mitkFbfbpSpeedUsingGpu.h

/*=========================================================================

  Program:   3DMed
  Date:      $Date: 2014-02-25 18:30:00 +0800 $
  Version:   $Version: 4.6.0 $
  Copyright: MIPG, Institute of Automation, Chinese Academy of Sciences

=========================================================================*/


#ifndef __mitkFbFbpUsingGpu_h
#define __mitkFbFbpUsingGpu_h

#include <GL/glew.h>
#include <GL/glut.h>
#include <Cg/cgGL.h>
#include "mitkProjectDataToVolumeFilter.h"
#include "mitkFanBeamProjectData.h"
#include "mitkReconstructionCGIncludes.h"

//#define PI 3.14159265358979
#define BLOCKNUM 7
#define FANWINDOWSIZE 7






class MITK_RECONSTRUCTION_CG_API mitkFbFbpSpeedUsingGpu: public mitkProjectDataToVolumeFilter  
{
public:
    template<class Ty> friend int t_ExecuteFbFbpUsingGpu(mitkFanBeamProjectData *input,mitkVolume *outdata,mitkFbFbpSpeedUsingGpu *self, Ty *a);

    MITK_TYPE(mitkFbFbpSpeedUsingGpu, mitkProjectDataToVolumeFilter)

    virtual void PrintSelf(ostream& os);
    
    mitkFbFbpSpeedUsingGpu();

    void SetFov(float m[4]);

protected:

    virtual ~mitkFbFbpSpeedUsingGpu();
    
    virtual bool Execute();

private:
    void initWindow();
  
    void initFBO();

    void initCG();

    void CheckForCgError(const char *situation);

    bool CreateTexture();

    void AttachFBO();

    void InputPrjectData(float *data);

    void ReadData(int slice, float *out);

    void SetTexMatrix(float angle);

    void EnableFshader();

    void EnableVshader();

    void DrawQuad(int h);

    void SetDtheta(float m) {dthetaDegree = m;}

    void SetFrustum(float zn,float zf,float zc, float detectorLength);

    void DestroyAll();

    void SetXrayNum(int m){xrayNum = m;}
    void SetAngleNum(int m){angleNum = m;}

    void SetWidth(int m){width = m;}
    void SetHeight(int m){height = m;}
    void SetImgslice(int m){imgslice = m;}

private:
    int xrayNum;
    int angleNum;

    int width;
    int height;
    int imgslice;


    struct TexParam 
    {
        const char *name;
        int unit;
        int target;
        int tex;
    };
    std::vector<TexParam> m_texParams;

    float v[4];
    float dthetaDegree;

    float zNear;
    float zFar;     //L
    float zCenter;  //D
    float nearDetectorLengthX;
    GLfloat frustum[16];

    GLuint windowHandle;    
    CGcontext cgContext;
    CGprofile fProfile ,vProfile;
    CGprogram fProgram ,vProgram;
    CGparameter mvpMatrixParam,preResultTexParam,
                texMatrixParam[BLOCKNUM];
    
    GLuint *projectDataID,  fbotex, *ResultID;
    GLuint fb;
    GLint m_preFboId;

    void _bindCurrentFBO();
    void _unBind();
    void _scanTexParams(CGprogram m_prog);
    void _setTexture(char *name, GLuint tex);
    void _bindTextures();


    mitkFbFbpSpeedUsingGpu(const mitkFbFbpSpeedUsingGpu&);
    void operator = (const mitkFbFbpSpeedUsingGpu&);

};

//#define DEFINED_mitkFbFbpUsingGpu

#endif 

---