[luatex] tibetan font support

[Khaled Hosny]

AFAIK, the OpenType layout code that Hans wrote doesn't have an Indic
shaper, only LGC, Arabic, and CJK scripts are supported. IMO, OpenType
support for Indic scripts is where you need to look.

Regards,
 Khaled

On Tue, Jul 07, 2009 at 05:09:23PM +0200, Norbert Preining wrote:
> Hi everyone,
> 
> I am confronted with my past when I studied Tibetan, and helped people
> setting tibetan, at that time with omega.
> 
> Now we have many more freely available fonts and I want to make them
> available for (la)tex, based on luatex, aleph, or whatever.
> 
> Tibetan is written a bit like Sanskrit, so you have consonant-stacks.
> Finally fonts are somehow *decent* that they follow the same layout:
> 
> Normal Unicode glyphs are in the *right* positions, so tibetan ka in
> 0F40, etc.
> 
> And consonant stacks that are pre-formed are saved in some private area
> but with names conforming to what Adobe recommends. So
> 
> ka = 0F40
> ya-subscript = 0FB1
> 
> so the pre-formed glyph kya is called "uni0F400FB1"
> and so on with more (2,3,4) uni chars.
> 
> Now my question: Is there any way to handle that *automatically* in
> luatex? Or has anyone written a automatic OTP conversion tool that does
> this? The idea is:
> - basic mappings from latin chars/ascii chars to tibetan letters are
>   defined
> - if a combination of uni chars are found and the combined letter is
>   found (searching longest match first) the string is replaced by
>   the respective glyph uniXXXXYYYY etc
> 
> Thanks a lot and all the best
> 
> Norbert
> 
> -------------------------------------------------------------------------------
> Dr. Norbert Preining <preining at logic.at>        Vienna University of Technology
> Debian Developer <preining at debian.org>                         Debian TeX Group
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> -------------------------------------------------------------------------------
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-- 
 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer
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