mirror of
https://github.com/EGroupware/egroupware.git
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8053 lines
256 KiB
JavaScript
8053 lines
256 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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/*jshint globalstrict: false */
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/* globals PDFJS */
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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 = '1.1.114';
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PDFJS.build = '3fd44fd';
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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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Promise */
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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 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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var ImageKind = {
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GRAYSCALE_1BPP: 1,
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RGB_24BPP: 2,
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RGBA_32BPP: 3
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};
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var AnnotationType = {
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WIDGET: 1,
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TEXT: 2,
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LINK: 3
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};
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var StreamType = {
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UNKNOWN: 0,
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FLATE: 1,
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LZW: 2,
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DCT: 3,
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JPX: 4,
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JBIG: 5,
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A85: 6,
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AHX: 7,
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CCF: 8,
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RL: 9
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};
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var FontType = {
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UNKNOWN: 0,
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TYPE1: 1,
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TYPE1C: 2,
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CIDFONTTYPE0: 3,
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CIDFONTTYPE0C: 4,
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TRUETYPE: 5,
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CIDFONTTYPE2: 6,
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TYPE3: 7,
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OPENTYPE: 8,
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TYPE0: 9,
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MMTYPE1: 10
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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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PDFJS.VERBOSITY_LEVELS = {
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errors: 0,
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warnings: 1,
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infos: 5
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};
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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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paintImageXObjectRepeat: 88,
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paintImageMaskXObjectRepeat: 89,
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paintSolidColorImageMask: 90,
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constructPath: 91
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};
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// A notice for devs. These are good for things that are helpful to devs, such
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// as warning that Workers were disabled, which is important to devs but not
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// end users.
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function info(msg) {
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if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.infos) {
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console.log('Info: ' + msg);
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}
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}
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// Non-fatal warnings.
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function warn(msg) {
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if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.warnings) {
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console.log('Warning: ' + 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 (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.errors) {
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console.log('Error: ' + msg);
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console.log(backtrace());
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}
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UnsupportedManager.notify(UNSUPPORTED_FEATURES.unknown);
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throw new Error(msg);
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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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}
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var UNSUPPORTED_FEATURES = PDFJS.UNSUPPORTED_FEATURES = {
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unknown: 'unknown',
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forms: 'forms',
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javaScript: 'javaScript',
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smask: 'smask',
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shadingPattern: 'shadingPattern',
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font: 'font'
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};
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var UnsupportedManager = PDFJS.UnsupportedManager =
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(function UnsupportedManagerClosure() {
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var listeners = [];
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return {
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listen: function (cb) {
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listeners.push(cb);
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},
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notify: function (featureId) {
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warn('Unsupported feature "' + featureId + '"');
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for (var i = 0, ii = listeners.length; i < ii; i++) {
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listeners[i](featureId);
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}
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}
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};
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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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}
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if (/^[a-z][a-z0-9+\-.]*:/i.test(url)) {
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return url;
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}
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var i;
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if (url.charAt(0) === '/') {
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// absolute path
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i = baseUrl.indexOf('://');
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if (url.charAt(1) === '/') {
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++i;
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} else {
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i = baseUrl.indexOf('/', i + 3);
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}
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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;
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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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// RFC 3986 (http://tools.ietf.org/html/rfc3986#section-3.1)
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// scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
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var protocol = /^[a-z][a-z0-9+\-.]*(?=:)/i.exec(url);
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if (!protocol) {
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return allowRelative;
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}
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protocol = protocol[0].toLowerCase();
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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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case 'tel':
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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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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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PDFJS.shadow = shadow;
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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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PDFJS.PasswordException = PasswordException;
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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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PDFJS.UnknownErrorException = UnknownErrorException;
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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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PDFJS.InvalidPDFException = InvalidPDFException;
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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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PDFJS.MissingPDFException = MissingPDFException;
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var UnexpectedResponseException =
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(function UnexpectedResponseExceptionClosure() {
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function UnexpectedResponseException(msg, status) {
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this.name = 'UnexpectedResponseException';
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this.message = msg;
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this.status = status;
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}
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UnexpectedResponseException.prototype = new Error();
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UnexpectedResponseException.constructor = UnexpectedResponseException;
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return UnexpectedResponseException;
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})();
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PDFJS.UnexpectedResponseException = UnexpectedResponseException;
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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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assert(bytes !== null && typeof bytes === 'object' &&
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bytes.length !== undefined, 'Invalid argument for bytesToString');
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var length = bytes.length;
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var MAX_ARGUMENT_COUNT = 8192;
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if (length < MAX_ARGUMENT_COUNT) {
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return String.fromCharCode.apply(null, bytes);
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}
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var strBuf = [];
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for (var i = 0; i < length; i += MAX_ARGUMENT_COUNT) {
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var chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length);
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var chunk = bytes.subarray(i, chunkEnd);
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strBuf.push(String.fromCharCode.apply(null, chunk));
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}
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return strBuf.join('');
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}
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function stringToBytes(str) {
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assert(typeof str === 'string', 'Invalid argument for stringToBytes');
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var length = str.length;
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var bytes = new Uint8Array(length);
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for (var i = 0; i < length; ++i) {
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bytes[i] = str.charCodeAt(i) & 0xFF;
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}
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return bytes;
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}
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function string32(value) {
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return String.fromCharCode((value >> 24) & 0xff, (value >> 16) & 0xff,
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(value >> 8) & 0xff, value & 0xff);
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}
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function log2(x) {
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var n = 1, i = 0;
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while (x > n) {
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n <<= 1;
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i++;
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}
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return i;
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}
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function readInt8(data, start) {
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return (data[start] << 24) >> 24;
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}
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function readUint16(data, offset) {
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return (data[offset] << 8) | data[offset + 1];
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}
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function readUint32(data, offset) {
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return ((data[offset] << 24) | (data[offset + 1] << 16) |
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(data[offset + 2] << 8) | data[offset + 3]) >>> 0;
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}
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|
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// Lazy test the endianness of the platform
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|
// NOTE: This will be 'true' for simulated TypedArrays
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|
function isLittleEndian() {
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|
var buffer8 = new Uint8Array(2);
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buffer8[0] = 1;
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var buffer16 = new Uint16Array(buffer8.buffer);
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return (buffer16[0] === 1);
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}
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Object.defineProperty(PDFJS, 'isLittleEndian', {
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configurable: true,
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get: function PDFJS_isLittleEndian() {
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return shadow(PDFJS, 'isLittleEndian', isLittleEndian());
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}
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});
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|
|
//#if !(FIREFOX || MOZCENTRAL || B2G || CHROME)
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|
//// Lazy test if the userAgant support CanvasTypedArrays
|
|
function hasCanvasTypedArrays() {
|
|
var canvas = document.createElement('canvas');
|
|
canvas.width = canvas.height = 1;
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|
var ctx = canvas.getContext('2d');
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|
var imageData = ctx.createImageData(1, 1);
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return (typeof imageData.data.buffer !== 'undefined');
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}
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Object.defineProperty(PDFJS, 'hasCanvasTypedArrays', {
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configurable: true,
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get: function PDFJS_hasCanvasTypedArrays() {
|
|
return shadow(PDFJS, 'hasCanvasTypedArrays', hasCanvasTypedArrays());
|
|
}
|
|
});
|
|
|
|
var Uint32ArrayView = (function Uint32ArrayViewClosure() {
|
|
|
|
function Uint32ArrayView(buffer, length) {
|
|
this.buffer = buffer;
|
|
this.byteLength = buffer.length;
|
|
this.length = length === undefined ? (this.byteLength >> 2) : length;
|
|
ensureUint32ArrayViewProps(this.length);
|
|
}
|
|
Uint32ArrayView.prototype = Object.create(null);
|
|
|
|
var uint32ArrayViewSetters = 0;
|
|
function createUint32ArrayProp(index) {
|
|
return {
|
|
get: function () {
|
|
var buffer = this.buffer, offset = index << 2;
|
|
return (buffer[offset] | (buffer[offset + 1] << 8) |
|
|
(buffer[offset + 2] << 16) | (buffer[offset + 3] << 24)) >>> 0;
|
|
},
|
|
set: function (value) {
|
|
var buffer = this.buffer, offset = index << 2;
|
|
buffer[offset] = value & 255;
|
|
buffer[offset + 1] = (value >> 8) & 255;
|
|
buffer[offset + 2] = (value >> 16) & 255;
|
|
buffer[offset + 3] = (value >>> 24) & 255;
|
|
}
|
|
};
|
|
}
|
|
|
|
function ensureUint32ArrayViewProps(length) {
|
|
while (uint32ArrayViewSetters < length) {
|
|
Object.defineProperty(Uint32ArrayView.prototype,
|
|
uint32ArrayViewSetters,
|
|
createUint32ArrayProp(uint32ArrayViewSetters));
|
|
uint32ArrayViewSetters++;
|
|
}
|
|
}
|
|
|
|
return Uint32ArrayView;
|
|
})();
|
|
//#else
|
|
//PDFJS.hasCanvasTypedArrays = true;
|
|
//#endif
|
|
|
|
var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];
|
|
|
|
var Util = PDFJS.Util = (function UtilClosure() {
|
|
function Util() {}
|
|
|
|
var rgbBuf = ['rgb(', 0, ',', 0, ',', 0, ')'];
|
|
|
|
// makeCssRgb() can be called thousands of times. Using |rgbBuf| avoids
|
|
// creating many intermediate strings.
|
|
Util.makeCssRgb = function Util_makeCssRgb(r, g, b) {
|
|
rgbBuf[1] = r;
|
|
rgbBuf[3] = g;
|
|
rgbBuf[5] = b;
|
|
return rgbBuf.join('');
|
|
};
|
|
|
|
// Concatenates two transformation matrices together and returns the result.
|
|
Util.transform = function Util_transform(m1, m2) {
|
|
return [
|
|
m1[0] * m2[0] + m1[2] * m2[1],
|
|
m1[1] * m2[0] + m1[3] * m2[1],
|
|
m1[0] * m2[2] + m1[2] * m2[3],
|
|
m1[1] * m2[2] + m1[3] * m2[3],
|
|
m1[0] * m2[4] + m1[2] * m2[5] + m1[4],
|
|
m1[1] * m2[4] + m1[3] * m2[5] + m1[5]
|
|
];
|
|
};
|
|
|
|
// For 2d affine transforms
|
|
Util.applyTransform = function Util_applyTransform(p, m) {
|
|
var xt = p[0] * m[0] + p[1] * m[2] + m[4];
|
|
var yt = p[0] * m[1] + p[1] * m[3] + m[5];
|
|
return [xt, yt];
|
|
};
|
|
|
|
Util.applyInverseTransform = function Util_applyInverseTransform(p, m) {
|
|
var d = m[0] * m[3] - m[1] * m[2];
|
|
var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;
|
|
var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;
|
|
return [xt, yt];
|
|
};
|
|
|
|
// Applies the transform to the rectangle and finds the minimum axially
|
|
// aligned bounding box.
|
|
Util.getAxialAlignedBoundingBox =
|
|
function Util_getAxialAlignedBoundingBox(r, m) {
|
|
|
|
var p1 = Util.applyTransform(r, m);
|
|
var p2 = Util.applyTransform(r.slice(2, 4), m);
|
|
var p3 = Util.applyTransform([r[0], r[3]], m);
|
|
var p4 = Util.applyTransform([r[2], r[1]], m);
|
|
return [
|
|
Math.min(p1[0], p2[0], p3[0], p4[0]),
|
|
Math.min(p1[1], p2[1], p3[1], p4[1]),
|
|
Math.max(p1[0], p2[0], p3[0], p4[0]),
|
|
Math.max(p1[1], p2[1], p3[1], p4[1])
|
|
];
|
|
};
|
|
|
|
Util.inverseTransform = function Util_inverseTransform(m) {
|
|
var d = m[0] * m[3] - m[1] * m[2];
|
|
return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d,
|
|
(m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d];
|
|
};
|
|
|
|
// Apply a generic 3d matrix M on a 3-vector v:
|
|
// | a b c | | X |
|
|
// | d e f | x | Y |
|
|
// | g h i | | Z |
|
|
// M is assumed to be serialized as [a,b,c,d,e,f,g,h,i],
|
|
// with v as [X,Y,Z]
|
|
Util.apply3dTransform = function Util_apply3dTransform(m, v) {
|
|
return [
|
|
m[0] * v[0] + m[1] * v[1] + m[2] * v[2],
|
|
m[3] * v[0] + m[4] * v[1] + m[5] * v[2],
|
|
m[6] * v[0] + m[7] * v[1] + m[8] * v[2]
|
|
];
|
|
};
|
|
|
|
// This calculation uses Singular Value Decomposition.
|
|
// The SVD can be represented with formula A = USV. We are interested in the
|
|
// matrix S here because it represents the scale values.
|
|
Util.singularValueDecompose2dScale =
|
|
function Util_singularValueDecompose2dScale(m) {
|
|
|
|
var transpose = [m[0], m[2], m[1], m[3]];
|
|
|
|
// Multiply matrix m with its transpose.
|
|
var a = m[0] * transpose[0] + m[1] * transpose[2];
|
|
var b = m[0] * transpose[1] + m[1] * transpose[3];
|
|
var c = m[2] * transpose[0] + m[3] * transpose[2];
|
|
var d = m[2] * transpose[1] + m[3] * transpose[3];
|
|
|
|
// Solve the second degree polynomial to get roots.
|
|
var first = (a + d) / 2;
|
|
var second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2;
|
|
var sx = first + second || 1;
|
|
var sy = first - second || 1;
|
|
|
|
// Scale values are the square roots of the eigenvalues.
|
|
return [Math.sqrt(sx), Math.sqrt(sy)];
|
|
};
|
|
|
|
// Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2)
|
|
// For coordinate systems whose origin lies in the bottom-left, this
|
|
// means normalization to (BL,TR) ordering. For systems with origin in the
|
|
// top-left, this means (TL,BR) ordering.
|
|
Util.normalizeRect = function Util_normalizeRect(rect) {
|
|
var r = rect.slice(0); // clone rect
|
|
if (rect[0] > rect[2]) {
|
|
r[0] = rect[2];
|
|
r[2] = rect[0];
|
|
}
|
|
if (rect[1] > rect[3]) {
|
|
r[1] = rect[3];
|
|
r[3] = rect[1];
|
|
}
|
|
return r;
|
|
};
|
|
|
|
// Returns a rectangle [x1, y1, x2, y2] corresponding to the
|
|
// intersection of rect1 and rect2. If no intersection, returns 'false'
|
|
// The rectangle coordinates of rect1, rect2 should be [x1, y1, x2, y2]
|
|
Util.intersect = function Util_intersect(rect1, rect2) {
|
|
function compare(a, b) {
|
|
return a - b;
|
|
}
|
|
|
|
// Order points along the axes
|
|
var orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare),
|
|
orderedY = [rect1[1], rect1[3], rect2[1], rect2[3]].sort(compare),
|
|
result = [];
|
|
|
|
rect1 = Util.normalizeRect(rect1);
|
|
rect2 = Util.normalizeRect(rect2);
|
|
|
|
// X: first and second points belong to different rectangles?
|
|
if ((orderedX[0] === rect1[0] && orderedX[1] === rect2[0]) ||
|
|
(orderedX[0] === rect2[0] && orderedX[1] === rect1[0])) {
|
|
// Intersection must be between second and third points
|
|
result[0] = orderedX[1];
|
|
result[2] = orderedX[2];
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
// Y: first and second points belong to different rectangles?
|
|
if ((orderedY[0] === rect1[1] && orderedY[1] === rect2[1]) ||
|
|
(orderedY[0] === rect2[1] && orderedY[1] === rect1[1])) {
|
|
// Intersection must be between second and third points
|
|
result[1] = orderedY[1];
|
|
result[3] = orderedY[2];
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
return result;
|
|
};
|
|
|
|
Util.sign = function Util_sign(num) {
|
|
return num < 0 ? -1 : 1;
|
|
};
|
|
|
|
Util.appendToArray = function Util_appendToArray(arr1, arr2) {
|
|
Array.prototype.push.apply(arr1, arr2);
|
|
};
|
|
|
|
Util.prependToArray = function Util_prependToArray(arr1, arr2) {
|
|
Array.prototype.unshift.apply(arr1, arr2);
|
|
};
|
|
|
|
Util.extendObj = function extendObj(obj1, obj2) {
|
|
for (var key in obj2) {
|
|
obj1[key] = obj2[key];
|
|
}
|
|
};
|
|
|
|
Util.getInheritableProperty = function Util_getInheritableProperty(dict,
|
|
name) {
|
|
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;
|
|
})();
|
|
|
|
/**
|
|
* PDF page viewport created based on scale, rotation and offset.
|
|
* @class
|
|
* @alias PDFJS.PageViewport
|
|
*/
|
|
var PageViewport = PDFJS.PageViewport = (function PageViewportClosure() {
|
|
/**
|
|
* @constructor
|
|
* @private
|
|
* @param viewBox {Array} xMin, yMin, xMax and yMax coordinates.
|
|
* @param scale {number} scale of the viewport.
|
|
* @param rotation {number} rotations of the viewport in degrees.
|
|
* @param offsetX {number} offset X
|
|
* @param offsetY {number} offset Y
|
|
* @param dontFlip {boolean} if true, axis Y will not be flipped.
|
|
*/
|
|
function PageViewport(viewBox, scale, rotation, offsetX, offsetY, dontFlip) {
|
|
this.viewBox = viewBox;
|
|
this.scale = scale;
|
|
this.rotation = rotation;
|
|
this.offsetX = offsetX;
|
|
this.offsetY = offsetY;
|
|
|
|
// creating transform to convert pdf coordinate system to the normal
|
|
// canvas like coordinates taking in account scale and rotation
|
|
var centerX = (viewBox[2] + viewBox[0]) / 2;
|
|
var centerY = (viewBox[3] + viewBox[1]) / 2;
|
|
var rotateA, rotateB, rotateC, rotateD;
|
|
rotation = rotation % 360;
|
|
rotation = rotation < 0 ? rotation + 360 : rotation;
|
|
switch (rotation) {
|
|
case 180:
|
|
rotateA = -1; rotateB = 0; rotateC = 0; rotateD = 1;
|
|
break;
|
|
case 90:
|
|
rotateA = 0; rotateB = 1; rotateC = 1; rotateD = 0;
|
|
break;
|
|
case 270:
|
|
rotateA = 0; rotateB = -1; rotateC = -1; rotateD = 0;
|
|
break;
|
|
//case 0:
|
|
default:
|
|
rotateA = 1; rotateB = 0; rotateC = 0; rotateD = -1;
|
|
break;
|
|
}
|
|
|
|
if (dontFlip) {
|
|
rotateC = -rotateC; rotateD = -rotateD;
|
|
}
|
|
|
|
var offsetCanvasX, offsetCanvasY;
|
|
var width, height;
|
|
if (rotateA === 0) {
|
|
offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;
|
|
offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;
|
|
width = Math.abs(viewBox[3] - viewBox[1]) * scale;
|
|
height = Math.abs(viewBox[2] - viewBox[0]) * scale;
|
|
} else {
|
|
offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX;
|
|
offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY;
|
|
width = Math.abs(viewBox[2] - viewBox[0]) * scale;
|
|
height = Math.abs(viewBox[3] - viewBox[1]) * scale;
|
|
}
|
|
// creating transform for the following operations:
|
|
// translate(-centerX, -centerY), rotate and flip vertically,
|
|
// scale, and translate(offsetCanvasX, offsetCanvasY)
|
|
this.transform = [
|
|
rotateA * scale,
|
|
rotateB * scale,
|
|
rotateC * scale,
|
|
rotateD * scale,
|
|
offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY,
|
|
offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY
|
|
];
|
|
|
|
this.width = width;
|
|
this.height = height;
|
|
this.fontScale = scale;
|
|
}
|
|
PageViewport.prototype = /** @lends PDFJS.PageViewport.prototype */ {
|
|
/**
|
|
* Clones viewport with additional properties.
|
|
* @param args {Object} (optional) If specified, may contain the 'scale' or
|
|
* 'rotation' properties to override the corresponding properties in
|
|
* the cloned viewport.
|
|
* @returns {PDFJS.PageViewport} Cloned viewport.
|
|
*/
|
|
clone: function PageViewPort_clone(args) {
|
|
args = args || {};
|
|
var scale = 'scale' in args ? args.scale : this.scale;
|
|
var rotation = 'rotation' in args ? args.rotation : this.rotation;
|
|
return new PageViewport(this.viewBox.slice(), scale, rotation,
|
|
this.offsetX, this.offsetY, args.dontFlip);
|
|
},
|
|
/**
|
|
* Converts PDF point to the viewport coordinates. For examples, useful for
|
|
* converting PDF location into canvas pixel coordinates.
|
|
* @param x {number} X coordinate.
|
|
* @param y {number} Y coordinate.
|
|
* @returns {Object} Object that contains 'x' and 'y' properties of the
|
|
* point in the viewport coordinate space.
|
|
* @see {@link convertToPdfPoint}
|
|
* @see {@link convertToViewportRectangle}
|
|
*/
|
|
convertToViewportPoint: function PageViewport_convertToViewportPoint(x, y) {
|
|
return Util.applyTransform([x, y], this.transform);
|
|
},
|
|
/**
|
|
* Converts PDF rectangle to the viewport coordinates.
|
|
* @param rect {Array} xMin, yMin, xMax and yMax coordinates.
|
|
* @returns {Array} Contains corresponding coordinates of the rectangle
|
|
* in the viewport coordinate space.
|
|
* @see {@link convertToViewportPoint}
|
|
*/
|
|
convertToViewportRectangle:
|
|
function PageViewport_convertToViewportRectangle(rect) {
|
|
var tl = Util.applyTransform([rect[0], rect[1]], this.transform);
|
|
var br = Util.applyTransform([rect[2], rect[3]], this.transform);
|
|
return [tl[0], tl[1], br[0], br[1]];
|
|
},
|
|
/**
|
|
* Converts viewport coordinates to the PDF location. For examples, useful
|
|
* for converting canvas pixel location into PDF one.
|
|
* @param x {number} X coordinate.
|
|
* @param y {number} Y coordinate.
|
|
* @returns {Object} Object that contains 'x' and 'y' properties of the
|
|
* point in the PDF coordinate space.
|
|
* @see {@link convertToViewportPoint}
|
|
*/
|
|
convertToPdfPoint: function PageViewport_convertToPdfPoint(x, y) {
|
|
return Util.applyInverseTransform([x, y], this.transform);
|
|
}
|
|
};
|
|
return PageViewport;
|
|
})();
|
|
|
|
var PDFStringTranslateTable = [
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014,
|
|
0x2013, 0x192, 0x2044, 0x2039, 0x203A, 0x2212, 0x2030, 0x201E, 0x201C,
|
|
0x201D, 0x2018, 0x2019, 0x201A, 0x2122, 0xFB01, 0xFB02, 0x141, 0x152, 0x160,
|
|
0x178, 0x17D, 0x131, 0x142, 0x153, 0x161, 0x17E, 0, 0x20AC
|
|
];
|
|
|
|
function stringToPDFString(str) {
|
|
var i, n = str.length, strBuf = [];
|
|
if (str[0] === '\xFE' && str[1] === '\xFF') {
|
|
// UTF16BE BOM
|
|
for (i = 2; i < n; i += 2) {
|
|
strBuf.push(String.fromCharCode(
|
|
(str.charCodeAt(i) << 8) | str.charCodeAt(i + 1)));
|
|
}
|
|
} else {
|
|
for (i = 0; i < n; ++i) {
|
|
var code = PDFStringTranslateTable[str.charCodeAt(i)];
|
|
strBuf.push(code ? String.fromCharCode(code) : str.charAt(i));
|
|
}
|
|
}
|
|
return strBuf.join('');
|
|
}
|
|
|
|
function stringToUTF8String(str) {
|
|
return decodeURIComponent(escape(str));
|
|
}
|
|
|
|
function 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 isName(v) {
|
|
return v instanceof Name;
|
|
}
|
|
|
|
function isCmd(v, cmd) {
|
|
return v instanceof Cmd && (cmd === undefined || 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.getBytes !== undefined;
|
|
}
|
|
|
|
function isArrayBuffer(v) {
|
|
return typeof v === 'object' && v !== null && v.byteLength !== undefined;
|
|
}
|
|
|
|
function isRef(v) {
|
|
return v instanceof Ref;
|
|
}
|
|
|
|
/**
|
|
* Promise Capability object.
|
|
*
|
|
* @typedef {Object} PromiseCapability
|
|
* @property {Promise} promise - A promise object.
|
|
* @property {function} resolve - Fullfills the promise.
|
|
* @property {function} reject - Rejects the promise.
|
|
*/
|
|
|
|
/**
|
|
* Creates a promise capability object.
|
|
* @alias PDFJS.createPromiseCapability
|
|
*
|
|
* @return {PromiseCapability} A capability object contains:
|
|
* - a Promise, resolve and reject methods.
|
|
*/
|
|
function createPromiseCapability() {
|
|
var capability = {};
|
|
capability.promise = new Promise(function (resolve, reject) {
|
|
capability.resolve = resolve;
|
|
capability.reject = reject;
|
|
});
|
|
return capability;
|
|
}
|
|
|
|
PDFJS.createPromiseCapability = createPromiseCapability;
|
|
|
|
/**
|
|
* Polyfill for Promises:
|
|
* The following promise implementation tries to generally implement the
|
|
* Promise/A+ spec. Some notable differences from other promise libaries are:
|
|
* - There currently isn't a seperate deferred and promise object.
|
|
* - Unhandled rejections eventually show an error if they aren't handled.
|
|
*
|
|
* Based off of the work in:
|
|
* https://bugzilla.mozilla.org/show_bug.cgi?id=810490
|
|
*/
|
|
(function PromiseClosure() {
|
|
if (globalScope.Promise) {
|
|
// Promises existing in the DOM/Worker, checking presence of all/resolve
|
|
if (typeof globalScope.Promise.all !== 'function') {
|
|
globalScope.Promise.all = function (iterable) {
|
|
var count = 0, results = [], resolve, reject;
|
|
var promise = new globalScope.Promise(function (resolve_, reject_) {
|
|
resolve = resolve_;
|
|
reject = reject_;
|
|
});
|
|
iterable.forEach(function (p, i) {
|
|
count++;
|
|
p.then(function (result) {
|
|
results[i] = result;
|
|
count--;
|
|
if (count === 0) {
|
|
resolve(results);
|
|
}
|
|
}, reject);
|
|
});
|
|
if (count === 0) {
|
|
resolve(results);
|
|
}
|
|
return promise;
|
|
};
|
|
}
|
|
if (typeof globalScope.Promise.resolve !== 'function') {
|
|
globalScope.Promise.resolve = function (value) {
|
|
return new globalScope.Promise(function (resolve) { resolve(value); });
|
|
};
|
|
}
|
|
if (typeof globalScope.Promise.reject !== 'function') {
|
|
globalScope.Promise.reject = function (reason) {
|
|
return new globalScope.Promise(function (resolve, reject) {
|
|
reject(reason);
|
|
});
|
|
};
|
|
}
|
|
if (typeof globalScope.Promise.prototype.catch !== 'function') {
|
|
globalScope.Promise.prototype.catch = function (onReject) {
|
|
return globalScope.Promise.prototype.then(undefined, onReject);
|
|
};
|
|
}
|
|
return;
|
|
}
|
|
//#if !MOZCENTRAL
|
|
var STATUS_PENDING = 0;
|
|
var STATUS_RESOLVED = 1;
|
|
var STATUS_REJECTED = 2;
|
|
|
|
// In an attempt to avoid silent exceptions, unhandled rejections are
|
|
// tracked and if they aren't handled in a certain amount of time an
|
|
// error is logged.
|
|
var REJECTION_TIMEOUT = 500;
|
|
|
|
var HandlerManager = {
|
|
handlers: [],
|
|
running: false,
|
|
unhandledRejections: [],
|
|
pendingRejectionCheck: false,
|
|
|
|
scheduleHandlers: function scheduleHandlers(promise) {
|
|
if (promise._status === STATUS_PENDING) {
|
|
return;
|
|
}
|
|
|
|
this.handlers = this.handlers.concat(promise._handlers);
|
|
promise._handlers = [];
|
|
|
|
if (this.running) {
|
|
return;
|
|
}
|
|
this.running = true;
|
|
|
|
setTimeout(this.runHandlers.bind(this), 0);
|
|
},
|
|
|
|
runHandlers: function runHandlers() {
|
|
var RUN_TIMEOUT = 1; // ms
|
|
var timeoutAt = Date.now() + RUN_TIMEOUT;
|
|
while (this.handlers.length > 0) {
|
|
var handler = this.handlers.shift();
|
|
|
|
var nextStatus = handler.thisPromise._status;
|
|
var nextValue = handler.thisPromise._value;
|
|
|
|
try {
|
|
if (nextStatus === STATUS_RESOLVED) {
|
|
if (typeof handler.onResolve === 'function') {
|
|
nextValue = handler.onResolve(nextValue);
|
|
}
|
|
} else if (typeof handler.onReject === 'function') {
|
|
nextValue = handler.onReject(nextValue);
|
|
nextStatus = STATUS_RESOLVED;
|
|
|
|
if (handler.thisPromise._unhandledRejection) {
|
|
this.removeUnhandeledRejection(handler.thisPromise);
|
|
}
|
|
}
|
|
} catch (ex) {
|
|
nextStatus = STATUS_REJECTED;
|
|
nextValue = ex;
|
|
}
|
|
|
|
handler.nextPromise._updateStatus(nextStatus, nextValue);
|
|
if (Date.now() >= timeoutAt) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (this.handlers.length > 0) {
|
|
setTimeout(this.runHandlers.bind(this), 0);
|
|
return;
|
|
}
|
|
|
|
this.running = false;
|
|
},
|
|
|
|
addUnhandledRejection: function addUnhandledRejection(promise) {
|
|
this.unhandledRejections.push({
|
|
promise: promise,
|
|
time: Date.now()
|
|
});
|
|
this.scheduleRejectionCheck();
|
|
},
|
|
|
|
removeUnhandeledRejection: function removeUnhandeledRejection(promise) {
|
|
promise._unhandledRejection = false;
|
|
for (var i = 0; i < this.unhandledRejections.length; i++) {
|
|
if (this.unhandledRejections[i].promise === promise) {
|
|
this.unhandledRejections.splice(i);
|
|
i--;
|
|
}
|
|
}
|
|
},
|
|
|
|
scheduleRejectionCheck: function scheduleRejectionCheck() {
|
|
if (this.pendingRejectionCheck) {
|
|
return;
|
|
}
|
|
this.pendingRejectionCheck = true;
|
|
setTimeout(function rejectionCheck() {
|
|
this.pendingRejectionCheck = false;
|
|
var now = Date.now();
|
|
for (var i = 0; i < this.unhandledRejections.length; i++) {
|
|
if (now - this.unhandledRejections[i].time > REJECTION_TIMEOUT) {
|
|
var unhandled = this.unhandledRejections[i].promise._value;
|
|
var msg = 'Unhandled rejection: ' + unhandled;
|
|
if (unhandled.stack) {
|
|
msg += '\n' + unhandled.stack;
|
|
}
|
|
warn(msg);
|
|
this.unhandledRejections.splice(i);
|
|
i--;
|
|
}
|
|
}
|
|
if (this.unhandledRejections.length) {
|
|
this.scheduleRejectionCheck();
|
|
}
|
|
}.bind(this), REJECTION_TIMEOUT);
|
|
}
|
|
};
|
|
|
|
function Promise(resolver) {
|
|
this._status = STATUS_PENDING;
|
|
this._handlers = [];
|
|
try {
|
|
resolver.call(this, this._resolve.bind(this), this._reject.bind(this));
|
|
} catch (e) {
|
|
this._reject(e);
|
|
}
|
|
}
|
|
/**
|
|
* Builds a promise that is resolved when all the passed in promises are
|
|
* resolved.
|
|
* @param {array} array of data and/or promises to wait for.
|
|
* @return {Promise} New dependant promise.
|
|
*/
|
|
Promise.all = function Promise_all(promises) {
|
|
var resolveAll, rejectAll;
|
|
var deferred = new Promise(function (resolve, reject) {
|
|
resolveAll = resolve;
|
|
rejectAll = reject;
|
|
});
|
|
var unresolved = promises.length;
|
|
var results = [];
|
|
if (unresolved === 0) {
|
|
resolveAll(results);
|
|
return deferred;
|
|
}
|
|
function reject(reason) {
|
|
if (deferred._status === STATUS_REJECTED) {
|
|
return;
|
|
}
|
|
results = [];
|
|
rejectAll(reason);
|
|
}
|
|
for (var i = 0, ii = promises.length; i < ii; ++i) {
|
|
var promise = promises[i];
|
|
var resolve = (function(i) {
|
|
return function(value) {
|
|
if (deferred._status === STATUS_REJECTED) {
|
|
return;
|
|
}
|
|
results[i] = value;
|
|
unresolved--;
|
|
if (unresolved === 0) {
|
|
resolveAll(results);
|
|
}
|
|
};
|
|
})(i);
|
|
if (Promise.isPromise(promise)) {
|
|
promise.then(resolve, reject);
|
|
} else {
|
|
resolve(promise);
|
|
}
|
|
}
|
|
return deferred;
|
|
};
|
|
|
|
/**
|
|
* Checks if the value is likely a promise (has a 'then' function).
