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- /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
- /* Copyright 2012 Mozilla Foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- // Initializing PDFJS global object (if still undefined)
- if (typeof PDFJS === 'undefined') {
- (typeof window !== 'undefined' ? window : this).PDFJS = {};
- }
- PDFJS.version = '0.8.958';
- PDFJS.build = 'd45d7bc';
- (function pdfjsWrapper() {
- // Use strict in our context only - users might not want it
- 'use strict';
- /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
- /* Copyright 2012 Mozilla Foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- /* globals Cmd, ColorSpace, Dict, MozBlobBuilder, Name, PDFJS, Ref, URL,
- Promise */
- 'use strict';
- var globalScope = (typeof window === 'undefined') ? this : window;
- var isWorker = (typeof window == 'undefined');
- var FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0];
- var TextRenderingMode = {
- FILL: 0,
- STROKE: 1,
- FILL_STROKE: 2,
- INVISIBLE: 3,
- FILL_ADD_TO_PATH: 4,
- STROKE_ADD_TO_PATH: 5,
- FILL_STROKE_ADD_TO_PATH: 6,
- ADD_TO_PATH: 7,
- FILL_STROKE_MASK: 3,
- ADD_TO_PATH_FLAG: 4
- };
- // The global PDFJS object exposes the API
- // In production, it will be declared outside a global wrapper
- // In development, it will be declared here
- if (!globalScope.PDFJS) {
- globalScope.PDFJS = {};
- }
- globalScope.PDFJS.pdfBug = false;
- PDFJS.VERBOSITY_LEVELS = {
- errors: 0,
- warnings: 1,
- infos: 5
- };
- // All the possible operations for an operator list.
- var OPS = PDFJS.OPS = {
- // Intentionally start from 1 so it is easy to spot bad operators that will be
- // 0's.
- dependency: 1,
- setLineWidth: 2,
- setLineCap: 3,
- setLineJoin: 4,
- setMiterLimit: 5,
- setDash: 6,
- setRenderingIntent: 7,
- setFlatness: 8,
- setGState: 9,
- save: 10,
- restore: 11,
- transform: 12,
- moveTo: 13,
- lineTo: 14,
- curveTo: 15,
- curveTo2: 16,
- curveTo3: 17,
- closePath: 18,
- rectangle: 19,
- stroke: 20,
- closeStroke: 21,
- fill: 22,
- eoFill: 23,
- fillStroke: 24,
- eoFillStroke: 25,
- closeFillStroke: 26,
- closeEOFillStroke: 27,
- endPath: 28,
- clip: 29,
- eoClip: 30,
- beginText: 31,
- endText: 32,
- setCharSpacing: 33,
- setWordSpacing: 34,
- setHScale: 35,
- setLeading: 36,
- setFont: 37,
- setTextRenderingMode: 38,
- setTextRise: 39,
- moveText: 40,
- setLeadingMoveText: 41,
- setTextMatrix: 42,
- nextLine: 43,
- showText: 44,
- showSpacedText: 45,
- nextLineShowText: 46,
- nextLineSetSpacingShowText: 47,
- setCharWidth: 48,
- setCharWidthAndBounds: 49,
- setStrokeColorSpace: 50,
- setFillColorSpace: 51,
- setStrokeColor: 52,
- setStrokeColorN: 53,
- setFillColor: 54,
- setFillColorN: 55,
- setStrokeGray: 56,
- setFillGray: 57,
- setStrokeRGBColor: 58,
- setFillRGBColor: 59,
- setStrokeCMYKColor: 60,
- setFillCMYKColor: 61,
- shadingFill: 62,
- beginInlineImage: 63,
- beginImageData: 64,
- endInlineImage: 65,
- paintXObject: 66,
- markPoint: 67,
- markPointProps: 68,
- beginMarkedContent: 69,
- beginMarkedContentProps: 70,
- endMarkedContent: 71,
- beginCompat: 72,
- endCompat: 73,
- paintFormXObjectBegin: 74,
- paintFormXObjectEnd: 75,
- beginGroup: 76,
- endGroup: 77,
- beginAnnotations: 78,
- endAnnotations: 79,
- beginAnnotation: 80,
- endAnnotation: 81,
- paintJpegXObject: 82,
- paintImageMaskXObject: 83,
- paintImageMaskXObjectGroup: 84,
- paintImageXObject: 85,
- paintInlineImageXObject: 86,
- paintInlineImageXObjectGroup: 87
- };
- // A notice for devs. These are good for things that are helpful to devs, such
- // as warning that Workers were disabled, which is important to devs but not
- // end users.
- function info(msg) {
- if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.infos) {
- console.log('Info: ' + msg);
- }
- }
- // Non-fatal warnings.
- function warn(msg) {
- if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.warnings) {
- console.log('Warning: ' + msg);
- }
- }
- // Fatal errors that should trigger the fallback UI and halt execution by
- // throwing an exception.
- function error(msg) {
- // If multiple arguments were passed, pass them all to the log function.
- if (arguments.length > 1) {
- var logArguments = ['Error:'];
- logArguments.push.apply(logArguments, arguments);
- console.log.apply(console, logArguments);
- // Join the arguments into a single string for the lines below.
- msg = [].join.call(arguments, ' ');
- } else {
- console.log('Error: ' + msg);
- }
- console.log(backtrace());
- UnsupportedManager.notify(UNSUPPORTED_FEATURES.unknown);
- throw new Error(msg);
- }
- function backtrace() {
- try {
- throw new Error();
- } catch (e) {
- return e.stack ? e.stack.split('\n').slice(2).join('\n') : '';
- }
- }
- function assert(cond, msg) {
- if (!cond)
- error(msg);
- }
- var UNSUPPORTED_FEATURES = PDFJS.UNSUPPORTED_FEATURES = {
- unknown: 'unknown',
- forms: 'forms',
- javaScript: 'javaScript',
- smask: 'smask',
- shadingPattern: 'shadingPattern',
- font: 'font'
- };
- var UnsupportedManager = PDFJS.UnsupportedManager =
- (function UnsupportedManagerClosure() {
- var listeners = [];
- return {
- listen: function (cb) {
- listeners.push(cb);
- },
- notify: function (featureId) {
- warn('Unsupported feature "' + featureId + '"');
- for (var i = 0, ii = listeners.length; i < ii; i++) {
- listeners[i](featureId);
- }
- }
- };
- })();
- // Combines two URLs. The baseUrl shall be absolute URL. If the url is an
- // absolute URL, it will be returned as is.
- function combineUrl(baseUrl, url) {
- if (!url)
- return baseUrl;
- if (/^[a-z][a-z0-9+\-.]*:/i.test(url))
- return url;
- if (url.charAt(0) == '/') {
- // absolute path
- var i = baseUrl.indexOf('://');
- i = baseUrl.indexOf('/', i + 3);
- return baseUrl.substring(0, i) + url;
- } else {
- // relative path
- var pathLength = baseUrl.length, i;
- i = baseUrl.lastIndexOf('#');
- pathLength = i >= 0 ? i : pathLength;
- i = baseUrl.lastIndexOf('?', pathLength);
- pathLength = i >= 0 ? i : pathLength;
- var prefixLength = baseUrl.lastIndexOf('/', pathLength);
- return baseUrl.substring(0, prefixLength + 1) + url;
- }
- }
- // Validates if URL is safe and allowed, e.g. to avoid XSS.
- function isValidUrl(url, allowRelative) {
- if (!url) {
- return false;
- }
- // RFC 3986 (http://tools.ietf.org/html/rfc3986#section-3.1)
- // scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
- var protocol = /^[a-z][a-z0-9+\-.]*(?=:)/i.exec(url);
- if (!protocol) {
- return allowRelative;
- }
- protocol = protocol[0].toLowerCase();
- switch (protocol) {
- case 'http':
- case 'https':
- case 'ftp':
- case 'mailto':
- return true;
- default:
- return false;
- }
- }
- PDFJS.isValidUrl = isValidUrl;
- // In a well-formed PDF, |cond| holds. If it doesn't, subsequent
- // behavior is undefined.
- function assertWellFormed(cond, msg) {
- if (!cond)
- error(msg);
- }
- function shadow(obj, prop, value) {
- Object.defineProperty(obj, prop, { value: value,
- enumerable: true,
- configurable: true,
- writable: false });
- return value;
- }
- var PasswordResponses = PDFJS.PasswordResponses = {
- NEED_PASSWORD: 1,
- INCORRECT_PASSWORD: 2
- };
- var PasswordException = (function PasswordExceptionClosure() {
- function PasswordException(msg, code) {
- this.name = 'PasswordException';
- this.message = msg;
- this.code = code;
- }
- PasswordException.prototype = new Error();
- PasswordException.constructor = PasswordException;
- return PasswordException;
- })();
- var UnknownErrorException = (function UnknownErrorExceptionClosure() {
- function UnknownErrorException(msg, details) {
- this.name = 'UnknownErrorException';
- this.message = msg;
- this.details = details;
- }
- UnknownErrorException.prototype = new Error();
- UnknownErrorException.constructor = UnknownErrorException;
- return UnknownErrorException;
- })();
- var InvalidPDFException = (function InvalidPDFExceptionClosure() {
- function InvalidPDFException(msg) {
- this.name = 'InvalidPDFException';
- this.message = msg;
- }
- InvalidPDFException.prototype = new Error();
- InvalidPDFException.constructor = InvalidPDFException;
- return InvalidPDFException;
- })();
- var MissingPDFException = (function MissingPDFExceptionClosure() {
- function MissingPDFException(msg) {
- this.name = 'MissingPDFException';
- this.message = msg;
- }
- MissingPDFException.prototype = new Error();
- MissingPDFException.constructor = MissingPDFException;
- return MissingPDFException;
- })();
- var NotImplementedException = (function NotImplementedExceptionClosure() {
- function NotImplementedException(msg) {
- this.message = msg;
- }
- NotImplementedException.prototype = new Error();
- NotImplementedException.prototype.name = 'NotImplementedException';
- NotImplementedException.constructor = NotImplementedException;
- return NotImplementedException;
- })();
- var MissingDataException = (function MissingDataExceptionClosure() {
- function MissingDataException(begin, end) {
- this.begin = begin;
- this.end = end;
- this.message = 'Missing data [' + begin + ', ' + end + ')';
- }
- MissingDataException.prototype = new Error();
- MissingDataException.prototype.name = 'MissingDataException';
- MissingDataException.constructor = MissingDataException;
- return MissingDataException;
- })();
- var XRefParseException = (function XRefParseExceptionClosure() {
- function XRefParseException(msg) {
- this.message = msg;
- }
- XRefParseException.prototype = new Error();
- XRefParseException.prototype.name = 'XRefParseException';
- XRefParseException.constructor = XRefParseException;
- return XRefParseException;
- })();
- function bytesToString(bytes) {
- var str = '';
- var length = bytes.length;
- for (var n = 0; n < length; ++n)
- str += String.fromCharCode(bytes[n]);
- return str;
- }
- function stringToBytes(str) {
- var length = str.length;
- var bytes = new Uint8Array(length);
- for (var n = 0; n < length; ++n)
- bytes[n] = str.charCodeAt(n) & 0xFF;
- return bytes;
- }
- var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];
- var Util = PDFJS.Util = (function UtilClosure() {
- function Util() {}
- Util.makeCssRgb = function Util_makeCssRgb(rgb) {
- return 'rgb(' + rgb[0] + ',' + rgb[1] + ',' + rgb[2] + ')';
- };
- Util.makeCssCmyk = function Util_makeCssCmyk(cmyk) {
- var rgb = ColorSpace.singletons.cmyk.getRgb(cmyk, 0);
- return Util.makeCssRgb(rgb);
- };
- // Concatenates two transformation matrices together and returns the result.
- Util.transform = function Util_transform(m1, m2) {
- return [
- m1[0] * m2[0] + m1[2] * m2[1],
- m1[1] * m2[0] + m1[3] * m2[1],
- m1[0] * m2[2] + m1[2] * m2[3],
- m1[1] * m2[2] + m1[3] * m2[3],
- m1[0] * m2[4] + m1[2] * m2[5] + m1[4],
- m1[1] * m2[4] + m1[3] * m2[5] + m1[5]
- ];
- };
- // For 2d affine transforms
- Util.applyTransform = function Util_applyTransform(p, m) {
- var xt = p[0] * m[0] + p[1] * m[2] + m[4];
- var yt = p[0] * m[1] + p[1] * m[3] + m[5];
- return [xt, yt];
- };
- Util.applyInverseTransform = function Util_applyInverseTransform(p, m) {
- var d = m[0] * m[3] - m[1] * m[2];
- var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;
- var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;
- return [xt, yt];
- };
- // Applies the transform to the rectangle and finds the minimum axially
- // aligned bounding box.
- Util.getAxialAlignedBoundingBox =
- function Util_getAxialAlignedBoundingBox(r, m) {
- var p1 = Util.applyTransform(r, m);
- var p2 = Util.applyTransform(r.slice(2, 4), m);
- var p3 = Util.applyTransform([r[0], r[3]], m);
- var p4 = Util.applyTransform([r[2], r[1]], m);
- return [
- Math.min(p1[0], p2[0], p3[0], p4[0]),
- Math.min(p1[1], p2[1], p3[1], p4[1]),
- Math.max(p1[0], p2[0], p3[0], p4[0]),
- Math.max(p1[1], p2[1], p3[1], p4[1])
- ];
- };
- Util.inverseTransform = function Util_inverseTransform(m) {
- var d = m[0] * m[3] - m[1] * m[2];
- return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d,
- (m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d];
- };
- // Apply a generic 3d matrix M on a 3-vector v:
- // | a b c | | X |
- // | d e f | x | Y |
- // | g h i | | Z |
- // M is assumed to be serialized as [a,b,c,d,e,f,g,h,i],
- // with v as [X,Y,Z]
- Util.apply3dTransform = function Util_apply3dTransform(m, v) {
- return [
- m[0] * v[0] + m[1] * v[1] + m[2] * v[2],
- m[3] * v[0] + m[4] * v[1] + m[5] * v[2],
- m[6] * v[0] + m[7] * v[1] + m[8] * v[2]
- ];
- };
- // This calculation uses Singular Value Decomposition.
- // The SVD can be represented with formula A = USV. We are interested in the
- // matrix S here because it represents the scale values.
- Util.singularValueDecompose2dScale =
- function Util_singularValueDecompose2dScale(m) {
- var transpose = [m[0], m[2], m[1], m[3]];
- // Multiply matrix m with its transpose.
- var a = m[0] * transpose[0] + m[1] * transpose[2];
- var b = m[0] * transpose[1] + m[1] * transpose[3];
- var c = m[2] * transpose[0] + m[3] * transpose[2];
- var d = m[2] * transpose[1] + m[3] * transpose[3];
- // Solve the second degree polynomial to get roots.
- var first = (a + d) / 2;
- var second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2;
- var sx = first + second || 1;
- var sy = first - second || 1;
- // Scale values are the square roots of the eigenvalues.
- return [Math.sqrt(sx), Math.sqrt(sy)];
- };
- // Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2)
- // For coordinate systems whose origin lies in the bottom-left, this
- // means normalization to (BL,TR) ordering. For systems with origin in the
- // top-left, this means (TL,BR) ordering.
- Util.normalizeRect = function Util_normalizeRect(rect) {
- var r = rect.slice(0); // clone rect
- if (rect[0] > rect[2]) {
- r[0] = rect[2];
- r[2] = rect[0];
- }
- if (rect[1] > rect[3]) {
- r[1] = rect[3];
- r[3] = rect[1];
- }
- return r;
- };
- // Returns a rectangle [x1, y1, x2, y2] corresponding to the
- // intersection of rect1 and rect2. If no intersection, returns 'false'
- // The rectangle coordinates of rect1, rect2 should be [x1, y1, x2, y2]
- Util.intersect = function Util_intersect(rect1, rect2) {
- function compare(a, b) {
- return a - b;
- }
- // Order points along the axes
- var orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare),
- orderedY = [rect1[1], rect1[3], rect2[1], rect2[3]].sort(compare),
- result = [];
- rect1 = Util.normalizeRect(rect1);
- rect2 = Util.normalizeRect(rect2);
- // X: first and second points belong to different rectangles?
- if ((orderedX[0] === rect1[0] && orderedX[1] === rect2[0]) ||
- (orderedX[0] === rect2[0] && orderedX[1] === rect1[0])) {
- // Intersection must be between second and third points
- result[0] = orderedX[1];
- result[2] = orderedX[2];
- } else {
- return false;
- }
- // Y: first and second points belong to different rectangles?
- if ((orderedY[0] === rect1[1] && orderedY[1] === rect2[1]) ||
- (orderedY[0] === rect2[1] && orderedY[1] === rect1[1])) {
- // Intersection must be between second and third points
- result[1] = orderedY[1];
- result[3] = orderedY[2];
- } else {
- return false;
- }
- return result;
- };
- Util.sign = function Util_sign(num) {
- return num < 0 ? -1 : 1;
- };
- // TODO(mack): Rename appendToArray
- Util.concatenateToArray = function concatenateToArray(arr1, arr2) {
- Array.prototype.push.apply(arr1, arr2);
- };
- Util.prependToArray = function concatenateToArray(arr1, arr2) {
- Array.prototype.unshift.apply(arr1, arr2);
- };
- Util.extendObj = function extendObj(obj1, obj2) {
- for (var key in obj2) {
- obj1[key] = obj2[key];
- }
- };
- Util.getInheritableProperty = function Util_getInheritableProperty(dict,
- name) {
- while (dict && !dict.has(name)) {
- dict = dict.get('Parent');
- }
- if (!dict) {
- return null;
- }
- return dict.get(name);
- };
- Util.inherit = function Util_inherit(sub, base, prototype) {
- sub.prototype = Object.create(base.prototype);
- sub.prototype.constructor = sub;
- for (var prop in prototype) {
- sub.prototype[prop] = prototype[prop];
- }
- };
- Util.loadScript = function Util_loadScript(src, callback) {
- var script = document.createElement('script');
- var loaded = false;
- script.setAttribute('src', src);
- if (callback) {
- script.onload = function() {
- if (!loaded) {
- callback();
- }
- loaded = true;
- };
- }
- document.getElementsByTagName('head')[0].appendChild(script);
- };
- return Util;
- })();
- var PageViewport = PDFJS.PageViewport = (function PageViewportClosure() {
- function PageViewport(viewBox, scale, rotation, offsetX, offsetY, dontFlip) {
- this.viewBox = viewBox;
- this.scale = scale;
- this.rotation = rotation;
- this.offsetX = offsetX;
- this.offsetY = offsetY;
- // creating transform to convert pdf coordinate system to the normal
- // canvas like coordinates taking in account scale and rotation
- var centerX = (viewBox[2] + viewBox[0]) / 2;
- var centerY = (viewBox[3] + viewBox[1]) / 2;
- var rotateA, rotateB, rotateC, rotateD;
- rotation = rotation % 360;
- rotation = rotation < 0 ? rotation + 360 : rotation;
- switch (rotation) {
- case 180:
- rotateA = -1; rotateB = 0; rotateC = 0; rotateD = 1;
- break;
- case 90:
- rotateA = 0; rotateB = 1; rotateC = 1; rotateD = 0;
- break;
- case 270:
- rotateA = 0; rotateB = -1; rotateC = -1; rotateD = 0;
- break;
- //case 0:
- default:
- rotateA = 1; rotateB = 0; rotateC = 0; rotateD = -1;
- break;
- }
- if (dontFlip) {
- rotateC = -rotateC; rotateD = -rotateD;
- }
- var offsetCanvasX, offsetCanvasY;
- var width, height;
- if (rotateA === 0) {
- offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;
- offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;
- width = Math.abs(viewBox[3] - viewBox[1]) * scale;
- height = Math.abs(viewBox[2] - viewBox[0]) * scale;
- } else {
- offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX;
- offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY;
- width = Math.abs(viewBox[2] - viewBox[0]) * scale;
- height = Math.abs(viewBox[3] - viewBox[1]) * scale;
- }
- // creating transform for the following operations:
- // translate(-centerX, -centerY), rotate and flip vertically,
- // scale, and translate(offsetCanvasX, offsetCanvasY)
- this.transform = [
- rotateA * scale,
- rotateB * scale,
- rotateC * scale,
- rotateD * scale,
- offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY,
- offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY
- ];
- this.width = width;
- this.height = height;
- this.fontScale = scale;
- }
- PageViewport.prototype = {
- clone: function PageViewPort_clone(args) {
- args = args || {};
- var scale = 'scale' in args ? args.scale : this.scale;
- var rotation = 'rotation' in args ? args.rotation : this.rotation;
- return new PageViewport(this.viewBox.slice(), scale, rotation,
- this.offsetX, this.offsetY, args.dontFlip);
- },
- convertToViewportPoint: function PageViewport_convertToViewportPoint(x, y) {
- return Util.applyTransform([x, y], this.transform);
- },
- convertToViewportRectangle:
- function PageViewport_convertToViewportRectangle(rect) {
- var tl = Util.applyTransform([rect[0], rect[1]], this.transform);
- var br = Util.applyTransform([rect[2], rect[3]], this.transform);
- return [tl[0], tl[1], br[0], br[1]];
- },
- convertToPdfPoint: function PageViewport_convertToPdfPoint(x, y) {
- return Util.applyInverseTransform([x, y], this.transform);
- }
- };
- return PageViewport;
- })();
- var PDFStringTranslateTable = [
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014,
- 0x2013, 0x192, 0x2044, 0x2039, 0x203A, 0x2212, 0x2030, 0x201E, 0x201C,
- 0x201D, 0x2018, 0x2019, 0x201A, 0x2122, 0xFB01, 0xFB02, 0x141, 0x152, 0x160,
- 0x178, 0x17D, 0x131, 0x142, 0x153, 0x161, 0x17E, 0, 0x20AC
- ];
- function stringToPDFString(str) {
- var i, n = str.length, str2 = '';
- if (str[0] === '\xFE' && str[1] === '\xFF') {
- // UTF16BE BOM
- for (i = 2; i < n; i += 2)
- str2 += String.fromCharCode(
- (str.charCodeAt(i) << 8) | str.charCodeAt(i + 1));
- } else {
- for (i = 0; i < n; ++i) {
- var code = PDFStringTranslateTable[str.charCodeAt(i)];
- str2 += code ? String.fromCharCode(code) : str.charAt(i);
- }
- }
- return str2;
- }
- function stringToUTF8String(str) {
- return decodeURIComponent(escape(str));
- }
- function isEmptyObj(obj) {
- for (var key in obj) {
- return false;
- }
- return true;
- }
- function isBool(v) {
- return typeof v == 'boolean';
- }
- function isInt(v) {
- return typeof v == 'number' && ((v | 0) == v);
- }
- function isNum(v) {
- return typeof v == 'number';
- }
- function isString(v) {
- return typeof v == 'string';
- }
- function isNull(v) {
- return v === null;
- }
- function isName(v) {
- return v instanceof Name;
- }
- function isCmd(v, cmd) {
- return v instanceof Cmd && (!cmd || v.cmd == cmd);
- }
- function isDict(v, type) {
- if (!(v instanceof Dict)) {
- return false;
- }
- if (!type) {
- return true;
- }
- var dictType = v.get('Type');
- return isName(dictType) && dictType.name == type;
- }
- function isArray(v) {
- return v instanceof Array;
- }
- function isStream(v) {
- return typeof v == 'object' && v !== null && v !== undefined &&
- ('getBytes' in v);
- }
- function isArrayBuffer(v) {
- return typeof v == 'object' && v !== null && v !== undefined &&
- ('byteLength' in v);
- }
- function isRef(v) {
- return v instanceof Ref;
- }
- function isPDFFunction(v) {
- var fnDict;
- if (typeof v != 'object')
- return false;
- else if (isDict(v))
- fnDict = v;
- else if (isStream(v))
- fnDict = v.dict;
- else
- return false;
- return fnDict.has('FunctionType');
- }
- /**
- * Legacy support for PDFJS Promise implementation.
- * TODO remove eventually
- */
- var LegacyPromise = PDFJS.LegacyPromise = (function LegacyPromiseClosure() {
- return function LegacyPromise() {
- var resolve, reject;
- var promise = new Promise(function (resolve_, reject_) {
- resolve = resolve_;
- reject = reject_;
- });
- promise.resolve = resolve;
- promise.reject = reject;
- return promise;
- };
- })();
- /**
- * Polyfill for Promises:
- * The following promise implementation tries to generally implment the
- * Promise/A+ spec. Some notable differences from other promise libaries are:
- * - There currently isn't a seperate deferred and promise object.
- * - Unhandled rejections eventually show an error if they aren't handled.
- *
- * Based off of the work in:
- * https://bugzilla.mozilla.org/show_bug.cgi?id=810490
- */
- (function PromiseClosure() {
- if (globalScope.Promise) {
- // Promises existing in the DOM/Worker, checking presence of all/resolve
- if (typeof globalScope.Promise.all !== 'function') {
- globalScope.Promise.all = function (iterable) {
- var count = 0, results = [], resolve, reject;
- var promise = new globalScope.Promise(function (resolve_, reject_) {
- resolve = resolve_;
- reject = reject_;
- });
- iterable.forEach(function (p, i) {
- count++;
- p.then(function (result) {
- results[i] = result;
- count--;
- if (count === 0) {
- resolve(results);
- }
- }, reject);
- });
- if (count === 0) {
- resolve(results);
- }
- return promise;
- };
- }
- if (typeof globalScope.Promise.resolve !== 'function') {
- globalScope.Promise.resolve = function (x) {
- return new globalScope.Promise(function (resolve) { resolve(x); });
- };
- }
- return;
- }
- var STATUS_PENDING = 0;
- var STATUS_RESOLVED = 1;
- var STATUS_REJECTED = 2;
- // In an attempt to avoid silent exceptions, unhandled rejections are
- // tracked and if they aren't handled in a certain amount of time an
- // error is logged.
- var REJECTION_TIMEOUT = 500;
- var HandlerManager = {
- handlers: [],
- running: false,
- unhandledRejections: [],
- pendingRejectionCheck: false,
- scheduleHandlers: function scheduleHandlers(promise) {
- if (promise._status == STATUS_PENDING) {
- return;
- }
- this.handlers = this.handlers.concat(promise._handlers);
- promise._handlers = [];
- if (this.running) {
- return;
- }
- this.running = true;
- setTimeout(this.runHandlers.bind(this), 0);
- },
- runHandlers: function runHandlers() {
- var RUN_TIMEOUT = 1; // ms
- var timeoutAt = Date.now() + RUN_TIMEOUT;
- while (this.handlers.length > 0) {
- var handler = this.handlers.shift();
- var nextStatus = handler.thisPromise._status;
- var nextValue = handler.thisPromise._value;
- try {
- if (nextStatus === STATUS_RESOLVED) {
- if (typeof(handler.onResolve) == 'function') {
- nextValue = handler.onResolve(nextValue);
- }
- } else if (typeof(handler.onReject) === 'function') {
- nextValue = handler.onReject(nextValue);
- nextStatus = STATUS_RESOLVED;
- if (handler.thisPromise._unhandledRejection) {
- this.removeUnhandeledRejection(handler.thisPromise);
- }
- }
- } catch (ex) {
- nextStatus = STATUS_REJECTED;
- nextValue = ex;
- }
- handler.nextPromise._updateStatus(nextStatus, nextValue);
- if (Date.now() >= timeoutAt) {
- break;
- }
- }
- if (this.handlers.length > 0) {
- setTimeout(this.runHandlers.bind(this), 0);
- return;
- }
- this.running = false;
- },
- addUnhandledRejection: function addUnhandledRejection(promise) {
- this.unhandledRejections.push({
- promise: promise,
- time: Date.now()
- });
- this.scheduleRejectionCheck();
- },
- removeUnhandeledRejection: function removeUnhandeledRejection(promise) {
- promise._unhandledRejection = false;
- for (var i = 0; i < this.unhandledRejections.length; i++) {
- if (this.unhandledRejections[i].promise === promise) {
- this.unhandledRejections.splice(i);
- i--;
- }
- }
- },
- scheduleRejectionCheck: function scheduleRejectionCheck() {
- if (this.pendingRejectionCheck) {
- return;
- }
- this.pendingRejectionCheck = true;
- setTimeout(function rejectionCheck() {
- this.pendingRejectionCheck = false;
- var now = Date.now();
- for (var i = 0; i < this.unhandledRejections.length; i++) {
- if (now - this.unhandledRejections[i].time > REJECTION_TIMEOUT) {
- var unhandled = this.unhandledRejections[i].promise._value;
- var msg = 'Unhandled rejection: ' + unhandled;
- if (unhandled.stack) {
- msg += '\n' + unhandled.stack;
- }
- warn(msg);
- this.unhandledRejections.splice(i);
- i--;
- }
- }
- if (this.unhandledRejections.length) {
- this.scheduleRejectionCheck();
- }
- }.bind(this), REJECTION_TIMEOUT);
- }
- };
- function Promise(resolver) {
- this._status = STATUS_PENDING;
- this._handlers = [];
- resolver.call(this, this._resolve.bind(this), this._reject.bind(this));
- }
- /**
- * Builds a promise that is resolved when all the passed in promises are
- * resolved.
- * @param {array} array of data and/or promises to wait for.
- * @return {Promise} New dependant promise.
