mirror of
https://github.com/invoiceninja/invoiceninja.git
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d36675b15b
- Set up Elixir for asset management - CSS + JS will be handled via Elixir/Gulp in gulpfile.js - Removed outdates public/js files
7421 lines
232 KiB
JavaScript
7421 lines
232 KiB
JavaScript
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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/* Copyright 2012 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// Initializing PDFJS global object (if still undefined)
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if (typeof PDFJS === 'undefined') {
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(typeof window !== 'undefined' ? window : this).PDFJS = {};
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}
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PDFJS.version = '0.8.765';
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PDFJS.build = '88ec2bd';
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(function pdfjsWrapper() {
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// Use strict in our context only - users might not want it
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'use strict';
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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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/* Copyright 2012 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* globals Cmd, ColorSpace, Dict, MozBlobBuilder, Name, PDFJS, Ref, URL */
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'use strict';
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var globalScope = (typeof window === 'undefined') ? this : window;
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var isWorker = (typeof window == 'undefined');
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var ERRORS = 0, WARNINGS = 1, INFOS = 5;
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var verbosity = WARNINGS;
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var FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0];
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var TextRenderingMode = {
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FILL: 0,
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STROKE: 1,
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FILL_STROKE: 2,
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INVISIBLE: 3,
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FILL_ADD_TO_PATH: 4,
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STROKE_ADD_TO_PATH: 5,
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FILL_STROKE_ADD_TO_PATH: 6,
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ADD_TO_PATH: 7,
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FILL_STROKE_MASK: 3,
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ADD_TO_PATH_FLAG: 4
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};
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// The global PDFJS object exposes the API
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// In production, it will be declared outside a global wrapper
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// In development, it will be declared here
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if (!globalScope.PDFJS) {
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globalScope.PDFJS = {};
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}
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globalScope.PDFJS.pdfBug = false;
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// All the possible operations for an operator list.
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var OPS = PDFJS.OPS = {
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// Intentionally start from 1 so it is easy to spot bad operators that will be
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// 0's.
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dependency: 1,
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setLineWidth: 2,
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setLineCap: 3,
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setLineJoin: 4,
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setMiterLimit: 5,
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setDash: 6,
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setRenderingIntent: 7,
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setFlatness: 8,
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setGState: 9,
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save: 10,
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restore: 11,
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transform: 12,
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moveTo: 13,
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lineTo: 14,
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curveTo: 15,
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curveTo2: 16,
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curveTo3: 17,
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closePath: 18,
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rectangle: 19,
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stroke: 20,
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closeStroke: 21,
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fill: 22,
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eoFill: 23,
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fillStroke: 24,
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eoFillStroke: 25,
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closeFillStroke: 26,
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closeEOFillStroke: 27,
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endPath: 28,
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clip: 29,
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eoClip: 30,
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beginText: 31,
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endText: 32,
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setCharSpacing: 33,
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setWordSpacing: 34,
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setHScale: 35,
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setLeading: 36,
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setFont: 37,
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setTextRenderingMode: 38,
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setTextRise: 39,
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moveText: 40,
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setLeadingMoveText: 41,
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setTextMatrix: 42,
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nextLine: 43,
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showText: 44,
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showSpacedText: 45,
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nextLineShowText: 46,
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nextLineSetSpacingShowText: 47,
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setCharWidth: 48,
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setCharWidthAndBounds: 49,
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setStrokeColorSpace: 50,
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setFillColorSpace: 51,
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setStrokeColor: 52,
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setStrokeColorN: 53,
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setFillColor: 54,
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setFillColorN: 55,
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setStrokeGray: 56,
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setFillGray: 57,
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setStrokeRGBColor: 58,
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setFillRGBColor: 59,
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setStrokeCMYKColor: 60,
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setFillCMYKColor: 61,
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shadingFill: 62,
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beginInlineImage: 63,
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beginImageData: 64,
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endInlineImage: 65,
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paintXObject: 66,
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markPoint: 67,
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markPointProps: 68,
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beginMarkedContent: 69,
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beginMarkedContentProps: 70,
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endMarkedContent: 71,
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beginCompat: 72,
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endCompat: 73,
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paintFormXObjectBegin: 74,
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paintFormXObjectEnd: 75,
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beginGroup: 76,
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endGroup: 77,
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beginAnnotations: 78,
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endAnnotations: 79,
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beginAnnotation: 80,
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endAnnotation: 81,
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paintJpegXObject: 82,
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paintImageMaskXObject: 83,
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paintImageMaskXObjectGroup: 84,
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paintImageXObject: 85,
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paintInlineImageXObject: 86,
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paintInlineImageXObjectGroup: 87
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};
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// Use only for debugging purposes. This should not be used in any code that is
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// in mozilla master.
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var log = (function() {
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if ('console' in globalScope && 'log' in globalScope['console']) {
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return globalScope['console']['log'].bind(globalScope['console']);
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} else {
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return function nop() {
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};
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}
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})();
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// A notice for devs that will not trigger the fallback UI. These are good
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// for things that are helpful to devs, such as warning that Workers were
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// disabled, which is important to devs but not end users.
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function info(msg) {
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if (verbosity >= INFOS) {
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log('Info: ' + msg);
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PDFJS.LogManager.notify('info', msg);
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}
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}
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// Non-fatal warnings that should trigger the fallback UI.
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function warn(msg) {
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if (verbosity >= WARNINGS) {
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log('Warning: ' + msg);
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PDFJS.LogManager.notify('warn', msg);
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}
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}
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// Fatal errors that should trigger the fallback UI and halt execution by
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// throwing an exception.
