accum.h

/* Copyright (c) 2009-2014, 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_ACCUM_H
#define EQUTIL_ACCUM_H

#include <eq/util/types.h>

namespace eq
{
namespace util
{
namespace detail { class Accum; }

class Accum
{
public:
    EQ_API explicit Accum( const GLEWContext* const glewContext );

    EQ_API ~Accum();

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

    EQ_API void exit();

    EQ_API bool resize( const PixelViewport& pvp );
    EQ_API bool resize( const int width, const int height ); 

    EQ_API void clear();

    EQ_API void accum();

    EQ_API void display();

    EQ_API uint32_t getMaxSteps() const;

    EQ_API uint32_t getNumSteps() const;

    EQ_API void setTotalSteps( uint32_t totalSteps );

    EQ_API uint32_t getTotalSteps();

    EQ_API bool usesFBO() const;

    EQ_API static bool usesFBO( const GLEWContext* glewContext );

    EQ_API const GLEWContext* glewGetContext() const;

private:
    Accum( const Accum& ) = delete;
    Accum& operator=( const Accum& ) = delete;
    detail::Accum* const _impl;
};
}
}

#endif // EQUTIL_ACCUM_H