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back out bad font measurement changes

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This commit is contained in:
Chris Jones 2011-07-09 21:43:28 -07:00
parent db9b0b1d66
commit 671dd3b0e8
2 changed files with 44 additions and 14 deletions
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32
fonts.js
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@ -22,7 +22,14 @@ var kMaxWaitForFontFace = 1000;
*/
var Fonts = (function Fonts() {
var kScalePrecision = 40;
var fonts = [];
if (!isWorker) {
var ctx = document.createElement('canvas').getContext('2d');
ctx.scale(1 / kScalePrecision, 1);
}
var fontCount = 0;
function FontInfo(name, data, properties) {
@ -35,6 +42,7 @@ var Fonts = (function Fonts() {
}
var current;
var measureCache;
return {
registerFont: function fonts_registerFont(fontName, data, properties) {
@ -49,6 +57,28 @@ var Fonts = (function Fonts() {
},
lookupById: function fonts_lookupById(id) {
return fonts[id];
},
setActive: function fonts_setActive(fontName, fontObj, size) {
// |current| can be null is fontName is a built-in font
// (e.g. "sans-serif")
if (fontObj && (current = fonts[fontObj.id])) {
var sizes = current.sizes;
if (!(measureCache = sizes[size]))
measureCache = sizes[size] = Object.create(null);
} else {
measureCache = null
}
ctx.font = (size * kScalePrecision) + 'px "' + fontName + '"';
},
measureText: function fonts_measureText(text) {
var width;
if (measureCache && (width = measureCache[text]))
return width;
width = ctx.measureText(text).width / kScalePrecision;
if (measureCache)
measureCache[text] = width;
return width;
}
};
})();
@ -1080,7 +1110,7 @@ var Font = (function() {
return rule;
},
charsToUnicode: function fonts_charsToUnicode(chars) {
charsToUnicode: function fonts_chars2Unicode(chars) {
var charsCache = this.charsCache;
// if we translated this string before, just grab it from the cache