- */
- Promise.all = function Promise_all(promises) {
- var resolveAll, rejectAll;
- var deferred = new Promise(function (resolve, reject) {
- resolveAll = resolve;
- rejectAll = reject;
- });
- var unresolved = promises.length;
- var results = [];
- if (unresolved === 0) {
- resolveAll(results);
- return deferred;
- }
- function reject(reason) {
- if (deferred._status === STATUS_REJECTED) {
- return;
- }
- results = [];
- rejectAll(reason);
- }
- for (var i = 0, ii = promises.length; i < ii; ++i) {
- var promise = promises[i];
- var resolve = (function(i) {
- return function(value) {
- if (deferred._status === STATUS_REJECTED) {
- return;
- }
- results[i] = value;
- unresolved--;
- if (unresolved === 0)
- resolveAll(results);
- };
- })(i);
- if (Promise.isPromise(promise)) {
- promise.then(resolve, reject);
- } else {
- resolve(promise);
- }
- }
- return deferred;
- };
- /**
- * Checks if the value is likely a promise (has a 'then' function).
- * @return {boolean} true if x is thenable
- */
- Promise.isPromise = function Promise_isPromise(value) {
- return value && typeof value.then === 'function';
- };
- /**
- * Creates resolved promise
- * @param x resolve value
- * @returns {Promise}
- */
- Promise.resolve = function Promise_resolve(x) {
- return new Promise(function (resolve) { resolve(x); });
- };
- Promise.prototype = {
- _status: null,
- _value: null,
- _handlers: null,
- _unhandledRejection: null,
- _updateStatus: function Promise__updateStatus(status, value) {
- if (this._status === STATUS_RESOLVED ||
- this._status === STATUS_REJECTED) {
- return;
- }
- if (status == STATUS_RESOLVED &&
- Promise.isPromise(value)) {
- value.then(this._updateStatus.bind(this, STATUS_RESOLVED),
- this._updateStatus.bind(this, STATUS_REJECTED));
- return;
- }
- this._status = status;
- this._value = value;
- if (status === STATUS_REJECTED && this._handlers.length === 0) {
- this._unhandledRejection = true;
- HandlerManager.addUnhandledRejection(this);
- }
- HandlerManager.scheduleHandlers(this);
- },
- _resolve: function Promise_resolve(value) {
- this._updateStatus(STATUS_RESOLVED, value);
- },
- _reject: function Promise_reject(reason) {
- this._updateStatus(STATUS_REJECTED, reason);
- },
- then: function Promise_then(onResolve, onReject) {
- var nextPromise = new Promise(function (resolve, reject) {
- this.resolve = reject;
- this.reject = reject;
- });
- this._handlers.push({
- thisPromise: this,
- onResolve: onResolve,
- onReject: onReject,
- nextPromise: nextPromise
- });
- HandlerManager.scheduleHandlers(this);
- return nextPromise;
- }
- };
- globalScope.Promise = Promise;
- })();
- var StatTimer = (function StatTimerClosure() {
- function rpad(str, pad, length) {
- while (str.length < length)
- str += pad;
- return str;
- }
- function StatTimer() {
- this.started = {};
- this.times = [];
- this.enabled = true;
- }
- StatTimer.prototype = {
- time: function StatTimer_time(name) {
- if (!this.enabled)
- return;
- if (name in this.started)
- warn('Timer is already running for ' + name);
- this.started[name] = Date.now();
- },
- timeEnd: function StatTimer_timeEnd(name) {
- if (!this.enabled)
- return;
- if (!(name in this.started))
- warn('Timer has not been started for ' + name);
- this.times.push({
- 'name': name,
- 'start': this.started[name],
- 'end': Date.now()
- });
- // Remove timer from started so it can be called again.
- delete this.started[name];
- },
- toString: function StatTimer_toString() {
- var times = this.times;
- var out = '';
- // Find the longest name for padding purposes.
- var longest = 0;
- for (var i = 0, ii = times.length; i < ii; ++i) {
- var name = times[i]['name'];
- if (name.length > longest)
- longest = name.length;
- }
- for (var i = 0, ii = times.length; i < ii; ++i) {
- var span = times[i];
- var duration = span.end - span.start;
- out += rpad(span['name'], ' ', longest) + ' ' + duration + 'ms\n';
- }
- return out;
- }
- };
- return StatTimer;
- })();
- PDFJS.createBlob = function createBlob(data, contentType) {
- if (typeof Blob !== 'undefined')
- return new Blob([data], { type: contentType });
- // Blob builder is deprecated in FF14 and removed in FF18.
- var bb = new MozBlobBuilder();
- bb.append(data);
- return bb.getBlob(contentType);
- };
- PDFJS.createObjectURL = (function createObjectURLClosure() {
- // Blob/createObjectURL is not available, falling back to data schema.
- var digits =
- 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
- return function createObjectURL(data, contentType) {
- if (!PDFJS.disableCreateObjectURL &&
- typeof URL !== 'undefined' && URL.createObjectURL) {
- var blob = PDFJS.createBlob(data, contentType);
- return URL.createObjectURL(blob);
- }
- var buffer = 'data:' + contentType + ';base64,';
- for (var i = 0, ii = data.length; i < ii; i += 3) {
- var b1 = data[i] & 0xFF;
- var b2 = data[i + 1] & 0xFF;
- var b3 = data[i + 2] & 0xFF;
- var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4);
- var d3 = i + 1 < ii ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64;
- var d4 = i + 2 < ii ? (b3 & 0x3F) : 64;
- buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4];
- }
- return buffer;
- };
- })();
- function MessageHandler(name, comObj) {
- this.name = name;
- this.comObj = comObj;
- this.callbackIndex = 1;
- this.postMessageTransfers = true;
- var callbacks = this.callbacks = {};
- var ah = this.actionHandler = {};
- ah['console_log'] = [function ahConsoleLog(data) {
- console.log.apply(console, data);
- }];
- ah['console_error'] = [function ahConsoleError(data) {
- console.error.apply(console, data);
- }];
- ah['_unsupported_feature'] = [function ah_unsupportedFeature(data) {
- UnsupportedManager.notify(data);
- }];
- comObj.onmessage = function messageHandlerComObjOnMessage(event) {
- var data = event.data;
- if (data.isReply) {
- var callbackId = data.callbackId;
- if (data.callbackId in callbacks) {
- var callback = callbacks[callbackId];
- delete callbacks[callbackId];
- callback(data.data);
- } else {
- error('Cannot resolve callback ' + callbackId);
- }
- } else if (data.action in ah) {
- var action = ah[data.action];
- if (data.callbackId) {
- var deferred = {};
- var promise = new Promise(function (resolve, reject) {
- deferred.resolve = resolve;
- deferred.reject = reject;
- });
- deferred.promise = promise;
- promise.then(function(resolvedData) {
- comObj.postMessage({
- isReply: true,
- callbackId: data.callbackId,
- data: resolvedData
- });
- });
- action[0].call(action[1], data.data, deferred);
- } else {
- action[0].call(action[1], data.data);
- }
- } else {
- error('Unkown action from worker: ' + data.action);
- }
- };
- }
- MessageHandler.prototype = {
- on: function messageHandlerOn(actionName, handler, scope) {
- var ah = this.actionHandler;
- if (ah[actionName]) {
- error('There is already an actionName called "' + actionName + '"');
- }
- ah[actionName] = [handler, scope];
- },
- /**
- * Sends a message to the comObj to invoke the action with the supplied data.
- * @param {String} actionName Action to call.
- * @param {JSON} data JSON data to send.
- * @param {function} [callback] Optional callback that will handle a reply.
- * @param {Array} [transfers] Optional list of transfers/ArrayBuffers
- */
- send: function messageHandlerSend(actionName, data, callback, transfers) {
- var message = {
- action: actionName,
- data: data
- };
- if (callback) {
- var callbackId = this.callbackIndex++;
- this.callbacks[callbackId] = callback;
- message.callbackId = callbackId;
- }
- if (transfers && this.postMessageTransfers) {
- this.comObj.postMessage(message, transfers);
- } else {
- this.comObj.postMessage(message);
- }
- }
- };
- function loadJpegStream(id, imageUrl, objs) {
- var img = new Image();
- img.onload = (function loadJpegStream_onloadClosure() {
- objs.resolve(id, img);
- });
- img.src = imageUrl;
- }
- var ColorSpace = (function ColorSpaceClosure() {
- // Constructor should define this.numComps, this.defaultColor, this.name
- function ColorSpace() {
- error('should not call ColorSpace constructor');
- }
- ColorSpace.prototype = {
- /**
- * Converts the color value to the RGB color. The color components are
- * located in the src array starting from the srcOffset. Returns the array
- * of the rgb components, each value ranging from [0,255].
- */
- getRgb: function ColorSpace_getRgb(src, srcOffset) {
- error('Should not call ColorSpace.getRgb');
- },
- /**
- * Converts the color value to the RGB color, similar to the getRgb method.
- * The result placed into the dest array starting from the destOffset.
- */
- getRgbItem: function ColorSpace_getRgb(src, srcOffset, dest, destOffset) {
- error('Should not call ColorSpace.getRgbItem');
- },
- /**
- * Converts the specified number of the color values to the RGB colors.
- * The colors are located in the src array starting from the srcOffset.
- * The result is placed into the dest array starting from the destOffset.
- * The src array items shall be in [0,2^bits) range, the dest array items
- * will be in [0,255] range. alpha01 indicates how many alpha components
- * there are in the dest array; it will be either 0 (RGB array) or 1 (RGBA
- * array).
- */
- getRgbBuffer: function ColorSpace_getRgbBuffer(src, srcOffset, count,
- dest, destOffset, bits,
- alpha01) {
- error('Should not call ColorSpace.getRgbBuffer');
- },
- /**
- * Determines the number of bytes required to store the result of the
- * conversion done by the getRgbBuffer method. As in getRgbBuffer,
- * |alpha01| is either 0 (RGB output) or 1 (RGBA output).
- */
- getOutputLength: function ColorSpace_getOutputLength(inputLength,
- alpha01) {
- error('Should not call ColorSpace.getOutputLength');
- },
- /**
- * Returns true if source data will be equal the result/output data.
- */
- isPassthrough: function ColorSpace_isPassthrough(bits) {
- return false;
- },
- /**
- * Fills in the RGB colors in an RGBA buffer.
- */
- fillRgb: function ColorSpace_fillRgb(rgbaBuf, originalWidth,
- originalHeight, width, height,
- actualHeight, bpc, comps) {
- var count = originalWidth * originalHeight;
- var rgbBuf = null;
- var numComponentColors = 1 << bpc;
- var needsResizing = originalHeight != height || originalWidth != width;
- if (this.isPassthrough(bpc)) {
- rgbBuf = comps;
- } else if (this.numComps === 1 && count > numComponentColors &&
- this.name !== 'DeviceGray' && this.name !== 'DeviceRGB') {
- // Optimization: create a color map when there is just one component and
- // we are converting more colors than the size of the color map. We
- // don't build the map if the colorspace is gray or rgb since those
- // methods are faster than building a map. This mainly offers big speed
- // ups for indexed and alternate colorspaces.
- //
- // TODO it may be worth while to cache the color map. While running
- // testing I never hit a cache so I will leave that out for now (perhaps
- // we are reparsing colorspaces too much?).
- var allColors = bpc <= 8 ? new Uint8Array(numComponentColors) :
- new Uint16Array(numComponentColors);
- for (var i = 0; i < numComponentColors; i++) {
- allColors[i] = i;
- }
- var colorMap = new Uint8Array(numComponentColors * 3);
- this.getRgbBuffer(allColors, 0, numComponentColors, colorMap, 0, bpc,
- /* alpha01 = */ 0);
- if (!needsResizing) {
- // Fill in the RGB values directly into |rgbaBuf|.
- var rgbaPos = 0;
- for (var i = 0; i < count; ++i) {
- var key = comps[i] * 3;
- rgbaBuf[rgbaPos++] = colorMap[key];
- rgbaBuf[rgbaPos++] = colorMap[key + 1];
- rgbaBuf[rgbaPos++] = colorMap[key + 2];
- rgbaPos++;
- }
- } else {
- rgbBuf = new Uint8Array(count * 3);
- var rgbPos = 0;
- for (var i = 0; i < count; ++i) {
- var key = comps[i] * 3;
- rgbBuf[rgbPos++] = colorMap[key];
- rgbBuf[rgbPos++] = colorMap[key + 1];
- rgbBuf[rgbPos++] = colorMap[key + 2];
- }
- }
- } else {
- if (!needsResizing) {
- // Fill in the RGB values directly into |rgbaBuf|.
- this.getRgbBuffer(comps, 0, width * actualHeight, rgbaBuf, 0, bpc,
- /* alpha01 = */ 1);
- } else {
- rgbBuf = new Uint8Array(count * 3);
- this.getRgbBuffer(comps, 0, count, rgbBuf, 0, bpc,
- /* alpha01 = */ 0);
- }
- }
- if (rgbBuf) {
- if (needsResizing) {
- rgbBuf = PDFImage.resize(rgbBuf, bpc, 3, originalWidth,
- originalHeight, width, height);
- }
- var rgbPos = 0;
- var actualLength = width * actualHeight * 4;
- for (var i = 0; i < actualLength; i += 4) {
- rgbaBuf[i] = rgbBuf[rgbPos++];
- rgbaBuf[i + 1] = rgbBuf[rgbPos++];
- rgbaBuf[i + 2] = rgbBuf[rgbPos++];
- }
- }
- },
- /**
- * True if the colorspace has components in the default range of [0, 1].
- * This should be true for all colorspaces except for lab color spaces
- * which are [0,100], [-128, 127], [-128, 127].
- */
- usesZeroToOneRange: true
- };
- ColorSpace.parse = function ColorSpace_parse(cs, xref, res) {
- var IR = ColorSpace.parseToIR(cs, xref, res);
- if (IR instanceof AlternateCS)
- return IR;
- return ColorSpace.fromIR(IR);
- };
- ColorSpace.fromIR = function ColorSpace_fromIR(IR) {
- var name = isArray(IR) ? IR[0] : IR;
- switch (name) {
- case 'DeviceGrayCS':
- return this.singletons.gray;
- case 'DeviceRgbCS':
- return this.singletons.rgb;
- case 'DeviceCmykCS':
- return this.singletons.cmyk;
- case 'CalGrayCS':
- var whitePoint = IR[1].WhitePoint;
- var blackPoint = IR[1].BlackPoint;
- var gamma = IR[1].Gamma;
- return new CalGrayCS(whitePoint, blackPoint, gamma);
- case 'PatternCS':
- var basePatternCS = IR[1];
- if (basePatternCS)
- basePatternCS = ColorSpace.fromIR(basePatternCS);
- return new PatternCS(basePatternCS);
- case 'IndexedCS':
- var baseIndexedCS = IR[1];
- var hiVal = IR[2];
- var lookup = IR[3];
- return new IndexedCS(ColorSpace.fromIR(baseIndexedCS), hiVal, lookup);
- case 'AlternateCS':
- var numComps = IR[1];
- var alt = IR[2];
- var tintFnIR = IR[3];
- return new AlternateCS(numComps, ColorSpace.fromIR(alt),
- PDFFunction.fromIR(tintFnIR));
- case 'LabCS':
- var whitePoint = IR[1].WhitePoint;
- var blackPoint = IR[1].BlackPoint;
- var range = IR[1].Range;
- return new LabCS(whitePoint, blackPoint, range);
- default:
- error('Unkown name ' + name);
- }
- return null;
- };
- ColorSpace.parseToIR = function ColorSpace_parseToIR(cs, xref, res) {
- if (isName(cs)) {
- var colorSpaces = res.get('ColorSpace');
- if (isDict(colorSpaces)) {
- var refcs = colorSpaces.get(cs.name);
- if (refcs)
- cs = refcs;
- }
- }
- cs = xref.fetchIfRef(cs);
- var mode;
- if (isName(cs)) {
- mode = cs.name;
- this.mode = mode;
- switch (mode) {
- case 'DeviceGray':
- case 'G':
- return 'DeviceGrayCS';
- case 'DeviceRGB':
- case 'RGB':
- return 'DeviceRgbCS';
- case 'DeviceCMYK':
- case 'CMYK':
- return 'DeviceCmykCS';
- case 'Pattern':
- return ['PatternCS', null];
- default:
- error('unrecognized colorspace ' + mode);
- }
- } else if (isArray(cs)) {
- mode = cs[0].name;
- this.mode = mode;
- switch (mode) {
- case 'DeviceGray':
- case 'G':
- return 'DeviceGrayCS';
- case 'DeviceRGB':
- case 'RGB':
- return 'DeviceRgbCS';
- case 'DeviceCMYK':
- case 'CMYK':
- return 'DeviceCmykCS';
- case 'CalGray':
- var params = cs[1].getAll();
- return ['CalGrayCS', params];
- case 'CalRGB':
- return 'DeviceRgbCS';
- case 'ICCBased':
- var stream = xref.fetchIfRef(cs[1]);
- var dict = stream.dict;
- var numComps = dict.get('N');
- if (numComps == 1)
- return 'DeviceGrayCS';
- if (numComps == 3)
- return 'DeviceRgbCS';
- if (numComps == 4)
- return 'DeviceCmykCS';
- break;
- case 'Pattern':
- var basePatternCS = cs[1];
- if (basePatternCS)
- basePatternCS = ColorSpace.parseToIR(basePatternCS, xref, res);
- return ['PatternCS', basePatternCS];
- case 'Indexed':
- case 'I':
- var baseIndexedCS = ColorSpace.parseToIR(cs[1], xref, res);
- var hiVal = cs[2] + 1;
- var lookup = xref.fetchIfRef(cs[3]);
- if (isStream(lookup)) {
- lookup = lookup.getBytes();
- }
- return ['IndexedCS', baseIndexedCS, hiVal, lookup];
- case 'Separation':
- case 'DeviceN':
- var name = cs[1];
- var numComps = 1;
- if (isName(name))
- numComps = 1;
- else if (isArray(name))
- numComps = name.length;
- var alt = ColorSpace.parseToIR(cs[2], xref, res);
- var tintFnIR = PDFFunction.getIR(xref, xref.fetchIfRef(cs[3]));
- return ['AlternateCS', numComps, alt, tintFnIR];
- case 'Lab':
- var params = cs[1].getAll();
- return ['LabCS', params];
- default:
- error('unimplemented color space object "' + mode + '"');
- }
- } else {
- error('unrecognized color space object: "' + cs + '"');
- }
- return null;
- };
- /**
- * Checks if a decode map matches the default decode map for a color space.
- * This handles the general decode maps where there are two values per
- * component. e.g. [0, 1, 0, 1, 0, 1] for a RGB color.
- * This does not handle Lab, Indexed, or Pattern decode maps since they are
- * slightly different.
- * @param {Array} decode Decode map (usually from an image).
- * @param {Number} n Number of components the color space has.
- */
- ColorSpace.isDefaultDecode = function ColorSpace_isDefaultDecode(decode, n) {
- if (!decode)
- return true;
- if (n * 2 !== decode.length) {
- warn('The decode map is not the correct length');
- return true;
- }
- for (var i = 0, ii = decode.length; i < ii; i += 2) {
- if (decode[i] !== 0 || decode[i + 1] != 1)
- return false;
- }
- return true;
- };
- ColorSpace.singletons = {
- get gray() {
- return shadow(this, 'gray', new DeviceGrayCS());
- },
- get rgb() {
- return shadow(this, 'rgb', new DeviceRgbCS());
- },
- get cmyk() {
- return shadow(this, 'cmyk', new DeviceCmykCS());
- }
- };
- return ColorSpace;
- })();
- /**
- * Alternate color space handles both Separation and DeviceN color spaces. A
- * Separation color space is actually just a DeviceN with one color component.
- * Both color spaces use a tinting function to convert colors to a base color
- * space.
- */
- var AlternateCS = (function AlternateCSClosure() {
- function AlternateCS(numComps, base, tintFn) {
- this.name = 'Alternate';
- this.numComps = numComps;
- this.defaultColor = new Float32Array(numComps);
- for (var i = 0; i < numComps; ++i) {
- this.defaultColor[i] = 1;
- }
- this.base = base;
- this.tintFn = tintFn;
- }
- AlternateCS.prototype = {
- getRgb: function AlternateCS_getRgb(src, srcOffset) {
- var rgb = new Uint8Array(3);
- this.getRgbItem(src, srcOffset, rgb, 0);
- return rgb;
- },
- getRgbItem: function AlternateCS_getRgbItem(src, srcOffset,
- dest, destOffset) {
- var baseNumComps = this.base.numComps;
- var input = 'subarray' in src ?
- src.subarray(srcOffset, srcOffset + this.numComps) :
- Array.prototype.slice.call(src, srcOffset, srcOffset + this.numComps);
- var tinted = this.tintFn(input);
- this.base.getRgbItem(tinted, 0, dest, destOffset);
- },
- getRgbBuffer: function AlternateCS_getRgbBuffer(src, srcOffset, count,
- dest, destOffset, bits,
- alpha01) {
- var tintFn = this.tintFn;
- var base = this.base;
- var scale = 1 / ((1 << bits) - 1);
- var baseNumComps = base.numComps;
- var usesZeroToOneRange = base.usesZeroToOneRange;
- var isPassthrough = (base.isPassthrough(8) || !usesZeroToOneRange) &&
- alpha01 === 0;
- var pos = isPassthrough ? destOffset : 0;
- var baseBuf = isPassthrough ? dest : new Uint8Array(baseNumComps * count);
- var numComps = this.numComps;
- var scaled = new Float32Array(numComps);
- for (var i = 0; i < count; i++) {
- for (var j = 0; j < numComps; j++) {
- scaled[j] = src[srcOffset++] * scale;
- }
- var tinted = tintFn(scaled);
- if (usesZeroToOneRange) {
- for (var j = 0; j < baseNumComps; j++) {
- baseBuf[pos++] = tinted[j] * 255;
- }
- } else {
- base.getRgbItem(tinted, 0, baseBuf, pos);
- pos += baseNumComps;
- }
- }
- if (!isPassthrough) {
- base.getRgbBuffer(baseBuf, 0, count, dest, destOffset, 8, alpha01);
- }
- },
- getOutputLength: function AlternateCS_getOutputLength(inputLength,
- alpha01) {
- return this.base.getOutputLength(inputLength *
- this.base.numComps / this.numComps,
- alpha01);
- },
- isPassthrough: ColorSpace.prototype.isPassthrough,
- fillRgb: ColorSpace.prototype.fillRgb,
- isDefaultDecode: function AlternateCS_isDefaultDecode(decodeMap) {
- return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
- },
- usesZeroToOneRange: true
- };
- return AlternateCS;
- })();
- var PatternCS = (function PatternCSClosure() {
- function PatternCS(baseCS) {
- this.name = 'Pattern';
- this.base = baseCS;
- }
- PatternCS.prototype = {};
- return PatternCS;
- })();
- var IndexedCS = (function IndexedCSClosure() {
- function IndexedCS(base, highVal, lookup) {
- this.name = 'Indexed';
- this.numComps = 1;
- this.defaultColor = new Uint8Array([0]);
- this.base = base;
- this.highVal = highVal;
- var baseNumComps = base.numComps;
- var length = baseNumComps * highVal;
- var lookupArray;
- if (isStream(lookup)) {
- lookupArray = new Uint8Array(length);
- var bytes = lookup.getBytes(length);
- lookupArray.set(bytes);
- } else if (isString(lookup)) {
- lookupArray = new Uint8Array(length);
- for (var i = 0; i < length; ++i)
- lookupArray[i] = lookup.charCodeAt(i);
- } else if (lookup instanceof Uint8Array || lookup instanceof Array) {
- lookupArray = lookup;
- } else {
- error('Unrecognized lookup table: ' + lookup);
- }
- this.lookup = lookupArray;
- }
- IndexedCS.prototype = {
- getRgb: function IndexedCS_getRgb(src, srcOffset) {
- var numComps = this.base.numComps;
- var start = src[srcOffset] * numComps;
- return this.base.getRgb(this.lookup, start);
- },
- getRgbItem: function IndexedCS_getRgbItem(src, srcOffset,
- dest, destOffset) {
- var numComps = this.base.numComps;
- var start = src[srcOffset] * numComps;
- this.base.getRgbItem(this.lookup, start, dest, destOffset);
- },
- getRgbBuffer: function IndexedCS_getRgbBuffer(src, srcOffset, count,
- dest, destOffset, bits,
- alpha01) {
- var base = this.base;
- var numComps = base.numComps;
- var outputDelta = base.getOutputLength(numComps, alpha01);
- var lookup = this.lookup;
- for (var i = 0; i < count; ++i) {
- var lookupPos = src[srcOffset++] * numComps;
- base.getRgbBuffer(lookup, lookupPos, 1, dest, destOffset, 8, alpha01);
- destOffset += outputDelta;
- }
- },
- getOutputLength: function IndexedCS_getOutputLength(inputLength, alpha01) {
- return this.base.getOutputLength(inputLength * this.base.numComps,
- alpha01);
- },
- isPassthrough: ColorSpace.prototype.isPassthrough,
- fillRgb: ColorSpace.prototype.fillRgb,
- isDefaultDecode: function IndexedCS_isDefaultDecode(decodeMap) {
- // indexed color maps shouldn't be changed
- return true;
- },
- usesZeroToOneRange: true
- };
- return IndexedCS;
- })();
- var DeviceGrayCS = (function DeviceGrayCSClosure() {
- function DeviceGrayCS() {
- this.name = 'DeviceGray';
- this.numComps = 1;
- this.defaultColor = new Float32Array([0]);
- }
- DeviceGrayCS.prototype = {
- getRgb: function DeviceGrayCS_getRgb(src, srcOffset) {
- var rgb = new Uint8Array(3);
- this.getRgbItem(src, srcOffset, rgb, 0);
- return rgb;
- },
- getRgbItem: function DeviceGrayCS_getRgbItem(src, srcOffset,
- dest, destOffset) {
- var c = (src[srcOffset] * 255) | 0;
- c = c < 0 ? 0 : c > 255 ? 255 : c;
- dest[destOffset] = dest[destOffset + 1] = dest[destOffset + 2] = c;
- },
- getRgbBuffer: function DeviceGrayCS_getRgbBuffer(src, srcOffset, count,
- dest, destOffset, bits,
- alpha01) {
- var scale = 255 / ((1 << bits) - 1);
- var j = srcOffset, q = destOffset;
- for (var i = 0; i < count; ++i) {
- var c = (scale * src[j++]) | 0;
- dest[q++] = c;
- dest[q++] = c;
- dest[q++] = c;
- q += alpha01;
- }
- },
- getOutputLength: function DeviceGrayCS_getOutputLength(inputLength,
- alpha01) {
- return inputLength * (3 + alpha01);
- },
- isPassthrough: ColorSpace.prototype.isPassthrough,
- fillRgb: ColorSpace.prototype.fillRgb,
- isDefaultDecode: function DeviceGrayCS_isDefaultDecode(decodeMap) {
- return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
- },
- usesZeroToOneRange: true
- };
- return DeviceGrayCS;
- })();
- var DeviceRgbCS = (function DeviceRgbCSClosure() {
- function DeviceRgbCS() {
- this.name = 'DeviceRGB';
- this.numComps = 3;
- this.defaultColor = new Float32Array([0, 0, 0]);
- }
- DeviceRgbCS.prototype = {
- getRgb: function DeviceRgbCS_getRgb(src, srcOffset) {
- var rgb = new Uint8Array(3);
- this.getRgbItem(src, srcOffset, rgb, 0);
- return rgb;
- },
- getRgbItem: function DeviceRgbCS_getRgbItem(src, srcOffset,
- dest, destOffset) {
- var r = (src[srcOffset] * 255) | 0;
- var g = (src[srcOffset + 1] * 255) | 0;
- var b = (src[srcOffset + 2] * 255) | 0;
- dest[destOffset] = r < 0 ? 0 : r > 255 ? 255 : r;
- dest[destOffset + 1] = g < 0 ? 0 : g > 255 ? 255 : g;
- dest[destOffset + 2] = b < 0 ? 0 : b > 255 ? 255 : b;
- },
- getRgbBuffer: function DeviceRgbCS_getRgbBuffer(src, srcOffset, count,
- dest, destOffset, bits,
- alpha01) {
- if (bits === 8 && alpha01 === 0) {
- dest.set(src.subarray(srcOffset, srcOffset + count * 3), destOffset);
- return;
- }
- var scale = 255 / ((1 << bits) - 1);
- var j = srcOffset, q = destOffset;
- for (var i = 0; i < count; ++i) {
- dest[q++] = (scale * src[j++]) | 0;
- dest[q++] = (scale * src[j++]) | 0;
- dest[q++] = (scale * src[j++]) | 0;
- q += alpha01;
- }
- },
- getOutputLength: function DeviceRgbCS_getOutputLength(inputLength,
- alpha01) {
- return (inputLength * (3 + alpha01) / 3) | 0;
- },
- isPassthrough: function DeviceRgbCS_isPassthrough(bits) {
- return bits == 8;
- },
- fillRgb: ColorSpace.prototype.fillRgb,
- isDefaultDecode: function DeviceRgbCS_isDefaultDecode(decodeMap) {
- return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
- },
- usesZeroToOneRange: true
- };
- return DeviceRgbCS;
- })();
- var DeviceCmykCS = (function DeviceCmykCSClosure() {
- // The coefficients below was found using numerical analysis: the method of
- // steepest descent for the sum((f_i - color_value_i)^2) for r/g/b colors,
- // where color_value is the tabular value from the table of sampled RGB colors
- // from CMYK US Web Coated (SWOP) colorspace, and f_i is the corresponding
- // CMYK color conversion using the estimation below:
- // f(A, B,.. N) = Acc+Bcm+Ccy+Dck+c+Fmm+Gmy+Hmk+Im+Jyy+Kyk+Ly+Mkk+Nk+255
- function convertToRgb(src, srcOffset, srcScale, dest, destOffset) {
- var c = src[srcOffset + 0] * srcScale;
- var m = src[srcOffset + 1] * srcScale;
- var y = src[srcOffset + 2] * srcScale;
- var k = src[srcOffset + 3] * srcScale;
- var r =
- c * (-4.387332384609988 * c + 54.48615194189176 * m +
- 18.82290502165302 * y + 212.25662451639585 * k +
- -285.2331026137004) +
- m * (1.7149763477362134 * m - 5.6096736904047315 * y +
- -17.873870861415444 * k - 5.497006427196366) +
- y * (-2.5217340131683033 * y - 21.248923337353073 * k +
- 17.5119270841813) +
- k * (-21.86122147463605 * k - 189.48180835922747) + 255;
- var g =
- c * (8.841041422036149 * c + 60.118027045597366 * m +
- 6.871425592049007 * y + 31.159100130055922 * k +
- -79.2970844816548) +
- m * (-15.310361306967817 * m + 17.575251261109482 * y +
- 131.35250912493976 * k - 190.9453302588951) +
- y * (4.444339102852739 * y + 9.8632861493405 * k - 24.86741582555878) +
- k * (-20.737325471181034 * k - 187.80453709719578) + 255;
- var b =
- c * (0.8842522430003296 * c + 8.078677503112928 * m +
- 30.89978309703729 * y - 0.23883238689178934 * k +
- -14.183576799673286) +
- m * (10.49593273432072 * m + 63.02378494754052 * y +
- 50.606957656360734 * k - 112.23884253719248) +
- y * (0.03296041114873217 * y + 115.60384449646641 * k +
- -193.58209356861505) +
- k * (-22.33816807309886 * k - 180.12613974708367) + 255;
- dest[destOffset] = r > 255 ? 255 : r < 0 ? 0 : r;
- dest[destOffset + 1] = g > 255 ? 255 : g < 0 ? 0 : g;
- dest[destOffset + 2] = b > 255 ? 255 : b < 0 ? 0 : b;
- }
- function DeviceCmykCS() {
- this.name = 'DeviceCMYK';
- this.numComps = 4;
- this.defaultColor = new Float32Array([0, 0, 0, 1]);
- }
- DeviceCmykCS.prototype = {
- getRgb: function DeviceCmykCS_getRgb(src, srcOffset) {
- var rgb = new Uint8Array(3);
- convertToRgb(src, srcOffset, 1, rgb, 0);
- return rgb;
- },
- getRgbItem: function DeviceCmykCS_getRgbItem(src, srcOffset,
- dest, destOffset) {
- convertToRgb(src, srcOffset, 1, dest, destOffset);
- },
- getRgbBuffer: function DeviceCmykCS_getRgbBuffer(src, srcOffset, count,
- dest, destOffset, bits,
- alpha01) {
- var scale = 1 / ((1 << bits) - 1);
- for (var i = 0; i < count; i++) {
- convertToRgb(src, srcOffset, scale, dest, destOffset);
- srcOffset += 4;
- destOffset += 3 + alpha01;
- }
- },
- getOutputLength: function DeviceCmykCS_getOutputLength(inputLength,
- alpha01) {
- return (inputLength / 4 * (3 + alpha01)) | 0;
- },
- isPassthrough: ColorSpace.prototype.isPassthrough,
- fillRgb: ColorSpace.prototype.fillRgb,
- isDefaultDecode: function DeviceCmykCS_isDefaultDecode(decodeMap) {
- return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
- },
- usesZeroToOneRange: true
- };
- return DeviceCmykCS;
- })();
- //
- // CalGrayCS: Based on "PDF Reference, Sixth Ed", p.245
- //
- var CalGrayCS = (function CalGrayCSClosure() {
- function CalGrayCS(whitePoint, blackPoint, gamma) {
- this.name = 'CalGray';
- this.numComps = 1;
- this.defaultColor = new Float32Array([0]);
- if (!whitePoint) {
- error('WhitePoint missing - required for color space CalGray');
- }
- blackPoint = blackPoint || [0, 0, 0];
- gamma = gamma || 1;
- // Translate arguments to spec variables.