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function error(msg) {
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// If multiple arguments were passed, pass them all to the log function.
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if (arguments.length > 1) {
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var logArguments = ['Error:'];
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logArguments.push.apply(logArguments, arguments);
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log.apply(null, logArguments);
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// Join the arguments into a single string for the lines below.
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msg = [].join.call(arguments, ' ');
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} else {
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log('Error: ' + msg);
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}
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log(backtrace());
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PDFJS.LogManager.notify('error', msg);
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throw new Error(msg);
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}
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// Missing features that should trigger the fallback UI.
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function TODO(what) {
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warn('TODO: ' + what);
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}
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function backtrace() {
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try {
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throw new Error();
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} catch (e) {
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return e.stack ? e.stack.split('\n').slice(2).join('\n') : '';
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}
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}
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function assert(cond, msg) {
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if (!cond)
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error(msg);
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}
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// Combines two URLs. The baseUrl shall be absolute URL. If the url is an
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// absolute URL, it will be returned as is.
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function combineUrl(baseUrl, url) {
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if (!url)
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return baseUrl;
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if (url.indexOf(':') >= 0)
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return url;
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if (url.charAt(0) == '/') {
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// absolute path
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var i = baseUrl.indexOf('://');
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i = baseUrl.indexOf('/', i + 3);
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return baseUrl.substring(0, i) + url;
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} else {
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// relative path
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var pathLength = baseUrl.length, i;
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i = baseUrl.lastIndexOf('#');
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pathLength = i >= 0 ? i : pathLength;
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i = baseUrl.lastIndexOf('?', pathLength);
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pathLength = i >= 0 ? i : pathLength;
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var prefixLength = baseUrl.lastIndexOf('/', pathLength);
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return baseUrl.substring(0, prefixLength + 1) + url;
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}
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}
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// Validates if URL is safe and allowed, e.g. to avoid XSS.
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function isValidUrl(url, allowRelative) {
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if (!url) {
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return false;
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}
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var colon = url.indexOf(':');
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if (colon < 0) {
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return allowRelative;
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}
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var protocol = url.substr(0, colon);
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switch (protocol) {
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case 'http':
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case 'https':
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case 'ftp':
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case 'mailto':
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return true;
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default:
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return false;
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}
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}
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PDFJS.isValidUrl = isValidUrl;
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// In a well-formed PDF, |cond| holds. If it doesn't, subsequent
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// behavior is undefined.
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function assertWellFormed(cond, msg) {
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if (!cond)
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error(msg);
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}
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var LogManager = PDFJS.LogManager = (function LogManagerClosure() {
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var loggers = [];
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return {
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addLogger: function logManager_addLogger(logger) {
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loggers.push(logger);
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},
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notify: function(type, message) {
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for (var i = 0, ii = loggers.length; i < ii; i++) {
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var logger = loggers[i];
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if (logger[type])
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logger[type](message);
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}
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}
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};
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})();
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function shadow(obj, prop, value) {
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Object.defineProperty(obj, prop, { value: value,
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enumerable: true,
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configurable: true,
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writable: false });
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return value;
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}
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var PasswordResponses = PDFJS.PasswordResponses = {
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NEED_PASSWORD: 1,
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INCORRECT_PASSWORD: 2
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};
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var PasswordException = (function PasswordExceptionClosure() {
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function PasswordException(msg, code) {
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this.name = 'PasswordException';
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this.message = msg;
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this.code = code;
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}
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PasswordException.prototype = new Error();
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PasswordException.constructor = PasswordException;
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return PasswordException;
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})();
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var UnknownErrorException = (function UnknownErrorExceptionClosure() {
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function UnknownErrorException(msg, details) {
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this.name = 'UnknownErrorException';
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this.message = msg;
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this.details = details;
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}
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UnknownErrorException.prototype = new Error();
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UnknownErrorException.constructor = UnknownErrorException;
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return UnknownErrorException;
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})();
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var InvalidPDFException = (function InvalidPDFExceptionClosure() {
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function InvalidPDFException(msg) {
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this.name = 'InvalidPDFException';
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this.message = msg;
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}
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InvalidPDFException.prototype = new Error();
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InvalidPDFException.constructor = InvalidPDFException;
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return InvalidPDFException;
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})();
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var MissingPDFException = (function MissingPDFExceptionClosure() {
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function MissingPDFException(msg) {
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this.name = 'MissingPDFException';
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this.message = msg;
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}
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MissingPDFException.prototype = new Error();
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MissingPDFException.constructor = MissingPDFException;
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return MissingPDFException;
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})();
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var NotImplementedException = (function NotImplementedExceptionClosure() {
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function NotImplementedException(msg) {
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this.message = msg;
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}
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NotImplementedException.prototype = new Error();
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NotImplementedException.prototype.name = 'NotImplementedException';
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NotImplementedException.constructor = NotImplementedException;
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return NotImplementedException;
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})();
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var MissingDataException = (function MissingDataExceptionClosure() {
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function MissingDataException(begin, end) {
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this.begin = begin;
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this.end = end;
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this.message = 'Missing data [' + begin + ', ' + end + ')';
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}
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MissingDataException.prototype = new Error();
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MissingDataException.prototype.name = 'MissingDataException';
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MissingDataException.constructor = MissingDataException;
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return MissingDataException;
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})();
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var XRefParseException = (function XRefParseExceptionClosure() {
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function XRefParseException(msg) {
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this.message = msg;
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}
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XRefParseException.prototype = new Error();
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XRefParseException.prototype.name = 'XRefParseException';
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XRefParseException.constructor = XRefParseException;
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return XRefParseException;
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})();
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function bytesToString(bytes) {
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var str = '';
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var length = bytes.length;
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for (var n = 0; n < length; ++n)
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str += String.fromCharCode(bytes[n]);
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return str;
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}
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function stringToBytes(str) {
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var length = str.length;
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var bytes = new Uint8Array(length);
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for (var n = 0; n < length; ++n)
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bytes[n] = str.charCodeAt(n) & 0xFF;
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return bytes;
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}
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var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];
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var Util = PDFJS.Util = (function UtilClosure() {
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function Util() {}
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Util.makeCssRgb = function Util_makeCssRgb(rgb) {
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return 'rgb(' + rgb[0] + ',' + rgb[1] + ',' + rgb[2] + ')';
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};
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Util.makeCssCmyk = function Util_makeCssCmyk(cmyk) {
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var rgb = ColorSpace.singletons.cmyk.getRgb(cmyk, 0);
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return Util.makeCssRgb(rgb);
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};
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// Concatenates two transformation matrices together and returns the result.
