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Second pass CIDFont support - make Arial Unicode in OpenOffice PDF

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- supports PDF fonts with CIDtoGIDMap and no cmap
This commit is contained in:
Adil Allawi 2011-07-11 17:41:47 +01:00
parent ea2d651709
commit 7b8542c6a7
2 changed files with 125 additions and 43 deletions
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60
pdf.js
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@ -64,6 +64,14 @@ function stringToBytes(str) {
return bytes;
}
function singleByteToMultiByteString (str) {
var multiByteStr = "";
var bytes = stringToBytes(e);
for (var j = 0; j<bytes.length; j++) {
multiByteStr += String.fromCharCode((bytes[j++]<<16) | bytes[j]);
}
return multiByteStr;
}
var Stream = (function() {
function constructor(arrayBuffer, start, length, dict) {
this.bytes = new Uint8Array(arrayBuffer);
@ -3624,19 +3632,26 @@ var PartialEvaluator = (function() {
},
translateFont: function(fontDict, xref, resources) {
var fd = fontDict.get('FontDescriptor');
if (!fd)
var fd;
var descendant = [];
var subType = fontDict.get('Subtype');
assertWellFormed(IsName(subType), 'invalid font Subtype');
//If font is a composite get the FontDescriptor from the descendant font
if (subType.name == "Type0")
{
//If font is a composite get the FontDescriptor from the descendant
var df = fontDict.get("DescendantFonts");
if (!df)
return null;
var descendant = xref.fetch(df[0]);
descendant = xref.fetch(df[0]);
fd = descendant.get("FontDescriptor");
if (!fd)
return null;
fontDict.set("FontDescriptor", fd);
} else {
fd = fontDict.get('FontDescriptor');
}
if (!fd)
return null;
var descriptor = xref.fetch(fd);
var fontName = descriptor.get('FontName');
@ -3650,7 +3665,32 @@ var PartialEvaluator = (function() {
var encodingMap = {};
var charset = [];
if (fontDict.has('Encoding')) {
if (subType.name == 'Type0') {
//XXX CIDFont support - only identity CID Encoding for now
var encoding = xref.fetchIfRef(fontDict.get('Encoding'));
if (IsName(encoding)) {
//Encoding is a predefined CMap
if (encoding.name == 'Identity-H') {
if (descendant.get('Subtype').name == 'CIDFontType2')
{
//Extract an encoding from the CIDToGIDMap
var glyphsStream = xref.fetchIfRef(descendant.get('CIDToGIDMap'));
var glyphsData = glyphsStream.getBytes(0);
var i = 0;
for (var j=0; j<glyphsData.length; j++) {
var glyphID = (glyphsData[j++]*0x100)+glyphsData[j];
//encodingMap[glyphID] = i++;
charset.push(glyphID);
}
encoding[0] = 0;
}
} else {
TODO ('Need to support predefined CMaps see PDF 32000-1:2008 9.7.5.2 Predefined CMaps')
}
} 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'));
if (IsDict(encoding)) {
// Build a map of between codes and glyphs
@ -3682,7 +3722,6 @@ var PartialEvaluator = (function() {
}
} else if (IsName(encoding)) {
var encoding = Encodings[encoding.name];
//XXX CIDFont support - get the CID Encoding especially support japan1 and identity
if (!encoding)
error('Unknown font encoding');
@ -3767,9 +3806,6 @@ var PartialEvaluator = (function() {
}
}
var subType = fontDict.get('Subtype');
assertWellFormed(IsName(subType), 'invalid font Subtype');
var properties = {
type: subType.name,
encoding: encodingMap,