- this.XW = whitePoint[0];
- this.YW = whitePoint[1];
- this.ZW = whitePoint[2];
- this.XB = blackPoint[0];
- this.YB = blackPoint[1];
- this.ZB = blackPoint[2];
- this.G = gamma;
- // Validate variables as per spec.
- if (this.XW < 0 || this.ZW < 0 || this.YW !== 1) {
- error('Invalid WhitePoint components for ' + this.name +
- ', no fallback available');
- }
- if (this.XB < 0 || this.YB < 0 || this.ZB < 0) {
- info('Invalid BlackPoint for ' + this.name + ', falling back to default');
- this.XB = this.YB = this.ZB = 0;
- }
- if (this.XB !== 0 || this.YB !== 0 || this.ZB !== 0) {
- warn(this.name + ', BlackPoint: XB: ' + this.XB + ', YB: ' + this.YB +
- ', ZB: ' + this.ZB + ', only default values are supported.');
- }
- if (this.G < 1) {
- info('Invalid Gamma: ' + this.G + ' for ' + this.name +
- ', falling back to default');
- this.G = 1;
- }
- }
- function convertToRgb(cs, src, srcOffset, dest, destOffset, scale) {
- // A represents a gray component of a calibrated gray space.
- // A <---> AG in the spec
- var A = src[srcOffset] * scale;
- var AG = Math.pow(A, cs.G);
- // Computes intermediate variables M, L, N as per spec.
- // Except if other than default BlackPoint values are used.
- var M = cs.XW * AG;
- var L = cs.YW * AG;
- var N = cs.ZW * AG;
- // Decode XYZ, as per spec.
- var X = M;
- var Y = L;
- var Z = N;
- // http://www.poynton.com/notes/colour_and_gamma/ColorFAQ.html, Ch 4.
- // This yields values in range [0, 100].
- var Lstar = Math.max(116 * Math.pow(Y, 1 / 3) - 16, 0);
- // Convert values to rgb range [0, 255].
- dest[destOffset] = Lstar * 255 / 100;
- dest[destOffset + 1] = Lstar * 255 / 100;
- dest[destOffset + 2] = Lstar * 255 / 100;
- }
- CalGrayCS.prototype = {
- getRgb: function CalGrayCS_getRgb(src, srcOffset) {
- var rgb = new Uint8Array(3);
- this.getRgbItem(src, srcOffset, rgb, 0);
- return rgb;
- },
- getRgbItem: function CalGrayCS_getRgbItem(src, srcOffset,
- dest, destOffset) {
- convertToRgb(this, src, srcOffset, dest, destOffset, 1);
- },
- getRgbBuffer: function CalGrayCS_getRgbBuffer(src, srcOffset, count,
- dest, destOffset, bits,
- alpha01) {
- var scale = 1 / ((1 << bits) - 1);
- for (var i = 0; i < count; ++i) {
- convertToRgb(this, src, srcOffset, dest, destOffset, scale);
- srcOffset += 1;
- destOffset += 3 + alpha01;
- }
- },
- getOutputLength: function CalGrayCS_getOutputLength(inputLength, alpha01) {
- return inputLength * (3 + alpha01);
- },
- isPassthrough: ColorSpace.prototype.isPassthrough,
- fillRgb: ColorSpace.prototype.fillRgb,
- isDefaultDecode: function CalGrayCS_isDefaultDecode(decodeMap) {
- return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
- },
- usesZeroToOneRange: true
- };
- return CalGrayCS;
- })();
- //
- // LabCS: Based on "PDF Reference, Sixth Ed", p.250
- //
- var LabCS = (function LabCSClosure() {
- function LabCS(whitePoint, blackPoint, range) {
- this.name = 'Lab';
- this.numComps = 3;
- this.defaultColor = new Float32Array([0, 0, 0]);
- if (!whitePoint)
- error('WhitePoint missing - required for color space Lab');
- blackPoint = blackPoint || [0, 0, 0];
- range = range || [-100, 100, -100, 100];
- // Translate args to spec variables
- this.XW = whitePoint[0];
- this.YW = whitePoint[1];
- this.ZW = whitePoint[2];
- this.amin = range[0];
- this.amax = range[1];
- this.bmin = range[2];
- this.bmax = range[3];
- // These are here just for completeness - the spec doesn't offer any
- // formulas that use BlackPoint in Lab
- this.XB = blackPoint[0];
- this.YB = blackPoint[1];
- this.ZB = blackPoint[2];
- // Validate vars as per spec
- if (this.XW < 0 || this.ZW < 0 || this.YW !== 1)
- error('Invalid WhitePoint components, no fallback available');
- if (this.XB < 0 || this.YB < 0 || this.ZB < 0) {
- info('Invalid BlackPoint, falling back to default');
- this.XB = this.YB = this.ZB = 0;
- }
- if (this.amin > this.amax || this.bmin > this.bmax) {
- info('Invalid Range, falling back to defaults');
- this.amin = -100;
- this.amax = 100;
- this.bmin = -100;
- this.bmax = 100;
- }
- }
- // Function g(x) from spec
- function fn_g(x) {
- if (x >= 6 / 29)
- return x * x * x;
- else
- return (108 / 841) * (x - 4 / 29);
- }
- function decode(value, high1, low2, high2) {
- return low2 + (value) * (high2 - low2) / (high1);
- }
- // If decoding is needed maxVal should be 2^bits per component - 1.
- function convertToRgb(cs, src, srcOffset, maxVal, dest, destOffset) {
- // XXX: Lab input is in the range of [0, 100], [amin, amax], [bmin, bmax]
- // not the usual [0, 1]. If a command like setFillColor is used the src
- // values will already be within the correct range. However, if we are
- // converting an image we have to map the values to the correct range given
- // above.
- // Ls,as,bs <---> L*,a*,b* in the spec
- var Ls = src[srcOffset];
- var as = src[srcOffset + 1];
- var bs = src[srcOffset + 2];
- if (maxVal !== false) {
- Ls = decode(Ls, maxVal, 0, 100);
- as = decode(as, maxVal, cs.amin, cs.amax);
- bs = decode(bs, maxVal, cs.bmin, cs.bmax);
- }
- // Adjust limits of 'as' and 'bs'
- as = as > cs.amax ? cs.amax : as < cs.amin ? cs.amin : as;
- bs = bs > cs.bmax ? cs.bmax : bs < cs.bmin ? cs.bmin : bs;
- // Computes intermediate variables X,Y,Z as per spec
- var M = (Ls + 16) / 116;
- var L = M + (as / 500);
- var N = M - (bs / 200);
- var X = cs.XW * fn_g(L);
- var Y = cs.YW * fn_g(M);
- var Z = cs.ZW * fn_g(N);
- var r, g, b;
- // Using different conversions for D50 and D65 white points,
- // per http://www.color.org/srgb.pdf
- if (cs.ZW < 1) {
- // Assuming D50 (X=0.9642, Y=1.00, Z=0.8249)
- r = X * 3.1339 + Y * -1.6170 + Z * -0.4906;
- g = X * -0.9785 + Y * 1.9160 + Z * 0.0333;
- b = X * 0.0720 + Y * -0.2290 + Z * 1.4057;
- } else {
- // Assuming D65 (X=0.9505, Y=1.00, Z=1.0888)
- r = X * 3.2406 + Y * -1.5372 + Z * -0.4986;
- g = X * -0.9689 + Y * 1.8758 + Z * 0.0415;
- b = X * 0.0557 + Y * -0.2040 + Z * 1.0570;
- }
- // clamp color values to [0,1] range then convert to [0,255] range.
- dest[destOffset] = Math.sqrt(r < 0 ? 0 : r > 1 ? 1 : r) * 255;
- dest[destOffset + 1] = Math.sqrt(g < 0 ? 0 : g > 1 ? 1 : g) * 255;
- dest[destOffset + 2] = Math.sqrt(b < 0 ? 0 : b > 1 ? 1 : b) * 255;
- }
- LabCS.prototype = {
- getRgb: function LabCS_getRgb(src, srcOffset) {
- var rgb = new Uint8Array(3);
- convertToRgb(this, src, srcOffset, false, rgb, 0);
- return rgb;
- },
- getRgbItem: function LabCS_getRgbItem(src, srcOffset, dest, destOffset) {
- convertToRgb(this, src, srcOffset, false, dest, destOffset);
- },
- getRgbBuffer: function LabCS_getRgbBuffer(src, srcOffset, count,
- dest, destOffset, bits,
- alpha01) {
- var maxVal = (1 << bits) - 1;
- for (var i = 0; i < count; i++) {
- convertToRgb(this, src, srcOffset, maxVal, dest, destOffset);
- srcOffset += 3;
- destOffset += 3 + alpha01;
- }
- },
- getOutputLength: function LabCS_getOutputLength(inputLength, alpha01) {
- return (inputLength * (3 + alpha01) / 3) | 0;
- },
- isPassthrough: ColorSpace.prototype.isPassthrough,
- isDefaultDecode: function LabCS_isDefaultDecode(decodeMap) {
- // XXX: Decoding is handled with the lab conversion because of the strange
- // ranges that are used.
- return true;
- },
- usesZeroToOneRange: false
- };
- return LabCS;
- })();
- var PDFFunction = (function PDFFunctionClosure() {
- var CONSTRUCT_SAMPLED = 0;
- var CONSTRUCT_INTERPOLATED = 2;
- var CONSTRUCT_STICHED = 3;
- var CONSTRUCT_POSTSCRIPT = 4;
- return {
- getSampleArray: function PDFFunction_getSampleArray(size, outputSize, bps,
- str) {
- var length = 1;
- for (var i = 0, ii = size.length; i < ii; i++)
- length *= size[i];
- length *= outputSize;
- var array = [];
- var codeSize = 0;
- var codeBuf = 0;
- // 32 is a valid bps so shifting won't work
- var sampleMul = 1.0 / (Math.pow(2.0, bps) - 1);
- var strBytes = str.getBytes((length * bps + 7) / 8);
- var strIdx = 0;
- for (var i = 0; i < length; i++) {
- while (codeSize < bps) {
- codeBuf <<= 8;
- codeBuf |= strBytes[strIdx++];
- codeSize += 8;
- }
- codeSize -= bps;
- array.push((codeBuf >> codeSize) * sampleMul);
- codeBuf &= (1 << codeSize) - 1;
- }
- return array;
- },
- getIR: function PDFFunction_getIR(xref, fn) {
- var dict = fn.dict;
- if (!dict)
- dict = fn;
- var types = [this.constructSampled,
- null,
- this.constructInterpolated,
- this.constructStiched,
- this.constructPostScript];
- var typeNum = dict.get('FunctionType');
- var typeFn = types[typeNum];
- if (!typeFn)
- error('Unknown type of function');
- return typeFn.call(this, fn, dict, xref);
- },
- fromIR: function PDFFunction_fromIR(IR) {
- var type = IR[0];
- switch (type) {
- case CONSTRUCT_SAMPLED:
- return this.constructSampledFromIR(IR);
- case CONSTRUCT_INTERPOLATED:
- return this.constructInterpolatedFromIR(IR);
- case CONSTRUCT_STICHED:
- return this.constructStichedFromIR(IR);
- //case CONSTRUCT_POSTSCRIPT:
- default:
- return this.constructPostScriptFromIR(IR);
- }
- },
- parse: function PDFFunction_parse(xref, fn) {
- var IR = this.getIR(xref, fn);
- return this.fromIR(IR);
- },
- constructSampled: function PDFFunction_constructSampled(str, dict) {
- function toMultiArray(arr) {
- var inputLength = arr.length;
- var outputLength = arr.length / 2;
- var out = [];
- var index = 0;
- for (var i = 0; i < inputLength; i += 2) {
- out[index] = [arr[i], arr[i + 1]];
- ++index;
- }
- return out;
- }
- var domain = dict.get('Domain');
- var range = dict.get('Range');
- if (!domain || !range)
- error('No domain or range');
- var inputSize = domain.length / 2;
- var outputSize = range.length / 2;
- domain = toMultiArray(domain);
- range = toMultiArray(range);
- var size = dict.get('Size');
- var bps = dict.get('BitsPerSample');
- var order = dict.get('Order') || 1;
- if (order !== 1) {
- // No description how cubic spline interpolation works in PDF32000:2008
- // As in poppler, ignoring order, linear interpolation may work as good
- info('No support for cubic spline interpolation: ' + order);
- }
- var encode = dict.get('Encode');
- if (!encode) {
- encode = [];
- for (var i = 0; i < inputSize; ++i) {
- encode.push(0);
- encode.push(size[i] - 1);
- }
- }
- encode = toMultiArray(encode);
- var decode = dict.get('Decode');
- if (!decode)
- decode = range;
- else
- decode = toMultiArray(decode);
- var samples = this.getSampleArray(size, outputSize, bps, str);
- return [
- CONSTRUCT_SAMPLED, inputSize, domain, encode, decode, samples, size,
- outputSize, Math.pow(2, bps) - 1, range
- ];
- },
- constructSampledFromIR: function PDFFunction_constructSampledFromIR(IR) {
- // See chapter 3, page 109 of the PDF reference
- function interpolate(x, xmin, xmax, ymin, ymax) {
- return ymin + ((x - xmin) * ((ymax - ymin) / (xmax - xmin)));
- }
- return function constructSampledFromIRResult(args) {
- // See chapter 3, page 110 of the PDF reference.
- var m = IR[1];
- var domain = IR[2];
- var encode = IR[3];
- var decode = IR[4];
- var samples = IR[5];
- var size = IR[6];
- var n = IR[7];
- var mask = IR[8];
- var range = IR[9];
- if (m != args.length)
- error('Incorrect number of arguments: ' + m + ' != ' +
- args.length);
- var x = args;
- // Building the cube vertices: its part and sample index
- // http://rjwagner49.com/Mathematics/Interpolation.pdf
- var cubeVertices = 1 << m;
- var cubeN = new Float64Array(cubeVertices);
- var cubeVertex = new Uint32Array(cubeVertices);
- for (var j = 0; j < cubeVertices; j++)
- cubeN[j] = 1;
- var k = n, pos = 1;
- // Map x_i to y_j for 0 <= i < m using the sampled function.
- for (var i = 0; i < m; ++i) {
- // x_i' = min(max(x_i, Domain_2i), Domain_2i+1)
- var domain_2i = domain[i][0];
- var domain_2i_1 = domain[i][1];
- var xi = Math.min(Math.max(x[i], domain_2i), domain_2i_1);
- // e_i = Interpolate(x_i', Domain_2i, Domain_2i+1,
- // Encode_2i, Encode_2i+1)
- var e = interpolate(xi, domain_2i, domain_2i_1,
- encode[i][0], encode[i][1]);
- // e_i' = min(max(e_i, 0), Size_i - 1)
- var size_i = size[i];
- e = Math.min(Math.max(e, 0), size_i - 1);
- // Adjusting the cube: N and vertex sample index
- var e0 = e < size_i - 1 ? Math.floor(e) : e - 1; // e1 = e0 + 1;
- var n0 = e0 + 1 - e; // (e1 - e) / (e1 - e0);
- var n1 = e - e0; // (e - e0) / (e1 - e0);
- var offset0 = e0 * k;
- var offset1 = offset0 + k; // e1 * k
- for (var j = 0; j < cubeVertices; j++) {
- if (j & pos) {
- cubeN[j] *= n1;
- cubeVertex[j] += offset1;
- } else {
- cubeN[j] *= n0;
- cubeVertex[j] += offset0;
- }
- }
- k *= size_i;
- pos <<= 1;
- }
- var y = new Float64Array(n);
- for (var j = 0; j < n; ++j) {
- // Sum all cube vertices' samples portions
- var rj = 0;
- for (var i = 0; i < cubeVertices; i++)
- rj += samples[cubeVertex[i] + j] * cubeN[i];
- // r_j' = Interpolate(r_j, 0, 2^BitsPerSample - 1,
- // Decode_2j, Decode_2j+1)
- rj = interpolate(rj, 0, 1, decode[j][0], decode[j][1]);
- // y_j = min(max(r_j, range_2j), range_2j+1)
- y[j] = Math.min(Math.max(rj, range[j][0]), range[j][1]);
- }
- return y;
- };
- },
- constructInterpolated: function PDFFunction_constructInterpolated(str,
- dict) {
- var c0 = dict.get('C0') || [0];
- var c1 = dict.get('C1') || [1];
- var n = dict.get('N');
- if (!isArray(c0) || !isArray(c1))
- error('Illegal dictionary for interpolated function');
- var length = c0.length;
- var diff = [];
- for (var i = 0; i < length; ++i)
- diff.push(c1[i] - c0[i]);
- return [CONSTRUCT_INTERPOLATED, c0, diff, n];
- },
- constructInterpolatedFromIR:
- function PDFFunction_constructInterpolatedFromIR(IR) {
- var c0 = IR[1];
- var diff = IR[2];
- var n = IR[3];
- var length = diff.length;
- return function constructInterpolatedFromIRResult(args) {
- var x = n == 1 ? args[0] : Math.pow(args[0], n);
- var out = [];
- for (var j = 0; j < length; ++j)
- out.push(c0[j] + (x * diff[j]));
- return out;
- };
- },
- constructStiched: function PDFFunction_constructStiched(fn, dict, xref) {
- var domain = dict.get('Domain');
- if (!domain)
- error('No domain');
- var inputSize = domain.length / 2;
- if (inputSize != 1)
- error('Bad domain for stiched function');
- var fnRefs = dict.get('Functions');
- var fns = [];
- for (var i = 0, ii = fnRefs.length; i < ii; ++i)
- fns.push(PDFFunction.getIR(xref, xref.fetchIfRef(fnRefs[i])));
- var bounds = dict.get('Bounds');
- var encode = dict.get('Encode');
- return [CONSTRUCT_STICHED, domain, bounds, encode, fns];
- },
- constructStichedFromIR: function PDFFunction_constructStichedFromIR(IR) {
- var domain = IR[1];
- var bounds = IR[2];
- var encode = IR[3];
- var fnsIR = IR[4];
- var fns = [];
- for (var i = 0, ii = fnsIR.length; i < ii; i++) {
- fns.push(PDFFunction.fromIR(fnsIR[i]));
- }
- return function constructStichedFromIRResult(args) {
- var clip = function constructStichedFromIRClip(v, min, max) {
- if (v > max)
- v = max;
- else if (v < min)
- v = min;
- return v;
- };
- // clip to domain
- var v = clip(args[0], domain[0], domain[1]);
- // calulate which bound the value is in
- for (var i = 0, ii = bounds.length; i < ii; ++i) {
- if (v < bounds[i])
- break;
- }
- // encode value into domain of function
- var dmin = domain[0];
- if (i > 0)
- dmin = bounds[i - 1];
- var dmax = domain[1];
- if (i < bounds.length)
- dmax = bounds[i];
- var rmin = encode[2 * i];
- var rmax = encode[2 * i + 1];
- var v2 = rmin + (v - dmin) * (rmax - rmin) / (dmax - dmin);
- // call the appropropriate function
- return fns[i]([v2]);
- };
- },
- constructPostScript: function PDFFunction_constructPostScript(fn, dict,
- xref) {
- var domain = dict.get('Domain');
- var range = dict.get('Range');
- if (!domain)
- error('No domain.');
- if (!range)
- error('No range.');
- var lexer = new PostScriptLexer(fn);
- var parser = new PostScriptParser(lexer);
- var code = parser.parse();
- return [CONSTRUCT_POSTSCRIPT, domain, range, code];
- },
- constructPostScriptFromIR: function PDFFunction_constructPostScriptFromIR(
- IR) {
- var domain = IR[1];
- var range = IR[2];
- var code = IR[3];
- var numOutputs = range.length / 2;
- var evaluator = new PostScriptEvaluator(code);
- // Cache the values for a big speed up, the cache size is limited though
- // since the number of possible values can be huge from a PS function.
- var cache = new FunctionCache();
- return function constructPostScriptFromIRResult(args) {
- var initialStack = [];
- for (var i = 0, ii = (domain.length / 2); i < ii; ++i) {
- initialStack.push(args[i]);
- }
- var key = initialStack.join('_');
- if (cache.has(key))
- return cache.get(key);
- var stack = evaluator.execute(initialStack);
- var transformed = [];
- for (i = numOutputs - 1; i >= 0; --i) {
- var out = stack.pop();
- var rangeIndex = 2 * i;
- if (out < range[rangeIndex])
- out = range[rangeIndex];
- else if (out > range[rangeIndex + 1])
- out = range[rangeIndex + 1];
- transformed[i] = out;
- }
- cache.set(key, transformed);
- return transformed;
- };
- }
- };
- })();
- var FunctionCache = (function FunctionCacheClosure() {
- // Of 10 PDF's with type4 functions the maxium number of distinct values seen
- // was 256. This still may need some tweaking in the future though.
- var MAX_CACHE_SIZE = 1024;
- function FunctionCache() {
- this.cache = {};
- this.total = 0;
- }
- FunctionCache.prototype = {
- has: function FunctionCache_has(key) {
- return key in this.cache;
- },
- get: function FunctionCache_get(key) {
- return this.cache[key];
- },
- set: function FunctionCache_set(key, value) {
- if (this.total < MAX_CACHE_SIZE) {
- this.cache[key] = value;
- this.total++;
- }
- }
- };
- return FunctionCache;
- })();
- var PostScriptStack = (function PostScriptStackClosure() {
- var MAX_STACK_SIZE = 100;
- function PostScriptStack(initialStack) {
- this.stack = initialStack || [];
- }
- PostScriptStack.prototype = {
- push: function PostScriptStack_push(value) {
- if (this.stack.length >= MAX_STACK_SIZE)
- error('PostScript function stack overflow.');
- this.stack.push(value);
- },
- pop: function PostScriptStack_pop() {
- if (this.stack.length <= 0)
- error('PostScript function stack underflow.');
- return this.stack.pop();
- },
- copy: function PostScriptStack_copy(n) {
- if (this.stack.length + n >= MAX_STACK_SIZE)
- error('PostScript function stack overflow.');
- var stack = this.stack;
- for (var i = stack.length - n, j = n - 1; j >= 0; j--, i++)
- stack.push(stack[i]);
- },
- index: function PostScriptStack_index(n) {
- this.push(this.stack[this.stack.length - n - 1]);
- },
- // rotate the last n stack elements p times
- roll: function PostScriptStack_roll(n, p) {
- var stack = this.stack;
- var l = stack.length - n;
- var r = stack.length - 1, c = l + (p - Math.floor(p / n) * n), i, j, t;
- for (i = l, j = r; i < j; i++, j--) {
- t = stack[i]; stack[i] = stack[j]; stack[j] = t;
- }
- for (i = l, j = c - 1; i < j; i++, j--) {
- t = stack[i]; stack[i] = stack[j]; stack[j] = t;
- }
- for (i = c, j = r; i < j; i++, j--) {
- t = stack[i]; stack[i] = stack[j]; stack[j] = t;
- }
- }
- };
- return PostScriptStack;
- })();
- var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
- function PostScriptEvaluator(operators, operands) {
- this.operators = operators;
- this.operands = operands;
- }
- PostScriptEvaluator.prototype = {
- execute: function PostScriptEvaluator_execute(initialStack) {
- var stack = new PostScriptStack(initialStack);
- var counter = 0;
- var operators = this.operators;
- var length = operators.length;
- var operator, a, b;
- while (counter < length) {
- operator = operators[counter++];
- if (typeof operator == 'number') {
- // Operator is really an operand and should be pushed to the stack.