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Util.transform = function Util_transform(m1, m2) {
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return [
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m1[0] * m2[0] + m1[2] * m2[1],
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m1[1] * m2[0] + m1[3] * m2[1],
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m1[0] * m2[2] + m1[2] * m2[3],
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m1[1] * m2[2] + m1[3] * m2[3],
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m1[0] * m2[4] + m1[2] * m2[5] + m1[4],
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m1[1] * m2[4] + m1[3] * m2[5] + m1[5]
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];
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};
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// For 2d affine transforms
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Util.applyTransform = function Util_applyTransform(p, m) {
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var xt = p[0] * m[0] + p[1] * m[2] + m[4];
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var yt = p[0] * m[1] + p[1] * m[3] + m[5];
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return [xt, yt];
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};
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Util.applyInverseTransform = function Util_applyInverseTransform(p, m) {
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var d = m[0] * m[3] - m[1] * m[2];
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var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;
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var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;
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return [xt, yt];
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};
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// Applies the transform to the rectangle and finds the minimum axially
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// aligned bounding box.
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Util.getAxialAlignedBoundingBox =
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function Util_getAxialAlignedBoundingBox(r, m) {
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var p1 = Util.applyTransform(r, m);
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var p2 = Util.applyTransform(r.slice(2, 4), m);
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var p3 = Util.applyTransform([r[0], r[3]], m);
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var p4 = Util.applyTransform([r[2], r[1]], m);
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return [
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Math.min(p1[0], p2[0], p3[0], p4[0]),
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Math.min(p1[1], p2[1], p3[1], p4[1]),
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Math.max(p1[0], p2[0], p3[0], p4[0]),
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Math.max(p1[1], p2[1], p3[1], p4[1])
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];
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};
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Util.inverseTransform = function Util_inverseTransform(m) {
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var d = m[0] * m[3] - m[1] * m[2];
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return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d,
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(m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d];
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};
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// Apply a generic 3d matrix M on a 3-vector v:
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// | a b c | | X |
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// | d e f | x | Y |
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// | g h i | | Z |
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// M is assumed to be serialized as [a,b,c,d,e,f,g,h,i],
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// with v as [X,Y,Z]
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Util.apply3dTransform = function Util_apply3dTransform(m, v) {
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return [
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m[0] * v[0] + m[1] * v[1] + m[2] * v[2],
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m[3] * v[0] + m[4] * v[1] + m[5] * v[2],
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m[6] * v[0] + m[7] * v[1] + m[8] * v[2]
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];
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};
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// This calculation uses Singular Value Decomposition.
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// The SVD can be represented with formula A = USV. We are interested in the
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// matrix S here because it represents the scale values.
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Util.singularValueDecompose2dScale =
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function Util_singularValueDecompose2dScale(m) {
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var transpose = [m[0], m[2], m[1], m[3]];
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// 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');
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
var Promise = PDFJS.Promise = (function PromiseClosure() {
|
|
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() {
|
|
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);
|
|
}
|
|
|
|
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() {
|
|
this._status = STATUS_PENDING;
|
|
this._handlers = [];
|
|
}
|
|
/**
|
|
* 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 deferred = new Promise();
|
|
var unresolved = promises.length;
|
|
var results = [];
|
|
if (unresolved === 0) {
|
|
deferred.resolve(results);
|
|
return deferred;
|
|
}
|
|
function reject(reason) {
|
|
if (deferred._status === STATUS_REJECTED) {
|
|
return;
|
|
}
|
|
results = [];
|
|
deferred.reject(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)
|
|
deferred.resolve(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';
|
|
};
|
|
|
|
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);
|
|
},
|
|
|
|
get isResolved() {
|
|
return this._status === STATUS_RESOLVED;
|
|
},
|
|
|
|
get isRejected() {
|
|
return this._status === STATUS_REJECTED;
|
|
},
|
|
|
|
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();
|
|
this._handlers.push({
|
|
thisPromise: this,
|
|
onResolve: onResolve,
|
|
onReject: onReject,
|
|
nextPromise: nextPromise
|
|
});
|
|
HandlerManager.scheduleHandlers(this);
|
|
return nextPromise;
|
|
}
|
|
};
|
|
|
|
return 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() {
|
|
if (typeof URL !== 'undefined' && URL.createObjectURL) {
|
|
return function createObjectURL(data, contentType) {
|
|
var blob = PDFJS.createBlob(data, contentType);
|
|
return URL.createObjectURL(blob);
|
|
};
|
|
}
|
|
|
|
// Blob/createObjectURL is not available, falling back to data schema.
