rawVolModel.h

/* Copyright (c) 2007       Maxim Makhinya
 *
 * 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 EVOLVE_RAW_VOL_MODEL_H
#define EVOLVE_RAW_VOL_MODEL_H

#include <eq/eq.h>

namespace eVolve
{

    struct DataInTextureDimensions
    {
        float W;    
        float H;    
        float D;    
        float Do;   
        float Db;   
    };

    struct VolumeScaling
    {
        float W;    
        float H;    
        float D;    
    };

    struct VolumeInfo
    {
        GLuint                  volume;     
        GLuint                  preint;     
        VolumeScaling           volScaling; 
        DataInTextureDimensions TD; 
    };

    class RawVolumeModel
    {
    public:
        RawVolumeModel( const std::string& filename );

        bool loadHeader( const float brightness, const float alpha );

        bool getVolumeInfo( VolumeInfo& info, const eq::Range& range );

        void releaseVolumeInfo( const eq::Range& range );

        const std::string&   getFileName()      const { return _filename;    };
              uint32_t       getResolution()    const { return _resolution;  };
        const VolumeScaling& getVolumeScaling() const { return _volScaling;  };

        void glewSetContext( GLEWContext* context ) { _glewContext = context; }

        GLEWContext* glewGetContext() { return _glewContext; }

    protected:

        bool _createVolumeTexture(
                                      GLuint&                  volume,
                                      DataInTextureDimensions& TD,
                                const eq::Range&               range );

    private:
        bool _lFailed( char* msg )
            { EQERROR << msg << std::endl; return false; }

        struct VolumePart
        {
            GLuint                  volume; 
            DataInTextureDimensions TD;     
        };

        stde::hash_map< int32_t, VolumePart > _volumeHash; 

        bool         _headerLoaded;     
        std::string  _filename;         

        GLuint       _preintName;       

        uint32_t     _w;                
        uint32_t     _h;                
        uint32_t     _d;                
        uint32_t     _resolution;       

        VolumeScaling _volScaling;      

        std::vector< uint8_t >  _TF;    

        GLEWContext*   _glewContext;    
    };

}

#endif // EVOLVE_RAW_VOL_MODEL_H