Restrict painting of the svg to the decoration. No need to paint behind the window as it isn't visible anyway.

That seems to fix the most painfull performance issues with Aurorae.

svn path=/trunk/KDE/kdebase/workspace/; revision=1011338

clients/aurorae/src/aurorae.cpp

@@ -685,6 +685,27 @@ void AuroraeClient::paintEvent(QPaintEvent *event)
         }
     }
 
+    // restrict painting on the decoration - no need to paint behind the window
+    int left, right, top, bottom;
+    decoration()->borders(left, right, top, bottom);
+    painter.setClipping(true);
+    painter.setClipRect(0, 0,
+                        left + conf.paddingLeft(),
+                        height() + conf.paddingTop() + conf.paddingBottom(),
+                        Qt::ReplaceClip);
+    painter.setClipRect(0, 0,
+                        width() + conf.paddingLeft() + conf.paddingRight(),
+                        top + conf.paddingTop(),
+                        Qt::UniteClip);
+    painter.setClipRect(width() - right + conf.paddingLeft(), 0,
+                        right + conf.paddingRight(),
+                        height() + conf.paddingTop() + conf.paddingBottom(),
+                        Qt::UniteClip);
+    painter.setClipRect(0, height() - bottom + conf.paddingTop(),
+                        width() + conf.paddingLeft() + conf.paddingRight(),
+                        bottom + conf.paddingBottom(),
+                        Qt::UniteClip);
+
     // top
     if (maximized) {
         frame->setEnabledBorders(Plasma::FrameSvg::NoBorder);