|
|
* @return {boolean} true if value is thenable
|
|
*/
|
|
Promise.isPromise = function Promise_isPromise(value) {
|
|
return value && typeof value.then === 'function';
|
|
};
|
|
|
|
/**
|
|
* Creates resolved promise
|
|
* @param value resolve value
|
|
* @returns {Promise}
|
|
*/
|
|
Promise.resolve = function Promise_resolve(value) {
|
|
return new Promise(function (resolve) { resolve(value); });
|
|
};
|
|
|
|
/**
|
|
* Creates rejected promise
|
|
* @param reason rejection value
|
|
* @returns {Promise}
|
|
*/
|
|
Promise.reject = function Promise_reject(reason) {
|
|
return new Promise(function (resolve, reject) { reject(reason); });
|
|
};
|
|
|
|
Promise.prototype = {
|
|
_status: null,
|
|
_value: null,
|
|
_handlers: null,
|
|
_unhandledRejection: null,
|
|
|
|
_updateStatus: function Promise__updateStatus(status, value) {
|
|
if (this._status === STATUS_RESOLVED ||
|
|
this._status === STATUS_REJECTED) {
|
|
return;
|
|
}
|
|
|
|
if (status === STATUS_RESOLVED &&
|
|
Promise.isPromise(value)) {
|
|
value.then(this._updateStatus.bind(this, STATUS_RESOLVED),
|
|
this._updateStatus.bind(this, STATUS_REJECTED));
|
|
return;
|
|
}
|
|
|
|
this._status = status;
|
|
this._value = value;
|
|
|
|
if (status === STATUS_REJECTED && this._handlers.length === 0) {
|
|
this._unhandledRejection = true;
|
|
HandlerManager.addUnhandledRejection(this);
|
|
}
|
|
|
|
HandlerManager.scheduleHandlers(this);
|
|
},
|
|
|
|
_resolve: function Promise_resolve(value) {
|
|
this._updateStatus(STATUS_RESOLVED, value);
|
|
},
|
|
|
|
_reject: function Promise_reject(reason) {
|
|
this._updateStatus(STATUS_REJECTED, reason);
|
|
},
|
|
|
|
then: function Promise_then(onResolve, onReject) {
|
|
var nextPromise = new Promise(function (resolve, reject) {
|
|
this.resolve = resolve;
|
|
this.reject = reject;
|
|
});
|
|
this._handlers.push({
|
|
thisPromise: this,
|
|
onResolve: onResolve,
|
|
onReject: onReject,
|
|
nextPromise: nextPromise
|
|
});
|
|
HandlerManager.scheduleHandlers(this);
|
|
return nextPromise;
|
|
},
|
|
|
|
catch: function Promise_catch(onReject) {
|
|
return this.then(undefined, onReject);
|
|
}
|
|
};
|
|
|
|
globalScope.Promise = Promise;
|
|
//#else
|
|
//throw new Error('DOM Promise is not present');
|
|
//#endif
|
|
})();
|
|
|
|
var StatTimer = (function StatTimerClosure() {
|
|
function rpad(str, pad, length) {
|
|
while (str.length < length) {
|
|
str += pad;
|
|
}
|
|
return str;
|
|
}
|
|
function StatTimer() {
|
|
this.started = {};
|
|
this.times = [];
|
|
this.enabled = true;
|
|
}
|
|
StatTimer.prototype = {
|
|
time: function StatTimer_time(name) {
|
|
if (!this.enabled) {
|
|
return;
|
|
}
|
|
if (name in this.started) {
|
|
warn('Timer is already running for ' + name);
|
|
}
|
|
this.started[name] = Date.now();
|
|
},
|
|
timeEnd: function StatTimer_timeEnd(name) {
|
|
if (!this.enabled) {
|
|
return;
|
|
}
|
|
if (!(name in this.started)) {
|
|
warn('Timer has not been started for ' + name);
|
|
}
|
|
this.times.push({
|
|
'name': name,
|
|
'start': this.started[name],
|
|
'end': Date.now()
|
|
});
|
|
// Remove timer from started so it can be called again.
|
|
delete this.started[name];
|
|
},
|
|
toString: function StatTimer_toString() {
|
|
var i, ii;
|
|
var times = this.times;
|
|
var out = '';
|
|
// Find the longest name for padding purposes.
|
|
var longest = 0;
|
|
for (i = 0, ii = times.length; i < ii; ++i) {
|
|
var name = times[i]['name'];
|
|
if (name.length > longest) {
|
|
longest = name.length;
|
|
}
|
|
}
|
|
for (i = 0, ii = times.length; i < ii; ++i) {
|
|
var span = times[i];
|
|
var duration = span.end - span.start;
|
|
out += rpad(span['name'], ' ', longest) + ' ' + duration + 'ms\n';
|
|
}
|
|
return out;
|
|
}
|
|
};
|
|
return StatTimer;
|
|
})();
|
|
|
|
PDFJS.createBlob = function createBlob(data, contentType) {
|
|
if (typeof Blob !== 'undefined') {
|
|
return new Blob([data], { type: contentType });
|
|
}
|
|
// Blob builder is deprecated in FF14 and removed in FF18.
|
|
var bb = new MozBlobBuilder();
|
|
bb.append(data);
|
|
return bb.getBlob(contentType);
|
|
};
|
|
|
|
PDFJS.createObjectURL = (function createObjectURLClosure() {
|
|
// Blob/createObjectURL is not available, falling back to data schema.
|
|
var digits =
|
|
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
|
|
|
|
return function createObjectURL(data, contentType) {
|
|
if (!PDFJS.disableCreateObjectURL &&
|
|
typeof URL !== 'undefined' && URL.createObjectURL) {
|
|
var blob = PDFJS.createBlob(data, contentType);
|
|
return URL.createObjectURL(blob);
|
|
}
|
|
|
|
var buffer = 'data:' + contentType + ';base64,';
|
|
for (var i = 0, ii = data.length; i < ii; i += 3) {
|
|
var b1 = data[i] & 0xFF;
|
|
var b2 = data[i + 1] & 0xFF;
|
|
var b3 = data[i + 2] & 0xFF;
|
|
var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4);
|
|
var d3 = i + 1 < ii ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64;
|
|
var d4 = i + 2 < ii ? (b3 & 0x3F) : 64;
|
|
buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4];
|
|
}
|
|
return buffer;
|
|
};
|
|
})();
|
|
|
|
function MessageHandler(name, comObj) {
|
|
this.name = name;
|
|
this.comObj = comObj;
|
|
this.callbackIndex = 1;
|
|
this.postMessageTransfers = true;
|
|
var callbacksCapabilities = this.callbacksCapabilities = {};
|
|
var ah = this.actionHandler = {};
|
|
|
|
ah['console_log'] = [function ahConsoleLog(data) {
|
|
console.log.apply(console, data);
|
|
}];
|
|
ah['console_error'] = [function ahConsoleError(data) {
|
|
console.error.apply(console, data);
|
|
}];
|
|
ah['_unsupported_feature'] = [function ah_unsupportedFeature(data) {
|
|
UnsupportedManager.notify(data);
|
|
}];
|
|
|
|
comObj.onmessage = function messageHandlerComObjOnMessage(event) {
|
|
var data = event.data;
|
|
if (data.isReply) {
|
|
var callbackId = data.callbackId;
|
|
if (data.callbackId in callbacksCapabilities) {
|
|
var callback = callbacksCapabilities[callbackId];
|
|
delete callbacksCapabilities[callbackId];
|
|
if ('error' in data) {
|
|
callback.reject(data.error);
|
|
} else {
|
|
callback.resolve(data.data);
|
|
}
|
|
} else {
|
|
error('Cannot resolve callback ' + callbackId);
|
|
}
|
|
} else if (data.action in ah) {
|
|
var action = ah[data.action];
|
|
if (data.callbackId) {
|
|
Promise.resolve().then(function () {
|
|
return action[0].call(action[1], data.data);
|
|
}).then(function (result) {
|
|
comObj.postMessage({
|
|
isReply: true,
|
|
callbackId: data.callbackId,
|
|
data: result
|
|
});
|
|
}, function (reason) {
|
|
comObj.postMessage({
|
|
isReply: true,
|
|
callbackId: data.callbackId,
|
|
error: reason
|
|
});
|
|
});
|
|
} else {
|
|
action[0].call(action[1], data.data);
|
|
}
|
|
} else {
|
|
error('Unknown 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 {Array} [transfers] Optional list of transfers/ArrayBuffers
|
|
*/
|
|
send: function messageHandlerSend(actionName, data, transfers) {
|
|
var message = {
|
|
action: actionName,
|
|
data: data
|
|
};
|
|
this.postMessage(message, transfers);
|
|
},
|
|
/**
|
|
* Sends a message to the comObj to invoke the action with the supplied data.
|
|
* Expects that other side will callback with the response.
|
|
* @param {String} actionName Action to call.
|
|
* @param {JSON} data JSON data to send.
|
|
* @param {Array} [transfers] Optional list of transfers/ArrayBuffers.
|
|
* @returns {Promise} Promise to be resolved with response data.
|
|
*/
|
|
sendWithPromise:
|
|
function messageHandlerSendWithPromise(actionName, data, transfers) {
|
|
var callbackId = this.callbackIndex++;
|
|
var message = {
|
|
action: actionName,
|
|
data: data,
|
|
callbackId: callbackId
|
|
};
|
|
var capability = createPromiseCapability();
|
|
this.callbacksCapabilities[callbackId] = capability;
|
|
try {
|
|
this.postMessage(message, transfers);
|
|
} catch (e) {
|
|
capability.reject(e);
|
|
}
|
|
return capability.promise;
|
|
},
|
|
/**
|
|
* Sends raw message to the comObj.
|
|
* @private
|
|
* @param message {Object} Raw message.
|
|
* @param transfers List of transfers/ArrayBuffers, or undefined.
|
|
*/
|
|
postMessage: function (message, transfers) {
|
|
if (transfers && this.postMessageTransfers) {
|
|
this.comObj.postMessage(message, transfers);
|
|
} else {
|
|
this.comObj.postMessage(message);
|
|
}
|
|
}
|
|
};
|
|
|
|
function loadJpegStream(id, imageUrl, objs) {
|
|
var img = new Image();
|
|
img.onload = (function loadJpegStream_onloadClosure() {
|
|
objs.resolve(id, img);
|
|
});
|
|
img.onerror = (function loadJpegStream_onerrorClosure() {
|
|
objs.resolve(id, null);
|
|
warn('Error during JPEG image loading');
|
|
});
|
|
img.src = imageUrl;
|
|
}
|
|
|
|
|
|
/**
|
|
* The maximum allowed image size in total pixels e.g. width * height. Images
|
|
* above this value will not be drawn. Use -1 for no limit.
|
|
* @var {number}
|
|
*/
|
|
PDFJS.maxImageSize = (PDFJS.maxImageSize === undefined ?
|
|
-1 : PDFJS.maxImageSize);
|
|
|
|
/**
|
|
* The url of where the predefined Adobe CMaps are located. Include trailing
|
|
* slash.
|
|
* @var {string}
|
|
*/
|
|
PDFJS.cMapUrl = (PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl);
|
|
|
|
/**
|
|
* Specifies if CMaps are binary packed.
|
|
* @var {boolean}
|
|
*/
|
|
PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked;
|
|
|
|
/**
|
|
* By default fonts are converted to OpenType fonts and loaded via font face
|
|
* rules. If disabled, the font will be rendered using a built in font renderer
|
|
* that constructs the glyphs with primitive path commands.
|
|
* @var {boolean}
|
|
*/
|
|
PDFJS.disableFontFace = (PDFJS.disableFontFace === undefined ?
|
|
false : PDFJS.disableFontFace);
|
|
|
|
/**
|
|
* Path for image resources, mainly for annotation icons. Include trailing
|
|
* slash.
|
|
* @var {string}
|
|
*/
|
|
PDFJS.imageResourcesPath = (PDFJS.imageResourcesPath === undefined ?
|
|
'' : PDFJS.imageResourcesPath);
|
|
|
|
/**
|
|
* Disable the web worker and run all code on the main thread. This will happen
|
|
* automatically if the browser doesn't support workers or sending typed arrays
|
|
* to workers.
|
|
* @var {boolean}
|
|
*/
|
|
PDFJS.disableWorker = (PDFJS.disableWorker === undefined ?
|
|
false : PDFJS.disableWorker);
|
|
|
|
/**
|
|
* Path and filename of the worker file. Required when the worker is enabled in
|
|
* development mode. If unspecified in the production build, the worker will be
|
|
* loaded based on the location of the pdf.js file.
|
|
* @var {string}
|
|
*/
|
|
PDFJS.workerSrc = (PDFJS.workerSrc === undefined ? null : PDFJS.workerSrc);
|
|
|
|
/**
|
|
* Disable range request loading of PDF files. When enabled and if the server
|
|
* supports partial content requests then the PDF will be fetched in chunks.
|
|
* Enabled (false) by default.
|
|
* @var {boolean}
|
|
*/
|
|
PDFJS.disableRange = (PDFJS.disableRange === undefined ?
|
|
false : PDFJS.disableRange);
|
|
|
|
/**
|
|
* Disable streaming of PDF file data. By default PDF.js attempts to load PDF
|
|
* in chunks. This default behavior can be disabled.
|
|
* @var {boolean}
|
|
*/
|
|
PDFJS.disableStream = (PDFJS.disableStream === undefined ?
|
|
false : PDFJS.disableStream);
|
|
|
|
/**
|
|
* Disable pre-fetching of PDF file data. When range requests are enabled PDF.js
|
|
* will automatically keep fetching more data even if it isn't needed to display
|
|
* the current page. This default behavior can be disabled.
|
|
*
|
|
* NOTE: It is also necessary to disable streaming, see above,
|
|
* in order for disabling of pre-fetching to work correctly.
|
|
* @var {boolean}
|
|
*/
|
|
PDFJS.disableAutoFetch = (PDFJS.disableAutoFetch === undefined ?
|
|
false : PDFJS.disableAutoFetch);
|
|
|
|
/**
|
|
* Enables special hooks for debugging PDF.js.
|
|
* @var {boolean}
|
|
*/
|
|
PDFJS.pdfBug = (PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug);
|
|
|
|
/**
|
|
* Enables transfer usage in postMessage for ArrayBuffers.
|
|
* @var {boolean}
|
|
*/
|
|
PDFJS.postMessageTransfers = (PDFJS.postMessageTransfers === undefined ?
|
|
true : PDFJS.postMessageTransfers);
|
|
|
|
/**
|
|
* Disables URL.createObjectURL usage.
|
|
* @var {boolean}
|
|
*/
|
|
PDFJS.disableCreateObjectURL = (PDFJS.disableCreateObjectURL === undefined ?
|
|
false : PDFJS.disableCreateObjectURL);
|
|
|
|
/**
|
|
* Disables WebGL usage.
|
|
* @var {boolean}
|
|
*/
|
|
PDFJS.disableWebGL = (PDFJS.disableWebGL === undefined ?
|
|
true : PDFJS.disableWebGL);
|
|
|
|
/**
|
|
* Disables fullscreen support, and by extension Presentation Mode,
|
|
* in browsers which support the fullscreen API.
|
|
* @var {boolean}
|
|
*/
|
|
PDFJS.disableFullscreen = (PDFJS.disableFullscreen === undefined ?
|
|
false : PDFJS.disableFullscreen);
|
|
|
|
/**
|
|
* Enables CSS only zooming.
|
|
* @var {boolean}
|
|
*/
|
|
PDFJS.useOnlyCssZoom = (PDFJS.useOnlyCssZoom === undefined ?
|
|
false : PDFJS.useOnlyCssZoom);
|
|
|
|
/**
|
|
* Controls the logging level.
|
|
* The constants from PDFJS.VERBOSITY_LEVELS should be used:
|
|
* - errors
|
|
* - warnings [default]
|
|
* - infos
|
|
* @var {number}
|
|
*/
|
|
PDFJS.verbosity = (PDFJS.verbosity === undefined ?
|
|
PDFJS.VERBOSITY_LEVELS.warnings : PDFJS.verbosity);
|
|
|
|
/**
|
|
* The maximum supported canvas size in total pixels e.g. width * height.
|
|
* The default value is 4096 * 4096. Use -1 for no limit.
|
|
* @var {number}
|
|
*/
|
|
PDFJS.maxCanvasPixels = (PDFJS.maxCanvasPixels === undefined ?
|
|
16777216 : PDFJS.maxCanvasPixels);
|
|
|
|
/**
|
|
* Opens external links in a new window if enabled. The default behavior opens
|
|
* external links in the PDF.js window.
|
|
* @var {boolean}
|
|
*/
|
|
PDFJS.openExternalLinksInNewWindow = (
|
|
PDFJS.openExternalLinksInNewWindow === undefined ?
|
|
false : PDFJS.openExternalLinksInNewWindow);
|
|
|
|
/**
|
|
* Document initialization / loading parameters object.
|
|
*
|
|
* @typedef {Object} DocumentInitParameters
|
|
* @property {string} url - The URL of the PDF.
|
|
* @property {TypedArray|Array|string} data - Binary PDF data. Use typed arrays
|
|
* (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded,
|
|
* use atob() to convert it to a binary string first.
|
|
* @property {Object} httpHeaders - Basic authentication headers.
|
|
* @property {boolean} withCredentials - Indicates whether or not cross-site
|
|
* Access-Control requests should be made using credentials such as cookies
|
|
* or authorization headers. The default is false.
|
|
* @property {string} password - For decrypting password-protected PDFs.
|
|
* @property {TypedArray} initialData - A typed array with the first portion or
|
|
* all of the pdf data. Used by the extension since some data is already
|
|
* loaded before the switch to range requests.
|
|
* @property {number} length - The PDF file length. It's used for progress
|
|
* reports and range requests operations.
|
|
* @property {PDFDataRangeTransport} range
|
|
*/
|
|
|
|
/**
|
|
* @typedef {Object} PDFDocumentStats
|
|
* @property {Array} streamTypes - Used stream types in the document (an item
|
|
* is set to true if specific stream ID was used in the document).
|
|
* @property {Array} fontTypes - Used font type in the document (an item is set
|
|
* to true if specific font ID was used in the document).
|
|
*/
|
|
|
|
/**
|
|
* This is the main entry point for loading a PDF and interacting with it.
|
|
* NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)
|
|
* is used, which means it must follow the same origin rules that any XHR does
|
|
* e.g. No cross domain requests without CORS.
|
|
*
|
|
* @param {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src
|
|
* Can be a url to where a PDF is located, a typed array (Uint8Array)
|
|
* already populated with data or parameter object.
|
|
*
|
|
* @param {PDFDataRangeTransport} pdfDataRangeTransport (deprecated) It is used
|
|
* if you want to manually serve range requests for data in the PDF.
|
|
*
|
|
* @param {function} passwordCallback (deprecated) It is used to request a
|
|
* password if wrong or no password was provided. The callback receives two
|
|
* parameters: function that needs to be called with new password and reason
|
|
* (see {PasswordResponses}).
|
|
*
|
|
* @param {function} progressCallback (deprecated) It is used to be able to
|
|
* monitor the loading progress of the PDF file (necessary to implement e.g.
|
|
* a loading bar). The callback receives an {Object} with the properties:
|
|
* {number} loaded and {number} total.
|
|
*
|
|
* @return {PDFDocumentLoadingTask}
|
|
*/
|
|
PDFJS.getDocument = function getDocument(src,
|
|
pdfDataRangeTransport,
|
|
passwordCallback,
|
|
progressCallback) {
|
|
var task = new PDFDocumentLoadingTask();
|
|
|
|
// Support of the obsolete arguments (for compatibility with API v1.0)
|
|
if (pdfDataRangeTransport) {
|
|
if (!(pdfDataRangeTransport instanceof PDFDataRangeTransport)) {
|
|
// Not a PDFDataRangeTransport instance, trying to add missing properties.
|
|
pdfDataRangeTransport = Object.create(pdfDataRangeTransport);
|
|
pdfDataRangeTransport.length = src.length;
|
|
pdfDataRangeTransport.initialData = src.initialData;
|
|
}
|
|
src = Object.create(src);
|
|
src.range = pdfDataRangeTransport;
|
|
}
|
|
task.onPassword = passwordCallback || null;
|
|
task.onProgress = progressCallback || null;
|
|
|
|
var workerInitializedCapability, transport;
|
|
var source;
|
|
if (typeof src === 'string') {
|
|
source = { url: src };
|
|
} else if (isArrayBuffer(src)) {
|
|
source = { data: src };
|
|
} else if (src instanceof PDFDataRangeTransport) {
|
|
source = { range: src };
|
|
} else {
|
|
if (typeof src !== 'object') {
|
|
error('Invalid parameter in getDocument, need either Uint8Array, ' +
|
|
'string or a parameter object');
|
|
}
|
|
if (!src.url && !src.data && !src.range) {
|
|
error('Invalid parameter object: need either .data, .range or .url');
|
|
}
|
|
|
|
source = src;
|
|
}
|
|
|
|
var params = {};
|
|
for (var key in source) {
|
|
if (key === 'url' && typeof window !== 'undefined') {
|
|
// The full path is required in the 'url' field.
|
|
params[key] = combineUrl(window.location.href, source[key]);
|
|
continue;
|
|
} else if (key === 'range') {
|
|
continue;
|
|
} else if (key === 'data' && !(source[key] instanceof Uint8Array)) {
|
|
// Converting string or array-like data to Uint8Array.
|
|
var pdfBytes = source[key];
|
|
if (typeof pdfBytes === 'string') {
|
|
params[key] = stringToBytes(pdfBytes);
|
|
} else if (typeof pdfBytes === 'object' && pdfBytes !== null &&
|
|
!isNaN(pdfBytes.length)) {
|
|
params[key] = new Uint8Array(pdfBytes);
|
|
} else {
|
|
error('Invalid PDF binary data: either typed array, string or ' +
|
|
'array-like object is expected in the data property.');
|
|
}
|
|
continue;
|
|
}
|
|
params[key] = source[key];
|
|
}
|
|
|
|
workerInitializedCapability = createPromiseCapability();
|
|
transport = new WorkerTransport(workerInitializedCapability, source.range);
|
|
workerInitializedCapability.promise.then(function transportInitialized() {
|
|
transport.fetchDocument(task, params);
|
|
});
|
|
|
|
return task;
|
|
};
|
|
|
|
/**
|
|
* PDF document loading operation.
|
|
* @class
|
|
*/
|
|
var PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() {
|
|
/** @constructs PDFDocumentLoadingTask */
|
|
function PDFDocumentLoadingTask() {
|
|
this._capability = createPromiseCapability();
|
|
|
|
/**
|
|
* Callback to request a password if wrong or no password was provided.
|
|
* The callback receives two parameters: function that needs to be called
|
|
* with new password and reason (see {PasswordResponses}).
|
|
*/
|
|
this.onPassword = null;
|
|
|
|
/**
|
|
* Callback to be able to monitor the loading progress of the PDF file
|
|
* (necessary to implement e.g. a loading bar). The callback receives
|
|
* an {Object} with the properties: {number} loaded and {number} total.
|
|
*/
|
|
this.onProgress = null;
|
|
}
|
|
|
|
PDFDocumentLoadingTask.prototype =
|
|
/** @lends PDFDocumentLoadingTask.prototype */ {
|
|
/**
|
|
* @return {Promise}
|
|
*/
|
|
get promise() {
|
|
return this._capability.promise;
|
|
},
|
|
|
|
// TODO add cancel or abort method
|
|
|
|
/**
|
|
* Registers callbacks to indicate the document loading completion.
|
|
*
|
|
* @param {function} onFulfilled The callback for the loading completion.
|
|
* @param {function} onRejected The callback for the loading failure.
|
|
* @return {Promise} A promise that is resolved after the onFulfilled or
|
|
* onRejected callback.
|
|
*/
|
|
then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) {
|
|
return this.promise.then.apply(this.promise, arguments);
|
|
}
|
|
};
|
|
|
|
return PDFDocumentLoadingTask;
|
|
})();
|
|
|
|
/**
|
|
* Abstract class to support range requests file loading.
|
|
* @class
|
|
*/
|
|
var PDFDataRangeTransport = (function pdfDataRangeTransportClosure() {
|
|
/**
|
|
* @constructs PDFDataRangeTransport
|
|
* @param {number} length
|
|
* @param {Uint8Array} initialData
|
|
*/
|
|
function PDFDataRangeTransport(length, initialData) {
|
|
this.length = length;
|
|
this.initialData = initialData;
|
|
|
|
this._rangeListeners = [];
|
|
this._progressListeners = [];
|
|
this._progressiveReadListeners = [];
|
|
this._readyCapability = createPromiseCapability();
|
|
}
|
|
PDFDataRangeTransport.prototype =
|
|
/** @lends PDFDataRangeTransport.prototype */ {
|
|
addRangeListener:
|
|
function PDFDataRangeTransport_addRangeListener(listener) {
|
|
this._rangeListeners.push(listener);
|
|
},
|
|
|
|
addProgressListener:
|
|
function PDFDataRangeTransport_addProgressListener(listener) {
|
|
this._progressListeners.push(listener);
|
|
},
|
|
|
|
addProgressiveReadListener:
|
|
function PDFDataRangeTransport_addProgressiveReadListener(listener) {
|
|
this._progressiveReadListeners.push(listener);
|
|
},
|
|
|
|
onDataRange: function PDFDataRangeTransport_onDataRange(begin, chunk) {
|
|
var listeners = this._rangeListeners;
|
|
for (var i = 0, n = listeners.length; i < n; ++i) {
|
|
listeners[i](begin, chunk);
|
|
}
|
|
},
|
|
|
|
onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) {
|
|
this._readyCapability.promise.then(function () {
|
|
var listeners = this._progressListeners;
|
|
for (var i = 0, n = listeners.length; i < n; ++i) {
|
|
listeners[i](loaded);
|
|
}
|
|
}.bind(this));
|
|
},
|
|
|
|
onDataProgressiveRead:
|
|
function PDFDataRangeTransport_onDataProgress(chunk) {
|
|
this._readyCapability.promise.then(function () {
|
|
var listeners = this._progressiveReadListeners;
|
|
for (var i = 0, n = listeners.length; i < n; ++i) {
|
|
listeners[i](chunk);
|
|
}
|
|
}.bind(this));
|
|
},
|
|
|
|
transportReady: function PDFDataRangeTransport_transportReady() {
|
|
this._readyCapability.resolve();
|
|
},
|
|
|
|
requestDataRange:
|
|
function PDFDataRangeTransport_requestDataRange(begin, end) {
|
|
throw new Error('Abstract method PDFDataRangeTransport.requestDataRange');
|
|
}
|
|
};
|
|
return PDFDataRangeTransport;
|
|
})();
|
|
|
|
PDFJS.PDFDataRangeTransport = PDFDataRangeTransport;
|
|
|
|
/**
|
|
* Proxy to a PDFDocument in the worker thread. Also, contains commonly used
|
|
* properties that can be read synchronously.
|
|
* @class
|
|
*/
|
|
var PDFDocumentProxy = (function PDFDocumentProxyClosure() {
|
|
function PDFDocumentProxy(pdfInfo, transport) {
|
|
this.pdfInfo = pdfInfo;
|
|
this.transport = transport;
|
|
}
|
|
PDFDocumentProxy.prototype = /** @lends PDFDocumentProxy.prototype */ {
|
|
/**
|
|
* @return {number} Total number of pages the PDF contains.
|
|
*/
|
|
get numPages() {
|
|
return this.pdfInfo.numPages;
|
|
},
|
|
/**
|
|
* @return {string} A unique ID to identify a PDF. Not guaranteed to be
|
|
* unique.
|
|
*/
|
|
get fingerprint() {
|
|
return this.pdfInfo.fingerprint;
|
|
},
|
|
/**
|
|
* @param {number} pageNumber The page number to get. The first page is 1.
|
|
* @return {Promise} A promise that is resolved with a {@link PDFPageProxy}
|
|
* object.
|
|
*/
|
|
getPage: function PDFDocumentProxy_getPage(pageNumber) {
|
|
return this.transport.getPage(pageNumber);
|
|
},
|
|
/**
|
|
* @param {{num: number, gen: number}} ref The page reference. Must have
|
|
* the 'num' and 'gen' properties.
|
|
* @return {Promise} A promise that is resolved with the page index that is
|
|
* associated with the reference.
|
|
*/
|
|
getPageIndex: function PDFDocumentProxy_getPageIndex(ref) {
|
|
return this.transport.getPageIndex(ref);
|
|
},
|
|
/**
|
|
* @return {Promise} A promise that is resolved with a lookup table for
|
|
* mapping named destinations to reference numbers.
|
|
*
|
|
* This can be slow for large documents: use getDestination instead
|
|
*/
|
|
getDestinations: function PDFDocumentProxy_getDestinations() {
|
|
return this.transport.getDestinations();
|
|
},
|
|
/**
|
|
* @param {string} id The named destination to get.
|
|
* @return {Promise} A promise that is resolved with all information
|
|
* of the given named destination.
|
|
*/
|
|
getDestination: function PDFDocumentProxy_getDestination(id) {
|
|
return this.transport.getDestination(id);
|
|
},
|
|
/**
|
|
* @return {Promise} A promise that is resolved with a lookup table for
|
|
* mapping named attachments to their content.
|
|
*/
|
|
getAttachments: function PDFDocumentProxy_getAttachments() {
|
|
return this.transport.getAttachments();
|
|
},
|
|
/**
|
|
* @return {Promise} A promise that is resolved with an array of all the
|
|
* JavaScript strings in the name tree.
|
|
*/
|
|
getJavaScript: function PDFDocumentProxy_getJavaScript() {
|
|
return this.transport.getJavaScript();
|
|
},
|
|
/**
|
|
* @return {Promise} A promise that is resolved with an {Array} that is a
|
|
* tree outline (if it has one) of the PDF. The tree is in the format of:
|
|
* [
|
|
* {
|
|
* title: string,
|
|
* bold: boolean,
|
|
* italic: boolean,
|
|
* color: rgb array,
|
|
* dest: dest obj,
|
|
* items: array of more items like this
|
|
* },
|
|
* ...
|
|
* ].
|
|
*/
|
|
getOutline: function PDFDocumentProxy_getOutline() {
|
|
return this.transport.getOutline();
|
|
},
|
|
/**
|
|
* @return {Promise} A promise that is resolved with an {Object} that has
|
|
* info and metadata properties. Info is an {Object} filled with anything
|
|
* available in the information dictionary and similarly metadata is a
|
|
* {Metadata} object with information from the metadata section of the PDF.
|
|
*/
|
|
getMetadata: function PDFDocumentProxy_getMetadata() {
|
|
return this.transport.getMetadata();
|
|
},
|
|
/**
|
|
* @return {Promise} A promise that is resolved with a TypedArray that has
|
|
* the raw data from the PDF.
|
|
*/
|
|
getData: function PDFDocumentProxy_getData() {
|
|
return this.transport.getData();
|
|
},
|
|
/**
|
|
* @return {Promise} A promise that is resolved when the document's data
|
|
* is loaded. It is resolved with an {Object} that contains the length
|
|
* property that indicates size of the PDF data in bytes.
|
|
*/
|
|
getDownloadInfo: function PDFDocumentProxy_getDownloadInfo() {
|
|
return this.transport.downloadInfoCapability.promise;
|
|
},
|
|
/**
|
|
* @return {Promise} A promise this is resolved with current stats about
|
|
* document structures (see {@link PDFDocumentStats}).
|
|
*/
|
|
getStats: function PDFDocumentProxy_getStats() {
|
|
return this.transport.getStats();
|
|
},
|
|
/**
|
|
* Cleans up resources allocated by the document, e.g. created @font-face.
|
|
*/
|
|
cleanup: function PDFDocumentProxy_cleanup() {
|
|
this.transport.startCleanup();
|
|
},
|
|
/**
|
|
* Destroys current document instance and terminates worker.
|
|
*/
|
|
destroy: function PDFDocumentProxy_destroy() {
|
|
this.transport.destroy();
|
|
}
|
|
};
|
|
return PDFDocumentProxy;
|
|
})();
|
|
|
|
/**
|
|
* Page text content.
|
|
*
|
|
* @typedef {Object} TextContent
|
|
* @property {array} items - array of {@link TextItem}
|
|
* @property {Object} styles - {@link TextStyles} objects, indexed by font
|
|
* name.
|
|
*/
|
|
|
|
/**
|
|
* Page text content part.
|
|
*
|
|
* @typedef {Object} TextItem
|
|
* @property {string} str - text content.
|
|
* @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'.
|
|
* @property {array} transform - transformation matrix.
|
|
* @property {number} width - width in device space.
|
|
* @property {number} height - height in device space.
|
|
* @property {string} fontName - font name used by pdf.js for converted font.
|
|
*/
|
|
|
|
/**
|
|
* Text style.
|
|
*
|
|
* @typedef {Object} TextStyle
|
|
* @property {number} ascent - font ascent.
|
|
* @property {number} descent - font descent.
|
|
* @property {boolean} vertical - text is in vertical mode.
|
|
* @property {string} fontFamily - possible font family
|
|
*/
|
|
|
|
/**
|
|
* Page render parameters.
|
|
*
|
|
* @typedef {Object} RenderParameters
|
|
* @property {Object} canvasContext - A 2D context of a DOM Canvas object.
|
|
* @property {PDFJS.PageViewport} viewport - Rendering viewport obtained by
|
|
* calling of PDFPage.getViewport method.
|
|
* @property {string} intent - Rendering intent, can be 'display' or 'print'
|
|
* (default value is 'display').
|
|
* @property {Object} imageLayer - (optional) An object that has beginLayout,
|
|
* endLayout and appendImage functions.
|
|
* @property {function} continueCallback - (deprecated) A function that will be
|
|
* called each time the rendering is paused. To continue
|
|
* rendering call the function that is the first argument
|
|
* to the callback.
|
|
*/
|
|
|
|
/**
|
|
* PDF page operator list.
|
|
*
|
|
* @typedef {Object} PDFOperatorList
|
|
* @property {Array} fnArray - Array containing the operator functions.
|
|
* @property {Array} argsArray - Array containing the arguments of the
|
|
* functions.
|
|
*/
|
|
|
|
/**
|
|
* Proxy to a PDFPage in the worker thread.
|
|
* @class
|
|
*/
|
|
var PDFPageProxy = (function PDFPageProxyClosure() {
|
|
function PDFPageProxy(pageIndex, pageInfo, transport) {
|
|
this.pageIndex = pageIndex;
|
|
this.pageInfo = pageInfo;
|
|
this.transport = transport;
|
|
this.stats = new StatTimer();
|
|
this.stats.enabled = !!globalScope.PDFJS.enableStats;
|
|
this.commonObjs = transport.commonObjs;
|
|
this.objs = new PDFObjects();
|
|
this.cleanupAfterRender = false;
|
|
this.pendingDestroy = false;
|
|
this.intentStates = {};
|
|
}
|
|
PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ {
|
|
/**
|
|
* @return {number} Page number of the page. First page is 1.
