3 files changed, 23 insertions, 10 deletions
diff --git a/src/plugins/gfxdrivers/directfb/qdirectfbpaintengine.cpp b/src/plugins/gfxdrivers/directfb/qdirectfbpaintengine.cpp
index c4dae2e40c..101c4b7fa6 100644
--- a/src/plugins/gfxdrivers/directfb/qdirectfbpaintengine.cpp
+++ b/src/plugins/gfxdrivers/directfb/qdirectfbpaintengine.cpp
@@ -337,6 +337,7 @@ private:
 
     bool dirtyClip;
     bool dfbHandledClip;
+    bool ignoreSystemClip;
     QDirectFBPaintDevice *dfbDevice;
 
     QDirectFBPaintEngine *q;
@@ -350,6 +351,7 @@ QDirectFBPaintEnginePrivate::QDirectFBPaintEnginePrivate(QDirectFBPaintEngine *p
       dfbHandledClip(false), dfbDevice(0), q(p)
 {
     fb = QDirectFBScreen::instance()->dfb();
+    ignoreSystemClip = QDirectFBScreen::instance()->ignoreSystemClip();
     surfaceCache = new SurfaceCache;
     static int cacheLimit = qgetenv("QT_DIRECTFB_IMAGECACHE").toInt();
     if (cacheLimit > 0)
@@ -774,23 +776,24 @@ void QDirectFBPaintEnginePrivate::updateClip()
     if (!dirtyClip)
         return;
 
-    if (!clip() || !clip()->enabled) {
+    const QClipData *clipData = clip();
+    if (!clipData || !clipData->enabled) {
         surface->SetClip(surface, NULL);
         dfbHandledClip = true;
-    }
-    else if (clip()->hasRectClip) {
+    } else if (clipData->hasRectClip) {
         const DFBRegion r = {
-            clip()->clipRect.x(),
-            clip()->clipRect.y(),
-            clip()->clipRect.x() + clip()->clipRect.width(),
-            clip()->clipRect.y() + clip()->clipRect.height()
+            clipData->clipRect.x(),
+            clipData->clipRect.y(),
+            clipData->clipRect.x() + clipData->clipRect.width(),
+            clipData->clipRect.y() + clipData->clipRect.height()
         };
         surface->SetClip(surface, &r);
-
         dfbHandledClip = true;
-    }
-    else
+    } else if (clipData->hasRegionClip && ignoreSystemClip && clipData->clipRegion == systemClip) {
+        dfbHandledClip = true;
+    } else {
         dfbHandledClip = false;
+    }
 
     dirtyClip = false;
 }
diff --git a/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp b/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp
index 3e54e7f57d..177df1d809 100644
--- a/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp
+++ b/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp
@@ -81,6 +81,7 @@ public:
     QDirectFBKeyboardHandler *keyboard;
 #endif
     bool videoonly;
+    bool ignoreSystemClip;
     QImage::Format alphaPixmapFormat;
 };
 
@@ -97,6 +98,7 @@ QDirectFBScreenPrivate::QDirectFBScreenPrivate(QDirectFBScreen* screen)
     , keyboard(0)
 #endif
     , videoonly(false)
+    , ignoreSystemClip(false)
     , alphaPixmapFormat(QImage::Format_Invalid)
 {
 #ifndef QT_NO_QWS_SIGNALHANDLER
@@ -826,6 +828,9 @@ bool QDirectFBScreen::connect(const QString &displaySpec)
     if (displayArgs.contains(QLatin1String("videoonly")))
         d_ptr->videoonly = true;
 
+    if (displayArgs.contains(QLatin1String("ignoresystemclip"), Qt::CaseInsensitive))
+        d_ptr->ignoreSystemClip = true;
+
 #ifndef QT_NO_DIRECTFB_WM
     if (displayArgs.contains(QLatin1String("fullscreen")))
 #endif
@@ -1256,3 +1261,7 @@ uchar *QDirectFBScreen::lockSurface(IDirectFBSurface *surface, DFBSurfaceLockFla
     return reinterpret_cast<uchar*>(mem);
 }
 
+bool QDirectFBScreen::ignoreSystemClip() const
+{
+    return d_ptr->ignoreSystemClip;
+}
diff --git a/src/plugins/gfxdrivers/directfb/qdirectfbscreen.h b/src/plugins/gfxdrivers/directfb/qdirectfbscreen.h
index 8dd38dc6a4..08c9ac184c 100644
--- a/src/plugins/gfxdrivers/directfb/qdirectfbscreen.h
+++ b/src/plugins/gfxdrivers/directfb/qdirectfbscreen.h
@@ -109,6 +109,7 @@ public:
     void releaseDFBSurface(IDirectFBSurface* surface);
 
     bool preferVideoOnly() const;
+    bool ignoreSystemClip() const;
 
     static int depth(DFBSurfacePixelFormat format);