[HarfBuzz] Kerning issue with Linux Libertine smallcaps

[Khaled Hosny]

Interesting. One obvious difference is that 5.1.3 has one lookup in the
kern feature, but 5.3.0 splits it into four.

Now if I reorder the lookups so that the one involving smallcaps comes
first, “Va” and “T-” get kerned, but “VA” gets unkerned. If I move the
small caps lookup to a separate feature, all kerning is applied
(regardless of the order).

Not sure if this is a font bug or HarfBuzz bug (just if the Uniscribe
backednd supported user features…).

Regards,
Khaled

On Sun, Aug 04, 2013 at 10:36:13AM +0100, Jonathan Kew wrote:
> Hi Khaled,
> 
> Interestingly, it kerns as expected when using a somewhat older
> LinLibertine release (5.1.3) that I happen to have on hand. But with
> 5.3.0, I see the problem as reported.
> 
> I haven't yet inspected the fonts to see what changed in the kern
> feature between these versions, but understanding that change might
> help pinpoint what's going wrong.
> 
> JK
> 
> 
> On 4/8/13 08:25, Khaled Hosny wrote:
> >Hi Behdad,
> >
> >People are reporting kerning issues with Linux Libertine smallcaps,
> >for example, there is no kerning between smallcap “Va” and “T-” in the
> >example below, though “ata” and “VA” are kerned (the font’s class
> >kerning lookups seems to cover all of them):
> >
> >hb-view LinLibertine_R.otf "VataT-VA" --features="+smcp"
> >
> >Regards,
> >Khaled
> >
> >
> >
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> 
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