Sakurai/pdf.js
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Add a simpler path for cmap format 0 to cmap format 4

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This commit is contained in:
Vivien Nicolas 2011-07-20 14:29:07 +02:00
parent 4275a68e29
commit 3cc9912acd
2 changed files with 17 additions and 33 deletions
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47
fonts.js
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@ -533,6 +533,7 @@ var Font = (function Font() {
} }
// Removes duplicate ranges // Removes duplicate ranges
/*
for (var i = ranges.length - 1; i > 0; i--) { for (var i = ranges.length - 1; i > 0; i--) {
var range = ranges[i]; var range = ranges[i];
var prevRange = ranges[i - 1]; var prevRange = ranges[i - 1];
@ -541,12 +542,12 @@ var Font = (function Font() {
ranges.splice(i - 1, 1); ranges.splice(i - 1, 1);
} }
} }
*/
return ranges; return ranges;
}; };
function createCMapTable(glyphs) { function createCMapTable(glyphs, deltas) {
glyphs.push({ unicode: 0x0000 });
var ranges = getRanges(glyphs); var ranges = getRanges(glyphs);
var numTables = 1; var numTables = 1;
@ -573,18 +574,17 @@ var Font = (function Font() {
var range = ranges[i]; var range = ranges[i];
var start = range[0]; var start = range[0];
var end = range[1]; var end = range[1];
var delta = (bias - start) & 0xffff; var offset = (segCount - i) * 2 + bias * 2;
bias += (end - start + 1); bias += (end - start + 1);
startCount += string16(start); startCount += string16(start);
endCount += string16(end); endCount += string16(end);
idDeltas += string16(delta); idDeltas += string16(0);
idRangeOffsets += string16(0); idRangeOffsets += string16(offset);
}
for (var j = start; j <= end; j++) { for (var i = 0; i < glyphs.length; i++)
glyphsIds += string16(j); glyphsIds += string16(deltas ? deltas[i] : i + 1);
}
}
endCount += '\xFF\xFF'; endCount += '\xFF\xFF';
startCount += '\xFF\xFF'; startCount += '\xFF\xFF';
@ -832,30 +832,15 @@ var Font = (function Font() {
// under this limit they will not be displayed so let's rewrite the // under this limit they will not be displayed so let's rewrite the
// CMap. // CMap.
var glyphs = []; var glyphs = [];
if (encoding.empty) { var deltas = [];
var orderedGlyphs= []; for (var j = 0; j < 256; j++) {
for ( var j = 0; j < charset.length; j++) { var index = font.getByte();
var unicode = GlyphsUnicode[charset[font.getByte()]] || 0; if (index) {
glyphs.push({ unicode: unicode }); deltas.push(index);
orderedGlyphs.push(unicode); glyphs.push({ unicode : j });
}
orderedGlyphs.sort(function(a, b) {
return a - b;
});
for (var p in encoding) {
if (p != "empty")
properties.encoding[p] = orderedGlyphs[p - 1];
}
} else {
for (var j = 0x20; j < 256; j++) {
// TODO do not hardcode WinAnsiEncoding
var unicode = GlyphsUnicode[Encodings["WinAnsiEncoding"][j]];
glyphs.push({ unicode: unicode });
} }
} }
cmap.data = createCMapTable(glyphs); cmap.data = createCMapTable(glyphs, deltas);
} else if (format == 6 && numRecords == 1 && !encoding.empty) { } else if (format == 6 && numRecords == 1 && !encoding.empty) {
// Format 0 alone is not allowed by the sanitizer so let's rewrite // Format 0 alone is not allowed by the sanitizer so let's rewrite
// that to a 3-1-4 Unicode BMP table // that to a 3-1-4 Unicode BMP table

3
pdf.js
View File

@ -3722,9 +3722,8 @@ var PartialEvaluator = (function() {
var baseName = encoding.get('BaseEncoding'); var baseName = encoding.get('BaseEncoding');
if (baseName) { if (baseName) {
var base = Encodings[baseName.name]; var base = Encodings[baseName.name];
var index = 0;
for (var j = 0, end = base.length; j < end; j++) for (var j = 0, end = base.length; j < end; j++)
encodingMap[index++] = GlyphsUnicode[base[j]]; encodingMap[j] = GlyphsUnicode[base[j]] || 0;
} else { } else {
TODO('need to load default encoding'); TODO('need to load default encoding');
} }