Akihiro Sagawa : gdiplus: Fix empty glyph handling.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: e29e4caca3bb914556cf66fd95165ca5ebce152a
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=e29e4caca3bb914556cf66fd95165ca5ebce152a

Author: Akihiro Sagawa <sagawa.aki at gmail.com>
Date:   Fri Sep 20 00:57:52 2013 +0900

gdiplus: Fix empty glyph handling.

---

 dlls/gdiplus/graphics.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/dlls/gdiplus/graphics.c b/dlls/gdiplus/graphics.c
index 79e4c7c..a642bd8 100644
--- a/dlls/gdiplus/graphics.c
+++ b/dlls/gdiplus/graphics.c
@@ -6242,11 +6242,15 @@ static GpStatus SOFTWARE_GdipDrawDriverString(GpGraphics *graphics, GDIPCONST UI
     /* Generate a mask for the text */
     for (i=0; i<length; i++)
     {
+        DWORD ret;
         int left, top, stride;
 
-        GetGlyphOutlineW(hdc, text[i], ggo_flags,
+        ret = GetGlyphOutlineW(hdc, text[i], ggo_flags,
             &glyphmetrics, max_glyphsize, glyph_mask, &identity);
 
+        if (ret == GDI_ERROR || ret == 0)
+            continue; /* empty glyph */
+
         left = pti[i].x + glyphmetrics.gmptGlyphOrigin.x;
         top = pti[i].y - glyphmetrics.gmptGlyphOrigin.y;
         stride = (glyphmetrics.gmBlackBoxX + 3) & (~3);