accumBufferObject.h

/* Copyright (c) 2009-2010, 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

namespace eq
{
namespace util
{
    class Texture;

    class AccumBufferObject : public FrameBufferObject
    {
    public: 
        EQ_EXPORT AccumBufferObject( GLEWContext* const glewContext );

        EQ_EXPORT ~AccumBufferObject();

        EQ_EXPORT bool init( const PixelViewport& pvp,
                             GLuint format );

        EQ_EXPORT void exit();

        EQ_EXPORT void load( GLfloat value );

        EQ_EXPORT void accum( GLfloat value );

        EQ_EXPORT void display( GLfloat value );

    private:
        void _drawQuadWithTexture( Texture* texture, const PixelViewport& pvp, GLfloat value );

        Texture* _texture;
        PixelViewport _pvp;
    };
}
}

#endif // EQUTIL_ACCUMBUFFEROBJECT_H