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Initial ToUnicode modifications

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notmasteryet 2011-11-24 09:38:09 -06:00
parent 59d9dfc014
commit 709dc1a0c9
3 changed files with 55 additions and 10 deletions
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41
src/fonts.js
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@ -771,7 +771,6 @@ var Font = (function Font() {
this.widths = properties.widths;
this.defaultWidth = properties.defaultWidth;
this.composite = properties.composite;
this.toUnicode = properties.toUnicode;
this.hasEncoding = properties.hasEncoding;
this.fontMatrix = properties.fontMatrix;
@ -781,6 +780,11 @@ var Font = (function Font() {
// Trying to fix encoding using glyph CIDSystemInfo.
this.loadCidToUnicode(properties);
if (properties.toUnicode)
this.toUnicode = properties.toUnicode;
else
this.rebuildToUnicode(properties);
if (!file) {
// The file data is not specified. Trying to fix the font name
// to be used with the canvas.font.
@ -1898,6 +1902,29 @@ var Font = (function Font() {
return stringToArray(otf.file);
},
rebuildToUnicode: function font_rebuildToUnicode(properties) {
var map = [];
if (properties.composite) {
for (var i = properties.firstChar, ii = properties.lastChar; i <= ii; i++) {
// TODO missing map the character according font's CMap
var cid = i;
map[i] = this.cidToUnicode[cid];
}
} else {
for (var i = properties.firstChar, ii = properties.lastChar; i <= ii; i++) {
var glyph = properties.differences[i];
if (!glyph)
glyph = properties.baseEncoding[i];
if (!!glyph && (glyph in GlyphsUnicode))
map[i] = GlyphsUnicode[glyph]
}
}
this.toUnicode = map;
this.refreshToUnicode = function refreshToUnicode() {
this.font_rebuildToUnicode(properties);
};
},
loadCidToUnicode: function font_loadCidToUnicode(properties) {
if (properties.cidToGidMap) {
this.cidToUnicode = properties.cidToGidMap;
@ -2039,8 +2066,18 @@ var Font = (function Font() {
warn('Unsupported font type: ' + this.type);
break;
}
var unicodeChars = this.toUnicode ? this.toUnicode[charcode] : charcode;
if (typeof unicodeChars === 'number') {
unicodeChars = (unicodeChars >= 0x10000) ?
String.fromCharCode(0xD800 | ((unicodeChars - 0x10000) >> 10),
0xDC00 | (unicodeChars & 0x3FF)) : String.fromCharCode(unicodeChars);
// TODO we probably don't need convert high/low surrogate... keeping for now
}
return {
unicode: unicode,
fontChar: String.fromCharCode(unicode),
unicode: unicodeChars,
width: isNum(width) ? width : this.defaultWidth,
codeIRQueue: codeIRQueue
};