1 files changed, 8 insertions, 0 deletions
diff --git a/src/gui/effects/qgraphicseffect.cpp b/src/gui/effects/qgraphicseffect.cpp
index 3a6bab5..f24d424 100644
--- a/src/gui/effects/qgraphicseffect.cpp
+++ b/src/gui/effects/qgraphicseffect.cpp
@@ -97,6 +97,8 @@
 */
 
 #include "qgraphicseffect_p.h"
+#include "private/qgraphicsitem_p.h"
+
 #include <QtGui/qgraphicsitem.h>
 
 #include <QtGui/qimage.h>
@@ -260,6 +262,12 @@ QPixmap QGraphicsEffectSource::pixmap(Qt::CoordinateSystem system, QPoint *offse
         return ((QGraphicsPixmapItem *) item)->pixmap();
     }
 
+    if (system == Qt::DeviceCoordinates && item
+        && !static_cast<const QGraphicsItemEffectSourcePrivate *>(d_func())->info) {
+        qWarning("QGraphicsEffectSource::pixmap: Not yet implemented, lacking device context");
+        return QPixmap();
+    }
+
     QPixmap pm;
     if (d->m_cachedSystem == system && d->m_cachedMode == mode)
         QPixmapCache::find(d->m_cacheKey, &pm);