Fontconfig - Jul 2008 - Is code point substitution inside the same font possible with fontconfing?

Briefly, I want to alter the code point of a request before passing it
to the font library (freetype2 in my case). The recoding that needs to
happen is from U+021A/B to U+162/3. This is quite useful for new
Romanian documents rendered with old/free Type-1 fonts (details here:
https://fedoraproject.org/wiki/L10N/Tasks/Ro_fonts#Type-1_fonts_need_an_additional_mapping_from_U.2B021A.2FB_to_U.2B162.2F3)
Microsoft''s Uniscribe does this automagically for type-1 fonts (but
not for OTF/CFF ones, which handle stuff like this with GSUB tables).
I''m trying to implement this behavior using fontconfig, but after
carefully reading the manual for the config file, it doesn''t seem
possible. Do I have to write a C hack, or am I missing something?

Le samedi 19 juillet 2008 ? 23:00 +0300, Vasile Gaburici a ?crit
:
> Briefly, I want to alter the code point of a request before passing it
> to the font library (freetype2 in my case). The recoding that needs to
> happen is from U+021A/B to U+162/3. This is quite useful for new
> Romanian documents rendered with old/free Type-1 fonts (details here:
>
https://fedoraproject.org/wiki/L10N/Tasks/Ro_fonts#Type-1_fonts_need_an_additional_mapping_from_U.2B021A.2FB_to_U.2B162.2F3)
See also http://fedoraproject.org/wiki/Talk:L10N/Tasks/Ro_fonts

-- 
Nicolas Mailhot
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On Sat, 2008-07-19 at 23:00 +0300, Vasile Gaburici wrote:
>  Do I have to write a C hack, or am I missing something?
Yup, you''ll want to go hack the fontconfig code itself so that the
correct language support is registered. Then, if you application also
happens to use the fontconfig glyph lookup code (does anyone use that at
this point?) things will work fine. Otherwise, you''ll also have to
change your application or toolkit.

-- 
keith.packard at intel.com
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On Sat, 2008-07-19 at 16:21 -0700, Keith Packard wrote:
> fontconfig glyph lookup code (does anyone use that at this point?)
Pango does.  Cairo doesn''t.  Should I make cairo do too?

-- 
behdad
http://behdad.org/

"Those who would give up Essential Liberty to purchase a little
 Temporary Safety, deserve neither Liberty nor Safety."
        -- Benjamin Franklin, 1759

On Sun, 2008-07-20 at 20:08 +0100, Behdad Esfahbod
wrote:
> On Sat, 2008-07-19 at 16:21 -0700, Keith Packard wrote:
> > fontconfig glyph lookup code (does anyone use that at this point?)
> 
> Pango does.  Cairo doesn''t.  Should I make cairo do too?
It''s not a terrible idea; fontconfig deals with a few oddities
including
postscript symbol fonts. Of course, using bare cairo Unicode functions
isn''t the best plan, but there''s no reason to make it even
less useful.

-- 
keith.packard at intel.com
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