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Merge pull request #556 from notmasteryet/cid0

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Initial CID-0 font encodings
This commit is contained in:
vingtetun 2011-10-03 17:36:51 -07:00
commit 7842c65099
7 changed files with 7090 additions and 80 deletions
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6932
cidmaps.js Normal file
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109
fonts.js
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@ -429,6 +429,9 @@ var Font = (function Font() {
return;
}
// Trying to fix encoding using glyph widths and CIDSystemInfo.
this.fixWidths(properties);
if (!file) {
// The file data is not specified. Trying to fix the font name
// to be used with the canvas.font.
@ -443,6 +446,7 @@ var Font = (function Font() {
this.defaultWidth = properties.defaultWidth;
this.loadedName = fontName.split('-')[0];
this.composite = properties.composite;
this.loading = false;
return;
}
@ -1208,25 +1212,11 @@ var Font = (function Font() {
}
var encoding = properties.encoding, i;
if (!encoding[0]) {
// the font is directly characters to glyphs with no encoding
// so create an identity encoding
var widths = properties.widths;
for (i = 0; i < numGlyphs; i++) {
var width = widths[i];
encoding[i] = {
unicode: i <= 0x1f || (i >= 127 && i <= 255) ?
i + kCmapGlyphOffset : i,
width: isNum(width) ? width : properties.defaultWidth
};
}
} else {
for (i in encoding) {
if (encoding.hasOwnProperty(i)) {
var unicode = encoding[i].unicode;
if (unicode <= 0x1f || (unicode >= 127 && unicode <= 255))
encoding[i].unicode = unicode += kCmapGlyphOffset;
}
for (i in encoding) {
if (encoding.hasOwnProperty(i)) {
var unicode = encoding[i].unicode;
if (unicode <= 0x1f || (unicode >= 127 && unicode <= 255))
encoding[i].unicode = unicode += kCmapGlyphOffset;
}
}
@ -1402,6 +1392,87 @@ var Font = (function Font() {
return stringToArray(otf.file);
},
fixWidths: function font_fixWidths(properties) {
if (properties.type !== 'CIDFontType0' &&
properties.type !== 'CIDFontType2')
return;
var encoding = properties.encoding;
if (encoding[0])
return;
var glyphsWidths = properties.widths;
if (!glyphsWidths)
return;
var defaultWidth = properties.defaultWidth;
var cidSystemInfo = properties.cidSystemInfo;
var cidToUnicode;
if (cidSystemInfo) {
cidToUnicode = CIDToUnicodeMaps[
cidSystemInfo.registry + '-' + cidSystemInfo.ordering];
}
if (!cidToUnicode) {
// the font is directly characters to glyphs with no encoding
// so create an identity encoding
for (i = 0; i < 0xD800; i++) {
var width = glyphsWidths[i];
encoding[i] = {
unicode: i,
width: isNum(width) ? width : defaultWidth
};
}
// skipping surrogates + 256-user defined
for (i = 0xE100; i <= 0xFFFF; i++) {
var width = glyphsWidths[i];
encoding[i] = {
unicode: i,
width: isNum(width) ? width : defaultWidth
};
}
return;
}
encoding[0] = { unicode: 0, width: 0 };
var glyph = 1, i, j, k;
for (i = 0; i < cidToUnicode.length; ++i) {
var unicode = cidToUnicode[i];
var width;
if (isArray(unicode)) {
var length = unicode.length;
width = glyphsWidths[glyph];
for (j = 0; j < length; j++) {
k = unicode[j];
encoding[k] = {
unicode: k,
width: isNum(width) ? width : defaultWidth
};
}
glyph++;
} else if (typeof unicode === 'object') {
var fillLength = unicode.f;
if (fillLength) {
k = unicode.c;
for (j = 0; j < fillLength; ++j) {
width = glyphsWidths[glyph++];
encoding[k] = {
unicode: k,
width: isNum(width) ? width : defaultWidth
};
k++;
}
} else
glyph += unicode.s;
} else if (unicode) {
width = glyphsWidths[glyph++];
encoding[unicode] = {
unicode: unicode,
width: isNum(width) ? width : defaultWidth
};
} else
glyph++;
}
},
bindWorker: function font_bindWorker(data) {
postMessage({
action: 'font',

