Re: HarfBuzz on MacOS

[YAMAMOTO Mitsuharu]

On Wed, 20 Nov 2019 01:30:49 +0900,
Robert Pluim wrote:
> 
> >>>>> On Tue, 19 Nov 2019 18:18:00 +0200, Eli Zaretskii <address@hidden> said:
> 
>     >> From: Robert Pluim <address@hidden>
>     >> Date: Tue, 19 Nov 2019 14:39:48 +0100
>     >> Cc: emacs-devel <address@hidden>
>     >> 
>     Pankaj> Another question: will this make any difference on MacOS when it 
> is
>     Pankaj> supported?
>     >> 
>     >> I donʼt know. Coretext works well enough for me, but perhaps it has
>     >> deficiencies that aren't obvious to me. Certainly it would be nice to
>     >> only have to worry about one shaping library.
> 
>     Eli> Yes, we should strive to support HarfBuzz on all GUI platforms.
>     Eli> Volunteers are welcome to work on that support on macOS.
> 
> I have a vague memory of Yamamoto-san having a preliminary patch for
> macOS, but I canʼt locate it right now.

It's not public.  I used it just to test if the interface design
(begin_hb_font and end_hb_font in struct font_driver) is appropriate.

I'm currently reluctant to have multiple font backends on macOS
because of Bug#36835, especially if HarfBuzz doesn't have practical
advantages over the Core Text shaper.

                                     YAMAMOTO Mitsuharu
                                address@hidden