHandler.sendWithPromise('GetDocRequest', {
+ docId: docId,
+ source: source,
+ disableRange: getDefaultSetting('disableRange'),
+ maxImageSize: getDefaultSetting('maxImageSize'),
+ cMapUrl: getDefaultSetting('cMapUrl'),
+ cMapPacked: getDefaultSetting('cMapPacked'),
+ disableFontFace: getDefaultSetting('disableFontFace'),
+ disableCreateObjectURL: getDefaultSetting('disableCreateObjectURL'),
+ postMessageTransfers: getDefaultSetting('postMessageTransfers') && !isPostMessageTransfersDisabled,
+ docBaseUrl: source.docBaseUrl
+ }).then(function (workerId) {
+ if (worker.destroyed) {
+ throw new Error('Worker was destroyed');
+ }
+ return workerId;
+ });
+ }
+ /**
+ * PDF document loading operation.
+ * @class
+ * @alias PDFDocumentLoadingTask
+ */
+ var PDFDocumentLoadingTask = function PDFDocumentLoadingTaskClosure() {
+ var nextDocumentId = 0;
+ /** @constructs PDFDocumentLoadingTask */
+ function PDFDocumentLoadingTask() {
+ this._capability = createPromiseCapability();
+ this._transport = null;
+ this._worker = null;
+ /**
+ * Unique document loading task id -- used in MessageHandlers.
+ * @type {string}
+ */
+ this.docId = 'd' + nextDocumentId++;
+ /**
+ * Shows if loading task is destroyed.
+ * @type {boolean}
+ */
+ this.destroyed = false;
+ /**
+ * Callback 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}).
+ */
+ this.onPassword = null;
+ /**
+ * Callback to be able to monitor the loading progress of the PDF file
+ * (necessary to implement e.g. a loading bar). The callback receives
+ * an {Object} with the properties: {number} loaded and {number} total.
+ */
+ this.onProgress = null;
+ /**
+ * Callback to when unsupported feature is used. The callback receives
+ * an {UNSUPPORTED_FEATURES} argument.
+ */
+ this.onUnsupportedFeature = null;
+ }
+ PDFDocumentLoadingTask.prototype = /** @lends PDFDocumentLoadingTask.prototype */
+ {
+ /**
+ * @return {Promise}
+ */
+ get promise() {
+ return this._capability.promise;
+ },
+ /**
+ * Aborts all network requests and destroys worker.
+ * @return {Promise} A promise that is resolved after destruction activity
+ * is completed.
+ */
+ destroy: function () {
+ this.destroyed = true;
+ var transportDestroyed = !this._transport ? Promise.resolve() : this._transport.destroy();
+ return transportDestroyed.then(function () {
+ this._transport = null;
+ if (this._worker) {
+ this._worker.destroy();
+ this._worker = null;
+ }
+ }.bind(this));
+ },
+ /**
+ * Registers callbacks to indicate the document loading completion.
+ *
+ * @param {function} onFulfilled The callback for the loading completion.
+ * @param {function} onRejected The callback for the loading failure.
+ * @return {Promise} A promise that is resolved after the onFulfilled or
+ * onRejected callback.
+ */
+ then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) {
+ return this.promise.then.apply(this.promise, arguments);
+ }
+ };
+ return PDFDocumentLoadingTask;
+ }();
+ /**
+ * Abstract class to support range requests file loading.
+ * @class
+ * @alias PDFDataRangeTransport
+ * @param {number} length
+ * @param {Uint8Array} initialData
+ */
+ var PDFDataRangeTransport = function pdfDataRangeTransportClosure() {
+ function PDFDataRangeTransport(length, initialData) {
+ this.length = length;
+ this.initialData = initialData;
+ this._rangeListeners = [];
+ this._progressListeners = [];
+ this._progressiveReadListeners = [];
+ this._readyCapability = createPromiseCapability();
+ }
+ PDFDataRangeTransport.prototype = /** @lends PDFDataRangeTransport.prototype */
+ {
+ addRangeListener: function PDFDataRangeTransport_addRangeListener(listener) {
+ this._rangeListeners.push(listener);
+ },
+ addProgressListener: function PDFDataRangeTransport_addProgressListener(listener) {
+ this._progressListeners.push(listener);
+ },
+ addProgressiveReadListener: function PDFDataRangeTransport_addProgressiveReadListener(listener) {
+ this._progressiveReadListeners.push(listener);
+ },
+ onDataRange: function PDFDataRangeTransport_onDataRange(begin, chunk) {
+ var listeners = this._rangeListeners;
+ for (var i = 0, n = listeners.length; i < n; ++i) {
+ listeners[i](begin, chunk);
+ }
+ },
+ onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) {
+ this._readyCapability.promise.then(function () {
+ var listeners = this._progressListeners;
+ for (var i = 0, n = listeners.length; i < n; ++i) {
+ listeners[i](loaded);
+ }
+ }.bind(this));
+ },
+ onDataProgressiveRead: function PDFDataRangeTransport_onDataProgress(chunk) {
+ this._readyCapability.promise.then(function () {
+ var listeners = this._progressiveReadListeners;
+ for (var i = 0, n = listeners.length; i < n; ++i) {
+ listeners[i](chunk);
+ }
+ }.bind(this));
+ },
+ transportReady: function PDFDataRangeTransport_transportReady() {
+ this._readyCapability.resolve();
+ },
+ requestDataRange: function PDFDataRangeTransport_requestDataRange(begin, end) {
+ throw new Error('Abstract method PDFDataRangeTransport.requestDataRange');
+ },
+ abort: function PDFDataRangeTransport_abort() {
+ }
+ };
+ return PDFDataRangeTransport;
+ }();
+ /**
+ * Proxy to a PDFDocument in the worker thread. Also, contains commonly used
+ * properties that can be read synchronously.
+ * @class
+ * @alias PDFDocumentProxy
+ */
+ var PDFDocumentProxy = function PDFDocumentProxyClosure() {
+ function PDFDocumentProxy(pdfInfo, transport, loadingTask) {
+ this.pdfInfo = pdfInfo;
+ this.transport = transport;
+ this.loadingTask = loadingTask;
+ }
+ 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.
+ *
+ * This can be slow for large documents: use getDestination instead
+ */
+ getDestinations: function PDFDocumentProxy_getDestinations() {
+ return this.transport.getDestinations();
+ },
+ /**
+ * @param {string} id The named destination to get.
+ * @return {Promise} A promise that is resolved with all information
+ * of the given named destination.
+ */
+ getDestination: function PDFDocumentProxy_getDestination(id) {
+ return this.transport.getDestination(id);
+ },
+ /**
+ * @return {Promise} A promise that is resolved with:
+ * an Array containing the pageLabels that correspond to the pageIndexes,
+ * or `null` when no pageLabels are present in the PDF file.
+ */
+ getPageLabels: function PDFDocumentProxy_getPageLabels() {
+ return this.transport.getPageLabels();
+ },
+ /**
+ * @return {Promise} A promise that is resolved with a lookup table for
+ * mapping named attachments to their content.
+ */
+ getAttachments: function PDFDocumentProxy_getAttachments() {
+ return this.transport.getAttachments();
+ },
+ /**
+ * @return {Promise} A promise that is resolved with an array of all the
+ * JavaScript strings in the name tree.
+ */
+ getJavaScript: function PDFDocumentProxy_getJavaScript() {
+ return this.transport.getJavaScript();
+ },
+ /**
+ * @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 Uint8Array,
+ * dest: dest obj,
+ * url: string,
+ * items: array of more items like this
+ * },
+ * ...