|
|
var digits =
|
|
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
|
|
|
|
return function createObjectURL(data, contentType) {
|
|
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) {
|
|
log.apply(null, data);
|
|
}];
|
|
// If there's no console available, console_error in the
|
|
// action handler will do nothing.
|
|
if ('console' in globalScope) {
|
|
ah['console_error'] = [function ahConsoleError(data) {
|
|
globalScope['console'].error.apply(null, data);
|
|
}];
|
|
} else {
|
|
ah['console_error'] = [function ahConsoleError(data) {
|
|
log.apply(null, data);
|
|
}];
|
|
}
|
|
ah['_warn'] = [function ah_Warn(data) {
|
|
warn(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 promise = new Promise();
|
|
promise.then(function(resolvedData) {
|
|
comObj.postMessage({
|
|
isReply: true,
|
|
callbackId: data.callbackId,
|
|
data: resolvedData
|
|
});
|
|
});
|
|
action[0].call(action[1], data.data, promise);
|
|
} 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.
|
|
*/
|
|
getRgbBuffer: function ColorSpace_getRgbBuffer(src, srcOffset, count,
|
|
dest, destOffset, bits) {
|
|
error('Should not call ColorSpace.getRgbBuffer');
|
|
},
|
|
/**
|
|
* Determines amount of the bytes is required to store the reslut of the
|
|
* conversion that done by the getRgbBuffer method.
|
|
*/
|
|
getOutputLength: function ColorSpace_getOutputLength(inputLength) {
|
|
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;
|
|
},
|
|
/**
|
|
* Creates the output buffer and converts the specified number of the color
|
|
* values to the RGB colors, similar to the getRgbBuffer.
|
|
*/
|
|
createRgbBuffer: function ColorSpace_createRgbBuffer(src, srcOffset,
|
|
count, bits) {
|
|
if (this.isPassthrough(bits)) {
|
|
return src.subarray(srcOffset);
|
|
}
|
|
var dest = new Uint8Array(count * 3);
|
|
var numComponentColors = 1 << bits;
|
|
// 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.
|
|
if (this.numComps === 1 && count > numComponentColors &&
|
|
this.name !== 'DeviceGray' && this.name !== 'DeviceRGB') {
|
|
// 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 = bits <= 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, bits);
|
|
|
|
var destOffset = 0;
|
|
for (var i = 0; i < count; ++i) {
|
|
var key = src[srcOffset++] * 3;
|
|
dest[destOffset++] = colorMap[key];
|
|
dest[destOffset++] = colorMap[key + 1];
|
|
dest[destOffset++] = colorMap[key + 2];
|
|
}
|
|
return dest;
|
|
}
|
|
this.getRgbBuffer(src, srcOffset, count, dest, 0, bits);
|
|
return dest;
|
|
},
|
|
/**
|
|
* 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) {
|
|
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;
|
|
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);
|
|
}
|
|
},
|
|
getOutputLength: function AlternateCS_getOutputLength(inputLength) {
|
|
return this.base.getOutputLength(inputLength *
|
|
this.base.numComps / this.numComps);
|
|
},
|
|
isPassthrough: ColorSpace.prototype.isPassthrough,
|
|
createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
|
|
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) {
|
|
var base = this.base;
|
|
var numComps = base.numComps;
|
|
var outputDelta = base.getOutputLength(numComps);
|
|
var lookup = this.lookup;
|
|
|
|
for (var i = 0; i < count; ++i) {
|
|
var lookupPos = src[srcOffset++] * numComps;
|
|
base.getRgbBuffer(lookup, lookupPos, 1, dest, destOffset, 8);
|
|
destOffset += outputDelta;
|
|
}
|
|
},
|
|
getOutputLength: function IndexedCS_getOutputLength(inputLength) {
|
|
return this.base.getOutputLength(inputLength * this.base.numComps);
|
|
},
|
|
isPassthrough: ColorSpace.prototype.isPassthrough,
|
|
createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
|
|
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) {
|
|
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;
|
|
}
|
|
},
|
|
getOutputLength: function DeviceGrayCS_getOutputLength(inputLength) {
|
|
return inputLength * 3;
|
|
},
|
|
isPassthrough: ColorSpace.prototype.isPassthrough,
|
|
createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
|
|
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) {
|
|
var length = count * 3;
|
|
if (bits == 8) {
|
|
dest.set(src.subarray(srcOffset, srcOffset + length), destOffset);
|
|
return;
|
|
}
|
|
var scale = 255 / ((1 << bits) - 1);
|
|
var j = srcOffset, q = destOffset;
|
|
for (var i = 0; i < length; ++i) {
|
|
dest[q++] = (scale * src[j++]) | 0;
|
|
}
|
|
},
|
|
getOutputLength: function DeviceRgbCS_getOutputLength(inputLength) {
|
|
return inputLength;
|
|
},
|
|
isPassthrough: function DeviceRgbCS_isPassthrough(bits) {
|
|
return bits == 8;
|
|
},
|
|
createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
|
|
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) {
|
|
var scale = 1 / ((1 << bits) - 1);
|
|
for (var i = 0; i < count; i++) {
|
|
convertToRgb(src, srcOffset, scale, dest, destOffset);
|
|
srcOffset += 4;
|
|
destOffset += 3;
|
|
}
|
|
},
|
|
getOutputLength: function DeviceCmykCS_getOutputLength(inputLength) {
|
|
return (inputLength >> 2) * 3;
|
|
},
|
|
isPassthrough: ColorSpace.prototype.isPassthrough,
|
|
createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
|
|
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 = 3;
|
|
this.defaultColor = new Float32Array([0, 0, 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) {
|
|
TODO(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;
|
|
}
|
|
}
|
|
|
|
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) {
|
|
// A represents a gray component of a calibrated gray space.
