yetangitu/pdf.js
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Add dependency management for loading images that causes the execution to halt if the dependency isn't satisfied during executing time

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This commit is contained in:
Julian Viereck 2011-09-07 19:50:05 -07:00
parent e7b636dba4
commit 7e3bbccaae
2 changed files with 76 additions and 35 deletions
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54
worker.js
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@ -51,12 +51,27 @@ var WorkerPage = (function() {
})();
// This holds a list of objects the IR queue depends on.
var Objects = {};
var Objects = {
resolve: function(objId, data) {
// In case there is a promise already on this object, just resolve it.
if (Objects[objId] instanceof Promise) {
Objects[objId].resolve(data);
} else {
Objects[objId] = new Promise(data);
}
}
};
var Promise = (function() {
function Promise(name) {
this.name = name;
this.isResolved = false;
function Promise(data) {
// If you build a promise and pass in some data it's already resolved.
if (data != null) {
this.isResolved = true;
this.data = data;
} else {
this.isResolved = false;
}
this.callbacks = [];
};
Promise.prototype = {
@ -83,6 +98,7 @@ var Promise = (function() {
}
}
}
return Promise;
})();
var WorkerPDFDoc = (function() {
@ -95,7 +111,7 @@ var WorkerPDFDoc = (function() {
this.pageCache = [];
var useWorker = true;
var useWorker = false;
if (useWorker) {
var worker = new Worker("../worker/boot.js");
@ -125,29 +141,17 @@ var WorkerPDFDoc = (function() {
font.file.end - font.file.start, fontFileDict);
font.file = new FlateStream(fontFile);
}
var imageLoadingDone = function() {
var timeStart = new Date();
console.log("startRenderingFromPreCompilation:", "numberOfFonts", fonts.length);
page.startRenderingFromIRQueue(data.IRQueue, data.fonts, data.images);
console.log("RenderingTime", (new Date()) - timeStart);
}
var images = data.images;
if (images.length != 0) {
// Generate JpegStreams based on IR information and start rendering
// once the compilation is done.
var loader = new ImagesLoader();
loader.onLoad = imageLoadingDone;
for (var i = 0; i < images.length; i++) {
var image = images[i];
var stream = new JpegStreamIR(image.id, image.IR);
loader.bind(stream);
}
} else {
imageLoadingDone();
for (var i = 0; i < images.length; i++) {
var image = images[i];
var stream = new JpegStreamIR(image.id, image.IR);
}
var timeStart = new Date();
console.log("startRenderingFromPreCompilation:", "numberOfFonts", fonts.length);
page.startRenderingFromIRQueue(data.IRQueue, data.fonts, data.images);
console.log("RenderingTime", (new Date()) - timeStart);
}, this);
if (!useWorker) {