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Merge pull request #95 from jviereck/master

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Make processing of fonts happen in a worker.
This commit is contained in:
Chris Jones 2011-06-28 14:56:10 -07:00
commit 7c9bf1f36f
8 changed files with 291 additions and 40 deletions
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38
fonts.js
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@ -64,8 +64,8 @@ var Fonts = {
var unicode = encoding[charcode];
// Check if the glyph has already been converted
if (unicode instanceof Name)
unicode = encoding[unicode] = GlyphsUnicode[unicode.name];
if (!IsNum(unicode))
unicode = encoding[unicode] = GlyphsUnicode[unicode.name];
// Handle surrogate pairs
if (unicode > 0xFFFF) {
@ -165,6 +165,7 @@ var Font = (function () {
warn("Font " + properties.type + " is not supported");
break;
}
this.data = data;
Fonts[name] = {
data: data,
@ -779,9 +780,18 @@ var Font = (function () {
});
},
bindDOM: function font_bindDom(data) {
bindDOM: function font_bindDom(data, callback) {
var fontName = this.name;
// Just adding the font-face to the DOM doesn't make it load. It
// seems it's loaded once Gecko notices it's used. Therefore,
// add a div on the page using the loaded font.
var div = document.createElement("div");
var style = 'font-family:"' + name +
'";position: absolute;top:-99999;left:-99999;z-index:-99999';
div.setAttribute("style", style);
document.body.appendChild(div);
/** Hack begin */
// Actually there is not event when a font has finished downloading so
// the following code are a dirty hack to 'guess' when a font is ready
@ -801,15 +811,19 @@ var Font = (function () {
// For some reasons the font has not loaded, so mark it loaded for the
// page to proceed but cry
if ((Date.now() - this.start) >= kMaxWaitForFontFace) {
window.clearInterval(interval);
Fonts[fontName].loading = false;
warn("Is " + fontName + " loaded?");
this.start = 0;
} else if (textWidth != ctx.measureText(testString).width) {
window.clearInterval(interval);
Fonts[fontName].loading = false;
this.start = 0;
if (textWidth == ctx.measureText(testString).width) {
if ((Date.now() - this.start) < kMaxWaitForFontFace) {
return;
} else {
warn("Is " + fontName + " loaded?");
}
}
window.clearInterval(interval);
Fonts[fontName].loading = false;
this.start = 0;
if (callback) {
callback();
}
}, 30, this);