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

[Lóránt Pintér]

That would be great. It would mean less work for me to implement of course, but more importantly, with the JS port performance is key, and not having to re-shape everything twice would be really important for us.  

If there's a way I can help make this happen, let me know.

--  
Lóci


On Wednesday, October 24, 2012 at 10:53 PM, Behdad Esfahbod wrote:

> On 12-10-24 09:33 AM, Lóránt Pintér wrote:
> > Having this would be wonderful. Is there a plan to do this in the near future,
> > maybe before 1.0?
> >  
>  
>  
> It's probably two hours to get this working... I'll try to prioritize it.
>  
> behdad
>  
>  
> > --  
> > 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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