[HarfBuzz] Ligatures and color changes

[Lóránt Pintér]

I'm trying this with a font that has the kerning data in the "kern" table as well as in the "GPOS" table. (Is that possible?)  

Can you show me a font that this feature works with?  

--  
Lóránt Pintér
Developer at Prezi (http://prezi.com)



On Wednesday, February 20, 2013 at 10:26 AM, Jonathan Kew wrote:

> On 19/2/13 23:35, Lóránt Pintér wrote:
> > Using ZWNJ would be a great way of fixing it. And indeed it splits the
> > ligature all right, but it also destroys the kerning. Here's a little
> > test I did with HarfBuzz @ e0486fc1affd3796fb8f664e2e7fc208f1d2106c:
> > (the font has an "fi" ligature, and has some kerning between "F" and ",")
> >  
> > Splitting the ligature with the ZWNJ works:
> >  
> > Shaped "fif\u200Ci" with features: [ ]
> > Glyph: #682, x_advance: 652
> > Glyph: #71, x_advance: 380
> > Glyph: #3, x_advance: 0
> > Glyph: #74, x_advance: 292
> >  
> > Kerning across the ZWNJ does not:
> >  
> > Shaped "F,F\u200C," with features: [ ]
> > Glyph: #39, x_advance: 483
> > Glyph: #13, x_advance: 242
> > Glyph: #39, x_advance: 563
> > Glyph: #3, x_advance: 0
> > Glyph: #13, x_advance: 242
> >  
> > Is it possible that doing this will be supported later in HarfBuzz?
>  
> Hmm - is that font using a legacy 'kern' table, or a GPOS 'kern'  
> feature? For the former, I can understand that kerning would break, as  
> it's a naïve glyph-pair lookup, but for the latter, I thought we should  
> now ignore the ZWNJ.
>  
> JK  

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/harfbuzz/attachments/20130220/78a42024/attachment.html>