[HarfBuzz] Post Base Substitution fails with Malayalam repha

[Rajeesh K Nambiar]

On Fri, Sep 13, 2013 at 5:41 PM, Rajeesh K Nambiar
<rajeeshknambiar at gmail.com> wrote:

>
> I guess it would be easiest for us to update the fonts if Dotreph is
> not reordered at all.
> Also see an earlier discussion -
> http://lists.freedesktop.org/archives/harfbuzz/2013-July/003433.html
>

Found another issue with Dotreph in conjunction with 'akhn' rules.
Font Rachana: http://rajeeshknambiar.fedorapeople.org/smc-fonts-6.0/Rachana-6.0.ttf
At the moment, it has 'akhn' rule for <Dotreph+Cha+Virama+Cha> mapped
to glyph dotrephch1ch1.

The word 'ചൎച്ച്' <Cha+Dotreph+Cha+Virama+Cha+Virama> is incorrectly
shaped - the final Virama is reordered before
<Dotreph+Cha+Virama+Cha>.
hb-shape output: [ch1=0+1488|xx=1+184|dotrephch1ch1=1+1488]
Correct output: [ch1,dotrephch1ch1,xx].


---
Cheers,
Rajeesh