yetangitu/pdf.js
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Refactor to execute IR on main thead by posting messages to itself

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This commit is contained in:
Julian Viereck 2011-09-07 10:16:02 -07:00
parent a3baea5fcb
commit ac4a57e858
6 changed files with 157 additions and 112 deletions
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67
worker.js
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@ -60,31 +60,48 @@ var WorkerPDFDoc = (function() {
this.pageCache = [];
this.worker = new Worker("../worker/boot.js");
this.handler = new MessageHandler("main", {
"page": function(data) {
var pageNum = data.pageNum;
var page = this.pageCache[pageNum];
// Add necessary shape back to fonts.
var fonts = data.fonts;
for (var i = 0; i < fonts.length; i++) {
var font = fonts[i];
var fontFileDict = new Dict();
fontFileDict.map = font.file.dict.map;
var fontFile = new Stream(font.file.bytes, font.file.start,
font.file.end - font.file.start, fontFileDict);
font.file = new FlateStream(fontFile);
}
console.log("startRenderingFromPreCompilation:", "numberOfFonts", fonts.length);
page.startRenderingFromPreCompilation(data.preCompilation, data.fonts, data.images);
}
}, this.worker, this);
var useWorker = false;
this.handler.send("doc", data);
if (useWorker) {
var worker = new Worker("../worker/boot.js");
} else {
// If we don't use a worker, just post/sendMessage to the main thread.
var worker = {
postMessage: function(obj) {
worker.onmessage({data: obj});
}
}
}
var handler = this.handler = new MessageHandler("main", worker);
handler.on("page", function(data) {
var pageNum = data.pageNum;
var page = this.pageCache[pageNum];
// Add necessary shape back to fonts.
var fonts = data.fonts;
for (var i = 0; i < fonts.length; i++) {
var font = fonts[i];
var fontFileDict = new Dict();
fontFileDict.map = font.file.dict.map;
var fontFile = new Stream(font.file.bytes, font.file.start,
font.file.end - font.file.start, fontFileDict);
font.file = new FlateStream(fontFile);
}
console.log("startRenderingFromPreCompilation:", "numberOfFonts", fonts.length);
page.startRenderingFromPreCompilation(data.preCompilation, data.fonts, data.images);
}, this);
if (!useWorker) {
// If the main thread is our worker, setup the handling for the messages
// the main thread sends to it self.
WorkerHandler.setup(handler);
}
handler.send("doc", data);
}
constructor.prototype = {
@ -93,7 +110,7 @@ var WorkerPDFDoc = (function() {
},
startRendering: function(page) {
this.handler.send("page", page.page.pageNumber + 1);
this.handler.send("page_request", page.page.pageNumber + 1);
},
getPage: function(n) {