+ * ].
+ */
+ getOutline: function PDFDocumentProxy_getOutline() {
+ return this.transport.getOutline();
+ },
+ /**
+ * @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() {
+ return this.transport.getMetadata();
+ },
+ /**
+ * @return {Promise} A promise that is resolved with a TypedArray that has
+ * the raw data from the PDF.
+ */
+ getData: function PDFDocumentProxy_getData() {
+ return this.transport.getData();
+ },
+ /**
+ * @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.downloadInfoCapability.promise;
+ },
+ /**
+ * @return {Promise} A promise this is resolved with current stats about
+ * document structures (see {@link PDFDocumentStats}).
+ */
+ getStats: function PDFDocumentProxy_getStats() {
+ return this.transport.getStats();
+ },
+ /**
+ * 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() {
+ return this.loadingTask.destroy();
+ }
+ };
+ return PDFDocumentProxy;
+ }();
+ /**
+ * Page getTextContent parameters.
+ *
+ * @typedef {Object} getTextContentParameters
+ * @property {boolean} normalizeWhitespace - replaces all occurrences of
+ * whitespace with standard spaces (0x20). The default value is `false`.
+ * @property {boolean} disableCombineTextItems - do not attempt to combine
+ * same line {@link TextItem}'s. The default value is `false`.
+ */
+ /**
+ * Page text content.
+ *
+ * @typedef {Object} TextContent
+ * @property {array} items - array of {@link TextItem}
+ * @property {Object} styles - {@link TextStyles} objects, indexed by font name.
+ */
+ /**
+ * Page text content part.
+ *
+ * @typedef {Object} TextItem
+ * @property {string} str - text content.
+ * @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'.
+ * @property {array} transform - transformation matrix.
+ * @property {number} width - width in device space.
+ * @property {number} height - height in device space.
+ * @property {string} fontName - font name used by pdf.js for converted font.
+ */
+ /**
+ * Text style.
+ *
+ * @typedef {Object} TextStyle
+ * @property {number} ascent - font ascent.
+ * @property {number} descent - font descent.
+ * @property {boolean} vertical - text is in vertical mode.
+ * @property {string} fontFamily - possible font family
+ */
+ /**
+ * Page annotation parameters.
+ *
+ * @typedef {Object} GetAnnotationsParameters
+ * @property {string} intent - Determines the annotations that will be fetched,
+ * can be either 'display' (viewable annotations) or 'print'
+ * (printable annotations).
+ * If the parameter is omitted, all annotations are fetched.
+ */
+ /**
+ * Page render parameters.
+ *
+ * @typedef {Object} RenderParameters
+ * @property {Object} canvasContext - A 2D context of a DOM Canvas object.
+ * @property {PageViewport} viewport - Rendering viewport obtained by
+ * calling of PDFPage.getViewport method.
+ * @property {string} intent - Rendering intent, can be 'display' or 'print'
+ * (default value is 'display').
+ * @property {boolean} renderInteractiveForms - (optional) Whether or not
+ * interactive form elements are rendered in the display
+ * layer. If so, we do not render them on canvas as well.
+ * @property {Array} transform - (optional) Additional transform, applied
+ * just before viewport transform.
+ * @property {Object} imageLayer - (optional) An object that has beginLayout,
+ * endLayout and appendImage functions.
+ * @property {function} continueCallback - (deprecated) 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.
+ */
+ /**
+ * PDF page operator list.
+ *
+ * @typedef {Object} PDFOperatorList
+ * @property {Array} fnArray - Array containing the operator functions.
+ * @property {Array} argsArray - Array containing the arguments of the
+ * functions.
+ */
+ /**
+ * Proxy to a PDFPage in the worker thread.
+ * @class
+ * @alias PDFPageProxy
+ */
+ var PDFPageProxy = function PDFPageProxyClosure() {
+ function PDFPageProxy(pageIndex, pageInfo, transport) {
+ this.pageIndex = pageIndex;
+ this.pageInfo = pageInfo;
+ this.transport = transport;
+ this.stats = new StatTimer();
+ this.stats.enabled = getDefaultSetting('enableStats');
+ this.commonObjs = transport.commonObjs;
+ this.objs = new PDFObjects();
+ this.cleanupAfterRender = false;
+ this.pendingCleanup = false;
+ this.intentStates = Object.create(null);
+ this.destroyed = false;
+ }
+ PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */
+ {
+ /**
+ * @return {number} Page number of the page. First page is 1.
+ */
+ get pageNumber() {
+ return this.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 PageViewport(this.view, scale, rotate, 0, 0);
+ },
+ /**
+ * @param {GetAnnotationsParameters} params - Annotation parameters.
+ * @return {Promise} A promise that is resolved with an {Array} of the
+ * annotation objects.
+ */
+ getAnnotations: function PDFPageProxy_getAnnotations(params) {
+ var intent = params && params.intent || null;
+ if (!this.annotationsPromise || this.annotationsIntent !== intent) {
+ this.annotationsPromise = this.transport.getAnnotations(this.pageIndex, intent);
+ this.annotationsIntent = intent;
+ }
+ return this.annotationsPromise;
+ },
+ /**
+ * Begins the process of rendering a page to the desired context.
+ * @param {RenderParameters} params Page render parameters.
+ * @return {RenderTask} An object that contains the promise, which
+ * is resolved when the page finishes rendering.
+ */
+ render: function PDFPageProxy_render(params) {
+ var stats = this.stats;
+ stats.time('Overall');
+ // If there was a pending destroy cancel it so no cleanup happens during
+ // this call to render.
+ this.pendingCleanup = false;
+ var renderingIntent = params.intent === 'print' ? 'print' : 'display';
+ var renderInteractiveForms = params.renderInteractiveForms === true ? true : /* Default */
+ false;
+ if (!this.intentStates[renderingIntent]) {
+ this.intentStates[renderingIntent] = Object.create(null);
+ }
+ var intentState = this.intentStates[renderingIntent];
+ // If there's no displayReadyCapability yet, then the operatorList
+ // was never requested before. Make the request and create the promise.
+ if (!intentState.displayReadyCapability) {
+ intentState.receivingOperatorList = true;
+ intentState.displayReadyCapability = createPromiseCapability();
+ intentState.operatorList = {
+ fnArray: [],
+ argsArray: [],
+ lastChunk: false
+ };
+ this.stats.time('Page Request');
+ this.transport.messageHandler.send('RenderPageRequest', {
+ pageIndex: this.pageNumber - 1,
+ intent: renderingIntent,
+ renderInteractiveForms: renderInteractiveForms
+ });
+ }
+ var internalRenderTask = new InternalRenderTask(complete, params, this.objs, this.commonObjs, intentState.operatorList, this.pageNumber);
+ internalRenderTask.useRequestAnimationFrame = renderingIntent !== 'print';
+ if (!intentState.renderTasks) {
+ intentState.renderTasks = [];
+ }
+ intentState.renderTasks.push(internalRenderTask);
+ var renderTask = internalRenderTask.task;
+ // Obsolete parameter support
+ if (params.continueCallback) {
+ deprecated('render is used with continueCallback parameter');
+ renderTask.onContinue = params.continueCallback;
+ }
+ var self = this;
+ intentState.displayReadyCapability.promise.then(function pageDisplayReadyPromise(transparency) {
+ if (self.pendingCleanup) {
+ complete();
+ return;
+ }
+ stats.time('Rendering');
+ internalRenderTask.initializeGraphics(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.pendingCleanup = true;
+ }
+ self._tryCleanup();
+ if (error) {
+ internalRenderTask.capability.reject(error);
+ } else {
+ internalRenderTask.capability.resolve();
+ }
+ stats.timeEnd('Rendering');
+ stats.timeEnd('Overall');
+ }
+ return renderTask;
+ },
+ /**
+ * @return {Promise} A promise resolved with an {@link PDFOperatorList}
+ * object that represents page's operator list.
