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Redid encoding

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sbarman 2011-08-23 18:08:47 -07:00
parent 8e8fb748ac
commit aeba156d6b
1 changed files with 123 additions and 106 deletions
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229
pdf.js
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@ -4213,118 +4213,135 @@ var PartialEvaluator = (function() {
'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
// Load the base encoding
var baseName = encoding.get('BaseEncoding');
if (baseName) {
var base = Encodings[baseName.name];
for (var j = 0, end = base.length; j < end; j++)
encodingMap[j] = GlyphsUnicode[base[j]] || 0;
} else {
TODO('need to load default encoding');
}
// Load the differences between the base and original
var differences = encoding.get('Differences');
var index = 0;
for (var j = 0; j < differences.length; j++) {
var data = differences[j];
if (IsNum(data)) {
index = data;
} else {
encodingMap[index++] = (subType.name == 'TrueType') ? j :
GlyphsUnicode[data.name];
} else {
var baseEncoding = null, diffEncoding = [];
if (fontDict.has('Encoding')) {
var encoding = xref.fetchIfRef(fontDict.get('Encoding'));
if (IsDict(encoding)) {
// Build a map of between codes and glyphs
// Load the base encoding
var baseName = encoding.get('BaseEncoding');
if (baseName) {
baseEncoding = Encodings[baseName.name].slice();
}
}
} else if (IsName(encoding)) {
var encoding = Encodings[encoding.name];
if (!encoding)
error('Unknown font encoding');
var index = 0;
for (var j = 0; j < encoding.length; j++)
encodingMap[index++] = GlyphsUnicode[encoding[j]];
// firstChar and width are required
// (except for 14 standard fonts)
var firstChar = xref.fetchIfRef(fontDict.get('FirstChar'));
var widths = xref.fetchIfRef(fontDict.get('Widths')) || [];
for (var j = 0; j < widths.length; j++) {
if (widths[j])
charset.push(encoding[j + firstChar]);
}
}
} else if (fontDict.has('ToUnicode')) {
encodingMap = {empty: true};
var cmapObj = xref.fetchIfRef(fontDict.get('ToUnicode'));
if (IsName(cmapObj)) {
error('ToUnicode file cmap translation not implemented');
} else if (IsStream(cmapObj)) {
var encoding = Encodings['WinAnsiEncoding'];
var firstChar = xref.fetchIfRef(fontDict.get('FirstChar'));
var tokens = [];
var token = '';
var cmap = cmapObj.getBytes(cmapObj.length);
for (var i = 0; i < cmap.length; i++) {
var byte = cmap[i];
if (byte == 0x20 || byte == 0x0A || byte == 0x3C || byte == 0x3E) {
switch (token) {
case 'useCMap':
error('useCMap is not implemented');
break;
case 'beginbfchar':
case 'beginbfrange':
case 'begincodespacerange':
token = '';
tokens = [];
break;
case 'endcodespacerange':
TODO('Support CMap ranges');
break;
case 'endbfrange':
for (var j = 0; j < tokens.length; j += 3) {
var startRange = parseInt('0x' + tokens[j]);
var endRange = parseInt('0x' + tokens[j + 1]);
var code = parseInt('0x' + tokens[j + 2]);
for (var k = startRange; k <= endRange; k++) {
charset.push(encoding[code++] || '.notdef');
}
}
break;
case 'endbfchar':
for (var j = 0; j < tokens.length; j += 2) {
var index = parseInt('0x' + tokens[j]);
var code = parseInt('0x' + tokens[j + 1]);
encodingMap[index] = GlyphsUnicode[encoding[code]];
charset.push(encoding[code] || '.notdef');
}
break;
default:
if (token.length) {
tokens.push(token);
token = '';
}
break;
// Load the differences between the base and original
var differences = encoding.get('Differences');
var index = 0;
for (var j = 0; j < differences.length; j++) {
var data = differences[j];
if (IsNum(data)) {
index = data;
} else {
diffEncoding[index++] = data.name;
}
}
} else if (IsName(encoding)) {
baseEncoding = Encodings[encoding.name].slice();
}
}
if (!baseEncoding) {
var type = subType.name;
if (type == 'TrueType') {
baseEncoding = Encodings.WinAnsiEncoding.slice(0);
} else if (type == 'Type1') {
baseEncoding = Encodings.StandardEncoding.slice(0);
} else {
error('Unknown type of font');
}
}
// merge in the differences
var length = baseEncoding.length > diffEncoding.length ?
baseEncoding.length : diffEncoding.length;
for (var i = 0, ii = length; i < ii; ++i) {
var diffGlyph = diffEncoding[i];
var baseGlyph = baseEncoding[i];
if (diffGlyph)
encodingMap[i] = GlyphsUnicode[diffGlyph];
else if (baseGlyph)
encodingMap[i] = GlyphsUnicode[baseGlyph];
}
if (fontDict.has('ToUnicode')) {
encodingMap = {empty: true};
var cmapObj = xref.fetchIfRef(fontDict.get('ToUnicode'));
if (IsName(cmapObj)) {
error('ToUnicode file cmap translation not implemented');
} else if (IsStream(cmapObj)) {
var encoding = Encodings['WinAnsiEncoding'];
var firstChar = xref.fetchIfRef(fontDict.get('FirstChar'));
var tokens = [];
var token = '';
var cmap = cmapObj.getBytes(cmapObj.length);
for (var i = 0; i < cmap.length; i++) {
var byte = cmap[i];
if (byte == 0x20 || byte == 0x0A || byte == 0x3C || byte == 0x3E) {
switch (token) {
case 'useCMap':
error('useCMap is not implemented');
break;
case 'beginbfchar':
case 'beginbfrange':
case 'begincodespacerange':
token = '';
tokens = [];
break;
case 'endcodespacerange':
TODO('Support CMap ranges');
break;
case 'endbfrange':
for (var j = 0; j < tokens.length; j += 3) {
var startRange = parseInt('0x' + tokens[j]);
var endRange = parseInt('0x' + tokens[j + 1]);
var code = parseInt('0x' + tokens[j + 2]);
for (var k = startRange; k <= endRange; k++) {
charset.push(encoding[code++] || '.notdef');
}
}
break;
case 'endbfchar':
for (var j = 0; j < tokens.length; j += 2) {
var index = parseInt('0x' + tokens[j]);
var code = parseInt('0x' + tokens[j + 1]);
encodingMap[index] = GlyphsUnicode[encoding[code]];
charset.push(encoding[code] || '.notdef');
}
break;
default:
if (token.length) {
tokens.push(token);
token = '';
}
break;
}
} else if (byte == 0x5B || byte == 0x5D) {
error('CMAP list parsing is not implemented');
} else {
token += String.fromCharCode(byte);
}
} else if (byte == 0x5B || byte == 0x5D) {
error('CMAP list parsing is not implemented');
} else {
token += String.fromCharCode(byte);
}
}
}
}
/* // firstChar and width are required
// (except for 14 standard fonts)
var firstChar = xref.fetchIfRef(fontDict.get('FirstChar'));
var widths = xref.fetchIfRef(fontDict.get('Widths')) || [];
for (var j = 0; j < widths.length; j++) {
if (widths[j])
charset.push(encoding[j + firstChar]);
}
*/ }
if (!fd) {
var baseFontName = fontDict.get('BaseFont');