bug#73730: 31.0.50; Support for color fonts on MS-Windows

[Eli Zaretskii]

> Date: Fri, 25 Oct 2024 12:17:37 +0200
> Cc: 73730@debbugs.gnu.org
> From: Cecilio Pardo <cpardo@imayhem.com>
> 
> On 25/10/2024 9:26, Eli Zaretskii wrote:
> 
> > Thanks, I will review this shortly.  Meanwhile, could you please look
> > at how Emacs with this patch displays some complex Emoji sequences?
> > Some of them look incorrect to me.  For example, this sequence from
> > admin/unidata/emoji-zwj-sequences.txt:
> > 
> >    1F469 200D 1F469 200D 1F467 200D 1F466      ; RGI_Emoji_ZWJ_Sequence  ; 
> > family: woman, woman, girl, boy                                # E2.0   [1] 
> > (👩‍👩‍👧‍👦)
> > 
> > when displayed using Segoe UI Emoji, is shown with the "boy" part
> > overlapping the closing parenthesis, which looks incorrect to me.
> > "C-u C-x =" claims all of the codepoints of the sequence were composed
> > into a single grapheme cluster, but it doesn't look like that on
> > display, and the cursor doesn't include the "boy" part.
> 
> I dont's see that, but I do see that the individual glyphs are truncated 
> on the left side, even when removing color rendering.  Do you see
> it?

Yes.

> I will investigate this first, in case the defects are related.

Thanks.