bug#67794: 30.0.50; mouse-face is not respected on SVG images

[Manuel Giraud]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Manuel Giraud <manuel@ledu-giraud.fr>
>> Cc: gerd.moellmann@gmail.com,  alan@idiocy.org,  67794@debbugs.gnu.org
>> Date: Thu, 14 Dec 2023 10:07:41 +0100
>> 
>> Would it be possible to lookup_image with the current mouse face at
>> glyphs generation time for a string with the mouse-face property and
>> then, using this image glyph when showing the mouse face?
>
> I guess it's possible, but it requires changes in how the display code
> works:
>
>   . when we generate glyphs, we currently pay no attention to
>     mouse-face properties, only to face properties
>   . image glyphs will need to store 2 image IDs, not 1, and use the
>     appropriate one in each case

Ok and do you think this is a good enough design?  Or should we do it
differently?
-- 
Manuel Giraud