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bug#33729: 27.0.50; Partial glyphs not rendered for Gujarati with Harfbu

From: Behdad Esfahbod
Subject: bug#33729: 27.0.50; Partial glyphs not rendered for Gujarati with Harfbuzz enabled (renders fine using m17n)
Date: Sat, 22 Dec 2018 10:27:06 -0500

I suggest you enabled UCDN.

On Sat, Dec 22, 2018 at 10:15 AM Khaled Hosny <address@hidden> wrote:
On Sat, Dec 22, 2018 at 12:11:15PM +0200, Eli Zaretskii wrote:
> > Date: Sat, 22 Dec 2018 11:06:44 +0200
> > From: Khaled Hosny <address@hidden>
> > Cc: Glenn Morris <address@hidden>, address@hidden, address@hidden,
> >     address@hidden, address@hidden
> >
> > > Alternatively, we could just use HarfBuzz’s own built in ucdn-based
> > > Unicode function for this. The only reason for overriding this in Emacs
> > > was to keep HarfBuzz and Emacs Unicode support in sync, but if we are
> > > going to duplicate the Unicode script data then better use what HarfBuzz
> > > has.
> > >
> > > I’m going to try this now.
> >
> > I pushed a commit to harfbuzz branch that I think fixes this issue now.
> Thanks.
> There's a FIXME in the change you pushed (which I believe just
> repeats what was already in the previous version).  Ca you tell more
> about the problem we need to fix there?

We need a way to get Unicode composition and decomposition for the
a given character (implementing the uni_compose and uni_decompose
functions I deleted). I recall you suggested something earlier that I
tried but couldn’t get to work, the exact detail escapes me.


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