[HarfBuzz] Arabic: lookup order vs. feature order

Behdad Esfahbod behdad at behdad.org
Tue Jul 11 09:15:07 UTC 2017

Hi Eric,

We try to follow Uniscribe very closely.  See:


I'll follow up with your issue on github.


On Tue, Jul 11, 2017 at 4:11 AM, Eric Muller <emuller at amazon.com> wrote:

> If I read the Microsoft spec for Arabic, it seems pretty clear that
> features should be applied one by one, in a specified order. On the other
> hand, I have the impression that Harfbuzz applies the lookups in lookup
> order. Is that the case?
> Evidence at <https://github.com/behdad/harfbuzz/issues/505>.
> Thanks,
> Eric.
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