bug#57066: 29.0.50; Complex emoji overlaps with text

[Eli Zaretskii]

> Date: Thu, 11 Aug 2022 15:24:38 +0900
> From: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
> Cc: Eli Zaretskii <eliz@gnu.org>,
>       57066@debbugs.gnu.org
> 
> On Thu, 11 Aug 2022 15:01:31 +0900,
> YAMAMOTO Mitsuharu wrote:
> > 
> > It seems that position unit adjustment for bitmap fonts is no longer
> > necessary on HarfBuzz 5:
> > 
> >   https://github.com/harfbuzz/harfbuzz/issues/489
> > 
> > Could you test if the following patch works?
>  
> Oops, it breaks non-HarfBuzz builds.  Pleae try below instead.

Thanks!

Do other font backends that use HarfBuzz need something similar, or is
this specific to the ftcrhb backend?