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Merge font and processor working into one worker and fix some bugs in font-loading-data-ready code

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This commit is contained in:
Julian Viereck 2011-10-05 22:24:38 +02:00
parent e9b6ffbaf6
commit d7521f758a
8 changed files with 89 additions and 84 deletions
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11
fonts.js
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@ -211,6 +211,17 @@ var FontLoader = {
},
bind: function fontLoaderBind(fonts, callback, objects) {
var fontsToLoad = {};
// check if there are twice the same font.
for (var i = 0; i < fonts.length; i++) {
var fontName = fonts[i].loadedName;
if (fontsToLoad[fontName]) {
throw "Got twice the same font!";
} else {
fontsToLoad[fontName] = true;
}
}
function checkFontsLoaded() {
for (var i = 0; i < objs.length; i++) {
var fontObj = objs[i];

2
pdf.js
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@ -3387,7 +3387,7 @@ var Page = (function() {
},
ensureFonts: function(fonts, callback) {
console.log('--ensureFonts--');
console.log('--ensureFonts--', '' + fonts);
// Convert the font names to the corresponding font obj.
for (var i = 0; i < fonts.length; i++) {
// HACK FOR NOW. Access the data directly. This isn't allowed as the

1
web/viewer.html
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@ -14,7 +14,6 @@
<script type="text/javascript" src="../worker.js"></script>
<script type="text/javascript" src="../worker/message_handler.js"></script>
<script type="text/javascript" src="../worker/processor_handler.js"></script>
<script type="text/javascript" src="../worker/font_handler.js"></script>
</head>
<body>

42
worker.js
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@ -264,8 +264,7 @@ var WorkerPDFDoc = (function() {
this.pageCache = [];
if (useWorker) {
var worker = this.worker = new Worker("../worker/processor_boot.js");
var fontWorker = this.fontWorker = new Worker('../worker/font_boot.js');
var worker = this.worker = new Worker("../worker/pdf_worker_loader.js");
} else {
// If we don't use a worker, just post/sendMessage to the main thread.
var worker = {
@ -273,12 +272,9 @@ var WorkerPDFDoc = (function() {
worker.onmessage({data: obj});
}
}
var fontWorker = {
postMessage: function(obj) {
fontWorker.onmessage({data: obj});
}
}
}
this.fontsLoading = {};
var processorHandler = this.processorHandler = new MessageHandler("main", worker);
processorHandler.on("page", function(data) {
@ -289,23 +285,43 @@ var WorkerPDFDoc = (function() {
// are all the fonts that are required to render the page AND that
// aren't loaded on the page yet.
var depFonts = data.depFonts;
var fontsToLoad = [];
var objs = this.objs;
var fontsToLoad = [];
var fontsLoading = this.fontsLoading;
// The `i` for the checkFontData is stored here to keep the state in
// the closure.
var i = 0;
function checkFontData() {
// Check if all fontObjs have been processed. If not, shedule a
// callback that is called once the data arrives and that checks
// the next fonts.
for (var i = 0; i < depFonts.length; i++) {
for (i; i < depFonts.length; i++) {
var fontName = depFonts[i];
if (!objs.hasData(fontName)) {
console.log('need to wait for fontData', fontName);
objs.onData(fontObj, checkFontData);
objs.onData(fontName, checkFontData);
return;
} else if (!objs.isResolved(fontName)) {
fontsToLoad.push(fontName);
}
}
// There can be edge cases where two pages wait for one font and then
// call startRenderingFromIRQueue twice with the same font. That makes
// the font getting loaded twice and throw an error later as the font
// promise gets resolved twice.
// This prevents thats fonts are loaded really only once.
for (var j = 0; j < fontsToLoad.length; j++) {
var fontName = fontsToLoad[j];
if (fontsLoading[fontName]) {
fontsToLoad.splice(j, 1);
j--;
} else {
fontsLoading[fontName] = true;
}
}
// At this point, all font data ia loaded. Start the actuall rendering.
page.startRenderingFromIRQueue(data.IRQueue, fontsToLoad);
@ -329,15 +345,14 @@ var WorkerPDFDoc = (function() {
var file = data[3];
var properties = data[4];
fontHandler.send("font", [objId, name, file, properties]);
processorHandler.send("font", [objId, name, file, properties]);
break;
default:
throw "Got unkown object type " + objType;
}
}, this);
var fontHandler = this.fontHandler = new MessageHandler('font', fontWorker);
fontHandler.on('font_ready', function(data) {
processorHandler.on('font_ready', function(data) {
var objId = data[0];
var fontObj = new FontShape(data[1]);
@ -355,7 +370,6 @@ var WorkerPDFDoc = (function() {
// If the main thread is our worker, setup the handling for the messages
// the main thread sends to it self.
WorkerProcessorHandler.setup(processorHandler);
WorkerFontHandler.setup(fontHandler);
}
processorHandler.send("doc", data);

