[Gnash-dev] PATCH: gnash 0.8.5: match TTF fonts on the fullname attribute

[Bernd Kischnick]

Hi all,

this is a patch for gnash 0.8.5.

gnash refused to display bold fonts for us, displaying a completely  
different font instead.
This turned out to be caused by the encoding of the font in the SWF in  
combination with the font-matching rules of the freetype2 library.

If you use TextFields with the option "use device fonts" (in Adobe  
Flash), then the font name and properties are encoded into the SWF.  
The encoding seems to combine the font family name and the font style  
in a single string.
e.g., you try to use font family "DejaVu Sans", style "Bold", then the  
SWF contains the font name "DejaVu Sans Bold".

gnash 0.8.5 passes this string to the freetype library to match, using  
function FcNameParse().
But freetype essentially matches the name on the font family attribute  
only, so it tries and fails to find fonts with font family "DejaVu  
Sans Bold", and returns a default sans-serif font instead. (Observed  
with freetype2 2.3.7)
In fact the string used by flash is present as the "fullname"  
attribute in the fonts. Freetype doesn't allow for a simple match on  
the "fullname" attribute, so we enumerate all the fonts find a match.

I've not checked whether gnash 0.8.6 or 0.8.7 show the same behaviour.
Also, one could argue that freetype should be enhanced instead of gnash.

- Bernd Kischnick

gnash-0.8.5-fontnamematching.patch
Description: Binary data