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Add fallback for non-embedded "Century Gothic" CIDFontType2 font (issue 4722 and bug 879561)

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According to practical experiments, falling back to "Helvetica" when we encounter a non-embedded "[Century Gothic](http://en.wikipedia.org/wiki/Century_Gothic)" `CIDFontType2` font seems to work well.
(Also, the section on Wikipedia about "Printer ink usage" *might* provide some anecdotal evidence that Century Gothic is a fairly standard sans-serif font.)

Obviously this patch doesn't make "Century Gothic" fonts render perfectly, as is often the case with non-embedded fonts, but all the text is now legible in the referenced issues.

Fixes 4722.
Fixes https://bugzilla.mozilla.org/show_bug.cgi?id=879561.
This commit is contained in:
Jonas Jenwald 2014-12-11 17:29:26 +01:00
parent a018e933ea
commit d8b905048b
4 changed files with 127 additions and 1 deletions
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10
src/core/fonts.js
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@ -320,9 +320,12 @@ var stdFontMap = {
'CourierNewPS-BoldMT': 'Courier-Bold',
'CourierNewPS-ItalicMT': 'Courier-Oblique',
'CourierNewPSMT': 'Courier',
'Helvetica': 'Helvetica',
'Helvetica-Bold': 'Helvetica-Bold',
'Helvetica-BoldItalic': 'Helvetica-BoldOblique',
'Helvetica-BoldOblique': 'Helvetica-BoldOblique',
'Helvetica-Italic': 'Helvetica-Oblique',
'Helvetica-Oblique':'Helvetica-Oblique',
'Symbol-Bold': 'Symbol',
'Symbol-BoldItalic': 'Symbol',
'Symbol-Italic': 'Symbol',
@ -348,6 +351,10 @@ var stdFontMap = {
* fonts without glyph data.
*/
var nonStdFontMap = {
'CenturyGothic': 'Helvetica',
'CenturyGothic-Bold': 'Helvetica-Bold',
'CenturyGothic-BoldItalic': 'Helvetica-BoldOblique',
'CenturyGothic-Italic': 'Helvetica-Oblique',
'ComicSansMS': 'Comic Sans MS',
'ComicSansMS-Bold': 'Comic Sans MS-Bold',
'ComicSansMS-BoldItalic': 'Comic Sans MS-BoldItalic',
@ -2455,7 +2462,8 @@ var Font = (function FontClosure() {
// The file data is not specified. Trying to fix the font name
// to be used with the canvas.font.
var fontName = name.replace(/[,_]/g, '-');
var isStandardFont = fontName in stdFontMap;
var isStandardFont = !!stdFontMap[fontName] ||
(nonStdFontMap[fontName] && !!stdFontMap[nonStdFontMap[fontName]]);
fontName = stdFontMap[fontName] || nonStdFontMap[fontName] || fontName;
this.bold = (fontName.search(/bold/gi) !== -1);