RTVolumeRendering/Source/VolumeTexture.h

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#ifndef VOLUMETEXTURE_H
#define VOLUMETEXTURE_H

#include <gl/glew.h>
#include <string>
#include "MathCommon.h"

struct VTInfo
{
        int width;      
        int height;     
        int depth;      
        int components; 
        int size;       
};

class VolumeTexture
{
public:
        VolumeTexture();
        
        ~VolumeTexture();

        bool Load(const char *file, const char *path, VTInfo *info = NULL);
        
        VTInfo GetInfo() const { return loadedVTinfo; }
        
        void Bind(int unit = 0);

        int CopyHistogram(unsigned int *data, int n);

        void UnBind();

        GLuint GetTextureID() const { return tex; }
        
protected:
        
        bool LoadRAW(const char *filename, int w, int h, int d, int components);

        void Precompute(const unsigned char *data, int w, int h, int d, unsigned char *res);

        Vector3f ComputeNormal(const unsigned char *data, int x, int y, int z, int w, int h, int d);
        
        GLuint tex;

        int boundUnit; // set to -1 when the texture us unbound.

        unsigned int histogram[256];
        
        VTInfo loadedVTinfo;
};

#endif

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