Sakurai/pdf.js
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Remap all glyphs to Unicode Private Use Area if it is possible otherwise only remap minimum problematic glyphs

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This commit is contained in:
Adil Allawi 2011-10-05 08:42:13 +01:00
parent 3645ebe42c
commit 535dc8cd7b
1 changed files with 7 additions and 8 deletions
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15
fonts.js
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@ -13,9 +13,6 @@ var kMaxWaitForFontFace = 1000;
var kCmapGlyphOffset = 0xE000; var kCmapGlyphOffset = 0xE000;
var kSizeOfGlyphArea = 0x1900; var kSizeOfGlyphArea = 0x1900;
//start of CJK block
var kUnicodeCJKStart = 0x2E80;
// PDF Glyph Space Units are one Thousandth of a TextSpace Unit // PDF Glyph Space Units are one Thousandth of a TextSpace Unit
// except for Type 3 fonts // except for Type 3 fonts
var kPDFGlyphSpaceUnits = 1000; var kPDFGlyphSpaceUnits = 1000;
@ -1220,21 +1217,23 @@ var Font = (function Font() {
// offsetting glyphs to avoid problematic unicode ranges should only be // offsetting glyphs to avoid problematic unicode ranges should only be
// done for fonts with a medium-sized glyph count otherwise we could // done for fonts with a medium-sized glyph count otherwise we could
// overflow the glyph range or overwrite existing glyph positions // overflow the glyph range or overwrite existing glyph positions
var cmapGlyphOffset = numGlyphs < kSizeOfGlyphArea ? kCmapGlyphOffset : 0; var canRemapAllGlyphs = numGlyphs < kSizeOfGlyphArea;
for (i in encoding) { for (i in encoding) {
if (encoding.hasOwnProperty(i)) { if (encoding.hasOwnProperty(i)) {
var unicode = encoding[i].unicode; var unicode = encoding[i].unicode;
if (unicode <= 0x1f || (unicode >= 127 && unicode <= kSizeOfGlyphArea)) if (canRemapAllGlyphs || unicode <= 0x1f ||
encoding[i].unicode = unicode += cmapGlyphOffset; (unicode >= 127 && unicode <= 255))
encoding[i].unicode += kCmapGlyphOffset;
} }
} }
var glyphs = []; var glyphs = [];
for (i = 1; i < numGlyphs; i++) { for (i = 1; i < numGlyphs; i++) {
glyphs.push({ glyphs.push({
unicode: i <= 0x1f || (i >= 127 && i < kSizeOfGlyphArea) ? unicode: canRemapAllGlyphs ||
i + cmapGlyphOffset : i i <= 0x1f || (i >= 127 && i < kSizeOfGlyphArea) ?
i + kCmapGlyphOffset : i
}); });
} }
cmap.data = createCMapTable(glyphs); cmap.data = createCMapTable(glyphs);