|
|
*/
|
|
get pageNumber() {
|
|
return this.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 {PDFJS.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 = this.transport.getAnnotations(this.pageIndex);
|
|
this.annotationsPromise = promise;
|
|
return promise;
|
|
},
|
|
/**
|
|
* Begins the process of rendering a page to the desired context.
|
|
* @param {RenderParameters} params Page render parameters.
|
|
* @return {RenderTask} An object that contains the promise, which
|
|
* is resolved when the page finishes rendering.
|
|
*/
|
|
render: function PDFPageProxy_render(params) {
|
|
var stats = this.stats;
|
|
stats.time('Overall');
|
|
|
|
// If there was a pending destroy cancel it so no cleanup happens during
|
|
// this call to render.
|
|
this.pendingDestroy = false;
|
|
|
|
var renderingIntent = (params.intent === 'print' ? 'print' : 'display');
|
|
|
|
if (!this.intentStates[renderingIntent]) {
|
|
this.intentStates[renderingIntent] = {};
|
|
}
|
|
var intentState = this.intentStates[renderingIntent];
|
|
|
|
// If there's no displayReadyCapability yet, then the operatorList
|
|
// was never requested before. Make the request and create the promise.
|
|
if (!intentState.displayReadyCapability) {
|
|
intentState.receivingOperatorList = true;
|
|
intentState.displayReadyCapability = createPromiseCapability();
|
|
intentState.operatorList = {
|
|
fnArray: [],
|
|
argsArray: [],
|
|
lastChunk: false
|
|
};
|
|
|
|
this.stats.time('Page Request');
|
|
this.transport.messageHandler.send('RenderPageRequest', {
|
|
pageIndex: this.pageNumber - 1,
|
|
intent: renderingIntent
|
|
});
|
|
}
|
|
|
|
var internalRenderTask = new InternalRenderTask(complete, params,
|
|
this.objs,
|
|
this.commonObjs,
|
|
intentState.operatorList,
|
|
this.pageNumber);
|
|
if (!intentState.renderTasks) {
|
|
intentState.renderTasks = [];
|
|
}
|
|
intentState.renderTasks.push(internalRenderTask);
|
|
var renderTask = internalRenderTask.task;
|
|
|
|
// Obsolete parameter support
|
|
if (params.continueCallback) {
|
|
renderTask.onContinue = params.continueCallback;
|
|
}
|
|
|
|
var self = this;
|
|
intentState.displayReadyCapability.promise.then(
|
|
function pageDisplayReadyPromise(transparency) {
|
|
if (self.pendingDestroy) {
|
|
complete();
|
|
return;
|
|
}
|
|
stats.time('Rendering');
|
|
internalRenderTask.initalizeGraphics(transparency);
|
|
internalRenderTask.operatorListChanged();
|
|
},
|
|
function pageDisplayReadPromiseError(reason) {
|
|
complete(reason);
|
|
}
|
|
);
|
|
|
|
function complete(error) {
|
|
var i = intentState.renderTasks.indexOf(internalRenderTask);
|
|
if (i >= 0) {
|
|
intentState.renderTasks.splice(i, 1);
|
|
}
|
|
|
|
if (self.cleanupAfterRender) {
|
|
self.pendingDestroy = true;
|
|
}
|
|
self._tryDestroy();
|
|
|
|
if (error) {
|
|
internalRenderTask.capability.reject(error);
|
|
} else {
|
|
internalRenderTask.capability.resolve();
|
|
}
|
|
stats.timeEnd('Rendering');
|
|
stats.timeEnd('Overall');
|
|
}
|
|
|
|
return renderTask;
|
|
},
|
|
|
|
/**
|
|
* @return {Promise} A promise resolved with an {@link PDFOperatorList}
|
|
* object that represents page's operator list.
|
|
*/
|
|
getOperatorList: function PDFPageProxy_getOperatorList() {
|
|
function operatorListChanged() {
|
|
if (intentState.operatorList.lastChunk) {
|
|
intentState.opListReadCapability.resolve(intentState.operatorList);
|
|
}
|
|
}
|
|
|
|
var renderingIntent = 'oplist';
|
|
if (!this.intentStates[renderingIntent]) {
|
|
this.intentStates[renderingIntent] = {};
|
|
}
|
|
var intentState = this.intentStates[renderingIntent];
|
|
|
|
if (!intentState.opListReadCapability) {
|
|
var opListTask = {};
|
|
opListTask.operatorListChanged = operatorListChanged;
|
|
intentState.receivingOperatorList = true;
|
|
intentState.opListReadCapability = createPromiseCapability();
|
|
intentState.renderTasks = [];
|
|
intentState.renderTasks.push(opListTask);
|
|
intentState.operatorList = {
|
|
fnArray: [],
|
|
argsArray: [],
|
|
lastChunk: false
|
|
};
|
|
|
|
this.transport.messageHandler.send('RenderPageRequest', {
|
|
pageIndex: this.pageIndex,
|
|
intent: renderingIntent
|
|
});
|
|
}
|
|
return intentState.opListReadCapability.promise;
|
|
},
|
|
|
|
/**
|
|
* @return {Promise} That is resolved a {@link TextContent}
|
|
* object that represent the page text content.
|
|
*/
|
|
getTextContent: function PDFPageProxy_getTextContent() {
|
|
return this.transport.messageHandler.sendWithPromise('GetTextContent', {
|
|
pageIndex: this.pageNumber - 1
|
|
});
|
|
},
|
|
/**
|
|
* Destroys resources allocated by the page.
|
|
*/
|
|
destroy: function PDFPageProxy_destroy() {
|
|
this.pendingDestroy = true;
|
|
this._tryDestroy();
|
|
},
|
|
/**
|
|
* For internal use only. Attempts to clean up if rendering is in a state
|
|
* where that's possible.
|
|
* @ignore
|
|
*/
|
|
_tryDestroy: function PDFPageProxy__destroy() {
|
|
if (!this.pendingDestroy ||
|
|
Object.keys(this.intentStates).some(function(intent) {
|
|
var intentState = this.intentStates[intent];
|
|
return (intentState.renderTasks.length !== 0 ||
|
|
intentState.receivingOperatorList);
|
|
}, this)) {
|
|
return;
|
|
}
|
|
|
|
Object.keys(this.intentStates).forEach(function(intent) {
|
|
delete this.intentStates[intent];
|
|
}, this);
|
|
this.objs.clear();
|
|
this.annotationsPromise = null;
|
|
this.pendingDestroy = false;
|
|
},
|
|
/**
|
|
* For internal use only.
|
|
* @ignore
|
|
*/
|
|
_startRenderPage: function PDFPageProxy_startRenderPage(transparency,
|
|
intent) {
|
|
var intentState = this.intentStates[intent];
|
|
// TODO Refactor RenderPageRequest to separate rendering
|
|
// and operator list logic
|
|
if (intentState.displayReadyCapability) {
|
|
intentState.displayReadyCapability.resolve(transparency);
|
|
}
|
|
},
|
|
/**
|
|
* For internal use only.
|
|
* @ignore
|
|
*/
|
|
_renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk,
|
|
intent) {
|
|
var intentState = this.intentStates[intent];
|
|
var i, ii;
|
|
// Add the new chunk to the current operator list.
|
|
for (i = 0, ii = operatorListChunk.length; i < ii; i++) {
|
|
intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]);
|
|
intentState.operatorList.argsArray.push(
|
|
operatorListChunk.argsArray[i]);
|
|
}
|
|
intentState.operatorList.lastChunk = operatorListChunk.lastChunk;
|
|
|
|
// Notify all the rendering tasks there are more operators to be consumed.
|
|
for (i = 0; i < intentState.renderTasks.length; i++) {
|
|
intentState.renderTasks[i].operatorListChanged();
|
|
}
|
|
|
|
if (operatorListChunk.lastChunk) {
|
|
intentState.receivingOperatorList = false;
|
|
this._tryDestroy();
|
|
}
|
|
}
|
|
};
|
|
return PDFPageProxy;
|
|
})();
|
|
|
|
/**
|
|
* For internal use only.
|
|
* @ignore
|
|
*/
|
|
var WorkerTransport = (function WorkerTransportClosure() {
|
|
function WorkerTransport(workerInitializedCapability, pdfDataRangeTransport) {
|
|
this.pdfDataRangeTransport = pdfDataRangeTransport;
|
|
this.workerInitializedCapability = workerInitializedCapability;
|
|
this.commonObjs = new PDFObjects();
|
|
|
|
this.loadingTask = null;
|
|
|
|
this.pageCache = [];
|
|
this.pagePromises = [];
|
|
this.downloadInfoCapability = createPromiseCapability();
|
|
|
|
// 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 !SINGLE_FILE
|
|
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);
|
|
workerInitializedCapability.resolve();
|
|
} else {
|
|
this.setupFakeWorker();
|
|
}
|
|
}.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, [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.');
|
|
}
|
|
}
|
|
//#endif
|
|
// Either workers are disabled, not supported or have thrown an exception.
|
|
// Thus, we fallback to a faked worker.
|
|
this.setupFakeWorker();
|
|
}
|
|
WorkerTransport.prototype = {
|
|
destroy: function WorkerTransport_destroy() {
|
|
this.pageCache = [];
|
|
this.pagePromises = [];
|
|
var self = this;
|
|
this.messageHandler.sendWithPromise('Terminate', null).then(function () {
|
|
FontLoader.clear();
|
|
if (self.worker) {
|
|
self.worker.terminate();
|
|
}
|
|
});
|
|
},
|
|
|
|
setupFakeWorker: function WorkerTransport_setupFakeWorker() {
|
|
globalScope.PDFJS.disableWorker = true;
|
|
|
|
if (!PDFJS.fakeWorkerFilesLoadedCapability) {
|
|
PDFJS.fakeWorkerFilesLoadedCapability = createPromiseCapability();
|
|
// 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.
|
|
//#if !PRODUCTION
|
|
Util.loadScript(PDFJS.workerSrc);
|
|
//#endif
|
|
//#if PRODUCTION && SINGLE_FILE
|
|
// PDFJS.fakeWorkerFilesLoadedCapability.resolve();
|
|
//#endif
|
|
//#if PRODUCTION && !SINGLE_FILE
|
|
// Util.loadScript(PDFJS.workerSrc, function() {
|
|
// PDFJS.fakeWorkerFilesLoadedCapability.resolve();
|
|
// });
|
|
//#endif
|
|
}
|
|
PDFJS.fakeWorkerFilesLoadedCapability.promise.then(function () {
|
|
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);
|
|
|
|
this.workerInitializedCapability.resolve();
|
|
}.bind(this));
|
|
},
|
|
|
|
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
|
|
});
|
|
});
|
|
|
|
pdfDataRangeTransport.addProgressiveReadListener(function(chunk) {
|
|
messageHandler.send('OnDataRange', {
|
|
chunk: chunk
|
|
});
|
|
});
|
|
|
|
messageHandler.on('RequestDataRange',
|
|
function transportDataRange(data) {
|
|
pdfDataRangeTransport.requestDataRange(data.begin, data.end);
|
|
}, this);
|
|
}
|
|
|
|
messageHandler.on('GetDoc', function transportDoc(data) {
|
|
var pdfInfo = data.pdfInfo;
|
|
this.numPages = data.pdfInfo.numPages;
|
|
var pdfDocument = new PDFDocumentProxy(pdfInfo, this);
|
|
this.pdfDocument = pdfDocument;
|
|
this.loadingTask._capability.resolve(pdfDocument);
|
|
}, this);
|
|
|
|
messageHandler.on('NeedPassword',
|
|
function transportNeedPassword(exception) {
|
|
var loadingTask = this.loadingTask;
|
|
if (loadingTask.onPassword) {
|
|
return loadingTask.onPassword(updatePassword,
|
|
PasswordResponses.NEED_PASSWORD);
|
|
}
|
|
loadingTask._capability.reject(
|
|
new PasswordException(exception.message, exception.code));
|
|
}, this);
|
|
|
|
messageHandler.on('IncorrectPassword',
|
|
function transportIncorrectPassword(exception) {
|
|
var loadingTask = this.loadingTask;
|
|
if (loadingTask.onPassword) {
|
|
return loadingTask.onPassword(updatePassword,
|
|
PasswordResponses.INCORRECT_PASSWORD);
|
|
}
|
|
loadingTask._capability.reject(
|
|
new PasswordException(exception.message, exception.code));
|
|
}, this);
|
|
|
|
messageHandler.on('InvalidPDF', function transportInvalidPDF(exception) {
|
|
this.loadingTask._capability.reject(
|
|
new InvalidPDFException(exception.message));
|
|
}, this);
|
|
|
|
messageHandler.on('MissingPDF', function transportMissingPDF(exception) {
|
|
this.loadingTask._capability.reject(
|
|
new MissingPDFException(exception.message));
|
|
}, this);
|
|
|
|
messageHandler.on('UnexpectedResponse',
|
|
function transportUnexpectedResponse(exception) {
|
|
this.loadingTask._capability.reject(
|
|
new UnexpectedResponseException(exception.message, exception.status));
|
|
}, this);
|
|
|
|
messageHandler.on('UnknownError',
|
|
function transportUnknownError(exception) {
|
|
this.loadingTask._capability.reject(
|
|
new UnknownErrorException(exception.message, exception.details));
|
|
}, this);
|
|
|
|
messageHandler.on('DataLoaded', function transportPage(data) {
|
|
this.downloadInfoCapability.resolve(data);
|
|
}, this);
|
|
|
|
messageHandler.on('PDFManagerReady', function transportPage(data) {
|
|
if (this.pdfDataRangeTransport) {
|
|
this.pdfDataRangeTransport.transportReady();
|
|
}
|
|
}, this);
|
|
|
|
messageHandler.on('StartRenderPage', function transportRender(data) {
|
|
var page = this.pageCache[data.pageIndex];
|
|
|
|
page.stats.timeEnd('Page Request');
|
|
page._startRenderPage(data.transparency, data.intent);
|
|
}, this);
|
|
|
|
messageHandler.on('RenderPageChunk', function transportRender(data) {
|
|
var page = this.pageCache[data.pageIndex];
|
|
|
|
page._renderPageChunk(data.operatorList, data.intent);
|
|
}, this);
|
|
|
|
messageHandler.on('commonobj', function transportObj(data) {
|
|
var id = data[0];
|
|
var type = data[1];
|
|
if (this.commonObjs.hasData(id)) {
|
|
return;
|
|
}
|
|
|
|
switch (type) {
|
|
case 'Font':
|
|
var exportedData = data[2];
|
|
|
|
var font;
|
|
if ('error' in exportedData) {
|
|
var error = exportedData.error;
|
|
warn('Error during font loading: ' + error);
|
|
this.commonObjs.resolve(id, error);
|
|
break;
|
|
} else {
|
|
font = new FontFaceObject(exportedData);
|
|
}
|
|
|
|
FontLoader.bind(
|
|
[font],
|
|
function fontReady(fontObjs) {
|
|
this.commonObjs.resolve(id, font);
|
|
}.bind(this)
|
|
);
|
|
break;
|
|
case 'FontPath':
|
|
this.commonObjs.resolve(id, data[2]);
|
|
break;
|
|
default:
|
|
error('Got unknown common object type ' + type);
|
|
}
|
|
}, this);
|
|
|
|
messageHandler.on('obj', function transportObj(data) {
|
|
var id = data[0];
|
|
var pageIndex = data[1];
|
|
var type = data[2];
|
|
var pageProxy = this.pageCache[pageIndex];
|
|
var imageData;
|
|
if (pageProxy.objs.hasData(id)) {
|
|
return;
|
|
}
|
|
|
|
switch (type) {
|
|
case 'JpegStream':
|
|
imageData = data[3];
|
|
loadJpegStream(id, imageData, pageProxy.objs);
|
|
break;
|
|
case 'Image':
|
|
imageData = data[3];
|
|
pageProxy.objs.resolve(id, imageData);
|
|
|
|
// heuristics that will allow not to store large data
|
|
var MAX_IMAGE_SIZE_TO_STORE = 8000000;
|
|
if (imageData && 'data' in imageData &&
|
|
imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) {
|
|
pageProxy.cleanupAfterRender = true;
|
|
}
|
|
break;
|
|
default:
|
|
error('Got unknown object type ' + type);
|
|
}
|
|
}, this);
|
|
|
|
messageHandler.on('DocProgress', function transportDocProgress(data) {
|
|
var loadingTask = this.loadingTask;
|
|
if (loadingTask.onProgress) {
|
|
loadingTask.onProgress({
|
|
loaded: data.loaded,
|
|
total: data.total
|
|
});
|
|
}
|
|
}, this);
|
|
|
|
messageHandler.on('PageError', function transportError(data) {
|
|
var page = this.pageCache[data.pageNum - 1];
|
|
var intentState = page.intentStates[data.intent];
|
|
if (intentState.displayReadyCapability) {
|
|
intentState.displayReadyCapability.reject(data.error);
|
|
} else {
|
|
error(data.error);
|
|
}
|
|
}, this);
|
|
|
|
messageHandler.on('JpegDecode', function(data) {
|
|
var imageUrl = data[0];
|
|
var components = data[1];
|
|
if (components !== 3 && components !== 1) {
|
|
return Promise.reject(
|
|
new Error('Only 3 components or 1 component can be returned'));
|
|
}
|
|
|
|
return new Promise(function (resolve, reject) {
|
|
var img = new Image();
|
|
img.onload = function () {
|
|
var width = img.width;
|
|
var height = img.height;
|
|
var size = width * height;
|
|
var rgbaLength = size * 4;
|
|
var buf = new Uint8Array(size * components);
|
|
var tmpCanvas = createScratchCanvas(width, height);
|
|
var tmpCtx = tmpCanvas.getContext('2d');
|
|
tmpCtx.drawImage(img, 0, 0);
|
|
var data = tmpCtx.getImageData(0, 0, width, height).data;
|
|
var i, j;
|
|
|
|
if (components === 3) {
|
|
for (i = 0, j = 0; i < rgbaLength; i += 4, j += 3) {
|
|
buf[j] = data[i];
|
|
buf[j + 1] = data[i + 1];
|
|
buf[j + 2] = data[i + 2];
|
|
}
|
|
} else if (components === 1) {
|
|
for (i = 0, j = 0; i < rgbaLength; i += 4, j++) {
|
|
buf[j] = data[i];
|
|
}
|
|
}
|
|
resolve({ data: buf, width: width, height: height});
|
|
};
|
|
img.onerror = function () {
|
|
reject(new Error('JpegDecode failed to load image'));
|
|
};
|
|
img.src = imageUrl;
|
|
});
|
|
});
|
|
},
|
|
|
|
fetchDocument: function WorkerTransport_fetchDocument(loadingTask, source) {
|
|
this.loadingTask = loadingTask;
|
|
|
|
source.disableAutoFetch = PDFJS.disableAutoFetch;
|
|
source.disableStream = PDFJS.disableStream;
|
|
source.chunkedViewerLoading = !!this.pdfDataRangeTransport;
|
|
if (this.pdfDataRangeTransport) {
|
|
source.length = this.pdfDataRangeTransport.length;
|
|
source.initialData = this.pdfDataRangeTransport.initialData;
|
|
}
|
|
this.messageHandler.send('GetDocRequest', {
|
|
source: source,
|
|
disableRange: PDFJS.disableRange,
|
|
maxImageSize: PDFJS.maxImageSize,
|
|
cMapUrl: PDFJS.cMapUrl,
|
|
cMapPacked: PDFJS.cMapPacked,
|
|
disableFontFace: PDFJS.disableFontFace,
|
|
disableCreateObjectURL: PDFJS.disableCreateObjectURL,
|
|
verbosity: PDFJS.verbosity
|
|
});
|
|
},
|
|
|
|
getData: function WorkerTransport_getData() {
|
|
return this.messageHandler.sendWithPromise('GetData', null);
|
|
},
|
|
|
|
getPage: function WorkerTransport_getPage(pageNumber, capability) {
|
|
if (pageNumber <= 0 || pageNumber > this.numPages ||
|
|
(pageNumber|0) !== pageNumber) {
|
|
return Promise.reject(new Error('Invalid page request'));
|
|
}
|
|
|
|
var pageIndex = pageNumber - 1;
|
|
if (pageIndex in this.pagePromises) {
|
|
return this.pagePromises[pageIndex];
|
|
}
|
|
var promise = this.messageHandler.sendWithPromise('GetPage', {
|
|
pageIndex: pageIndex
|
|
}).then(function (pageInfo) {
|
|
var page = new PDFPageProxy(pageIndex, pageInfo, this);
|
|
this.pageCache[pageIndex] = page;
|
|
return page;
|
|
}.bind(this));
|
|
this.pagePromises[pageIndex] = promise;
|
|
return promise;
|
|
},
|
|
|
|
getPageIndex: function WorkerTransport_getPageIndexByRef(ref) {
|
|
return this.messageHandler.sendWithPromise('GetPageIndex', { ref: ref });
|
|
},
|
|
|
|
getAnnotations: function WorkerTransport_getAnnotations(pageIndex) {
|
|
return this.messageHandler.sendWithPromise('GetAnnotations',
|
|
{ pageIndex: pageIndex });
|
|
},
|
|
|
|
getDestinations: function WorkerTransport_getDestinations() {
|
|
return this.messageHandler.sendWithPromise('GetDestinations', null);
|
|
},
|
|
|
|
getDestination: function WorkerTransport_getDestination(id) {
|
|
return this.messageHandler.sendWithPromise('GetDestination', { id: id } );
|
|
},
|
|
|
|
getAttachments: function WorkerTransport_getAttachments() {
|
|
return this.messageHandler.sendWithPromise('GetAttachments', null);
|
|
},
|
|
|
|
getJavaScript: function WorkerTransport_getJavaScript() {
|
|
return this.messageHandler.sendWithPromise('GetJavaScript', null);
|
|
},
|
|
|
|
getOutline: function WorkerTransport_getOutline() {
|
|
return this.messageHandler.sendWithPromise('GetOutline', null);
|
|
},
|
|
|
|
getMetadata: function WorkerTransport_getMetadata() {
|
|
return this.messageHandler.sendWithPromise('GetMetadata', null).
|
|
then(function transportMetadata(results) {
|
|
return {
|
|
info: results[0],
|
|
metadata: (results[1] ? new PDFJS.Metadata(results[1]) : null)
|
|
};
|
|
});
|
|
},
|
|
|
|
getStats: function WorkerTransport_getStats() {
|
|
return this.messageHandler.sendWithPromise('GetStats', null);
|
|
},
|
|
|
|
startCleanup: function WorkerTransport_startCleanup() {
|
|
this.messageHandler.sendWithPromise('Cleanup', null).
|
|
then(function endCleanup() {
|
|
for (var i = 0, ii = this.pageCache.length; i < ii; i++) {
|
|
var page = this.pageCache[i];
|
|
if (page) {
|
|
page.destroy();
|
|
}
|
|
}
|
|
this.commonObjs.clear();
|
|
FontLoader.clear();
|
|
}.bind(this));
|
|
}
|
|
};
|
|
return WorkerTransport;
|
|
|
|
})();
|
|
|
|
/**
|
|
* A PDF document and page is built of many objects. E.g. there are objects
|
|
* for fonts, images, rendering code and such. These objects might get processed
|
|
* inside of a worker. The `PDFObjects` implements some basic functions to
|
|
* manage these objects.
|
|
* @ignore
|
|
*/
|
|
var PDFObjects = (function PDFObjectsClosure() {
|
|
function PDFObjects() {
|
|
this.objs = {};
|
|
}
|
|
|
|
PDFObjects.prototype = {
|
|
/**
|
|
* Internal function.
|
|
* Ensures there is an object defined for `objId`.
|
|
*/
|
|
ensureObj: function PDFObjects_ensureObj(objId) {
|
|
if (this.objs[objId]) {
|
|
return this.objs[objId];
|
|
}
|
|
|
|
var obj = {
|
|
capability: createPromiseCapability(),
|
|
data: null,
|
|
resolved: false
|
|
};
|
|
this.objs[objId] = obj;
|
|
|
|
return obj;
|
|
},
|
|
|
|
/**
|
|
* If called *without* callback, this returns the data of `objId` but the
|
|
* object needs to be resolved. If it isn't, this function throws.
|
|
*
|
|
* If called *with* a callback, the callback is called with the data of the
|
|
* object once the object is resolved. That means, if you call this
|
|
* function and the object is already resolved, the callback gets called
|
|
* right away.
|
|
*/
|
|
get: function PDFObjects_get(objId, callback) {
|
|
// If there is a callback, then the get can be async and the object is
|
|
// not required to be resolved right now
|
|
if (callback) {
|
|
this.ensureObj(objId).capability.promise.then(callback);
|
|
return null;
|
|
}
|
|
|
|
// If there isn't a callback, the user expects to get the resolved data
|
|
// directly.
|
|
var obj = this.objs[objId];
|
|
|
|
// If there isn't an object yet or the object isn't resolved, then the
|
|
// data isn't ready yet!
|
|
if (!obj || !obj.resolved) {
|
|
error('Requesting object that isn\'t resolved yet ' + objId);
|
|
}
|
|
|
|
return obj.data;
|
|
},
|
|
|
|
/**
|
|
* Resolves the object `objId` with optional `data`.
|
|
*/
|
|
resolve: function PDFObjects_resolve(objId, data) {
|
|
var obj = this.ensureObj(objId);
|
|
|
|
obj.resolved = true;
|
|
obj.data = data;
|
|
obj.capability.resolve(data);
|
|
},
|
|
|
|
isResolved: function PDFObjects_isResolved(objId) {
|
|
var objs = this.objs;
|
|
|
|
if (!objs[objId]) {
|
|
return false;
|
|
} else {
|
|
return objs[objId].resolved;
|
|
}
|
|
},
|
|
|
|
hasData: function PDFObjects_hasData(objId) {
|
|
return this.isResolved(objId);
|
|
},
|
|
|
|
/**
|
|
* Returns the data of `objId` if object exists, null otherwise.
|
|
*/
|
|
getData: function PDFObjects_getData(objId) {
|
|
var objs = this.objs;
|
|
if (!objs[objId] || !objs[objId].resolved) {
|
|
return null;
|
|
} else {
|
|
return objs[objId].data;
|
|
}
|
|
},
|
|
|
|
clear: function PDFObjects_clear() {
|
|
this.objs = {};
|
|
}
|
|
};
|
|
return PDFObjects;
|
|
})();
|
|
|
|
/**
|
|
* Allows controlling of the rendering tasks.
|
|
* @class
|
|
*/
|
|
var RenderTask = (function RenderTaskClosure() {
|
|
function RenderTask(internalRenderTask) {
|
|
this._internalRenderTask = internalRenderTask;
|
|
|
|
/**
|
|
* Callback for incremental rendering -- a function that will be called
|
|
* each time the rendering is paused. To continue rendering call the
|
|
* function that is the first argument to the callback.
|
|
* @type {function}
|
|
*/
|
|
this.onContinue = null;
|
|
}
|
|
|
|
RenderTask.prototype = /** @lends RenderTask.prototype */ {
|
|
/**
|
|
* Promise for rendering task completion.
|
|
* @return {Promise}
|
|
*/
|
|
get promise() {
|
|
return this._internalRenderTask.capability.promise;
|
|
},
|
|
|
|
/**
|
|
* Cancels the rendering task. If the task is currently rendering it will
|
|
* not be cancelled until graphics pauses with a timeout. The promise that
|
|
* this object extends will resolved when cancelled.
|
|
*/
|
|
cancel: function RenderTask_cancel() {
|
|
this._internalRenderTask.cancel();
|
|
},
|
|
|
|
/**
|
|
* Registers callbacks to indicate the rendering task completion.
|
|
*
|
|
* @param {function} onFulfilled The callback for the rendering completion.
|
|
* @param {function} onRejected The callback for the rendering failure.
|
|
* @return {Promise} A promise that is resolved after the onFulfilled or
|
|
* onRejected callback.
|
|
*/
|
|
then: function RenderTask_then(onFulfilled, onRejected) {
|
|
return this.promise.then.apply(this.promise, arguments);
|
|
}
|
|
};
|
|
|
|
return RenderTask;
|
|
})();
|
|
|
|
/**
|
|
* For internal use only.
|
|
* @ignore
|
|
*/
|
|
var InternalRenderTask = (function InternalRenderTaskClosure() {
|
|
|
|
function InternalRenderTask(callback, params, objs, commonObjs, operatorList,
|
|
pageNumber) {
|
|
this.callback = callback;
|
|
this.params = params;
|
|
this.objs = objs;
|
|
this.commonObjs = commonObjs;
|
|
this.operatorListIdx = null;
|
|
this.operatorList = operatorList;
|
|
this.pageNumber = pageNumber;
|
|
this.running = false;
|
|
this.graphicsReadyCallback = null;
|
|
this.graphicsReady = false;
|
|
this.cancelled = false;
|
|
this.capability = createPromiseCapability();
|
|
this.task = new RenderTask(this);
|
|
// caching this-bound methods
|
|
this._continueBound = this._continue.bind(this);
|
|
this._scheduleNextBound = this._scheduleNext.bind(this);
|
|
this._nextBound = this._next.bind(this);
|
|
}
|
|
|
|
InternalRenderTask.prototype = {
|
|
|
|
initalizeGraphics:
|
|
function InternalRenderTask_initalizeGraphics(transparency) {
|
|
|
|
if (this.cancelled) {
|
|
return;
|
|
}
|
|
if (PDFJS.pdfBug && 'StepperManager' in globalScope &&
|
|
globalScope.StepperManager.enabled) {
|
|
this.stepper = globalScope.StepperManager.create(this.pageNumber - 1);
|
|
this.stepper.init(this.operatorList);
|
|
this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();
|
|
}
|
|
|
|
var params = this.params;
|
|
this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs,
|
|
this.objs, params.imageLayer);
|
|
|
|
this.gfx.beginDrawing(params.viewport, transparency);
|
|
this.operatorListIdx = 0;
|
|
this.graphicsReady = true;
|
|
if (this.graphicsReadyCallback) {
|
|
this.graphicsReadyCallback();
|
|
}
|
|
},
|
|
|
|
cancel: function InternalRenderTask_cancel() {
|
|
this.running = false;
|
|
this.cancelled = true;
|
|
this.callback('cancelled');
|
|
},
|
|
|
|
operatorListChanged: function InternalRenderTask_operatorListChanged() {
|
|
if (!this.graphicsReady) {
|
|
if (!this.graphicsReadyCallback) {
|
|
this.graphicsReadyCallback = this._continueBound;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (this.stepper) {
|
|
this.stepper.updateOperatorList(this.operatorList);
|
|
}
|
|
|
|
if (this.running) {
|
|
return;
|
|
}
|
|
this._continue();
|
|
},
|
|
|
|
_continue: function InternalRenderTask__continue() {
|
|
this.running = true;
|
|
if (this.cancelled) {
|
|
return;
|
|
}
|
|
if (this.task.onContinue) {
|
|
this.task.onContinue.call(this.task, this._scheduleNextBound);
|
|
} else {
|
|
this._scheduleNext();
|
|
}
|
|
},
|
|
|
|
_scheduleNext: function InternalRenderTask__scheduleNext() {
|
|
window.requestAnimationFrame(this._nextBound);
|
|
},
|
|
|
|
_next: function InternalRenderTask__next() {
|
|
if (this.cancelled) {
|
|
return;
|
|
}
|
|
this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList,
|
|
this.operatorListIdx,
|
|
this._continueBound,
|
|
this.stepper);
|
|
if (this.operatorListIdx === this.operatorList.argsArray.length) {
|
|
this.running = false;
|
|
if (this.operatorList.lastChunk) {
|
|
this.gfx.endDrawing();
|
|
this.callback();
|
|
}
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
return InternalRenderTask;
|
|
})();
|
|
|
|
|
|
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;
|
|
// Maximum font size that would be used during canvas fillText operations.
|
|
var MAX_FONT_SIZE = 100;
|
|
var MAX_GROUP_SIZE = 4096;
|
|
|
|
// Heuristic value used when enforcing minimum line widths.
|
|
var MIN_WIDTH_FACTOR = 0.65;
|
|
|
|
var COMPILE_TYPE3_GLYPHS = true;
|
|
var MAX_SIZE_TO_COMPILE = 1000;
|
|
|
|
var FULL_CHUNK_HEIGHT = 16;
|
|
|
|
function createScratchCanvas(width, height) {
|
|
var canvas = document.createElement('canvas');
|
|
canvas.width = width;
|
|
canvas.height = height;
|
|
return canvas;
|
|
}
|
|
|
|
function addContextCurrentTransform(ctx) {
|
|
// If the context doesn't expose a `mozCurrentTransform`, add a JS based one.
|
|
if (!ctx.mozCurrentTransform) {
|
|
ctx._originalSave = ctx.save;
|
|
ctx._originalRestore = ctx.restore;
|
|
ctx._originalRotate = ctx.rotate;
|
|
ctx._originalScale = ctx.scale;
|
|
ctx._originalTranslate = ctx.translate;
|
|
ctx._originalTransform = ctx.transform;
|
|
ctx._originalSetTransform = ctx.setTransform;
|
|
|
|
ctx._transformMatrix = ctx._transformMatrix || [1, 0, 0, 1, 0, 0];
|
|
ctx._transformStack = [];
|
|
|
|
Object.defineProperty(ctx, 'mozCurrentTransform', {
|
|
get: function getCurrentTransform() {
|
|
return this._transformMatrix;
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(ctx, 'mozCurrentTransformInverse', {
|
|
get: function getCurrentTransformInverse() {
|
|
// Calculation done using WolframAlpha:
|
|
// http://www.wolframalpha.com/input/?