+ */
+ getOperatorList: function PDFPageProxy_getOperatorList() {
+ function operatorListChanged() {
+ if (intentState.operatorList.lastChunk) {
+ intentState.opListReadCapability.resolve(intentState.operatorList);
+ var i = intentState.renderTasks.indexOf(opListTask);
+ if (i >= 0) {
+ intentState.renderTasks.splice(i, 1);
+ }
+ }
+ }
+ var renderingIntent = 'oplist';
+ if (!this.intentStates[renderingIntent]) {
+ this.intentStates[renderingIntent] = Object.create(null);
+ }
+ var intentState = this.intentStates[renderingIntent];
+ var opListTask;
+ if (!intentState.opListReadCapability) {
+ opListTask = {};
+ opListTask.operatorListChanged = operatorListChanged;
+ intentState.receivingOperatorList = true;
+ intentState.opListReadCapability = createPromiseCapability();
+ intentState.renderTasks = [];
+ intentState.renderTasks.push(opListTask);
+ intentState.operatorList = {
+ fnArray: [],
+ argsArray: [],
+ lastChunk: false
+ };
+ this.transport.messageHandler.send('RenderPageRequest', {
+ pageIndex: this.pageIndex,
+ intent: renderingIntent
+ });
+ }
+ return intentState.opListReadCapability.promise;
+ },
+ /**
+ * @param {getTextContentParameters} params - getTextContent parameters.
+ * @return {Promise} That is resolved a {@link TextContent}
+ * object that represent the page text content.
+ */
+ getTextContent: function PDFPageProxy_getTextContent(params) {
+ return this.transport.messageHandler.sendWithPromise('GetTextContent', {
+ pageIndex: this.pageNumber - 1,
+ normalizeWhitespace: params && params.normalizeWhitespace === true ? true : /* Default */
+ false,
+ combineTextItems: params && params.disableCombineTextItems === true ? false : /* Default */
+ true
+ });
+ },
+ /**
+ * Destroys page object.
+ */
+ _destroy: function PDFPageProxy_destroy() {
+ this.destroyed = true;
+ this.transport.pageCache[this.pageIndex] = null;
+ var waitOn = [];
+ Object.keys(this.intentStates).forEach(function (intent) {
+ if (intent === 'oplist') {
+ // Avoid errors below, since the renderTasks are just stubs.
+ return;
+ }
+ var intentState = this.intentStates[intent];
+ intentState.renderTasks.forEach(function (renderTask) {
+ var renderCompleted = renderTask.capability.promise.catch(function () {
+ });
+ // ignoring failures
+ waitOn.push(renderCompleted);
+ renderTask.cancel();
+ });
+ }, this);
+ this.objs.clear();
+ this.annotationsPromise = null;
+ this.pendingCleanup = false;
+ return Promise.all(waitOn);
+ },
+ /**
+ * Cleans up resources allocated by the page. (deprecated)
+ */
+ destroy: function () {
+ deprecated('page destroy method, use cleanup() instead');
+ this.cleanup();
+ },
+ /**
+ * Cleans up resources allocated by the page.
+ */
+ cleanup: function PDFPageProxy_cleanup() {
+ this.pendingCleanup = true;
+ this._tryCleanup();
+ },
+ /**
+ * For internal use only. Attempts to clean up if rendering is in a state
+ * where that's possible.
+ * @ignore
+ */
+ _tryCleanup: function PDFPageProxy_tryCleanup() {
+ if (!this.pendingCleanup || 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.annotationsPromise = null;
+ this.pendingCleanup = false;
+ },
+ /**
+ * For internal use only.
+ * @ignore
+ */
+ _startRenderPage: function PDFPageProxy_startRenderPage(transparency, intent) {
+ var intentState = this.intentStates[intent];
+ // TODO Refactor RenderPageRequest to separate rendering
+ // and operator list logic
+ if (intentState.displayReadyCapability) {
+ intentState.displayReadyCapability.resolve(transparency);
+ }
+ },
+ /**
+ * For internal use only.
+ * @ignore
+ */
+ _renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk, intent) {
+ var intentState = this.intentStates[intent];
+ var i, ii;
+ // Add the new chunk to the current operator list.
+ for (i = 0, ii = operatorListChunk.length; i < ii; i++) {
+ intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]);
+ intentState.operatorList.argsArray.push(operatorListChunk.argsArray[i]);
+ }
+ intentState.operatorList.lastChunk = operatorListChunk.lastChunk;
+ // Notify all the rendering tasks there are more operators to be consumed.
+ for (i = 0; i < intentState.renderTasks.length; i++) {
+ intentState.renderTasks[i].operatorListChanged();
+ }
+ if (operatorListChunk.lastChunk) {
+ intentState.receivingOperatorList = false;
+ this._tryCleanup();
+ }
+ }
+ };
+ return PDFPageProxy;
+ }();
+ /**
+ * PDF.js web worker abstraction, it controls instantiation of PDF documents and
+ * WorkerTransport for them. If creation of a web worker is not possible,
+ * a "fake" worker will be used instead.
+ * @class
+ */
+ var PDFWorker = function PDFWorkerClosure() {
+ var nextFakeWorkerId = 0;
+ function getWorkerSrc() {
+ if (typeof workerSrc !== 'undefined') {
+ return workerSrc;
+ }
+ if (getDefaultSetting('workerSrc')) {
+ return getDefaultSetting('workerSrc');
+ }
+ error('No PDFJS.workerSrc specified');
+ }
+ var fakeWorkerFilesLoadedCapability;
+ // Loads worker code into main thread.
+ function setupFakeWorkerGlobal() {
+ var WorkerMessageHandler;
+ if (fakeWorkerFilesLoadedCapability) {
+ return fakeWorkerFilesLoadedCapability.promise;
+ }
+ fakeWorkerFilesLoadedCapability = createPromiseCapability();
+ var loader = fakeWorkerFilesLoader || function (callback) {
+ Util.loadScript(getWorkerSrc(), function () {
+ callback(window.pdfjsDistBuildPdfWorker.WorkerMessageHandler);
+ });
+ };
+ loader(fakeWorkerFilesLoadedCapability.resolve);
+ return fakeWorkerFilesLoadedCapability.promise;
+ }
+ function FakeWorkerPort(defer) {
+ this._listeners = [];
+ this._defer = defer;
+ this._deferred = Promise.resolve(undefined);
+ }
+ FakeWorkerPort.prototype = {
+ postMessage: function (obj, transfers) {
+ function cloneValue(value) {
+ // Trying to perform a structured clone close to the spec, including
+ // transfers.
+ if (typeof value !== 'object' || value === null) {
+ return value;
+ }
+ if (cloned.has(value)) {
+ // already cloned the object
+ return cloned.get(value);
+ }
+ var result;
+ var buffer;
+ if ((buffer = value.buffer) && isArrayBuffer(buffer)) {
+ // We found object with ArrayBuffer (typed array).
+ var transferable = transfers && transfers.indexOf(buffer) >= 0;
+ if (value === buffer) {
+ // Special case when we are faking typed arrays in compatibility.js.
