Sakurai/pdf.js
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Try to skip mapping of missing glyphs.

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This commit is contained in:
Brendan Dahl 2014-10-03 10:35:49 -07:00 committed by Jonas Jenwald
parent ccf05c7a41
commit cb27707277
1 changed files with 17 additions and 14 deletions
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31
src/core/fonts.js
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@ -2675,17 +2675,12 @@ var Font = (function FontClosure() {
var fontCharCode = originalCharCode;
// First try to map the value to a unicode position if a non identity map
// was created.
if (!isIdentityUnicode) {
if (toUnicode.get(originalCharCode) !== undefined) {
var unicode = toUnicode.get(fontCharCode);
// TODO: Try to map ligatures to the correct spot.
if (unicode.length === 1) {
fontCharCode = unicode.charCodeAt(0);
}
} else if (isCidFontType2) {
// For CIDFontType2, move characters not present in toUnicode
// to the private use area (fixes bug 1028735 and issue 4881).
fontCharCode = nextAvailableFontCharCode;
// console.log(fontCharCode);
if (!isIdentityUnicode && toUnicode.get(originalCharCode) !== undefined) {
var unicode = toUnicode.get(fontCharCode);
// TODO: Try to map ligatures to the correct spot.
if (unicode.length === 1) {
fontCharCode = unicode.charCodeAt(0);
}
}
// Try to move control characters, special characters and already mapped
@ -3526,6 +3521,7 @@ var Font = (function FontClosure() {
var newGlyfData = new Uint8Array(oldGlyfDataLength);
var startOffset = itemDecode(locaData, 0);
var writeOffset = 0;
var missingGlyphData = {};
itemEncode(locaData, 0, writeOffset);
var i, j;
for (i = 0, j = itemSize; i < numGlyphs; i++, j += itemSize) {
@ -3543,6 +3539,10 @@ var Font = (function FontClosure() {
continue;
}
if (startOffset === endOffset) {
missingGlyphData[i] = true;
}
var newLength = sanitizeGlyph(oldGlyfData, startOffset, endOffset,
newGlyfData, writeOffset, hintsValid);
writeOffset += newLength;
@ -3559,7 +3559,7 @@ var Font = (function FontClosure() {
itemEncode(locaData, j, simpleGlyph.length);
}
glyf.data = simpleGlyph;
return;
return missingGlyphData;
}
if (dupFirstEntry) {
@ -3576,6 +3576,7 @@ var Font = (function FontClosure() {
} else {
glyf.data = newGlyfData.subarray(0, writeOffset);
}
return missingGlyphData;
}
function readPostScriptTable(post, properties, maxpNumGlyphs) {
@ -4035,10 +4036,11 @@ var Font = (function FontClosure() {
sanitizeHead(tables.head, numGlyphs, isTrueType ? tables.loca.length : 0);
var missingGlyphs = {};
if (isTrueType) {
var isGlyphLocationsLong = int16(tables.head.data[50],
tables.head.data[51]);
sanitizeGlyphLocations(tables.loca, tables.glyf, numGlyphs,
missingGlyphs = sanitizeGlyphLocations(tables.loca, tables.glyf, numGlyphs,
isGlyphLocationsLong, hintsValid, dupFirstEntry);
}
@ -4073,7 +4075,8 @@ var Font = (function FontClosure() {
} else if (cidToGidMap[cid] !== undefined) {
glyphId = cidToGidMap[cid];
}
if (glyphId >= 0 && glyphId < numGlyphs) {
if (glyphId >= 0 && glyphId < numGlyphs && !missingGlyphs[charCode]) {
charCodeToGlyphId[charCode] = glyphId;
}
});