[HarfBuzz] tibetan marks

[Behdad Esfahbod]

On 13-10-20 07:35 PM, Jonathan Kew wrote:
> Turns out that zeroing marks by GDEF in Tibetan (commit
> d5bd0590ae2fbc7b0dee86385a565aef00ffb835) has significantly regressed our
> numbers for the Windows himalaya.ttf font. :(
> 
> The main problem seems to be the handling of
> 
>   0F3C;TIBETAN MARK ANG KHANG GYON;Ps;0;ON;;;;;Y;TIBETAN LEFT BRACE;;;;
>   0F3D;TIBETAN MARK ANG KHANG GYAS;Pe;0;ON;;;;;Y;TIBETAN RIGHT BRACE;;;;
> 
> both of which the GDEF table in himalaya.ttf classifies (incorrectly) as class
> 3. Result:
> 
> http://ec2-54-226-13-158.compute-1.amazonaws.com/testcase-view.html?file=out/fonts/win8/himalaya.ttf/texts/tibt/wikipedia/bo.txt.diffs#P_1_1_77
> 
> 
> and lots of similar examples where these characters are used.
> 
> Sigh.

Humm..  Any suggestions?  Any indication that zeroing by GDEF *before* GPOS
may help?  Or does it just look like magic?

> JK
> 

-- 
behdad
http://behdad.org/