[pango] [xft,ft2] Fix empty-glyph logical extents

[Behdad Esfahbod <behdad src gnome org>]

commit 1e990af007255d1137ec76bd86658198d73994c6
Author: Behdad Esfahbod <behdad behdad org>
Date:   Mon Apr 6 19:43:17 2009 -0400

    [xft,ft2] Fix empty-glyph logical extents
    
    Previously we were returning zero.  We now return the height of the
    glyph for space.
---
 pango/pangoft2.c      |   17 ++++++++++++-----
 pango/pangoxft-font.c |   23 ++++++++++++++++++-----
 2 files changed, 30 insertions(+), 10 deletions(-)

diff --git a/pango/pangoft2.c b/pango/pangoft2.c
index 224f6a0..dd268b9 100644
--- a/pango/pangoft2.c
+++ b/pango/pangoft2.c
@@ -318,14 +318,12 @@ pango_ft2_font_get_glyph_extents (PangoFont      *font,
 				  PangoRectangle *logical_rect)
 {
   PangoFT2GlyphInfo *info;
+  gboolean empty = FALSE;
 
   if (glyph == PANGO_GLYPH_EMPTY)
     {
-      if (ink_rect)
-	ink_rect->x = ink_rect->y = ink_rect->height = ink_rect->width = 0;
-      if (logical_rect)
-	logical_rect->x = logical_rect->y = logical_rect->height = logical_rect->width = 0;
-      return;
+      glyph = pango_fc_font_get_glyph (font, ' ');
+      empty = TRUE;
     }
 
   if (glyph & PANGO_GLYPH_UNKNOWN_FLAG)
@@ -367,6 +365,15 @@ pango_ft2_font_get_glyph_extents (PangoFont      *font,
     *ink_rect = info->ink_rect;
   if (logical_rect)
     *logical_rect = info->logical_rect;
+
+  if (empty)
+    {
+      if (ink_rect)
+	ink_rect->x = ink_rect->y = ink_rect->height = ink_rect->width = 0;
+      if (logical_rect)
+	logical_rect->x = logical_rect->width = 0;
+      return;
+    }
 }
 
 /**
diff --git a/pango/pangoxft-font.c b/pango/pangoxft-font.c
index 6865490..4834f1f 100644
--- a/pango/pangoxft-font.c
+++ b/pango/pangoxft-font.c
@@ -326,19 +326,23 @@ pango_xft_font_get_glyph_extents (PangoFont        *font,
 {
   PangoXftFont *xfont = (PangoXftFont *)font;
   PangoFcFont *fcfont = PANGO_FC_FONT (font);
+  gboolean empty = FALSE;
 
-  if (!fcfont->fontmap)		/* Display closed */
-    goto fallback;
-
-  if (glyph == PANGO_GLYPH_EMPTY)
+  if (G_UNLIKELY (!fcfont->fontmap))	/* Display closed */
     {
-    fallback:
       if (ink_rect)
 	ink_rect->x = ink_rect->width = ink_rect->y = ink_rect->height = 0;
       if (logical_rect)
 	logical_rect->x = logical_rect->width = logical_rect->y = logical_rect->height = 0;
       return;
     }
+
+  if (glyph == PANGO_GLYPH_EMPTY)
+    {
+      glyph = pango_fc_font_get_glyph (font, ' ');
+      empty = TRUE;
+    }
+
   if (glyph & PANGO_GLYPH_UNKNOWN_FLAG)
     {
       get_glyph_extents_missing (xfont, glyph, ink_rect, logical_rect);
@@ -350,6 +354,15 @@ pango_xft_font_get_glyph_extents (PangoFont        *font,
       else
 	get_glyph_extents_raw (xfont, glyph, ink_rect, logical_rect);
     }
+
+  if (empty)
+    {
+      if (ink_rect)
+	ink_rect->x = ink_rect->y = ink_rect->height = ink_rect->width = 0;
+      if (logical_rect)
+	logical_rect->x = logical_rect->width = 0;
+      return;
+    }
 }
 
 static void