- stack.push(operator);
- continue;
- }
- switch (operator) {
- // non standard ps operators
- case 'jz': // jump if false
- b = stack.pop();
- a = stack.pop();
- if (!a)
- counter = b;
- break;
- case 'j': // jump
- a = stack.pop();
- counter = a;
- break;
- // all ps operators in alphabetical order (excluding if/ifelse)
- case 'abs':
- a = stack.pop();
- stack.push(Math.abs(a));
- break;
- case 'add':
- b = stack.pop();
- a = stack.pop();
- stack.push(a + b);
- break;
- case 'and':
- b = stack.pop();
- a = stack.pop();
- if (isBool(a) && isBool(b))
- stack.push(a && b);
- else
- stack.push(a & b);
- break;
- case 'atan':
- a = stack.pop();
- stack.push(Math.atan(a));
- break;
- case 'bitshift':
- b = stack.pop();
- a = stack.pop();
- if (a > 0)
- stack.push(a << b);
- else
- stack.push(a >> b);
- break;
- case 'ceiling':
- a = stack.pop();
- stack.push(Math.ceil(a));
- break;
- case 'copy':
- a = stack.pop();
- stack.copy(a);
- break;
- case 'cos':
- a = stack.pop();
- stack.push(Math.cos(a));
- break;
- case 'cvi':
- a = stack.pop() | 0;
- stack.push(a);
- break;
- case 'cvr':
- // noop
- break;
- case 'div':
- b = stack.pop();
- a = stack.pop();
- stack.push(a / b);
- break;
- case 'dup':
- stack.copy(1);
- break;
- case 'eq':
- b = stack.pop();
- a = stack.pop();
- stack.push(a == b);
- break;
- case 'exch':
- stack.roll(2, 1);
- break;
- case 'exp':
- b = stack.pop();
- a = stack.pop();
- stack.push(Math.pow(a, b));
- break;
- case 'false':
- stack.push(false);
- break;
- case 'floor':
- a = stack.pop();
- stack.push(Math.floor(a));
- break;
- case 'ge':
- b = stack.pop();
- a = stack.pop();
- stack.push(a >= b);
- break;
- case 'gt':
- b = stack.pop();
- a = stack.pop();
- stack.push(a > b);
- break;
- case 'idiv':
- b = stack.pop();
- a = stack.pop();
- stack.push((a / b) | 0);
- break;
- case 'index':
- a = stack.pop();
- stack.index(a);
- break;
- case 'le':
- b = stack.pop();
- a = stack.pop();
- stack.push(a <= b);
- break;
- case 'ln':
- a = stack.pop();
- stack.push(Math.log(a));
- break;
- case 'log':
- a = stack.pop();
- stack.push(Math.log(a) / Math.LN10);
- break;
- case 'lt':
- b = stack.pop();
- a = stack.pop();
- stack.push(a < b);
- break;
- case 'mod':
- b = stack.pop();
- a = stack.pop();
- stack.push(a % b);
- break;
- case 'mul':
- b = stack.pop();
- a = stack.pop();
- stack.push(a * b);
- break;
- case 'ne':
- b = stack.pop();
- a = stack.pop();
- stack.push(a != b);
- break;
- case 'neg':
- a = stack.pop();
- stack.push(-b);
- break;
- case 'not':
- a = stack.pop();
- if (isBool(a) && isBool(b))
- stack.push(a && b);
- else
- stack.push(a & b);
- break;
- case 'or':
- b = stack.pop();
- a = stack.pop();
- if (isBool(a) && isBool(b))
- stack.push(a || b);
- else
- stack.push(a | b);
- break;
- case 'pop':
- stack.pop();
- break;
- case 'roll':
- b = stack.pop();
- a = stack.pop();
- stack.roll(a, b);
- break;
- case 'round':
- a = stack.pop();
- stack.push(Math.round(a));
- break;
- case 'sin':
- a = stack.pop();
- stack.push(Math.sin(a));
- break;
- case 'sqrt':
- a = stack.pop();
- stack.push(Math.sqrt(a));
- break;
- case 'sub':
- b = stack.pop();
- a = stack.pop();
- stack.push(a - b);
- break;
- case 'true':
- stack.push(true);
- break;
- case 'truncate':
- a = stack.pop();
- a = a < 0 ? Math.ceil(a) : Math.floor(a);
- stack.push(a);
- break;
- case 'xor':
- b = stack.pop();
- a = stack.pop();
- if (isBool(a) && isBool(b))
- stack.push(a != b);
- else
- stack.push(a ^ b);
- break;
- default:
- error('Unknown operator ' + operator);
- break;
- }
- }
- return stack.stack;
- }
- };
- return PostScriptEvaluator;
- })();
- var PostScriptParser = (function PostScriptParserClosure() {
- function PostScriptParser(lexer) {
- this.lexer = lexer;
- this.operators = [];
- this.token = null;
- this.prev = null;
- }
- PostScriptParser.prototype = {
- nextToken: function PostScriptParser_nextToken() {
- this.prev = this.token;
- this.token = this.lexer.getToken();
- },
- accept: function PostScriptParser_accept(type) {
- if (this.token.type == type) {
- this.nextToken();
- return true;
- }
- return false;
- },
- expect: function PostScriptParser_expect(type) {
- if (this.accept(type))
- return true;
- error('Unexpected symbol: found ' + this.token.type + ' expected ' +
- type + '.');
- },
- parse: function PostScriptParser_parse() {
- this.nextToken();
- this.expect(PostScriptTokenTypes.LBRACE);
- this.parseBlock();
- this.expect(PostScriptTokenTypes.RBRACE);
- return this.operators;
- },
- parseBlock: function PostScriptParser_parseBlock() {
- while (true) {
- if (this.accept(PostScriptTokenTypes.NUMBER)) {
- this.operators.push(this.prev.value);
- } else if (this.accept(PostScriptTokenTypes.OPERATOR)) {
- this.operators.push(this.prev.value);
- } else if (this.accept(PostScriptTokenTypes.LBRACE)) {
- this.parseCondition();
- } else {
- return;
- }
- }
- },
- parseCondition: function PostScriptParser_parseCondition() {
- // Add two place holders that will be updated later
- var conditionLocation = this.operators.length;
- this.operators.push(null, null);
- this.parseBlock();
- this.expect(PostScriptTokenTypes.RBRACE);
- if (this.accept(PostScriptTokenTypes.IF)) {
- // The true block is right after the 'if' so it just falls through on
- // true else it jumps and skips the true block.
- this.operators[conditionLocation] = this.operators.length;
- this.operators[conditionLocation + 1] = 'jz';
- } else if (this.accept(PostScriptTokenTypes.LBRACE)) {
- var jumpLocation = this.operators.length;
- this.operators.push(null, null);
- var endOfTrue = this.operators.length;
- this.parseBlock();
- this.expect(PostScriptTokenTypes.RBRACE);
- this.expect(PostScriptTokenTypes.IFELSE);
- // The jump is added at the end of the true block to skip the false
- // block.
- this.operators[jumpLocation] = this.operators.length;
- this.operators[jumpLocation + 1] = 'j';
- this.operators[conditionLocation] = endOfTrue;
- this.operators[conditionLocation + 1] = 'jz';
- } else {
- error('PS Function: error parsing conditional.');
- }
- }
- };
- return PostScriptParser;
- })();
- var PostScriptTokenTypes = {
- LBRACE: 0,
- RBRACE: 1,
- NUMBER: 2,
- OPERATOR: 3,
- IF: 4,
- IFELSE: 5
- };
- var PostScriptToken = (function PostScriptTokenClosure() {
- function PostScriptToken(type, value) {
- this.type = type;
- this.value = value;
- }
- var opCache = {};
- PostScriptToken.getOperator = function PostScriptToken_getOperator(op) {
- var opValue = opCache[op];
- if (opValue)
- return opValue;
- return opCache[op] = new PostScriptToken(PostScriptTokenTypes.OPERATOR, op);
- };
- PostScriptToken.LBRACE = new PostScriptToken(PostScriptTokenTypes.LBRACE,
- '{');
- PostScriptToken.RBRACE = new PostScriptToken(PostScriptTokenTypes.RBRACE,
- '}');
- PostScriptToken.IF = new PostScriptToken(PostScriptTokenTypes.IF, 'IF');
- PostScriptToken.IFELSE = new PostScriptToken(PostScriptTokenTypes.IFELSE,
- 'IFELSE');
- return PostScriptToken;
- })();
- var PostScriptLexer = (function PostScriptLexerClosure() {
- function PostScriptLexer(stream) {
- this.stream = stream;
- this.nextChar();
- }
- PostScriptLexer.prototype = {
- nextChar: function PostScriptLexer_nextChar() {
- return (this.currentChar = this.stream.getByte());
- },
- getToken: function PostScriptLexer_getToken() {
- var s = '';
- var comment = false;
- var ch = this.currentChar;
- // skip comments
- while (true) {
- if (ch < 0) {
- return EOF;
- }
- if (comment) {
- if (ch === 0x0A || ch === 0x0D) {
- comment = false;
- }
- } else if (ch == 0x25) { // '%'
- comment = true;
- } else if (!Lexer.isSpace(ch)) {
- break;
- }
- ch = this.nextChar();
- }
- switch (ch | 0) {
- case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: // '0'-'4'
- case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: // '5'-'9'
- case 0x2B: case 0x2D: case 0x2E: // '+', '-', '.'
- return new PostScriptToken(PostScriptTokenTypes.NUMBER,
- this.getNumber());
- case 0x7B: // '{'
- this.nextChar();
- return PostScriptToken.LBRACE;
- case 0x7D: // '}'
- this.nextChar();
- return PostScriptToken.RBRACE;
- }
- // operator
- var str = String.fromCharCode(ch);
- while ((ch = this.nextChar()) >= 0 && // and 'A'-'Z', 'a'-'z'
- ((ch >= 0x41 && ch <= 0x5A) || (ch >= 0x61 && ch <= 0x7A))) {
- str += String.fromCharCode(ch);
- }
- switch (str.toLowerCase()) {
- case 'if':
- return PostScriptToken.IF;
- case 'ifelse':
- return PostScriptToken.IFELSE;
- default:
- return PostScriptToken.getOperator(str);
- }
- },
- getNumber: function PostScriptLexer_getNumber() {
- var ch = this.currentChar;
- var str = String.fromCharCode(ch);
- while ((ch = this.nextChar()) >= 0) {
- if ((ch >= 0x30 && ch <= 0x39) || // '0'-'9'
- ch === 0x2D || ch === 0x2E) { // '-', '.'
- str += String.fromCharCode(ch);
- } else {
- break;
- }
- }
- var value = parseFloat(str);
- if (isNaN(value))
- error('Invalid floating point number: ' + value);
- return value;
- }
- };
- return PostScriptLexer;
- })();
- var Annotation = (function AnnotationClosure() {
- // 12.5.5: Algorithm: Appearance streams
- function getTransformMatrix(rect, bbox, matrix) {
- var bounds = Util.getAxialAlignedBoundingBox(bbox, matrix);
- var minX = bounds[0];
- var minY = bounds[1];
- var maxX = bounds[2];
- var maxY = bounds[3];
- if (minX === maxX || minY === maxY) {
- // From real-life file, bbox was [0, 0, 0, 0]. In this case,
- // just apply the transform for rect
- return [1, 0, 0, 1, rect[0], rect[1]];
- }
- var xRatio = (rect[2] - rect[0]) / (maxX - minX);
- var yRatio = (rect[3] - rect[1]) / (maxY - minY);
- return [
- xRatio,
- 0,
- 0,
- yRatio,
- rect[0] - minX * xRatio,
- rect[1] - minY * yRatio
- ];
- }
- function getDefaultAppearance(dict) {
- var appearanceState = dict.get('AP');
- if (!isDict(appearanceState)) {
- return;
- }
- var appearance;
- var appearances = appearanceState.get('N');
- if (isDict(appearances)) {
- var as = dict.get('AS');
- if (as && appearances.has(as.name)) {
- appearance = appearances.get(as.name);
- }
- } else {
- appearance = appearances;
- }
- return appearance;
- }
- function Annotation(params) {
- if (params.data) {
- this.data = params.data;
- return;
- }
- var dict = params.dict;
- var data = this.data = {};
- data.subtype = dict.get('Subtype').name;
- var rect = dict.get('Rect');
- data.rect = Util.normalizeRect(rect);
- data.annotationFlags = dict.get('F');
- var color = dict.get('C');
- if (isArray(color) && color.length === 3) {
- // TODO(mack): currently only supporting rgb; need support different
- // colorspaces
- data.color = color;
- } else {
- data.color = [0, 0, 0];
- }
- // Some types of annotations have border style dict which has more
- // info than the border array
- if (dict.has('BS')) {
- var borderStyle = dict.get('BS');
- data.borderWidth = borderStyle.has('W') ? borderStyle.get('W') : 1;
- } else {
- var borderArray = dict.get('Border') || [0, 0, 1];
- data.borderWidth = borderArray[2] || 0;
- // TODO: implement proper support for annotations with line dash patterns.
- var dashArray = borderArray[3];
- if (data.borderWidth > 0 && dashArray && isArray(dashArray)) {
- var dashArrayLength = dashArray.length;
- if (dashArrayLength > 0) {
- // According to the PDF specification: the elements in a dashArray
- // shall be numbers that are nonnegative and not all equal to zero.
- var isInvalid = false;
- var numPositive = 0;
- for (var i = 0; i < dashArrayLength; i++) {
- if (!(+dashArray[i] >= 0)) {
- isInvalid = true;
- break;
- } else if (dashArray[i] > 0) {
- numPositive++;
- }
- }
- if (isInvalid || numPositive === 0) {
- data.borderWidth = 0;
- }
- }
- }
- }
- this.appearance = getDefaultAppearance(dict);
- data.hasAppearance = !!this.appearance;
- }
- Annotation.prototype = {
- getData: function Annotation_getData() {
- return this.data;
- },
- hasHtml: function Annotation_hasHtml() {
- return false;
- },
- getHtmlElement: function Annotation_getHtmlElement(commonObjs) {
- throw new NotImplementedException(
- 'getHtmlElement() should be implemented in subclass');
- },
- // TODO(mack): Remove this, it's not really that helpful.
- getEmptyContainer: function Annotation_getEmptyContainer(tagName, rect) {
- assert(!isWorker,
- 'getEmptyContainer() should be called from main thread');
- rect = rect || this.data.rect;
- var element = document.createElement(tagName);
- element.style.width = Math.ceil(rect[2] - rect[0]) + 'px';
- element.style.height = Math.ceil(rect[3] - rect[1]) + 'px';
- return element;
- },
- isViewable: function Annotation_isViewable() {
- var data = this.data;
- return !!(
- data &&
- (!data.annotationFlags ||
- !(data.annotationFlags & 0x22)) && // Hidden or NoView
- data.rect // rectangle is nessessary
- );
- },
- loadResources: function(keys) {
- var promise = new LegacyPromise();
- this.appearance.dict.getAsync('Resources').then(function(resources) {
- if (!resources) {
- promise.resolve();
- return;
- }
- var objectLoader = new ObjectLoader(resources.map,
- keys,
- resources.xref);
- objectLoader.load().then(function() {
- promise.resolve(resources);
- });
- }.bind(this));
- return promise;
- },
- getOperatorList: function Annotation_getToOperatorList(evaluator) {
- var promise = new LegacyPromise();
- if (!this.appearance) {
- promise.resolve(new OperatorList());
- return promise;
- }
- var data = this.data;
- var appearanceDict = this.appearance.dict;
- var resourcesPromise = this.loadResources([
- 'ExtGState',
- 'ColorSpace',
- 'Pattern',
- 'Shading',
- 'XObject',
- 'Font'
- // ProcSet
- // Properties
- ]);
- var bbox = appearanceDict.get('BBox') || [0, 0, 1, 1];
- var matrix = appearanceDict.get('Matrix') || [1, 0, 0, 1, 0 ,0];
- var transform = getTransformMatrix(data.rect, bbox, matrix);
- var border = data.border;
- resourcesPromise.then(function(resources) {
- var opList = new OperatorList();
- opList.addOp(OPS.beginAnnotation, [data.rect, transform, matrix]);
- evaluator.getOperatorList(this.appearance, resources, opList);
- opList.addOp(OPS.endAnnotation, []);
- promise.resolve(opList);
- }.bind(this));
- return promise;
- }
- };
- Annotation.getConstructor =
- function Annotation_getConstructor(subtype, fieldType) {
- if (!subtype) {
- return;
- }
- // TODO(mack): Implement FreeText annotations
- if (subtype === 'Link') {
- return LinkAnnotation;
- } else if (subtype === 'Text') {
- return TextAnnotation;
- } else if (subtype === 'Widget') {
- if (!fieldType) {
- return;
- }
- if (fieldType === 'Tx') {
- return TextWidgetAnnotation;
- } else {
- return WidgetAnnotation;
- }
- } else {
- return Annotation;
- }
- };
- // TODO(mack): Support loading annotation from data
- Annotation.fromData = function Annotation_fromData(data) {
- var subtype = data.subtype;
- var fieldType = data.fieldType;
- var Constructor = Annotation.getConstructor(subtype, fieldType);
- if (Constructor) {
- return new Constructor({ data: data });
- }
- };
- Annotation.fromRef = function Annotation_fromRef(xref, ref) {
- var dict = xref.fetchIfRef(ref);
- if (!isDict(dict)) {
- return;
- }
- var subtype = dict.get('Subtype');
- subtype = isName(subtype) ? subtype.name : '';
- if (!subtype) {
- return;
- }
- var fieldType = Util.getInheritableProperty(dict, 'FT');
- fieldType = isName(fieldType) ? fieldType.name : '';
- var Constructor = Annotation.getConstructor(subtype, fieldType);
- if (!Constructor) {
- return;
- }
- var params = {
- dict: dict,
- ref: ref,
- };
- var annotation = new Constructor(params);
- if (annotation.isViewable()) {
- return annotation;
- } else {
- warn('unimplemented annotation type: ' + subtype);
- }
- };
- Annotation.appendToOperatorList = function Annotation_appendToOperatorList(
- annotations, opList, pdfManager, partialEvaluator) {
- function reject(e) {
- annotationsReadyPromise.reject(e);
- }
- var annotationsReadyPromise = new LegacyPromise();
- var annotationPromises = [];
- for (var i = 0, n = annotations.length; i < n; ++i) {
- annotationPromises.push(annotations[i].getOperatorList(partialEvaluator));
- }
- Promise.all(annotationPromises).then(function(datas) {
- opList.addOp(OPS.beginAnnotations, []);
- for (var i = 0, n = datas.length; i < n; ++i) {
- var annotOpList = datas[i];
- opList.addOpList(annotOpList);
- }
- opList.addOp(OPS.endAnnotations, []);
- annotationsReadyPromise.resolve();
- }, reject);
- return annotationsReadyPromise;
- };
- return Annotation;
- })();
- PDFJS.Annotation = Annotation;
- var WidgetAnnotation = (function WidgetAnnotationClosure() {
- function WidgetAnnotation(params) {
- Annotation.call(this, params);
- if (params.data) {
- return;
- }
- var dict = params.dict;
- var data = this.data;
- data.fieldValue = stringToPDFString(
- Util.getInheritableProperty(dict, 'V') || '');
- data.alternativeText = stringToPDFString(dict.get('TU') || '');
- data.defaultAppearance = Util.getInheritableProperty(dict, 'DA') || '';
- var fieldType = Util.getInheritableProperty(dict, 'FT');
- data.fieldType = isName(fieldType) ? fieldType.name : '';
- data.fieldFlags = Util.getInheritableProperty(dict, 'Ff') || 0;
- this.fieldResources = Util.getInheritableProperty(dict, 'DR') || new Dict();
- // Building the full field name by collecting the field and
- // its ancestors 'T' data and joining them using '.'.
- var fieldName = [];
- var namedItem = dict;
- var ref = params.ref;
- while (namedItem) {
- var parent = namedItem.get('Parent');
- var parentRef = namedItem.getRaw('Parent');
- var name = namedItem.get('T');
- if (name) {
- fieldName.unshift(stringToPDFString(name));
- } else {
- // The field name is absent, that means more than one field
- // with the same name may exist. Replacing the empty name
- // with the '`' plus index in the parent's 'Kids' array.
- // This is not in the PDF spec but necessary to id the
- // the input controls.
- var kids = parent.get('Kids');
- var j, jj;
- for (j = 0, jj = kids.length; j < jj; j++) {
- var kidRef = kids[j];
- if (kidRef.num == ref.num && kidRef.gen == ref.gen)
- break;
- }
- fieldName.unshift('`' + j);
- }
- namedItem = parent;
- ref = parentRef;
- }
- data.fullName = fieldName.join('.');
- }
- var parent = Annotation.prototype;
- Util.inherit(WidgetAnnotation, Annotation, {
- isViewable: function WidgetAnnotation_isViewable() {
- if (this.data.fieldType === 'Sig') {
- warn('unimplemented annotation type: Widget signature');
- return false;
- }
- return parent.isViewable.call(this);
- }
- });
- return WidgetAnnotation;
- })();
- var TextWidgetAnnotation = (function TextWidgetAnnotationClosure() {
- function TextWidgetAnnotation(params) {
- WidgetAnnotation.call(this, params);
- if (params.data) {
- return;
- }
- this.data.textAlignment = Util.getInheritableProperty(params.dict, 'Q');
- }
- // TODO(mack): This dupes some of the logic in CanvasGraphics.setFont()
- function setTextStyles(element, item, fontObj) {
- var style = element.style;
- style.fontSize = item.fontSize + 'px';
- style.direction = item.fontDirection < 0 ? 'rtl': 'ltr';
- if (!fontObj) {
- return;
- }
- style.fontWeight = fontObj.black ?
- (fontObj.bold ? 'bolder' : 'bold') :
- (fontObj.bold ? 'bold' : 'normal');
- style.fontStyle = fontObj.italic ? 'italic' : 'normal';
- var fontName = fontObj.loadedName;
- var fontFamily = fontName ? '"' + fontName + '", ' : '';
- // Use a reasonable default font if the font doesn't specify a fallback
- var fallbackName = fontObj.fallbackName || 'Helvetica, sans-serif';
- style.fontFamily = fontFamily + fallbackName;
- }
- var parent = WidgetAnnotation.prototype;
- Util.inherit(TextWidgetAnnotation, WidgetAnnotation, {
- hasHtml: function TextWidgetAnnotation_hasHtml() {
- return !this.data.hasAppearance && !!this.data.fieldValue;
- },
- getHtmlElement: function TextWidgetAnnotation_getHtmlElement(commonObjs) {
- assert(!isWorker, 'getHtmlElement() shall be called from main thread');
- var item = this.data;
- var element = this.getEmptyContainer('div');
- element.style.display = 'table';
- var content = document.createElement('div');
- content.textContent = item.fieldValue;
- var textAlignment = item.textAlignment;
- content.style.textAlign = ['left', 'center', 'right'][textAlignment];
- content.style.verticalAlign = 'middle';
- content.style.display = 'table-cell';
- var fontObj = item.fontRefName ?
- commonObjs.getData(item.fontRefName) : null;
- var cssRules = setTextStyles(content, item, fontObj);
- element.appendChild(content);
- return element;
- },
- getOperatorList: function TextWidgetAnnotation_getOperatorList(evaluator) {
- if (this.appearance) {
- return Annotation.prototype.getOperatorList.call(this, evaluator);
- }
- var promise = new LegacyPromise();
- var opList = new OperatorList();
- var data = this.data;
- // Even if there is an appearance stream, ignore it. This is the
- // behaviour used by Adobe Reader.
- var defaultAppearance = data.defaultAppearance;
- if (!defaultAppearance) {
- promise.resolve(opList);
- return promise;
- }
- // Include any font resources found in the default appearance
- var stream = new Stream(stringToBytes(defaultAppearance));
- evaluator.getOperatorList(stream, this.fieldResources, opList);
- var appearanceFnArray = opList.fnArray;
- var appearanceArgsArray = opList.argsArray;
- var fnArray = [];
- var argsArray = [];
- // TODO(mack): Add support for stroke color
- data.rgb = [0, 0, 0];
- // TODO THIS DOESN'T MAKE ANY SENSE SINCE THE fnArray IS EMPTY!
- for (var i = 0, n = fnArray.length; i < n; ++i) {
- var fnId = appearanceFnArray[i];
- var args = appearanceArgsArray[i];
- if (fnId === OPS.setFont) {
- data.fontRefName = args[0];
- var size = args[1];
- if (size < 0) {
- data.fontDirection = -1;
- data.fontSize = -size;
- } else {
- data.fontDirection = 1;
- data.fontSize = size;
- }
- } else if (fnId === OPS.setFillRGBColor) {
- data.rgb = args;
- } else if (fnId === OPS.setFillGray) {
- var rgbValue = args[0] * 255;
- data.rgb = [rgbValue, rgbValue, rgbValue];
- }
- }
- promise.resolve(opList);
- return promise;
- }
- });
- return TextWidgetAnnotation;
- })();
- var TextAnnotation = (function TextAnnotationClosure() {
- function TextAnnotation(params) {
- Annotation.call(this, params);
- if (params.data) {
- return;
- }
- var dict = params.dict;
- var data = this.data;
- var content = dict.get('Contents');
- var title = dict.get('T');
- data.content = stringToPDFString(content || '');
- data.title = stringToPDFString(title || '');
- data.name = !dict.has('Name') ? 'Note' : dict.get('Name').name;
- }
- var ANNOT_MIN_SIZE = 10;
- Util.inherit(TextAnnotation, Annotation, {
- getOperatorList: function TextAnnotation_getOperatorList(evaluator) {
- var promise = new LegacyPromise();
- promise.resolve(new OperatorList());
- return promise;
- },
- hasHtml: function TextAnnotation_hasHtml() {
- return true;
- },
- getHtmlElement: function TextAnnotation_getHtmlElement(commonObjs) {
- assert(!isWorker, 'getHtmlElement() shall be called from main thread');
- var item = this.data;
- var rect = item.rect;
- // sanity check because of OOo-generated PDFs
- if ((rect[3] - rect[1]) < ANNOT_MIN_SIZE) {
- rect[3] = rect[1] + ANNOT_MIN_SIZE;
- }
- if ((rect[2] - rect[0]) < ANNOT_MIN_SIZE) {
- rect[2] = rect[0] + (rect[3] - rect[1]); // make it square
- }
- var container = this.getEmptyContainer('section', rect);
- container.className = 'annotText';
- var image = document.createElement('img');
- image.style.height = container.style.height;
- var iconName = item.name;
- image.src = PDFJS.imageResourcesPath + 'annotation-' +
- iconName.toLowerCase() + '.svg';
- image.alt = '[{{type}} Annotation]';
- image.dataset.l10nId = 'text_annotation_type';
- image.dataset.l10nArgs = JSON.stringify({type: iconName});
- var content = document.createElement('div');
- content.setAttribute('hidden', true);
- var title = document.createElement('h1');
- var text = document.createElement('p');
- content.style.left = Math.floor(rect[2] - rect[0]) + 'px';
- content.style.top = '0px';
- title.textContent = item.title;
- if (!item.content && !item.title) {
- content.setAttribute('hidden', true);
- } else {
- var e = document.createElement('span');
- var lines = item.content.split(/(?:\r\n?|\n)/);
- for (var i = 0, ii = lines.length; i < ii; ++i) {
- var line = lines[i];
- e.appendChild(document.createTextNode(line));
- if (i < (ii - 1))
- e.appendChild(document.createElement('br'));
- }
- text.appendChild(e);
- var showAnnotation = function showAnnotation() {
- container.style.zIndex += 1;
- content.removeAttribute('hidden');
- };
- var hideAnnotation = function hideAnnotation(e) {
- if (e.toElement || e.relatedTarget) { // No context menu is used
- container.style.zIndex -= 1;
- content.setAttribute('hidden', true);
- }
- };
- content.addEventListener('mouseover', showAnnotation, false);
- content.addEventListener('mouseout', hideAnnotation, false);
- image.addEventListener('mouseover', showAnnotation, false);
- image.addEventListener('mouseout', hideAnnotation, false);
- }
- content.appendChild(title);
- content.appendChild(text);
- container.appendChild(image);
- container.appendChild(content);
- return container;
- }
- });
- return TextAnnotation;
- })();
- var LinkAnnotation = (function LinkAnnotationClosure() {
- function LinkAnnotation(params) {
- Annotation.call(this, params);
- if (params.data) {
- return;
- }
- var dict = params.dict;
- var data = this.data;
- var action = dict.get('A');
- if (action) {
- var linkType = action.get('S').name;
- if (linkType === 'URI') {
- var url = action.get('URI');
- if (isName(url)) {
- // Some bad PDFs do not put parentheses around relative URLs.
- url = '/' + url.name;
- } else {
- url = addDefaultProtocolToUrl(url);
- }
- // TODO: pdf spec mentions urls can be relative to a Base
- // entry in the dictionary.
- if (!isValidUrl(url, false)) {
- url = '';
- }
- data.url = url;
- } else if (linkType === 'GoTo') {
- data.dest = action.get('D');
- } else if (linkType === 'GoToR') {
- var urlDict = action.get('F');
- if (isDict(urlDict)) {
- // We assume that the 'url' is a Filspec dictionary
- // and fetch the url without checking any further
- url = urlDict.get('F') || '';
- }
- // TODO: pdf reference says that GoToR
- // can also have 'NewWindow' attribute
- if (!isValidUrl(url, false)) {
- url = '';
- }
- data.url = url;
- data.dest = action.get('D');
- } else if (linkType === 'Named') {
- data.action = action.get('N').name;
- } else {
- warn('unrecognized link type: ' + linkType);
- }
- } else if (dict.has('Dest')) {
- // simple destination link
- var dest = dict.get('Dest');
- data.dest = isName(dest) ? dest.name : dest;
- }
- }
- // Lets URLs beginning with 'www.' default to using the 'http://' protocol.
- function addDefaultProtocolToUrl(url) {
- if (url.indexOf('www.') === 0) {
- return ('http://' + url);
- }
- return url;
- }
- Util.inherit(LinkAnnotation, Annotation, {
- hasOperatorList: function LinkAnnotation_hasOperatorList() {
- return false;
- },
- hasHtml: function LinkAnnotation_hasHtml() {
- return true;
- },
- getHtmlElement: function LinkAnnotation_getHtmlElement(commonObjs) {
- var rect = this.data.rect;
- var element = document.createElement('a');
- var borderWidth = this.data.borderWidth;
- element.style.borderWidth = borderWidth + 'px';
- var color = this.data.color;
- var rgb = [];
- for (var i = 0; i < 3; ++i) {
- rgb[i] = Math.round(color[i] * 255);
- }
- element.style.borderColor = Util.makeCssRgb(rgb);
- element.style.borderStyle = 'solid';
- var width = rect[2] - rect[0] - 2 * borderWidth;
- var height = rect[3] - rect[1] - 2 * borderWidth;
- element.style.width = width + 'px';
- element.style.height = height + 'px';
- element.href = this.data.url || '';
- return element;
- }
- });
- return LinkAnnotation;
- })();
- /**
- * The maximum allowed image size in total pixels e.g. width * height. Images
- * above this value will not be drawn. Use -1 for no limit.
- * @var {number}
- */
- PDFJS.maxImageSize = PDFJS.maxImageSize === undefined ? -1 : PDFJS.maxImageSize;
- /**
- * By default fonts are converted to OpenType fonts and loaded via font face
- * rules. If disabled, the font will be rendered using a built in font renderer
- * that constructs the glyphs with primitive path commands.
- * @var {boolean}
- */
- PDFJS.disableFontFace = PDFJS.disableFontFace === undefined ?
- false : PDFJS.disableFontFace;
- /**
- * Path for image resources, mainly for annotation icons. Include trailing
- * slash.
- * @var {string}
- */
- PDFJS.imageResourcesPath = PDFJS.imageResourcesPath === undefined ?
- '' : PDFJS.imageResourcesPath;
- /**
- * Disable the web worker and run all code on the main thread. This will happen
- * automatically if the browser doesn't support workers or sending typed arrays
- * to workers.
- * @var {boolean}
- */
- PDFJS.disableWorker = PDFJS.disableWorker === undefined ?
- false : PDFJS.disableWorker;
- /**
- * Path and filename of the worker file. Required when the worker is enabled in
- * development mode. If unspecified in the production build, the worker will be
- * loaded based on the location of the pdf.js file.
