[luatex] About the level of bidi implementation

Khaled Hosny khaledhosny at eglug.org
Fri Apr 10 23:22:59 CEST 2009

On Fri, Apr 10, 2009 at 10:39:58PM +0200, Yannis Haralambous wrote:
> Le 10 avr. 09 à 18:40, Idris Samawi Hamid ادريس سماوي حامد a écrit :
>> do you mean nasta`liq?
>> [By the way -- and this is by no means directed at you :-) -- SIL and 
>> others have really confused things by talking about "the Urdu script". 
>> As you know so well, Urdu uses Arabic script; it just happens to prefer 
>> the nastaliq style to the naskh style.]
> Technically speaking you have the "Monotype Urdu font" (which is not  
> really Nastaliq, but it does follow Urdu contextual analysis).
> Again technically speaking you have various "Nasta`liq fonts" using  
> Arabic contextual analysis, in fact they are simplified Nasta`liq fonts.
>> But maybe I misunderstand you: I get working nastaliq under  
>> uniscribe... am I missing something? [I'd be happy for us to start  
>> another thread on this topic]
> As you can see in the illustration below (taken from my book) Urdu  
> contextual analysis has 7 different forms: isolated (not seen in the  
> figure), initial (6), medial-odd (5), medial-even (4), pre-pre-final  
> (3), pre-final (2) and final (1). If I should continue then I would have 
> 1-2-3-4-5-4-5-4-5-...-6. The sample uses Nafees Nasta`liq.
> Well understood this kind of contextual analysis is not covered by  
> Uniscribe so it has to be specially implemented.

AFAIK, 'Nafees Nastaleeq'[1] is implemented as a pure OpenType font, it
does certainly work with Uniscribe (at its authors seem to test against
it), it does even work with ConTeXt's OpenType implementation, see the
attached PDF.



 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer
-------------- next part --------------
A non-text attachment was scrubbed...
Name: nafees.pdf
Type: application/pdf
Size: 8120 bytes
Desc: not available
Url : http://tug.org/pipermail/luatex/attachments/20090410/2d577eb7/attachment.pdf 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 197 bytes
Desc: Digital signature
Url : http://tug.org/pipermail/luatex/attachments/20090410/2d577eb7/attachment.bin 

More information about the luatex mailing list