16
worker/font_boot.js
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@ -1,16 +0,0 @@
/* -*- 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('message_handler.js');
importScripts('../pdf.js');
importScripts('../fonts.js');
importScripts('../crypto.js');
importScripts('../glyphlist.js');
importScripts('font_handler.js');
var handler = new MessageHandler("worker_font", this);
WorkerFontHandler.setup(handler);

52
worker/font_handler.js
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@ -1,52 +0,0 @@
var WorkerFontHandler = {
setup: function(handler) {
handler.on("font", function(data) {
var objId = data[0];
var name = data[1];
var file = data[2];
var properties = data[3];
var font = {
name: name,
file: file,
properties: properties
};
// Some fonts don't have a file, e.g. the build in ones like Arial.
if (file) {
var fontFileDict = new Dict();
fontFileDict.map = file.dict.map;
var fontFile = new Stream(file.bytes, file.start,
file.end - file.start, fontFileDict);
// Check if this is a FlateStream. Otherwise just use the created
// Stream one. This makes complex_ttf_font.pdf work.
var cmf = file.bytes[0];
if ((cmf & 0x0f) == 0x08) {
font.file = new FlateStream(fontFile);
} else {
font.file = fontFile;
}
}
var obj = new Font(font.name, font.file, font.properties);
var str = '';
var data = obj.data;
if (data) {
var length = data.length;
for (var j = 0; j < length; j++)
str += String.fromCharCode(data[j]);
}
obj.str = str;
// Remove the data array form the font object, as it's not needed
// anymore as we sent over the ready str.
delete obj.data;
handler.send("font_ready", [objId, obj]);
});
}
}

0
worker/processor_boot.js → worker/pdf_worker_loader.js
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49
worker/processor_handler.js
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@ -63,5 +63,54 @@ var WorkerProcessorHandler = {
depFonts: Object.keys(fonts)
});
}, this);
handler.on("font", function(data) {
var objId = data[0];
var name = data[1];
var file = data[2];
var properties = data[3];
var font = {
name: name,
file: file,
properties: properties
};
// Some fonts don't have a file, e.g. the build in ones like Arial.
if (file) {
var fontFileDict = new Dict();
fontFileDict.map = file.dict.map;
var fontFile = new Stream(file.bytes, file.start,
file.end - file.start, fontFileDict);
// Check if this is a FlateStream. Otherwise just use the created
// Stream one. This makes complex_ttf_font.pdf work.
var cmf = file.bytes[0];
if ((cmf & 0x0f) == 0x08) {
font.file = new FlateStream(fontFile);
} else {
font.file = fontFile;
}
}
var obj = new Font(font.name, font.file, font.properties);
var str = '';
var data = obj.data;
if (data) {
var length = data.length;
for (var j = 0; j < length; j++)
str += String.fromCharCode(data[j]);
}
obj.str = str;
// Remove the data array form the font object, as it's not needed
// anymore as we sent over the ready str.
delete obj.data;
handler.send("font_ready", [objId, obj]);
});
}
}