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

1 files changed, 87 insertions, 0 deletions

diff --git a/src/gui/painting/qgraphicssystemex_symbian.cpp b/src/gui/painting/qgraphicssystemex_symbian.cpp
new file mode 100644
index 0000000000..54d21aca13
--- /dev/null
+++ b/src/gui/painting/qgraphicssystemex_symbian.cpp
@@ -0,0 +1,87 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qgraphicssystemex_symbian_p.h"
+#include "private/qwidget_p.h"
+#include "private/qbackingstore_p.h"
+#include "private/qapplication_p.h"
+#include "qwidget_p.h"
+
+#include <QDebug>
+
+QT_BEGIN_NAMESPACE
+
+void QSymbianGraphicsSystemEx::releaseCachedGpuResources()
+{
+    // Do nothing here
+    // This is implemented in graphics system specific plugin
+}
+
+void QSymbianGraphicsSystemEx::releaseAllGpuResources()
+{
+    releaseCachedGpuResources();
+
+    foreach (QWidget *widget, QApplication::topLevelWidgets()) {
+        if (QTLWExtra *topExtra = qt_widget_private(widget)->maybeTopData())
+            topExtra->backingStore.destroy();
+    }
+}
+
+bool QSymbianGraphicsSystemEx::hasBCM2727()
+{
+    return !QApplicationPrivate::instance()->useTranslucentEGLSurfaces;
+}
+
+void QSymbianGraphicsSystemEx::forceToRaster(QWidget *window)
+{
+    if (window && window->isWindow()) {
+        qt_widget_private(window)->createTLExtra();
+        if (QTLWExtra *topExtra = qt_widget_private(window)->maybeTopData()) {
+            topExtra->forcedToRaster = 1;
+            if (topExtra->backingStore.data()) {
+                topExtra->backingStore.create(window);
+                topExtra->backingStore.registerWidget(window);
+            }
+        }
+    }
+}
+
+QT_END_NAMESPACE