- * @var {string}
- */
- PDFJS.workerSrc = PDFJS.workerSrc === undefined ? null : PDFJS.workerSrc;
- /**
- * Disable range request loading of PDF files. When enabled and if the server
- * supports partial content requests then the PDF will be fetched in chunks.
- * Enabled (false) by default.
- * @var {boolean}
- */
- PDFJS.disableRange = PDFJS.disableRange === undefined ?
- false : PDFJS.disableRange;
- /**
- * Disable pre-fetching of PDF file data. When range requests are enabled PDF.js
- * will automatically keep fetching more data even if it isn't needed to display
- * the current page. This default behavior can be disabled.
- * @var {boolean}
- */
- PDFJS.disableAutoFetch = PDFJS.disableAutoFetch === undefined ?
- false : PDFJS.disableAutoFetch;
- /**
- * Enables special hooks for debugging PDF.js.
- * @var {boolean}
- */
- PDFJS.pdfBug = PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug;
- /**
- * Enables transfer usage in postMessage for ArrayBuffers.
- * @var {boolean}
- */
- PDFJS.postMessageTransfers = PDFJS.postMessageTransfers === undefined ?
- true : PDFJS.postMessageTransfers;
- /**
- * Disables URL.createObjectURL usage.
- * @var {boolean}
- */
- PDFJS.disableCreateObjectURL = PDFJS.disableCreateObjectURL === undefined ?
- false : PDFJS.disableCreateObjectURL;
- /**
- * Controls the logging level.
- * The constants from PDFJS.VERBOSITY_LEVELS should be used:
- * - errors
- * - warnings [default]
- * - infos
- * @var {number}
- */
- PDFJS.verbosity = PDFJS.verbosity === undefined ?
- PDFJS.VERBOSITY_LEVELS.warnings : PDFJS.verbosity;
- /**
- * Document initialization / loading parameters object.
- *
- * @typedef {Object} DocumentInitParameters
- * @property {string} url - The URL of the PDF.
- * @property {TypedArray} data - A typed array with PDF data.
- * @property {Object} httpHeaders - Basic authentication headers.
- * @property {boolean} withCredentials - Indicates whether or not cross-site
- * Access-Control requests should be made using credentials such as cookies
- * or authorization headers. The default is false.
- * @property {string} password - For decrypting password-protected PDFs.
- * @property {TypedArray} initialData - A typed array with the first portion or
- * all of the pdf data. Used by the extension since some data is already
- * loaded before the switch to range requests.
- */
- /**
- * This is the main entry point for loading a PDF and interacting with it.
- * NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)
- * is used, which means it must follow the same origin rules that any XHR does
- * e.g. No cross domain requests without CORS.
- *
- * @param {string|TypedArray|DocumentInitParameters} source Can be a url to
- * where a PDF is located, a typed array (Uint8Array) already populated with
- * data or parameter object.
- *
- * @param {Object} pdfDataRangeTransport is optional. It is used if you want
- * to manually serve range requests for data in the PDF. See viewer.js for
- * an example of pdfDataRangeTransport's interface.
- *
- * @param {function} passwordCallback is optional. It is used to request a
- * password if wrong or no password was provided. The callback receives two
- * parameters: function that needs to be called with new password and reason
- * (see {PasswordResponses}).
- *
- * @return {Promise} A promise that is resolved with {@link PDFDocumentProxy}
- * object.
- */
- PDFJS.getDocument = function getDocument(source,
- pdfDataRangeTransport,
- passwordCallback,
- progressCallback) {
- var workerInitializedPromise, workerReadyPromise, transport;
- if (typeof source === 'string') {
- source = { url: source };
- } else if (isArrayBuffer(source)) {
- source = { data: source };
- } else if (typeof source !== 'object') {
- error('Invalid parameter in getDocument, need either Uint8Array, ' +
- 'string or a parameter object');
- }
- if (!source.url && !source.data)
- error('Invalid parameter array, need either .data or .url');
- // copy/use all keys as is except 'url' -- full path is required
- var params = {};
- for (var key in source) {
- if (key === 'url' && typeof window !== 'undefined') {
- params[key] = combineUrl(window.location.href, source[key]);
- continue;
- }
- params[key] = source[key];
- }
- workerInitializedPromise = new PDFJS.LegacyPromise();
- workerReadyPromise = new PDFJS.LegacyPromise();
- transport = new WorkerTransport(workerInitializedPromise,
- workerReadyPromise, pdfDataRangeTransport, progressCallback);
- workerInitializedPromise.then(function transportInitialized() {
- transport.passwordCallback = passwordCallback;
- transport.fetchDocument(params);
- });
- return workerReadyPromise;
- };
- /**
- * Proxy to a PDFDocument in the worker thread. Also, contains commonly used
- * properties that can be read synchronously.
- * @class
- */
- var PDFDocumentProxy = (function PDFDocumentProxyClosure() {
- function PDFDocumentProxy(pdfInfo, transport) {
- this.pdfInfo = pdfInfo;
- this.transport = transport;
- }
- PDFDocumentProxy.prototype = /** @lends PDFDocumentProxy.prototype */ {
- /**
- * @return {number} Total number of pages the PDF contains.
- */
- get numPages() {
- return this.pdfInfo.numPages;
- },
- /**
- * @return {string} A unique ID to identify a PDF. Not guaranteed to be
- * unique.
- */
- get fingerprint() {
- return this.pdfInfo.fingerprint;
- },
- /**
- * @return {boolean} true if embedded document fonts are in use. Will be
- * set during rendering of the pages.
- */
- get embeddedFontsUsed() {
- return this.transport.embeddedFontsUsed;
- },
- /**
- * @param {number} pageNumber The page number to get. The first page is 1.
- * @return {Promise} A promise that is resolved with a {@link PDFPageProxy}
- * object.
- */
- getPage: function PDFDocumentProxy_getPage(pageNumber) {
- return this.transport.getPage(pageNumber);
- },
- /**
- * @param {{num: number, gen: number}} ref The page reference. Must have
- * the 'num' and 'gen' properties.
- * @return {Promise} A promise that is resolved with the page index that is
- * associated with the reference.
- */
- getPageIndex: function PDFDocumentProxy_getPageIndex(ref) {
- return this.transport.getPageIndex(ref);
- },
- /**
- * @return {Promise} A promise that is resolved with a lookup table for
- * mapping named destinations to reference numbers.
- */
- getDestinations: function PDFDocumentProxy_getDestinations() {
- return this.transport.getDestinations();
- },
- /**
- * @return {Promise} A promise that is resolved with an array of all the
- * JavaScript strings in the name tree.
- */
- getJavaScript: function PDFDocumentProxy_getJavaScript() {
- var promise = new PDFJS.LegacyPromise();
- var js = this.pdfInfo.javaScript;
- promise.resolve(js);
- return promise;
- },
- /**
- * @return {Promise} A promise that is resolved with an {Array} that is a
- * tree outline (if it has one) of the PDF. The tree is in the format of:
- * [
- * {
- * title: string,
- * bold: boolean,
- * italic: boolean,
- * color: rgb array,
- * dest: dest obj,
- * items: array of more items like this
- * },
- * ...
- * ].
- */
- getOutline: function PDFDocumentProxy_getOutline() {
- var promise = new PDFJS.LegacyPromise();
- var outline = this.pdfInfo.outline;
- promise.resolve(outline);
- return promise;
- },
- /**
- * @return {Promise} A promise that is resolved with an {Object} that has
- * info and metadata properties. Info is an {Object} filled with anything
- * available in the information dictionary and similarly metadata is a
- * {Metadata} object with information from the metadata section of the PDF.
- */
- getMetadata: function PDFDocumentProxy_getMetadata() {
- var promise = new PDFJS.LegacyPromise();
- var info = this.pdfInfo.info;
- var metadata = this.pdfInfo.metadata;
- promise.resolve({
- info: info,
- metadata: metadata ? new PDFJS.Metadata(metadata) : null
- });
- return promise;
- },
- /**
- * @return {Promise} A promise that is resolved with a TypedArray that has
- * the raw data from the PDF.
- */
- getData: function PDFDocumentProxy_getData() {
- var promise = new PDFJS.LegacyPromise();
- this.transport.getData(promise);
- return promise;
- },
- /**
- * @return {Promise} A promise that is resolved when the document's data
- * is loaded
- */
- dataLoaded: function PDFDocumentProxy_dataLoaded() {
- return this.transport.dataLoaded();
- },
- /**
- * Cleans up resources allocated by the document, e.g. created @font-face.
- */
- cleanup: function PDFDocumentProxy_cleanup() {
- this.transport.startCleanup();
- },
- /**
- * Destroys current document instance and terminates worker.
- */
- destroy: function PDFDocumentProxy_destroy() {
- this.transport.destroy();
- }
- };
- return PDFDocumentProxy;
- })();
- /**
- * Page text content part.
- *
- * @typedef {Object} BidiText
- * @property {string} str - text content.
- * @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'.
- * @property {number} x - x position of the text on the page.
- * @property {number} y - y position of the text on the page.
- * @property {number} angle - text rotation.
- * @property {number} size - font size.
- */
- /**
- * Proxy to a PDFPage in the worker thread.
- * @class
- */
- var PDFPageProxy = (function PDFPageProxyClosure() {
- function PDFPageProxy(pageInfo, transport) {
- this.pageInfo = pageInfo;
- this.transport = transport;
- this.stats = new StatTimer();
- this.stats.enabled = !!globalScope.PDFJS.enableStats;
- this.commonObjs = transport.commonObjs;
- this.objs = new PDFObjects();
- this.receivingOperatorList = false;
- this.cleanupAfterRender = false;
- this.pendingDestroy = false;
- this.renderTasks = [];
- }
- PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ {
- /**
- * @return {number} Page number of the page. First page is 1.
- */
- get pageNumber() {
- return this.pageInfo.pageIndex + 1;
- },
- /**
- * @return {number} The number of degrees the page is rotated clockwise.
- */
- get rotate() {
- return this.pageInfo.rotate;
- },
- /**
- * @return {Object} The reference that points to this page. It has 'num' and
- * 'gen' properties.
- */
- get ref() {
- return this.pageInfo.ref;
- },
- /**
- * @return {Array} An array of the visible portion of the PDF page in the
- * user space units - [x1, y1, x2, y2].
- */
- get view() {
- return this.pageInfo.view;
- },
- /**
- * @param {number} scale The desired scale of the viewport.
- * @param {number} rotate Degrees to rotate the viewport. If omitted this
- * defaults to the page rotation.
- * @return {PageViewport} Contains 'width' and 'height' properties along
- * with transforms required for rendering.
- */
- getViewport: function PDFPageProxy_getViewport(scale, rotate) {
- if (arguments.length < 2)
- rotate = this.rotate;
- return new PDFJS.PageViewport(this.view, scale, rotate, 0, 0);
- },
- /**
- * @return {Promise} A promise that is resolved with an {Array} of the
- * annotation objects.
- */
- getAnnotations: function PDFPageProxy_getAnnotations() {
- if (this.annotationsPromise)
- return this.annotationsPromise;
- var promise = new PDFJS.LegacyPromise();
- this.annotationsPromise = promise;
- this.transport.getAnnotations(this.pageInfo.pageIndex);
- return promise;
- },
- /**
- * Begins the process of rendering a page to the desired context.
- * @param {Object} params A parameter object that supports:
- * {
- * canvasContext(required): A 2D context of a DOM Canvas object.,
- * textLayer(optional): An object that has beginLayout, endLayout, and
- * appendText functions.,
- * imageLayer(optional): An object that has beginLayout, endLayout and
- * appendImage functions.,
- * continueCallback(optional): A function that will be called each time
- * the rendering is paused. To continue
- * rendering call the function that is the
- * first argument to the callback.
- * }.
- * @return {RenderTask} An extended promise that is resolved when the page
- * finishes rendering (see RenderTask).
- */
- render: function PDFPageProxy_render(params) {
- var stats = this.stats;
- stats.time('Overall');
- // If there was a pending destroy cancel it so no cleanup happens during
- // this call to render.
- this.pendingDestroy = false;
- // If there is no displayReadyPromise yet, then the operatorList was never
- // requested before. Make the request and create the promise.
- if (!this.displayReadyPromise) {
- this.receivingOperatorList = true;
- this.displayReadyPromise = new LegacyPromise();
- this.operatorList = {
- fnArray: [],
- argsArray: [],
- lastChunk: false
- };
- this.stats.time('Page Request');
- this.transport.messageHandler.send('RenderPageRequest', {
- pageIndex: this.pageNumber - 1
- });
- }
- var internalRenderTask = new InternalRenderTask(complete, params,
- this.objs, this.commonObjs,
- this.operatorList, this.pageNumber);
- this.renderTasks.push(internalRenderTask);
- var renderTask = new RenderTask(internalRenderTask);
- var self = this;
- this.displayReadyPromise.then(
- function pageDisplayReadyPromise(transparency) {
- if (self.pendingDestroy) {
- complete();
- return;
- }
- stats.time('Rendering');
- internalRenderTask.initalizeGraphics(transparency);
- internalRenderTask.operatorListChanged();
- },
- function pageDisplayReadPromiseError(reason) {
- complete(reason);
- }
- );
- function complete(error) {
- var i = self.renderTasks.indexOf(internalRenderTask);
- if (i >= 0) {
- self.renderTasks.splice(i, 1);
- }
- if (self.cleanupAfterRender) {
- self.pendingDestroy = true;
- }
- self._tryDestroy();
- if (error) {
- renderTask.promise.reject(error);
- } else {
- renderTask.promise.resolve();
- }
- stats.timeEnd('Rendering');
- stats.timeEnd('Overall');
- }
- return renderTask;
- },
- /**
- * @return {Promise} That is resolved with the array of {@link BidiText}
- * objects that represent the page text content.
- */
- getTextContent: function PDFPageProxy_getTextContent() {
- var promise = new PDFJS.LegacyPromise();
- this.transport.messageHandler.send('GetTextContent', {
- pageIndex: this.pageNumber - 1
- },
- function textContentCallback(textContent) {
- promise.resolve(textContent);
- }
- );
- return promise;
- },
- /**
- * Destroys resources allocated by the page.
- */
- destroy: function PDFPageProxy_destroy() {
- this.pendingDestroy = true;
- this._tryDestroy();
- },
- /**
- * For internal use only. Attempts to clean up if rendering is in a state
- * where that's possible.
- * @ignore
- */
- _tryDestroy: function PDFPageProxy__destroy() {
- if (!this.pendingDestroy ||
- this.renderTasks.length !== 0 ||
- this.receivingOperatorList) {
- return;
- }
- delete this.operatorList;
- delete this.displayReadyPromise;
- this.objs.clear();
- this.pendingDestroy = false;
- },
- /**
- * For internal use only.
- * @ignore
- */
- _startRenderPage: function PDFPageProxy_startRenderPage(transparency) {
- this.displayReadyPromise.resolve(transparency);
- },
- /**
- * For internal use only.
- * @ignore
- */
- _renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk) {
- // Add the new chunk to the current operator list.
- for (var i = 0, ii = operatorListChunk.length; i < ii; i++) {
- this.operatorList.fnArray.push(operatorListChunk.fnArray[i]);
- this.operatorList.argsArray.push(operatorListChunk.argsArray[i]);
- }
- this.operatorList.lastChunk = operatorListChunk.lastChunk;
- // Notify all the rendering tasks there are more operators to be consumed.
- for (var i = 0; i < this.renderTasks.length; i++) {
- this.renderTasks[i].operatorListChanged();
- }
- if (operatorListChunk.lastChunk) {
- this.receivingOperatorList = false;
- this._tryDestroy();
- }
- }
- };
- return PDFPageProxy;
- })();
- /**
- * For internal use only.
- * @ignore
- */
- var WorkerTransport = (function WorkerTransportClosure() {
- function WorkerTransport(workerInitializedPromise, workerReadyPromise,
- pdfDataRangeTransport, progressCallback) {
- this.pdfDataRangeTransport = pdfDataRangeTransport;
- this.workerReadyPromise = workerReadyPromise;
- this.progressCallback = progressCallback;
- this.commonObjs = new PDFObjects();
- this.pageCache = [];
- this.pagePromises = [];
- this.embeddedFontsUsed = false;
- this.passwordCallback = null;
- // If worker support isn't disabled explicit and the browser has worker
- // support, create a new web worker and test if it/the browser fullfills
- // all requirements to run parts of pdf.js in a web worker.
- // Right now, the requirement is, that an Uint8Array is still an Uint8Array
- // as it arrives on the worker. Chrome added this with version 15.
- if (!globalScope.PDFJS.disableWorker && typeof Worker !== 'undefined') {
- var workerSrc = PDFJS.workerSrc;
- if (!workerSrc) {
- error('No PDFJS.workerSrc specified');
- }
- try {
- // Some versions of FF can't create a worker on localhost, see:
- // https://bugzilla.mozilla.org/show_bug.cgi?id=683280
- var worker = new Worker(workerSrc);
- var messageHandler = new MessageHandler('main', worker);
- this.messageHandler = messageHandler;
- messageHandler.on('test', function transportTest(data) {
- var supportTypedArray = data && data.supportTypedArray;
- if (supportTypedArray) {
- this.worker = worker;
- if (!data.supportTransfers) {
- PDFJS.postMessageTransfers = false;
- }
- this.setupMessageHandler(messageHandler);
- workerInitializedPromise.resolve();
- } else {
- globalScope.PDFJS.disableWorker = true;
- this.loadFakeWorkerFiles().then(function() {
- this.setupFakeWorker();
- workerInitializedPromise.resolve();
- }.bind(this));
- }
- }.bind(this));
- var testObj = new Uint8Array([PDFJS.postMessageTransfers ? 255 : 0]);
- // Some versions of Opera throw a DATA_CLONE_ERR on serializing the
- // typed array. Also, checking if we can use transfers.
- try {
- messageHandler.send('test', testObj, null, [testObj.buffer]);
- } catch (ex) {
- info('Cannot use postMessage transfers');
- testObj[0] = 0;
- messageHandler.send('test', testObj);
- }
- return;
- } catch (e) {
- info('The worker has been disabled.');
- }
- }
- // Either workers are disabled, not supported or have thrown an exception.
- // Thus, we fallback to a faked worker.
- globalScope.PDFJS.disableWorker = true;
- this.loadFakeWorkerFiles().then(function() {
- this.setupFakeWorker();
- workerInitializedPromise.resolve();
- }.bind(this));
- }
- WorkerTransport.prototype = {
- destroy: function WorkerTransport_destroy() {
- this.pageCache = [];
- this.pagePromises = [];
- var self = this;
- this.messageHandler.send('Terminate', null, function () {
- FontLoader.clear();
- if (self.worker) {
- self.worker.terminate();
- }
- });
- },
- loadFakeWorkerFiles: function WorkerTransport_loadFakeWorkerFiles() {
- if (!PDFJS.fakeWorkerFilesLoadedPromise) {
- PDFJS.fakeWorkerFilesLoadedPromise = new LegacyPromise();
- // In the developer build load worker_loader which in turn loads all the
- // other files and resolves the promise. In production only the
- // pdf.worker.js file is needed.
- Util.loadScript(PDFJS.workerSrc, function() {
- PDFJS.fakeWorkerFilesLoadedPromise.resolve();
- });
- }
- return PDFJS.fakeWorkerFilesLoadedPromise;
- },
- setupFakeWorker: function WorkerTransport_setupFakeWorker() {
- warn('Setting up fake worker.');
- // If we don't use a worker, just post/sendMessage to the main thread.
- var fakeWorker = {
- postMessage: function WorkerTransport_postMessage(obj) {
- fakeWorker.onmessage({data: obj});
- },
- terminate: function WorkerTransport_terminate() {}
- };
- var messageHandler = new MessageHandler('main', fakeWorker);
- this.setupMessageHandler(messageHandler);
- // If the main thread is our worker, setup the handling for the messages
- // the main thread sends to it self.
- PDFJS.WorkerMessageHandler.setup(messageHandler);
- },
- setupMessageHandler:
- function WorkerTransport_setupMessageHandler(messageHandler) {
- this.messageHandler = messageHandler;
- function updatePassword(password) {
- messageHandler.send('UpdatePassword', password);
- }
- var pdfDataRangeTransport = this.pdfDataRangeTransport;
- if (pdfDataRangeTransport) {
- pdfDataRangeTransport.addRangeListener(function(begin, chunk) {
- messageHandler.send('OnDataRange', {
- begin: begin,
- chunk: chunk
- });
- });
- pdfDataRangeTransport.addProgressListener(function(loaded) {
- messageHandler.send('OnDataProgress', {
- loaded: loaded
- });
- });
- messageHandler.on('RequestDataRange',
- function transportDataRange(data) {
- pdfDataRangeTransport.requestDataRange(data.begin, data.end);
- }, this);
- }
- messageHandler.on('GetDoc', function transportDoc(data) {
- var pdfInfo = data.pdfInfo;
- var pdfDocument = new PDFDocumentProxy(pdfInfo, this);
- this.pdfDocument = pdfDocument;
- this.workerReadyPromise.resolve(pdfDocument);
- }, this);
- messageHandler.on('NeedPassword', function transportPassword(data) {
- if (this.passwordCallback) {
- return this.passwordCallback(updatePassword,
- PasswordResponses.NEED_PASSWORD);
- }
- this.workerReadyPromise.reject(data.exception.message, data.exception);
- }, this);
- messageHandler.on('IncorrectPassword', function transportBadPass(data) {
- if (this.passwordCallback) {
- return this.passwordCallback(updatePassword,
- PasswordResponses.INCORRECT_PASSWORD);
- }
- this.workerReadyPromise.reject(data.exception.message, data.exception);
- }, this);
- messageHandler.on('InvalidPDF', function transportInvalidPDF(data) {
- this.workerReadyPromise.reject(data.exception.name, data.exception);
- }, this);
- messageHandler.on('MissingPDF', function transportMissingPDF(data) {
- this.workerReadyPromise.reject(data.exception.message, data.exception);
- }, this);
- messageHandler.on('UnknownError', function transportUnknownError(data) {
- this.workerReadyPromise.reject(data.exception.message, data.exception);
- }, this);
- messageHandler.on('GetPage', function transportPage(data) {
- var pageInfo = data.pageInfo;
- var page = new PDFPageProxy(pageInfo, this);
- this.pageCache[pageInfo.pageIndex] = page;
- var promise = this.pagePromises[pageInfo.pageIndex];
- promise.resolve(page);
- }, this);
- messageHandler.on('GetAnnotations', function transportAnnotations(data) {
- var annotations = data.annotations;
- var promise = this.pageCache[data.pageIndex].annotationsPromise;
- promise.resolve(annotations);
- }, this);
- messageHandler.on('StartRenderPage', function transportRender(data) {
- var page = this.pageCache[data.pageIndex];
- page.stats.timeEnd('Page Request');
- page._startRenderPage(data.transparency);
- }, this);
- messageHandler.on('RenderPageChunk', function transportRender(data) {
- var page = this.pageCache[data.pageIndex];
- page._renderPageChunk(data.operatorList);
- }, this);
- messageHandler.on('commonobj', function transportObj(data) {
- var id = data[0];
- var type = data[1];
- if (this.commonObjs.hasData(id))
- return;
- switch (type) {
- case 'Font':
- var exportedData = data[2];
- var font;
- if ('error' in exportedData) {
- var error = exportedData.error;
- warn('Error during font loading: ' + error);
- this.commonObjs.resolve(id, error);
- break;
- } else {
- font = new FontFace(exportedData);
- }
- FontLoader.bind(
- [font],
- function fontReady(fontObjs) {
- this.commonObjs.resolve(id, font);
- }.bind(this)
- );
- break;
- case 'FontPath':
- this.commonObjs.resolve(id, data[2]);
- break;
- default:
- error('Got unknown common object type ' + type);
- }
- }, this);
- messageHandler.on('obj', function transportObj(data) {
- var id = data[0];
- var pageIndex = data[1];
- var type = data[2];
- var pageProxy = this.pageCache[pageIndex];
- if (pageProxy.objs.hasData(id))
- return;
- switch (type) {
- case 'JpegStream':
- var imageData = data[3];
- loadJpegStream(id, imageData, pageProxy.objs);
- break;
- case 'Image':
- var imageData = data[3];
- pageProxy.objs.resolve(id, imageData);
- // heuristics that will allow not to store large data
- var MAX_IMAGE_SIZE_TO_STORE = 8000000;
- if ('data' in imageData &&
- imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) {
- pageProxy.cleanupAfterRender = true;
- }
- break;
- default:
- error('Got unknown object type ' + type);
- }
- }, this);
- messageHandler.on('DocProgress', function transportDocProgress(data) {
- if (this.progressCallback) {
- this.progressCallback({
- loaded: data.loaded,
- total: data.total
- });
- }
- }, this);
- messageHandler.on('DocError', function transportDocError(data) {
- this.workerReadyPromise.reject(data);
- }, this);
- messageHandler.on('PageError', function transportError(data) {
- var page = this.pageCache[data.pageNum - 1];
- if (page.displayReadyPromise)
- page.displayReadyPromise.reject(data.error);
- else
- error(data.error);
- }, this);
- messageHandler.on('JpegDecode', function(data, deferred) {
- var imageUrl = data[0];
- var components = data[1];
- if (components != 3 && components != 1)
- error('Only 3 component or 1 component can be returned');
- var img = new Image();
- img.onload = (function messageHandler_onloadClosure() {
- var width = img.width;
- var height = img.height;
- var size = width * height;
- var rgbaLength = size * 4;
- var buf = new Uint8Array(size * components);
- var tmpCanvas = createScratchCanvas(width, height);
- var tmpCtx = tmpCanvas.getContext('2d');
- tmpCtx.drawImage(img, 0, 0);
- var data = tmpCtx.getImageData(0, 0, width, height).data;
- if (components == 3) {
- for (var i = 0, j = 0; i < rgbaLength; i += 4, j += 3) {
- buf[j] = data[i];
- buf[j + 1] = data[i + 1];
- buf[j + 2] = data[i + 2];
- }
- } else if (components == 1) {
- for (var i = 0, j = 0; i < rgbaLength; i += 4, j++) {
- buf[j] = data[i];
- }
- }
- deferred.resolve({ data: buf, width: width, height: height});
- }).bind(this);
- img.src = imageUrl;
- });
- },
- fetchDocument: function WorkerTransport_fetchDocument(source) {
- source.disableAutoFetch = PDFJS.disableAutoFetch;
- source.chunkedViewerLoading = !!this.pdfDataRangeTransport;
- this.messageHandler.send('GetDocRequest', {
- source: source,
- disableRange: PDFJS.disableRange,
- maxImageSize: PDFJS.maxImageSize,
- disableFontFace: PDFJS.disableFontFace,
- disableCreateObjectURL: PDFJS.disableCreateObjectURL,
- verbosity: PDFJS.verbosity
- });
- },
- getData: function WorkerTransport_getData(promise) {
- this.messageHandler.send('GetData', null, function(data) {
- promise.resolve(data);
- });
- },
- dataLoaded: function WorkerTransport_dataLoaded() {
- if (this.dataLoadedPromise) {
- return this.dataLoadedPromise;
- }
- var promise = new PDFJS.LegacyPromise();
- this.messageHandler.send('DataLoaded', null, function(args) {
- promise.resolve(args);
- });
- this.dataLoadedPromise = promise;
- return promise;
- },
- getPage: function WorkerTransport_getPage(pageNumber, promise) {
- var pageIndex = pageNumber - 1;
- if (pageIndex in this.pagePromises)
- return this.pagePromises[pageIndex];
- var promise = new PDFJS.LegacyPromise();
- this.pagePromises[pageIndex] = promise;
- this.messageHandler.send('GetPageRequest', { pageIndex: pageIndex });
- return promise;
- },
- getPageIndex: function WorkerTransport_getPageIndexByRef(ref) {
- var promise = new PDFJS.LegacyPromise();
- this.messageHandler.send('GetPageIndex', { ref: ref },
- function (pageIndex) {
- promise.resolve(pageIndex);
- }
- );
- return promise;
- },
- getAnnotations: function WorkerTransport_getAnnotations(pageIndex) {
- this.messageHandler.send('GetAnnotationsRequest',
- { pageIndex: pageIndex });
- },
- getDestinations: function WorkerTransport_getDestinations() {
- var promise = new PDFJS.LegacyPromise();
- this.messageHandler.send('GetDestinations', null,
- function transportDestinations(destinations) {
- promise.resolve(destinations);
- }
- );
- return promise;
- },
- startCleanup: function WorkerTransport_startCleanup() {
- this.messageHandler.send('Cleanup', null,
- function endCleanup() {
- for (var i = 0, ii = this.pageCache.length; i < ii; i++) {
- var page = this.pageCache[i];
- if (page) {
- page.destroy();
- }
- }
- this.commonObjs.clear();
- FontLoader.clear();
- }.bind(this)
- );
- }
- };
- return WorkerTransport;
- })();
- /**
- * A PDF document and page is built of many objects. E.g. there are objects
- * for fonts, images, rendering code and such. These objects might get processed
- * inside of a worker. The `PDFObjects` implements some basic functions to
- * manage these objects.
- * @ignore
- */
- var PDFObjects = (function PDFObjectsClosure() {
- function PDFObjects() {
- this.objs = {};
- }
- PDFObjects.prototype = {
- /**
- * Internal function.
- * Ensures there is an object defined for `objId`.
- */
- ensureObj: function PDFObjects_ensureObj(objId) {
- if (this.objs[objId])
- return this.objs[objId];
- var obj = {
- promise: new LegacyPromise(),
- data: null,
- resolved: false
- };
- this.objs[objId] = obj;
- return obj;
- },
- /**
- * If called *without* callback, this returns the data of `objId` but the
- * object needs to be resolved. If it isn't, this function throws.
