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/* This file is part of the KDE project.
Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2.1 or 3 of the License.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef PHONON_MMF_VIDEOOUTPUT_DSA_H
#define PHONON_MMF_VIDEOOUTPUT_DSA_H
#include <QRect>
#include "phonon/mmf/abstractvideooutput.h"
QT_BEGIN_NAMESPACE
class QResizeEvent;
class QMoveEvent;
namespace Phonon
{
namespace MMF
{
class AncestorMoveMonitor;
/**
* @short Widget on which video is displayed by DSA rendering
*
* This implementation is used on devices with the legacy graphics
* subsystem, which does not support surfaces. On such devices,
* video rendering is done via Direct Screen Access (DSA), whereby
* the video decoder writes directly to the framebuffer. To ensure
* that the window server and video decoder do not try to draw to
* the same screen region at the same time, the video subsystem
* first requests permission to perform DSA. If the window server
* needs to draw to this screen region (for example to display a
* message dialog), it first notifies the video subsystem that it
* must stop rendering to this region.
*
* @see SurfaceVideoOutput
*/
class DsaVideoOutput
: public AbstractVideoOutput
{
Q_OBJECT
public:
DsaVideoOutput(QWidget *parent);
~DsaVideoOutput();
void setAncestorMoveMonitor(AncestorMoveMonitor *monitor);
// Get absolute screen rectangle for video window
const QRect& videoWindowScreenRect() const;
// Called by AncestorMoveMonitor
void ancestorMoved();
public Q_SLOTS:
// Callbacks received from Symbian QtGui implementation, when it
// begins / ends blitting the video widget's backing store to the
// window server.
void beginNativePaintEvent(const QRect & /*controlRect*/);
void endNativePaintEvent(const QRect & /*controlRect*/);
Q_SIGNALS:
void videoWindowScreenRectChanged();
// Emitted when the Symbian QtGui implementation begins / ends
// blitting the video widget's backing store to the window server.
void beginVideoWindowNativePaint();
void endVideoWindowNativePaint();
private:
void getVideoWindowScreenRect();
void registerForAncestorMoved();
// QWidget
void resizeEvent(QResizeEvent *event);
void moveEvent(QMoveEvent *event);
bool event(QEvent *event);
private:
// Not owned
AncestorMoveMonitor* m_ancestorMoveMonitor;
// Absolute screen rectangle on which video is displayed
QRect m_videoWindowScreenRect;
};
}
}
QT_END_NAMESPACE
#endif // !PHONON_MMF_VIDEOOUTPUT_DSA_H
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