From 3fcc03fb2d4b629fb7f0a72a6aa45916086c6d06 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Erik=20Nilsen?= <bjorn.nilsen@nokia.com>
Date: Mon, 3 Aug 2009 10:12:09 +0200
Subject: Avoid painting on a null pixmap in QGraphicsShadowEffect.

---
 src/gui/graphicsview/qgraphicseffect.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/gui/graphicsview/qgraphicseffect.cpp b/src/gui/graphicsview/qgraphicseffect.cpp
index 37e3d8c..17506bc 100644
--- a/src/gui/graphicsview/qgraphicseffect.cpp
+++ b/src/gui/graphicsview/qgraphicseffect.cpp
@@ -726,6 +726,8 @@ void QGraphicsShadowEffect::draw(QPainter *painter, QGraphicsEffectSource *sourc
         // Clip to device rect to avoid huge pixmaps.
         effectRect &= source->deviceRect();
         effectRect |= effectRect.translated(-shadowOffset);
+        if (effectRect.isEmpty())
+            return; // nothing to paint;
     }
 
     QPixmap pixmap(effectRect.size());
-- 
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