Nikolay Sivov : dwrite: Validate buffer size passed to CreateAlphaTexture( ) against analysis texture type.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 0a633908410f8ecd815ab8c897768a0dfad1028e
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=0a633908410f8ecd815ab8c897...

Author: Nikolay Sivov <nsivov(a)codeweavers.com>
Date:   Tue Sep  5 13:35:28 2017 +0300

dwrite: Validate buffer size passed to CreateAlphaTexture() against analysis texture type.

Signed-off-by: Nikolay Sivov <nsivov(a)codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>

---

 dlls/dwrite/font.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/dwrite/font.c b/dlls/dwrite/font.c
index 4dfb47f..9af46be 100644
--- a/dlls/dwrite/font.c
+++ b/dlls/dwrite/font.c
@@ -5092,7 +5092,7 @@ static HRESULT WINAPI glyphrunanalysis_CreateAlphaTexture(IDWriteGlyphRunAnalysi
 
     /* make sure buffer is large enough for requested texture type */
     required = (bounds->right - bounds->left) * (bounds->bottom - bounds->top);
-    if (type == DWRITE_TEXTURE_CLEARTYPE_3x1)
+    if (This->texture_type == DWRITE_TEXTURE_CLEARTYPE_3x1)
         required *= 3;
 
     if (size < required)