|
|
// A <---> AG in the spec
|
|
var A = src[srcOffset];
|
|
var AG = Math.pow(A, this.G);
|
|
|
|
// Computes intermediate variables M, L, N as per spec.
|
|
// Except if other than default BlackPoint values are used.
|
|
var M = this.XW * AG;
|
|
var L = this.YW * AG;
|
|
var N = this.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;
|
|
},
|
|
getRgbBuffer: function CalGrayCS_getRgbBuffer(src, srcOffset, count,
|
|
dest, destOffset, bits) {
|
|
// TODO: This part is copied from DeviceGray. Make this utility function.
|
|
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;
|
|
}
|
|
},
|
|
getOutputLength: function CalGrayCS_getOutputLength(inputLength) {
|
|
return inputLength * 3;
|
|
},
|
|
isPassthrough: ColorSpace.prototype.isPassthrough,
|
|
createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
|
|
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) {
|
|
var maxVal = (1 << bits) - 1;
|
|
for (var i = 0; i < count; i++) {
|
|
convertToRgb(this, src, srcOffset, maxVal, dest, destOffset);
|
|
srcOffset += 3;
|
|
destOffset += 3;
|
|
}
|
|
},
|
|
getOutputLength: function LabCS_getOutputLength(inputLength) {
|
|
return inputLength;
|
|
},
|
|
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 PatternType = {
|
|
AXIAL: 2,
|
|
RADIAL: 3
|
|
};
|
|
|
|
var Pattern = (function PatternClosure() {
|
|
// Constructor should define this.getPattern
|
|
function Pattern() {
|
|
error('should not call Pattern constructor');
|
|
}
|
|
|
|
Pattern.prototype = {
|
|
// Input: current Canvas context
|
|
// Output: the appropriate fillStyle or strokeStyle
|
|
getPattern: function Pattern_getPattern(ctx) {
|
|
error('Should not call Pattern.getStyle: ' + ctx);
|
|
}
|
|
};
|
|
|
|
Pattern.shadingFromIR = function Pattern_shadingFromIR(raw) {
|
|
return Shadings[raw[0]].fromIR(raw);
|
|
};
|
|
|
|
Pattern.parseShading = function Pattern_parseShading(shading, matrix, xref,
|
|
res) {
|
|
|
|
var dict = isStream(shading) ? shading.dict : shading;
|
|
var type = dict.get('ShadingType');
|
|
|
|
switch (type) {
|
|
case PatternType.AXIAL:
|
|
case PatternType.RADIAL:
|
|
// Both radial and axial shadings are handled by RadialAxial shading.
|
|
return new Shadings.RadialAxial(dict, matrix, xref, res);
|
|
default:
|
|
TODO('Unsupported shading type: ' + type);
|
|
return new Shadings.Dummy();
|
|
}
|
|
};
|
|
return Pattern;
|
|
})();
|
|
|
|
var Shadings = {};
|
|
|
|
// A small number to offset the first/last color stops so we can insert ones to
|
|
// support extend. Number.MIN_VALUE appears to be too small and breaks the
|
|
// extend. 1e-7 works in FF but chrome seems to use an even smaller sized number
|
|
// internally so we have to go bigger.
|
|
Shadings.SMALL_NUMBER = 1e-2;
|
|
|
|
// Radial and axial shading have very similar implementations
|
|
// If needed, the implementations can be broken into two classes
|
|
Shadings.RadialAxial = (function RadialAxialClosure() {
|
|
function RadialAxial(dict, matrix, xref, res, ctx) {
|
|
this.matrix = matrix;
|
|
this.coordsArr = dict.get('Coords');
|
|
this.shadingType = dict.get('ShadingType');
|
|
this.type = 'Pattern';
|
|
this.ctx = ctx;
|
|
var cs = dict.get('ColorSpace', 'CS');
|
|
cs = ColorSpace.parse(cs, xref, res);
|
|
this.cs = cs;
|
|
|
|
var t0 = 0.0, t1 = 1.0;
|
|
if (dict.has('Domain')) {
|
|
var domainArr = dict.get('Domain');
|
|
t0 = domainArr[0];
|
|
t1 = domainArr[1];
|
|
}
|
|
|
|
var extendStart = false, extendEnd = false;
|
|
if (dict.has('Extend')) {
|
|
var extendArr = dict.get('Extend');
|
|
extendStart = extendArr[0];
|
|
extendEnd = extendArr[1];
|
|
}
|
|
|
|
if (this.shadingType === PatternType.RADIAL &&
|
|
(!extendStart || !extendEnd)) {
|
|
// Radial gradient only currently works if either circle is fully within
|
|
// the other circle.