+ result = value;
+ } else if (transferable) {
+ result = new value.constructor(buffer, value.byteOffset, value.byteLength);
+ } else {
+ result = new value.constructor(value);
+ }
+ cloned.set(value, result);
+ return result;
+ }
+ result = isArray(value) ? [] : {};
+ cloned.set(value, result);
+ // adding to cache now for cyclic references
+ // Cloning all value and object properties, however ignoring properties
+ // defined via getter.
+ for (var i in value) {
+ var desc, p = value;
+ while (!(desc = Object.getOwnPropertyDescriptor(p, i))) {
+ p = Object.getPrototypeOf(p);
+ }
+ if (typeof desc.value === 'undefined' || typeof desc.value === 'function') {
+ continue;
+ }
+ result[i] = cloneValue(desc.value);
+ }
+ return result;
+ }
+ if (!this._defer) {
+ this._listeners.forEach(function (listener) {
+ listener.call(this, { data: obj });
+ }, this);
+ return;
+ }
+ var cloned = new WeakMap();
+ var e = { data: cloneValue(obj) };
+ this._deferred.then(function () {
+ this._listeners.forEach(function (listener) {
+ listener.call(this, e);
+ }, this);
+ }.bind(this));
+ },
+ addEventListener: function (name, listener) {
+ this._listeners.push(listener);
+ },
+ removeEventListener: function (name, listener) {
+ var i = this._listeners.indexOf(listener);
+ this._listeners.splice(i, 1);
+ },
+ terminate: function () {
+ this._listeners = [];
+ }
+ };
+ function createCDNWrapper(url) {
+ // We will rely on blob URL's property to specify origin.
+ // We want this function to fail in case if createObjectURL or Blob do not
+ // exist or fail for some reason -- our Worker creation will fail anyway.
+ var wrapper = 'importScripts(\'' + url + '\');';
+ return URL.createObjectURL(new Blob([wrapper]));
+ }
+ function PDFWorker(name) {
+ this.name = name;
+ this.destroyed = false;
+ this._readyCapability = createPromiseCapability();
+ this._port = null;
+ this._webWorker = null;
+ this._messageHandler = null;
+ this._initialize();
+ }
+ PDFWorker.prototype = /** @lends PDFWorker.prototype */
+ {
+ get promise() {
+ return this._readyCapability.promise;
+ },
+ get port() {
+ return this._port;
+ },
+ get messageHandler() {
+ return this._messageHandler;
+ },
+ _initialize: function PDFWorker_initialize() {
+ // If worker support isn't disabled explicit and the browser has worker
+ // support, create a new web worker and test if it/the browser fulfills
+ // 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 v.15.)
+ if (!isWorkerDisabled && !getDefaultSetting('disableWorker') && typeof Worker !== 'undefined') {
+ var workerSrc = getWorkerSrc();
+ 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', worker);
+ var terminateEarly = function () {
+ worker.removeEventListener('error', onWorkerError);
+ messageHandler.destroy();
+ worker.terminate();
+ if (this.destroyed) {
+ this._readyCapability.reject(new Error('Worker was destroyed'));
+ } else {
+ // Fall back to fake worker if the termination is caused by an
+ // error (e.g. NetworkError / SecurityError).
+ this._setupFakeWorker();
+ }
+ }.bind(this);
+ var onWorkerError = function (event) {
+ if (!this._webWorker) {
+ // Worker failed to initialize due to an error. Clean up and fall
+ // back to the fake worker.
+ terminateEarly();
+ }
+ }.bind(this);
+ worker.addEventListener('error', onWorkerError);
+ messageHandler.on('test', function PDFWorker_test(data) {
+ worker.removeEventListener('error', onWorkerError);
+ if (this.destroyed) {
+ terminateEarly();
+ return;
+ }
+ // worker was destroyed
+ var supportTypedArray = data && data.supportTypedArray;
+ if (supportTypedArray) {
+ this._messageHandler = messageHandler;
+ this._port = worker;
+ this._webWorker = worker;
+ if (!data.supportTransfers) {
+ isPostMessageTransfersDisabled = true;
+ }
+ this._readyCapability.resolve();
+ // Send global setting, e.g. verbosity level.
+ messageHandler.send('configure', { verbosity: getVerbosityLevel() });
+ } else {
+ this._setupFakeWorker();
+ messageHandler.destroy();
+ worker.terminate();
+ }
+ }.bind(this));
+ messageHandler.on('console_log', function (data) {
+ console.log.apply(console, data);
+ });
+ messageHandler.on('console_error', function (data) {
+ console.error.apply(console, data);
+ });
+ messageHandler.on('ready', function (data) {
+ worker.removeEventListener('error', onWorkerError);
+ if (this.destroyed) {
+ terminateEarly();
+ return;
+ }
+ // worker was destroyed
+ try {
+ sendTest();
+ } catch (e) {
+ // We need fallback to a faked worker.
+ this._setupFakeWorker();
+ }
+ }.bind(this));
+ var sendTest = function () {
+ var postMessageTransfers = getDefaultSetting('postMessageTransfers') && !isPostMessageTransfersDisabled;
+ var testObj = new Uint8Array([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, [testObj.buffer]);
+ } catch (ex) {
+ info('Cannot use postMessage transfers');
+ testObj[0] = 0;
+ messageHandler.send('test', testObj);
+ }
+ };
+ // It might take time for worker to initialize (especially when AMD
+ // loader is used). We will try to send test immediately, and then
+ // when 'ready' message will arrive. The worker shall process only
+ // first received 'test'.
+ sendTest();
+ 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.
+ this._setupFakeWorker();
+ },
+ _setupFakeWorker: function PDFWorker_setupFakeWorker() {
+ if (!isWorkerDisabled && !getDefaultSetting('disableWorker')) {
+ warn('Setting up fake worker.');
+ isWorkerDisabled = true;
+ }
+ setupFakeWorkerGlobal().then(function (WorkerMessageHandler) {
+ if (this.destroyed) {
+ this._readyCapability.reject(new Error('Worker was destroyed'));
+ return;
+ }
+ // We cannot turn on proper fake port simulation (this includes
+ // structured cloning) when typed arrays are not supported. Relying
+ // on a chance that messages will be sent in proper order.
+ var isTypedArraysPresent = Uint8Array !== Float32Array;
+ var port = new FakeWorkerPort(isTypedArraysPresent);
+ this._port = port;
+ // All fake workers use the same port, making id unique.
+ var id = 'fake' + nextFakeWorkerId++;
+ // If the main thread is our worker, setup the handling for the
+ // messages -- the main thread sends to it self.
+ var workerHandler = new MessageHandler(id + '_worker', id, port);
+ WorkerMessageHandler.setup(workerHandler, port);
+ var messageHandler = new MessageHandler(id, id + '_worker', port);
+ this._messageHandler = messageHandler;
+ this._readyCapability.resolve();
+ }.bind(this));
+ },
+ /**
+ * Destroys the worker instance.
+ */
+ destroy: function PDFWorker_destroy() {
+ this.destroyed = true;
+ if (this._webWorker) {
+ // We need to terminate only web worker created resource.
+ this._webWorker.terminate();
+ this._webWorker = null;
+ }
+ this._port = null;
+ if (this._messageHandler) {
+ this._messageHandler.destroy();
+ this._messageHandler = null;
+ }
+ }
+ };
+ return PDFWorker;
+ }();
+ /**
+ * For internal use only.
