diacritic marks for Latin alphabet (Re: supporting XIM)

[Jungshik Shin <jshin@xxxxxxxxxxx>]

Edward Cherlin wrote:

> On Monday 31 March 2003 06:38 am, Gaspar Sinai wrote:
>  
>
> > On Sun, 30 Mar 2003, Edward Cherlin wrote:
> >    
> >
> > > Let's try some more.
> > > á̀ế̀̀î́̀ổ́̀̀û̀̀n̂́̀x̂̉́̀̀
> > > Not too bad, except that only the first three accents on
> > > each letter are actually displayed, and the dot on the i
> > > isn't removed. 
 Hmm, I can see only two diacritics in Kwrite with Code2000 font.
I found that you appended as many as five of them to each character
in your sample.  What font did you use? Nonetheless, it's a pleasant
surprise that Kwrite does more than simple overstriking.

> > > What do you see in your mail?
> > >      
> > Yudit currently supports Mark-To-Base and Mark-To-Mark
> > (2.7.5.beta10) OpenType GPOS and it uses GSUB only for Indic
> > scripts, ligatures and shaping. Resonable Tibetan (almost
> > ready) also needs all of these complexities.
> >
> > If there is an urgent need for this in other scripts I can
> > take a look at it. 
> >    
>
> Not in Latin-alphabet text generally. Writing systems that have 
> such needs include Vietnamese, IPA, Math, Polytonic Greek, 
>  
 Does Vietnamese need diacritic marks ? Sure, it does, but
I think all it needs are encoded as precomposed so that
they don't need a special treatment other than the conversion between
NFC and NFD.

> Indic and South Asian are much higher priority than multiply 
> accented Latin for mathematicians.
>  
  That's why Indic scripts are rather well supported in Yudit now :-)

> > Is it possible to define all the combinations in GPOS and GSUB
> > tables in the font at all?
> >    

   It seems like this is where AAT fonts with state machine are superior to
opentype fonts.

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