[pango/speed-up-format-filtering: 1/2] Speed up font format filtering

[Matthias Clasen <matthiasc src gnome org>]

commit e9703ea37a471fb1f61f57e644c78a6a411ad5d6
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Aug 15 15:28:40 2020 -0400

    Speed up font format filtering
    
    We were needlessly duplicating patters when we
    could have just referenced them.

 pango/pangofc-fontmap.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/pango/pangofc-fontmap.c b/pango/pangofc-fontmap.c
index ec5040947..6d7ae3aaf 100644
--- a/pango/pangofc-fontmap.c
+++ b/pango/pangofc-fontmap.c
@@ -848,7 +848,10 @@ filter_fontset_by_format (FcFontSet *fontset)
   for (i = 0; i < fontset->nfont; i++)
     {
       if (pango_fc_is_supported_font_format (fontset->fonts[i]))
-        FcFontSetAdd (result, FcPatternDuplicate (fontset->fonts[i]));
+        {
+          FcPatternReference (fontset->fonts[i]);
+          FcFontSetAdd (result, fontset->fonts[i]);
+        }
     }
 
   return result;