From 02db01f3a6ec05069f78437b0c2d8d6c57763be8 Mon Sep 17 00:00:00 2001
From: jimtabor <james.tabor@reactos.org>
Date: Mon, 29 Jul 2019 13:02:07 -0500
Subject: [PATCH] [NtGDI] Fix one size region test.

See CORE-16246, the clip region may be the same size but more complex
than the callers simple region.
---
 win32ss/gdi/ntgdi/cliprgn.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/win32ss/gdi/ntgdi/cliprgn.c b/win32ss/gdi/ntgdi/cliprgn.c
index 566ce3fa4be..23f32426fe5 100644
--- a/win32ss/gdi/ntgdi/cliprgn.c
+++ b/win32ss/gdi/ntgdi/cliprgn.c
@@ -31,7 +31,7 @@ IntGdiReleaseVisRgn(PDC pDC)
 }
 
 //
-// Updating Vis Region Attribute the for DC Attributes.
+// Updating Vis Region Attribute for DC Attributes.
 // BTW: This system region has an user attribute for it.
 //
 VOID
@@ -239,8 +239,8 @@ IntGdiExtSelectClipRect(
         }
     }
     else // Have a box to build a region with.
-    {
-        if (dc->dclevel.prgnClip)
+    {                             //       See CORE-16246 : Needs to be a one box Clip Region.
+        if ( dc->dclevel.prgnClip && (REGION_Complexity(dc->dclevel.prgnClip) == SIMPLEREGION) )
         {
             REGION_GetRgnBox(dc->dclevel.prgnClip, &rect);