[pango] Don't RenderPrepare the FcFontMatch result

[Behdad Esfahbod <behdad src gnome org>]

commit f0cd936cf62c552bc6b17f6ecb70c2de783a9e80
Author: Behdad Esfahbod <behdad behdad org>
Date:   Sun Dec 30 18:50:42 2012 -0600

    Don't RenderPrepare the FcFontMatch result
    
    After commit 7c1d6208a4b42ef3a3cce0d8dffb214c7a321e5e, the first matched
    font was being prepared twice, causing misconfiguration.

 pango/pangofc-fontmap.c |   25 ++++++++++++++++++-------
 1 files changed, 18 insertions(+), 7 deletions(-)
---
diff --git a/pango/pangofc-fontmap.c b/pango/pangofc-fontmap.c
index 017fe44..0188be9 100644
--- a/pango/pangofc-fontmap.c
+++ b/pango/pangofc-fontmap.c
@@ -242,7 +242,9 @@ static PangoFcPatterns *pango_fc_patterns_new   (FcPattern       *pat,
 static PangoFcPatterns *pango_fc_patterns_ref   (PangoFcPatterns *pats);
 static void             pango_fc_patterns_unref (PangoFcPatterns *pats);
 static FcPattern       *pango_fc_patterns_get_pattern      (PangoFcPatterns *pats);
-static FcPattern       *pango_fc_patterns_get_font_pattern (PangoFcPatterns *pats, int i);
+static FcPattern       *pango_fc_patterns_get_font_pattern (PangoFcPatterns *pats,
+							    int              i,
+							    gboolean        *prepare);
 
 static PangoFcUPattern *uniquify_pattern (PangoFcFontMap *fcfontmap,
 					  FcPattern      *pattern);
@@ -850,7 +852,7 @@ pango_fc_patterns_get_pattern (PangoFcPatterns *pats)
 }
 
 static FcPattern *
-pango_fc_patterns_get_font_pattern (PangoFcPatterns *pats, int i)
+pango_fc_patterns_get_font_pattern (PangoFcPatterns *pats, int i, gboolean *prepare)
 {
   if (i == 0)
     {
@@ -861,7 +863,10 @@ pango_fc_patterns_get_font_pattern (PangoFcPatterns *pats, int i)
 	}
 
       if (pats->match)
-	return pats->match;
+        {
+	  *prepare = FALSE;
+	  return pats->match;
+        }
     }
   else
     {
@@ -877,6 +882,7 @@ pango_fc_patterns_get_font_pattern (PangoFcPatterns *pats, int i)
 	}
     }
 
+  *prepare = TRUE;
   if (pats->fontset && i < pats->fontset->nfont)
     return pats->fontset->fonts[i];
   else
@@ -939,17 +945,22 @@ pango_fc_fontset_load_next_font (PangoFcFontset *fontset)
 {
   FcPattern *pattern, *font_pattern;
   PangoFont *font;
+  gboolean prepare;
 
   pattern = pango_fc_patterns_get_pattern (fontset->patterns);
   font_pattern = pango_fc_patterns_get_font_pattern (fontset->patterns,
-						     fontset->patterns_i++);
+						     fontset->patterns_i++,
+						     &prepare);
   if (G_UNLIKELY (!font_pattern))
     return NULL;
 
-  font_pattern = FcFontRenderPrepare (NULL, pattern, font_pattern);
+  if (prepare)
+    {
+      font_pattern = FcFontRenderPrepare (NULL, pattern, font_pattern);
 
-  if (G_UNLIKELY (!font_pattern))
-    return NULL;
+      if (G_UNLIKELY (!font_pattern))
+	return NULL;
+    }
 
 #ifdef FC_PATTERN
     /* The FC_PATTERN element, which points back to our the original