|
|
var x1 = this.coordsArr[0];
|
|
var y1 = this.coordsArr[1];
|
|
var r1 = this.coordsArr[2];
|
|
var x2 = this.coordsArr[3];
|
|
var y2 = this.coordsArr[4];
|
|
var r2 = this.coordsArr[5];
|
|
var distance = Math.sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
|
|
if (r1 <= r2 + distance &&
|
|
r2 <= r1 + distance) {
|
|
warn('Unsupported radial gradient.');
|
|
}
|
|
}
|
|
|
|
this.extendStart = extendStart;
|
|
this.extendEnd = extendEnd;
|
|
|
|
var fnObj = dict.get('Function');
|
|
var fn;
|
|
if (isArray(fnObj)) {
|
|
var fnArray = [];
|
|
for (var j = 0, jj = fnObj.length; j < jj; j++) {
|
|
var obj = xref.fetchIfRef(fnObj[j]);
|
|
if (!isPDFFunction(obj)) {
|
|
error('Invalid function');
|
|
}
|
|
fnArray.push(PDFFunction.parse(xref, obj));
|
|
}
|
|
fn = function radialAxialColorFunction(arg) {
|
|
var out = [];
|
|
for (var i = 0, ii = fnArray.length; i < ii; i++) {
|
|
out.push(fnArray[i](arg)[0]);
|
|
}
|
|
return out;
|
|
};
|
|
} else {
|
|
if (!isPDFFunction(fnObj)) {
|
|
error('Invalid function');
|
|
}
|
|
fn = PDFFunction.parse(xref, fnObj);
|
|
}
|
|
|
|
// 10 samples seems good enough for now, but probably won't work
|
|
// if there are sharp color changes. Ideally, we would implement
|
|
// the spec faithfully and add lossless optimizations.
|
|
var diff = t1 - t0;
|
|
var step = diff / 10;
|
|
|
|
var colorStops = this.colorStops = [];
|
|
|
|
// Protect against bad domains so we don't end up in an infinte loop below.
|
|
if (t0 >= t1 || step <= 0) {
|
|
// Acrobat doesn't seem to handle these cases so we'll ignore for
|
|
// now.
|
|
info('Bad shading domain.');
|
|
return;
|
|
}
|
|
|
|
for (var i = t0; i <= t1; i += step) {
|
|
var rgbColor = cs.getRgb(fn([i]), 0);
|
|
var cssColor = Util.makeCssRgb(rgbColor);
|
|
colorStops.push([(i - t0) / diff, cssColor]);
|
|
}
|
|
|
|
var background = 'transparent';
|
|
if (dict.has('Background')) {
|
|
var rgbColor = cs.getRgb(dict.get('Background'), 0);
|
|
background = Util.makeCssRgb(rgbColor);
|
|
}
|
|
|
|
if (!extendStart) {
|
|
// Insert a color stop at the front and offset the first real color stop
|
|
// so it doesn't conflict with the one we insert.
|
|
colorStops.unshift([0, background]);
|
|
colorStops[1][0] += Shadings.SMALL_NUMBER;
|
|
}
|
|
if (!extendEnd) {
|
|
// Same idea as above in extendStart but for the end.
|
|
colorStops[colorStops.length - 1][0] -= Shadings.SMALL_NUMBER;
|
|
colorStops.push([1, background]);
|
|
}
|
|
|
|
this.colorStops = colorStops;
|
|
}
|
|
|
|
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 == PatternType.AXIAL)
|
|
grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);
|
|
else if (type == PatternType.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;
|
|
}
|
|
};
|
|
};
|
|
|
|
RadialAxial.prototype = {
|
|
getIR: function RadialAxial_getIR() {
|
|
var coordsArr = this.coordsArr;
|
|
var type = this.shadingType;
|
|
if (type == PatternType.AXIAL) {
|
|
var p0 = [coordsArr[0], coordsArr[1]];
|
|
var p1 = [coordsArr[2], coordsArr[3]];
|
|
var r0 = null;
|
|
var r1 = null;
|
|
} else if (type == PatternType.RADIAL) {
|
|
var p0 = [coordsArr[0], coordsArr[1]];
|
|
var p1 = [coordsArr[3], coordsArr[4]];
|
|
var r0 = coordsArr[2];
|
|
var r1 = coordsArr[5];
|
|
} else {
|
|
error('getPattern type unknown: ' + type);
|
|
}
|
|
|
|
var matrix = this.matrix;
|
|
if (matrix) {
|
|
p0 = Util.applyTransform(p0, matrix);
|
|
p1 = Util.applyTransform(p1, matrix);
|
|
}
|
|
|
|
return ['RadialAxial', type, this.colorStops, p0, p1, r0, r1];
|
|
}
|
|
};
|
|
|
|
return RadialAxial;
|
|
})();
|
|
|
|
Shadings.Dummy = (function DummyClosure() {
|
|
function Dummy() {
|
|
this.type = 'Pattern';
|
|
}
|
|
|
|
Dummy.fromIR = function Dummy_fromIR() {
|
|
return {
|
|
type: 'Pattern',
|
|
getPattern: function Dummy_fromIR_getPattern() {
|
|
return 'hotpink';
|
|
}
|
|
};
|
|
};
|
|
|
|
Dummy.prototype = {
|
|
getIR: function Dummy_getIR() {
|
|
return ['Dummy'];
|
|
}
|
|
};
|
|
return Dummy;
|
|
})();
|
|
|
|
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.getIR = function TilingPattern_getIR(operatorList, dict, args) {
|
|
var matrix = dict.get('Matrix');
|
|
var bbox = dict.get('BBox');
|
|
var xstep = dict.get('XStep');
|
|
var ystep = dict.get('YStep');
|
|
var paintType = dict.get('PaintType');
|
|
var tilingType = dict.get('TilingType');
|
|
|
|
return [
|
|
'TilingPattern', args, operatorList, matrix, bbox, xstep, ystep,
|
|
paintType, tilingType
|
|
];
|
|
};
|
|
|
|
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;
|
|
|
|
TODO('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;
|
|
})();
|
|
|
|
|
|
|
|
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
|
|
TODO('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;
|
|
}
|
|
|
|
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 Promise();
|
|
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 Promise();
|
|
|
|
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 {
|
|
TODO('unimplemented annotation type: ' + subtype);
|
|
}
|
|
};
|
|
|
|
Annotation.appendToOperatorList = function Annotation_appendToOperatorList(
|
|
annotations, opList, pdfManager, partialEvaluator) {
|
|
|
|
function reject(e) {
|
|
annotationsReadyPromise.reject(e);
|
|
}
|
|
|
|
var annotationsReadyPromise = new Promise();
|
|
|
|
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') {
|
|
TODO('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 Promise();
|
|
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 Promise();
|
|
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 = addDefaultProtocolToUrl(action.get('URI'));
|
|
// 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 {
|
|
TODO('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;
|
|
/**
|
|
* 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|TypedAray|object} source Can be an url to where a PDF is
|
|
* located, a typed array (Uint8Array) already populated with data or
|
|
* and parameter object with the following possible fields:
|
|
* - url - The URL of the PDF.