|
|
// i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}}
|
|
|
|
var m = this._transformMatrix;
|
|
var a = m[0], b = m[1], c = m[2], d = m[3], e = m[4], f = m[5];
|
|
|
|
var ad_bc = a * d - b * c;
|
|
var bc_ad = b * c - a * d;
|
|
|
|
return [
|
|
d / ad_bc,
|
|
b / bc_ad,
|
|
c / bc_ad,
|
|
a / ad_bc,
|
|
(d * e - c * f) / bc_ad,
|
|
(b * e - a * f) / ad_bc
|
|
];
|
|
}
|
|
});
|
|
|
|
ctx.save = function ctxSave() {
|
|
var old = this._transformMatrix;
|
|
this._transformStack.push(old);
|
|
this._transformMatrix = old.slice(0, 6);
|
|
|
|
this._originalSave();
|
|
};
|
|
|
|
ctx.restore = function ctxRestore() {
|
|
var prev = this._transformStack.pop();
|
|
if (prev) {
|
|
this._transformMatrix = prev;
|
|
this._originalRestore();
|
|
}
|
|
};
|
|
|
|
ctx.translate = function ctxTranslate(x, y) {
|
|
var m = this._transformMatrix;
|
|
m[4] = m[0] * x + m[2] * y + m[4];
|
|
m[5] = m[1] * x + m[3] * y + m[5];
|
|
|
|
this._originalTranslate(x, y);
|
|
};
|
|
|
|
ctx.scale = function ctxScale(x, y) {
|
|
var m = this._transformMatrix;
|
|
m[0] = m[0] * x;
|
|
m[1] = m[1] * x;
|
|
m[2] = m[2] * y;
|
|
m[3] = m[3] * y;
|
|
|
|
this._originalScale(x, y);
|
|
};
|
|
|
|
ctx.transform = function ctxTransform(a, b, c, d, e, f) {
|
|
var m = this._transformMatrix;
|
|
this._transformMatrix = [
|
|
m[0] * a + m[2] * b,
|
|
m[1] * a + m[3] * b,
|
|
m[0] * c + m[2] * d,
|
|
m[1] * c + m[3] * d,
|
|
m[0] * e + m[2] * f + m[4],
|
|
m[1] * e + m[3] * f + m[5]
|
|
];
|
|
|
|
ctx._originalTransform(a, b, c, d, e, f);
|
|
};
|
|
|
|
ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) {
|
|
this._transformMatrix = [a, b, c, d, e, f];
|
|
|
|
ctx._originalSetTransform(a, b, c, d, e, f);
|
|
};
|
|
|
|
ctx.rotate = function ctxRotate(angle) {
|
|
var cosValue = Math.cos(angle);
|
|
var sinValue = Math.sin(angle);
|
|
|
|
var m = this._transformMatrix;
|
|
this._transformMatrix = [
|
|
m[0] * cosValue + m[2] * sinValue,
|
|
m[1] * cosValue + m[3] * sinValue,
|
|
m[0] * (-sinValue) + m[2] * cosValue,
|
|
m[1] * (-sinValue) + m[3] * cosValue,
|
|
m[4],
|
|
m[5]
|
|
];
|
|
|
|
this._originalRotate(angle);
|
|
};
|
|
}
|
|
}
|
|
|
|
var CachedCanvases = (function CachedCanvasesClosure() {
|
|
var cache = {};
|
|
return {
|
|
getCanvas: function CachedCanvases_getCanvas(id, width, height,
|
|
trackTransform) {
|
|
var canvasEntry;
|
|
if (cache[id] !== undefined) {
|
|
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 () {
|
|
for (var id in cache) {
|
|
var canvasEntry = cache[id];
|
|
// Zeroing the width and height causes Firefox to release graphics
|
|
// resources immediately, which can greatly reduce memory consumption.
|
|
canvasEntry.canvas.width = 0;
|
|
canvasEntry.canvas.height = 0;
|
|
delete cache[id];
|
|
}
|
|
}
|
|
};
|
|
})();
|
|
|
|
function compileType3Glyph(imgData) {
|
|
var POINT_TO_PROCESS_LIMIT = 1000;
|
|
|
|
var width = imgData.width, height = imgData.height;
|
|
var i, j, j0, width1 = width + 1;
|
|
var points = new Uint8Array(width1 * (height + 1));
|
|
var POINT_TYPES =
|
|
new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]);
|
|
|
|
// decodes bit-packed mask data
|
|
var lineSize = (width + 7) & ~7, data0 = imgData.data;
|
|
var data = new Uint8Array(lineSize * height), pos = 0, ii;
|
|
for (i = 0, ii = data0.length; i < ii; i++) {
|
|
var mask = 128, elem = data0[i];
|
|
while (mask > 0) {
|
|
data[pos++] = (elem & mask) ? 0 : 255;
|
|
mask >>= 1;
|
|
}
|
|
}
|
|
|
|
// finding iteresting points: every point is located between mask pixels,
|
|
// so there will be points of the (width + 1)x(height + 1) grid. Every point
|
|
// will have flags assigned based on neighboring mask pixels:
|
|
// 4 | 8
|
|
// --P--
|
|
// 2 | 1
|
|
// We are interested only in points with the flags:
|
|
// - outside corners: 1, 2, 4, 8;
|
|
// - inside corners: 7, 11, 13, 14;
|
|
// - and, intersections: 5, 10.
|
|
var count = 0;
|
|
pos = 0;
|
|
if (data[pos] !== 0) {
|
|
points[0] = 1;
|
|
++count;
|
|
}
|
|
for (j = 1; j < width; j++) {
|
|
if (data[pos] !== data[pos + 1]) {
|
|
points[j] = data[pos] ? 2 : 1;
|
|
++count;
|
|
}
|
|
pos++;
|
|
}
|
|
if (data[pos] !== 0) {
|
|
points[j] = 2;
|
|
++count;
|
|
}
|
|
for (i = 1; i < height; i++) {
|
|
pos = i * lineSize;
|
|
j0 = i * width1;
|
|
if (data[pos - lineSize] !== data[pos]) {
|
|
points[j0] = data[pos] ? 1 : 8;
|
|
++count;
|
|
}
|
|
// 'sum' is the position of the current pixel configuration in the 'TYPES'
|
|
// array (in order 8-1-2-4, so we can use '>>2' to shift the column).
|
|
var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0);
|
|
for (j = 1; j < width; j++) {
|
|
sum = (sum >> 2) + (data[pos + 1] ? 4 : 0) +
|
|
(data[pos - lineSize + 1] ? 8 : 0);
|
|
if (POINT_TYPES[sum]) {
|
|
points[j0 + j] = POINT_TYPES[sum];
|
|
++count;
|
|
}
|
|
pos++;
|
|
}
|
|
if (data[pos - lineSize] !== data[pos]) {
|
|
points[j0 + j] = data[pos] ? 2 : 4;
|
|
++count;
|
|
}
|
|
|
|
if (count > POINT_TO_PROCESS_LIMIT) {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
pos = lineSize * (height - 1);
|
|
j0 = i * width1;
|
|
if (data[pos] !== 0) {
|
|
points[j0] = 8;
|
|
++count;
|
|
}
|
|
for (j = 1; j < width; j++) {
|
|
if (data[pos] !== data[pos + 1]) {
|
|
points[j0 + j] = data[pos] ? 4 : 8;
|
|
++count;
|
|
}
|
|
pos++;
|
|
}
|
|
if (data[pos] !== 0) {
|
|
points[j0 + j] = 4;
|
|
++count;
|
|
}
|
|
if (count > POINT_TO_PROCESS_LIMIT) {
|
|
return null;
|
|
}
|
|
|
|
// building outlines
|
|
var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]);
|
|
var outlines = [];
|
|
for (i = 0; count && i <= height; i++) {
|
|
var p = i * width1;
|
|
var end = p + width;
|
|
while (p < end && !points[p]) {
|
|
p++;
|
|
}
|
|
if (p === end) {
|
|
continue;
|
|
}
|
|
var coords = [p % width1, i];
|
|
|
|
var type = points[p], p0 = p, pp;
|
|
do {
|
|
var step = steps[type];
|
|
do {
|
|
p += step;
|
|
} while (!points[p]);
|
|
|
|
pp = points[p];
|
|
if (pp !== 5 && pp !== 10) {
|
|
// set new direction
|
|
type = pp;
|
|
// delete mark
|
|
points[p] = 0;
|
|
} else { // type is 5 or 10, ie, a crossing
|
|
// set new direction
|
|
type = pp & ((0x33 * type) >> 4);
|
|
// set new type for "future hit"
|
|
points[p] &= (type >> 2 | type << 2);
|
|
}
|
|
|
|
coords.push(p % width1);
|
|
coords.push((p / width1) | 0);
|
|
--count;
|
|
} while (p0 !== p);
|
|
outlines.push(coords);
|
|
--i;
|
|
}
|
|
|
|
var drawOutline = function(c) {
|
|
c.save();
|
|
// the path shall be painted in [0..1]x[0..1] space
|
|
c.scale(1 / width, -1 / height);
|
|
c.translate(0, -height);
|
|
c.beginPath();
|
|
for (var i = 0, ii = outlines.length; i < ii; i++) {
|
|
var o = outlines[i];
|
|
c.moveTo(o[0], o[1]);
|
|
for (var j = 2, jj = o.length; j < jj; j += 2) {
|
|
c.lineTo(o[j], o[j+1]);
|
|
}
|
|
}
|
|
c.fill();
|
|
c.beginPath();
|
|
c.restore();
|
|
};
|
|
|
|
return drawOutline;
|
|
}
|
|
|
|
var CanvasExtraState = (function CanvasExtraStateClosure() {
|
|
function CanvasExtraState(old) {
|
|
// Are soft masks and alpha values shapes or opacities?
|
|
this.alphaIsShape = false;
|
|
this.fontSize = 0;
|
|
this.fontSizeScale = 1;
|
|
this.textMatrix = IDENTITY_MATRIX;
|
|
this.textMatrixScale = 1;
|
|
this.fontMatrix = FONT_IDENTITY_MATRIX;
|
|
this.leading = 0;
|
|
// Current point (in user coordinates)
|
|
this.x = 0;
|
|
this.y = 0;
|
|
// Start of text line (in text coordinates)
|
|
this.lineX = 0;
|
|
this.lineY = 0;
|
|
// Character and word spacing
|
|
this.charSpacing = 0;
|
|
this.wordSpacing = 0;
|
|
this.textHScale = 1;
|
|
this.textRenderingMode = TextRenderingMode.FILL;
|
|
this.textRise = 0;
|
|
// Default fore and background colors
|
|
this.fillColor = '#000000';
|
|
this.strokeColor = '#000000';
|
|
this.patternFill = false;
|
|
// Note: fill alpha applies to all non-stroking operations
|
|
this.fillAlpha = 1;
|
|
this.strokeAlpha = 1;
|
|
this.lineWidth = 1;
|
|
this.activeSMask = null; // nonclonable field (see the save method below)
|
|
|
|
this.old = old;
|
|
}
|
|
|
|
CanvasExtraState.prototype = {
|
|
clone: function CanvasExtraState_clone() {
|
|
return Object.create(this);
|
|
},
|
|
setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) {
|
|
this.x = x;
|
|
this.y = y;
|
|
}
|
|
};
|
|
return CanvasExtraState;
|
|
})();
|
|
|
|
var CanvasGraphics = (function CanvasGraphicsClosure() {
|
|
// Defines the time the executeOperatorList is going to be executing
|
|
// before it stops and shedules a continue of execution.
|
|
var EXECUTION_TIME = 15;
|
|
// Defines the number of steps before checking the execution time
|
|
var EXECUTION_STEPS = 10;
|
|
|
|
function CanvasGraphics(canvasCtx, commonObjs, objs, imageLayer) {
|
|
this.ctx = canvasCtx;
|
|
this.current = new CanvasExtraState();
|
|
this.stateStack = [];
|
|
this.pendingClip = null;
|
|
this.pendingEOFill = false;
|
|
this.res = null;
|
|
this.xobjs = null;
|
|
this.commonObjs = commonObjs;
|
|
this.objs = objs;
|
|
this.imageLayer = imageLayer;
|
|
this.groupStack = [];
|
|
this.processingType3 = null;
|
|
// Patterns are painted relative to the initial page/form transform, see pdf
|
|
// spec 8.7.2 NOTE 1.
|
|
this.baseTransform = null;
|
|
this.baseTransformStack = [];
|
|
this.groupLevel = 0;
|
|
this.smaskStack = [];
|
|
this.smaskCounter = 0;
|
|
this.tempSMask = null;
|
|
if (canvasCtx) {
|
|
// NOTE: if mozCurrentTransform is polyfilled, then the current state of
|
|
// the transformation must already be set in canvasCtx._transformMatrix.
|
|
addContextCurrentTransform(canvasCtx);
|
|
}
|
|
this.cachedGetSinglePixelWidth = null;
|
|
}
|
|
|
|
function putBinaryImageData(ctx, imgData) {
|
|
if (typeof ImageData !== 'undefined' && imgData instanceof ImageData) {
|
|
ctx.putImageData(imgData, 0, 0);
|
|
return;
|
|
}
|
|
|
|
// Put the image data to the canvas in chunks, rather than putting the
|
|
// whole image at once. This saves JS memory, because the ImageData object
|
|
// is smaller. It also possibly saves C++ memory within the implementation
|
|
// of putImageData(). (E.g. in Firefox we make two short-lived copies of
|
|
// the data passed to putImageData()). |n| shouldn't be too small, however,
|
|
// because too many putImageData() calls will slow things down.
|
|
//
|
|
// Note: as written, if the last chunk is partial, the putImageData() call
|
|
// will (conceptually) put pixels past the bounds of the canvas. But
|
|
// that's ok; any such pixels are ignored.
|
|
|
|
var height = imgData.height, width = imgData.width;
|
|
var partialChunkHeight = height % FULL_CHUNK_HEIGHT;
|
|
var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;
|
|
var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;
|
|
|
|
var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);
|
|
var srcPos = 0, destPos;
|
|
var src = imgData.data;
|
|
var dest = chunkImgData.data;
|
|
var i, j, thisChunkHeight, elemsInThisChunk;
|
|
|
|
// There are multiple forms in which the pixel data can be passed, and
|
|
// imgData.kind tells us which one this is.
|
|
if (imgData.kind === ImageKind.GRAYSCALE_1BPP) {
|
|
// Grayscale, 1 bit per pixel (i.e. black-and-white).
|
|
var srcLength = src.byteLength;
|
|
var dest32 = PDFJS.hasCanvasTypedArrays ? new Uint32Array(dest.buffer) :
|
|
new Uint32ArrayView(dest);
|
|
var dest32DataLength = dest32.length;
|
|
var fullSrcDiff = (width + 7) >> 3;
|
|
var white = 0xFFFFFFFF;
|
|
var black = (PDFJS.isLittleEndian || !PDFJS.hasCanvasTypedArrays) ?
|
|
0xFF000000 : 0x000000FF;
|
|
for (i = 0; i < totalChunks; i++) {
|
|
thisChunkHeight =
|
|
(i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight;
|
|
destPos = 0;
|
|
for (j = 0; j < thisChunkHeight; j++) {
|
|
var srcDiff = srcLength - srcPos;
|
|
var k = 0;
|
|
var kEnd = (srcDiff > fullSrcDiff) ? width : srcDiff * 8 - 7;
|
|
var kEndUnrolled = kEnd & ~7;
|
|
var mask = 0;
|
|
var srcByte = 0;
|
|
for (; k < kEndUnrolled; k += 8) {
|
|
srcByte = src[srcPos++];
|
|
dest32[destPos++] = (srcByte & 128) ? white : black;
|
|
dest32[destPos++] = (srcByte & 64) ? white : black;
|
|
dest32[destPos++] = (srcByte & 32) ? white : black;
|
|
dest32[destPos++] = (srcByte & 16) ? white : black;
|
|
dest32[destPos++] = (srcByte & 8) ? white : black;
|
|
dest32[destPos++] = (srcByte & 4) ? white : black;
|
|
dest32[destPos++] = (srcByte & 2) ? white : black;
|
|
dest32[destPos++] = (srcByte & 1) ? white : black;
|
|
}
|
|
for (; k < kEnd; k++) {
|
|
if (mask === 0) {
|
|
srcByte = src[srcPos++];
|
|
mask = 128;
|
|
}
|
|
|
|
dest32[destPos++] = (srcByte & mask) ? white : black;
|
|
mask >>= 1;
|
|
}
|
|
}
|
|
// We ran out of input. Make all remaining pixels transparent.
|
|
while (destPos < dest32DataLength) {
|
|
dest32[destPos++] = 0;
|
|
}
|
|
|
|
ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
|
|
}
|
|
} else if (imgData.kind === ImageKind.RGBA_32BPP) {
|
|
// RGBA, 32-bits per pixel.
|
|
|
|
j = 0;
|
|
elemsInThisChunk = width * FULL_CHUNK_HEIGHT * 4;
|
|
for (i = 0; i < fullChunks; i++) {
|
|
dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));
|
|
srcPos += elemsInThisChunk;
|
|
|
|
ctx.putImageData(chunkImgData, 0, j);
|
|
j += FULL_CHUNK_HEIGHT;
|
|
}
|
|
if (i < totalChunks) {
|
|
elemsInThisChunk = width * partialChunkHeight * 4;
|
|
dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));
|
|
ctx.putImageData(chunkImgData, 0, j);
|
|
}
|
|
|
|
} else if (imgData.kind === ImageKind.RGB_24BPP) {
|
|
// RGB, 24-bits per pixel.
|
|
thisChunkHeight = FULL_CHUNK_HEIGHT;
|
|
elemsInThisChunk = width * thisChunkHeight;
|
|
for (i = 0; i < totalChunks; i++) {
|
|
if (i >= fullChunks) {
|
|
thisChunkHeight = partialChunkHeight;
|
|
elemsInThisChunk = width * thisChunkHeight;
|
|
}
|
|
|
|
destPos = 0;
|
|
for (j = elemsInThisChunk; j--;) {
|
|
dest[destPos++] = src[srcPos++];
|
|
dest[destPos++] = src[srcPos++];
|
|
dest[destPos++] = src[srcPos++];
|
|
dest[destPos++] = 255;
|
|
}
|
|
ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
|
|
}
|
|
} else {
|
|
error('bad image kind: ' + imgData.kind);
|
|
}
|
|
}
|
|
|
|
function putBinaryImageMask(ctx, imgData) {
|
|
var height = imgData.height, width = imgData.width;
|
|
var partialChunkHeight = height % FULL_CHUNK_HEIGHT;
|
|
var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;
|
|
var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;
|
|
|
|
var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);
|
|
var srcPos = 0;
|
|
var src = imgData.data;
|
|
var dest = chunkImgData.data;
|
|
|
|
for (var i = 0; i < totalChunks; i++) {
|
|
var thisChunkHeight =
|
|
(i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight;
|
|
|
|
// Expand the mask so it can be used by the canvas. Any required
|
|
// inversion has already been handled.
|
|
var destPos = 3; // alpha component offset
|
|
for (var j = 0; j < thisChunkHeight; j++) {
|
|
var mask = 0;
|
|
for (var k = 0; k < width; k++) {
|
|
if (!mask) {
|
|
var elem = src[srcPos++];
|
|
mask = 128;
|
|
}
|
|
dest[destPos] = (elem & mask) ? 0 : 255;
|
|
destPos += 4;
|
|
mask >>= 1;
|
|
}
|
|
}
|
|
ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
|
|
}
|
|
}
|
|
|
|
function copyCtxState(sourceCtx, destCtx) {
|
|
var properties = ['strokeStyle', 'fillStyle', 'fillRule', 'globalAlpha',
|
|
'lineWidth', 'lineCap', 'lineJoin', 'miterLimit',
|
|
'globalCompositeOperation', 'font'];
|
|
for (var i = 0, ii = properties.length; i < ii; i++) {
|
|
var property = properties[i];
|
|
if (sourceCtx[property] !== undefined) {
|
|
destCtx[property] = sourceCtx[property];
|
|
}
|
|
}
|
|
if (sourceCtx.setLineDash !== undefined) {
|
|
destCtx.setLineDash(sourceCtx.getLineDash());
|
|
destCtx.lineDashOffset = sourceCtx.lineDashOffset;
|
|
} else if (sourceCtx.mozDashOffset !== undefined) {
|
|
destCtx.mozDash = sourceCtx.mozDash;
|
|
destCtx.mozDashOffset = sourceCtx.mozDashOffset;
|
|
}
|
|
}
|
|
|
|
function composeSMaskBackdrop(bytes, r0, g0, b0) {
|
|
var length = bytes.length;
|
|
for (var i = 3; i < length; i += 4) {
|
|
var alpha = bytes[i];
|
|
if (alpha === 0) {
|
|
bytes[i - 3] = r0;
|
|
bytes[i - 2] = g0;
|
|
bytes[i - 1] = b0;
|
|
} else if (alpha < 255) {
|
|
var alpha_ = 255 - alpha;
|
|
bytes[i - 3] = (bytes[i - 3] * alpha + r0 * alpha_) >> 8;
|
|
bytes[i - 2] = (bytes[i - 2] * alpha + g0 * alpha_) >> 8;
|
|
bytes[i - 1] = (bytes[i - 1] * alpha + b0 * alpha_) >> 8;
|
|
}
|
|
}
|
|
}
|
|
|
|
function composeSMaskAlpha(maskData, layerData) {
|
|
var length = maskData.length;
|
|
var scale = 1 / 255;
|
|
for (var i = 3; i < length; i += 4) {
|
|
var alpha = maskData[i];
|
|
layerData[i] = (layerData[i] * alpha * scale) | 0;
|
|
}
|
|
}
|
|
|
|
function composeSMaskLuminosity(maskData, layerData) {
|
|
var length = maskData.length;
|
|
for (var i = 3; i < length; i += 4) {
|
|
var y = (maskData[i - 3] * 77) + // * 0.3 / 255 * 0x10000
|
|
(maskData[i - 2] * 152) + // * 0.59 ....
|
|
(maskData[i - 1] * 28); // * 0.11 ....
|
|
layerData[i] = (layerData[i] * y) >> 16;
|
|
}
|
|
}
|
|
|
|
function genericComposeSMask(maskCtx, layerCtx, width, height,
|
|
subtype, backdrop) {
|
|
var hasBackdrop = !!backdrop;
|
|
var r0 = hasBackdrop ? backdrop[0] : 0;
|
|
var g0 = hasBackdrop ? backdrop[1] : 0;
|
|
var b0 = hasBackdrop ? backdrop[2] : 0;
|
|
|
|
var composeFn;
|
|
if (subtype === 'Luminosity') {
|
|
composeFn = composeSMaskLuminosity;
|
|
} else {
|
|
composeFn = composeSMaskAlpha;
|
|
}
|
|
|
|
// processing image in chunks to save memory
|
|
var PIXELS_TO_PROCESS = 1048576;
|
|
var chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width));
|
|
for (var row = 0; row < height; row += chunkSize) {
|
|
var chunkHeight = Math.min(chunkSize, height - row);
|
|
var maskData = maskCtx.getImageData(0, row, width, chunkHeight);
|
|
var layerData = layerCtx.getImageData(0, row, width, chunkHeight);
|
|
|
|
if (hasBackdrop) {
|
|
composeSMaskBackdrop(maskData.data, r0, g0, b0);
|
|
}
|
|
composeFn(maskData.data, layerData.data);
|
|
|
|
maskCtx.putImageData(layerData, 0, row);
|
|
}
|
|
}
|
|
|
|
function composeSMask(ctx, smask, layerCtx) {
|
|
var mask = smask.canvas;
|
|
var maskCtx = smask.context;
|
|
|
|
ctx.setTransform(smask.scaleX, 0, 0, smask.scaleY,
|
|
smask.offsetX, smask.offsetY);
|
|
|
|
var backdrop = smask.backdrop || null;
|
|
if (WebGLUtils.isEnabled) {
|
|
var composed = WebGLUtils.composeSMask(layerCtx.canvas, mask,
|
|
{subtype: smask.subtype, backdrop: backdrop});
|
|
ctx.setTransform(1, 0, 0, 1, 0, 0);
|
|
ctx.drawImage(composed, smask.offsetX, smask.offsetY);
|
|
return;
|
|
}
|
|
genericComposeSMask(maskCtx, layerCtx, mask.width, mask.height,
|
|
smask.subtype, backdrop);
|
|
ctx.drawImage(mask, 0, 0);
|
|
}
|
|
|
|
var LINE_CAP_STYLES = ['butt', 'round', 'square'];
|
|
var LINE_JOIN_STYLES = ['miter', 'round', 'bevel'];
|
|
var NORMAL_CLIP = {};
|
|
var EO_CLIP = {};
|
|
|
|
CanvasGraphics.prototype = {
|
|
|
|
beginDrawing: function CanvasGraphics_beginDrawing(viewport, transparency) {
|
|
// For pdfs that use blend modes we have to clear the canvas else certain
|
|
// blend modes can look wrong since we'd be blending with a white
|
|
// backdrop. The problem with a transparent backdrop though is we then
|
|
// don't get sub pixel anti aliasing on text, so we fill with white if
|
|
// we can.
|
|
var width = this.ctx.canvas.width;
|
|
var height = this.ctx.canvas.height;
|
|
if (transparency) {
|
|
this.ctx.clearRect(0, 0, width, height);
|
|
} else {
|
|
this.ctx.mozOpaque = true;
|
|
this.ctx.save();
|
|
this.ctx.fillStyle = 'rgb(255, 255, 255)';
|
|
this.ctx.fillRect(0, 0, width, height);
|
|
this.ctx.restore();
|
|
}
|
|
|
|
var transform = viewport.transform;
|
|
|
|
this.ctx.save();
|
|
this.ctx.transform.apply(this.ctx, transform);
|
|
|
|
this.baseTransform = this.ctx.mozCurrentTransform.slice();
|
|
|
|
if (this.imageLayer) {
|
|
this.imageLayer.beginLayout();
|
|
}
|
|
},
|
|
|
|
executeOperatorList: function CanvasGraphics_executeOperatorList(
|
|
operatorList,
|
|
executionStartIdx, continueCallback,
|
|
stepper) {
|
|
var argsArray = operatorList.argsArray;
|
|
var fnArray = operatorList.fnArray;
|
|
var i = executionStartIdx || 0;
|
|
var argsArrayLen = argsArray.length;
|
|
|
|
// Sometimes the OperatorList to execute is empty.
|
|
if (argsArrayLen === i) {
|
|
return i;
|
|
}
|
|
|
|
var chunkOperations = (argsArrayLen - i > EXECUTION_STEPS &&
|
|
typeof continueCallback === 'function');
|
|
var endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0;
|
|
var steps = 0;
|
|
|
|
var commonObjs = this.commonObjs;
|
|
var objs = this.objs;
|
|
var fnId;
|
|
|
|
while (true) {
|
|
if (stepper !== undefined && i === stepper.nextBreakPoint) {
|
|
stepper.breakIt(i, continueCallback);
|
|
return i;
|
|
}
|
|
|
|
fnId = fnArray[i];
|
|
|
|
if (fnId !== OPS.dependency) {
|
|
this[fnId].apply(this, argsArray[i]);
|
|
} else {
|
|
var deps = argsArray[i];
|
|
for (var n = 0, nn = deps.length; n < nn; n++) {
|
|
var depObjId = deps[n];
|
|
var common = depObjId[0] === 'g' && depObjId[1] === '_';
|
|
var objsPool = common ? commonObjs : objs;
|
|
|
|
// If the promise isn't resolved yet, add the continueCallback
|
|
// to the promise and bail out.
|
|
if (!objsPool.isResolved(depObjId)) {
|
|
objsPool.get(depObjId, continueCallback);
|
|
return i;
|
|
}
|
|
}
|
|
}
|
|
|
|
i++;
|
|
|
|
// If the entire operatorList was executed, stop as were done.
|
|
if (i === argsArrayLen) {
|
|
return i;
|
|
}
|
|
|
|
// If the execution took longer then a certain amount of time and
|
|
// `continueCallback` is specified, interrupt the execution.
|
|
if (chunkOperations && ++steps > EXECUTION_STEPS) {
|
|
if (Date.now() > endTime) {
|
|
continueCallback();
|
|
return i;
|
|
}
|
|
steps = 0;
|
|
}
|
|
|
|
// If the operatorList isn't executed completely yet OR the execution
|
|
// time was short enough, do another execution round.
|
|
}
|
|
},
|
|
|
|
endDrawing: function CanvasGraphics_endDrawing() {
|
|
this.ctx.restore();
|
|
CachedCanvases.clear();
|
|
WebGLUtils.clear();
|
|
|
|
if (this.imageLayer) {
|
|
this.imageLayer.endLayout();
|
|
}
|
|
},
|
|
|
|
// Graphics state
|
|
setLineWidth: function CanvasGraphics_setLineWidth(width) {
|
|
this.current.lineWidth = width;
|
|
this.ctx.lineWidth = width;
|
|
},
|
|
setLineCap: function CanvasGraphics_setLineCap(style) {
|
|
this.ctx.lineCap = LINE_CAP_STYLES[style];
|
|
},
|
|
setLineJoin: function CanvasGraphics_setLineJoin(style) {
|
|
this.ctx.lineJoin = LINE_JOIN_STYLES[style];
|
|
},
|
|
setMiterLimit: function CanvasGraphics_setMiterLimit(limit) {
|
|
this.ctx.miterLimit = limit;
|
|
},
|
|
setDash: function CanvasGraphics_setDash(dashArray, dashPhase) {
|
|
var ctx = this.ctx;
|
|
if (ctx.setLineDash !== undefined) {
|
|
ctx.setLineDash(dashArray);
|
|
ctx.lineDashOffset = dashPhase;
|
|
} else {
|
|
ctx.mozDash = dashArray;
|
|
ctx.mozDashOffset = dashPhase;
|
|
}
|
|
},
|
|
setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) {
|
|
// Maybe if we one day fully support color spaces this will be important
|
|
// for now we can ignore.
|
|
// TODO set rendering intent?
|
|
},
|
|
setFlatness: function CanvasGraphics_setFlatness(flatness) {
|
|
// There's no way to control this with canvas, but we can safely ignore.
|
|
// TODO set flatness?
|
|
},
|
|
setGState: function CanvasGraphics_setGState(states) {
|
|
for (var i = 0, ii = states.length; i < ii; i++) {
|
|
var state = states[i];
|
|
var key = state[0];
|
|
var value = state[1];
|
|
|
|
switch (key) {
|
|
case 'LW':
|
|
this.setLineWidth(value);
|
|
break;
|
|
case 'LC':
|
|
this.setLineCap(value);
|
|
break;
|
|
case 'LJ':
|
|
this.setLineJoin(value);
|
|
break;
|
|
case 'ML':
|
|
this.setMiterLimit(value);
|
|
break;
|
|
case 'D':
|
|
this.setDash(value[0], value[1]);
|
|
break;
|
|
case 'RI':
|
|
this.setRenderingIntent(value);
|
|
break;
|
|
case 'FL':
|
|
this.setFlatness(value);
|
|
break;
|
|
case 'Font':
|
|
this.setFont(value[0], value[1]);
|
|
break;
|
|
case 'CA':
|
|
this.current.strokeAlpha = state[1];
|
|
break;
|
|
case 'ca':
|
|
this.current.fillAlpha = state[1];
|
|
this.ctx.globalAlpha = state[1];
|
|
break;
|
|
case 'BM':
|
|
if (value && value.name && (value.name !== 'Normal')) {
|
|
var mode = value.name.replace(/([A-Z])/g,
|
|
function(c) {
|
|
return '-' + c.toLowerCase();
|
|
}
|
|
).substring(1);
|
|
this.ctx.globalCompositeOperation = mode;
|
|
if (this.ctx.globalCompositeOperation !== mode) {
|
|
warn('globalCompositeOperation "' + mode +
|
|
'" is not supported');
|
|
}
|
|
} else {
|
|
this.ctx.globalCompositeOperation = 'source-over';
|
|
}
|
|
break;
|
|
case 'SMask':
|
|
if (this.current.activeSMask) {
|
|
this.endSMaskGroup();
|
|
}
|
|
this.current.activeSMask = value ? this.tempSMask : null;
|
|
if (this.current.activeSMask) {
|
|
this.beginSMaskGroup();
|
|
}
|
|
this.tempSMask = null;
|
|
break;
|
|
}
|
|
}
|
|
},
|
|
beginSMaskGroup: function CanvasGraphics_beginSMaskGroup() {
|
|
|
|
var activeSMask = this.current.activeSMask;
|
|
var drawnWidth = activeSMask.canvas.width;
|
|
var drawnHeight = activeSMask.canvas.height;
|
|
var cacheId = 'smaskGroupAt' + this.groupLevel;
|
|
var scratchCanvas = CachedCanvases.getCanvas(
|
|
cacheId, drawnWidth, drawnHeight, true);
|
|
|
|
var currentCtx = this.ctx;
|
|
var currentTransform = currentCtx.mozCurrentTransform;
|
|
this.ctx.save();
|
|
|
|
var groupCtx = scratchCanvas.context;
|
|
groupCtx.scale(1 / activeSMask.scaleX, 1 / activeSMask.scaleY);
|
|
groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY);
|
|
groupCtx.transform.apply(groupCtx, currentTransform);
|
|
|
|
copyCtxState(currentCtx, groupCtx);
|
|
this.ctx = groupCtx;
|
|
this.setGState([
|
|
['BM', 'Normal'],
|
|
['ca', 1],
|
|
['CA', 1]
|
|
]);
|
|
this.groupStack.push(currentCtx);
|
|
this.groupLevel++;
|
|
},
|
|
endSMaskGroup: function CanvasGraphics_endSMaskGroup() {
|
|
var groupCtx = this.ctx;
|
|
this.groupLevel--;
|
|
this.ctx = this.groupStack.pop();
|
|
|
|
composeSMask(this.ctx, this.current.activeSMask, groupCtx);
|
|
this.ctx.restore();
|
|
},
|
|
save: function CanvasGraphics_save() {
|
|
this.ctx.save();
|
|
var old = this.current;
|
|
this.stateStack.push(old);
|
|
this.current = old.clone();
|
|
this.current.activeSMask = null;
|
|
},
|
|
restore: function CanvasGraphics_restore() {
|
|
if (this.stateStack.length !== 0) {
|
|
if (this.current.activeSMask !== null) {
|
|
this.endSMaskGroup();
|
|
}
|
|
|
|
this.current = this.stateStack.pop();
|
|
this.ctx.restore();
|
|
|
|
this.cachedGetSinglePixelWidth = null;
|
|
}
|
|
},
|
|
transform: function CanvasGraphics_transform(a, b, c, d, e, f) {
|
|
this.ctx.transform(a, b, c, d, e, f);
|
|
|
|
this.cachedGetSinglePixelWidth = null;
|
|
},
|
|
|
|
// Path
|
|
constructPath: function CanvasGraphics_constructPath(ops, args) {
|
|
var ctx = this.ctx;
|
|
var current = this.current;
|
|
var x = current.x, y = current.y;
|
|
for (var i = 0, j = 0, ii = ops.length; i < ii; i++) {
|
|
switch (ops[i] | 0) {
|
|
case OPS.rectangle:
|
|
x = args[j++];
|
|
y = args[j++];
|
|
var width = args[j++];
|
|
var height = args[j++];
|
|
if (width === 0) {
|
|
width = this.getSinglePixelWidth();
|
|
}
|
|
if (height === 0) {
|
|
height = this.getSinglePixelWidth();
|
|
}
|
|
var xw = x + width;
|
|
var yh = y + height;
|
|
this.ctx.moveTo(x, y);
|
|
this.ctx.lineTo(xw, y);
|
|
this.ctx.lineTo(xw, yh);
|
|
this.ctx.lineTo(x, yh);
|
|
this.ctx.lineTo(x, y);
|
|
this.ctx.closePath();
|
|
break;
|
|
case OPS.moveTo:
|
|
x = args[j++];
|
|
y = args[j++];
|
|
ctx.moveTo(x, y);
|
|
break;
|
|
case OPS.lineTo:
|
|
x = args[j++];
|
|
y = args[j++];
|
|
ctx.lineTo(x, y);
|
|
break;
|
|
case OPS.curveTo:
|
|
x = args[j + 4];
|
|
y = args[j + 5];
|
|
ctx.bezierCurveTo(args[j], args[j + 1], args[j + 2], args[j + 3],
|
|
x, y);
|
|
j += 6;
|
|
break;
|
|
case OPS.curveTo2:
|
|
ctx.bezierCurveTo(x, y, args[j], args[j + 1],
|
|
args[j + 2], args[j + 3]);
|
|
x = args[j + 2];
|
|
y = args[j + 3];
|
|
j += 4;
|
|
break;
|
|
case OPS.curveTo3:
|
|
x = args[j + 2];
|
|
y = args[j + 3];
|
|
ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y);
|
|
j += 4;
|
|
break;
|
|
case OPS.closePath:
|
|
ctx.closePath();
|
|
break;
|
|
}
|
|
}
|
|
current.setCurrentPoint(x, y);
|
|
},
|
|
closePath: function CanvasGraphics_closePath() {
|
|
this.ctx.closePath();
|
|
},
|
|
stroke: function CanvasGraphics_stroke(consumePath) {
|
|
consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
|
|
var ctx = this.ctx;
|
|
var strokeColor = this.current.strokeColor;
|
|
// Prevent drawing too thin lines by enforcing a minimum line width.
