Merge branch '4.6' of scm.dev.nokia.troll.no:qt/oslo-staging-2 into 4.6-integration

* '4.6' of scm.dev.nokia.troll.no:qt/oslo-staging-2:
  fix QTabBar scroll button arrow position in Windows mobile style
  Revert "Optimize getting bearings of a glyph on Windows for true type fonts"
  stabilize tst_QAccessibility::comboBoxTest
  Better handling for NOTIFY in QGraphicsWidget regarding geometry changes
  Add NOTIFY to size property so QML bindings are working fine.
  Implement Q_PRIVATE_PROPERTY that allows you to declare properties
  fix PM_TabBarScrollButtonWidth pixel metric in Windows mobile style
  Stabilize taskQTBUG_7863_paintIntoCacheWithTransparentParts auto-test.
  Optimize getting bearings of a glyph on Windows for true type fonts
  Fixes blending problem when paiting non-opaque items with cache enabled.
  Optimize speed of QTextLayout and QPainter::drawText
  Fix a crash in animation groups when deleting uncontrolled animations

1 files changed, 6 insertions, 0 deletions

diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp
index 4ee2301..6934abc 100644
--- a/src/gui/graphicsview/qgraphicsscene.cpp
+++ b/src/gui/graphicsview/qgraphicsscene.cpp
@@ -4285,6 +4285,12 @@ static void _q_paintIntoCache(QPixmap *pix, QGraphicsItem *item, const QRegion &
     if (!subPix.isNull()) {
         // Blit the subpixmap into the main pixmap.
         pixmapPainter.begin(pix);
+        if (item->cacheMode() == QGraphicsItem::DeviceCoordinateCache
+            && itemToPixmap.type() > QTransform::TxTranslate) {
+            pixmapPainter.setCompositionMode(QPainter::CompositionMode_SourceAtop);
+        } else {
+            pixmapPainter.setCompositionMode(QPainter::CompositionMode_Source);
+        }
         pixmapPainter.setClipRegion(pixmapExposed);
         pixmapPainter.drawPixmap(br.topLeft(), subPix);
         pixmapPainter.end();