|
|
* - data - A typed array with PDF data.
|
|
* - httpHeaders - Basic authentication headers.
|
|
* - password - For decrypting password-protected PDFs.
|
|
* - 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.
|
|
*
|
|
* @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 {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.Promise();
|
|
workerReadyPromise = new PDFJS.Promise();
|
|
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.
|
|
*/
|
|
var PDFDocumentProxy = (function PDFDocumentProxyClosure() {
|
|
function PDFDocumentProxy(pdfInfo, transport) {
|
|
this.pdfInfo = pdfInfo;
|
|
this.transport = transport;
|
|
}
|
|
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} The page number to get. The first page is 1.
|
|
* @return {Promise} A promise that is resolved with a {PDFPageProxy}
|
|
* object.
|
|
*/
|
|
getPage: function PDFDocumentProxy_getPage(number) {
|
|
return this.transport.getPage(number);
|
|
},
|
|
/**
|
|
* @param {object} Must have '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_getDestinations() {
|
|
var promise = new PDFJS.Promise();
|
|
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.Promise();
|
|
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.Promise();
|
|
var info = this.pdfInfo.info;
|
|
var metadata = this.pdfInfo.metadata;
|
|
promise.resolve({
|
|
info: info,
|
|
metadata: metadata ? new PDFJS.Metadata(metadata) : null
|
|
});
|
|
return promise;
|
|
},
|
|
isEncrypted: function PDFDocumentProxy_isEncrypted() {
|
|
var promise = new PDFJS.Promise();
|
|
promise.resolve(this.pdfInfo.encrypted);
|
|
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.Promise();
|
|
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();
|
|
},
|
|
cleanup: function PDFDocumentProxy_cleanup() {
|
|
this.transport.startCleanup();
|
|
},
|
|
destroy: function PDFDocumentProxy_destroy() {
|
|
this.transport.destroy();
|
|
}
|
|
};
|
|
return PDFDocumentProxy;
|
|
})();
|
|
|
|
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 = {
|
|
/**
|
|
* @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.Promise();
|
|
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 Promise();
|
|
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.reject(error);
|
|
} else {
|
|
renderTask.resolve();
|
|
}
|
|
stats.timeEnd('Rendering');
|
|
stats.timeEnd('Overall');
|
|
}
|
|
|
|
return renderTask;
|
|
},
|
|
/**
|
|
* @return {Promise} That is resolved with the a {string} that is the text
|
|
* content from the page.
|
|
*/
|
|
getTextContent: function PDFPageProxy_getTextContent() {
|
|
var promise = new PDFJS.Promise();
|
|
this.transport.messageHandler.send('GetTextContent', {
|
|
pageIndex: this.pageNumber - 1
|
|
},
|
|
function textContentCallback(textContent) {
|
|
promise.resolve(textContent);
|
|
}
|
|
);
|
|
return promise;
|
|
},
|
|
/**
|
|
* Stub for future feature.
|
|
*/
|
|
getOperationList: function PDFPageProxy_getOperationList() {
|
|
var promise = new PDFJS.Promise();
|
|
var operationList = { // not implemented
|
|
dependencyFontsID: null,
|
|
operatorList: null
|
|
};
|
|
promise.resolve(operationList);
|
|
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.
|
|
*/
|
|
_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.
|
|
*/
|
|
_startRenderPage: function PDFPageProxy_startRenderPage(transparency) {
|
|
this.displayReadyPromise.resolve(transparency);
|
|
},
|
|
/**
|
|
* For internal use only.
|
|
*/
|
|
_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.
|
|
*/
|
|
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 () {
|
|
if (self.worker) {
|
|
self.worker.terminate();
|
|
}
|
|
});
|
|
},
|
|
|
|
loadFakeWorkerFiles: function WorkerTransport_loadFakeWorkerFiles() {
|
|
if (!PDFJS.fakeWorkerFilesLoadedPromise) {
|
|
PDFJS.fakeWorkerFilesLoadedPromise = new Promise();
|
|
// 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, promise) {
|
|
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];
|
|
}
|
|
}
|
|
promise.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
|
|
});
|
|
},
|
|
|
|
getData: function WorkerTransport_getData(promise) {
|
|
this.messageHandler.send('GetData', null, function(data) {
|
|
promise.resolve(data);
|
|
});
|
|
},
|
|
|
|
dataLoaded: function WorkerTransport_dataLoaded() {
|
|
var promise = new PDFJS.Promise();
|
|
this.messageHandler.send('DataLoaded', null, function(args) {
|
|
promise.resolve(args);
|
|
});
|
|
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.Promise('Page ' + pageNumber);
|
|
this.pagePromises[pageIndex] = promise;
|
|
this.messageHandler.send('GetPageRequest', { pageIndex: pageIndex });
|
|
return promise;
|
|
},
|
|
|
|
getPageIndex: function WorkerTransport_getPageIndexByRef(ref) {
|
|
var promise = new PDFJS.Promise();
|
|
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.Promise();
|
|
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.