+ * @ignore
+ */
+ var WorkerTransport = function WorkerTransportClosure() {
+ function WorkerTransport(messageHandler, loadingTask, pdfDataRangeTransport) {
+ this.messageHandler = messageHandler;
+ this.loadingTask = loadingTask;
+ this.pdfDataRangeTransport = pdfDataRangeTransport;
+ this.commonObjs = new PDFObjects();
+ this.fontLoader = new FontLoader(loadingTask.docId);
+ this.destroyed = false;
+ this.destroyCapability = null;
+ this.pageCache = [];
+ this.pagePromises = [];
+ this.downloadInfoCapability = createPromiseCapability();
+ this.setupMessageHandler();
+ }
+ WorkerTransport.prototype = {
+ destroy: function WorkerTransport_destroy() {
+ if (this.destroyCapability) {
+ return this.destroyCapability.promise;
+ }
+ this.destroyed = true;
+ this.destroyCapability = createPromiseCapability();
+ var waitOn = [];
+ // We need to wait for all renderings to be completed, e.g.
+ // timeout/rAF can take a long time.
+ this.pageCache.forEach(function (page) {
+ if (page) {
+ waitOn.push(page._destroy());
+ }
+ });
+ this.pageCache = [];
+ this.pagePromises = [];
+ var self = this;
+ // We also need to wait for the worker to finish its long running tasks.
+ var terminated = this.messageHandler.sendWithPromise('Terminate', null);
+ waitOn.push(terminated);
+ Promise.all(waitOn).then(function () {
+ self.fontLoader.clear();
+ if (self.pdfDataRangeTransport) {
+ self.pdfDataRangeTransport.abort();
+ self.pdfDataRangeTransport = null;
+ }
+ if (self.messageHandler) {
+ self.messageHandler.destroy();
+ self.messageHandler = null;
+ }
+ self.destroyCapability.resolve();
+ }, this.destroyCapability.reject);
+ return this.destroyCapability.promise;
+ },
+ setupMessageHandler: function WorkerTransport_setupMessageHandler() {
+ var messageHandler = this.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 });
+ });
+ pdfDataRangeTransport.addProgressiveReadListener(function (chunk) {
+ messageHandler.send('OnDataRange', { chunk: chunk });
+ });
+ 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 loadingTask = this.loadingTask;
+ var pdfDocument = new PDFDocumentProxy(pdfInfo, this, loadingTask);
+ this.pdfDocument = pdfDocument;
+ loadingTask._capability.resolve(pdfDocument);
+ }, this);
+ messageHandler.on('NeedPassword', function transportNeedPassword(exception) {
+ var loadingTask = this.loadingTask;
+ if (loadingTask.onPassword) {
+ return loadingTask.onPassword(updatePassword, PasswordResponses.NEED_PASSWORD);
+ }
+ loadingTask._capability.reject(new PasswordException(exception.message, exception.code));
+ }, this);
+ messageHandler.on('IncorrectPassword', function transportIncorrectPassword(exception) {
+ var loadingTask = this.loadingTask;
+ if (loadingTask.onPassword) {
+ return loadingTask.onPassword(updatePassword, PasswordResponses.INCORRECT_PASSWORD);
+ }
+ loadingTask._capability.reject(new PasswordException(exception.message, exception.code));
+ }, this);
+ messageHandler.on('InvalidPDF', function transportInvalidPDF(exception) {
+ this.loadingTask._capability.reject(new InvalidPDFException(exception.message));
+ }, this);
+ messageHandler.on('MissingPDF', function transportMissingPDF(exception) {
+ this.loadingTask._capability.reject(new MissingPDFException(exception.message));
+ }, this);
+ messageHandler.on('UnexpectedResponse', function transportUnexpectedResponse(exception) {
+ this.loadingTask._capability.reject(new UnexpectedResponseException(exception.message, exception.status));
+ }, this);
+ messageHandler.on('UnknownError', function transportUnknownError(exception) {
+ this.loadingTask._capability.reject(new UnknownErrorException(exception.message, exception.details));
+ }, this);
+ messageHandler.on('DataLoaded', function transportPage(data) {
+ this.downloadInfoCapability.resolve(data);
+ }, this);
+ messageHandler.on('PDFManagerReady', function transportPage(data) {
+ if (this.pdfDataRangeTransport) {
+ this.pdfDataRangeTransport.transportReady();
+ }
+ }, this);
+ messageHandler.on('StartRenderPage', function transportRender(data) {
+ if (this.destroyed) {
+ return;
+ }
+ // Ignore any pending requests if the worker was terminated.
+ var page = this.pageCache[data.pageIndex];
+ page.stats.timeEnd('Page Request');
+ page._startRenderPage(data.transparency, data.intent);
+ }, this);
+ messageHandler.on('RenderPageChunk', function transportRender(data) {
+ if (this.destroyed) {
+ return;
+ }
+ // Ignore any pending requests if the worker was terminated.
+ var page = this.pageCache[data.pageIndex];
+ page._renderPageChunk(data.operatorList, data.intent);
+ }, this);
+ messageHandler.on('commonobj', function transportObj(data) {
+ if (this.destroyed) {
+ return;
+ }
+ // Ignore any pending requests if the worker was terminated.
+ var id = data[0];
+ var type = data[1];
+ if (this.commonObjs.hasData(id)) {
+ return;
+ }
+ switch (type) {
+ case 'Font':
+ var exportedData = data[2];
+ if ('error' in exportedData) {
+ var exportedError = exportedData.error;
+ warn('Error during font loading: ' + exportedError);
+ this.commonObjs.resolve(id, exportedError);
+ break;
+ }
+ var fontRegistry = null;
+ if (getDefaultSetting('pdfBug') && globalScope.FontInspector && globalScope['FontInspector'].enabled) {
+ fontRegistry = {
+ registerFont: function (font, url) {
+ globalScope['FontInspector'].fontAdded(font, url);
+ }
+ };
+ }
+ var font = new FontFaceObject(exportedData, {
+ isEvalSuported: getDefaultSetting('isEvalSupported'),
+ disableFontFace: getDefaultSetting('disableFontFace'),
+ fontRegistry: fontRegistry
+ });
+ this.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) {
+ if (this.destroyed) {
+ return;
+ }
+ // Ignore any pending requests if the worker was terminated.
+ var id = data[0];
+ var pageIndex = data[1];
+ var type = data[2];
+ var pageProxy = this.pageCache[pageIndex];
+ var imageData;
+ if (pageProxy.objs.hasData(id)) {
+ return;
+ }
+ switch (type) {
+ case 'JpegStream':
+ imageData = data[3];
+ loadJpegStream(id, imageData, pageProxy.objs);
+ break;
+ case 'Image':
+ imageData = data[3];
+ pageProxy.objs.resolve(id, imageData);
+ // heuristics that will allow not to store large data
+ var MAX_IMAGE_SIZE_TO_STORE = 8000000;
+ if (imageData && 'data' in imageData && imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) {
+ pageProxy.cleanupAfterRender = true;
+ }
+ break;
+ default:
+ error('Got unknown object type ' + type);
+ }
+ }, this);
+ messageHandler.on('DocProgress', function transportDocProgress(data) {
+ if (this.destroyed) {
+ return;
+ }
+ // Ignore any pending requests if the worker was terminated.
+ var loadingTask = this.loadingTask;
+ if (loadingTask.onProgress) {
+ loadingTask.onProgress({
+ loaded: data.loaded,
+ total: data.total
+ });
+ }
+ }, this);
+ messageHandler.on('PageError', function transportError(data) {
+ if (this.destroyed) {
+ return;
+ }
+ // Ignore any pending requests if the worker was terminated.
