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Add more TrueType rewriting magic ('post' table)

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This commit is contained in:
Vivien Nicolas 2011-06-20 08:20:31 +02:00
parent 5c4f26019e
commit c345a4c75e
2 changed files with 50 additions and 33 deletions
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38
fonts.js
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@ -23,6 +23,7 @@ var kMaxWaitForFontFace = 1000;
* many fonts are loaded.
*/
var fontCount = 0;
var fontName = "";
/**
* Hold a map of decoded fonts and of the standard fourteen Type1 fonts and
@ -38,6 +39,7 @@ var Fonts = {
},
set active(aName) {
fontName = aName;
this._active = this[aName];
},
@ -694,7 +696,7 @@ var TrueType = function(aName, aFile, aProperties) {
// If any tables are still in the array this means some required tables are
// missing, which means that we need to rebuild the font in order to pass
// the sanitizer.
if (requiredTables.length == 1 && requiredTables[0] == "OS/2") {
if (requiredTables.length && requiredTables[0] == "OS/2") {
var OS2 = [
0x00, 0x03, // version
0x02, 0x24, // xAvgCharWidth
@ -747,13 +749,43 @@ var TrueType = function(aName, aFile, aProperties) {
// Replace the old CMAP table
var rewrittedCMAP = this._createCMAPTable(glyphs);
var cmapDelta = rewrittedCMAP.length - originalCMAP.data.length;
var offsetDelta = rewrittedCMAP.length - originalCMAP.data.length;
originalCMAP.data = rewrittedCMAP;
// Rewrite the 'post' table if needed
var postTable = null;
for (var i = 0; i < tables.length; i++) {
var table = tables[i];
if (table.tag == "post") {
postTable = table;
break;
}
}
if (!postTable) {
var post = [
0x00, 0x03, 0x00, 0x00, // Version number
0x00, 0x00, 0x01, 0x00, // italicAngle
0x00, 0x00, // underlinePosition
0x00, 0x00, // underlineThickness
0x00, 0x00, 0x00, 0x00, // isFixedPitch
0x00, 0x00, 0x00, 0x00, // minMemType42
0x00, 0x00, 0x00, 0x00, // maxMemType42
0x00, 0x00, 0x00, 0x00, // minMemType1
0x00, 0x00, 0x00, 0x00 // maxMemType1
];
offsetDelta += post.length;
tables.unshift({
tag: "post",
data: post
});
}
// Create a new file to hold the new version of our truetype with a new
// header and new offsets
var stream = aFile.stream || aFile;
var ttf = new Uint8Array(stream.length + 16 + OS2.length + cmapDelta);
var ttf = new Uint8Array(stream.length + 1024);
// The new numbers of tables will be the last one plus the num of missing
// tables