[ros-diffs] [cwittich] 30687: don't try to alphablend monochrome bitmaps - fixes the red zone overwrite in opera 9.24

[cwittich at svn.reactos.org]

Author: cwittich
Date: Fri Nov 23 10:33:54 2007
New Revision: 30687

URL: http://svn.reactos.org/svn/reactos?rev=30687&view=rev
Log:
don't try to alphablend monochrome bitmaps - fixes the red zone overwrite in opera 9.24

Modified:
    trunk/reactos/subsystems/win32/win32k/ntuser/cursoricon.c

Modified: trunk/reactos/subsystems/win32/win32k/ntuser/cursoricon.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/ntuser/cursoricon.c?rev=30687&r1=30686&r2=30687&view=diff
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/ntuser/cursoricon.c (original)
+++ trunk/reactos/subsystems/win32/win32k/ntuser/cursoricon.c Fri Nov 23 10:33:54 2007
@@ -1400,7 +1400,10 @@
       IconSize.cy = bmpMask.bmHeight / 2;
    }
 
-   if (bmpColor.bmBitsPixel == 32)
+   /* NtGdiCreateCompatibleBitmap will create a monochrome bitmap
+      when cxWidth or cyHeight is 0
+   */
+   if ((bmpColor.bmBitsPixel == 32) && (cxWidth != 0) && (cyHeight != 0))
    {
       bAlpha = TRUE;
    }