Introduce platform extension to QGraphicsSystem

Qt on Symbian needs some special capabilities to be able
to work on 32MB GPU. This patch introduces some Symbian
specific functions to QGraphicsSystem

Task-number: QTBUG-17882
Reviewed-by: Laszlo Agocs

2 files changed, 4 insertions, 1 deletions

diff --git a/src/gui/kernel/qwidget_p.h b/src/gui/kernel/qwidget_p.h
index c9dba29..7bf65f6 100644
--- a/src/gui/kernel/qwidget_p.h
+++ b/src/gui/kernel/qwidget_p.h
@@ -227,6 +227,7 @@ struct QTLWExtra {
 #elif defined(Q_OS_SYMBIAN)
     uint inExpose : 1; // Prevents drawing recursion
     uint nativeWindowTransparencyEnabled : 1; // Tracks native window transparency
+    uint forcedToRaster : 1;
 #endif
 };
 
diff --git a/src/gui/kernel/qwidget_s60.cpp b/src/gui/kernel/qwidget_s60.cpp
index a5d8f9f..1dd1477 100644
--- a/src/gui/kernel/qwidget_s60.cpp
+++ b/src/gui/kernel/qwidget_s60.cpp
@@ -825,7 +825,8 @@ void QWidgetPrivate::s60UpdateIsOpaque()
     RWindow *const window = static_cast<RWindow *>(q->effectiveWinId()->DrawableWindow());
 
 #ifdef Q_SYMBIAN_SEMITRANSPARENT_BG_SURFACE
-    if (QApplicationPrivate::instance()->useTranslucentEGLSurfaces) {
+    if (QApplicationPrivate::instance()->useTranslucentEGLSurfaces
+            && !extra->topextra->forcedToRaster) {
         window->SetSurfaceTransparency(!isOpaque);
         extra->topextra->nativeWindowTransparencyEnabled = !isOpaque;
         return;
@@ -1009,6 +1010,7 @@ void QWidgetPrivate::createTLSysExtra()
 {
     extra->topextra->inExpose = 0;
     extra->topextra->nativeWindowTransparencyEnabled = 0;
+    extra->topextra->forcedToRaster = 0;
 }
 
 void QWidgetPrivate::deleteTLSysExtra()