+ var page = this.pageCache[data.pageNum - 1];
+ var intentState = page.intentStates[data.intent];
+ if (intentState.displayReadyCapability) {
+ intentState.displayReadyCapability.reject(data.error);
+ } else {
+ error(data.error);
+ }
+ if (intentState.operatorList) {
+ // Mark operator list as complete.
+ intentState.operatorList.lastChunk = true;
+ for (var i = 0; i < intentState.renderTasks.length; i++) {
+ intentState.renderTasks[i].operatorListChanged();
+ }
+ }
+ }, this);
+ messageHandler.on('UnsupportedFeature', function transportUnsupportedFeature(data) {
+ if (this.destroyed) {
+ return;
+ }
+ // Ignore any pending requests if the worker was terminated.
+ var featureId = data.featureId;
+ var loadingTask = this.loadingTask;
+ if (loadingTask.onUnsupportedFeature) {
+ loadingTask.onUnsupportedFeature(featureId);
+ }
+ _UnsupportedManager.notify(featureId);
+ }, this);
+ messageHandler.on('JpegDecode', function (data) {
+ if (this.destroyed) {
+ return Promise.reject(new Error('Worker was destroyed'));
+ }
+ var imageUrl = data[0];
+ var components = data[1];
+ if (components !== 3 && components !== 1) {
+ return Promise.reject(new Error('Only 3 components or 1 component can be returned'));
+ }
+ return new Promise(function (resolve, reject) {
+ var img = new Image();
+ img.onload = function () {
+ var width = img.width;
+ var height = img.height;
+ var size = width * height;
+ var rgbaLength = size * 4;
+ var buf = new Uint8Array(size * components);
+ var tmpCanvas = createScratchCanvas(width, height);
+ var tmpCtx = tmpCanvas.getContext('2d');
+ tmpCtx.drawImage(img, 0, 0);
+ var data = tmpCtx.getImageData(0, 0, width, height).data;
+ var i, j;
+ if (components === 3) {
+ for (i = 0, j = 0; i < rgbaLength; i += 4, j += 3) {
+ buf[j] = data[i];
+ buf[j + 1] = data[i + 1];
+ buf[j + 2] = data[i + 2];
+ }
+ } else if (components === 1) {
+ for (i = 0, j = 0; i < rgbaLength; i += 4, j++) {
+ buf[j] = data[i];
+ }
+ }
+ resolve({
+ data: buf,
+ width: width,
+ height: height
+ });
+ };
+ img.onerror = function () {
+ reject(new Error('JpegDecode failed to load image'));
+ };
+ img.src = imageUrl;
+ });
+ }, this);
+ },
+ getData: function WorkerTransport_getData() {
+ return this.messageHandler.sendWithPromise('GetData', null);
+ },
+ getPage: function WorkerTransport_getPage(pageNumber, capability) {
+ if (!isInt(pageNumber) || pageNumber <= 0 || pageNumber > this.numPages) {
+ return Promise.reject(new Error('Invalid page request'));
+ }
+ var pageIndex = pageNumber - 1;
+ if (pageIndex in this.pagePromises) {
+ return this.pagePromises[pageIndex];
+ }
+ var promise = this.messageHandler.sendWithPromise('GetPage', { pageIndex: pageIndex }).then(function (pageInfo) {
+ if (this.destroyed) {
+ throw new Error('Transport destroyed');
+ }
+ var page = new PDFPageProxy(pageIndex, pageInfo, this);
+ this.pageCache[pageIndex] = page;
+ return page;
+ }.bind(this));
+ this.pagePromises[pageIndex] = promise;
+ return promise;
+ },
+ getPageIndex: function WorkerTransport_getPageIndexByRef(ref) {
+ return this.messageHandler.sendWithPromise('GetPageIndex', { ref: ref }).catch(function (reason) {
+ return Promise.reject(new Error(reason));
+ });
+ },
+ getAnnotations: function WorkerTransport_getAnnotations(pageIndex, intent) {
+ return this.messageHandler.sendWithPromise('GetAnnotations', {
+ pageIndex: pageIndex,
+ intent: intent
+ });
+ },
+ getDestinations: function WorkerTransport_getDestinations() {
+ return this.messageHandler.sendWithPromise('GetDestinations', null);
+ },
+ getDestination: function WorkerTransport_getDestination(id) {
+ return this.messageHandler.sendWithPromise('GetDestination', { id: id });
+ },
+ getPageLabels: function WorkerTransport_getPageLabels() {
+ return this.messageHandler.sendWithPromise('GetPageLabels', null);
+ },
+ getAttachments: function WorkerTransport_getAttachments() {
+ return this.messageHandler.sendWithPromise('GetAttachments', null);
+ },
+ getJavaScript: function WorkerTransport_getJavaScript() {
+ return this.messageHandler.sendWithPromise('GetJavaScript', null);
+ },
+ getOutline: function WorkerTransport_getOutline() {
+ return this.messageHandler.sendWithPromise('GetOutline', null);
+ },
+ getMetadata: function WorkerTransport_getMetadata() {
+ return this.messageHandler.sendWithPromise('GetMetadata', null).then(function transportMetadata(results) {
+ return {
+ info: results[0],
+ metadata: results[1] ? new Metadata(results[1]) : null
+ };
+ });
+ },
+ getStats: function WorkerTransport_getStats() {
+ return this.messageHandler.sendWithPromise('GetStats', null);
+ },
+ startCleanup: function WorkerTransport_startCleanup() {
+ this.messageHandler.sendWithPromise('Cleanup', null).then(function endCleanup() {
+ for (var i = 0, ii = this.pageCache.length; i < ii; i++) {
+ var page = this.pageCache[i];
+ if (page) {
+ page.cleanup();
+ }
+ }
+ this.commonObjs.clear();
+ this.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 = Object.create(null);
+ }
+ 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 = {
+ capability: createPromiseCapability(),
+ 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).capability.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.capability.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 = Object.create(null);
+ }
+ };
+ return PDFObjects;
+ }();
+ /**
+ * Allows controlling of the rendering tasks.
+ * @class
+ * @alias RenderTask
+ */
+ var RenderTask = function RenderTaskClosure() {
+ function RenderTask(internalRenderTask) {
+ this._internalRenderTask = internalRenderTask;
+ /**
+ * Callback for incremental rendering -- 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.
+ * @type {function}
+ */
+ this.onContinue = null;
+ }
+ RenderTask.prototype = /** @lends RenderTask.prototype */
+ {
+ /**
+ * Promise for rendering task completion.
+ * @return {Promise}
+ */
+ get promise() {
+ return this._internalRenderTask.capability.promise;
+ },
+ /**
+ * 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();
+ },
+ /**
+ * Registers callbacks to indicate the rendering task completion.
+ *
+ * @param {function} onFulfilled The callback for the rendering completion.
+ * @param {function} onRejected The callback for the rendering failure.
+ * @return {Promise} A promise that is resolved after the onFulfilled or
+ * onRejected callback.
