[tkreuzer] 64359: [WIN32K] Fix NtGdiExcludeClipRect. Should fix regressions from r64260.

Author: tkreuzer
Date: Sat Sep 27 22:59:13 2014
New Revision: 64359

URL: http://svn.reactos.org/svn/reactos?rev=64359&view=rev
Log:
[WIN32K]
Fix NtGdiExcludeClipRect. Should fix regressions from r64260.

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

Modified: trunk/reactos/win32ss/gdi/ntgdi/cliprgn.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/ntgdi/cliprgn.…
==============================================================================
--- trunk/reactos/win32ss/gdi/ntgdi/cliprgn.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/ntgdi/cliprgn.c	[iso-8859-1] Sat Sep 27 22:59:13 2014
@@ -226,34 +226,27 @@
         iComplexity = REGION_SubtractRectFromRgn(pdc->dclevel.prgnClip,
                                                  pdc->dclevel.prgnClip,
                                                  &rect);
-
-        /* Emulate Windows behavior */
-        if (iComplexity == SIMPLEREGION)
-            iComplexity = COMPLEXREGION;
-    }
-    else
-    {
-        /* Check if the rect intersects with the window rect */
-        if (RECTL_bIntersectRect(&rect, &rect, &pdc->erclWindow))
-        {
-            /* It does. In this case create an empty region */
-            pdc->dclevel.prgnClip = IntSysCreateRectpRgn(0, 0, 0, 0);
-            iComplexity = NULLREGION;
+    }
+    else
+    {
+        /* We don't have a clip region yet, create an empty region */
+        pdc->dclevel.prgnClip = IntSysCreateRectpRgn(0, 0, 0, 0);
+        if (pdc->dclevel.prgnClip == NULL)
+        {
+            iComplexity = ERROR;
         }
         else
         {
-            /* Otherwise, emulate strange Windows behavior... */
-            pdc->dclevel.prgnClip = IntSysCreateRectpRgn(0, 0, 1, 1);
-            iComplexity = COMPLEXREGION;
-        }
-
-        /* Check if creating the region failed */
-        if (pdc->dclevel.prgnClip == NULL)
-        {
-            /* Return error code */
-            iComplexity = ERROR;
-        }
-    }
+            /* Subtract the rect from the VIS region */
+            iComplexity = REGION_SubtractRectFromRgn(pdc->dclevel.prgnClip,
+                                                     pdc->prgnVis,
+                                                     &rect);
+        }
+    }
+
+    /* Emulate Windows behavior */
+    if (iComplexity == SIMPLEREGION)
+        iComplexity = COMPLEXREGION;
 
     /* If we succeeded, mark the RAO region as dirty */
     if (iComplexity != ERROR)