|
|
ctx.lineWidth = Math.max(this.getSinglePixelWidth() * MIN_WIDTH_FACTOR,
|
|
this.current.lineWidth);
|
|
// For stroke we want to temporarily change the global alpha to the
|
|
// stroking alpha.
|
|
ctx.globalAlpha = this.current.strokeAlpha;
|
|
if (strokeColor && strokeColor.hasOwnProperty('type') &&
|
|
strokeColor.type === 'Pattern') {
|
|
// for patterns, we transform to pattern space, calculate
|
|
// the pattern, call stroke, and restore to user space
|
|
ctx.save();
|
|
ctx.strokeStyle = strokeColor.getPattern(ctx, this);
|
|
ctx.stroke();
|
|
ctx.restore();
|
|
} else {
|
|
ctx.stroke();
|
|
}
|
|
if (consumePath) {
|
|
this.consumePath();
|
|
}
|
|
// Restore the global alpha to the fill alpha
|
|
ctx.globalAlpha = this.current.fillAlpha;
|
|
},
|
|
closeStroke: function CanvasGraphics_closeStroke() {
|
|
this.closePath();
|
|
this.stroke();
|
|
},
|
|
fill: function CanvasGraphics_fill(consumePath) {
|
|
consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
|
|
var ctx = this.ctx;
|
|
var fillColor = this.current.fillColor;
|
|
var isPatternFill = this.current.patternFill;
|
|
var needRestore = false;
|
|
|
|
if (isPatternFill) {
|
|
ctx.save();
|
|
ctx.fillStyle = fillColor.getPattern(ctx, this);
|
|
needRestore = true;
|
|
}
|
|
|
|
if (this.pendingEOFill) {
|
|
if (ctx.mozFillRule !== undefined) {
|
|
ctx.mozFillRule = 'evenodd';
|
|
ctx.fill();
|
|
ctx.mozFillRule = 'nonzero';
|
|
} else {
|
|
try {
|
|
ctx.fill('evenodd');
|
|
} catch (ex) {
|
|
// shouldn't really happen, but browsers might think differently
|
|
ctx.fill();
|
|
}
|
|
}
|
|
this.pendingEOFill = false;
|
|
} else {
|
|
ctx.fill();
|
|
}
|
|
|
|
if (needRestore) {
|
|
ctx.restore();
|
|
}
|
|
if (consumePath) {
|
|
this.consumePath();
|
|
}
|
|
},
|
|
eoFill: function CanvasGraphics_eoFill() {
|
|
this.pendingEOFill = true;
|
|
this.fill();
|
|
},
|
|
fillStroke: function CanvasGraphics_fillStroke() {
|
|
this.fill(false);
|
|
this.stroke(false);
|
|
|
|
this.consumePath();
|
|
},
|
|
eoFillStroke: function CanvasGraphics_eoFillStroke() {
|
|
this.pendingEOFill = true;
|
|
this.fillStroke();
|
|
},
|
|
closeFillStroke: function CanvasGraphics_closeFillStroke() {
|
|
this.closePath();
|
|
this.fillStroke();
|
|
},
|
|
closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() {
|
|
this.pendingEOFill = true;
|
|
this.closePath();
|
|
this.fillStroke();
|
|
},
|
|
endPath: function CanvasGraphics_endPath() {
|
|
this.consumePath();
|
|
},
|
|
|
|
// Clipping
|
|
clip: function CanvasGraphics_clip() {
|
|
this.pendingClip = NORMAL_CLIP;
|
|
},
|
|
eoClip: function CanvasGraphics_eoClip() {
|
|
this.pendingClip = EO_CLIP;
|
|
},
|
|
|
|
// Text
|
|
beginText: function CanvasGraphics_beginText() {
|
|
this.current.textMatrix = IDENTITY_MATRIX;
|
|
this.current.textMatrixScale = 1;
|
|
this.current.x = this.current.lineX = 0;
|
|
this.current.y = this.current.lineY = 0;
|
|
},
|
|
endText: function CanvasGraphics_endText() {
|
|
var paths = this.pendingTextPaths;
|
|
var ctx = this.ctx;
|
|
if (paths === undefined) {
|
|
ctx.beginPath();
|
|
return;
|
|
}
|
|
|
|
ctx.save();
|
|
ctx.beginPath();
|
|
for (var i = 0; i < paths.length; i++) {
|
|
var path = paths[i];
|
|
ctx.setTransform.apply(ctx, path.transform);
|
|
ctx.translate(path.x, path.y);
|
|
path.addToPath(ctx, path.fontSize);
|
|
}
|
|
ctx.restore();
|
|
ctx.clip();
|
|
ctx.beginPath();
|
|
delete this.pendingTextPaths;
|
|
},
|
|
setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) {
|
|
this.current.charSpacing = spacing;
|
|
},
|
|
setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) {
|
|
this.current.wordSpacing = spacing;
|
|
},
|
|
setHScale: function CanvasGraphics_setHScale(scale) {
|
|
this.current.textHScale = scale / 100;
|
|
},
|
|
setLeading: function CanvasGraphics_setLeading(leading) {
|
|
this.current.leading = -leading;
|
|
},
|
|
setFont: function CanvasGraphics_setFont(fontRefName, size) {
|
|
var fontObj = this.commonObjs.get(fontRefName);
|
|
var current = this.current;
|
|
|
|
if (!fontObj) {
|
|
error('Can\'t find font for ' + fontRefName);
|
|
}
|
|
|
|
current.fontMatrix = (fontObj.fontMatrix ?
|
|
fontObj.fontMatrix : FONT_IDENTITY_MATRIX);
|
|
|
|
// A valid matrix needs all main diagonal elements to be non-zero
|
|
// This also ensures we bypass FF bugzilla bug #719844.
|
|
if (current.fontMatrix[0] === 0 ||
|
|
current.fontMatrix[3] === 0) {
|
|
warn('Invalid font matrix for font ' + fontRefName);
|
|
}
|
|
|
|
// The spec for Tf (setFont) says that 'size' specifies the font 'scale',
|
|
// and in some docs this can be negative (inverted x-y axes).
|
|
if (size < 0) {
|
|
size = -size;
|
|
current.fontDirection = -1;
|
|
} else {
|
|
current.fontDirection = 1;
|
|
}
|
|
|
|
this.current.font = fontObj;
|
|
this.current.fontSize = size;
|
|
|
|
if (fontObj.isType3Font) {
|
|
return; // we don't need ctx.font for Type3 fonts
|
|
}
|
|
|
|
var name = fontObj.loadedName || 'sans-serif';
|
|
var bold = fontObj.black ? (fontObj.bold ? '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 ? MIN_FONT_SIZE :
|
|
size > MAX_FONT_SIZE ? MAX_FONT_SIZE : size;
|
|
this.current.fontSizeScale = size / browserFontSize;
|
|
|
|
var rule = italic + ' ' + bold + ' ' + browserFontSize + 'px ' + typeface;
|
|
this.ctx.font = rule;
|
|
},
|
|
setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) {
|
|
this.current.textRenderingMode = mode;
|
|
},
|
|
setTextRise: function CanvasGraphics_setTextRise(rise) {
|
|
this.current.textRise = rise;
|
|
},
|
|
moveText: function CanvasGraphics_moveText(x, y) {
|
|
this.current.x = this.current.lineX += x;
|
|
this.current.y = this.current.lineY += y;
|
|
},
|
|
setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) {
|
|
this.setLeading(-y);
|
|
this.moveText(x, y);
|
|
},
|
|
setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) {
|
|
this.current.textMatrix = [a, b, c, d, e, f];
|
|
this.current.textMatrixScale = Math.sqrt(a * a + b * b);
|
|
|
|
this.current.x = this.current.lineX = 0;
|
|
this.current.y = this.current.lineY = 0;
|
|
},
|
|
nextLine: function CanvasGraphics_nextLine() {
|
|
this.moveText(0, this.current.leading);
|
|
},
|
|
|
|
paintChar: function CanvasGraphics_paintChar(character, x, y) {
|
|
var ctx = this.ctx;
|
|
var current = this.current;
|
|
var font = current.font;
|
|
var textRenderingMode = current.textRenderingMode;
|
|
var fontSize = current.fontSize / current.fontSizeScale;
|
|
var fillStrokeMode = textRenderingMode &
|
|
TextRenderingMode.FILL_STROKE_MASK;
|
|
var isAddToPathSet = !!(textRenderingMode &
|
|
TextRenderingMode.ADD_TO_PATH_FLAG);
|
|
|
|
var addToPath;
|
|
if (font.disableFontFace || isAddToPathSet) {
|
|
addToPath = font.getPathGenerator(this.commonObjs, character);
|
|
}
|
|
|
|
if (font.disableFontFace) {
|
|
ctx.save();
|
|
ctx.translate(x, y);
|
|
ctx.beginPath();
|
|
addToPath(ctx, fontSize);
|
|
if (fillStrokeMode === TextRenderingMode.FILL ||
|
|
fillStrokeMode === TextRenderingMode.FILL_STROKE) {
|
|
ctx.fill();
|
|
}
|
|
if (fillStrokeMode === TextRenderingMode.STROKE ||
|
|
fillStrokeMode === TextRenderingMode.FILL_STROKE) {
|
|
ctx.stroke();
|
|
}
|
|
ctx.restore();
|
|
} else {
|
|
if (fillStrokeMode === TextRenderingMode.FILL ||
|
|
fillStrokeMode === TextRenderingMode.FILL_STROKE) {
|
|
ctx.fillText(character, x, y);
|
|
}
|
|
if (fillStrokeMode === TextRenderingMode.STROKE ||
|
|
fillStrokeMode === TextRenderingMode.FILL_STROKE) {
|
|
ctx.strokeText(character, x, y);
|
|
}
|
|
}
|
|
|
|
if (isAddToPathSet) {
|
|
var paths = this.pendingTextPaths || (this.pendingTextPaths = []);
|
|
paths.push({
|
|
transform: ctx.mozCurrentTransform,
|
|
x: x,
|
|
y: y,
|
|
fontSize: fontSize,
|
|
addToPath: addToPath
|
|
});
|
|
}
|
|
},
|
|
|
|
get isFontSubpixelAAEnabled() {
|
|
// Checks if anti-aliasing is enabled when scaled text is painted.
|
|
// On Windows GDI scaled fonts looks bad.
|
|
var ctx = document.createElement('canvas').getContext('2d');
|
|
ctx.scale(1.5, 1);
|
|
ctx.fillText('I', 0, 10);
|
|
var data = ctx.getImageData(0, 0, 10, 10).data;
|
|
var enabled = false;
|
|
for (var i = 3; i < data.length; i += 4) {
|
|
if (data[i] > 0 && data[i] < 255) {
|
|
enabled = true;
|
|
break;
|
|
}
|
|
}
|
|
return shadow(this, 'isFontSubpixelAAEnabled', enabled);
|
|
},
|
|
|
|
showText: function CanvasGraphics_showText(glyphs) {
|
|
var current = this.current;
|
|
var font = current.font;
|
|
if (font.isType3Font) {
|
|
return this.showType3Text(glyphs);
|
|
}
|
|
|
|
var fontSize = current.fontSize;
|
|
if (fontSize === 0) {
|
|
return;
|
|
}
|
|
|
|
var ctx = this.ctx;
|
|
var fontSizeScale = current.fontSizeScale;
|
|
var charSpacing = current.charSpacing;
|
|
var wordSpacing = current.wordSpacing;
|
|
var fontDirection = current.fontDirection;
|
|
var textHScale = current.textHScale * fontDirection;
|
|
var glyphsLength = glyphs.length;
|
|
var vertical = font.vertical;
|
|
var defaultVMetrics = font.defaultVMetrics;
|
|
var widthAdvanceScale = fontSize * current.fontMatrix[0];
|
|
|
|
var simpleFillText =
|
|
current.textRenderingMode === TextRenderingMode.FILL &&
|
|
!font.disableFontFace;
|
|
|
|
ctx.save();
|
|
ctx.transform.apply(ctx, current.textMatrix);
|
|
ctx.translate(current.x, current.y + current.textRise);
|
|
|
|
if (fontDirection > 0) {
|
|
ctx.scale(textHScale, -1);
|
|
} else {
|
|
ctx.scale(textHScale, 1);
|
|
}
|
|
|
|
var lineWidth = current.lineWidth;
|
|
var scale = current.textMatrixScale;
|
|
if (scale === 0 || lineWidth === 0) {
|
|
var fillStrokeMode = current.textRenderingMode &
|
|
TextRenderingMode.FILL_STROKE_MASK;
|
|
if (fillStrokeMode === TextRenderingMode.STROKE ||
|
|
fillStrokeMode === TextRenderingMode.FILL_STROKE) {
|
|
this.cachedGetSinglePixelWidth = null;
|
|
lineWidth = this.getSinglePixelWidth() * MIN_WIDTH_FACTOR;
|
|
}
|
|
} else {
|
|
lineWidth /= scale;
|
|
}
|
|
|
|
if (fontSizeScale !== 1.0) {
|
|
ctx.scale(fontSizeScale, fontSizeScale);
|
|
lineWidth /= fontSizeScale;
|
|
}
|
|
|
|
ctx.lineWidth = lineWidth;
|
|
|
|
var x = 0, i;
|
|
for (i = 0; i < glyphsLength; ++i) {
|
|
var glyph = glyphs[i];
|
|
if (glyph === null) {
|
|
// word break
|
|
x += fontDirection * wordSpacing;
|
|
continue;
|
|
} else if (isNum(glyph)) {
|
|
x += -glyph * fontSize * 0.001;
|
|
continue;
|
|
}
|
|
|
|
var restoreNeeded = false;
|
|
var character = glyph.fontChar;
|
|
var accent = glyph.accent;
|
|
var scaledX, scaledY, scaledAccentX, scaledAccentY;
|
|
var width = glyph.width;
|
|
if (vertical) {
|
|
var vmetric, vx, vy;
|
|
vmetric = glyph.vmetric || defaultVMetrics;
|
|
vx = glyph.vmetric ? vmetric[1] : width * 0.5;
|
|
vx = -vx * widthAdvanceScale;
|
|
vy = vmetric[2] * widthAdvanceScale;
|
|
|
|
width = vmetric ? -vmetric[0] : width;
|
|
scaledX = vx / fontSizeScale;
|
|
scaledY = (x + vy) / fontSizeScale;
|
|
} else {
|
|
scaledX = x / fontSizeScale;
|
|
scaledY = 0;
|
|
}
|
|
|
|
if (font.remeasure && width > 0 && this.isFontSubpixelAAEnabled) {
|
|
// some standard fonts may not have the exact width, trying to
|
|
// rescale per character
|
|
var measuredWidth = ctx.measureText(character).width * 1000 /
|
|
fontSize * fontSizeScale;
|
|
var characterScaleX = width / measuredWidth;
|
|
restoreNeeded = true;
|
|
ctx.save();
|
|
ctx.scale(characterScaleX, 1);
|
|
scaledX /= characterScaleX;
|
|
}
|
|
|
|
if (simpleFillText && !accent) {
|
|
// common case
|
|
ctx.fillText(character, scaledX, scaledY);
|
|
} else {
|
|
this.paintChar(character, scaledX, scaledY);
|
|
if (accent) {
|
|
scaledAccentX = scaledX + accent.offset.x / fontSizeScale;
|
|
scaledAccentY = scaledY - accent.offset.y / fontSizeScale;
|
|
this.paintChar(accent.fontChar, scaledAccentX, scaledAccentY);
|
|
}
|
|
}
|
|
|
|
var charWidth = width * widthAdvanceScale + charSpacing * fontDirection;
|
|
x += charWidth;
|
|
|
|
if (restoreNeeded) {
|
|
ctx.restore();
|
|
}
|
|
}
|
|
if (vertical) {
|
|
current.y -= x * textHScale;
|
|
} else {
|
|
current.x += x * textHScale;
|
|
}
|
|
ctx.restore();
|
|
},
|
|
|
|
showType3Text: function CanvasGraphics_showType3Text(glyphs) {
|
|
// Type3 fonts - each glyph is a "mini-PDF"
|
|
var ctx = this.ctx;
|
|
var current = this.current;
|
|
var font = current.font;
|
|
var fontSize = current.fontSize;
|
|
var fontDirection = current.fontDirection;
|
|
var charSpacing = current.charSpacing;
|
|
var wordSpacing = current.wordSpacing;
|
|
var textHScale = current.textHScale * fontDirection;
|
|
var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX;
|
|
var glyphsLength = glyphs.length;
|
|
var isTextInvisible =
|
|
current.textRenderingMode === TextRenderingMode.INVISIBLE;
|
|
var i, glyph, width;
|
|
|
|
if (isTextInvisible || fontSize === 0) {
|
|
return;
|
|
}
|
|
|
|
ctx.save();
|
|
ctx.transform.apply(ctx, current.textMatrix);
|
|
ctx.translate(current.x, current.y);
|
|
|
|
ctx.scale(textHScale, fontDirection);
|
|
|
|
for (i = 0; i < glyphsLength; ++i) {
|
|
glyph = glyphs[i];
|
|
if (glyph === null) {
|
|
// word break
|
|
this.ctx.translate(wordSpacing, 0);
|
|
current.x += wordSpacing * textHScale;
|
|
continue;
|
|
} else if (isNum(glyph)) {
|
|
var spacingLength = -glyph * 0.001 * fontSize;
|
|
this.ctx.translate(spacingLength, 0);
|
|
current.x += spacingLength * textHScale;
|
|
continue;
|
|
}
|
|
|
|
var operatorList = font.charProcOperatorList[glyph.operatorListId];
|
|
if (!operatorList) {
|
|
warn('Type3 character \"' + glyph.operatorListId +
|
|
'\" is not available');
|
|
continue;
|
|
}
|
|
this.processingType3 = glyph;
|
|
this.save();
|
|
ctx.scale(fontSize, fontSize);
|
|
ctx.transform.apply(ctx, fontMatrix);
|
|
this.executeOperatorList(operatorList);
|
|
this.restore();
|
|
|
|
var transformed = Util.applyTransform([glyph.width, 0], fontMatrix);
|
|
width = transformed[0] * fontSize + charSpacing;
|
|
|
|
ctx.translate(width, 0);
|
|
current.x += width * textHScale;
|
|
}
|
|
ctx.restore();
|
|
this.processingType3 = null;
|
|
},
|
|
|
|
// 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.ctx.rect(llx, lly, urx - llx, ury - lly);
|
|
this.clip();
|
|
this.endPath();
|
|
},
|
|
|
|
// Color
|
|
getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR) {
|
|
var pattern;
|
|
if (IR[0] === 'TilingPattern') {
|
|
var color = IR[1];
|
|
pattern = new TilingPattern(IR, color, this.ctx, this.objs,
|
|
this.commonObjs, this.baseTransform);
|
|
} else {
|
|
pattern = getShadingPatternFromIR(IR);
|
|
}
|
|
return pattern;
|
|
},
|
|
setStrokeColorN: function CanvasGraphics_setStrokeColorN(/*...*/) {
|
|
this.current.strokeColor = this.getColorN_Pattern(arguments);
|
|
},
|
|
setFillColorN: function CanvasGraphics_setFillColorN(/*...*/) {
|
|
this.current.fillColor = this.getColorN_Pattern(arguments);
|
|
this.current.patternFill = true;
|
|
},
|
|
setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) {
|
|
var color = Util.makeCssRgb(r, g, b);
|
|
this.ctx.strokeStyle = color;
|
|
this.current.strokeColor = color;
|
|
},
|
|
setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) {
|
|
var color = Util.makeCssRgb(r, g, b);
|
|
this.ctx.fillStyle = color;
|
|
this.current.fillColor = color;
|
|
this.current.patternFill = false;
|
|
},
|
|
|
|
shadingFill: function CanvasGraphics_shadingFill(patternIR) {
|
|
var ctx = this.ctx;
|
|
|
|
this.save();
|
|
var pattern = getShadingPatternFromIR(patternIR);
|
|
ctx.fillStyle = pattern.getPattern(ctx, this, true);
|
|
|
|
var inv = ctx.mozCurrentTransformInverse;
|
|
if (inv) {
|
|
var canvas = ctx.canvas;
|
|
var width = canvas.width;
|
|
var height = canvas.height;
|
|
|
|
var bl = Util.applyTransform([0, 0], inv);
|
|
var br = Util.applyTransform([0, height], inv);
|
|
var ul = Util.applyTransform([width, 0], inv);
|
|
var ur = Util.applyTransform([width, height], inv);
|
|
|
|
var x0 = Math.min(bl[0], br[0], ul[0], ur[0]);
|
|
var y0 = Math.min(bl[1], br[1], ul[1], ur[1]);
|
|
var x1 = Math.max(bl[0], br[0], ul[0], ur[0]);
|
|
var y1 = Math.max(bl[1], br[1], ul[1], ur[1]);
|
|
|
|
this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0);
|
|
} else {
|
|
// HACK to draw the gradient onto an infinite rectangle.
|
|
// PDF gradients are drawn across the entire image while
|
|
// Canvas only allows gradients to be drawn in a rectangle
|
|
// The following bug should allow us to remove this.
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=664884
|
|
|
|
this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10);
|
|
}
|
|
|
|
this.restore();
|
|
},
|
|
|
|
// Images
|
|
beginInlineImage: function CanvasGraphics_beginInlineImage() {
|
|
error('Should not call beginInlineImage');
|
|
},
|
|
beginImageData: function CanvasGraphics_beginImageData() {
|
|
error('Should not call beginImageData');
|
|
},
|
|
|
|
paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(matrix,
|
|
bbox) {
|
|
this.save();
|
|
this.baseTransformStack.push(this.baseTransform);
|
|
|
|
if (isArray(matrix) && 6 === matrix.length) {
|
|
this.transform.apply(this, matrix);
|
|
}
|
|
|
|
this.baseTransform = this.ctx.mozCurrentTransform;
|
|
|
|
if (isArray(bbox) && 4 === bbox.length) {
|
|
var width = bbox[2] - bbox[0];
|
|
var height = bbox[3] - bbox[1];
|
|
this.ctx.rect(bbox[0], bbox[1], width, height);
|
|
this.clip();
|
|
this.endPath();
|
|
}
|
|
},
|
|
|
|
paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() {
|
|
this.restore();
|
|
this.baseTransform = this.baseTransformStack.pop();
|
|
},
|
|
|
|
beginGroup: function CanvasGraphics_beginGroup(group) {
|
|
this.save();
|
|
var currentCtx = this.ctx;
|
|
// TODO non-isolated groups - according to Rik at adobe non-isolated
|
|
// group results aren't usually that different and they even have tools
|
|
// that ignore this setting. Notes from Rik on implmenting:
|
|
// - When you encounter an transparency group, create a new canvas with
|
|
// the dimensions of the bbox
|
|
// - copy the content from the previous canvas to the new canvas
|
|
// - draw as usual
|
|
// - remove the backdrop alpha:
|
|
// alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha
|
|
// value of your transparency group and 'alphaBackdrop' the alpha of the
|
|
// backdrop
|
|
// - remove background color:
|
|
// colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew)
|
|
if (!group.isolated) {
|
|
info('TODO: Support non-isolated groups.');
|
|
}
|
|
|
|
// TODO knockout - supposedly possible with the clever use of compositing
|
|
// modes.
|
|
if (group.knockout) {
|
|
warn('Knockout groups not supported.');
|
|
}
|
|
|
|
var currentTransform = currentCtx.mozCurrentTransform;
|
|
if (group.matrix) {
|
|
currentCtx.transform.apply(currentCtx, group.matrix);
|
|
}
|
|
assert(group.bbox, 'Bounding box is required.');
|
|
|
|
// Based on the current transform figure out how big the bounding box
|
|
// will actually be.
|
|
var bounds = Util.getAxialAlignedBoundingBox(
|
|
group.bbox,
|
|
currentCtx.mozCurrentTransform);
|
|
// Clip the bounding box to the current canvas.
|
|
var canvasBounds = [0,
|
|
0,
|
|
currentCtx.canvas.width,
|
|
currentCtx.canvas.height];
|
|
bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0];
|
|
// Use ceil in case we're between sizes so we don't create canvas that is
|
|
// too small and make the canvas at least 1x1 pixels.
|
|
var offsetX = Math.floor(bounds[0]);
|
|
var offsetY = Math.floor(bounds[1]);
|
|
var drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1);
|
|
var drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1);
|
|
var scaleX = 1, scaleY = 1;
|
|
if (drawnWidth > MAX_GROUP_SIZE) {
|
|
scaleX = drawnWidth / MAX_GROUP_SIZE;
|
|
drawnWidth = MAX_GROUP_SIZE;
|
|
}
|
|
if (drawnHeight > MAX_GROUP_SIZE) {
|
|
scaleY = drawnHeight / MAX_GROUP_SIZE;
|
|
drawnHeight = MAX_GROUP_SIZE;
|
|
}
|
|
|
|
var cacheId = 'groupAt' + this.groupLevel;
|
|
if (group.smask) {
|
|
// Using two cache entries is case if masks are used one after another.
|
|
cacheId += '_smask_' + ((this.smaskCounter++) % 2);
|
|
}
|
|
var scratchCanvas = CachedCanvases.getCanvas(
|
|
cacheId, drawnWidth, drawnHeight, true);
|
|
var groupCtx = scratchCanvas.context;
|
|
|
|
// Since we created a new canvas that is just the size of the bounding box
|
|
// we have to translate the group ctx.
|
|
groupCtx.scale(1 / scaleX, 1 / scaleY);
|
|
groupCtx.translate(-offsetX, -offsetY);
|
|
groupCtx.transform.apply(groupCtx, currentTransform);
|
|
|
|
if (group.smask) {
|
|
// Saving state and cached mask to be used in setGState.
|
|
this.smaskStack.push({
|
|
canvas: scratchCanvas.canvas,
|
|
context: groupCtx,
|
|
offsetX: offsetX,
|
|
offsetY: offsetY,
|
|
scaleX: scaleX,
|
|
scaleY: scaleY,
|
|
subtype: group.smask.subtype,
|
|
backdrop: group.smask.backdrop
|
|
});
|
|
} else {
|
|
// Setup the current ctx so when the group is popped we draw it at the
|
|
// right location.
|
|
currentCtx.setTransform(1, 0, 0, 1, 0, 0);
|
|
currentCtx.translate(offsetX, offsetY);
|
|
currentCtx.scale(scaleX, scaleY);
|
|
}
|
|
// The transparency group inherits all off the current graphics state
|
|
// except the blend mode, soft mask, and alpha constants.
|
|
copyCtxState(currentCtx, groupCtx);
|
|
this.ctx = groupCtx;
|
|
this.setGState([
|
|
['BM', 'Normal'],
|
|
['ca', 1],
|
|
['CA', 1]
|
|
]);
|
|
this.groupStack.push(currentCtx);
|
|
this.groupLevel++;
|
|
},
|
|
|
|
endGroup: function CanvasGraphics_endGroup(group) {
|
|
this.groupLevel--;
|
|
var groupCtx = this.ctx;
|
|
this.ctx = this.groupStack.pop();
|
|
// Turn off image smoothing to avoid sub pixel interpolation which can
|
|
// look kind of blurry for some pdfs.
|
|
if (this.ctx.imageSmoothingEnabled !== undefined) {
|
|
this.ctx.imageSmoothingEnabled = false;
|
|
} else {
|
|
this.ctx.mozImageSmoothingEnabled = false;
|
|
}
|
|
if (group.smask) {
|
|
this.tempSMask = this.smaskStack.pop();
|
|
} else {
|
|
this.ctx.drawImage(groupCtx.canvas, 0, 0);
|
|
}
|
|
this.restore();
|
|
},
|
|
|
|
beginAnnotations: function CanvasGraphics_beginAnnotations() {
|
|
this.save();
|
|
this.current = new CanvasExtraState();
|
|
},
|
|
|
|
endAnnotations: function CanvasGraphics_endAnnotations() {
|
|
this.restore();
|
|
},
|
|
|
|
beginAnnotation: function CanvasGraphics_beginAnnotation(rect, transform,
|
|
matrix) {
|
|
this.save();
|
|
|
|
if (isArray(rect) && 4 === rect.length) {
|
|
var width = rect[2] - rect[0];
|
|
var height = rect[3] - rect[1];
|
|
this.ctx.rect(rect[0], rect[1], width, height);
|
|
this.clip();
|
|
this.endPath();
|
|
}
|
|
|
|
this.transform.apply(this, transform);
|
|
this.transform.apply(this, matrix);
|
|
},
|
|
|
|
endAnnotation: function CanvasGraphics_endAnnotation() {
|
|
this.restore();
|
|
},
|
|
|
|
paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) {
|
|
var domImage = this.objs.get(objId);
|
|
if (!domImage) {
|
|
warn('Dependent image isn\'t ready yet');
|
|
return;
|
|
}
|
|
|
|
this.save();
|
|
|
|
var ctx = this.ctx;
|
|
// scale the image to the unit square
|
|
ctx.scale(1 / w, -1 / h);
|
|
|
|
ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height,
|
|
0, -h, w, h);
|
|
if (this.imageLayer) {
|
|
var currentTransform = ctx.mozCurrentTransformInverse;
|
|
var position = this.getCanvasPosition(0, 0);
|
|
this.imageLayer.appendImage({
|
|
objId: objId,
|
|
left: position[0],
|
|
top: position[1],
|
|
width: w / currentTransform[0],
|
|
height: h / currentTransform[3]
|
|
});
|
|
}
|
|
this.restore();
|
|
},
|
|
|
|
paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) {
|
|
var ctx = this.ctx;
|
|
var width = img.width, height = img.height;
|
|
var fillColor = this.current.fillColor;
|
|
var isPatternFill = this.current.patternFill;
|
|
|
|
var glyph = this.processingType3;
|
|
|
|
if (COMPILE_TYPE3_GLYPHS && glyph && glyph.compiled === undefined) {
|
|
if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) {
|
|
glyph.compiled =
|
|
compileType3Glyph({data: img.data, width: width, height: height});
|
|
} else {
|
|
glyph.compiled = null;
|
|
}
|
|
}
|
|
|
|
if (glyph && glyph.compiled) {
|
|
glyph.compiled(ctx);
|
|
return;
|
|
}
|
|
|
|
var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height);
|
|
var maskCtx = maskCanvas.context;
|
|
maskCtx.save();
|
|
|
|
putBinaryImageMask(maskCtx, img);
|
|
|
|
maskCtx.globalCompositeOperation = 'source-in';
|
|
|
|
maskCtx.fillStyle = isPatternFill ?
|
|
fillColor.getPattern(maskCtx, this) : fillColor;
|
|
maskCtx.fillRect(0, 0, width, height);
|
|
|
|
maskCtx.restore();
|
|
|
|
this.paintInlineImageXObject(maskCanvas.canvas);
|
|
},
|
|
|
|
paintImageMaskXObjectRepeat:
|
|
function CanvasGraphics_paintImageMaskXObjectRepeat(imgData, scaleX,
|
|
scaleY, positions) {
|
|
var width = imgData.width;
|
|
var height = imgData.height;
|
|
var fillColor = this.current.fillColor;
|
|
var isPatternFill = this.current.patternFill;
|
|
|
|
var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height);
|
|
var maskCtx = maskCanvas.context;
|
|
maskCtx.save();
|
|
|
|
putBinaryImageMask(maskCtx, imgData);
|
|
|
|
maskCtx.globalCompositeOperation = 'source-in';
|
|
|
|
maskCtx.fillStyle = isPatternFill ?
