[HarfBuzz] 'calt' in Indic shaper

[John Hudson]

On 07/08/13 3:45 AM, Jonathan Kew wrote:

> The Indic 'calt' discrepancy we ran into that triggered this question
> appears to actually be the features-across-cluster-boundaries issue. In
> uniscribe, 'calt' does not apply across cluster boundaries; in harfbuzz,
> it does. This leads to many unexpected differences: e.g. in Gujarati,
> the "pseudo-ligation" of <U+0A9C,U+0AAF>

Are you referring to the Nirmala fonts again? I think this is a font 
bug, and the context for the connecting -Ya is incorrect. This 
substitution should only be happening in conjuncts, so the full form Ja 
should not be acting as a trigger.

I'm working on some Nirmala UI fixes at the moment, so will address this.


JH


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