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Fully support truetype composite fonts, clean up

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This commit is contained in:
Adil Allawi 2011-07-13 09:31:34 +01:00
parent 926e4f1130
commit 36763e8e82
2 changed files with 137 additions and 95 deletions
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pdf.js
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@ -3630,7 +3630,7 @@ var PartialEvaluator = (function() {
var compositeFont = false;
assertWellFormed(IsName(subType), 'invalid font Subtype');
//If font is a composite
// If font is a composite
// - get the descendant font
// - set the type according to the descendant font
// - get the FontDescriptor from the descendant font
@ -3664,31 +3664,35 @@ var PartialEvaluator = (function() {
var encodingMap = {};
var charset = [];
if (compositeFont) {
//Special CIDFont support
//XXX only identity CID Encodings supported for now
var encoding = xref.fetchIfRef(fontDict.get('Encoding'));
if (IsName(encoding)) {
//Encoding is a predefined CMap
if (encoding.name == 'Identity-H') {
if (subType.name == 'CIDFontType2') {
var cidToGidMap = descendant.get('CIDToGIDMap');
if (cidToGidMap) {
//Extract the charset from the CIDToGIDMap
var glyphsStream = xref.fetchIfRef(cidToGidMap);
var glyphsData = glyphsStream.getBytes(0);
var i = 0;
//glyph ids are big-endian 2-byte values
for (var j=0; j<glyphsData.length; j++) {
var glyphID = (glyphsData[j++] << 8) | glyphsData[j];
charset.push(glyphID);
}
}
// Special CIDFont support
// XXX only CIDFontType2 supported for now
if (subType.name == 'CIDFontType2') {
var cidToGidMap = descendant.get('CIDToGIDMap');
if (cidToGidMap && IsRef(cidToGidMap)) {
// Extract the charset from the CIDToGIDMap
var glyphsStream = xref.fetchIfRef(cidToGidMap);
var glyphsData = glyphsStream.getBytes(0);
var i = 0;
// Glyph ids are big-endian 2-byte values
for (var j=0; j<glyphsData.length; j++) {
var glyphID = (glyphsData[j++] << 8) | glyphsData[j];
charset.push(glyphID);
}
}
}
else {
// XXX This is a placeholder for handling of the encoding of CIDFontType0 fonts
var encoding = xref.fetchIfRef(fontDict.get('Encoding'));
if (IsName(encoding)) {
// Encoding is a predefined CMap
if (encoding.name == 'Identity-H') {
TODO ('Need to create an identity cmap')
} else {
TODO ('Need to support predefined CMaps see PDF 32000-1:2008 9.7.5.2 Predefined CMaps')
}
} else {
TODO ('Need to support predefined CMaps see PDF 32000-1:2008 9.7.5.2 Predefined CMaps')
TODO ('Need to support encoding streams see PDF 32000-1:2008 9.7.5.3');
}
} else {
TODO ('Need to support encoding streams see PDF 32000-1:2008 9.7.5.3');
}
} else if (fontDict.has('Encoding')) {
var encoding = xref.fetchIfRef(fontDict.get('Encoding'));