Sakurai/pdf.js
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Change cmap encoding for Type 1

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notmasteryet 2011-10-29 09:29:19 -05:00
parent 38372ee2f2
commit 343e174951
1 changed files with 26 additions and 3 deletions
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29
src/fonts.js
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@ -729,6 +729,12 @@ function isAdaptedUnicode(unicode) {
unicode < kCmapGlyphOffset + kSizeOfGlyphArea;
}
function isSpecialUnicode(unicode) {
return (unicode <= 0x1F || (unicode >= 127 && unicode < kSizeOfGlyphArea)) ||
unicode >= kCmapGlyphOffset &&
unicode < kCmapGlyphOffset + kSizeOfGlyphArea;
}
/**
* 'Font' is the class the outside world should use, it encapsulate all the font
* decoding logics whatever type it is (assuming the font type is supported).
@ -2744,11 +2750,28 @@ CFF.prototype = {
getOrderedCharStrings: function cff_getOrderedCharStrings(glyphs,
properties) {
var charstrings = [];
for (var i = 0; i < glyphs.length; i++) {
var reverseMapping = {};
var encoding = properties.baseEncoding;
var differences = properties.differences;
var i, length;
for (i = 0, length = encoding.length; i < length; ++i) {
if (encoding[i] && !isSpecialUnicode(i))
reverseMapping[encoding[i]] = i;
}
for (i = 0, length = differences.length; i < length; ++i) {
if (differences[i] && !isSpecialUnicode(i))
reverseMapping[differences[i]] = i;
}
reverseMapping['.notdef'] = 0;
var unusedUnicode = kCmapGlyphOffset;
for (i = 0, length = glyphs.length; i < length; i++) {
var item = glyphs[i];
var glyphName = item.glyph;
var unicode = glyphName in reverseMapping ?
reverseMapping[glyphName] : unusedUnicode++;
charstrings.push({
glyph: item.glyph,
unicode: adaptUnicode(i),
glyph: glyphName,
unicode: unicode,
gid: i,
charstring: item.data,
width: item.width,