1 files changed, 3 insertions, 4 deletions
diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp
index 6571a76..ef115bd 100644
--- a/src/opengl/qwindowsurface_gl.cpp
+++ b/src/opengl/qwindowsurface_gl.cpp
@@ -499,10 +499,9 @@ 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();