120
pdf.js
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@ -4455,72 +4455,70 @@ var PartialEvaluator = (function partialEvaluator() {
properties) {
var type = properties.type, encoding;
if (properties.composite) {
if (type == 'CIDFontType2') {
var defaultWidth = xref.fetchIfRef(dict.get('DW')) || 1000;
properties.defaultWidth = defaultWidth;
var defaultWidth = xref.fetchIfRef(dict.get('DW')) || 1000;
properties.defaultWidth = defaultWidth;
var glyphsWidths = {};
var widths = xref.fetchIfRef(dict.get('W'));
if (widths) {
var start = 0, end = 0;
for (var i = 0; i < widths.length; i++) {
var code = widths[i];
if (isArray(code)) {
for (var j = 0; j < code.length; j++)
glyphsWidths[start++] = code[j];
start = 0;
} else if (start) {
var width = widths[++i];
for (var j = start; j <= code; j++)
glyphsWidths[j] = width;
start = 0;
} else {
start = code;
}
}
}
properties.widths = glyphsWidths;
var cidToGidMap = dict.get('CIDToGIDMap');
if (!cidToGidMap || !isRef(cidToGidMap)) {
return Object.create(GlyphsUnicode);
}
// Extract the encoding from the CIDToGIDMap
var glyphsStream = xref.fetchIfRef(cidToGidMap);
var glyphsData = glyphsStream.getBytes(0);
// Glyph ids are big-endian 2-byte values
encoding = properties.encoding;
// Set encoding 0 to later verify the font has an encoding
encoding[0] = { unicode: 0, width: 0 };
for (var j = 0; j < glyphsData.length; j++) {
var glyphID = (glyphsData[j++] << 8) | glyphsData[j];
if (glyphID == 0)
continue;
var code = j >> 1;
var width = glyphsWidths[code];
encoding[code] = {
unicode: glyphID,
width: isNum(width) ? width : defaultWidth
};
}
} else if (type == 'CIDFontType0') {
if (isName(encoding)) {
// Encoding is a predefined CMap
if (encoding.name == 'Identity-H') {
TODO('Need to create an identity cmap');
var glyphsWidths = {};
var widths = xref.fetchIfRef(dict.get('W'));
if (widths) {
var start = 0, end = 0;
for (var i = 0; i < widths.length; i++) {
var code = widths[i];
if (isArray(code)) {
for (var j = 0; j < code.length; j++)
glyphsWidths[start++] = code[j];
start = 0;
} else if (start) {
var width = widths[++i];
for (var j = start; j <= code; j++)
glyphsWidths[j] = width;
start = 0;
} else {
TODO('Need to support predefined CMaps see PDF 32000-1:2008 ' +
'9.7.5.2 Predefined CMaps');
start = code;
}
} else {
TODO('Need to support encoding streams see PDF 32000-1:2008 ' +
'9.7.5.3');
}
}
properties.widths = glyphsWidths;
// Glyph ids are big-endian 2-byte values
encoding = properties.encoding;
// CIDSystemInfo might help to match width and glyphs
var cidSystemInfo = dict.get('CIDSystemInfo');
if (isDict(cidSystemInfo)) {
properties.cidSystemInfo = {
registry: cidSystemInfo.get('Registry'),
ordering: cidSystemInfo.get('Ordering'),
supplement: cidSystemInfo.get('Supplement')
};
}
var cidToGidMap = dict.get('CIDToGIDMap');
if (!cidToGidMap || !isRef(cidToGidMap)) {
return Object.create(GlyphsUnicode);
}
// Extract the encoding from the CIDToGIDMap
var glyphsStream = xref.fetchIfRef(cidToGidMap);
var glyphsData = glyphsStream.getBytes(0);
// Set encoding 0 to later verify the font has an encoding
encoding[0] = { unicode: 0, width: 0 };
for (var j = 0; j < glyphsData.length; j++) {
var glyphID = (glyphsData[j++] << 8) | glyphsData[j];
if (glyphID == 0)
continue;
var code = j >> 1;
var width = glyphsWidths[code];
encoding[code] = {
unicode: glyphID,
width: isNum(width) ? width : defaultWidth
};
}
return Object.create(GlyphsUnicode);
}

1
test/pdfs/tcpdf_033.pdf.link Normal file
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@ -0,0 +1 @@
http://www.tcpdf.org/examples/example_033.pdf

6
test/test_manifest.json
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@ -170,5 +170,11 @@
"rounds": 1,
"skipPages": [ 16 ],
"type": "load"
},
{ "id": "tcpdf_033",
"file": "pdfs/tcpdf_033.pdf",
"link": true,
"rounds": 1,
"type": "eq"
}
]

1
test/test_slave.html
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@ -8,6 +8,7 @@
<script type="text/javascript" src="/glyphlist.js"></script>
<script type="text/javascript" src="/metrics.js"></script>
<script type="text/javascript" src="/charsets.js"></script>
<script type="text/javascript" src="/cidmaps.js"></script>
<script type="text/javascript" src="driver.js"></script>
</head>

1
web/viewer.html
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@ -12,6 +12,7 @@
<script type="text/javascript" src="../glyphlist.js"></script>
<script type="text/javascript" src="../metrics.js"></script>
<script type="text/javascript" src="../charsets.js"></script>
<script type="text/javascript" src="../cidmaps.js"></script>
</head>
<body>