/*  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_GSTREAMER_GLRENDERER_H

#define Phonon_GSTREAMER_GLRENDERER_H

#include "videowidget.h"

#include "common.h"

#ifndef QT_NO_OPENGL

#include <QtOpenGL/QGLFormat>

#include <QtOpenGL/QGLWidget>

#ifndef QT_OPENGL_ES

QT_BEGIN_NAMESPACE

class QString;

namespace Phonon

{

namespace Gstreamer

{

class GLRenderWidgetImplementation;

class GLRenderer : public AbstractRenderer

{

public:

    GLRenderer(VideoWidget *control);

    ~GLRenderer();

    void handleMediaNodeEvent(const MediaNodeEvent *event);

    bool eventFilter(QEvent * event);

    bool paintsOnWidget() { return false; }

private:

    GLRenderWidgetImplementation *m_glWindow;

};

class GLRenderWidgetImplementation : public QGLWidget

{

    Q_OBJECT

    // ARB_fragment_program

    typedef void (*_glProgramStringARB) (GLenum, GLenum, GLsizei, const GLvoid *);

    typedef void (*_glBindProgramARB) (GLenum, GLuint);

    typedef void (*_glDeleteProgramsARB) (GLsizei, const GLuint *);

    typedef void (*_glGenProgramsARB) (GLsizei, GLuint *);

    typedef void (*_glActiveTexture) (GLenum);

public:

    GLRenderWidgetImplementation(VideoWidget *control, const QGLFormat &format);

    void paintEvent(QPaintEvent *event);

    GstElement *createVideoSink();

    void updateTexture(const QByteArray &array, int width, int height);

    bool hasYUVSupport() const;

    const QImage& currentFrame() const;

    QRect drawFrameRect() const { return m_drawFrameRect; }

    bool frameIsSet() const { return !m_array.isNull(); }

    void setNextFrame(const QByteArray &array, int width, int height);

    void clearFrame();

private:

    _glProgramStringARB glProgramStringARB;

    _glBindProgramARB glBindProgramARB;

    _glDeleteProgramsARB glDeleteProgramsARB;

    _glGenProgramsARB glGenProgramsARB;

    _glActiveTexture glActiveTexture;

    mutable QImage m_frame;

    QByteArray m_array;

    int m_width;

    int m_height;

    QRect m_drawFrameRect;

    GLuint m_texture[3];

    bool m_hasPrograms;

    GLuint m_program;

    bool m_yuvSupport;

    VideoWidget *m_videoWidget;

};

}

} //namespace Phonon::Gstreamer

QT_END_NAMESPACE

#endif //QT_OPENGL_ES

#endif // QT_NO_OPENGL

#endif // Phonon_GSTREAMER_GLRENDERER_H