[HarfBuzz] Kerning at the end of a line vs. line breaks

[Lóránt Pintér]

Having this would be wonderful. Is there a plan to do this in the near future, maybe before 1.0?  

--  
Lorant


On Wednesday, October 24, 2012 at 6:23 PM, Behdad Esfahbod wrote:

> On 12-10-23 10:43 PM, Konstantin Ritt wrote:
> > 2012/10/23 Behdad Esfahbod <behdad at behdad.org (mailto:behdad at behdad.org)>:
> > > > On 12-10-17 08:22 PM, Lóránt Pintér wrote:
> > > > > >  
> > > > > > This could work, but I would basically have to shape the whole text twice.
> > > > > > That doesn't sound right. Or does it?
> > > > > >  
> > > > >  
> > > >  
> > > >  
> > > > It actually is what you need to do, and what Pango does for example. Now, I
> > > > like to add API to HarfBuzz that would improve this, and you would essentially
> > > > just need to reshape the cluster at the linebreak position, but for now, you
> > > > need to reshape each line.
> > > >  
> > >  
> >  
> > Are you saying about re-introducing the Unicode Segmentation algorithm
> > implementation to Harfbuzz? Hope you're not :)
> >  
>  
>  
> No. Unicode segmentation algorithm is not really helpful here. What HarfBuzz
> can tell you is this: for each position in the text, it can tell you whether
> breaking the string here and shaping the two sides separately and
> concatenating the resulting glyphstrings will result in the same glyphstring
> that you get if you shape the full string. No other code can tell you that,
> since it depends on how the font lookups work.
>  
> behdad
>  
> > Konstantin  

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