From d6203cfeb0e096575c1fc0254dddc07a3d65d24c Mon Sep 17 00:00:00 2001
From: Michael Dominic K <mdk@codethink.co.uk>
Date: Wed, 21 Jul 2010 11:17:33 +0200
Subject: Do check after all if we have partialUpdateSupport.

Task-number: QTBUG-12266
Merge-request: 752
Reviewed-by: Trond
---
 src/opengl/qwindowsurface_gl.cpp | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp
index e9da452..6b82ed3 100644
--- a/src/opengl/qwindowsurface_gl.cpp
+++ b/src/opengl/qwindowsurface_gl.cpp
@@ -494,10 +494,9 @@ void QGLWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint &
                 }
             }
 #endif
-            if (d_ptr->paintedRegion.boundingRect() != geometry()) {
-                // Emits warning if not supported. Should never happen unless
-                // setPartialUpdateSupport(true) has been called.
-                context()->d_func()->swapRegion(&d_ptr->paintedRegion);
+            if (d_ptr->paintedRegion.boundingRect() != geometry() && 
+                hasPartialUpdateSupport()) {
+                context()->d_func()->swapRegion(&d_ptr->paintedRegion);             
             } else
                 context()->swapBuffers();
 
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