- *
- * If called *with* a callback, the callback is called with the data of the
- * object once the object is resolved. That means, if you call this
- * function and the object is already resolved, the callback gets called
- * right away.
- */
- get: function PDFObjects_get(objId, callback) {
- // If there is a callback, then the get can be async and the object is
- // not required to be resolved right now
- if (callback) {
- this.ensureObj(objId).promise.then(callback);
- return null;
- }
- // If there isn't a callback, the user expects to get the resolved data
- // directly.
- var obj = this.objs[objId];
- // If there isn't an object yet or the object isn't resolved, then the
- // data isn't ready yet!
- if (!obj || !obj.resolved)
- error('Requesting object that isn\'t resolved yet ' + objId);
- return obj.data;
- },
- /**
- * Resolves the object `objId` with optional `data`.
- */
- resolve: function PDFObjects_resolve(objId, data) {
- var obj = this.ensureObj(objId);
- obj.resolved = true;
- obj.data = data;
- obj.promise.resolve(data);
- },
- isResolved: function PDFObjects_isResolved(objId) {
- var objs = this.objs;
- if (!objs[objId]) {
- return false;
- } else {
- return objs[objId].resolved;
- }
- },
- hasData: function PDFObjects_hasData(objId) {
- return this.isResolved(objId);
- },
- /**
- * Returns the data of `objId` if object exists, null otherwise.
- */
- getData: function PDFObjects_getData(objId) {
- var objs = this.objs;
- if (!objs[objId] || !objs[objId].resolved) {
- return null;
- } else {
- return objs[objId].data;
- }
- },
- clear: function PDFObjects_clear() {
- this.objs = {};
- }
- };
- return PDFObjects;
- })();
- /**
- * Allows controlling of the rendering tasks.
- * @class
- */
- var RenderTask = (function RenderTaskClosure() {
- function RenderTask(internalRenderTask) {
- this.internalRenderTask = internalRenderTask;
- /**
- * Promise for rendering task completion.
- * @type {Promise}
- */
- this.promise = new PDFJS.LegacyPromise();
- }
- RenderTask.prototype = /** @lends RenderTask.prototype */ {
- /**
- * Cancels the rendering task. If the task is currently rendering it will
- * not be cancelled until graphics pauses with a timeout. The promise that
- * this object extends will resolved when cancelled.
- */
- cancel: function RenderTask_cancel() {
- this.internalRenderTask.cancel();
- this.promise.reject(new Error('Rendering is cancelled'));
- }
- };
- return RenderTask;
- })();
- /**
- * For internal use only.
- * @ignore
- */
- var InternalRenderTask = (function InternalRenderTaskClosure() {
- function InternalRenderTask(callback, params, objs, commonObjs, operatorList,
- pageNumber) {
- this.callback = callback;
- this.params = params;
- this.objs = objs;
- this.commonObjs = commonObjs;
- this.operatorListIdx = null;
- this.operatorList = operatorList;
- this.pageNumber = pageNumber;
- this.running = false;
- this.graphicsReadyCallback = null;
- this.graphicsReady = false;
- this.cancelled = false;
- }
- InternalRenderTask.prototype = {
- initalizeGraphics:
- function InternalRenderTask_initalizeGraphics(transparency) {
- if (this.cancelled) {
- return;
- }
- if (PDFJS.pdfBug && 'StepperManager' in globalScope &&
- globalScope.StepperManager.enabled) {
- this.stepper = globalScope.StepperManager.create(this.pageNumber - 1);
- this.stepper.init(this.operatorList);
- this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();
- }
- var params = this.params;
- this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs,
- this.objs, params.textLayer,
- params.imageLayer);
- this.gfx.beginDrawing(params.viewport, transparency);
- this.operatorListIdx = 0;
- this.graphicsReady = true;
- if (this.graphicsReadyCallback) {
- this.graphicsReadyCallback();
- }
- },
- cancel: function InternalRenderTask_cancel() {
- this.running = false;
- this.cancelled = true;
- this.callback('cancelled');
- },
- operatorListChanged: function InternalRenderTask_operatorListChanged() {
- if (!this.graphicsReady) {
- if (!this.graphicsReadyCallback) {
- this.graphicsReadyCallback = this._continue.bind(this);
- }
- return;
- }
- if (this.stepper) {
- this.stepper.updateOperatorList(this.operatorList);
- }
- if (this.running) {
- return;
- }
- this._continue();
- },
- _continue: function InternalRenderTask__continue() {
- this.running = true;
- if (this.cancelled) {
- return;
- }
- if (this.params.continueCallback) {
- this.params.continueCallback(this._next.bind(this));
- } else {
- this._next();
- }
- },
- _next: function InternalRenderTask__next() {
- if (this.cancelled) {
- return;
- }
- this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList,
- this.operatorListIdx,
- this._continue.bind(this),
- this.stepper);
- if (this.operatorListIdx === this.operatorList.argsArray.length) {
- this.running = false;
- if (this.operatorList.lastChunk) {
- this.gfx.endDrawing();
- this.callback();
- }
- }
- }
- };
- return InternalRenderTask;
- })();
- var Metadata = PDFJS.Metadata = (function MetadataClosure() {
- function fixMetadata(meta) {
- return meta.replace(/>\\376\\377([^<]+)/g, function(all, codes) {
- var bytes = codes.replace(/\\([0-3])([0-7])([0-7])/g,
- function(code, d1, d2, d3) {
- return String.fromCharCode(d1 * 64 + d2 * 8 + d3 * 1);
- });
- var chars = '';
- for (var i = 0; i < bytes.length; i += 2) {
- var code = bytes.charCodeAt(i) * 256 + bytes.charCodeAt(i + 1);
- chars += code >= 32 && code < 127 && code != 60 && code != 62 &&
- code != 38 && false ? String.fromCharCode(code) :
- '&#x' + (0x10000 + code).toString(16).substring(1) + ';';
- }
- return '>' + chars;
- });
- }
- function Metadata(meta) {
- if (typeof meta === 'string') {
- // Ghostscript produces invalid metadata
- meta = fixMetadata(meta);
- var parser = new DOMParser();
- meta = parser.parseFromString(meta, 'application/xml');
- } else if (!(meta instanceof Document)) {
- error('Metadata: Invalid metadata object');
- }
- this.metaDocument = meta;
- this.metadata = {};
- this.parse();
- }
- Metadata.prototype = {
- parse: function Metadata_parse() {
- var doc = this.metaDocument;
- var rdf = doc.documentElement;
- if (rdf.nodeName.toLowerCase() !== 'rdf:rdf') { // Wrapped in <xmpmeta>
- rdf = rdf.firstChild;
- while (rdf && rdf.nodeName.toLowerCase() !== 'rdf:rdf')
- rdf = rdf.nextSibling;
- }
- var nodeName = (rdf) ? rdf.nodeName.toLowerCase() : null;
- if (!rdf || nodeName !== 'rdf:rdf' || !rdf.hasChildNodes())
- return;
- var children = rdf.childNodes, desc, entry, name, i, ii, length, iLength;
- for (i = 0, length = children.length; i < length; i++) {
- desc = children[i];
- if (desc.nodeName.toLowerCase() !== 'rdf:description')
- continue;
- for (ii = 0, iLength = desc.childNodes.length; ii < iLength; ii++) {
- if (desc.childNodes[ii].nodeName.toLowerCase() !== '#text') {
- entry = desc.childNodes[ii];
- name = entry.nodeName.toLowerCase();
- this.metadata[name] = entry.textContent.trim();
- }
- }
- }
- },
- get: function Metadata_get(name) {
- return this.metadata[name] || null;
- },
- has: function Metadata_has(name) {
- return typeof this.metadata[name] !== 'undefined';
- }
- };
- return Metadata;
- })();
- // <canvas> contexts store most of the state we need natively.
- // However, PDF needs a bit more state, which we store here.
- // Minimal font size that would be used during canvas fillText operations.
- var MIN_FONT_SIZE = 16;
- var COMPILE_TYPE3_GLYPHS = true;
- function createScratchCanvas(width, height) {
- var canvas = document.createElement('canvas');
- canvas.width = width;
- canvas.height = height;
- return canvas;
- }
- function addContextCurrentTransform(ctx) {
- // If the context doesn't expose a `mozCurrentTransform`, add a JS based on.
- if (!ctx.mozCurrentTransform) {
- // Store the original context
- ctx._scaleX = ctx._scaleX || 1.0;
- ctx._scaleY = ctx._scaleY || 1.0;
- ctx._originalSave = ctx.save;
- ctx._originalRestore = ctx.restore;
- ctx._originalRotate = ctx.rotate;
- ctx._originalScale = ctx.scale;
- ctx._originalTranslate = ctx.translate;
- ctx._originalTransform = ctx.transform;
- ctx._originalSetTransform = ctx.setTransform;
- ctx._transformMatrix = [ctx._scaleX, 0, 0, ctx._scaleY, 0, 0];
- ctx._transformStack = [];
- Object.defineProperty(ctx, 'mozCurrentTransform', {
- get: function getCurrentTransform() {
- return this._transformMatrix;
- }
- });
- Object.defineProperty(ctx, 'mozCurrentTransformInverse', {
- get: function getCurrentTransformInverse() {
- // Calculation done using WolframAlpha:
- // http://www.wolframalpha.com/input/?
- // i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}}
- var m = this._transformMatrix;
- var a = m[0], b = m[1], c = m[2], d = m[3], e = m[4], f = m[5];
- var ad_bc = a * d - b * c;
- var bc_ad = b * c - a * d;
- return [
- d / ad_bc,
- b / bc_ad,
- c / bc_ad,
- a / ad_bc,
- (d * e - c * f) / bc_ad,
- (b * e - a * f) / ad_bc
- ];
- }
- });
- ctx.save = function ctxSave() {
- var old = this._transformMatrix;
- this._transformStack.push(old);
- this._transformMatrix = old.slice(0, 6);
- this._originalSave();
- };
- ctx.restore = function ctxRestore() {
- var prev = this._transformStack.pop();
- if (prev) {
- this._transformMatrix = prev;
- this._originalRestore();
- }
- };
- ctx.translate = function ctxTranslate(x, y) {
- var m = this._transformMatrix;
- m[4] = m[0] * x + m[2] * y + m[4];
- m[5] = m[1] * x + m[3] * y + m[5];
- this._originalTranslate(x, y);
- };
- ctx.scale = function ctxScale(x, y) {
- var m = this._transformMatrix;
- m[0] = m[0] * x;
- m[1] = m[1] * x;
- m[2] = m[2] * y;
- m[3] = m[3] * y;
- this._originalScale(x, y);
- };
- ctx.transform = function ctxTransform(a, b, c, d, e, f) {
- var m = this._transformMatrix;
- this._transformMatrix = [
- m[0] * a + m[2] * b,
- m[1] * a + m[3] * b,
- m[0] * c + m[2] * d,
- m[1] * c + m[3] * d,
- m[0] * e + m[2] * f + m[4],
- m[1] * e + m[3] * f + m[5]
- ];
- ctx._originalTransform(a, b, c, d, e, f);
- };
- ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) {
- this._transformMatrix = [a, b, c, d, e, f];
- ctx._originalSetTransform(a, b, c, d, e, f);
- };
- ctx.rotate = function ctxRotate(angle) {
- var cosValue = Math.cos(angle);
- var sinValue = Math.sin(angle);
- var m = this._transformMatrix;
- this._transformMatrix = [
- m[0] * cosValue + m[2] * sinValue,
- m[1] * cosValue + m[3] * sinValue,
- m[0] * (-sinValue) + m[2] * cosValue,
- m[1] * (-sinValue) + m[3] * cosValue,
- m[4],
- m[5]
- ];
- this._originalRotate(angle);
- };
- }
- }
- var CachedCanvases = (function CachedCanvasesClosure() {
- var cache = {};
- return {
- getCanvas: function CachedCanvases_getCanvas(id, width, height,
- trackTransform) {
- var canvasEntry;
- if (id in cache) {
- canvasEntry = cache[id];
- canvasEntry.canvas.width = width;
- canvasEntry.canvas.height = height;
- // reset canvas transform for emulated mozCurrentTransform, if needed
- canvasEntry.context.setTransform(1, 0, 0, 1, 0, 0);
- } else {
- var canvas = createScratchCanvas(width, height);
- var ctx = canvas.getContext('2d');
- if (trackTransform) {
- addContextCurrentTransform(ctx);
- }
- cache[id] = canvasEntry = {canvas: canvas, context: ctx};
- }
- return canvasEntry;
- },
- clear: function () {
- cache = {};
- }
- };
- })();
- function compileType3Glyph(imgData) {
- var POINT_TO_PROCESS_LIMIT = 1000;
- var width = imgData.width, height = imgData.height;
- var i, j, j0, width1 = width + 1;
- var points = new Uint8Array(width1 * (height + 1));
- var POINT_TYPES =
- new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]);
- // decodes bit-packed mask data
- var lineSize = (width + 7) & ~7, data0 = imgData.data;
- var data = new Uint8Array(lineSize * height), pos = 0, ii;
- for (i = 0, ii = data0.length; i < ii; i++) {
- var mask = 128, elem = data0[i];
- while (mask > 0) {
- data[pos++] = (elem & mask) ? 0 : 255;
- mask >>= 1;
- }
- }
- // finding iteresting points: every point is located between mask pixels,
- // so there will be points of the (width + 1)x(height + 1) grid. Every point
- // will have flags assigned based on neighboring mask pixels:
- // 4 | 8
- // --P--
- // 2 | 1
- // We are interested only in points with the flags:
- // - outside corners: 1, 2, 4, 8;
- // - inside corners: 7, 11, 13, 14;
- // - and, intersections: 5, 10.
- var count = 0;
- pos = 0;
- if (data[pos] !== 0) {
- points[0] = 1;
- ++count;
- }
- for (j = 1; j < width; j++) {
- if (data[pos] !== data[pos + 1]) {
- points[j] = data[pos] ? 2 : 1;
- ++count;
- }
- pos++;
- }
- if (data[pos] !== 0) {
- points[j] = 2;
- ++count;
- }
- for (i = 1; i < height; i++) {
- pos = i * lineSize;
- j0 = i * width1;
- if (data[pos - lineSize] !== data[pos]) {
- points[j0] = data[pos] ? 1 : 8;
- ++count;
- }
- // 'sum' is the position of the current pixel configuration in the 'TYPES'
- // array (in order 8-1-2-4, so we can use '>>2' to shift the column).
- var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0);
- for (j = 1; j < width; j++) {
- sum = (sum >> 2) + (data[pos + 1] ? 4 : 0) +
- (data[pos - lineSize + 1] ? 8 : 0);
- if (POINT_TYPES[sum]) {
- points[j0 + j] = POINT_TYPES[sum];
- ++count;
- }
- pos++;
- }
- if (data[pos - lineSize] !== data[pos]) {
- points[j0 + j] = data[pos] ? 2 : 4;
- ++count;
- }
- if (count > POINT_TO_PROCESS_LIMIT) {
- return null;
- }
- }
- pos = lineSize * (height - 1);
- j0 = i * width1;
- if (data[pos] !== 0) {
- points[j0] = 8;
- ++count;
- }
- for (j = 1; j < width; j++) {
- if (data[pos] !== data[pos + 1]) {
- points[j0 + j] = data[pos] ? 4 : 8;
- ++count;
- }
- pos++;
- }
- if (data[pos] !== 0) {
- points[j0 + j] = 4;
- ++count;
- }
- if (count > POINT_TO_PROCESS_LIMIT) {
- return null;
- }
- // building outlines
- var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]);
- var outlines = [];
- for (i = 0; count && i <= height; i++) {
- var p = i * width1;
- var end = p + width;
- while (p < end && !points[p]) {
- p++;
- }
- if (p === end) {
- continue;
- }
- var coords = [p % width1, i];
- var type = points[p], p0 = p, pp;
- do {
- var step = steps[type];
- do { p += step; } while (!points[p]);
- pp = points[p];
- if (pp !== 5 && pp !== 10) {
- // set new direction
- type = pp;
- // delete mark
- points[p] = 0;
- } else { // type is 5 or 10, ie, a crossing
- // set new direction
- type = pp & ((0x33 * type) >> 4);
- // set new type for "future hit"
- points[p] &= (type >> 2 | type << 2);
- }
- coords.push(p % width1);
- coords.push((p / width1) | 0);
- --count;
- } while (p0 !== p);
- outlines.push(coords);
- --i;
- }
- var drawOutline = function(c) {
- c.save();
- // the path shall be painted in [0..1]x[0..1] space
- c.scale(1 / width, -1 / height);
- c.translate(0, -height);
- c.beginPath();
- for (var i = 0, ii = outlines.length; i < ii; i++) {
- var o = outlines[i];
- c.moveTo(o[0], o[1]);
- for (var j = 2, jj = o.length; j < jj; j += 2) {
- c.lineTo(o[j], o[j+1]);
- }
- }
- c.fill();
- c.beginPath();
- c.restore();
- };
- return drawOutline;
- }
- var CanvasExtraState = (function CanvasExtraStateClosure() {
- function CanvasExtraState(old) {
- // Are soft masks and alpha values shapes or opacities?
- this.alphaIsShape = false;
- this.fontSize = 0;
- this.fontSizeScale = 1;
- this.textMatrix = IDENTITY_MATRIX;
- this.fontMatrix = FONT_IDENTITY_MATRIX;
- this.leading = 0;
- // Current point (in user coordinates)
- this.x = 0;
- this.y = 0;
- // Start of text line (in text coordinates)
- this.lineX = 0;
- this.lineY = 0;
- // Character and word spacing
- this.charSpacing = 0;
- this.wordSpacing = 0;
- this.textHScale = 1;
- this.textRenderingMode = TextRenderingMode.FILL;
- this.textRise = 0;
- // Color spaces
- this.fillColorSpace = ColorSpace.singletons.gray;
- this.fillColorSpaceObj = null;
- this.strokeColorSpace = ColorSpace.singletons.gray;
- this.strokeColorSpaceObj = null;
- this.fillColorObj = null;
- this.strokeColorObj = null;
- // Default fore and background colors
- this.fillColor = '#000000';
- this.strokeColor = '#000000';
- // Note: fill alpha applies to all non-stroking operations
- this.fillAlpha = 1;
- this.strokeAlpha = 1;
- this.lineWidth = 1;
- this.activeSMask = null; // nonclonable field (see the save method below)
- this.old = old;
- }
- CanvasExtraState.prototype = {
- clone: function CanvasExtraState_clone() {
- return Object.create(this);
- },
- setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) {
- this.x = x;
- this.y = y;
- }
- };
- return CanvasExtraState;
- })();
- var CanvasGraphics = (function CanvasGraphicsClosure() {
- // Defines the time the executeOperatorList is going to be executing
- // before it stops and shedules a continue of execution.
- var EXECUTION_TIME = 15;
- function CanvasGraphics(canvasCtx, commonObjs, objs, textLayer, imageLayer) {
- this.ctx = canvasCtx;
- this.current = new CanvasExtraState();
- this.stateStack = [];
- this.pendingClip = null;
- this.pendingEOFill = false;
- this.res = null;
- this.xobjs = null;
- this.commonObjs = commonObjs;
- this.objs = objs;
- this.textLayer = textLayer;
- this.imageLayer = imageLayer;
- this.groupStack = [];
- this.processingType3 = null;
- // Patterns are painted relative to the initial page/form transform, see pdf
- // spec 8.7.2 NOTE 1.
- this.baseTransform = null;
- this.baseTransformStack = [];
- this.groupLevel = 0;
- this.smaskStack = [];
- this.smaskCounter = 0;
- this.tempSMask = null;
- if (canvasCtx) {
- addContextCurrentTransform(canvasCtx);
- }
- }
- function putBinaryImageData(ctx, imgData) {
- if (typeof ImageData !== 'undefined' && imgData instanceof ImageData) {
- ctx.putImageData(imgData, 0, 0);
- return;
- }
- // Put the image data to the canvas in chunks, rather than putting the
- // whole image at once. This saves JS memory, because the ImageData object
- // is smaller. It also possibly saves C++ memory within the implementation
- // of putImageData(). (E.g. in Firefox we make two short-lived copies of
- // the data passed to putImageData()). |n| shouldn't be too small, however,
- // because too many putImageData() calls will slow things down.
- var rowsInFullChunks = 16;
- var fullChunks = (imgData.height / rowsInFullChunks) | 0;
- var rowsInLastChunk = imgData.height - fullChunks * rowsInFullChunks;
- var elemsInFullChunks = imgData.width * rowsInFullChunks * 4;
- var elemsInLastChunk = imgData.width * rowsInLastChunk * 4;
- var chunkImgData = ctx.createImageData(imgData.width, rowsInFullChunks);
- var srcPos = 0;
- var src = imgData.data;
- var dst = chunkImgData.data;
- var haveSetAndSubarray = 'set' in dst && 'subarray' in src;
- // Do all the full-size chunks.
- for (var i = 0; i < fullChunks; i++) {
- if (haveSetAndSubarray) {
- dst.set(src.subarray(srcPos, srcPos + elemsInFullChunks));
- srcPos += elemsInFullChunks;
- } else {
- for (var j = 0; j < elemsInFullChunks; j++) {
- chunkImgData.data[j] = imgData.data[srcPos++];
- }
- }
- ctx.putImageData(chunkImgData, 0, i * rowsInFullChunks);
- }
- // Do the final, partial chunk, if required.
- if (rowsInLastChunk !== 0) {
- if (haveSetAndSubarray) {
- dst.set(src.subarray(srcPos, srcPos + elemsInLastChunk));
- srcPos += elemsInLastChunk;
- } else {
- for (var j = 0; j < elemsInLastChunk; j++) {
- chunkImgData.data[j] = imgData.data[srcPos++];
- }
- }
- // This (conceptually) puts pixels past the bounds of the canvas. But
- // that's ok; any such pixels are ignored.
- ctx.putImageData(chunkImgData, 0, fullChunks * rowsInFullChunks);
- }
- }
- function putBinaryImageMask(ctx, imgData) {
- var width = imgData.width, height = imgData.height;
- var tmpImgData = ctx.createImageData(width, height);
- var data = imgData.data;
- var tmpImgDataPixels = tmpImgData.data;
- var dataPos = 0;
- // Expand the mask so it can be used by the canvas. Any required inversion
- // has already been handled.
- var tmpPos = 3; // alpha component offset
- for (var i = 0; i < height; i++) {
- var mask = 0;
- for (var j = 0; j < width; j++) {
- if (!mask) {
- var elem = data[dataPos++];
- mask = 128;
- }
- if (!(elem & mask)) {
- tmpImgDataPixels[tmpPos] = 255;
- }
- tmpPos += 4;
- mask >>= 1;
- }
- }
- ctx.putImageData(tmpImgData, 0, 0);
- }
- function copyCtxState(sourceCtx, destCtx) {
- var properties = ['strokeStyle', 'fillStyle', 'fillRule', 'globalAlpha',
- 'lineWidth', 'lineCap', 'lineJoin', 'miterLimit',
- 'globalCompositeOperation', 'font'];
- for (var i = 0, ii = properties.length; i < ii; i++) {
- var property = properties[i];
- if (property in sourceCtx) {
- destCtx[property] = sourceCtx[property];
- }
- }
- if ('setLineDash' in sourceCtx) {
- destCtx.setLineDash(sourceCtx.getLineDash());
- destCtx.lineDashOffset = sourceCtx.lineDashOffset;
- } else if ('mozDash' in sourceCtx) {
- destCtx.mozDash = sourceCtx.mozDash;
- destCtx.mozDashOffset = sourceCtx.mozDashOffset;
- }
- }
- function composeSMask(ctx, smask, layerCtx) {
- var mask = smask.canvas;
- var maskCtx = smask.context;
- var width = mask.width, height = mask.height;
- var addBackdropFn;
- if (smask.backdrop) {
- var cs = smask.colorSpace || ColorSpace.singletons.rgb;
- var backdrop = cs.getRgb(smask.backdrop, 0);
- addBackdropFn = function (r0, g0, b0, bytes) {
- var length = bytes.length;
- for (var i = 3; i < length; i += 4) {
- var alpha = bytes[i] / 255;
- if (alpha === 0) {
- bytes[i - 3] = r0;
- bytes[i - 2] = g0;
- bytes[i - 1] = b0;
- } else if (alpha < 1) {
- var alpha_ = 1 - alpha;
- bytes[i - 3] = (bytes[i - 3] * alpha + r0 * alpha_) | 0;
- bytes[i - 2] = (bytes[i - 2] * alpha + g0 * alpha_) | 0;
- bytes[i - 1] = (bytes[i - 1] * alpha + b0 * alpha_) | 0;
- }
- }
- }.bind(null, backdrop[0], backdrop[1], backdrop[2]);
- } else {
- addBackdropFn = function () {};
- }
- var composeFn;
- if (smask.subtype === 'Luminosity') {
- composeFn = function (maskDataBytes, layerDataBytes) {
- var length = maskDataBytes.length;
- for (var i = 3; i < length; i += 4) {
- var y = ((maskDataBytes[i - 3] * 77) + // * 0.3 / 255 * 0x10000
- (maskDataBytes[i - 2] * 152) + // * 0.59 ....
- (maskDataBytes[i - 1] * 28)) | 0; // * 0.11 ....
- layerDataBytes[i] = (layerDataBytes[i] * y) >> 16;
- }
- };
- } else {
- composeFn = function (maskDataBytes, layerDataBytes) {
- var length = maskDataBytes.length;
- for (var i = 3; i < length; i += 4) {
- var alpha = maskDataBytes[i];
- layerDataBytes[i] = (layerDataBytes[i] * alpha / 255) | 0;
- }
- };
- }
- // processing image in chunks to save memory
- var chunkSize = 16;
- for (var row = 0; row < height; row += chunkSize) {
- var chunkHeight = Math.min(chunkSize, height - row);
- var maskData = maskCtx.getImageData(0, row, width, chunkHeight);
- var layerData = layerCtx.getImageData(0, row, width, chunkHeight);
- addBackdropFn(maskData.data);
- composeFn(maskData.data, layerData.data);
- maskCtx.putImageData(layerData, 0, row);
- }
- ctx.setTransform(1, 0, 0, 1, 0, 0);
- ctx.drawImage(mask, smask.offsetX, smask.offsetY);
- }
- var LINE_CAP_STYLES = ['butt', 'round', 'square'];
- var LINE_JOIN_STYLES = ['miter', 'round', 'bevel'];
- var NORMAL_CLIP = {};
- var EO_CLIP = {};
- CanvasGraphics.prototype = {
- beginDrawing: function CanvasGraphics_beginDrawing(viewport, transparency) {
- // For pdfs that use blend modes we have to clear the canvas else certain
- // blend modes can look wrong since we'd be blending with a white
- // backdrop. The problem with a transparent backdrop though is we then
- // don't get sub pixel anti aliasing on text, so we fill with white if
- // we can.
- var width = this.ctx.canvas.width;
- var height = this.ctx.canvas.height;
- if (transparency) {
- this.ctx.clearRect(0, 0, width, height);
- } else {
- this.ctx.mozOpaque = true;
- this.ctx.save();
- this.ctx.fillStyle = 'rgb(255, 255, 255)';
- this.ctx.fillRect(0, 0, width, height);
- this.ctx.restore();
- }
- var transform = viewport.transform;
- this.baseTransform = transform.slice();
- this.ctx.save();
- this.ctx.transform.apply(this.ctx, transform);
- if (this.textLayer) {
- this.textLayer.beginLayout();
- }
- if (this.imageLayer) {
- this.imageLayer.beginLayout();
- }
- },
- executeOperatorList: function CanvasGraphics_executeOperatorList(
- operatorList,
- executionStartIdx, continueCallback,
- stepper) {
- var argsArray = operatorList.argsArray;
- var fnArray = operatorList.fnArray;
- var i = executionStartIdx || 0;
- var argsArrayLen = argsArray.length;
- // Sometimes the OperatorList to execute is empty.
- if (argsArrayLen == i) {
- return i;
- }
- var executionEndIdx;
- var endTime = Date.now() + EXECUTION_TIME;
- var commonObjs = this.commonObjs;
- var objs = this.objs;
- var fnId;
- var deferred = Promise.resolve();
- while (true) {
- if (stepper && i === stepper.nextBreakPoint) {
- stepper.breakIt(i, continueCallback);
- return i;
- }
- fnId = fnArray[i];
- if (fnId !== OPS.dependency) {
- this[fnId].apply(this, argsArray[i]);
- } else {
- var deps = argsArray[i];
- for (var n = 0, nn = deps.length; n < nn; n++) {
- var depObjId = deps[n];
- var common = depObjId.substring(0, 2) == 'g_';
- // If the promise isn't resolved yet, add the continueCallback
- // to the promise and bail out.
- if (!common && !objs.isResolved(depObjId)) {
- objs.get(depObjId, continueCallback);
- return i;
- }
- if (common && !commonObjs.isResolved(depObjId)) {
- commonObjs.get(depObjId, continueCallback);
- return i;
- }
- }
- }
- i++;
- // If the entire operatorList was executed, stop as were done.
- if (i == argsArrayLen) {
- return i;
- }
- // If the execution took longer then a certain amount of time, schedule
- // to continue exeution after a short delay.
- // However, this is only possible if a 'continueCallback' is passed in.
- if (continueCallback && Date.now() > endTime) {
- deferred.then(continueCallback);
- return i;
- }
- // If the operatorList isn't executed completely yet OR the execution
- // time was short enough, do another execution round.
