backup

worker/boot.js

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+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+
+'use strict';
+
+//
+importScripts('console.js');
+importScripts('event_handler.js');
+importScripts('../pdf.js');
+importScripts('../fonts.js');
+importScripts('../crypto.js');
+importScripts('../glyphlist.js');
+
+// Listen for messages from the main thread.
+var pdfDoc = null;
+
+var handler = new MessageHandler({
+  "doc": function(data) {
+    pdfDocument = new PDFDoc(new Stream(data));
+    console.log("setup pdfDoc");
+  },
+  
+  "page": function(pageNum) {
+    pageNum = parseInt(pageNum);
+    console.log("about to process page", pageNum);
+    
+    var page = pdfDocument.getPage(pageNum);
+    
+    // The following code does quite the same as Page.prototype.startRendering,
+    // but stops at one point and sends the result back to the main thread.
+    var gfx = new CanvasGraphics(canvasCtx);
+    var fonts = [];
+    // TODO: Figure out how image loading is handled inside the worker.
+    var images = new ImagesLoader();
+    
+    // Pre compile the pdf page and fetch the fonts/images.
+    var preCompilation = page.preCompile(gfx, fonts, images);
+    
+    // Extract the minimum of font data that is required to build all required
+    // font stuff on the main thread.
+    var fontsMin = [];
+    for (var i = 0; i < fonts.length; i++) {
+      var font = fonts[i];
+    
+      fontsMin.push({
+        name:       orgFont.name,
+        file:       orgFont.file,
+        properties: orgFont.properties
+      });
+    }
+    
+    // TODO: Handle images here.
+    
+    handler.send("page", {
+      pageNum:        pageNum,
+      fonts:          fontsMin,
+      images:         [],
+      preCompilation: preCompilation,
+    });
+  }
+}, postMessage);
+
+onmessage = handler.onMessage;