+ */
+ then: function RenderTask_then(onFulfilled, onRejected) {
+ return this.promise.then.apply(this.promise, arguments);
+ }
+ };
+ 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.useRequestAnimationFrame = false;
+ this.cancelled = false;
+ this.capability = createPromiseCapability();
+ this.task = new RenderTask(this);
+ // caching this-bound methods
+ this._continueBound = this._continue.bind(this);
+ this._scheduleNextBound = this._scheduleNext.bind(this);
+ this._nextBound = this._next.bind(this);
+ }
+ InternalRenderTask.prototype = {
+ initializeGraphics: function InternalRenderTask_initializeGraphics(transparency) {
+ if (this.cancelled) {
+ return;
+ }
+ if (getDefaultSetting('pdfBug') && globalScope.StepperManager && globalScope.StepperManager.enabled) {
+ this.stepper = globalScope.StepperManager.create(this.pageNumber - 1);
+ this.stepper.init(this.operatorList);
+ this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();
+ }
+ var params = this.params;
+ this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs, this.objs, params.imageLayer);
+ this.gfx.beginDrawing(params.transform, 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._continueBound;
+ }
+ 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.task.onContinue) {
+ this.task.onContinue.call(this.task, this._scheduleNextBound);
+ } else {
+ this._scheduleNext();
+ }
+ },
+ _scheduleNext: function InternalRenderTask__scheduleNext() {
+ if (this.useRequestAnimationFrame && typeof window !== 'undefined') {
+ window.requestAnimationFrame(this._nextBound);
+ } else {
+ Promise.resolve(undefined).then(this._nextBound);
+ }
+ },
+ _next: function InternalRenderTask__next() {
+ if (this.cancelled) {
+ return;
+ }
+ this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList, this.operatorListIdx, this._continueBound, this.stepper);
+ if (this.operatorListIdx === this.operatorList.argsArray.length) {
+ this.running = false;
+ if (this.operatorList.lastChunk) {
+ this.gfx.endDrawing();
+ this.callback();
+ }
+ }
+ }
+ };
+ return InternalRenderTask;
+ }();
+ /**
+ * (Deprecated) Global observer of unsupported feature usages. Use
+ * onUnsupportedFeature callback of the {PDFDocumentLoadingTask} instance.
+ */
+ var _UnsupportedManager = function UnsupportedManagerClosure() {
+ var listeners = [];
+ return {
+ listen: function (cb) {
+ deprecated('Global UnsupportedManager.listen is used: ' + ' use PDFDocumentLoadingTask.onUnsupportedFeature instead');
+ listeners.push(cb);
+ },
+ notify: function (featureId) {
+ for (var i = 0, ii = listeners.length; i < ii; i++) {
+ listeners[i](featureId);
+ }
+ }
+ };
+ }();
+ if (typeof pdfjsVersion !== 'undefined') {
+ exports.version = pdfjsVersion;
+ }
+ if (typeof pdfjsBuild !== 'undefined') {
+ exports.build = pdfjsBuild;
+ }
+ exports.getDocument = getDocument;
+ exports.PDFDataRangeTransport = PDFDataRangeTransport;
+ exports.PDFWorker = PDFWorker;
+ exports.PDFDocumentProxy = PDFDocumentProxy;
+ exports.PDFPageProxy = PDFPageProxy;
+ exports._UnsupportedManager = _UnsupportedManager;
+ }));
+ (function (root, factory) {
+ factory(root.pdfjsDisplayGlobal = {}, root.pdfjsSharedUtil, root.pdfjsDisplayDOMUtils, root.pdfjsDisplayAPI, root.pdfjsDisplayAnnotationLayer, root.pdfjsDisplayTextLayer, root.pdfjsDisplayMetadata, root.pdfjsDisplaySVG);
+ }(this, function (exports, sharedUtil, displayDOMUtils, displayAPI, displayAnnotationLayer, displayTextLayer, displayMetadata, displaySVG) {
+ var globalScope = sharedUtil.globalScope;
+ var deprecated = sharedUtil.deprecated;
+ var warn = sharedUtil.warn;
+ var LinkTarget = displayDOMUtils.LinkTarget;
+ var isWorker = typeof window === 'undefined';
+ // The global PDFJS object is now deprecated and will not be supported in
+ // the future. The members below are maintained for backward compatibility
+ // and shall not be extended or modified. If the global.js is included as
+ // a module, we will create a global PDFJS object instance or use existing.
+ if (!globalScope.PDFJS) {
+ globalScope.PDFJS = {};
+ }
+ var PDFJS = globalScope.PDFJS;
+ if (typeof pdfjsVersion !== 'undefined') {
+ PDFJS.version = pdfjsVersion;
+ }
+ if (typeof pdfjsBuild !== 'undefined') {
+ PDFJS.build = pdfjsBuild;
+ }
+ PDFJS.pdfBug = false;
+ if (PDFJS.verbosity !== undefined) {
+ sharedUtil.setVerbosityLevel(PDFJS.verbosity);
+ }
+ delete PDFJS.verbosity;
+ Object.defineProperty(PDFJS, 'verbosity', {
+ get: function () {
+ return sharedUtil.getVerbosityLevel();
+ },
+ set: function (level) {
+ sharedUtil.setVerbosityLevel(level);
+ },
+ enumerable: true,
+ configurable: true
+ });
+ PDFJS.VERBOSITY_LEVELS = sharedUtil.VERBOSITY_LEVELS;
+ PDFJS.OPS = sharedUtil.OPS;
+ PDFJS.UNSUPPORTED_FEATURES = sharedUtil.UNSUPPORTED_FEATURES;
+ PDFJS.isValidUrl = displayDOMUtils.isValidUrl;
+ PDFJS.shadow = sharedUtil.shadow;
+ PDFJS.createBlob = sharedUtil.createBlob;
+ PDFJS.createObjectURL = function PDFJS_createObjectURL(data, contentType) {
+ return sharedUtil.createObjectURL(data, contentType, PDFJS.disableCreateObjectURL);
+ };
+ Object.defineProperty(PDFJS, 'isLittleEndian', {
+ configurable: true,
+ get: function PDFJS_isLittleEndian() {
+ var value = sharedUtil.isLittleEndian();
+ return sharedUtil.shadow(PDFJS, 'isLittleEndian', value);
+ }
+ });
+ PDFJS.removeNullCharacters = sharedUtil.removeNullCharacters;
+ PDFJS.PasswordResponses = sharedUtil.PasswordResponses;
+ PDFJS.PasswordException = sharedUtil.PasswordException;
+ PDFJS.UnknownErrorException = sharedUtil.UnknownErrorException;
+ PDFJS.InvalidPDFException = sharedUtil.InvalidPDFException;
+ PDFJS.MissingPDFException = sharedUtil.MissingPDFException;
+ PDFJS.UnexpectedResponseException = sharedUtil.UnexpectedResponseException;
+ PDFJS.Util = sharedUtil.Util;
+ PDFJS.PageViewport = sharedUtil.PageViewport;
+ PDFJS.createPromiseCapability = sharedUtil.createPromiseCapability;
+ /**
+ * The maximum allowed image size in total pixels e.g. width * height. Images
+ * above this value will not be drawn. Use -1 for no limit.
+ * @var {number}
+ */
+ PDFJS.maxImageSize = PDFJS.maxImageSize === undefined ? -1 : PDFJS.maxImageSize;
+ /**
+ * The url of where the predefined Adobe CMaps are located. Include trailing
+ * slash.
+ * @var {string}
+ */
+ PDFJS.cMapUrl = PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl;
+ /**
+ * Specifies if CMaps are binary packed.
+ * @var {boolean}
+ */
+ PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked;
+ /**
+ * By default fonts are converted to OpenType fonts and loaded via font face
+ * rules. If disabled, the font will be rendered using a built in font
+ * renderer that constructs the glyphs with primitive path commands.
+ * @var {boolean}
+ */
+ PDFJS.disableFontFace = PDFJS.disableFontFace === undefined ? false : PDFJS.disableFontFace;
+ /**
+ * Path for image resources, mainly for annotation icons. Include trailing
+ * slash.
