accumBufferObject.h

/* Copyright (c) 2009-2013, Stefan Eilemann <eile@equalizergraphics.com>
 *                    2009, Sarah Amsellem <sarah.amsellem@gmail.com>
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License version 2.1 as published
 * by the Free Software Foundation.
 *
 * 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef EQUTIL_ACCUMBUFFEROBJECT_H
#define EQUTIL_ACCUMBUFFEROBJECT_H

#include <eq/util/frameBufferObject.h> // base class
#include <eq/util/types.h>

#include <eq/fabric/pixelViewport.h> // member

namespace eq
{
namespace util
{
class AccumBufferObject : public FrameBufferObject
{
public:
    EQ_API explicit AccumBufferObject(const GLEWContext* const glewContext);

    EQ_API ~AccumBufferObject();

    EQ_API bool init(const PixelViewport& pvp, const unsigned format);

    EQ_API void exit();

    EQ_API void load(const float value);

    EQ_API void accum(const float value);

    EQ_API void display(const float value);

    EQ_API bool resize(const PixelViewport& pvp);

private:
    void _setup(const PixelViewport& pvp);
    void _reset();

    void _drawQuadWithTexture(Texture* texture, const PixelViewport& pvp,
                              const float value);

    Texture* _texture;
    PixelViewport _pvp;
    int _previousFBO;
};
}
}

#endif // EQUTIL_ACCUMBUFFEROBJECT_H