98 lines
2.5 KiB
JavaScript
98 lines
2.5 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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'use strict';
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var consoleTimer = {};
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var console = {
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log: function log() {
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var args = Array.prototype.slice.call(arguments);
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postMessage({
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action: 'log',
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data: args
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});
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}
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};
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var consoleUtils = {
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time: function(name) {
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consoleTimer[name] = Date.now();
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},
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timeEnd: function(name) {
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var time = consoleTimer[name];
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if (time == null) {
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throw 'Unkown timer name ' + name;
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}
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console.log('Timer:', name, Date.now() - time);
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}
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};
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//
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importScripts('console.js');
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importScripts('canvas.js');
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importScripts('../pdf.js');
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importScripts('../fonts.js');
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importScripts('../crypto.js');
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importScripts('../glyphlist.js');
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// Use the JpegStreamProxy proxy.
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JpegStream = JpegStreamProxy;
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// Create the WebWorkerProxyCanvas.
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var canvas = new CanvasProxy(1224, 1584);
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// Listen for messages from the main thread.
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var pdfDocument = null;
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addEventListener('message', function(event) {
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var data = event.data;
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// If there is no pdfDocument yet, then the sent data is the PDFDocument.
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if (!pdfDocument) {
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pdfDocument = new PDFDoc(new Stream(data));
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postMessage({
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action: 'pdf_num_pages',
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data: pdfDocument.numPages
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});
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return;
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}
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// User requested to render a certain page.
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else {
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consoleUtils.time('compile');
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// Let's try to render the first page...
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var page = pdfDocument.getPage(parseInt(data, 10));
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var pdfToCssUnitsCoef = 96.0 / 72.0;
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var pageWidth = (page.mediaBox[2] - page.mediaBox[0]) * pdfToCssUnitsCoef;
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var pageHeight = (page.mediaBox[3] - page.mediaBox[1]) * pdfToCssUnitsCoef;
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postMessage({
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action: 'setup_page',
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data: pageWidth + ',' + pageHeight
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});
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// Set canvas size.
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canvas.width = pageWidth;
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canvas.height = pageHeight;
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// page.compile will collect all fonts for us, once we have loaded them
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// we can trigger the actual page rendering with page.display
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var fonts = [];
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var gfx = new CanvasGraphics(canvas.getContext('2d'), CanvasProxy);
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page.compile(gfx, fonts);
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consoleUtils.timeEnd('compile');
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// Send fonts to the main thread.
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consoleUtils.time('fonts');
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postMessage({
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action: 'fonts',
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data: fonts
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});
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consoleUtils.timeEnd('fonts');
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consoleUtils.time('display');
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page.display(gfx);
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canvas.flush();
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consoleUtils.timeEnd('display');
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}
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});
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