From 1793343847b5254dc002b5bd9207793d126cbf8f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <mgraesslin@kde.org>
Date: Sun, 3 Jul 2011 19:52:14 +0200
Subject: [PATCH] Make Slideback work on OpenGL without PaintClipper

---
 effects/slideback/slideback.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/effects/slideback/slideback.cpp b/effects/slideback/slideback.cpp
index 2c87e5c146..562f2aa764 100644
--- a/effects/slideback/slideback.cpp
+++ b/effects/slideback/slideback.cpp
@@ -204,6 +204,9 @@ void SlideBackEffect::paintWindow(EffectWindow *w, int mask, QRegion region, Win
     if (motionManager.isManaging(w)) {
         motionManager.apply(w, data);
     }
+    foreach (const QRegion &r, clippedRegions) {
+        region = region.intersected(r);
+    }
     effects->paintWindow(w, mask, region, data);
     for (int i = clippedRegions.count() - 1; i > -1; --i)
         PaintClipper::pop(clippedRegions.at(i));