yetangitu/pdf.js
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

Trying to implement progressive font rendering. Works on FF, but Chrome doesn't catchup the fonts

Browse source
This commit is contained in:
Julian Viereck 2011-09-09 16:15:51 -07:00
parent ac11f30ae9
commit dd9aea21e9
4 changed files with 115 additions and 98 deletions
Download patch file Download diff file Expand all files Collapse all files

79
worker.js
View file

@ -62,16 +62,25 @@ var WorkerPage = (function() {
var Objects = {
resolve: function(objId, data) {
// In case there is a promise already on this object, just resolve it.
if (Objects[objId] instanceof Promise) {
if (Objects[objId]) {
Objects[objId].resolve(data);
} else {
Objects[objId] = new Promise(data);
Objects[objId] = new Promise(objId, data);
}
},
get: function(objId) {
var obj = Objects[objId];
if (!obj || !obj.isResolved) {
throw "Requesting object that isn't resolved yet";
}
return obj.data;
}
};
var Promise = (function() {
function Promise(data) {
function Promise(name, data) {
this.name = name;
// If you build a promise and pass in some data it's already resolved.
if (data != null) {
this.isResolved = true;
@ -84,6 +93,8 @@ var Promise = (function() {
Promise.prototype = {
resolve: function(data) {
console.log("resolve", this.name);
if (this.isResolved) {
throw "A Promise can be resolved only once";
}
@ -137,29 +148,6 @@ var WorkerPDFDoc = (function() {
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];
// Some fonts don't have a file, e.g. the build in ones like Arial.
if (font.file) {
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);
// Check if this is a FlateStream. Otherwise just use the created
// Stream one. This makes complex_ttf_font.pdf work.
var cmf = font.file.bytes[0];
if ((cmf & 0x0f) == 0x08) {
font.file = new FlateStream(fontFile);
} else {
font.file = fontFile;
}
}
}
page.startRenderingFromIRQueue(data.IRQueue, data.fonts);
}, this);
@ -173,6 +161,45 @@ var WorkerPDFDoc = (function() {
var IR = data[2];
new JpegStreamIR(objId, IR);
break;
case "Font":
var name = data[2];
var file = data[3];
var properties = data[4];
console.log("got new font", name);
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;
}
}
FontLoader.bind(
[ font ],
function(fontObjs) {
var fontObj = fontObjs[0];
Objects.resolve(objId, fontObj);
}
);
break;
default:
throw "Got unkown object type " + objType;
}