+ * @var {string}
+ */
+ PDFJS.imageResourcesPath = PDFJS.imageResourcesPath === undefined ? '' : PDFJS.imageResourcesPath;
+ /**
+ * Disable the web worker and run all code on the main thread. This will
+ * happen automatically if the browser doesn't support workers or sending
+ * typed arrays to workers.
+ * @var {boolean}
+ */
+ PDFJS.disableWorker = PDFJS.disableWorker === undefined ? false : PDFJS.disableWorker;
+ /**
+ * Path and filename of the worker file. Required when the worker is enabled
+ * in development mode. If unspecified in the production build, the worker
+ * will be loaded based on the location of the pdf.js file. It is recommended
+ * that the workerSrc is set in a custom application to prevent issues caused
+ * by third-party frameworks and libraries.
+ * @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 streaming of PDF file data. By default PDF.js attempts to load PDF
+ * in chunks. This default behavior can be disabled.
+ * @var {boolean}
+ */
+ PDFJS.disableStream = PDFJS.disableStream === undefined ? false : PDFJS.disableStream;
+ /**
+ * 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.
+ *
+ * NOTE: It is also necessary to disable streaming, see above,
+ * in order for disabling of pre-fetching to work correctly.
+ * @var {boolean}
+ */
+ PDFJS.disableAutoFetch = PDFJS.disableAutoFetch === undefined ? false : PDFJS.disableAutoFetch;
+ /**
+ * Enables special hooks for debugging PDF.js.
+ * @var {boolean}
+ */
+ PDFJS.pdfBug = PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug;
+ /**
+ * Enables transfer usage in postMessage for ArrayBuffers.
+ * @var {boolean}
+ */
+ PDFJS.postMessageTransfers = PDFJS.postMessageTransfers === undefined ? true : PDFJS.postMessageTransfers;
+ /**
+ * Disables URL.createObjectURL usage.
+ * @var {boolean}
+ */
+ PDFJS.disableCreateObjectURL = PDFJS.disableCreateObjectURL === undefined ? false : PDFJS.disableCreateObjectURL;
+ /**
+ * Disables WebGL usage.
+ * @var {boolean}
+ */
+ PDFJS.disableWebGL = PDFJS.disableWebGL === undefined ? true : PDFJS.disableWebGL;
+ /**
+ * Specifies the |target| attribute for external links.
+ * The constants from PDFJS.LinkTarget should be used:
+ * - NONE [default]
+ * - SELF
+ * - BLANK
+ * - PARENT
+ * - TOP
+ * @var {number}
+ */
+ PDFJS.externalLinkTarget = PDFJS.externalLinkTarget === undefined ? LinkTarget.NONE : PDFJS.externalLinkTarget;
+ /**
+ * Specifies the |rel| attribute for external links. Defaults to stripping
+ * the referrer.
+ * @var {string}
+ */
+ PDFJS.externalLinkRel = PDFJS.externalLinkRel === undefined ? 'noreferrer' : PDFJS.externalLinkRel;
+ /**
+ * Determines if we can eval strings as JS. Primarily used to improve
+ * performance for font rendering.
+ * @var {boolean}
+ */
+ PDFJS.isEvalSupported = PDFJS.isEvalSupported === undefined ? true : PDFJS.isEvalSupported;
+ PDFJS.getDocument = displayAPI.getDocument;
+ PDFJS.PDFDataRangeTransport = displayAPI.PDFDataRangeTransport;
+ PDFJS.PDFWorker = displayAPI.PDFWorker;
+ Object.defineProperty(PDFJS, 'hasCanvasTypedArrays', {
+ configurable: true,
+ get: function PDFJS_hasCanvasTypedArrays() {
+ var value = displayDOMUtils.hasCanvasTypedArrays();
+ return sharedUtil.shadow(PDFJS, 'hasCanvasTypedArrays', value);
+ }
+ });
+ PDFJS.CustomStyle = displayDOMUtils.CustomStyle;
+ PDFJS.LinkTarget = LinkTarget;
+ PDFJS.addLinkAttributes = displayDOMUtils.addLinkAttributes;
+ PDFJS.getFilenameFromUrl = displayDOMUtils.getFilenameFromUrl;
+ PDFJS.isExternalLinkTargetSet = displayDOMUtils.isExternalLinkTargetSet;
+ PDFJS.AnnotationLayer = displayAnnotationLayer.AnnotationLayer;
+ PDFJS.renderTextLayer = displayTextLayer.renderTextLayer;
+ PDFJS.Metadata = displayMetadata.Metadata;
+ PDFJS.SVGGraphics = displaySVG.SVGGraphics;
+ PDFJS.UnsupportedManager = displayAPI._UnsupportedManager;
+ exports.globalScope = globalScope;
+ exports.isWorker = isWorker;
+ exports.PDFJS = globalScope.PDFJS;
+ }));
+ }.call(pdfjsLibs));
+ exports.PDFJS = pdfjsLibs.pdfjsDisplayGlobal.PDFJS;
+ exports.build = pdfjsLibs.pdfjsDisplayAPI.build;
+ exports.version = pdfjsLibs.pdfjsDisplayAPI.version;
+ exports.getDocument = pdfjsLibs.pdfjsDisplayAPI.getDocument;
+ exports.PDFDataRangeTransport = pdfjsLibs.pdfjsDisplayAPI.PDFDataRangeTransport;
+ exports.PDFWorker = pdfjsLibs.pdfjsDisplayAPI.PDFWorker;
+ exports.renderTextLayer = pdfjsLibs.pdfjsDisplayTextLayer.renderTextLayer;
+ exports.AnnotationLayer = pdfjsLibs.pdfjsDisplayAnnotationLayer.AnnotationLayer;
+ exports.CustomStyle = pdfjsLibs.pdfjsDisplayDOMUtils.CustomStyle;
+ exports.PasswordResponses = pdfjsLibs.pdfjsSharedUtil.PasswordResponses;
+ exports.InvalidPDFException = pdfjsLibs.pdfjsSharedUtil.InvalidPDFException;
+ exports.MissingPDFException = pdfjsLibs.pdfjsSharedUtil.MissingPDFException;
+ exports.SVGGraphics = pdfjsLibs.pdfjsDisplaySVG.SVGGraphics;
+ exports.UnexpectedResponseException = pdfjsLibs.pdfjsSharedUtil.UnexpectedResponseException;
+ exports.OPS = pdfjsLibs.pdfjsSharedUtil.OPS;
+ exports.UNSUPPORTED_FEATURES = pdfjsLibs.pdfjsSharedUtil.UNSUPPORTED_FEATURES;
+ exports.isValidUrl = pdfjsLibs.pdfjsDisplayDOMUtils.isValidUrl;
+ exports.createValidAbsoluteUrl = pdfjsLibs.pdfjsSharedUtil.createValidAbsoluteUrl;
+ exports.createObjectURL = pdfjsLibs.pdfjsSharedUtil.createObjectURL;
+ exports.removeNullCharacters = pdfjsLibs.pdfjsSharedUtil.removeNullCharacters;
+ exports.shadow = pdfjsLibs.pdfjsSharedUtil.shadow;
+ exports.createBlob = pdfjsLibs.pdfjsSharedUtil.createBlob;
+ exports.getFilenameFromUrl = pdfjsLibs.pdfjsDisplayDOMUtils.getFilenameFromUrl;
+ exports.addLinkAttributes = pdfjsLibs.pdfjsDisplayDOMUtils.addLinkAttributes;
+})); \ No newline at end of file
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 16:05:34 +0000