|
|
fillColor.getPattern(maskCtx, this) : fillColor;
|
|
maskCtx.fillRect(0, 0, width, height);
|
|
|
|
maskCtx.restore();
|
|
|
|
var ctx = this.ctx;
|
|
for (var i = 0, ii = positions.length; i < ii; i += 2) {
|
|
ctx.save();
|
|
ctx.transform(scaleX, 0, 0, scaleY, positions[i], positions[i + 1]);
|
|
ctx.scale(1, -1);
|
|
ctx.drawImage(maskCanvas.canvas, 0, 0, width, height,
|
|
0, -1, 1, 1);
|
|
ctx.restore();
|
|
}
|
|
},
|
|
|
|
paintImageMaskXObjectGroup:
|
|
function CanvasGraphics_paintImageMaskXObjectGroup(images) {
|
|
var ctx = this.ctx;
|
|
|
|
var fillColor = this.current.fillColor;
|
|
var isPatternFill = this.current.patternFill;
|
|
for (var i = 0, ii = images.length; i < ii; i++) {
|
|
var image = images[i];
|
|
var width = image.width, height = image.height;
|
|
|
|
var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height);
|
|
var maskCtx = maskCanvas.context;
|
|
maskCtx.save();
|
|
|
|
putBinaryImageMask(maskCtx, image);
|
|
|
|
maskCtx.globalCompositeOperation = 'source-in';
|
|
|
|
maskCtx.fillStyle = isPatternFill ?
|
|
fillColor.getPattern(maskCtx, this) : fillColor;
|
|
maskCtx.fillRect(0, 0, width, height);
|
|
|
|
maskCtx.restore();
|
|
|
|
ctx.save();
|
|
ctx.transform.apply(ctx, image.transform);
|
|
ctx.scale(1, -1);
|
|
ctx.drawImage(maskCanvas.canvas, 0, 0, width, height,
|
|
0, -1, 1, 1);
|
|
ctx.restore();
|
|
}
|
|
},
|
|
|
|
paintImageXObject: function CanvasGraphics_paintImageXObject(objId) {
|
|
var imgData = this.objs.get(objId);
|
|
if (!imgData) {
|
|
warn('Dependent image isn\'t ready yet');
|
|
return;
|
|
}
|
|
|
|
this.paintInlineImageXObject(imgData);
|
|
},
|
|
|
|
paintImageXObjectRepeat:
|
|
function CanvasGraphics_paintImageXObjectRepeat(objId, scaleX, scaleY,
|
|
positions) {
|
|
var imgData = this.objs.get(objId);
|
|
if (!imgData) {
|
|
warn('Dependent image isn\'t ready yet');
|
|
return;
|
|
}
|
|
|
|
var width = imgData.width;
|
|
var height = imgData.height;
|
|
var map = [];
|
|
for (var i = 0, ii = positions.length; i < ii; i += 2) {
|
|
map.push({transform: [scaleX, 0, 0, scaleY, positions[i],
|
|
positions[i + 1]], x: 0, y: 0, w: width, h: height});
|
|
}
|
|
this.paintInlineImageXObjectGroup(imgData, map);
|
|
},
|
|
|
|
paintInlineImageXObject:
|
|
function CanvasGraphics_paintInlineImageXObject(imgData) {
|
|
var width = imgData.width;
|
|
var height = imgData.height;
|
|
var ctx = this.ctx;
|
|
|
|
this.save();
|
|
// scale the image to the unit square
|
|
ctx.scale(1 / width, -1 / height);
|
|
|
|
var currentTransform = ctx.mozCurrentTransformInverse;
|
|
var a = currentTransform[0], b = currentTransform[1];
|
|
var widthScale = Math.max(Math.sqrt(a * a + b * b), 1);
|
|
var c = currentTransform[2], d = currentTransform[3];
|
|
var heightScale = Math.max(Math.sqrt(c * c + d * d), 1);
|
|
|
|
var imgToPaint, tmpCanvas;
|
|
// instanceof HTMLElement does not work in jsdom node.js module
|
|
if (imgData instanceof HTMLElement || !imgData.data) {
|
|
imgToPaint = imgData;
|
|
} else {
|
|
tmpCanvas = CachedCanvases.getCanvas('inlineImage', width, height);
|
|
var tmpCtx = tmpCanvas.context;
|
|
putBinaryImageData(tmpCtx, imgData);
|
|
imgToPaint = tmpCanvas.canvas;
|
|
}
|
|
|
|
var paintWidth = width, paintHeight = height;
|
|
var tmpCanvasId = 'prescale1';
|
|
// Vertial or horizontal scaling shall not be more than 2 to not loose the
|
|
// pixels during drawImage operation, painting on the temporary canvas(es)
|
|
// that are twice smaller in size
|
|
while ((widthScale > 2 && paintWidth > 1) ||
|
|
(heightScale > 2 && paintHeight > 1)) {
|
|
var newWidth = paintWidth, newHeight = paintHeight;
|
|
if (widthScale > 2 && paintWidth > 1) {
|
|
newWidth = Math.ceil(paintWidth / 2);
|
|
widthScale /= paintWidth / newWidth;
|
|
}
|
|
if (heightScale > 2 && paintHeight > 1) {
|
|
newHeight = Math.ceil(paintHeight / 2);
|
|
heightScale /= paintHeight / newHeight;
|
|
}
|
|
tmpCanvas = CachedCanvases.getCanvas(tmpCanvasId, newWidth, newHeight);
|
|
tmpCtx = tmpCanvas.context;
|
|
tmpCtx.clearRect(0, 0, newWidth, newHeight);
|
|
tmpCtx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight,
|
|
0, 0, newWidth, newHeight);
|
|
imgToPaint = tmpCanvas.canvas;
|
|
paintWidth = newWidth;
|
|
paintHeight = newHeight;
|
|
tmpCanvasId = tmpCanvasId === 'prescale1' ? 'prescale2' : 'prescale1';
|
|
}
|
|
ctx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight,
|
|
0, -height, width, height);
|
|
|
|
if (this.imageLayer) {
|
|
var position = this.getCanvasPosition(0, -height);
|
|
this.imageLayer.appendImage({
|
|
imgData: imgData,
|
|
left: position[0],
|
|
top: position[1],
|
|
width: width / currentTransform[0],
|
|
height: height / currentTransform[3]
|
|
});
|
|
}
|
|
this.restore();
|
|
},
|
|
|
|
paintInlineImageXObjectGroup:
|
|
function CanvasGraphics_paintInlineImageXObjectGroup(imgData, map) {
|
|
var ctx = this.ctx;
|
|
var w = imgData.width;
|
|
var h = imgData.height;
|
|
|
|
var tmpCanvas = CachedCanvases.getCanvas('inlineImage', w, h);
|
|
var tmpCtx = tmpCanvas.context;
|
|
putBinaryImageData(tmpCtx, imgData);
|
|
|
|
for (var i = 0, ii = map.length; i < ii; i++) {
|
|
var entry = map[i];
|
|
ctx.save();
|
|
ctx.transform.apply(ctx, entry.transform);
|
|
ctx.scale(1, -1);
|
|
ctx.drawImage(tmpCanvas.canvas, entry.x, entry.y, entry.w, entry.h,
|
|
0, -1, 1, 1);
|
|
if (this.imageLayer) {
|
|
var position = this.getCanvasPosition(entry.x, entry.y);
|
|
this.imageLayer.appendImage({
|
|
imgData: imgData,
|
|
left: position[0],
|
|
top: position[1],
|
|
width: w,
|
|
height: h
|
|
});
|
|
}
|
|
ctx.restore();
|
|
}
|
|
},
|
|
|
|
paintSolidColorImageMask:
|
|
function CanvasGraphics_paintSolidColorImageMask() {
|
|
this.ctx.fillRect(0, 0, 1, 1);
|
|
},
|
|
|
|
// Marked content
|
|
|
|
markPoint: function CanvasGraphics_markPoint(tag) {
|
|
// TODO Marked content.
|
|
},
|
|
markPointProps: function CanvasGraphics_markPointProps(tag, properties) {
|
|
// TODO Marked content.
|
|
},
|
|
beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) {
|
|
// TODO Marked content.
|
|
},
|
|
beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps(
|
|
tag, properties) {
|
|
// TODO Marked content.
|
|
},
|
|
endMarkedContent: function CanvasGraphics_endMarkedContent() {
|
|
// TODO Marked content.
|
|
},
|
|
|
|
// Compatibility
|
|
|
|
beginCompat: function CanvasGraphics_beginCompat() {
|
|
// TODO ignore undefined operators (should we do that anyway?)
|
|
},
|
|
endCompat: function CanvasGraphics_endCompat() {
|
|
// TODO stop ignoring undefined operators
|
|
},
|
|
|
|
// Helper functions
|
|
|
|
consumePath: function CanvasGraphics_consumePath() {
|
|
var ctx = this.ctx;
|
|
if (this.pendingClip) {
|
|
if (this.pendingClip === EO_CLIP) {
|
|
if (ctx.mozFillRule !== undefined) {
|
|
ctx.mozFillRule = 'evenodd';
|
|
ctx.clip();
|
|
ctx.mozFillRule = 'nonzero';
|
|
} else {
|
|
try {
|
|
ctx.clip('evenodd');
|
|
} catch (ex) {
|
|
// shouldn't really happen, but browsers might think differently
|
|
ctx.clip();
|
|
}
|
|
}
|
|
} else {
|
|
ctx.clip();
|
|
}
|
|
this.pendingClip = null;
|
|
}
|
|
ctx.beginPath();
|
|
},
|
|
getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) {
|
|
if (this.cachedGetSinglePixelWidth === null) {
|
|
var inverse = this.ctx.mozCurrentTransformInverse;
|
|
// max of the current horizontal and vertical scale
|
|
this.cachedGetSinglePixelWidth = Math.sqrt(Math.max(
|
|
(inverse[0] * inverse[0] + inverse[1] * inverse[1]),
|
|
(inverse[2] * inverse[2] + inverse[3] * inverse[3])));
|
|
}
|
|
return this.cachedGetSinglePixelWidth;
|
|
},
|
|
getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) {
|
|
var transform = this.ctx.mozCurrentTransform;
|
|
return [
|
|
transform[0] * x + transform[2] * y + transform[4],
|
|
transform[1] * x + transform[3] * y + transform[5]
|
|
];
|
|
}
|
|
};
|
|
|
|
for (var op in OPS) {
|
|
CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op];
|
|
}
|
|
|
|
return CanvasGraphics;
|
|
})();
|
|
|
|
|
|
var WebGLUtils = (function WebGLUtilsClosure() {
|
|
function loadShader(gl, code, shaderType) {
|
|
var shader = gl.createShader(shaderType);
|
|
gl.shaderSource(shader, code);
|
|
gl.compileShader(shader);
|
|
var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
|
|
if (!compiled) {
|
|
var errorMsg = gl.getShaderInfoLog(shader);
|
|
throw new Error('Error during shader compilation: ' + errorMsg);
|
|
}
|
|
return shader;
|
|
}
|
|
function createVertexShader(gl, code) {
|
|
return loadShader(gl, code, gl.VERTEX_SHADER);
|
|
}
|
|
function createFragmentShader(gl, code) {
|
|
return loadShader(gl, code, gl.FRAGMENT_SHADER);
|
|
}
|
|
function createProgram(gl, shaders) {
|
|
var program = gl.createProgram();
|
|
for (var i = 0, ii = shaders.length; i < ii; ++i) {
|
|
gl.attachShader(program, shaders[i]);
|
|
}
|
|
gl.linkProgram(program);
|
|
var linked = gl.getProgramParameter(program, gl.LINK_STATUS);
|
|
if (!linked) {
|
|
var errorMsg = gl.getProgramInfoLog(program);
|
|
throw new Error('Error during program linking: ' + errorMsg);
|
|
}
|
|
return program;
|
|
}
|
|
function createTexture(gl, image, textureId) {
|
|
gl.activeTexture(textureId);
|
|
var texture = gl.createTexture();
|
|
gl.bindTexture(gl.TEXTURE_2D, texture);
|
|
|
|
// Set the parameters so we can render any size image.
|
|
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
|
|
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
|
|
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
|
|
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
|
|
|
|
// Upload the image into the texture.
|
|
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);
|
|
return texture;
|
|
}
|
|
|
|
var currentGL, currentCanvas;
|
|
function generateGL() {
|
|
if (currentGL) {
|
|
return;
|
|
}
|
|
currentCanvas = document.createElement('canvas');
|
|
currentGL = currentCanvas.getContext('webgl',
|
|
{ premultipliedalpha: false });
|
|
}
|
|
|
|
var smaskVertexShaderCode = '\
|
|
attribute vec2 a_position; \
|
|
attribute vec2 a_texCoord; \
|
|
\
|
|
uniform vec2 u_resolution; \
|
|
\
|
|
varying vec2 v_texCoord; \
|
|
\
|
|
void main() { \
|
|
vec2 clipSpace = (a_position / u_resolution) * 2.0 - 1.0; \
|
|
gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \
|
|
\
|
|
v_texCoord = a_texCoord; \
|
|
} ';
|
|
|
|
var smaskFragmentShaderCode = '\
|
|
precision mediump float; \
|
|
\
|
|
uniform vec4 u_backdrop; \
|
|
uniform int u_subtype; \
|
|
uniform sampler2D u_image; \
|
|
uniform sampler2D u_mask; \
|
|
\
|
|
varying vec2 v_texCoord; \
|
|
\
|
|
void main() { \
|
|
vec4 imageColor = texture2D(u_image, v_texCoord); \
|
|
vec4 maskColor = texture2D(u_mask, v_texCoord); \
|
|
if (u_backdrop.a > 0.0) { \
|
|
maskColor.rgb = maskColor.rgb * maskColor.a + \
|
|
u_backdrop.rgb * (1.0 - maskColor.a); \
|
|
} \
|
|
float lum; \
|
|
if (u_subtype == 0) { \
|
|
lum = maskColor.a; \
|
|
} else { \
|
|
lum = maskColor.r * 0.3 + maskColor.g * 0.59 + \
|
|
maskColor.b * 0.11; \
|
|
} \
|
|
imageColor.a *= lum; \
|
|
imageColor.rgb *= imageColor.a; \
|
|
gl_FragColor = imageColor; \
|
|
} ';
|
|
|
|
var smaskCache = null;
|
|
|
|
function initSmaskGL() {
|
|
var canvas, gl;
|
|
|
|
generateGL();
|
|
canvas = currentCanvas;
|
|
currentCanvas = null;
|
|
gl = currentGL;
|
|
currentGL = null;
|
|
|
|
// setup a GLSL program
|
|
var vertexShader = createVertexShader(gl, smaskVertexShaderCode);
|
|
var fragmentShader = createFragmentShader(gl, smaskFragmentShaderCode);
|
|
var program = createProgram(gl, [vertexShader, fragmentShader]);
|
|
gl.useProgram(program);
|
|
|
|
var cache = {};
|
|
cache.gl = gl;
|
|
cache.canvas = canvas;
|
|
cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution');
|
|
cache.positionLocation = gl.getAttribLocation(program, 'a_position');
|
|
cache.backdropLocation = gl.getUniformLocation(program, 'u_backdrop');
|
|
cache.subtypeLocation = gl.getUniformLocation(program, 'u_subtype');
|
|
|
|
var texCoordLocation = gl.getAttribLocation(program, 'a_texCoord');
|
|
var texLayerLocation = gl.getUniformLocation(program, 'u_image');
|
|
var texMaskLocation = gl.getUniformLocation(program, 'u_mask');
|
|
|
|
// provide texture coordinates for the rectangle.
|
|
var texCoordBuffer = gl.createBuffer();
|
|
gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
|
|
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
|
|
0.0, 0.0,
|
|
1.0, 0.0,
|
|
0.0, 1.0,
|
|
0.0, 1.0,
|
|
1.0, 0.0,
|
|
1.0, 1.0]), gl.STATIC_DRAW);
|
|
gl.enableVertexAttribArray(texCoordLocation);
|
|
gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0);
|
|
|
|
gl.uniform1i(texLayerLocation, 0);
|
|
gl.uniform1i(texMaskLocation, 1);
|
|
|
|
smaskCache = cache;
|
|
}
|
|
|
|
function composeSMask(layer, mask, properties) {
|
|
var width = layer.width, height = layer.height;
|
|
|
|
if (!smaskCache) {
|
|
initSmaskGL();
|
|
}
|
|
var cache = smaskCache,canvas = cache.canvas, gl = cache.gl;
|
|
canvas.width = width;
|
|
canvas.height = height;
|
|
gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
|
|
gl.uniform2f(cache.resolutionLocation, width, height);
|
|
|
|
if (properties.backdrop) {
|
|
gl.uniform4f(cache.resolutionLocation, properties.backdrop[0],
|
|
properties.backdrop[1], properties.backdrop[2], 1);
|
|
} else {
|
|
gl.uniform4f(cache.resolutionLocation, 0, 0, 0, 0);
|
|
}
|
|
gl.uniform1i(cache.subtypeLocation,
|
|
properties.subtype === 'Luminosity' ? 1 : 0);
|
|
|
|
// Create a textures
|
|
var texture = createTexture(gl, layer, gl.TEXTURE0);
|
|
var maskTexture = createTexture(gl, mask, gl.TEXTURE1);
|
|
|
|
|
|
// Create a buffer and put a single clipspace rectangle in
|
|
// it (2 triangles)
|
|
var buffer = gl.createBuffer();
|
|
gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
|
|
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
|
|
0, 0,
|
|
width, 0,
|
|
0, height,
|
|
0, height,
|
|
width, 0,
|
|
width, height]), gl.STATIC_DRAW);
|
|
gl.enableVertexAttribArray(cache.positionLocation);
|
|
gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);
|
|
|
|
// draw
|
|
gl.clearColor(0, 0, 0, 0);
|
|
gl.enable(gl.BLEND);
|
|
gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA);
|
|
gl.clear(gl.COLOR_BUFFER_BIT);
|
|
|
|
gl.drawArrays(gl.TRIANGLES, 0, 6);
|
|
|
|
gl.flush();
|
|
|
|
gl.deleteTexture(texture);
|
|
gl.deleteTexture(maskTexture);
|
|
gl.deleteBuffer(buffer);
|
|
|
|
return canvas;
|
|
}
|
|
|
|
var figuresVertexShaderCode = '\
|
|
attribute vec2 a_position; \
|
|
attribute vec3 a_color; \
|
|
\
|
|
uniform vec2 u_resolution; \
|
|
uniform vec2 u_scale; \
|
|
uniform vec2 u_offset; \
|
|
\
|
|
varying vec4 v_color; \
|
|
\
|
|
void main() { \
|
|
vec2 position = (a_position + u_offset) * u_scale; \
|
|
vec2 clipSpace = (position / u_resolution) * 2.0 - 1.0; \
|
|
gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \
|
|
\
|
|
v_color = vec4(a_color / 255.0, 1.0); \
|
|
} ';
|
|
|
|
var figuresFragmentShaderCode = '\
|
|
precision mediump float; \
|
|
\
|
|
varying vec4 v_color; \
|
|
\
|
|
void main() { \
|
|
gl_FragColor = v_color; \
|
|
} ';
|
|
|
|
var figuresCache = null;
|
|
|
|
function initFiguresGL() {
|
|
var canvas, gl;
|
|
|
|
generateGL();
|
|
canvas = currentCanvas;
|
|
currentCanvas = null;
|
|
gl = currentGL;
|
|
currentGL = null;
|
|
|
|
// setup a GLSL program
|
|
var vertexShader = createVertexShader(gl, figuresVertexShaderCode);
|
|
var fragmentShader = createFragmentShader(gl, figuresFragmentShaderCode);
|
|
var program = createProgram(gl, [vertexShader, fragmentShader]);
|
|
gl.useProgram(program);
|
|
|
|
var cache = {};
|
|
cache.gl = gl;
|
|
cache.canvas = canvas;
|
|
cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution');
|
|
cache.scaleLocation = gl.getUniformLocation(program, 'u_scale');
|
|
cache.offsetLocation = gl.getUniformLocation(program, 'u_offset');
|
|
cache.positionLocation = gl.getAttribLocation(program, 'a_position');
|
|
cache.colorLocation = gl.getAttribLocation(program, 'a_color');
|
|
|
|
figuresCache = cache;
|
|
}
|
|
|
|
function drawFigures(width, height, backgroundColor, figures, context) {
|
|
if (!figuresCache) {
|
|
initFiguresGL();
|
|
}
|
|
var cache = figuresCache, canvas = cache.canvas, gl = cache.gl;
|
|
|
|
canvas.width = width;
|
|
canvas.height = height;
|
|
gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
|
|
gl.uniform2f(cache.resolutionLocation, width, height);
|
|
|
|
// count triangle points
|
|
var count = 0;
|
|
var i, ii, rows;
|
|
for (i = 0, ii = figures.length; i < ii; i++) {
|
|
switch (figures[i].type) {
|
|
case 'lattice':
|
|
rows = (figures[i].coords.length / figures[i].verticesPerRow) | 0;
|
|
count += (rows - 1) * (figures[i].verticesPerRow - 1) * 6;
|
|
break;
|
|
case 'triangles':
|
|
count += figures[i].coords.length;
|
|
break;
|
|
}
|
|
}
|
|
// transfer data
|
|
var coords = new Float32Array(count * 2);
|
|
var colors = new Uint8Array(count * 3);
|
|
var coordsMap = context.coords, colorsMap = context.colors;
|
|
var pIndex = 0, cIndex = 0;
|
|
for (i = 0, ii = figures.length; i < ii; i++) {
|
|
var figure = figures[i], ps = figure.coords, cs = figure.colors;
|
|
switch (figure.type) {
|
|
case 'lattice':
|
|
var cols = figure.verticesPerRow;
|
|
rows = (ps.length / cols) | 0;
|
|
for (var row = 1; row < rows; row++) {
|
|
var offset = row * cols + 1;
|
|
for (var col = 1; col < cols; col++, offset++) {
|
|
coords[pIndex] = coordsMap[ps[offset - cols - 1]];
|
|
coords[pIndex + 1] = coordsMap[ps[offset - cols - 1] + 1];
|
|
coords[pIndex + 2] = coordsMap[ps[offset - cols]];
|
|
coords[pIndex + 3] = coordsMap[ps[offset - cols] + 1];
|
|
coords[pIndex + 4] = coordsMap[ps[offset - 1]];
|
|
coords[pIndex + 5] = coordsMap[ps[offset - 1] + 1];
|
|
colors[cIndex] = colorsMap[cs[offset - cols - 1]];
|
|
colors[cIndex + 1] = colorsMap[cs[offset - cols - 1] + 1];
|
|
colors[cIndex + 2] = colorsMap[cs[offset - cols - 1] + 2];
|
|
colors[cIndex + 3] = colorsMap[cs[offset - cols]];
|
|
colors[cIndex + 4] = colorsMap[cs[offset - cols] + 1];
|
|
colors[cIndex + 5] = colorsMap[cs[offset - cols] + 2];
|
|
colors[cIndex + 6] = colorsMap[cs[offset - 1]];
|
|
colors[cIndex + 7] = colorsMap[cs[offset - 1] + 1];
|
|
colors[cIndex + 8] = colorsMap[cs[offset - 1] + 2];
|
|
|
|
coords[pIndex + 6] = coords[pIndex + 2];
|
|
coords[pIndex + 7] = coords[pIndex + 3];
|
|
coords[pIndex + 8] = coords[pIndex + 4];
|
|
coords[pIndex + 9] = coords[pIndex + 5];
|
|
coords[pIndex + 10] = coordsMap[ps[offset]];
|
|
coords[pIndex + 11] = coordsMap[ps[offset] + 1];
|
|
colors[cIndex + 9] = colors[cIndex + 3];
|
|
colors[cIndex + 10] = colors[cIndex + 4];
|
|
colors[cIndex + 11] = colors[cIndex + 5];
|
|
colors[cIndex + 12] = colors[cIndex + 6];
|
|
colors[cIndex + 13] = colors[cIndex + 7];
|
|
colors[cIndex + 14] = colors[cIndex + 8];
|
|
colors[cIndex + 15] = colorsMap[cs[offset]];
|
|
colors[cIndex + 16] = colorsMap[cs[offset] + 1];
|
|
colors[cIndex + 17] = colorsMap[cs[offset] + 2];
|
|
pIndex += 12;
|
|
cIndex += 18;
|
|
}
|
|
}
|
|
break;
|
|
case 'triangles':
|
|
for (var j = 0, jj = ps.length; j < jj; j++) {
|
|
coords[pIndex] = coordsMap[ps[j]];
|
|
coords[pIndex + 1] = coordsMap[ps[j] + 1];
|
|
colors[cIndex] = colorsMap[cs[i]];
|
|
colors[cIndex + 1] = colorsMap[cs[j] + 1];
|
|
colors[cIndex + 2] = colorsMap[cs[j] + 2];
|
|
pIndex += 2;
|
|
cIndex += 3;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// draw
|
|
if (backgroundColor) {
|
|
gl.clearColor(backgroundColor[0] / 255, backgroundColor[1] / 255,
|
|
backgroundColor[2] / 255, 1.0);
|
|
} else {
|
|
gl.clearColor(0, 0, 0, 0);
|
|
}
|
|
gl.clear(gl.COLOR_BUFFER_BIT);
|
|
|
|
var coordsBuffer = gl.createBuffer();
|
|
gl.bindBuffer(gl.ARRAY_BUFFER, coordsBuffer);
|
|
gl.bufferData(gl.ARRAY_BUFFER, coords, gl.STATIC_DRAW);
|
|
gl.enableVertexAttribArray(cache.positionLocation);
|
|
gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);
|
|
|
|
var colorsBuffer = gl.createBuffer();
|
|
gl.bindBuffer(gl.ARRAY_BUFFER, colorsBuffer);
|
|
gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW);
|
|
gl.enableVertexAttribArray(cache.colorLocation);
|
|
gl.vertexAttribPointer(cache.colorLocation, 3, gl.UNSIGNED_BYTE, false,
|
|
0, 0);
|
|
|
|
gl.uniform2f(cache.scaleLocation, context.scaleX, context.scaleY);
|
|
gl.uniform2f(cache.offsetLocation, context.offsetX, context.offsetY);
|
|
|
|
gl.drawArrays(gl.TRIANGLES, 0, count);
|
|
|
|
gl.flush();
|
|
|
|
gl.deleteBuffer(coordsBuffer);
|
|
gl.deleteBuffer(colorsBuffer);
|
|
|
|
return canvas;
|
|
}
|
|
|
|
function cleanup() {
|
|
if (smaskCache && smaskCache.canvas) {
|
|
smaskCache.canvas.width = 0;
|
|
smaskCache.canvas.height = 0;
|
|
}
|
|
if (figuresCache && figuresCache.canvas) {
|
|
figuresCache.canvas.width = 0;
|
|
figuresCache.canvas.height = 0;
|
|
}
|
|
smaskCache = null;
|
|
figuresCache = null;
|
|
}
|
|
|
|
return {
|
|
get isEnabled() {
|
|
if (PDFJS.disableWebGL) {
|
|
return false;
|
|
}
|
|
var enabled = false;
|
|
try {
|
|
generateGL();
|
|
enabled = !!currentGL;
|
|
} catch (e) { }
|
|
return shadow(this, 'isEnabled', enabled);
|
|
},
|
|
composeSMask: composeSMask,
|
|
drawFigures: drawFigures,
|
|
clear: cleanup
|
|
};
|
|
})();
|
|
|
|
|
|
var ShadingIRs = {};
|
|
|
|
ShadingIRs.RadialAxial = {
|
|
fromIR: function RadialAxial_fromIR(raw) {
|
|
var type = raw[1];
|
|
var colorStops = raw[2];
|
|
var p0 = raw[3];
|
|
var p1 = raw[4];
|
|
var r0 = raw[5];
|
|
var r1 = raw[6];
|
|
return {
|
|
type: 'Pattern',
|
|
getPattern: function RadialAxial_getPattern(ctx) {
|
|
var grad;
|
|
if (type === 'axial') {
|
|
grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);
|
|
} else if (type === 'radial') {
|
|
grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1);
|
|
}
|
|
|
|
for (var i = 0, ii = colorStops.length; i < ii; ++i) {
|
|
var c = colorStops[i];
|
|
grad.addColorStop(c[0], c[1]);
|
|
}
|
|
return grad;
|
|
}
|
|
};
|
|
}
|
|
};
|
|
|
|
var createMeshCanvas = (function createMeshCanvasClosure() {
|
|
function drawTriangle(data, context, p1, p2, p3, c1, c2, c3) {
|
|
// Very basic Gouraud-shaded triangle rasterization algorithm.
|
|
var coords = context.coords, colors = context.colors;
|
|
var bytes = data.data, rowSize = data.width * 4;
|
|
var tmp;
|
|
if (coords[p1 + 1] > coords[p2 + 1]) {
|
|
tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp;
|
|
}
|
|
if (coords[p2 + 1] > coords[p3 + 1]) {
|
|
tmp = p2; p2 = p3; p3 = tmp; tmp = c2; c2 = c3; c3 = tmp;
|
|
}
|
|
if (coords[p1 + 1] > coords[p2 + 1]) {
|
|
tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp;
|
|
}
|
|
var x1 = (coords[p1] + context.offsetX) * context.scaleX;
|
|
var y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY;
|
|
var x2 = (coords[p2] + context.offsetX) * context.scaleX;
|
|
var y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY;
|
|
var x3 = (coords[p3] + context.offsetX) * context.scaleX;
|
|
var y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY;
|
|
if (y1 >= y3) {
|
|
return;
|
|
}
|
|
var c1r = colors[c1], c1g = colors[c1 + 1], c1b = colors[c1 + 2];
|
|
var c2r = colors[c2], c2g = colors[c2 + 1], c2b = colors[c2 + 2];
|
|
var c3r = colors[c3], c3g = colors[c3 + 1], c3b = colors[c3 + 2];
|
|
|
|
var minY = Math.round(y1), maxY = Math.round(y3);
|
|
var xa, car, cag, cab;
|
|
var xb, cbr, cbg, cbb;
|
|
var k;
|
|
for (var y = minY; y <= maxY; y++) {
|
|
if (y < y2) {
|
|
k = y < y1 ? 0 : y1 === y2 ? 1 : (y1 - y) / (y1 - y2);
|
|
xa = x1 - (x1 - x2) * k;
|
|
car = c1r - (c1r - c2r) * k;
|
|
cag = c1g - (c1g - c2g) * k;
|
|
cab = c1b - (c1b - c2b) * k;
|
|
} else {
|
|
k = y > y3 ? 1 : y2 === y3 ? 0 : (y2 - y) / (y2 - y3);
|
|
xa = x2 - (x2 - x3) * k;
|
|
car = c2r - (c2r - c3r) * k;
|
|
cag = c2g - (c2g - c3g) * k;
|
|
cab = c2b - (c2b - c3b) * k;
|
|
}
|
|
k = y < y1 ? 0 : y > y3 ? 1 : (y1 - y) / (y1 - y3);
|
|
xb = x1 - (x1 - x3) * k;
|
|
cbr = c1r - (c1r - c3r) * k;
|
|
cbg = c1g - (c1g - c3g) * k;
|
|
cbb = c1b - (c1b - c3b) * k;
|
|
var x1_ = Math.round(Math.min(xa, xb));
|
|
var x2_ = Math.round(Math.max(xa, xb));
|
|
var j = rowSize * y + x1_ * 4;
|
|
for (var x = x1_; x <= x2_; x++) {
|
|
k = (xa - x) / (xa - xb);
|
|
k = k < 0 ? 0 : k > 1 ? 1 : k;
|
|
bytes[j++] = (car - (car - cbr) * k) | 0;
|
|
bytes[j++] = (cag - (cag - cbg) * k) | 0;
|
|
bytes[j++] = (cab - (cab - cbb) * k) | 0;
|
|
bytes[j++] = 255;
|
|
}
|
|
}
|
|
}
|
|
|
|
function drawFigure(data, figure, context) {
|
|
var ps = figure.coords;
|
|
var cs = figure.colors;
|
|
var i, ii;
|
|
switch (figure.type) {
|
|
case 'lattice':
|
|
var verticesPerRow = figure.verticesPerRow;
|
|
var rows = Math.floor(ps.length / verticesPerRow) - 1;
|
|
var cols = verticesPerRow - 1;
|
|
for (i = 0; i < rows; i++) {
|
|
var q = i * verticesPerRow;
|
|
for (var j = 0; j < cols; j++, q++) {
|
|
drawTriangle(data, context,
|
|
ps[q], ps[q + 1], ps[q + verticesPerRow],
|
|
cs[q], cs[q + 1], cs[q + verticesPerRow]);
|
|
drawTriangle(data, context,
|
|
ps[q + verticesPerRow + 1], ps[q + 1], ps[q + verticesPerRow],
|
|
cs[q + verticesPerRow + 1], cs[q + 1], cs[q + verticesPerRow]);
|
|
}
|
|
}
|
|
break;
|
|
case 'triangles':
|
|
for (i = 0, ii = ps.length; i < ii; i += 3) {
|
|
drawTriangle(data, context,
|
|
ps[i], ps[i + 1], ps[i + 2],
|
|
cs[i], cs[i + 1], cs[i + 2]);
|
|
}
|
|
break;
|
|
default:
|
|
error('illigal figure');
|
|
break;
|
|
}
|
|
}
|
|
|
|
function createMeshCanvas(bounds, combinesScale, coords, colors, figures,
|
|
backgroundColor) {
|
|
// we will increase scale on some weird factor to let antialiasing take
|
|
// care of "rough" edges
|
|
var EXPECTED_SCALE = 1.1;
|
|
// MAX_PATTERN_SIZE is used to avoid OOM situation.