- }
- },
- endDrawing: function CanvasGraphics_endDrawing() {
- this.ctx.restore();
- CachedCanvases.clear();
- if (this.textLayer) {
- this.textLayer.endLayout();
- }
- if (this.imageLayer) {
- this.imageLayer.endLayout();
- }
- },
- // Graphics state
- setLineWidth: function CanvasGraphics_setLineWidth(width) {
- this.current.lineWidth = width;
- this.ctx.lineWidth = width;
- },
- setLineCap: function CanvasGraphics_setLineCap(style) {
- this.ctx.lineCap = LINE_CAP_STYLES[style];
- },
- setLineJoin: function CanvasGraphics_setLineJoin(style) {
- this.ctx.lineJoin = LINE_JOIN_STYLES[style];
- },
- setMiterLimit: function CanvasGraphics_setMiterLimit(limit) {
- this.ctx.miterLimit = limit;
- },
- setDash: function CanvasGraphics_setDash(dashArray, dashPhase) {
- var ctx = this.ctx;
- if ('setLineDash' in ctx) {
- ctx.setLineDash(dashArray);
- ctx.lineDashOffset = dashPhase;
- } else {
- ctx.mozDash = dashArray;
- ctx.mozDashOffset = dashPhase;
- }
- },
- setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) {
- // Maybe if we one day fully support color spaces this will be important
- // for now we can ignore.
- // TODO set rendering intent?
- },
- setFlatness: function CanvasGraphics_setFlatness(flatness) {
- // There's no way to control this with canvas, but we can safely ignore.
- // TODO set flatness?
- },
- setGState: function CanvasGraphics_setGState(states) {
- for (var i = 0, ii = states.length; i < ii; i++) {
- var state = states[i];
- var key = state[0];
- var value = state[1];
- switch (key) {
- case 'LW':
- this.setLineWidth(value);
- break;
- case 'LC':
- this.setLineCap(value);
- break;
- case 'LJ':
- this.setLineJoin(value);
- break;
- case 'ML':
- this.setMiterLimit(value);
- break;
- case 'D':
- this.setDash(value[0], value[1]);
- break;
- case 'RI':
- this.setRenderingIntent(value);
- break;
- case 'FL':
- this.setFlatness(value);
- break;
- case 'Font':
- this.setFont(value[0], value[1]);
- break;
- case 'CA':
- this.current.strokeAlpha = state[1];
- break;
- case 'ca':
- this.current.fillAlpha = state[1];
- this.ctx.globalAlpha = state[1];
- break;
- case 'BM':
- if (value && value.name && (value.name !== 'Normal')) {
- var mode = value.name.replace(/([A-Z])/g,
- function(c) {
- return '-' + c.toLowerCase();
- }
- ).substring(1);
- this.ctx.globalCompositeOperation = mode;
- if (this.ctx.globalCompositeOperation !== mode) {
- warn('globalCompositeOperation "' + mode +
- '" is not supported');
- }
- } else {
- this.ctx.globalCompositeOperation = 'source-over';
- }
- break;
- case 'SMask':
- if (this.current.activeSMask) {
- this.endSMaskGroup();
- }
- this.current.activeSMask = value ? this.tempSMask : null;
- if (this.current.activeSMask) {
- this.beginSMaskGroup();
- }
- this.tempSMask = null;
- break;
- }
- }
- },
- beginSMaskGroup: function CanvasGraphics_beginSMaskGroup() {
- var activeSMask = this.current.activeSMask;
- var drawnWidth = activeSMask.canvas.width;
- var drawnHeight = activeSMask.canvas.height;
- var cacheId = 'smaskGroupAt' + this.groupLevel;
- var scratchCanvas = CachedCanvases.getCanvas(
- cacheId, drawnWidth, drawnHeight, true);
- var currentCtx = this.ctx;
- var currentTransform = currentCtx.mozCurrentTransform;
- this.ctx.save();
- var groupCtx = scratchCanvas.context;
- groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY);
- groupCtx.transform.apply(groupCtx, currentTransform);
- copyCtxState(currentCtx, groupCtx);
- this.ctx = groupCtx;
- this.setGState([
- ['BM', 'Normal'],
- ['ca', 1],
- ['CA', 1]
- ]);
- this.groupStack.push(currentCtx);
- this.groupLevel++;
- },
- endSMaskGroup: function CanvasGraphics_endSMaskGroup() {
- var groupCtx = this.ctx;
- this.groupLevel--;
- this.ctx = this.groupStack.pop();
- composeSMask(this.ctx, this.current.activeSMask, groupCtx);
- this.ctx.restore();
- },
- save: function CanvasGraphics_save() {
- this.ctx.save();
- var old = this.current;
- this.stateStack.push(old);
- this.current = old.clone();
- if (this.current.activeSMask) {
- this.current.activeSMask = null;
- }
- },
- restore: function CanvasGraphics_restore() {
- var prev = this.stateStack.pop();
- if (prev) {
- if (this.current.activeSMask) {
- this.endSMaskGroup();
- }
- this.current = prev;
- this.ctx.restore();
- }
- },
- transform: function CanvasGraphics_transform(a, b, c, d, e, f) {
- this.ctx.transform(a, b, c, d, e, f);
- },
- // Path
- moveTo: function CanvasGraphics_moveTo(x, y) {
- this.ctx.moveTo(x, y);
- this.current.setCurrentPoint(x, y);
- },
- lineTo: function CanvasGraphics_lineTo(x, y) {
- this.ctx.lineTo(x, y);
- this.current.setCurrentPoint(x, y);
- },
- curveTo: function CanvasGraphics_curveTo(x1, y1, x2, y2, x3, y3) {
- this.ctx.bezierCurveTo(x1, y1, x2, y2, x3, y3);
- this.current.setCurrentPoint(x3, y3);
- },
- curveTo2: function CanvasGraphics_curveTo2(x2, y2, x3, y3) {
- var current = this.current;
- this.ctx.bezierCurveTo(current.x, current.y, x2, y2, x3, y3);
- current.setCurrentPoint(x3, y3);
- },
- curveTo3: function CanvasGraphics_curveTo3(x1, y1, x3, y3) {
- this.curveTo(x1, y1, x3, y3, x3, y3);
- this.current.setCurrentPoint(x3, y3);
- },
- closePath: function CanvasGraphics_closePath() {
- this.ctx.closePath();
- },
- rectangle: function CanvasGraphics_rectangle(x, y, width, height) {
- this.ctx.rect(x, y, width, height);
- },
- stroke: function CanvasGraphics_stroke(consumePath) {
- consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
- var ctx = this.ctx;
- var strokeColor = this.current.strokeColor;
- if (this.current.lineWidth === 0)
- ctx.lineWidth = this.getSinglePixelWidth();
- // For stroke we want to temporarily change the global alpha to the
- // stroking alpha.
- ctx.globalAlpha = this.current.strokeAlpha;
- if (strokeColor && strokeColor.hasOwnProperty('type') &&
- strokeColor.type === 'Pattern') {
- // for patterns, we transform to pattern space, calculate
- // the pattern, call stroke, and restore to user space
- ctx.save();
- ctx.strokeStyle = strokeColor.getPattern(ctx, this);
- ctx.stroke();
- ctx.restore();
- } else {
- ctx.stroke();
- }
- if (consumePath)
- this.consumePath();
- // Restore the global alpha to the fill alpha
- ctx.globalAlpha = this.current.fillAlpha;
- },
- closeStroke: function CanvasGraphics_closeStroke() {
- this.closePath();
- this.stroke();
- },
- fill: function CanvasGraphics_fill(consumePath) {
- consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
- var ctx = this.ctx;
- var fillColor = this.current.fillColor;
- var needRestore = false;
- if (fillColor && fillColor.hasOwnProperty('type') &&
- fillColor.type === 'Pattern') {
- ctx.save();
- ctx.fillStyle = fillColor.getPattern(ctx, this);
- needRestore = true;
- }
- if (this.pendingEOFill) {
- if ('mozFillRule' in this.ctx) {
- this.ctx.mozFillRule = 'evenodd';
- this.ctx.fill();
- this.ctx.mozFillRule = 'nonzero';
- } else {
- try {
- this.ctx.fill('evenodd');
- } catch (ex) {
- // shouldn't really happen, but browsers might think differently
- this.ctx.fill();
- }
- }
- this.pendingEOFill = false;
- } else {
- this.ctx.fill();
- }
- if (needRestore) {
- ctx.restore();
- }
- if (consumePath) {
- this.consumePath();
- }
- },
- eoFill: function CanvasGraphics_eoFill() {
- this.pendingEOFill = true;
- this.fill();
- },
- fillStroke: function CanvasGraphics_fillStroke() {
- this.fill(false);
- this.stroke(false);
- this.consumePath();
- },
- eoFillStroke: function CanvasGraphics_eoFillStroke() {
- this.pendingEOFill = true;
- this.fillStroke();
- },
- closeFillStroke: function CanvasGraphics_closeFillStroke() {
- this.closePath();
- this.fillStroke();
- },
- closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() {
- this.pendingEOFill = true;
- this.closePath();
- this.fillStroke();
- },
- endPath: function CanvasGraphics_endPath() {
- this.consumePath();
- },
- // Clipping
- clip: function CanvasGraphics_clip() {
- this.pendingClip = NORMAL_CLIP;
- },
- eoClip: function CanvasGraphics_eoClip() {
- this.pendingClip = EO_CLIP;
- },
- // Text
- beginText: function CanvasGraphics_beginText() {
- this.current.textMatrix = IDENTITY_MATRIX;
- this.current.x = this.current.lineX = 0;
- this.current.y = this.current.lineY = 0;
- },
- endText: function CanvasGraphics_endText() {
- if (!('pendingTextPaths' in this)) {
- this.ctx.beginPath();
- return;
- }
- var paths = this.pendingTextPaths;
- var ctx = this.ctx;
- ctx.save();
- ctx.beginPath();
- for (var i = 0; i < paths.length; i++) {
- var path = paths[i];
- ctx.setTransform.apply(ctx, path.transform);
- ctx.translate(path.x, path.y);
- path.addToPath(ctx, path.fontSize);
- }
- ctx.restore();
- ctx.clip();
- ctx.beginPath();
- delete this.pendingTextPaths;
- },
- setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) {
- this.current.charSpacing = spacing;
- },
- setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) {
- this.current.wordSpacing = spacing;
- },
- setHScale: function CanvasGraphics_setHScale(scale) {
- this.current.textHScale = scale / 100;
- },
- setLeading: function CanvasGraphics_setLeading(leading) {
- this.current.leading = -leading;
- },
- setFont: function CanvasGraphics_setFont(fontRefName, size) {
- var fontObj = this.commonObjs.get(fontRefName);
- var current = this.current;
- if (!fontObj)
- error('Can\'t find font for ' + fontRefName);
- current.fontMatrix = fontObj.fontMatrix ? fontObj.fontMatrix :
- FONT_IDENTITY_MATRIX;
- // A valid matrix needs all main diagonal elements to be non-zero
- // This also ensures we bypass FF bugzilla bug #719844.
- if (current.fontMatrix[0] === 0 ||
- current.fontMatrix[3] === 0) {
- warn('Invalid font matrix for font ' + fontRefName);
- }
- // The spec for Tf (setFont) says that 'size' specifies the font 'scale',
- // and in some docs this can be negative (inverted x-y axes).
- if (size < 0) {
- size = -size;
- current.fontDirection = -1;
- } else {
- current.fontDirection = 1;
- }
- this.current.font = fontObj;
- this.current.fontSize = size;
- if (fontObj.coded)
- return; // we don't need ctx.font for Type3 fonts
- var name = fontObj.loadedName || 'sans-serif';
- var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') :
- (fontObj.bold ? 'bold' : 'normal');
- var italic = fontObj.italic ? 'italic' : 'normal';
- var typeface = '"' + name + '", ' + fontObj.fallbackName;
- // Some font backends cannot handle fonts below certain size.
- // Keeping the font at minimal size and using the fontSizeScale to change
- // the current transformation matrix before the fillText/strokeText.
- // See https://bugzilla.mozilla.org/show_bug.cgi?id=726227
- var browserFontSize = size >= MIN_FONT_SIZE ? size : MIN_FONT_SIZE;
- this.current.fontSizeScale = browserFontSize != MIN_FONT_SIZE ? 1.0 :
- size / MIN_FONT_SIZE;
- var rule = italic + ' ' + bold + ' ' + browserFontSize + 'px ' + typeface;
- this.ctx.font = rule;
- },
- setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) {
- this.current.textRenderingMode = mode;
- },
- setTextRise: function CanvasGraphics_setTextRise(rise) {
- this.current.textRise = rise;
- },
- moveText: function CanvasGraphics_moveText(x, y) {
- this.current.x = this.current.lineX += x;
- this.current.y = this.current.lineY += y;
- },
- setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) {
- this.setLeading(-y);
- this.moveText(x, y);
- },
- setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) {
- this.current.textMatrix = [a, b, c, d, e, f];
- this.current.x = this.current.lineX = 0;
- this.current.y = this.current.lineY = 0;
- },
- nextLine: function CanvasGraphics_nextLine() {
- this.moveText(0, this.current.leading);
- },
- applyTextTransforms: function CanvasGraphics_applyTextTransforms() {
- var ctx = this.ctx;
- var current = this.current;
- ctx.transform.apply(ctx, current.textMatrix);
- ctx.translate(current.x, current.y + current.textRise);
- if (current.fontDirection > 0) {
- ctx.scale(current.textHScale, -1);
- } else {
- ctx.scale(-current.textHScale, 1);
- }
- },
- createTextGeometry: function CanvasGraphics_createTextGeometry() {
- var geometry = {};
- var ctx = this.ctx;
- var font = this.current.font;
- var ctxMatrix = ctx.mozCurrentTransform;
- var a = ctxMatrix[0], b = ctxMatrix[1], c = ctxMatrix[2];
- var d = ctxMatrix[3], e = ctxMatrix[4], f = ctxMatrix[5];
- var sx = (a >= 0) ?
- Math.sqrt((a * a) + (b * b)) : -Math.sqrt((a * a) + (b * b));
- var sy = (d >= 0) ?
- Math.sqrt((c * c) + (d * d)) : -Math.sqrt((c * c) + (d * d));
- var angle = Math.atan2(b, a);
- var x = e;
- var y = f;
- geometry.x = x;
- geometry.y = y;
- geometry.hScale = sx;
- geometry.vScale = sy;
- geometry.angle = angle;
- geometry.spaceWidth = font.spaceWidth;
- geometry.fontName = font.loadedName;
- geometry.fontFamily = font.fallbackName;
- geometry.fontSize = this.current.fontSize;
- geometry.ascent = font.ascent;
- geometry.descent = font.descent;
- return geometry;
- },
- paintChar: function (character, x, y) {
- var ctx = this.ctx;
- var current = this.current;
- var font = current.font;
- var fontSize = current.fontSize / current.fontSizeScale;
- var textRenderingMode = current.textRenderingMode;
- var fillStrokeMode = textRenderingMode &
- TextRenderingMode.FILL_STROKE_MASK;
- var isAddToPathSet = !!(textRenderingMode &
- TextRenderingMode.ADD_TO_PATH_FLAG);
- var addToPath;
- if (font.disableFontFace || isAddToPathSet) {
- addToPath = font.getPathGenerator(this.commonObjs, character);
- }
- if (font.disableFontFace) {
- ctx.save();
- ctx.translate(x, y);
- ctx.beginPath();
- addToPath(ctx, fontSize);
- if (fillStrokeMode === TextRenderingMode.FILL ||
- fillStrokeMode === TextRenderingMode.FILL_STROKE) {
- ctx.fill();
- }
- if (fillStrokeMode === TextRenderingMode.STROKE ||
- fillStrokeMode === TextRenderingMode.FILL_STROKE) {
- ctx.stroke();
- }
- ctx.restore();
- } else {
- if (fillStrokeMode === TextRenderingMode.FILL ||
- fillStrokeMode === TextRenderingMode.FILL_STROKE) {
- ctx.fillText(character, x, y);
- }
- if (fillStrokeMode === TextRenderingMode.STROKE ||
- fillStrokeMode === TextRenderingMode.FILL_STROKE) {
- ctx.strokeText(character, x, y);
- }
- }
- if (isAddToPathSet) {
- var paths = this.pendingTextPaths || (this.pendingTextPaths = []);
- paths.push({
- transform: ctx.mozCurrentTransform,
- x: x,
- y: y,
- fontSize: fontSize,
- addToPath: addToPath
- });
- }
- },
- get isFontSubpixelAAEnabled() {
- // Checks if anti-aliasing is enabled when scaled text is painted.
- // On Windows GDI scaled fonts looks bad.
- var ctx = document.createElement('canvas').getContext('2d');
- ctx.scale(1.5, 1);
- ctx.fillText('I', 0, 10);
- var data = ctx.getImageData(0, 0, 10, 10).data;
- var enabled = false;
- for (var i = 3; i < data.length; i += 4) {
- if (data[i] > 0 && data[i] < 255) {
- enabled = true;
- break;
- }
- }
- return shadow(this, 'isFontSubpixelAAEnabled', enabled);
- },
- showText: function CanvasGraphics_showText(glyphs, skipTextSelection) {
- var ctx = this.ctx;
- var current = this.current;
- var font = current.font;
- var fontSize = current.fontSize;
- var fontSizeScale = current.fontSizeScale;
- var charSpacing = current.charSpacing;
- var wordSpacing = current.wordSpacing;
- var textHScale = current.textHScale * current.fontDirection;
- var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX;
- var glyphsLength = glyphs.length;
- var textLayer = this.textLayer;
- var geom;
- var textSelection = textLayer && !skipTextSelection ? true : false;
- var canvasWidth = 0.0;
- var vertical = font.vertical;
- var defaultVMetrics = font.defaultVMetrics;
- // Type3 fonts - each glyph is a "mini-PDF"
- if (font.coded) {
- ctx.save();
- ctx.transform.apply(ctx, current.textMatrix);
- ctx.translate(current.x, current.y);
- ctx.scale(textHScale, 1);
- if (textSelection) {
- this.save();
- ctx.scale(1, -1);
- geom = this.createTextGeometry();
- this.restore();
- }
- for (var i = 0; i < glyphsLength; ++i) {
- var glyph = glyphs[i];
- if (glyph === null) {
- // word break
- this.ctx.translate(wordSpacing, 0);
- current.x += wordSpacing * textHScale;
- continue;
- }
- this.processingType3 = glyph;
- this.save();
- ctx.scale(fontSize, fontSize);
- ctx.transform.apply(ctx, fontMatrix);
- this.executeOperatorList(glyph.operatorList);
- this.restore();
- var transformed = Util.applyTransform([glyph.width, 0], fontMatrix);
- var width = (transformed[0] * fontSize + charSpacing) *
- current.fontDirection;
- ctx.translate(width, 0);
- current.x += width * textHScale;
- canvasWidth += width;
- }
- ctx.restore();
- this.processingType3 = null;
- } else {
- ctx.save();
- this.applyTextTransforms();
- var lineWidth = current.lineWidth;
- var a1 = current.textMatrix[0], b1 = current.textMatrix[1];
- var scale = Math.sqrt(a1 * a1 + b1 * b1);
- if (scale === 0 || lineWidth === 0)
- lineWidth = this.getSinglePixelWidth();
- else
- lineWidth /= scale;
- if (textSelection)
- geom = this.createTextGeometry();
- if (fontSizeScale != 1.0) {
- ctx.scale(fontSizeScale, fontSizeScale);
- lineWidth /= fontSizeScale;
- }
- ctx.lineWidth = lineWidth;
- var x = 0;
- for (var i = 0; i < glyphsLength; ++i) {
- var glyph = glyphs[i];
- if (glyph === null) {
- // word break
- x += current.fontDirection * wordSpacing;
- continue;
- }
- var restoreNeeded = false;
- var character = glyph.fontChar;
- var vmetric = glyph.vmetric || defaultVMetrics;
- if (vertical) {
- var vx = glyph.vmetric ? vmetric[1] : glyph.width * 0.5;
- vx = -vx * fontSize * current.fontMatrix[0];
- var vy = vmetric[2] * fontSize * current.fontMatrix[0];
- }
- var width = vmetric ? -vmetric[0] : glyph.width;
- var charWidth = width * fontSize * current.fontMatrix[0] +
- charSpacing * current.fontDirection;
- var accent = glyph.accent;
- var scaledX, scaledY, scaledAccentX, scaledAccentY;
- if (!glyph.disabled) {
- if (vertical) {
- scaledX = vx / fontSizeScale;
- scaledY = (x + vy) / fontSizeScale;
- } else {
- scaledX = x / fontSizeScale;
- scaledY = 0;
- }
- if (font.remeasure && width > 0 && this.isFontSubpixelAAEnabled) {
- // some standard fonts may not have the exact width, trying to
- // rescale per character
- var measuredWidth = ctx.measureText(character).width * 1000 /
- current.fontSize * current.fontSizeScale;
- var characterScaleX = width / measuredWidth;
- restoreNeeded = true;
- ctx.save();
- ctx.scale(characterScaleX, 1);
- scaledX /= characterScaleX;
- if (accent) {
- scaledAccentX /= characterScaleX;
- }
- }
- this.paintChar(character, scaledX, scaledY);
- if (accent) {
- scaledAccentX = scaledX + accent.offset.x / fontSizeScale;
- scaledAccentY = scaledY - accent.offset.y / fontSizeScale;
- this.paintChar(accent.fontChar, scaledAccentX, scaledAccentY);
- }
- }
- x += charWidth;
- canvasWidth += charWidth;
- if (restoreNeeded) {
- ctx.restore();
- }
- }
- if (vertical) {
- current.y -= x * textHScale;
- } else {
- current.x += x * textHScale;
- }
- ctx.restore();
- }
- if (textSelection) {
- geom.canvasWidth = canvasWidth;
- if (vertical) {
- var VERTICAL_TEXT_ROTATION = Math.PI / 2;
- geom.angle += VERTICAL_TEXT_ROTATION;
- }
- this.textLayer.appendText(geom);
- }
- return canvasWidth;
- },
- showSpacedText: function CanvasGraphics_showSpacedText(arr) {
- var ctx = this.ctx;
- var current = this.current;
- var font = current.font;
- var fontSize = current.fontSize;
- // TJ array's number is independent from fontMatrix
- var textHScale = current.textHScale * 0.001 * current.fontDirection;
- var arrLength = arr.length;
- var textLayer = this.textLayer;
- var geom;
- var canvasWidth = 0.0;
- var textSelection = textLayer ? true : false;
- var vertical = font.vertical;
- var spacingAccumulator = 0;
- if (textSelection) {
- ctx.save();
- this.applyTextTransforms();
- geom = this.createTextGeometry();
- ctx.restore();
- }
- for (var i = 0; i < arrLength; ++i) {
- var e = arr[i];
- if (isNum(e)) {
- var spacingLength = -e * fontSize * textHScale;
- if (vertical) {
- current.y += spacingLength;
- } else {
- current.x += spacingLength;
- }
- if (textSelection)
- spacingAccumulator += spacingLength;
- } else {
- var shownCanvasWidth = this.showText(e, true);
- if (textSelection) {
- canvasWidth += spacingAccumulator + shownCanvasWidth;
- spacingAccumulator = 0;
- }
- }
- }
- if (textSelection) {
- geom.canvasWidth = canvasWidth;
- if (vertical) {
- var VERTICAL_TEXT_ROTATION = Math.PI / 2;
- geom.angle += VERTICAL_TEXT_ROTATION;
- }
- this.textLayer.appendText(geom);
- }
- },
- nextLineShowText: function CanvasGraphics_nextLineShowText(text) {
- this.nextLine();
- this.showText(text);
- },
- nextLineSetSpacingShowText:
- function CanvasGraphics_nextLineSetSpacingShowText(wordSpacing,
- charSpacing,
- text) {
- this.setWordSpacing(wordSpacing);
- this.setCharSpacing(charSpacing);
- this.nextLineShowText(text);
- },
- // Type3 fonts
- setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) {
- // We can safely ignore this since the width should be the same
- // as the width in the Widths array.
- },
- setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(xWidth,
- yWidth,
- llx,
- lly,
- urx,
- ury) {
- // TODO According to the spec we're also suppose to ignore any operators
- // that set color or include images while processing this type3 font.
- this.rectangle(llx, lly, urx - llx, ury - lly);
- this.clip();
- this.endPath();
- },
- // Color
- setStrokeColorSpace: function CanvasGraphics_setStrokeColorSpace(raw) {
- this.current.strokeColorSpace = ColorSpace.fromIR(raw);
- },
- setFillColorSpace: function CanvasGraphics_setFillColorSpace(raw) {
- this.current.fillColorSpace = ColorSpace.fromIR(raw);
- },
- setStrokeColor: function CanvasGraphics_setStrokeColor(/*...*/) {
- var cs = this.current.strokeColorSpace;
- var rgbColor = cs.getRgb(arguments, 0);
- var color = Util.makeCssRgb(rgbColor);
- this.ctx.strokeStyle = color;
- this.current.strokeColor = color;
- },
- getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR, cs) {
- if (IR[0] == 'TilingPattern') {
- var args = IR[1];
- var base = cs.base;
- var color;
- if (base) {
- var baseComps = base.numComps;
- color = base.getRgb(args, 0);
- }
- var pattern = new TilingPattern(IR, color, this.ctx, this.objs,
- this.commonObjs, this.baseTransform);
- } else if (IR[0] == 'RadialAxial' || IR[0] == 'Dummy') {
- var pattern = getShadingPatternFromIR(IR);
- } else {
- error('Unkown IR type ' + IR[0]);
- }
- return pattern;
- },
- setStrokeColorN: function CanvasGraphics_setStrokeColorN(/*...*/) {
- var cs = this.current.strokeColorSpace;
- if (cs.name == 'Pattern') {
- this.current.strokeColor = this.getColorN_Pattern(arguments, cs);
- } else {
- this.setStrokeColor.apply(this, arguments);
- }
- },
- setFillColor: function CanvasGraphics_setFillColor(/*...*/) {
- var cs = this.current.fillColorSpace;
- var rgbColor = cs.getRgb(arguments, 0);
- var color = Util.makeCssRgb(rgbColor);
- this.ctx.fillStyle = color;
- this.current.fillColor = color;
- },
- setFillColorN: function CanvasGraphics_setFillColorN(/*...*/) {
- var cs = this.current.fillColorSpace;
- if (cs.name == 'Pattern') {
- this.current.fillColor = this.getColorN_Pattern(arguments, cs);
- } else {
- this.setFillColor.apply(this, arguments);
- }
- },
- setStrokeGray: function CanvasGraphics_setStrokeGray(gray) {
- this.current.strokeColorSpace = ColorSpace.singletons.gray;
- var rgbColor = this.current.strokeColorSpace.getRgb(arguments, 0);
- var color = Util.makeCssRgb(rgbColor);
- this.ctx.strokeStyle = color;
- this.current.strokeColor = color;
- },
- setFillGray: function CanvasGraphics_setFillGray(gray) {
- this.current.fillColorSpace = ColorSpace.singletons.gray;
- var rgbColor = this.current.fillColorSpace.getRgb(arguments, 0);
- var color = Util.makeCssRgb(rgbColor);
- this.ctx.fillStyle = color;
- this.current.fillColor = color;
- },
- setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) {
- this.current.strokeColorSpace = ColorSpace.singletons.rgb;
- var rgbColor = this.current.strokeColorSpace.getRgb(arguments, 0);
- var color = Util.makeCssRgb(rgbColor);
- this.ctx.strokeStyle = color;
- this.current.strokeColor = color;
- },
- setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) {
- this.current.fillColorSpace = ColorSpace.singletons.rgb;
- var rgbColor = this.current.fillColorSpace.getRgb(arguments, 0);
- var color = Util.makeCssRgb(rgbColor);
- this.ctx.fillStyle = color;
- this.current.fillColor = color;
- },
- setStrokeCMYKColor: function CanvasGraphics_setStrokeCMYKColor(c, m, y, k) {
- this.current.strokeColorSpace = ColorSpace.singletons.cmyk;
- var color = Util.makeCssCmyk(arguments);
- this.ctx.strokeStyle = color;
- this.current.strokeColor = color;
- },
- setFillCMYKColor: function CanvasGraphics_setFillCMYKColor(c, m, y, k) {
- this.current.fillColorSpace = ColorSpace.singletons.cmyk;
- var color = Util.makeCssCmyk(arguments);
- this.ctx.fillStyle = color;
- this.current.fillColor = color;
- },
- shadingFill: function CanvasGraphics_shadingFill(patternIR) {
- var ctx = this.ctx;
- this.save();
- var pattern = getShadingPatternFromIR(patternIR);
- ctx.fillStyle = pattern.getPattern(ctx, this);
- var inv = ctx.mozCurrentTransformInverse;
- if (inv) {
- var canvas = ctx.canvas;
- var width = canvas.width;
- var height = canvas.height;
- var bl = Util.applyTransform([0, 0], inv);
- var br = Util.applyTransform([0, height], inv);
- var ul = Util.applyTransform([width, 0], inv);
- var ur = Util.applyTransform([width, height], inv);
- var x0 = Math.min(bl[0], br[0], ul[0], ur[0]);
- var y0 = Math.min(bl[1], br[1], ul[1], ur[1]);
- var x1 = Math.max(bl[0], br[0], ul[0], ur[0]);
- var y1 = Math.max(bl[1], br[1], ul[1], ur[1]);
- this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0);
- } else {
- // HACK to draw the gradient onto an infinite rectangle.
- // PDF gradients are drawn across the entire image while
- // Canvas only allows gradients to be drawn in a rectangle
- // The following bug should allow us to remove this.
