/* osgCompute - Copyright (C) 2008-2009 SVT Group
*                                                                     
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*                                                                     
* 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 Lesse General Public License for more details.
*
* The full license is in LICENSE file included with this distribution.
*/

#ifndef TEXSTREAMER_H
#define TEXSTREAMER_H 1

#include <osg/ref_ptr>
#include <vector_types.h>
#include <osgCompute/Computation>
#include <osgCompute/Memory>

namespace TexDemo
{
    class TexStreamer : public osgCompute::Computation 
    {
    public:
        enum Filter
        {
            SOBEL_FILTER = 0,
            GAUSS5x5_FILTER = 1,
        };

    public:
        TexStreamer() : osgCompute::Computation() {clearLocal();}


        // Computations have to implement at least these
        // three methods:
        virtual bool init();
        virtual void launch();
        virtual void acceptResource( osgCompute::Resource& resource );

        virtual void clear() { clearLocal(); osgCompute::Computation::clear(); }

        inline void setFilter( Filter filter ) { _filter = filter; }

    protected:
        virtual ~TexStreamer() { clearLocal(); }
        void clearLocal();

        dim3											  _blocks;
        dim3											  _threads;
        osg::ref_ptr<osgCompute::Memory>                  _srcBuffer;
        osg::ref_ptr<osgCompute::Memory>                  _trgBuffer;
        Filter                                            _filter;

    private:
        TexStreamer(const TexStreamer&, const osg::CopyOp& ) {} 
        inline TexStreamer &operator=(const TexStreamer &) { return *this; }
    };

};

#endif // TEXSTREAMER_H