|
|
var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough
|
|
|
|
var offsetX = Math.floor(bounds[0]);
|
|
var offsetY = Math.floor(bounds[1]);
|
|
var boundsWidth = Math.ceil(bounds[2]) - offsetX;
|
|
var boundsHeight = Math.ceil(bounds[3]) - offsetY;
|
|
|
|
var width = Math.min(Math.ceil(Math.abs(boundsWidth * combinesScale[0] *
|
|
EXPECTED_SCALE)), MAX_PATTERN_SIZE);
|
|
var height = Math.min(Math.ceil(Math.abs(boundsHeight * combinesScale[1] *
|
|
EXPECTED_SCALE)), MAX_PATTERN_SIZE);
|
|
var scaleX = boundsWidth / width;
|
|
var scaleY = boundsHeight / height;
|
|
|
|
var context = {
|
|
coords: coords,
|
|
colors: colors,
|
|
offsetX: -offsetX,
|
|
offsetY: -offsetY,
|
|
scaleX: 1 / scaleX,
|
|
scaleY: 1 / scaleY
|
|
};
|
|
|
|
var canvas, tmpCanvas, i, ii;
|
|
if (WebGLUtils.isEnabled) {
|
|
canvas = WebGLUtils.drawFigures(width, height, backgroundColor,
|
|
figures, context);
|
|
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=972126
|
|
tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false);
|
|
tmpCanvas.context.drawImage(canvas, 0, 0);
|
|
canvas = tmpCanvas.canvas;
|
|
} else {
|
|
tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false);
|
|
var tmpCtx = tmpCanvas.context;
|
|
|
|
var data = tmpCtx.createImageData(width, height);
|
|
if (backgroundColor) {
|
|
var bytes = data.data;
|
|
for (i = 0, ii = bytes.length; i < ii; i += 4) {
|
|
bytes[i] = backgroundColor[0];
|
|
bytes[i + 1] = backgroundColor[1];
|
|
bytes[i + 2] = backgroundColor[2];
|
|
bytes[i + 3] = 255;
|
|
}
|
|
}
|
|
for (i = 0; i < figures.length; i++) {
|
|
drawFigure(data, figures[i], context);
|
|
}
|
|
tmpCtx.putImageData(data, 0, 0);
|
|
canvas = tmpCanvas.canvas;
|
|
}
|
|
|
|
return {canvas: canvas, offsetX: offsetX, offsetY: offsetY,
|
|
scaleX: scaleX, scaleY: scaleY};
|
|
}
|
|
return createMeshCanvas;
|
|
})();
|
|
|
|
ShadingIRs.Mesh = {
|
|
fromIR: function Mesh_fromIR(raw) {
|
|
//var type = raw[1];
|
|
var coords = raw[2];
|
|
var colors = raw[3];
|
|
var figures = raw[4];
|
|
var bounds = raw[5];
|
|
var matrix = raw[6];
|
|
//var bbox = raw[7];
|
|
var background = raw[8];
|
|
return {
|
|
type: 'Pattern',
|
|
getPattern: function Mesh_getPattern(ctx, owner, shadingFill) {
|
|
var scale;
|
|
if (shadingFill) {
|
|
scale = Util.singularValueDecompose2dScale(ctx.mozCurrentTransform);
|
|
} else {
|
|
// Obtain scale from matrix and current transformation matrix.
|
|
scale = Util.singularValueDecompose2dScale(owner.baseTransform);
|
|
if (matrix) {
|
|
var matrixScale = Util.singularValueDecompose2dScale(matrix);
|
|
scale = [scale[0] * matrixScale[0],
|
|
scale[1] * matrixScale[1]];
|
|
}
|
|
}
|
|
|
|
|
|
// Rasterizing on the main thread since sending/queue large canvases
|
|
// might cause OOM.
|
|
var temporaryPatternCanvas = createMeshCanvas(bounds, scale, coords,
|
|
colors, figures, shadingFill ? null : background);
|
|
|
|
if (!shadingFill) {
|
|
ctx.setTransform.apply(ctx, owner.baseTransform);
|
|
if (matrix) {
|
|
ctx.transform.apply(ctx, matrix);
|
|
}
|
|
}
|
|
|
|
ctx.translate(temporaryPatternCanvas.offsetX,
|
|
temporaryPatternCanvas.offsetY);
|
|
ctx.scale(temporaryPatternCanvas.scaleX,
|
|
temporaryPatternCanvas.scaleY);
|
|
|
|
return ctx.createPattern(temporaryPatternCanvas.canvas, 'no-repeat');
|
|
}
|
|
};
|
|
}
|
|
};
|
|
|
|
ShadingIRs.Dummy = {
|
|
fromIR: function Dummy_fromIR() {
|
|
return {
|
|
type: 'Pattern',
|
|
getPattern: function Dummy_fromIR_getPattern() {
|
|
return 'hotpink';
|
|
}
|
|
};
|
|
}
|
|
};
|
|
|
|
function getShadingPatternFromIR(raw) {
|
|
var shadingIR = ShadingIRs[raw[0]];
|
|
if (!shadingIR) {
|
|
error('Unknown IR type: ' + raw[0]);
|
|
}
|
|
return shadingIR.fromIR(raw);
|
|
}
|
|
|
|
var TilingPattern = (function TilingPatternClosure() {
|
|
var PaintType = {
|
|
COLORED: 1,
|
|
UNCOLORED: 2
|
|
};
|
|
|
|
var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough
|
|
|
|
function TilingPattern(IR, color, ctx, objs, commonObjs, baseTransform) {
|
|
this.operatorList = IR[2];
|
|
this.matrix = IR[3] || [1, 0, 0, 1, 0, 0];
|
|
this.bbox = IR[4];
|
|
this.xstep = IR[5];
|
|
this.ystep = IR[6];
|
|
this.paintType = IR[7];
|
|
this.tilingType = IR[8];
|
|
this.color = color;
|
|
this.objs = objs;
|
|
this.commonObjs = commonObjs;
|
|
this.baseTransform = baseTransform;
|
|
this.type = 'Pattern';
|
|
this.ctx = ctx;
|
|
}
|
|
|
|
TilingPattern.prototype = {
|
|
createPatternCanvas: function TilinPattern_createPatternCanvas(owner) {
|
|
var operatorList = this.operatorList;
|
|
var bbox = this.bbox;
|
|
var xstep = this.xstep;
|
|
var ystep = this.ystep;
|
|
var paintType = this.paintType;
|
|
var tilingType = this.tilingType;
|
|
var color = this.color;
|
|
var objs = this.objs;
|
|
var commonObjs = this.commonObjs;
|
|
|
|
info('TilingType: ' + tilingType);
|
|
|
|
var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3];
|
|
|
|
var topLeft = [x0, y0];
|
|
// we want the canvas to be as large as the step size
|
|
var botRight = [x0 + xstep, y0 + ystep];
|
|
|
|
var width = botRight[0] - topLeft[0];
|
|
var height = botRight[1] - topLeft[1];
|
|
|
|
// Obtain scale from matrix and current transformation matrix.
|
|
var matrixScale = Util.singularValueDecompose2dScale(this.matrix);
|
|
var curMatrixScale = Util.singularValueDecompose2dScale(
|
|
this.baseTransform);
|
|
var combinedScale = [matrixScale[0] * curMatrixScale[0],
|
|
matrixScale[1] * curMatrixScale[1]];
|
|
|
|
// MAX_PATTERN_SIZE is used to avoid OOM situation.
|
|
// Use width and height values that are as close as possible to the end
|
|
// result when the pattern is used. Too low value makes the pattern look
|
|
// blurry. Too large value makes it look too crispy.
|
|
width = Math.min(Math.ceil(Math.abs(width * combinedScale[0])),
|
|
MAX_PATTERN_SIZE);
|
|
|
|
height = Math.min(Math.ceil(Math.abs(height * combinedScale[1])),
|
|
MAX_PATTERN_SIZE);
|
|
|
|
var tmpCanvas = CachedCanvases.getCanvas('pattern', width, height, true);
|
|
var tmpCtx = tmpCanvas.context;
|
|
var graphics = new CanvasGraphics(tmpCtx, commonObjs, objs);
|
|
graphics.groupLevel = owner.groupLevel;
|
|
|
|
this.setFillAndStrokeStyleToContext(tmpCtx, paintType, color);
|
|
|
|
this.setScale(width, height, xstep, ystep);
|
|
this.transformToScale(graphics);
|
|
|
|
// transform coordinates to pattern space
|
|
var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]];
|
|
graphics.transform.apply(graphics, tmpTranslate);
|
|
|
|
this.clipBbox(graphics, bbox, x0, y0, x1, y1);
|
|
|
|
graphics.executeOperatorList(operatorList);
|
|
return tmpCanvas.canvas;
|
|
},
|
|
|
|
setScale: function TilingPattern_setScale(width, height, xstep, ystep) {
|
|
this.scale = [width / xstep, height / ystep];
|
|
},
|
|
|
|
transformToScale: function TilingPattern_transformToScale(graphics) {
|
|
var scale = this.scale;
|
|
var tmpScale = [scale[0], 0, 0, scale[1], 0, 0];
|
|
graphics.transform.apply(graphics, tmpScale);
|
|
},
|
|
|
|
scaleToContext: function TilingPattern_scaleToContext() {
|
|
var scale = this.scale;
|
|
this.ctx.scale(1 / scale[0], 1 / scale[1]);
|
|
},
|
|
|
|
clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) {
|
|
if (bbox && isArray(bbox) && bbox.length === 4) {
|
|
var bboxWidth = x1 - x0;
|
|
var bboxHeight = y1 - y0;
|
|
graphics.ctx.rect(x0, y0, bboxWidth, bboxHeight);
|
|
graphics.clip();
|
|
graphics.endPath();
|
|
}
|
|
},
|
|
|
|
setFillAndStrokeStyleToContext:
|
|
function setFillAndStrokeStyleToContext(context, paintType, color) {
|
|
switch (paintType) {
|
|
case PaintType.COLORED:
|
|
var ctx = this.ctx;
|
|
context.fillStyle = ctx.fillStyle;
|
|
context.strokeStyle = ctx.strokeStyle;
|
|
break;
|
|
case PaintType.UNCOLORED:
|
|
var cssColor = Util.makeCssRgb(color[0], color[1], color[2]);
|
|
context.fillStyle = cssColor;
|
|
context.strokeStyle = cssColor;
|
|
break;
|
|
default:
|
|
error('Unsupported paint type: ' + paintType);
|
|
}
|
|
},
|
|
|
|
getPattern: function TilingPattern_getPattern(ctx, owner) {
|
|
var temporaryPatternCanvas = this.createPatternCanvas(owner);
|
|
|
|
ctx = this.ctx;
|
|
ctx.setTransform.apply(ctx, this.baseTransform);
|
|
ctx.transform.apply(ctx, this.matrix);
|
|
this.scaleToContext();
|
|
|
|
return ctx.createPattern(temporaryPatternCanvas, 'repeat');
|
|
}
|
|
};
|
|
|
|
return TilingPattern;
|
|
})();
|
|
|
|
|
|
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);
|
|
}
|
|
//#if !(MOZCENTRAL)
|
|
this.nativeFontFaces.forEach(function(nativeFontFace) {
|
|
document.fonts.delete(nativeFontFace);
|
|
});
|
|
this.nativeFontFaces.length = 0;
|
|
//#endif
|
|
},
|
|
//#if !(MOZCENTRAL)
|
|
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
|
|
if (userAgent === 'node') {
|
|
return true;
|
|
}
|
|
return false;
|
|
})(),
|
|
|
|
nativeFontFaces: [],
|
|
|
|
isFontLoadingAPISupported: (!isWorker && typeof document !== 'undefined' &&
|
|
!!document.fonts),
|
|
|
|
addNativeFontFace: function fontLoader_addNativeFontFace(nativeFontFace) {
|
|
this.nativeFontFaces.push(nativeFontFace);
|
|
document.fonts.add(nativeFontFace);
|
|
},
|
|
|
|
bind: function fontLoaderBind(fonts, callback) {
|
|
assert(!isWorker, 'bind() shall be called from main thread');
|
|
|
|
var rules = [];
|
|
var fontsToLoad = [];
|
|
var fontLoadPromises = [];
|
|
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;
|
|
|
|
if (this.isFontLoadingAPISupported) {
|
|
var nativeFontFace = font.createNativeFontFace();
|
|
if (nativeFontFace) {
|
|
fontLoadPromises.push(nativeFontFace.loaded);
|
|
}
|
|
} else {
|
|
var rule = font.bindDOM();
|
|
if (rule) {
|
|
rules.push(rule);
|
|
fontsToLoad.push(font);
|
|
}
|
|
}
|
|
}
|
|
|
|
var request = FontLoader.queueLoadingCallback(callback);
|
|
if (this.isFontLoadingAPISupported) {
|
|
Promise.all(fontsToLoad).then(function() {
|
|
request.complete();
|
|
});
|
|
} else 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 spliceString(s, offset, remove, insert) {
|
|
var chunk1 = s.substr(0, offset);
|
|
var chunk2 = s.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 */
|
|
}
|
|
//#else
|
|
//bind: function fontLoaderBind(fonts, callback) {
|
|
// assert(!isWorker, 'bind() shall be called from main thread');
|
|
//
|
|
// for (var i = 0, ii = fonts.length; i < ii; i++) {
|
|
// var font = fonts[i];
|
|
// if (font.attached) {
|
|
// continue;
|
|
// }
|
|
//
|
|
// font.attached = true;
|
|
// font.bindDOM()
|
|
// }
|
|
//
|
|
// setTimeout(callback);
|
|
//}
|
|
//#endif
|
|
};
|
|
|
|
var FontFaceObject = (function FontFaceObjectClosure() {
|
|
function FontFaceObject(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;
|
|
}
|
|
}
|
|
FontFaceObject.prototype = {
|
|
//#if !(MOZCENTRAL)
|
|
createNativeFontFace: function FontFaceObject_createNativeFontFace() {
|
|
if (!this.data) {
|
|
return null;
|
|
}
|
|
|
|
if (PDFJS.disableFontFace) {
|
|
this.disableFontFace = true;
|
|
return null;
|
|
}
|
|
|
|
var nativeFontFace = new FontFace(this.loadedName, this.data, {});
|
|
|
|
FontLoader.addNativeFontFace(nativeFontFace);
|
|
|
|
if (PDFJS.pdfBug && 'FontInspector' in globalScope &&
|
|
globalScope['FontInspector'].enabled) {
|
|
globalScope['FontInspector'].fontAdded(this);
|
|
}
|
|
return nativeFontFace;
|
|
},
|
|
//#endif
|
|
|
|
bindDOM: function FontFaceObject_bindDOM() {
|
|
if (!this.data) {
|
|
return null;
|
|
}
|
|
|
|
if (PDFJS.disableFontFace) {
|
|
this.disableFontFace = true;
|
|
return null;
|
|
}
|
|
|
|
var data = bytesToString(new Uint8Array(this.data));
|
|
var fontName = this.loadedName;
|
|
|
|
// Add the font-face rule to the document
|
|
var url = ('url(data:' + this.mimetype + ';base64,' +
|
|
window.btoa(data) + ');');
|
|
var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}';
|
|
FontLoader.insertRule(rule);
|
|
|
|
if (PDFJS.pdfBug && 'FontInspector' in globalScope &&
|
|
globalScope['FontInspector'].enabled) {
|
|
globalScope['FontInspector'].fontAdded(this, url);
|
|
}
|
|
|
|
return rule;
|
|
},
|
|
|
|
getPathGenerator: function FontLoader_getPathGenerator(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 FontFaceObject;
|
|
})();
|
|
|
|
|
|
var ANNOT_MIN_SIZE = 10; // px
|
|
|
|
var AnnotationUtils = (function AnnotationUtilsClosure() {
|
|
// 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;
|
|
}
|
|
|
|
function initContainer(item, drawBorder) {
|
|
var container = document.createElement('section');
|
|
var cstyle = container.style;
|
|
var width = item.rect[2] - item.rect[0];
|
|
var height = item.rect[3] - item.rect[1];
|
|
|
|
var bWidth = item.borderWidth || 0;
|
|
if (bWidth) {
|
|
width = width - 2 * bWidth;
|
|
height = height - 2 * bWidth;
|
|
cstyle.borderWidth = bWidth + 'px';
|
|
var color = item.color;
|
|
if (drawBorder && color) {
|
|
cstyle.borderStyle = 'solid';
|
|
cstyle.borderColor = Util.makeCssRgb(Math.round(color[0] * 255),
|
|
Math.round(color[1] * 255),
|
|
Math.round(color[2] * 255));
|
|
}
|
|
}
|
|
cstyle.width = width + 'px';
|
|
cstyle.height = height + 'px';
|
|
return container;
|
|
}
|
|
|
|
function getHtmlElementForTextWidgetAnnotation(item, commonObjs) {
|
|
var element = document.createElement('div');
|
|
var width = item.rect[2] - item.rect[0];
|
|
var height = item.rect[3] - item.rect[1];
|
|
element.style.width = width + 'px';
|
|
element.style.height = height + 'px';
|
|
element.style.display = 'table';
|
|
|
|
var content = document.createElement('div');
|
|
content.textContent = item.fieldValue;
|
|
var textAlignment = item.textAlignment;
|
|
content.style.textAlign = ['left', 'center', 'right'][textAlignment];
|
|
content.style.verticalAlign = 'middle';
|
|
content.style.display = 'table-cell';
|
|
|
|
var fontObj = item.fontRefName ?
|
|
commonObjs.getData(item.fontRefName) : null;
|
|
setTextStyles(content, item, fontObj);
|
|
|
|
element.appendChild(content);
|
|
|
|
return element;
|
|
}
|
|
|
|
function getHtmlElementForTextAnnotation(item) {
|
|
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 = initContainer(item, false);
|
|
container.className = 'annotText';
|
|
|
|
var image = document.createElement('img');
|
|
image.style.height = container.style.height;
|
|
image.style.width = container.style.width;
|
|
var iconName = item.name;
|
|
image.src = PDFJS.imageResourcesPath + 'annotation-' +
|
|
iconName.toLowerCase() + '.svg';
|
|
image.alt = '[{{type}} Annotation]';
|
|
image.dataset.l10nId = 'text_annotation_type';
|
|
image.dataset.l10nArgs = JSON.stringify({type: iconName});
|
|
|
|
var contentWrapper = document.createElement('div');
|
|
contentWrapper.className = 'annotTextContentWrapper';
|
|
contentWrapper.style.left = Math.floor(rect[2] - rect[0] + 5) + 'px';
|
|
contentWrapper.style.top = '-10px';
|
|
|
|
var content = document.createElement('div');
|
|
content.className = 'annotTextContent';
|
|
content.setAttribute('hidden', true);
|
|
|
|
var i, ii;
|
|
if (item.hasBgColor) {
|
|
var color = item.color;
|
|
|
|
// Enlighten the color (70%)
|
|
var BACKGROUND_ENLIGHT = 0.7;
|
|
var r = BACKGROUND_ENLIGHT * (1.0 - color[0]) + color[0];
|
|
var g = BACKGROUND_ENLIGHT * (1.0 - color[1]) + color[1];
|
|
var b = BACKGROUND_ENLIGHT * (1.0 - color[2]) + color[2];
|
|
content.style.backgroundColor = Util.makeCssRgb((r * 255) | 0,
|
|
(g * 255) | 0,
|
|
(b * 255) | 0);
|
|
}
|
|
|
|
var title = document.createElement('h1');
|
|
var text = document.createElement('p');
|
|
title.textContent = item.title;
|
|
|
|
if (!item.content && !item.title) {
|
|
content.setAttribute('hidden', true);
|
|
} else {
|
|
var e = document.createElement('span');
|
|
var lines = item.content.split(/(?:\r\n?|\n)/);
|
|
for (i = 0, ii = lines.length; i < ii; ++i) {
|
|
var line = lines[i];
|
|
e.appendChild(document.createTextNode(line));
|
|
if (i < (ii - 1)) {
|
|
e.appendChild(document.createElement('br'));
|
|
}
|
|
}
|
|
text.appendChild(e);
|
|
|
|
var pinned = false;
|
|
|
|
var showAnnotation = function showAnnotation(pin) {
|
|
if (pin) {
|
|
pinned = true;
|
|
}
|
|
if (content.hasAttribute('hidden')) {
|
|
container.style.zIndex += 1;
|
|
content.removeAttribute('hidden');
|
|
}
|
|
};
|
|
|
|
var hideAnnotation = function hideAnnotation(unpin) {
|
|
if (unpin) {
|
|
pinned = false;
|
|
}
|
|
if (!content.hasAttribute('hidden') && !pinned) {
|
|
container.style.zIndex -= 1;
|
|
content.setAttribute('hidden', true);
|
|
}
|
|
};
|
|
|
|
var toggleAnnotation = function toggleAnnotation() {
|
|
if (pinned) {
|
|
hideAnnotation(true);
|
|
} else {
|
|
showAnnotation(true);
|
|
}
|
|
};
|
|
|
|
image.addEventListener('click', function image_clickHandler() {
|
|
toggleAnnotation();
|
|
}, false);
|
|
image.addEventListener('mouseover', function image_mouseOverHandler() {
|
|
showAnnotation();
|
|
}, false);
|
|
image.addEventListener('mouseout', function image_mouseOutHandler() {
|
|
hideAnnotation();
|
|
}, false);
|
|
|
|
content.addEventListener('click', function content_clickHandler() {
|
|
hideAnnotation(true);
|
|
}, false);
|
|
}
|
|
|
|
content.appendChild(title);
|
|
content.appendChild(text);
|
|
contentWrapper.appendChild(content);
|
|
container.appendChild(image);
|
|
container.appendChild(contentWrapper);
|
|
|
|
return container;
|
|
}
|
|
|
|
function getHtmlElementForLinkAnnotation(item) {
|
|
var container = initContainer(item, true);
|
|
container.className = 'annotLink';
|
|
|
|
var link = document.createElement('a');
|
|
link.href = link.title = item.url || '';
|
|
if (item.url && PDFJS.openExternalLinksInNewWindow) {
|
|
link.target = '_blank';
|
|
}
|
|
|
|
container.appendChild(link);
|
|
|
|
return container;
|
|
}
|
|
|
|
function getHtmlElement(data, objs) {
|
|
switch (data.annotationType) {
|
|
case AnnotationType.WIDGET:
|
|
return getHtmlElementForTextWidgetAnnotation(data, objs);
|
|
case AnnotationType.TEXT:
|
|
return getHtmlElementForTextAnnotation(data);
|
|
case AnnotationType.LINK:
|
|
return getHtmlElementForLinkAnnotation(data);
|
|
default:
|
|
throw new Error('Unsupported annotationType: ' + data.annotationType);
|
|
}
|
|
}
|
|
|
|
return {
|
|
getHtmlElement: getHtmlElement
|
|
};
|
|
})();
|
|
PDFJS.AnnotationUtils = AnnotationUtils;
|
|
|
|
|
|
//#if (GENERIC || SINGLE_FILE)
|
|
var SVG_DEFAULTS = {
|
|
fontStyle: 'normal',
|
|
fontWeight: 'normal',
|
|
fillColor: '#000000'
|
|
};
|
|
|
|
var convertImgDataToPng = (function convertImgDataToPngClosure() {
|
|
var PNG_HEADER =
|
|
new Uint8Array([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]);
|
|
|
|
var CHUNK_WRAPPER_SIZE = 12;
|
|
|
|
var crcTable = new Int32Array(256);
|
|
for (var i = 0; i < 256; i++) {
|
|
var c = i;
|
|
for (var h = 0; h < 8; h++) {
|
|
if (c & 1) {
|
|
c = 0xedB88320 ^ ((c >> 1) & 0x7fffffff);
|
|
} else {
|
|
c = (c >> 1) & 0x7fffffff;
|
|
}
|
|
}
|
|
crcTable[i] = c;
|
|
}
|
|
|
|
function crc32(data, start, end) {
|
|
var crc = -1;
|
|
for (var i = start; i < end; i++) {
|
|
var a = (crc ^ data[i]) & 0xff;
|
|
var b = crcTable[a];
|
|
crc = (crc >>> 8) ^ b;
|
|
}
|
|
return crc ^ -1;
|
|
}
|
|
|
|
function writePngChunk(type, body, data, offset) {
|
|
var p = offset;
|
|
var len = body.length;
|
|
|
|
data[p] = len >> 24 & 0xff;
|
|
data[p + 1] = len >> 16 & 0xff;
|
|
data[p + 2] = len >> 8 & 0xff;
|
|
data[p + 3] = len & 0xff;
|
|
p += 4;
|
|
|
|
data[p] = type.charCodeAt(0) & 0xff;
|
|
data[p + 1] = type.charCodeAt(1) & 0xff;
|
|
data[p + 2] = type.charCodeAt(2) & 0xff;
|
|
data[p + 3] = type.charCodeAt(3) & 0xff;
|
|
p += 4;
|
|
|
|
data.set(body, p);
|
|
p += body.length;
|
|
|
|
var crc = crc32(data, offset + 4, p);
|
|
|
|
data[p] = crc >> 24 & 0xff;
|
|
data[p + 1] = crc >> 16 & 0xff;
|
|
data[p + 2] = crc >> 8 & 0xff;
|
|
data[p + 3] = crc & 0xff;
|
|
}
|
|
|
|
function adler32(data, start, end) {
|
|
var a = 1;
|
|
var b = 0;
|
|
for (var i = start; i < end; ++i) {
|
|
a = (a + (data[i] & 0xff)) % 65521;
|
|
b = (b + a) % 65521;
|
|
}
|
|
return (b << 16) | a;
|
|
}
|
|
|
|
function encode(imgData, kind) {
|
|
var width = imgData.width;
|
|
var height = imgData.height;
|
|
var bitDepth, colorType, lineSize;
|
|
var bytes = imgData.data;
|
|
|
|
switch (kind) {
|
|
case ImageKind.GRAYSCALE_1BPP:
|
|
colorType = 0;
|
|
bitDepth = 1;
|
|
lineSize = (width + 7) >> 3;
|
|
break;
|
|
case ImageKind.RGB_24BPP:
|
|
colorType = 2;
|
|
bitDepth = 8;
|
|
lineSize = width * 3;
|
|
break;
|
|
case ImageKind.RGBA_32BPP:
|
|
colorType = 6;
|
|
bitDepth = 8;
|
|
lineSize = width * 4;
|
|
break;
|
|
default:
|
|
throw new Error('invalid format');
|
|
}
|
|
|
|
// prefix every row with predictor 0
|
|
var literals = new Uint8Array((1 + lineSize) * height);
|
|
var offsetLiterals = 0, offsetBytes = 0;
|
|
var y, i;
|
|
for (y = 0; y < height; ++y) {
|
|
literals[offsetLiterals++] = 0; // no prediction
|
|
literals.set(bytes.subarray(offsetBytes, offsetBytes + lineSize),
|
|
offsetLiterals);
|
|
offsetBytes += lineSize;
|
|
offsetLiterals += lineSize;
|
|
}
|
|
|
|
if (kind === ImageKind.GRAYSCALE_1BPP) {
|
|
// inverting for B/W
|
|
offsetLiterals = 0;
|
|
for (y = 0; y < height; y++) {
|
|
offsetLiterals++; // skipping predictor
|
|
for (i = 0; i < lineSize; i++) {
|
|
literals[offsetLiterals++] ^= 0xFF;
|
|
}
|
|
}
|
|
}
|
|
|
|
var ihdr = new Uint8Array([
|
|
width >> 24 & 0xff,
|
|
width >> 16 & 0xff,
|
|
width >> 8 & 0xff,
|
|
width & 0xff,
|
|
height >> 24 & 0xff,
|
|
height >> 16 & 0xff,
|
|
height >> 8 & 0xff,
|
|
height & 0xff,
|
|
bitDepth, // bit depth
|
|
colorType, // color type
|
|
0x00, // compression method
|
|
0x00, // filter method
|
|
0x00 // interlace method
|
|
]);
|
|
|
|
var len = literals.length;
|
|
var maxBlockLength = 0xFFFF;
|
|
|
|
var deflateBlocks = Math.ceil(len / maxBlockLength);
|
|
var idat = new Uint8Array(2 + len + deflateBlocks * 5 + 4);
|
|
var pi = 0;
|
|
idat[pi++] = 0x78; // compression method and flags
|
|
idat[pi++] = 0x9c; // flags
|
|
|
|
var pos = 0;
|
|
while (len > maxBlockLength) {
|
|
// writing non-final DEFLATE blocks type 0 and length of 65535
|
|
idat[pi++] = 0x00;
|
|
idat[pi++] = 0xff;
|
|
idat[pi++] = 0xff;
|
|
idat[pi++] = 0x00;
|
|
idat[pi++] = 0x00;
|
|
idat.set(literals.subarray(pos, pos + maxBlockLength), pi);
|
|
pi += maxBlockLength;
|
|
pos += maxBlockLength;
|
|
len -= maxBlockLength;
|
|
}
|
|
|
|
// writing non-final DEFLATE blocks type 0
|
|
idat[pi++] = 0x01;
|
|
idat[pi++] = len & 0xff;
|
|
idat[pi++] = len >> 8 & 0xff;
|
|
idat[pi++] = (~len & 0xffff) & 0xff;
|
|
idat[pi++] = (~len & 0xffff) >> 8 & 0xff;
|
|
idat.set(literals.subarray(pos), pi);
|
|
pi += literals.length - pos;
|
|
|
|
var adler = adler32(literals, 0, literals.length); // checksum
|
|
idat[pi++] = adler >> 24 & 0xff;
|
|
idat[pi++] = adler >> 16 & 0xff;
|
|
idat[pi++] = adler >> 8 & 0xff;
|
|
idat[pi++] = adler & 0xff;
|
|
|
|
// PNG will consists: header, IHDR+data, IDAT+data, and IEND.
|
|
var pngLength = PNG_HEADER.length + (CHUNK_WRAPPER_SIZE * 3) +
|
|
ihdr.length + idat.length;
|
|
var data = new Uint8Array(pngLength);
|
|
var offset = 0;
|
|
data.set(PNG_HEADER, offset);
|
|
offset += PNG_HEADER.length;
|
|
writePngChunk('IHDR', ihdr, data, offset);
|
|
offset += CHUNK_WRAPPER_SIZE + ihdr.length;
|
|
writePngChunk('IDATA', idat, data, offset);
|
|
offset += CHUNK_WRAPPER_SIZE + idat.length;
|
|
writePngChunk('IEND', new Uint8Array(0), data, offset);
|
|
|
|
return PDFJS.createObjectURL(data, 'image/png');
|
|
}
|
|
|
|
return function convertImgDataToPng(imgData) {
|
|
var kind = (imgData.kind === undefined ?
|
|
ImageKind.GRAYSCALE_1BPP : imgData.kind);
|
|
return encode(imgData, kind);
|
|
};
|
|
})();
|
|
|
|
var SVGExtraState = (function SVGExtraStateClosure() {
|
|
function SVGExtraState() {
|
|
this.fontSizeScale = 1;
|
|
this.fontWeight = SVG_DEFAULTS.fontWeight;
|
|
this.fontSize = 0;
|
|
|
|
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.textRise = 0;
|
|
|
|
// Default foreground and background colors
|
|
this.fillColor = SVG_DEFAULTS.fillColor;
|
|
this.strokeColor = '#000000';
|
|
|
|
this.fillAlpha = 1;
|
|
this.strokeAlpha = 1;
|
|
this.lineWidth = 1;
|
|
this.lineJoin = '';
|
|
this.lineCap = '';
|
|
this.miterLimit = 0;
|
|
|
|
this.dashArray = [];
|
|
this.dashPhase = 0;
|
|
|
|
this.dependencies = [];
|
|
|
|
// Clipping
|
|
this.clipId = '';
|
|
this.pendingClip = false;
|
|
|
|
this.maskId = '';
|
|
}
|
|
|
|
SVGExtraState.prototype = {
|
|
clone: function SVGExtraState_clone() {
|
|
return Object.create(this);
|
|
},
|
|
setCurrentPoint: function SVGExtraState_setCurrentPoint(x, y) {
|
|
this.x = x;
|
|
this.y = y;
|
|
}
|
|
};
|
|
return SVGExtraState;
|
|
})();
|
|
|
|
var SVGGraphics = (function SVGGraphicsClosure() {
|
|
function createScratchSVG(width, height) {
|
|
var NS = 'http://www.w3.org/2000/svg';
|
|
var svg = document.createElementNS(NS, 'svg:svg');
|
|
svg.setAttributeNS(null, 'version', '1.1');
|
|
svg.setAttributeNS(null, 'width', width + 'px');
|
|
svg.setAttributeNS(null, 'height', height + 'px');
|
|
svg.setAttributeNS(null, 'viewBox', '0 0 ' + width + ' ' + height);
|
|
return svg;
|
|
}
|
|
|
|
function opListToTree(opList) {
|
|
var opTree = [];
|
|
var tmp = [];
|
|
var opListLen = opList.length;
|
|
|
|
for (var x = 0; x < opListLen; x++) {
|
|
if (opList[x].fn === 'save') {
|
|
opTree.push({'fnId': 92, 'fn': 'group', 'items': []});
|
|
tmp.push(opTree);
|
|
opTree = opTree[opTree.length - 1].items;
|
|
continue;
|
|
}
|
|
|
|
if(opList[x].fn === 'restore') {
|
|
opTree = tmp.pop();
|
|
} else {
|
|
opTree.push(opList[x]);
|
|
}
|
|
}
|
|
return opTree;
|
|
}
|
|
|
|
/**
|
|
* Formats float number.
|
|
* @param value {number} number to format.
|
|
* @returns {string}
|
|
*/
|
|
function pf(value) {
|
|
if (value === (value | 0)) { // integer number
|
|
return value.toString();
|
|
}
|
|
var s = value.toFixed(10);
|
|
var i = s.length - 1;
|
|
if (s[i] !== '0') {
|
|
return s;
|
|
}
|
|
// removing trailing zeros
|
|
do {
|
|
i--;
|
|
} while (s[i] === '0');
|
|
return s.substr(0, s[i] === '.' ? i : i + 1);
|
|
}
|
|
|
|
/**
|
|
* Formats transform matrix. The standard rotation, scale and translate
|
|
* matrices are replaced by their shorter forms, and for identity matrix
|
|
* returns empty string to save the memory.
|
|
* @param m {Array} matrix to format.
