glOffscreenTarget.h

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// -*- Mode: C++; tab-width: 2; -*-
// vi: set ts=2:
//

#ifndef BALL_VIEW_RENDERING_GLOFFSCREENTARGET_H
#define BALL_VIEW_RENDERING_GLOFFSCREENTARGET_H

#ifndef BALL_COMMON_GLOBAL_H
# include <BALL/COMMON/global.h>
#endif

#ifndef BALL_VIEW_RENDERING_RENDERWINDOW_H
# include <BALL/VIEW/RENDERING/renderWindow.h>
#endif

#ifndef BALL_VIEW_RENDERING_GLRENDERWINDOW_H
# include <BALL/VIEW/RENDERING/glRenderWindow.h>
#endif


#include <QtGui/QPaintDevice>

#include <boost/shared_ptr.hpp>

class QGLPixelBuffer;

namespace BALL
{
  namespace VIEW
  {       
    class BALL_VIEW_EXPORT GLOffscreenTarget
      : public RenderWindow,
        public QPaintDevice
    {
      public:
        GLOffscreenTarget(GLRenderWindow* share_from, const String& filename);

        virtual void prepareRendering();
        virtual void prepareUpscaling(Size final_width, Size final_height);

        virtual bool resize(const unsigned int width, const unsigned int height);
        virtual void refresh();

        void tryUsePixelBuffer(bool use_pbo = true);

        QImage getImage();
        void updateImageTile(Size x_lower, Size y_lower, Size x_upper, Size y_upper);

        virtual QPaintEngine* paintEngine() const;
        virtual int metric(PaintDeviceMetric metric) const;

      protected:
        String         filename_;

        GLRenderWindow* share_from_;

        boost::shared_ptr<QGLPixelBuffer> pixel_buffer_;

        bool use_pixel_buffer_;

        QImage current_image_;
    };

  }
}
#endif // BALL_VIEW_RENDERING_GLOFFSCREENTARGET_H