61 lines
1.7 KiB
JavaScript
61 lines
1.7 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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importScripts('console.js');
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importScripts('message_handler.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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// Listen for messages from the main thread.
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var pdfDoc = null;
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var handler = new MessageHandler("worker", {
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"doc": function(data) {
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pdfDoc = new PDFDoc(new Stream(data));
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console.log("setup pdfDoc");
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},
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"page": function(pageNum) {
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pageNum = parseInt(pageNum);
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console.log("about to process page", pageNum);
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var page = pdfDoc.getPage(pageNum);
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// The following code does quite the same as Page.prototype.startRendering,
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// but stops at one point and sends the result back to the main thread.
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var gfx = new CanvasGraphics(null);
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var fonts = [];
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// TODO: Figure out how image loading is handled inside the worker.
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var images = new ImagesLoader();
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// Pre compile the pdf page and fetch the fonts/images.
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var preCompilation = page.preCompile(gfx, fonts, images);
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// Extract the minimum of font data that is required to build all required
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// font stuff on the main thread.
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var fontsMin = [];
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for (var i = 0; i < fonts.length; i++) {
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var font = fonts[i];
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fontsMin.push({
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name: font.name,
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file: font.file,
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properties: font.properties
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});
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}
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// TODO: Handle images here.
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handler.send("page", {
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pageNum: pageNum,
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fonts: fontsMin,
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images: [],
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preCompilation: preCompilation,
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});
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}
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}, this);
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