|
|
*/
|
|
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 Promise(objId),
|
|
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;
|
|
})();
|
|
/*
|
|
* RenderTask is basically a promise but adds a cancel function to terminate it.
|
|
*/
|
|
var RenderTask = (function RenderTaskClosure() {
|
|
function RenderTask(internalRenderTask) {
|
|
this.internalRenderTask = internalRenderTask;
|
|
Promise.call(this);
|
|
}
|
|
|
|
RenderTask.prototype = Object.create(Promise.prototype);
|
|
|
|
/**
|
|
* Cancel the rendering task. If the task is curently rendering it will not be
|
|
* cancelled until graphics pauses with a timeout. The promise that this
|
|
* object extends will resolved when cancelled.
|
|
*/
|
|
RenderTask.prototype.cancel = function RenderTask_cancel() {
|
|
this.internalRenderTask.cancel();
|
|
};
|
|
|
|
return RenderTask;
|
|
})();
|
|
|
|
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]);
|
|
// 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 pos = 3, data = imgData.data, lineSize = width * 4, count = 0;
|
|
if (data[3] !== 0) {
|
|
points[0] = 1;
|
|
++count;
|
|
}
|
|
for (j = 1; j < width; j++) {
|
|
if (data[pos] !== data[pos + 4]) {
|
|
points[j] = data[pos] ? 2 : 1;
|
|
++count;
|
|
}
|
|
pos += 4;
|
|
}
|
|
if (data[pos] !== 0) {
|
|
points[j] = 2;
|
|
++count;
|
|
}
|
|
pos += 4;
|
|
for (i = 1; i < height; i++) {
|
|
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 + 4] ? 4 : 0) +
|
|
(data[pos - lineSize + 4] ? 8 : 0);
|
|
if (POINT_TYPES[sum]) {
|
|
points[j0 + j] = POINT_TYPES[sum];
|
|
++count;
|
|
}
|
|
pos += 4;
|
|
}
|
|
if (data[pos - lineSize] !== data[pos]) {
|
|
points[j0 + j] = data[pos] ? 2 : 4;
|
|
++count;
|
|
}
|
|
pos += 4;
|
|
|
|
if (count > POINT_TO_PROCESS_LIMIT) {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
pos -= lineSize;
|
|
j0 = i * width1;
|
|
if (data[pos] !== 0) {
|
|
points[j0] = 8;
|
|
++count;
|
|
}
|
|
for (j = 1; j < width; j++) {
|
|
if (data[pos] !== data[pos + 4]) {
|
|
points[j0 + j] = data[pos] ? 4 : 8;
|
|
++count;
|
|
}
|
|
pos += 4;
|
|
}
|
|
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.paintFormXObjectDepth = 0;
|
|
|
|
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;
|
|
if (canvasCtx) {
|
|
addContextCurrentTransform(canvasCtx);
|
|
}
|
|
}
|
|
|
|
function putBinaryImageData(ctx, imgData) {
|
|
if (typeof ImageData !== 'undefined' && imgData instanceof ImageData) {
|
|
ctx.putImageData(imgData, 0, 0);
|
|
return;
|
|
}
|
|
|
|
var tmpImgData = ctx.createImageData(imgData.width, imgData.height);
|
|
|
|
var data = imgData.data;
|
|
var tmpImgDataPixels = tmpImgData.data;
|
|
if ('set' in tmpImgDataPixels)
|
|
tmpImgDataPixels.set(data);
|
|
else {
|
|
// Copy over the imageData pixel by pixel.
|
|
for (var i = 0, ii = tmpImgDataPixels.length; i < ii; i++)
|
|
tmpImgDataPixels[i] = data[i];
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
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) {
|
|
setTimeout(continueCallback, 0);
|
|
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;
|
|
}
|
|
}
|
|
},
|
|
save: function CanvasGraphics_save() {
|
|
this.ctx.save();
|
|
var old = this.current;
|
|
this.stateStack.push(old);
|
|
this.current = old.clone();
|
|
},
|
|
restore: function CanvasGraphics_restore() {
|
|
var prev = this.stateStack.pop();
|
|
if (prev) {
|
|
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;
|
|
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
|
|
});
|
|
}
|
|
},
|
|
|
|
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) {
|
|
// 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 = Pattern.shadingFromIR(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 = Pattern.shadingFromIR(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.current.paintFormXObjectDepth++;
|
|
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() {
|
|
var depth = this.current.paintFormXObjectDepth;
|
|
do {
|
|
this.restore();
|
|
// some pdf don't close all restores inside object
|
|
// closing those for them
|
|
} while (this.current.paintFormXObjectDepth >= depth);
|
|
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) {
|
|
TODO('Support knockout groups.');
|
|
}
|
|
|
|
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 scratchCanvas = CachedCanvases.getCanvas(
|
|
'groupAt' + this.groupLevel, 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);
|
|
|
|
// Setup the current ctx so when the group is popped we draw it 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([
|
|
['SMask', 'None'],
|
|
['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;
|
|
}
|
|
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();
|
|
|
|
putBinaryImageData(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();
|
|
|
|
putBinaryImageData(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;
|
|
})();
|
|
|
|
|
|
|
|
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');
|
|
})();
|
|
}
|
|
|
|
|