Changed QPixmap VG backend to use CFbsBitmap on Symbian.

Similarly to QS60PixmapData, that is used on raster, QVGPixmapData
is also backed by a CFbsBitmap from now on (at least when it makes
sense to do so). This allows copy-less bitmap handle duplication in
from- and toSymbianCFbsBitmap() in case of certain image formats,
reduces local heap usage and improves performance with the s60 style
due to a reduced number of pixel data copies.

Task-number: QT-2505

Reviewed-by: Jason Barron
Reviewed-by: Jani Hautakangas

1 files changed, 97 insertions, 0 deletions

diff --git a/src/gui/image/qvolatileimagedata_p.h b/src/gui/image/qvolatileimagedata_p.h
new file mode 100644
index 0000000..dab1685
--- /dev/null
+++ b/src/gui/image/qvolatileimagedata_p.h
@@ -0,0 +1,97 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QVOLATILEIMAGEDATA_P_H
+#define QVOLATILEIMAGEDATA_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtGui/qimage.h>
+#include <QtCore/qshareddata.h>
+
+#ifdef Q_OS_SYMBIAN
+class CFbsBitmap;
+#endif
+
+QT_BEGIN_NAMESPACE
+
+class QVolatileImageData : public QSharedData
+{
+public:
+    QVolatileImageData();
+    QVolatileImageData(int w, int h, QImage::Format format);
+    QVolatileImageData(const QImage &sourceImage);
+    QVolatileImageData(void *nativeImage, void *nativeMask);
+    QVolatileImageData(const QVolatileImageData &other);
+    ~QVolatileImageData();
+
+    void beginDataAccess() const;
+    void endDataAccess(bool readOnly = false) const;
+    bool ensureFormat(QImage::Format format);
+    void *duplicateNativeImage() const;
+    void ensureImage();
+
+#ifdef Q_OS_SYMBIAN
+    void updateImage();
+    void initWithBitmap(CFbsBitmap *source);
+    void applyMask(CFbsBitmap *mask);
+    void ensureBitmap();
+    void release();
+    QVolatileImageData *next;
+    QVolatileImageData *prev;
+    CFbsBitmap *bitmap;
+#endif
+    QImage image;
+    QPaintEngine *pengine;
+};
+
+QT_END_NAMESPACE
+
+#endif // QVOLATILEIMAGEDATA_P_H