- // https://bugzilla.mozilla.org/show_bug.cgi?id=664884
- this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10);
- }
- this.restore();
- },
- // Images
- beginInlineImage: function CanvasGraphics_beginInlineImage() {
- error('Should not call beginInlineImage');
- },
- beginImageData: function CanvasGraphics_beginImageData() {
- error('Should not call beginImageData');
- },
- paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(matrix,
- bbox) {
- this.save();
- this.baseTransformStack.push(this.baseTransform);
- if (matrix && isArray(matrix) && 6 == matrix.length)
- this.transform.apply(this, matrix);
- this.baseTransform = this.ctx.mozCurrentTransform;
- if (bbox && isArray(bbox) && 4 == bbox.length) {
- var width = bbox[2] - bbox[0];
- var height = bbox[3] - bbox[1];
- this.rectangle(bbox[0], bbox[1], width, height);
- this.clip();
- this.endPath();
- }
- },
- paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() {
- this.restore();
- this.baseTransform = this.baseTransformStack.pop();
- },
- beginGroup: function CanvasGraphics_beginGroup(group) {
- this.save();
- var currentCtx = this.ctx;
- // TODO non-isolated groups - according to Rik at adobe non-isolated
- // group results aren't usually that different and they even have tools
- // that ignore this setting. Notes from Rik on implmenting:
- // - When you encounter an transparency group, create a new canvas with
- // the dimensions of the bbox
- // - copy the content from the previous canvas to the new canvas
- // - draw as usual
- // - remove the backdrop alpha:
- // alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha
- // value of your transparency group and 'alphaBackdrop' the alpha of the
- // backdrop
- // - remove background color:
- // colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew)
- if (!group.isolated) {
- info('TODO: Support non-isolated groups.');
- }
- // TODO knockout - supposedly possible with the clever use of compositing
- // modes.
- if (group.knockout) {
- warn('Knockout groups not supported.');
- }
- var currentTransform = currentCtx.mozCurrentTransform;
- if (group.matrix) {
- currentCtx.transform.apply(currentCtx, group.matrix);
- }
- assert(group.bbox, 'Bounding box is required.');
- // Based on the current transform figure out how big the bounding box
- // will actually be.
- var bounds = Util.getAxialAlignedBoundingBox(
- group.bbox,
- currentCtx.mozCurrentTransform);
- // Clip the bounding box to the current canvas.
- var canvasBounds = [0,
- 0,
- currentCtx.canvas.width,
- currentCtx.canvas.height];
- bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0];
- // Use ceil in case we're between sizes so we don't create canvas that is
- // too small and make the canvas at least 1x1 pixels.
- var drawnWidth = Math.max(Math.ceil(bounds[2] - bounds[0]), 1);
- var drawnHeight = Math.max(Math.ceil(bounds[3] - bounds[1]), 1);
- var cacheId = 'groupAt' + this.groupLevel;
- if (group.smask) {
- // Using two cache entries is case if masks are used one after another.
- cacheId += '_smask_' + ((this.smaskCounter++) % 2);
- }
- var scratchCanvas = CachedCanvases.getCanvas(
- cacheId, drawnWidth, drawnHeight, true);
- var groupCtx = scratchCanvas.context;
- // Since we created a new canvas that is just the size of the bounding box
- // we have to translate the group ctx.
- var offsetX = bounds[0];
- var offsetY = bounds[1];
- groupCtx.translate(-offsetX, -offsetY);
- groupCtx.transform.apply(groupCtx, currentTransform);
- if (group.smask) {
- // Saving state and cached mask to be used in setGState.
- this.smaskStack.push({
- canvas: scratchCanvas.canvas,
- context: groupCtx,
- offsetX: offsetX,
- offsetY: offsetY,
- subtype: group.smask.subtype,
- backdrop: group.smask.backdrop,
- colorSpace: group.colorSpace && ColorSpace.fromIR(group.colorSpace)
- });
- } else {
- // Setup the current ctx so when the group is popped we draw it at the
- // right location.
- currentCtx.setTransform(1, 0, 0, 1, 0, 0);
- currentCtx.translate(offsetX, offsetY);
- }
- // The transparency group inherits all off the current graphics state
- // except the blend mode, soft mask, and alpha constants.
- copyCtxState(currentCtx, groupCtx);
- this.ctx = groupCtx;
- this.setGState([
- ['BM', 'Normal'],
- ['ca', 1],
- ['CA', 1]
- ]);
- this.groupStack.push(currentCtx);
- this.groupLevel++;
- },
- endGroup: function CanvasGraphics_endGroup(group) {
- this.groupLevel--;
- var groupCtx = this.ctx;
- this.ctx = this.groupStack.pop();
- // Turn off image smoothing to avoid sub pixel interpolation which can
- // look kind of blurry for some pdfs.
- if ('imageSmoothingEnabled' in this.ctx) {
- this.ctx.imageSmoothingEnabled = false;
- } else {
- this.ctx.mozImageSmoothingEnabled = false;
- }
- if (group.smask) {
- this.tempSMask = this.smaskStack.pop();
- } else {
- this.ctx.drawImage(groupCtx.canvas, 0, 0);
- }
- this.restore();
- },
- beginAnnotations: function CanvasGraphics_beginAnnotations() {
- this.save();
- this.current = new CanvasExtraState();
- },
- endAnnotations: function CanvasGraphics_endAnnotations() {
- this.restore();
- },
- beginAnnotation: function CanvasGraphics_beginAnnotation(rect, transform,
- matrix) {
- this.save();
- if (rect && isArray(rect) && 4 == rect.length) {
- var width = rect[2] - rect[0];
- var height = rect[3] - rect[1];
- this.rectangle(rect[0], rect[1], width, height);
- this.clip();
- this.endPath();
- }
- this.transform.apply(this, transform);
- this.transform.apply(this, matrix);
- },
- endAnnotation: function CanvasGraphics_endAnnotation() {
- this.restore();
- },
- paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) {
- var domImage = this.objs.get(objId);
- if (!domImage) {
- error('Dependent image isn\'t ready yet');
- }
- this.save();
- var ctx = this.ctx;
- // scale the image to the unit square
- ctx.scale(1 / w, -1 / h);
- ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height,
- 0, -h, w, h);
- if (this.imageLayer) {
- var currentTransform = ctx.mozCurrentTransformInverse;
- var position = this.getCanvasPosition(0, 0);
- this.imageLayer.appendImage({
- objId: objId,
- left: position[0],
- top: position[1],
- width: w / currentTransform[0],
- height: h / currentTransform[3]
- });
- }
- this.restore();
- },
- paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) {
- var ctx = this.ctx;
- var width = img.width, height = img.height;
- var glyph = this.processingType3;
- if (COMPILE_TYPE3_GLYPHS && glyph && !('compiled' in glyph)) {
- var MAX_SIZE_TO_COMPILE = 1000;
- if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) {
- glyph.compiled =
- compileType3Glyph({data: img.data, width: width, height: height});
- } else {
- glyph.compiled = null;
- }
- }
- if (glyph && glyph.compiled) {
- glyph.compiled(ctx);
- return;
- }
- var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height);
- var maskCtx = maskCanvas.context;
- maskCtx.save();
- putBinaryImageMask(maskCtx, img);
- maskCtx.globalCompositeOperation = 'source-in';
- var fillColor = this.current.fillColor;
- maskCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') &&
- fillColor.type === 'Pattern') ?
- fillColor.getPattern(maskCtx, this) : fillColor;
- maskCtx.fillRect(0, 0, width, height);
- maskCtx.restore();
- this.paintInlineImageXObject(maskCanvas.canvas);
- },
- paintImageMaskXObjectGroup:
- function CanvasGraphics_paintImageMaskXObjectGroup(images) {
- var ctx = this.ctx;
- for (var i = 0, ii = images.length; i < ii; i++) {
- var image = images[i];
- var width = image.width, height = image.height;
- var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height);
- var maskCtx = maskCanvas.context;
- maskCtx.save();
- putBinaryImageMask(maskCtx, image);
- maskCtx.globalCompositeOperation = 'source-in';
- var fillColor = this.current.fillColor;
- maskCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') &&
- fillColor.type === 'Pattern') ?
- fillColor.getPattern(maskCtx, this) : fillColor;
- maskCtx.fillRect(0, 0, width, height);
- maskCtx.restore();
- ctx.save();
- ctx.transform.apply(ctx, image.transform);
- ctx.scale(1, -1);
- ctx.drawImage(maskCanvas.canvas, 0, 0, width, height,
- 0, -1, 1, 1);
- ctx.restore();
- }
- },
- paintImageXObject: function CanvasGraphics_paintImageXObject(objId) {
- var imgData = this.objs.get(objId);
- if (!imgData)
- error('Dependent image isn\'t ready yet');
- this.paintInlineImageXObject(imgData);
- },
- paintInlineImageXObject:
- function CanvasGraphics_paintInlineImageXObject(imgData) {
- var width = imgData.width;
- var height = imgData.height;
- var ctx = this.ctx;
- this.save();
- // scale the image to the unit square
- ctx.scale(1 / width, -1 / height);
- var currentTransform = ctx.mozCurrentTransformInverse;
- var a = currentTransform[0], b = currentTransform[1];
- var widthScale = Math.max(Math.sqrt(a * a + b * b), 1);
- var c = currentTransform[2], d = currentTransform[3];
- var heightScale = Math.max(Math.sqrt(c * c + d * d), 1);
- var imgToPaint;
- // instanceof HTMLElement does not work in jsdom node.js module
- if (imgData instanceof HTMLElement || !imgData.data) {
- imgToPaint = imgData;
- } else {
- var tmpCanvas = CachedCanvases.getCanvas('inlineImage', width, height);
- var tmpCtx = tmpCanvas.context;
- putBinaryImageData(tmpCtx, imgData);
- imgToPaint = tmpCanvas.canvas;
- }
- var paintWidth = width, paintHeight = height;
- var tmpCanvasId = 'prescale1';
- // Vertial or horizontal scaling shall not be more than 2 to not loose the
- // pixels during drawImage operation, painting on the temporary canvas(es)
- // that are twice smaller in size
- while ((widthScale > 2 && paintWidth > 1) ||
- (heightScale > 2 && paintHeight > 1)) {
- var newWidth = paintWidth, newHeight = paintHeight;
- if (widthScale > 2 && paintWidth > 1) {
- newWidth = Math.ceil(paintWidth / 2);
- widthScale /= paintWidth / newWidth;
- }
- if (heightScale > 2 && paintHeight > 1) {
- newHeight = Math.ceil(paintHeight / 2);
- heightScale /= paintHeight / newHeight;
- }
- var tmpCanvas = CachedCanvases.getCanvas(tmpCanvasId,
- newWidth, newHeight);
- tmpCtx = tmpCanvas.context;
- tmpCtx.clearRect(0, 0, newWidth, newHeight);
- tmpCtx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight,
- 0, 0, newWidth, newHeight);
- imgToPaint = tmpCanvas.canvas;
- paintWidth = newWidth;
- paintHeight = newHeight;
- tmpCanvasId = tmpCanvasId === 'prescale1' ? 'prescale2' : 'prescale1';
- }
- ctx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight,
- 0, -height, width, height);
- if (this.imageLayer) {
- var position = this.getCanvasPosition(0, -height);
- this.imageLayer.appendImage({
- imgData: imgData,
- left: position[0],
- top: position[1],
- width: width / currentTransform[0],
- height: height / currentTransform[3]
- });
- }
- this.restore();
- },
- paintInlineImageXObjectGroup:
- function CanvasGraphics_paintInlineImageXObjectGroup(imgData, map) {
- var ctx = this.ctx;
- var w = imgData.width;
- var h = imgData.height;
- var tmpCanvas = CachedCanvases.getCanvas('inlineImage', w, h);
- var tmpCtx = tmpCanvas.context;
- putBinaryImageData(tmpCtx, imgData);
- for (var i = 0, ii = map.length; i < ii; i++) {
- var entry = map[i];
- ctx.save();
- ctx.transform.apply(ctx, entry.transform);
- ctx.scale(1, -1);
- ctx.drawImage(tmpCanvas.canvas, entry.x, entry.y, entry.w, entry.h,
- 0, -1, 1, 1);
- if (this.imageLayer) {
- var position = this.getCanvasPosition(entry.x, entry.y);
- this.imageLayer.appendImage({
- imgData: imgData,
- left: position[0],
- top: position[1],
- width: w,
- height: h
- });
- }
- ctx.restore();
- }
- },
- // Marked content
- markPoint: function CanvasGraphics_markPoint(tag) {
- // TODO Marked content.
- },
- markPointProps: function CanvasGraphics_markPointProps(tag, properties) {
- // TODO Marked content.
- },
- beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) {
- // TODO Marked content.
- },
- beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps(
- tag, properties) {
- // TODO Marked content.
- },
- endMarkedContent: function CanvasGraphics_endMarkedContent() {
- // TODO Marked content.
- },
- // Compatibility
- beginCompat: function CanvasGraphics_beginCompat() {
- // TODO ignore undefined operators (should we do that anyway?)
- },
- endCompat: function CanvasGraphics_endCompat() {
- // TODO stop ignoring undefined operators
- },
- // Helper functions
- consumePath: function CanvasGraphics_consumePath() {
- if (this.pendingClip) {
- if (this.pendingClip == EO_CLIP) {
- if ('mozFillRule' in this.ctx) {
- this.ctx.mozFillRule = 'evenodd';
- this.ctx.clip();
- this.ctx.mozFillRule = 'nonzero';
- } else {
- try {
- this.ctx.clip('evenodd');
- } catch (ex) {
- // shouldn't really happen, but browsers might think differently
- this.ctx.clip();
- }
- }
- } else {
- this.ctx.clip();
- }
- this.pendingClip = null;
- }
- this.ctx.beginPath();
- },
- getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) {
- var inverse = this.ctx.mozCurrentTransformInverse;
- // max of the current horizontal and vertical scale
- return Math.sqrt(Math.max(
- (inverse[0] * inverse[0] + inverse[1] * inverse[1]),
- (inverse[2] * inverse[2] + inverse[3] * inverse[3])));
- },
- getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) {
- var transform = this.ctx.mozCurrentTransform;
- return [
- transform[0] * x + transform[2] * y + transform[4],
- transform[1] * x + transform[3] * y + transform[5]
- ];
- }
- };
- for (var op in OPS) {
- CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op];
- }
- return CanvasGraphics;
- })();
- var ShadingIRs = {};
- ShadingIRs.RadialAxial = {
- fromIR: function RadialAxial_fromIR(raw) {
- var type = raw[1];
- var colorStops = raw[2];
- var p0 = raw[3];
- var p1 = raw[4];
- var r0 = raw[5];
- var r1 = raw[6];
- return {
- type: 'Pattern',
- getPattern: function RadialAxial_getPattern(ctx) {
- var grad;
- if (type === 'axial') {
- grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);
- } else if (type === 'radial') {
- grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1);
- }
- for (var i = 0, ii = colorStops.length; i < ii; ++i) {
- var c = colorStops[i];
- grad.addColorStop(c[0], c[1]);
- }
- return grad;
- }
- };
- }
- };
- ShadingIRs.Dummy = {
- fromIR: function Dummy_fromIR() {
- return {
- type: 'Pattern',
- getPattern: function Dummy_fromIR_getPattern() {
- return 'hotpink';
- }
- };
- }
- };
- function getShadingPatternFromIR(raw) {
- return ShadingIRs[raw[0]].fromIR(raw);
- }
- var TilingPattern = (function TilingPatternClosure() {
- var PaintType = {
- COLORED: 1,
- UNCOLORED: 2
- };
- var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough
- function TilingPattern(IR, color, ctx, objs, commonObjs, baseTransform) {
- this.name = IR[1][0].name;
- this.operatorList = IR[2];
- this.matrix = IR[3] || [1, 0, 0, 1, 0, 0];
- this.bbox = IR[4];
- this.xstep = IR[5];
- this.ystep = IR[6];
- this.paintType = IR[7];
- this.tilingType = IR[8];
- this.color = color;
- this.objs = objs;
- this.commonObjs = commonObjs;
- this.baseTransform = baseTransform;
- this.type = 'Pattern';
- this.ctx = ctx;
- }
- TilingPattern.prototype = {
- createPatternCanvas: function TilinPattern_createPatternCanvas(owner) {
- var operatorList = this.operatorList;
- var bbox = this.bbox;
- var xstep = this.xstep;
- var ystep = this.ystep;
- var paintType = this.paintType;
- var tilingType = this.tilingType;
- var color = this.color;
- var objs = this.objs;
- var commonObjs = this.commonObjs;
- var ctx = this.ctx;
- info('TilingType: ' + tilingType);
- var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3];
- var topLeft = [x0, y0];
- // we want the canvas to be as large as the step size
- var botRight = [x0 + xstep, y0 + ystep];
- var width = botRight[0] - topLeft[0];
- var height = botRight[1] - topLeft[1];
- // Obtain scale from matrix and current transformation matrix.
- var matrixScale = Util.singularValueDecompose2dScale(this.matrix);
- var curMatrixScale = Util.singularValueDecompose2dScale(
- this.baseTransform);
- var combinedScale = [matrixScale[0] * curMatrixScale[0],
- matrixScale[1] * curMatrixScale[1]];
- // MAX_PATTERN_SIZE is used to avoid OOM situation.
- // Use width and height values that are as close as possible to the end
- // result when the pattern is used. Too low value makes the pattern look
- // blurry. Too large value makes it look too crispy.
- width = Math.min(Math.ceil(Math.abs(width * combinedScale[0])),
- MAX_PATTERN_SIZE);
- height = Math.min(Math.ceil(Math.abs(height * combinedScale[1])),
- MAX_PATTERN_SIZE);
- var tmpCanvas = CachedCanvases.getCanvas('pattern', width, height, true);
- var tmpCtx = tmpCanvas.context;
- var graphics = new CanvasGraphics(tmpCtx, commonObjs, objs);
- graphics.groupLevel = owner.groupLevel;
- this.setFillAndStrokeStyleToContext(tmpCtx, paintType, color);
- this.setScale(width, height, xstep, ystep);
- this.transformToScale(graphics);
- // transform coordinates to pattern space
- var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]];
- graphics.transform.apply(graphics, tmpTranslate);
- this.clipBbox(graphics, bbox, x0, y0, x1, y1);
- graphics.executeOperatorList(operatorList);
- return tmpCanvas.canvas;
- },
- setScale: function TilingPattern_setScale(width, height, xstep, ystep) {
- this.scale = [width / xstep, height / ystep];
- },
- transformToScale: function TilingPattern_transformToScale(graphics) {
- var scale = this.scale;
- var tmpScale = [scale[0], 0, 0, scale[1], 0, 0];
- graphics.transform.apply(graphics, tmpScale);
- },
- scaleToContext: function TilingPattern_scaleToContext() {
- var scale = this.scale;
- this.ctx.scale(1 / scale[0], 1 / scale[1]);
- },
- clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) {
- if (bbox && isArray(bbox) && 4 == bbox.length) {
- var bboxWidth = x1 - x0;
- var bboxHeight = y1 - y0;
- graphics.rectangle(x0, y0, bboxWidth, bboxHeight);
- graphics.clip();
- graphics.endPath();
- }
- },
- setFillAndStrokeStyleToContext:
- function setFillAndStrokeStyleToContext(context, paintType, color) {
- switch (paintType) {
- case PaintType.COLORED:
- var ctx = this.ctx;
- context.fillStyle = ctx.fillStyle;
- context.strokeStyle = ctx.strokeStyle;
- break;
- case PaintType.UNCOLORED:
- var rgbColor = ColorSpace.singletons.rgb.getRgb(color, 0);
- var cssColor = Util.makeCssRgb(rgbColor);
- context.fillStyle = cssColor;
- context.strokeStyle = cssColor;
- break;
- default:
- error('Unsupported paint type: ' + paintType);
- }
- },
- getPattern: function TilingPattern_getPattern(ctx, owner) {
- var temporaryPatternCanvas = this.createPatternCanvas(owner);
- var ctx = this.ctx;
- ctx.setTransform.apply(ctx, this.baseTransform);
- ctx.transform.apply(ctx, this.matrix);
- this.scaleToContext();
- return ctx.createPattern(temporaryPatternCanvas, 'repeat');
- }
- };
- return TilingPattern;
- })();
- PDFJS.disableFontFace = false;
- var FontLoader = {
- insertRule: function fontLoaderInsertRule(rule) {
- var styleElement = document.getElementById('PDFJS_FONT_STYLE_TAG');
- if (!styleElement) {
- styleElement = document.createElement('style');
- styleElement.id = 'PDFJS_FONT_STYLE_TAG';
- document.documentElement.getElementsByTagName('head')[0].appendChild(
- styleElement);
- }
- var styleSheet = styleElement.sheet;
- styleSheet.insertRule(rule, styleSheet.cssRules.length);
- },
- clear: function fontLoaderClear() {
- var styleElement = document.getElementById('PDFJS_FONT_STYLE_TAG');
- if (styleElement) {
- styleElement.parentNode.removeChild(styleElement);
- }
- },
- get loadTestFont() {
- // This is a CFF font with 1 glyph for '.' that fills its entire width and
- // height.
- return shadow(this, 'loadTestFont', atob(
- 'T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQAFQ' +
- 'AABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAAALwA' +
- 'AAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgAAAAGbm' +
- 'FtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1AAsD6AAA' +
- 'AADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD6AAAAAAD6A' +
- 'ABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACMAooCvAAAAeAA' +
- 'MQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4DIP84AFoDIQAAAA' +
- 'AAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAAAAEAAQAAAAEAAAAA' +
- 'AAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUAAQAAAAEAAAAAAAYAAQ' +
- 'AAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgABAAMAAQQJAAMAAgABAAMA' +
- 'AQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABYAAAAAAAAAwAAAAMAAAAcAA' +
- 'EAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAAAC7////TAAEAAAAAAAABBgAA' +
- 'AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAA' +
- 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
- 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
- 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
- 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAA' +
- 'AAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAAAAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgc' +
- 'A/gXBIwMAYuL+nz5tQXkD5j3CBLnEQACAQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWF' +
- 'hYWFhYWFhYAAABAQAADwACAQEEE/t3Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQA' +
- 'AAAAAAABAAAAAMmJbzEAAAAAzgTjFQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAg' +
- 'ABAAAAAAAAAAAD6AAAAAAAAA=='
- ));
- },
- loadTestFontId: 0,
- loadingContext: {
- requests: [],
- nextRequestId: 0
- },
- isSyncFontLoadingSupported: (function detectSyncFontLoadingSupport() {
- if (isWorker)
- return false;
- // User agent string sniffing is bad, but there is no reliable way to tell
- // if font is fully loaded and ready to be used with canvas.
- var userAgent = window.navigator.userAgent;
- var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(userAgent);
- if (m && m[1] >= 14)
- return true;
- // TODO other browsers
- return false;
- })(),
- bind: function fontLoaderBind(fonts, callback) {
- assert(!isWorker, 'bind() shall be called from main thread');
- var rules = [], fontsToLoad = [];
- for (var i = 0, ii = fonts.length; i < ii; i++) {
- var font = fonts[i];
- // Add the font to the DOM only once or skip if the font
- // is already loaded.
- if (font.attached || font.loading === false) {
- continue;
- }
- font.attached = true;
- var rule = font.bindDOM();
- if (rule) {
- rules.push(rule);
- fontsToLoad.push(font);
- }
- }
- var request = FontLoader.queueLoadingCallback(callback);
- if (rules.length > 0 && !this.isSyncFontLoadingSupported) {
- FontLoader.prepareFontLoadEvent(rules, fontsToLoad, request);
- } else {
- request.complete();
- }
- },
- queueLoadingCallback: function FontLoader_queueLoadingCallback(callback) {
- function LoadLoader_completeRequest() {
- assert(!request.end, 'completeRequest() cannot be called twice');
- request.end = Date.now();
- // sending all completed requests in order how they were queued
- while (context.requests.length > 0 && context.requests[0].end) {
- var otherRequest = context.requests.shift();
- setTimeout(otherRequest.callback, 0);
- }
- }
- var context = FontLoader.loadingContext;
- var requestId = 'pdfjs-font-loading-' + (context.nextRequestId++);
- var request = {
- id: requestId,
- complete: LoadLoader_completeRequest,
- callback: callback,
- started: Date.now()
- };
- context.requests.push(request);
- return request;
- },
- prepareFontLoadEvent: function fontLoaderPrepareFontLoadEvent(rules,
- fonts,
- request) {
- /** Hack begin */
- // There's currently no event when a font has finished downloading so the
- // following code is a dirty hack to 'guess' when a font is
- // ready. It's assumed fonts are loaded in order, so add a known test
- // font after the desired fonts and then test for the loading of that
- // test font.
- function int32(data, offset) {
- return (data.charCodeAt(offset) << 24) |
- (data.charCodeAt(offset + 1) << 16) |
- (data.charCodeAt(offset + 2) << 8) |
- (data.charCodeAt(offset + 3) & 0xff);
- }
- function string32(value) {
- return String.fromCharCode((value >> 24) & 0xff) +
- String.fromCharCode((value >> 16) & 0xff) +
- String.fromCharCode((value >> 8) & 0xff) +
- String.fromCharCode(value & 0xff);
- }
- function spliceString(s, offset, remove, insert) {
- var chunk1 = data.substr(0, offset);
- var chunk2 = data.substr(offset + remove);
- return chunk1 + insert + chunk2;
- }
- var i, ii;
- var canvas = document.createElement('canvas');
- canvas.width = 1;
- canvas.height = 1;
- var ctx = canvas.getContext('2d');
- var called = 0;
- function isFontReady(name, callback) {
- called++;
- // With setTimeout clamping this gives the font ~100ms to load.
- if(called > 30) {
- warn('Load test font never loaded.');
- callback();
- return;
- }
- ctx.font = '30px ' + name;
- ctx.fillText('.', 0, 20);
- var imageData = ctx.getImageData(0, 0, 1, 1);
- if (imageData.data[3] > 0) {
- callback();
- return;
- }
- setTimeout(isFontReady.bind(null, name, callback));
- }
- var loadTestFontId = 'lt' + Date.now() + this.loadTestFontId++;
- // Chromium seems to cache fonts based on a hash of the actual font data,
- // so the font must be modified for each load test else it will appear to
- // be loaded already.
- // TODO: This could maybe be made faster by avoiding the btoa of the full
- // font by splitting it in chunks before hand and padding the font id.
- var data = this.loadTestFont;
- var COMMENT_OFFSET = 976; // has to be on 4 byte boundary (for checksum)
- data = spliceString(data, COMMENT_OFFSET, loadTestFontId.length,
- loadTestFontId);
- // CFF checksum is important for IE, adjusting it
- var CFF_CHECKSUM_OFFSET = 16;
- var XXXX_VALUE = 0x58585858; // the "comment" filled with 'X'
- var checksum = int32(data, CFF_CHECKSUM_OFFSET);
- for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) {
- checksum = (checksum - XXXX_VALUE + int32(loadTestFontId, i)) | 0;
- }
- if (i < loadTestFontId.length) { // align to 4 bytes boundary
- checksum = (checksum - XXXX_VALUE +
- int32(loadTestFontId + 'XXX', i)) | 0;
- }
- data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, string32(checksum));
- var url = 'url(data:font/opentype;base64,' + btoa(data) + ');';
- var rule = '@font-face { font-family:"' + loadTestFontId + '";src:' +
- url + '}';
- FontLoader.insertRule(rule);
- var names = [];
- for (i = 0, ii = fonts.length; i < ii; i++) {
- names.push(fonts[i].loadedName);
- }
- names.push(loadTestFontId);
- var div = document.createElement('div');
- div.setAttribute('style',
- 'visibility: hidden;' +
- 'width: 10px; height: 10px;' +
- 'position: absolute; top: 0px; left: 0px;');
- for (i = 0, ii = names.length; i < ii; ++i) {
- var span = document.createElement('span');
- span.textContent = 'Hi';
- span.style.fontFamily = names[i];
- div.appendChild(span);
- }
- document.body.appendChild(div);
- isFontReady(loadTestFontId, function() {
- document.body.removeChild(div);
- request.complete();
- });
- /** Hack end */
- }
- };
- var FontFace = (function FontFaceClosure() {
- function FontFace(name, file, properties) {
- this.compiledGlyphs = {};
- if (arguments.length === 1) {
- // importing translated data
- var data = arguments[0];
- for (var i in data) {
- this[i] = data[i];
- }
- return;
- }
- }
- FontFace.prototype = {
- bindDOM: function FontFace_bindDOM() {
- if (!this.data)
- return null;
- if (PDFJS.disableFontFace) {
- this.disableFontFace = true;
- return null;
- }
- var data = bytesToString(this.data);
- var fontName = this.loadedName;
- // Add the font-face rule to the document
- var url = ('url(data:' + this.mimetype + ';base64,' +
- window.btoa(data) + ');');
- var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}';
- FontLoader.insertRule(rule);
- if (PDFJS.pdfBug && 'FontInspector' in globalScope &&
- globalScope['FontInspector'].enabled)
- globalScope['FontInspector'].fontAdded(this, url);
- return rule;
- },
- getPathGenerator: function (objs, character) {
- if (!(character in this.compiledGlyphs)) {
- var js = objs.get(this.loadedName + '_path_' + character);
- /*jshint -W054 */
- this.compiledGlyphs[character] = new Function('c', 'size', js);
- }
- return this.compiledGlyphs[character];
- }
- };
- return FontFace;
- })();
- }).call((typeof window === 'undefined') ? this : window);
- if (!PDFJS.workerSrc && typeof document !== 'undefined') {
- // workerSrc is not set -- using last script url to define default location
- PDFJS.workerSrc = (function () {
- 'use strict';
- var scriptTagContainer = document.body ||
- document.getElementsByTagName('head')[0];
- var pdfjsSrc = scriptTagContainer.lastChild.src;
- return pdfjsSrc && pdfjsSrc.replace(/\.js$/i, '.worker.js');
- })();
- }
|