|
|
* @returns {string}
|
|
*/
|
|
function pm(m) {
|
|
if (m[4] === 0 && m[5] === 0) {
|
|
if (m[1] === 0 && m[2] === 0) {
|
|
if (m[0] === 1 && m[3] === 1) {
|
|
return '';
|
|
}
|
|
return 'scale(' + pf(m[0]) + ' ' + pf(m[3]) + ')';
|
|
}
|
|
if (m[0] === m[3] && m[1] === -m[2]) {
|
|
var a = Math.acos(m[0]) * 180 / Math.PI;
|
|
return 'rotate(' + pf(a) + ')';
|
|
}
|
|
} else {
|
|
if (m[0] === 1 && m[1] === 0 && m[2] === 0 && m[3] === 1) {
|
|
return 'translate(' + pf(m[4]) + ' ' + pf(m[5]) + ')';
|
|
}
|
|
}
|
|
return 'matrix(' + pf(m[0]) + ' ' + pf(m[1]) + ' ' + pf(m[2]) + ' ' +
|
|
pf(m[3]) + ' ' + pf(m[4]) + ' ' + pf(m[5]) + ')';
|
|
}
|
|
|
|
function SVGGraphics(commonObjs, objs) {
|
|
this.current = new SVGExtraState();
|
|
this.transformMatrix = IDENTITY_MATRIX; // Graphics state matrix
|
|
this.transformStack = [];
|
|
this.extraStack = [];
|
|
this.commonObjs = commonObjs;
|
|
this.objs = objs;
|
|
this.pendingEOFill = false;
|
|
|
|
this.embedFonts = false;
|
|
this.embeddedFonts = {};
|
|
this.cssStyle = null;
|
|
}
|
|
|
|
var NS = 'http://www.w3.org/2000/svg';
|
|
var XML_NS = 'http://www.w3.org/XML/1998/namespace';
|
|
var XLINK_NS = 'http://www.w3.org/1999/xlink';
|
|
var LINE_CAP_STYLES = ['butt', 'round', 'square'];
|
|
var LINE_JOIN_STYLES = ['miter', 'round', 'bevel'];
|
|
var clipCount = 0;
|
|
var maskCount = 0;
|
|
|
|
SVGGraphics.prototype = {
|
|
save: function SVGGraphics_save() {
|
|
this.transformStack.push(this.transformMatrix);
|
|
var old = this.current;
|
|
this.extraStack.push(old);
|
|
this.current = old.clone();
|
|
},
|
|
|
|
restore: function SVGGraphics_restore() {
|
|
this.transformMatrix = this.transformStack.pop();
|
|
this.current = this.extraStack.pop();
|
|
|
|
this.tgrp = document.createElementNS(NS, 'svg:g');
|
|
this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
|
|
this.pgrp.appendChild(this.tgrp);
|
|
},
|
|
|
|
group: function SVGGraphics_group(items) {
|
|
this.save();
|
|
this.executeOpTree(items);
|
|
this.restore();
|
|
},
|
|
|
|
loadDependencies: function SVGGraphics_loadDependencies(operatorList) {
|
|
var fnArray = operatorList.fnArray;
|
|
var fnArrayLen = fnArray.length;
|
|
var argsArray = operatorList.argsArray;
|
|
|
|
var self = this;
|
|
for (var i = 0; i < fnArrayLen; i++) {
|
|
if (OPS.dependency === fnArray[i]) {
|
|
var deps = argsArray[i];
|
|
for (var n = 0, nn = deps.length; n < nn; n++) {
|
|
var obj = deps[n];
|
|
var common = obj.substring(0, 2) === 'g_';
|
|
var promise;
|
|
if (common) {
|
|
promise = new Promise(function(resolve) {
|
|
self.commonObjs.get(obj, resolve);
|
|
});
|
|
} else {
|
|
promise = new Promise(function(resolve) {
|
|
self.objs.get(obj, resolve);
|
|
});
|
|
}
|
|
this.current.dependencies.push(promise);
|
|
}
|
|
}
|
|
}
|
|
return Promise.all(this.current.dependencies);
|
|
},
|
|
|
|
transform: function SVGGraphics_transform(a, b, c, d, e, f) {
|
|
var transformMatrix = [a, b, c, d, e, f];
|
|
this.transformMatrix = PDFJS.Util.transform(this.transformMatrix,
|
|
transformMatrix);
|
|
|
|
this.tgrp = document.createElementNS(NS, 'svg:g');
|
|
this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
|
|
},
|
|
|
|
getSVG: function SVGGraphics_getSVG(operatorList, viewport) {
|
|
this.svg = createScratchSVG(viewport.width, viewport.height);
|
|
this.viewport = viewport;
|
|
|
|
return this.loadDependencies(operatorList).then(function () {
|
|
this.transformMatrix = IDENTITY_MATRIX;
|
|
this.pgrp = document.createElementNS(NS, 'svg:g'); // Parent group
|
|
this.pgrp.setAttributeNS(null, 'transform', pm(viewport.transform));
|
|
this.tgrp = document.createElementNS(NS, 'svg:g'); // Transform group
|
|
this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
|
|
this.defs = document.createElementNS(NS, 'svg:defs');
|
|
this.pgrp.appendChild(this.defs);
|
|
this.pgrp.appendChild(this.tgrp);
|
|
this.svg.appendChild(this.pgrp);
|
|
var opTree = this.convertOpList(operatorList);
|
|
this.executeOpTree(opTree);
|
|
return this.svg;
|
|
}.bind(this));
|
|
},
|
|
|
|
convertOpList: function SVGGraphics_convertOpList(operatorList) {
|
|
var argsArray = operatorList.argsArray;
|
|
var fnArray = operatorList.fnArray;
|
|
var fnArrayLen = fnArray.length;
|
|
var REVOPS = [];
|
|
var opList = [];
|
|
|
|
for (var op in OPS) {
|
|
REVOPS[OPS[op]] = op;
|
|
}
|
|
|
|
for (var x = 0; x < fnArrayLen; x++) {
|
|
var fnId = fnArray[x];
|
|
opList.push({'fnId' : fnId, 'fn': REVOPS[fnId], 'args': argsArray[x]});
|
|
}
|
|
return opListToTree(opList);
|
|
},
|
|
|
|
executeOpTree: function SVGGraphics_executeOpTree(opTree) {
|
|
var opTreeLen = opTree.length;
|
|
for(var x = 0; x < opTreeLen; x++) {
|
|
var fn = opTree[x].fn;
|
|
var fnId = opTree[x].fnId;
|
|
var args = opTree[x].args;
|
|
|
|
switch (fnId | 0) {
|
|
case OPS.beginText:
|
|
this.beginText();
|
|
break;
|
|
case OPS.setLeading:
|
|
this.setLeading(args);
|
|
break;
|
|
case OPS.setLeadingMoveText:
|
|
this.setLeadingMoveText(args[0], args[1]);
|
|
break;
|
|
case OPS.setFont:
|
|
this.setFont(args);
|
|
break;
|
|
case OPS.showText:
|
|
this.showText(args[0]);
|
|
break;
|
|
case OPS.showSpacedText:
|
|
this.showText(args[0]);
|
|
break;
|
|
case OPS.endText:
|
|
this.endText();
|
|
break;
|
|
case OPS.moveText:
|
|
this.moveText(args[0], args[1]);
|
|
break;
|
|
case OPS.setCharSpacing:
|
|
this.setCharSpacing(args[0]);
|
|
break;
|
|
case OPS.setWordSpacing:
|
|
this.setWordSpacing(args[0]);
|
|
break;
|
|
case OPS.setHScale:
|
|
this.setHScale(args[0]);
|
|
break;
|
|
case OPS.setTextMatrix:
|
|
this.setTextMatrix(args[0], args[1], args[2],
|
|
args[3], args[4], args[5]);
|
|
break;
|
|
case OPS.setLineWidth:
|
|
this.setLineWidth(args[0]);
|
|
break;
|
|
case OPS.setLineJoin:
|
|
this.setLineJoin(args[0]);
|
|
break;
|
|
case OPS.setLineCap:
|
|
this.setLineCap(args[0]);
|
|
break;
|
|
case OPS.setMiterLimit:
|
|
this.setMiterLimit(args[0]);
|
|
break;
|
|
case OPS.setFillRGBColor:
|
|
this.setFillRGBColor(args[0], args[1], args[2]);
|
|
break;
|
|
case OPS.setStrokeRGBColor:
|
|
this.setStrokeRGBColor(args[0], args[1], args[2]);
|
|
break;
|
|
case OPS.setDash:
|
|
this.setDash(args[0], args[1]);
|
|
break;
|
|
case OPS.setGState:
|
|
this.setGState(args[0]);
|
|
break;
|
|
case OPS.fill:
|
|
this.fill();
|
|
break;
|
|
case OPS.eoFill:
|
|
this.eoFill();
|
|
break;
|
|
case OPS.stroke:
|
|
this.stroke();
|
|
break;
|
|
case OPS.fillStroke:
|
|
this.fillStroke();
|
|
break;
|
|
case OPS.eoFillStroke:
|
|
this.eoFillStroke();
|
|
break;
|
|
case OPS.clip:
|
|
this.clip('nonzero');
|
|
break;
|
|
case OPS.eoClip:
|
|
this.clip('evenodd');
|
|
break;
|
|
case OPS.paintSolidColorImageMask:
|
|
this.paintSolidColorImageMask();
|
|
break;
|
|
case OPS.paintJpegXObject:
|
|
this.paintJpegXObject(args[0], args[1], args[2]);
|
|
break;
|
|
case OPS.paintImageXObject:
|
|
this.paintImageXObject(args[0]);
|
|
break;
|
|
case OPS.paintInlineImageXObject:
|
|
this.paintInlineImageXObject(args[0]);
|
|
break;
|
|
case OPS.paintImageMaskXObject:
|
|
this.paintImageMaskXObject(args[0]);
|
|
break;
|
|
case OPS.paintFormXObjectBegin:
|
|
this.paintFormXObjectBegin(args[0], args[1]);
|
|
break;
|
|
case OPS.paintFormXObjectEnd:
|
|
this.paintFormXObjectEnd();
|
|
break;
|
|
case OPS.closePath:
|
|
this.closePath();
|
|
break;
|
|
case OPS.closeStroke:
|
|
this.closeStroke();
|
|
break;
|
|
case OPS.closeFillStroke:
|
|
this.closeFillStroke();
|
|
break;
|
|
case OPS.nextLine:
|
|
this.nextLine();
|
|
break;
|
|
case OPS.transform:
|
|
this.transform(args[0], args[1], args[2], args[3],
|
|
args[4], args[5]);
|
|
break;
|
|
case OPS.constructPath:
|
|
this.constructPath(args[0], args[1]);
|
|
break;
|
|
case OPS.endPath:
|
|
this.endPath();
|
|
break;
|
|
case 92:
|
|
this.group(opTree[x].items);
|
|
break;
|
|
default:
|
|
warn('Unimplemented method '+ fn);
|
|
break;
|
|
}
|
|
}
|
|
},
|
|
|
|
setWordSpacing: function SVGGraphics_setWordSpacing(wordSpacing) {
|
|
this.current.wordSpacing = wordSpacing;
|
|
},
|
|
|
|
setCharSpacing: function SVGGraphics_setCharSpacing(charSpacing) {
|
|
this.current.charSpacing = charSpacing;
|
|
},
|
|
|
|
nextLine: function SVGGraphics_nextLine() {
|
|
this.moveText(0, this.current.leading);
|
|
},
|
|
|
|
setTextMatrix: function SVGGraphics_setTextMatrix(a, b, c, d, e, f) {
|
|
var current = this.current;
|
|
this.current.textMatrix = this.current.lineMatrix = [a, b, c, d, e, f];
|
|
|
|
this.current.x = this.current.lineX = 0;
|
|
this.current.y = this.current.lineY = 0;
|
|
|
|
current.xcoords = [];
|
|
current.tspan = document.createElementNS(NS, 'svg:tspan');
|
|
current.tspan.setAttributeNS(null, 'font-family', current.fontFamily);
|
|
current.tspan.setAttributeNS(null, 'font-size',
|
|
pf(current.fontSize) + 'px');
|
|
current.tspan.setAttributeNS(null, 'y', pf(-current.y));
|
|
|
|
current.txtElement = document.createElementNS(NS, 'svg:text');
|
|
current.txtElement.appendChild(current.tspan);
|
|
},
|
|
|
|
beginText: function SVGGraphics_beginText() {
|
|
this.current.x = this.current.lineX = 0;
|
|
this.current.y = this.current.lineY = 0;
|
|
this.current.textMatrix = IDENTITY_MATRIX;
|
|
this.current.lineMatrix = IDENTITY_MATRIX;
|
|
this.current.tspan = document.createElementNS(NS, 'svg:tspan');
|
|
this.current.txtElement = document.createElementNS(NS, 'svg:text');
|
|
this.current.txtgrp = document.createElementNS(NS, 'svg:g');
|
|
this.current.xcoords = [];
|
|
},
|
|
|
|
moveText: function SVGGraphics_moveText(x, y) {
|
|
var current = this.current;
|
|
this.current.x = this.current.lineX += x;
|
|
this.current.y = this.current.lineY += y;
|
|
|
|
current.xcoords = [];
|
|
current.tspan = document.createElementNS(NS, 'svg:tspan');
|
|
current.tspan.setAttributeNS(null, 'font-family', current.fontFamily);
|
|
current.tspan.setAttributeNS(null, 'font-size',
|
|
pf(current.fontSize) + 'px');
|
|
current.tspan.setAttributeNS(null, 'y', pf(-current.y));
|
|
},
|
|
|
|
showText: function SVGGraphics_showText(glyphs) {
|
|
var current = this.current;
|
|
var font = current.font;
|
|
var fontSize = current.fontSize;
|
|
|
|
if (fontSize === 0) {
|
|
return;
|
|
}
|
|
|
|
var charSpacing = current.charSpacing;
|
|
var wordSpacing = current.wordSpacing;
|
|
var fontDirection = current.fontDirection;
|
|
var textHScale = current.textHScale * fontDirection;
|
|
var glyphsLength = glyphs.length;
|
|
var vertical = font.vertical;
|
|
var widthAdvanceScale = fontSize * current.fontMatrix[0];
|
|
|
|
var x = 0, i;
|
|
for (i = 0; i < glyphsLength; ++i) {
|
|
var glyph = glyphs[i];
|
|
if (glyph === null) {
|
|
// word break
|
|
x += fontDirection * wordSpacing;
|
|
continue;
|
|
} else if (isNum(glyph)) {
|
|
x += -glyph * fontSize * 0.001;
|
|
continue;
|
|
}
|
|
current.xcoords.push(current.x + x * textHScale);
|
|
|
|
var width = glyph.width;
|
|
var character = glyph.fontChar;
|
|
var charWidth = width * widthAdvanceScale + charSpacing * fontDirection;
|
|
x += charWidth;
|
|
|
|
current.tspan.textContent += character;
|
|
}
|
|
if (vertical) {
|
|
current.y -= x * textHScale;
|
|
} else {
|
|
current.x += x * textHScale;
|
|
}
|
|
|
|
current.tspan.setAttributeNS(null, 'x',
|
|
current.xcoords.map(pf).join(' '));
|
|
current.tspan.setAttributeNS(null, 'y', pf(-current.y));
|
|
current.tspan.setAttributeNS(null, 'font-family', current.fontFamily);
|
|
current.tspan.setAttributeNS(null, 'font-size',
|
|
pf(current.fontSize) + 'px');
|
|
if (current.fontStyle !== SVG_DEFAULTS.fontStyle) {
|
|
current.tspan.setAttributeNS(null, 'font-style', current.fontStyle);
|
|
}
|
|
if (current.fontWeight !== SVG_DEFAULTS.fontWeight) {
|
|
current.tspan.setAttributeNS(null, 'font-weight', current.fontWeight);
|
|
}
|
|
if (current.fillColor !== SVG_DEFAULTS.fillColor) {
|
|
current.tspan.setAttributeNS(null, 'fill', current.fillColor);
|
|
}
|
|
|
|
current.txtElement.setAttributeNS(null, 'transform',
|
|
pm(current.textMatrix) +
|
|
' scale(1, -1)' );
|
|
current.txtElement.setAttributeNS(XML_NS, 'xml:space', 'preserve');
|
|
current.txtElement.appendChild(current.tspan);
|
|
current.txtgrp.appendChild(current.txtElement);
|
|
|
|
this.tgrp.appendChild(current.txtElement);
|
|
|
|
},
|
|
|
|
setLeadingMoveText: function SVGGraphics_setLeadingMoveText(x, y) {
|
|
this.setLeading(-y);
|
|
this.moveText(x, y);
|
|
},
|
|
|
|
addFontStyle: function SVGGraphics_addFontStyle(fontObj) {
|
|
if (!this.cssStyle) {
|
|
this.cssStyle = document.createElementNS(NS, 'svg:style');
|
|
this.cssStyle.setAttributeNS(null, 'type', 'text/css');
|
|
this.defs.appendChild(this.cssStyle);
|
|
}
|
|
|
|
var url = PDFJS.createObjectURL(fontObj.data, fontObj.mimetype);
|
|
this.cssStyle.textContent +=
|
|
'@font-face { font-family: "' + fontObj.loadedName + '";' +
|
|
' src: url(' + url + '); }\n';
|
|
},
|
|
|
|
setFont: function SVGGraphics_setFont(details) {
|
|
var current = this.current;
|
|
var fontObj = this.commonObjs.get(details[0]);
|
|
var size = details[1];
|
|
this.current.font = fontObj;
|
|
|
|
if (this.embedFonts && fontObj.data &&
|
|
!this.embeddedFonts[fontObj.loadedName]) {
|
|
this.addFontStyle(fontObj);
|
|
this.embeddedFonts[fontObj.loadedName] = fontObj;
|
|
}
|
|
|
|
current.fontMatrix = (fontObj.fontMatrix ?
|
|
fontObj.fontMatrix : FONT_IDENTITY_MATRIX);
|
|
|
|
var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') :
|
|
(fontObj.bold ? 'bold' : 'normal');
|
|
var italic = fontObj.italic ? 'italic' : 'normal';
|
|
|
|
if (size < 0) {
|
|
size = -size;
|
|
current.fontDirection = -1;
|
|
} else {
|
|
current.fontDirection = 1;
|
|
}
|
|
current.fontSize = size;
|
|
current.fontFamily = fontObj.loadedName;
|
|
current.fontWeight = bold;
|
|
current.fontStyle = italic;
|
|
|
|
current.tspan = document.createElementNS(NS, 'svg:tspan');
|
|
current.tspan.setAttributeNS(null, 'y', pf(-current.y));
|
|
current.xcoords = [];
|
|
},
|
|
|
|
endText: function SVGGraphics_endText() {
|
|
if (this.current.pendingClip) {
|
|
this.cgrp.appendChild(this.tgrp);
|
|
this.pgrp.appendChild(this.cgrp);
|
|
} else {
|
|
this.pgrp.appendChild(this.tgrp);
|
|
}
|
|
this.tgrp = document.createElementNS(NS, 'svg:g');
|
|
this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
|
|
},
|
|
|
|
// Path properties
|
|
setLineWidth: function SVGGraphics_setLineWidth(width) {
|
|
this.current.lineWidth = width;
|
|
},
|
|
setLineCap: function SVGGraphics_setLineCap(style) {
|
|
this.current.lineCap = LINE_CAP_STYLES[style];
|
|
},
|
|
setLineJoin: function SVGGraphics_setLineJoin(style) {
|
|
this.current.lineJoin = LINE_JOIN_STYLES[style];
|
|
},
|
|
setMiterLimit: function SVGGraphics_setMiterLimit(limit) {
|
|
this.current.miterLimit = limit;
|
|
},
|
|
setStrokeRGBColor: function SVGGraphics_setStrokeRGBColor(r, g, b) {
|
|
var color = Util.makeCssRgb(r, g, b);
|
|
this.current.strokeColor = color;
|
|
},
|
|
setFillRGBColor: function SVGGraphics_setFillRGBColor(r, g, b) {
|
|
var color = Util.makeCssRgb(r, g, b);
|
|
this.current.fillColor = color;
|
|
this.current.tspan = document.createElementNS(NS, 'svg:tspan');
|
|
this.current.xcoords = [];
|
|
},
|
|
setDash: function SVGGraphics_setDash(dashArray, dashPhase) {
|
|
this.current.dashArray = dashArray;
|
|
this.current.dashPhase = dashPhase;
|
|
},
|
|
|
|
constructPath: function SVGGraphics_constructPath(ops, args) {
|
|
var current = this.current;
|
|
var x = current.x, y = current.y;
|
|
current.path = document.createElementNS(NS, 'svg:path');
|
|
var d = [];
|
|
var opLength = ops.length;
|
|
|
|
for (var i = 0, j = 0; i < opLength; i++) {
|
|
switch (ops[i] | 0) {
|
|
case OPS.rectangle:
|
|
x = args[j++];
|
|
y = args[j++];
|
|
var width = args[j++];
|
|
var height = args[j++];
|
|
var xw = x + width;
|
|
var yh = y + height;
|
|
d.push('M', pf(x), pf(y), 'L', pf(xw) , pf(y), 'L', pf(xw), pf(yh),
|
|
'L', pf(x), pf(yh), 'Z');
|
|
break;
|
|
case OPS.moveTo:
|
|
x = args[j++];
|
|
y = args[j++];
|
|
d.push('M', pf(x), pf(y));
|
|
break;
|
|
case OPS.lineTo:
|
|
x = args[j++];
|
|
y = args[j++];
|
|
d.push('L', pf(x) , pf(y));
|
|
break;
|
|
case OPS.curveTo:
|
|
x = args[j + 4];
|
|
y = args[j + 5];
|
|
d.push('C', pf(args[j]), pf(args[j + 1]), pf(args[j + 2]),
|
|
pf(args[j + 3]), pf(x), pf(y));
|
|
j += 6;
|
|
break;
|
|
case OPS.curveTo2:
|
|
x = args[j + 2];
|
|
y = args[j + 3];
|
|
d.push('C', pf(x), pf(y), pf(args[j]), pf(args[j + 1]),
|
|
pf(args[j + 2]), pf(args[j + 3]));
|
|
j += 4;
|
|
break;
|
|
case OPS.curveTo3:
|
|
x = args[j + 2];
|
|
y = args[j + 3];
|
|
d.push('C', pf(args[j]), pf(args[j + 1]), pf(x), pf(y),
|
|
pf(x), pf(y));
|
|
j += 4;
|
|
break;
|
|
case OPS.closePath:
|
|
d.push('Z');
|
|
break;
|
|
}
|
|
}
|
|
current.path.setAttributeNS(null, 'd', d.join(' '));
|
|
current.path.setAttributeNS(null, 'stroke-miterlimit',
|
|
pf(current.miterLimit));
|
|
current.path.setAttributeNS(null, 'stroke-linecap', current.lineCap);
|
|
current.path.setAttributeNS(null, 'stroke-linejoin', current.lineJoin);
|
|
current.path.setAttributeNS(null, 'stroke-width',
|
|
pf(current.lineWidth) + 'px');
|
|
current.path.setAttributeNS(null, 'stroke-dasharray',
|
|
current.dashArray.map(pf).join(' '));
|
|
current.path.setAttributeNS(null, 'stroke-dashoffset',
|
|
pf(current.dashPhase) + 'px');
|
|
current.path.setAttributeNS(null, 'fill', 'none');
|
|
|
|
this.tgrp.appendChild(current.path);
|
|
if (current.pendingClip) {
|
|
this.cgrp.appendChild(this.tgrp);
|
|
this.pgrp.appendChild(this.cgrp);
|
|
} else {
|
|
this.pgrp.appendChild(this.tgrp);
|
|
}
|
|
// Saving a reference in current.element so that it can be addressed
|
|
// in 'fill' and 'stroke'
|
|
current.element = current.path;
|
|
current.setCurrentPoint(x, y);
|
|
},
|
|
|
|
endPath: function SVGGraphics_endPath() {
|
|
var current = this.current;
|
|
if (current.pendingClip) {
|
|
this.cgrp.appendChild(this.tgrp);
|
|
this.pgrp.appendChild(this.cgrp);
|
|
} else {
|
|
this.pgrp.appendChild(this.tgrp);
|
|
}
|
|
this.tgrp = document.createElementNS(NS, 'svg:g');
|
|
this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
|
|
},
|
|
|
|
clip: function SVGGraphics_clip(type) {
|
|
var current = this.current;
|
|
// Add current path to clipping path
|
|
current.clipId = 'clippath' + clipCount;
|
|
clipCount++;
|
|
this.clippath = document.createElementNS(NS, 'svg:clipPath');
|
|
this.clippath.setAttributeNS(null, 'id', current.clipId);
|
|
var clipElement = current.element.cloneNode();
|
|
if (type === 'evenodd') {
|
|
clipElement.setAttributeNS(null, 'clip-rule', 'evenodd');
|
|
} else {
|
|
clipElement.setAttributeNS(null, 'clip-rule', 'nonzero');
|
|
}
|
|
this.clippath.setAttributeNS(null, 'transform', pm(this.transformMatrix));
|
|
this.clippath.appendChild(clipElement);
|
|
this.defs.appendChild(this.clippath);
|
|
|
|
// Create a new group with that attribute
|
|
current.pendingClip = true;
|
|
this.cgrp = document.createElementNS(NS, 'svg:g');
|
|
this.cgrp.setAttributeNS(null, 'clip-path',
|
|
'url(#' + current.clipId + ')');
|
|
this.pgrp.appendChild(this.cgrp);
|
|
},
|
|
|
|
closePath: function SVGGraphics_closePath() {
|
|
var current = this.current;
|
|
var d = current.path.getAttributeNS(null, 'd');
|
|
d += 'Z';
|
|
current.path.setAttributeNS(null, 'd', d);
|
|
},
|
|
|
|
setLeading: function SVGGraphics_setLeading(leading) {
|
|
this.current.leading = -leading;
|
|
},
|
|
|
|
setTextRise: function SVGGraphics_setTextRise(textRise) {
|
|
this.current.textRise = textRise;
|
|
},
|
|
|
|
setHScale: function SVGGraphics_setHScale(scale) {
|
|
this.current.textHScale = scale / 100;
|
|
},
|
|
|
|
setGState: function SVGGraphics_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':
|
|
break;
|
|
case 'FL':
|
|
break;
|
|
case 'Font':
|
|
this.setFont(value);
|
|
break;
|
|
case 'CA':
|
|
break;
|
|
case 'ca':
|
|
break;
|
|
case 'BM':
|
|
break;
|
|
case 'SMask':
|
|
break;
|
|
}
|
|
}
|
|
},
|
|
|
|
fill: function SVGGraphics_fill() {
|
|
var current = this.current;
|
|
current.element.setAttributeNS(null, 'fill', current.fillColor);
|
|
},
|
|
|
|
stroke: function SVGGraphics_stroke() {
|
|
var current = this.current;
|
|
current.element.setAttributeNS(null, 'stroke', current.strokeColor);
|
|
current.element.setAttributeNS(null, 'fill', 'none');
|
|
},
|
|
|
|
eoFill: function SVGGraphics_eoFill() {
|
|
var current = this.current;
|
|
current.element.setAttributeNS(null, 'fill', current.fillColor);
|
|
current.element.setAttributeNS(null, 'fill-rule', 'evenodd');
|
|
},
|
|
|
|
fillStroke: function SVGGraphics_fillStroke() {
|
|
// Order is important since stroke wants fill to be none.
|
|
// First stroke, then if fill needed, it will be overwritten.
|
|
this.stroke();
|
|
this.fill();
|
|
},
|
|
|
|
eoFillStroke: function SVGGraphics_eoFillStroke() {
|
|
this.current.element.setAttributeNS(null, 'fill-rule', 'evenodd');
|
|
this.fillStroke();
|
|
},
|
|
|
|
closeStroke: function SVGGraphics_closeStroke() {
|
|
this.closePath();
|
|
this.stroke();
|
|
},
|
|
|
|
closeFillStroke: function SVGGraphics_closeFillStroke() {
|
|
this.closePath();
|
|
this.fillStroke();
|
|
},
|
|
|
|
paintSolidColorImageMask:
|
|
function SVGGraphics_paintSolidColorImageMask() {
|
|
var current = this.current;
|
|
var rect = document.createElementNS(NS, 'svg:rect');
|
|
rect.setAttributeNS(null, 'x', '0');
|
|
rect.setAttributeNS(null, 'y', '0');
|
|
rect.setAttributeNS(null, 'width', '1px');
|
|
rect.setAttributeNS(null, 'height', '1px');
|
|
rect.setAttributeNS(null, 'fill', current.fillColor);
|
|
this.tgrp.appendChild(rect);
|
|
},
|
|
|
|
paintJpegXObject: function SVGGraphics_paintJpegXObject(objId, w, h) {
|
|
var current = this.current;
|
|
var imgObj = this.objs.get(objId);
|
|
var imgEl = document.createElementNS(NS, 'svg:image');
|
|
imgEl.setAttributeNS(XLINK_NS, 'xlink:href', imgObj.src);
|
|
imgEl.setAttributeNS(null, 'width', imgObj.width + 'px');
|
|
imgEl.setAttributeNS(null, 'height', imgObj.height + 'px');
|
|
imgEl.setAttributeNS(null, 'x', '0');
|
|
imgEl.setAttributeNS(null, 'y', pf(-h));
|
|
imgEl.setAttributeNS(null, 'transform',
|
|
'scale(' + pf(1 / w) + ' ' + pf(-1 / h) + ')');
|
|
|
|
this.tgrp.appendChild(imgEl);
|
|
if (current.pendingClip) {
|
|
this.cgrp.appendChild(this.tgrp);
|
|
this.pgrp.appendChild(this.cgrp);
|
|
} else {
|
|
this.pgrp.appendChild(this.tgrp);
|
|
}
|
|
},
|
|
|
|
paintImageXObject: function SVGGraphics_paintImageXObject(objId) {
|
|
var imgData = this.objs.get(objId);
|
|
if (!imgData) {
|
|
warn('Dependent image isn\'t ready yet');
|
|
return;
|
|
}
|
|
this.paintInlineImageXObject(imgData);
|
|
},
|
|
|
|
paintInlineImageXObject:
|
|
function SVGGraphics_paintInlineImageXObject(imgData, mask) {
|
|
var current = this.current;
|
|
var width = imgData.width;
|
|
var height = imgData.height;
|
|
|
|
var imgSrc = convertImgDataToPng(imgData);
|
|
var cliprect = document.createElementNS(NS, 'svg:rect');
|
|
cliprect.setAttributeNS(null, 'x', '0');
|
|
cliprect.setAttributeNS(null, 'y', '0');
|
|
cliprect.setAttributeNS(null, 'width', pf(width));
|
|
cliprect.setAttributeNS(null, 'height', pf(height));
|
|
current.element = cliprect;
|
|
this.clip('nonzero');
|
|
var imgEl = document.createElementNS(NS, 'svg:image');
|
|
imgEl.setAttributeNS(XLINK_NS, 'xlink:href', imgSrc);
|
|
imgEl.setAttributeNS(null, 'x', '0');
|
|
imgEl.setAttributeNS(null, 'y', pf(-height));
|
|
imgEl.setAttributeNS(null, 'width', pf(width) + 'px');
|
|
imgEl.setAttributeNS(null, 'height', pf(height) + 'px');
|
|
imgEl.setAttributeNS(null, 'transform',
|
|
'scale(' + pf(1 / width) + ' ' +
|
|
pf(-1 / height) + ')');
|
|
if (mask) {
|
|
mask.appendChild(imgEl);
|
|
} else {
|
|
this.tgrp.appendChild(imgEl);
|
|
}
|
|
if (current.pendingClip) {
|
|
this.cgrp.appendChild(this.tgrp);
|
|
this.pgrp.appendChild(this.cgrp);
|
|
} else {
|
|
this.pgrp.appendChild(this.tgrp);
|
|
}
|
|
},
|
|
|
|
paintImageMaskXObject:
|
|
function SVGGraphics_paintImageMaskXObject(imgData) {
|
|
var current = this.current;
|
|
var width = imgData.width;
|
|
var height = imgData.height;
|
|
var fillColor = current.fillColor;
|
|
|
|
current.maskId = 'mask' + maskCount++;
|
|
var mask = document.createElementNS(NS, 'svg:mask');
|
|
mask.setAttributeNS(null, 'id', current.maskId);
|
|
|
|
var rect = document.createElementNS(NS, 'svg:rect');
|
|
rect.setAttributeNS(null, 'x', '0');
|
|
rect.setAttributeNS(null, 'y', '0');
|
|
rect.setAttributeNS(null, 'width', pf(width));
|
|
rect.setAttributeNS(null, 'height', pf(height));
|
|
rect.setAttributeNS(null, 'fill', fillColor);
|
|
rect.setAttributeNS(null, 'mask', 'url(#' + current.maskId +')');
|
|
this.defs.appendChild(mask);
|
|
this.tgrp.appendChild(rect);
|
|
|
|
this.paintInlineImageXObject(imgData, mask);
|
|
},
|
|
|
|
paintFormXObjectBegin:
|
|
function SVGGraphics_paintFormXObjectBegin(matrix, bbox) {
|
|
this.save();
|
|
|
|
if (isArray(matrix) && matrix.length === 6) {
|
|
this.transform(matrix[0], matrix[1], matrix[2],
|
|
matrix[3], matrix[4], matrix[5]);
|
|
}
|
|
|
|
if (isArray(bbox) && bbox.length === 4) {
|
|
var width = bbox[2] - bbox[0];
|
|
var height = bbox[3] - bbox[1];
|
|
|
|
var cliprect = document.createElementNS(NS, 'svg:rect');
|
|
cliprect.setAttributeNS(null, 'x', bbox[0]);
|
|
cliprect.setAttributeNS(null, 'y', bbox[1]);
|
|
cliprect.setAttributeNS(null, 'width', pf(width));
|
|
cliprect.setAttributeNS(null, 'height', pf(height));
|
|
this.current.element = cliprect;
|
|
this.clip('nonzero');
|
|
this.endPath();
|
|
}
|
|
},
|
|
|
|
paintFormXObjectEnd:
|
|
function SVGGraphics_paintFormXObjectEnd() {
|
|
this.restore();
|
|
}
|
|
};
|
|
return SVGGraphics;
|
|
})();
|
|
|
|
PDFJS.SVGGraphics = SVGGraphics;
|
|
//#endif
|
|
|
|
|
|
}).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');
|
|
})();
|
|
}
|
|
|