[khornicek] 73881: [NTGDI] - Check for zero rectangles in REGION_bXformRgn. CORE-12204

Author: khornicek
Date: Wed Feb 22 10:48:41 2017
New Revision: 73881

URL: http://svn.reactos.org/svn/reactos?rev=73881&view=rev
Log:
[NTGDI]
- Check for zero rectangles in REGION_bXformRgn.
CORE-12204

Modified:
    trunk/reactos/win32ss/gdi/ntgdi/region.c

Modified: trunk/reactos/win32ss/gdi/ntgdi/region.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/ntgdi/region.c…
==============================================================================
--- trunk/reactos/win32ss/gdi/ntgdi/region.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/ntgdi/region.c	[iso-8859-1] Wed Feb 22 10:48:41 2017
@@ -2051,6 +2051,10 @@
     RECT rect;
     BOOL bResult;
 
+    /* Check for zero rectangles and return TRUE for translation only matrices */
+    if (prgn->rdh.nCount < 1)
+        return pmx->flAccel & XFORM_UNITY;
+
     /* Check if this is a scaling only matrix (off-diagonal elements are 0 */
     if (pmx->flAccel & XFORM_SCALE)
     {