RE: [Indic-computing-devel] Testing OpenType support

[Arun M <ar...@fr...>]

> I am confused. Why do you think that this is not the right thing for
> Malayalam?
> According to the Unicode encoding model, consonant + virama + ZWNJ
> should render a visible Halant. In Uniscribe, ICU and Pango, this causes
> lookups in feature 'haln' to be applied. Therefore the feature 'haln'
> should only be used to create visible Halant forms of consonants. Do you
> think that is wrong for Malayalam?


My knowledge of OpenType is very limited. Here is the issue.
http://www.microsoft.com/typography/otfntdev/indicot/features.htm

It says for some consonants (eg NNA) halant form will be represented by
chillaksharam. My understanding is <NNA><virama>  will form chillu NNA. 
<NNA><virama><ZWNJ> will make virama visible as it is and consonant will
be in base form. 

How does NNA+virama and NNA+virama+ZWNJ should differ ?


thanks for the response,

regards,
arun.