Re: can Context render complex scripts?

From: Hans Hagen <pragma@wxs.nl>
To: Michael Saunders <odradek5@gmail.com>
Cc: ntg-context@ntg.nl, ishamid@colostate.edu
Subject: Re: can Context render complex scripts?
Date: Sun, 13 Jun 2010 21:07:55 +0200	[thread overview]
Message-ID: <4C152C8B.8030404@wxs.nl> (raw)
In-Reply-To: <AANLkTimT7lBCSiQPB9GPE-oDY3_q5snSt3UoaeKgXiji@mail.gmail.com>

On 13-6-2010 6:58, Michael Saunders wrote:
>> next time make a simple example .. you caniidentity features with
>>
>> mtxrun --script font --info --list --file BNBDOT0N.ttf
>>
>> anyhow, only one features is applied. It lookslike some gpos feature is not
>> used.
>>
>> \usemodule[fnt-20]
>>
>> \definefontfeature
>>   [indic]
>>   [mode=node,analyze=yes,
>>    script=beng,language=dflt,
>>    % gsub
>>    abvs=yes,akhn=yes,blwf=yes,blws=yes,
>>    half=yes,nukt=yes,pstf=yes,psts=yes,rphf=yes,
>>    % gpos
>>    blwm=yes,abvm=yes]
>>
>> \definefontsynonym[dwbangla][file:BNBDOT0N.ttf]
>>
>> \starttext
>>
>>     {\definedfont[dwbangla*indic] সত্যজিৎ রায় \par}
>>
>>     \showotfcomposition
>>         {dwbangla*indic}
>>         {0}
>>         {সত্যজিৎ রায়}
>>
>> \stoptext
>
>
> I don't understand---are you saying this is supposed to work?  Is the

well, i wrote: it looks like some pos feaure is not applied ...

> trick supposed to be using fnt-20 or in being careful not to turn on
> unused features?  (To be on the safe side, since I was switching

no, but turning them on makes tracing cumbersome

> between them in testing, I was turning on all the features Microsoft
> calls Indic.)  I tried your example and, yes, one shaping looks
> correct, but there was no reordering and now some of the characters
> print out on top of each other (which is incorrect).  I tried the same
> routine, using  fnt-20 and commenting out unused features, for some
> other fonts:

> What am I missing?

As Khaled mentioned ... are these proper otf fonts or do they rely on 
specific features in the microsoft engine?

Most opentype features are quite generic and should work ok but if 
something special is needed more info is needed.

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________