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Supports 'H/V', 'EUC-H/V' and '90ms*' CMaps

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This commit is contained in:
vyv03354 2013-01-15 23:20:58 +09:00
parent e61b104852
commit 38ffebc987
1 changed files with 59 additions and 4 deletions
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63
src/fonts.js
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@ -401,6 +401,48 @@ var symbolsFonts = {
'Dingbats': true, 'Symbol': true, 'ZapfDingbats': true
};
var CMapConverterList = {
'H': jis7ToUnicode,
'V': jis7ToUnicode,
'EUC-H': eucjpToUnicode,
'EUC-V': eucjpToUnicode,
'90ms-RKSJ-H': sjisToUnicode,
'90ms-RKSJ-V': sjisToUnicode,
'90msp-RKSJ-H': sjisToUnicode,
'90msp-RKSJ-V': sjisToUnicode
};
var decodeBytes;
if (typeof TextDecoder !== 'undefined') {
decodeBytes = function(bytes, encoding) {
return new TextDecoder(encoding).decode(bytes);
};
} else if (typeof FileReaderSync !== 'undefined') {
decodeBytes = function(bytes, encoding) {
return new FileReaderSync().readAsText(new Blob([bytes]), encoding);
};
} else {
// Clear the list so that decodeBytes will never be called.
CMapConverterList = {};
}
function jis7ToUnicode(str) {
var bytes = stringToBytes(str);
var length = bytes.length;
for (var i = 0; i < length; ++i) {
bytes[i] |= 0x80;
}
return decodeBytes(bytes, 'euc-jp');
}
function eucjpToUnicode(str) {
return decodeBytes(stringToBytes(str), 'euc-jp');
}
function sjisToUnicode(str) {
return decodeBytes(stringToBytes(str), 'shift_jis');
}
// Some characters, e.g. copyrightserif, mapped to the private use area and
// might not be displayed using standard fonts. Mapping/hacking well-known chars
// to the similar equivalents in the normal characters range.
@ -2282,6 +2324,7 @@ var Font = (function FontClosure() {
// Trying to fix encoding using glyph CIDSystemInfo.
this.loadCidToUnicode(properties);
this.cidEncoding = properties.cidEncoding;
if (properties.toUnicode)
this.toUnicode = properties.toUnicode;
@ -4128,8 +4171,8 @@ var Font = (function FontClosure() {
}
var cidEncoding = properties.cidEncoding;
if (cidEncoding && cidEncoding.indexOf('Uni') === 0) {
// input is already Unicode for Uni* CMap encodings.
if (cidEncoding && cidEncoding.indexOf('Identity-') !== 0) {
// input is already Unicode for non-Identity CMap encodings.
// However, Unicode-to-CID conversion is needed
// regardless of the CMap encoding. So we can't reset
// unicodeToCID.
@ -4304,8 +4347,20 @@ var Font = (function FontClosure() {
charsCache = this.charsCache = Object.create(null);
glyphs = [];
var charsCacheKey = chars;
if (this.wideChars) {
var converter;
var cidEncoding = this.cidEncoding;
if (cidEncoding) {
converter = CMapConverterList[cidEncoding];
if (converter) {
chars = converter(chars);
} else if (cidEncoding.indexOf('Uni') !== 0 &&
cidEncoding.indexOf('Identity-') !== 0) {
warn('Unsupported CMap: ' + cidEncoding);
}
}
if (!converter && this.wideChars) {
// composite fonts have multi-byte strings convert the string from
// single-byte to multi-byte
// XXX assuming CIDFonts are two-byte - later need to extract the
@ -4332,7 +4387,7 @@ var Font = (function FontClosure() {
}
// Enter the translated string into the cache
return (charsCache[chars] = glyphs);
return (charsCache[charsCacheKey] = glyphs);
}
};