96 lines
2.4 KiB
JavaScript
96 lines
2.4 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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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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this.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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onmessage = 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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console.time("compile");
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// Let's try to render the first page...
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var page = pdfDocument.getPage(parseInt(data));
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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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console.timeEnd("compile");
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// Send fonts to the main thread.
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console.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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console.timeEnd("fonts");
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console.time("display");
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page.display(gfx);
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canvas.flush();
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console.timeEnd("display");
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}
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}
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