emacs-28 e3171e7: Allow automatic use of color fonts for emoji on macOS

[Robert Pluim]

branch: emacs-28
commit e3171e7e860f77156873f13161a8833a210bae37
Author: Robert Pluim <rpluim@gmail.com>
Commit: Robert Pluim <rpluim@gmail.com>

    Allow automatic use of color fonts for emoji on macOS
    
    * src/macfont.m (macfont_list): Don't exclude color fonts when the
    fontspec has an 'emoji' script specification.
---
 src/macfont.m | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/macfont.m b/src/macfont.m
index d86f09f..78ed5d5 100644
--- a/src/macfont.m
+++ b/src/macfont.m
@@ -2415,8 +2415,12 @@ macfont_list (struct frame *f, Lisp_Object spec)
             continue;
 
           /* Don't use a color bitmap font unless its family is
-             explicitly specified.  */
-          if ((sym_traits & kCTFontTraitColorGlyphs) && NILP (family))
+             explicitly specified or we're looking for a font for
+             emoji.  */
+          if ((sym_traits & kCTFontTraitColorGlyphs)
+              && NILP (family)
+              && !EQ (CDR_SAFE (assq_no_quit (QCscript, AREF (spec, 
FONT_EXTRA_INDEX))),
+                      Qemoji))
             continue;
 
           if (j > 0