86 lines
2.0 KiB
JavaScript
86 lines
2.0 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 timer = null;
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function tic() {
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timer = Date.now();
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}
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function toc(msg) {
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log(msg + ": " + (Date.now() - timer) + "ms");
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timer = null;
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}
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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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args: args
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});
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}
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var console = {
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log: log
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}
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//
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importScripts("canvas_proxy.js");
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importScripts("pdf.js");
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importScripts("fonts.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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tic();
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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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// 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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// Inspect fonts and translate the missing one.
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var count = fonts.length;
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for (var i = 0; i < count; i++) {
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var font = fonts[i];
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if (Fonts[font.name]) {
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fontsReady = fontsReady && !Fonts[font.name].loading;
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continue;
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}
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// This "builds" the font and sents it over to the main thread.
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new Font(font.name, font.file, font.properties);
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}
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toc("compiled page");
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tic()
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page.display(gfx);
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canvas.flush();
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toc("displayed page");
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}
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}
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