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Guess default width for FileFont3 using BaseFont

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notmasteryet 2011-09-21 19:56:09 -05:00
parent ba04d850f8
commit 2248690d11
1 changed files with 53 additions and 29 deletions
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82
pdf.js
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@ -4483,6 +4483,32 @@ var PartialEvaluator = (function() {
return glyphs;
},
getBaseFontMetrics: function(baseFontName) {
var map = {};
if (/^Symbol(-?(Bold|Italic))*$/.test(baseFontName)) {
// special case for symbols
var encoding = Encodings.symbolsEncoding;
for (var i = 0, n = encoding.length, j; i < n; i++) {
if (!(j = encoding[i]))
continue;
map[i] = GlyphsUnicode[j] || 0;
}
}
var defaultWidth = 0;
var widths = Metrics[stdFontMap[baseFontName] || baseFontName];
if (IsNum(widths)) {
defaultWidth = widths;
widths = null;
}
return {
defaultWidth: defaultWidth,
widths: widths || [],
map: map
};
},
translateFont: function(dict, xref, resources) {
var baseDict = dict;
var type = dict.get('Subtype');
@ -4518,30 +4544,15 @@ var PartialEvaluator = (function() {
return null;
// Using base font name as a font name.
baseFontName = baseFontName.name;
var map = {};
if (/^Symbol(-?(Bold|Italic))*$/.test(baseFontName)) {
// special case for symbols
var encoding = Encodings.symbolsEncoding;
for (var i = 0, n = encoding.length, j; i < n; i++) {
if (!(j = encoding[i]))
continue;
map[i] = GlyphsUnicode[j] || 0;
}
}
baseFontName = baseFontName.name.replace(/,/g, '_');
var metrics = this.getBaseFontMetrics(baseFontName);
var defaultWidth = 0;
var widths = Metrics[stdFontMap[baseFontName] || baseFontName];
if (IsNum(widths)) {
defaultWidth = widths;
widths = null;
}
var properties = {
type: type.name,
encoding: map,
encoding: metrics.map,
differences: [],
widths: widths || {},
defaultWidth: defaultWidth,
widths: metrics.widths,
defaultWidth: metrics.defaultWidth,
firstChar: 0,
lastChar: 256
};
@ -4561,7 +4572,25 @@ var PartialEvaluator = (function() {
// a variant.
var firstChar = xref.fetchIfRef(dict.get('FirstChar')) || 0;
var lastChar = xref.fetchIfRef(dict.get('LastChar')) || 256;
var widths = xref.fetchIfRef(dict.get('Widths')) || [];
var defaultWidth = 0;
var glyphWidths = {};
var encoding = {};
var widths = xref.fetchIfRef(dict.get('Widths'));
if (widths) {
for (var i = 0, j = firstChar; i < widths.length; i++, j++)
glyphWidths[j] = widths[i];
defaultWidth = parseFloat(descriptor.get('MissingWidth')) || 0;
} else {
// Trying get the BaseFont metrics (see comment above).
var baseFontName = dict.get('BaseFont');
if (IsName(baseFontName)) {
var metrics = this.getBaseFontMetrics(baseFontName.name);
glyphWidths = metrics.widths;
defaultWidth = metrics.defaultWidth;
encoding = metrics.map;
}
}
var fontName = xref.fetchIfRef(descriptor.get('FontName'));
assertWellFormed(IsName(fontName), 'invalid font name');
@ -4600,17 +4629,12 @@ var PartialEvaluator = (function() {
descent: descriptor.get('Descent'),
xHeight: descriptor.get('XHeight'),
capHeight: descriptor.get('CapHeight'),
defaultWidth: parseFloat(descriptor.get('MissingWidth')) || 0,
defaultWidth: defaultWidth,
flags: descriptor.get('Flags'),
italicAngle: descriptor.get('ItalicAngle'),
differences: [],
widths: (function() {
var glyphWidths = {};
for (var i = 0; i < widths.length; i++)
glyphWidths[firstChar++] = widths[i];
return glyphWidths;
})(),
encoding: {}
widths: glyphWidths,
encoding: encoding
};
properties.glyphs = this.extractEncoding(dict, xref, properties);