flowvis_program.h

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#ifndef FLOWVIS_PROGRAM_H
#define FLOWVIS_PROGRAM_H

#include <glew.h>
#include <string>

class FlowVisProgram {
public:
    enum Mode {
        M_BG_INTER, 
        M_TEXTURE_ROTATION 
    };

    explicit FlowVisProgram(const char *name);

    ~FlowVisProgram();

    void SetTransferFunctionTexture(GLuint tex);
    
    void SetBGDataTexture(GLuint tex);

    void SetVelocityTexture(GLuint tex);

    void SetArrowTexture(GLuint tex);

    void SetGlyphTexture(GLuint tex);

    void Use();

    void Prepare();

    void Start();

    void Stop();

    void SetMode(Mode new_mode);
    
private:

    GLuint CompileProgram(const char *name) const;

    GLuint m_transfer_texture_;

    GLuint m_bgdata_texture_;

    GLuint m_velocity_texture_;

    GLuint m_arrow_texture_;

    GLuint m_glyph_texture_;

    void RecompileWhenRequired();

    GLuint program_;
    
    bool recompile_;
    std::string progname_;

    Mode m_mode;
};

#endif // FLOWVIS_PROGRAM_H

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