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#ifndef QOPENGLPAINTDEVICE_P_H
#define QOPENGLPAINTDEVICE_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of the QtGui module.  This header file may change from
// version to version without notice, or even be removed.
//
// We mean it.
//


#include <qpaintdevice.h>
#include <QtGui/qopengl.h>
#include <QtGui/qopenglcontext.h>

QT_BEGIN_NAMESPACE

class Q_GUI_EXPORT QOpenGLPaintDevice : public QPaintDevice
{
public:
    QOpenGLPaintDevice();
    virtual ~QOpenGLPaintDevice();

    int devType() const {return QInternal::OpenGL;}

    virtual void beginPaint();
    virtual void ensureActiveTarget();
    virtual void endPaint();

    virtual QOpenGLContextGroup *group() const = 0;

    virtual QSurfaceFormat format() const = 0;
    virtual QSize size() const = 0;

    virtual bool alphaRequested() const = 0;
    virtual bool isFlipped() const;

    // returns the QOpenGLPaintDevice for the given QPaintDevice
    static QOpenGLPaintDevice* getDevice(QPaintDevice*);

protected:
    int metric(QPaintDevice::PaintDeviceMetric metric) const;
    GLuint m_previousFBO;
    GLuint m_thisFBO;
};


#if 0
// Wraps a QOpenGLWidget
class QOpenGLWidget;
class Q_GUI_EXPORT QOpenGLWidgetGLPaintDevice : public QOpenGLPaintDevice
{
public:
    QOpenGLWidgetGLPaintDevice();

    virtual QPaintEngine* paintEngine() const;

    // QOpenGLWidgets need to do swapBufers in endPaint:
    virtual void beginPaint();
    virtual void endPaint();
    virtual QSize size() const;
    virtual QOpenGLContext* context() const;

    void setWidget(QOpenGLWidget*);

private:
    friend class QOpenGLWidget;
    QOpenGLWidget *glWidget;
};
#endif

QT_END_NAMESPACE

#endif // QOPENGLPAINTDEVICE_P_H