ipltexture.h

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#ifndef _IPLTEXTURE_H
#define _IPLTEXTURE_H

#include <cv.h>

#ifdef HAVE_CONFIG_H
#include <config.h>
#else
#ifdef WIN32
        // Comment this out if you do not have GLEW installed.
#define HAVE_GLEW
#endif
#endif

#ifdef HAVE_GLEW
#include <GL/glew.h>
#ifndef HAVE_GL
#define HAVE_GL
#endif
#else
#ifdef WIN32
#include <windows.h>
#include <GL/gl.h>
#define HAVE_GL
#endif

#ifdef HAVE_GL
#ifdef HAVE_APPLE_OPENGL_FRAMEWORK
#include <OpenGL/gl.h>
#else
#include <GL/gl.h>
#endif
#endif
#endif


class IplTexture {

public:
        IplTexture(IplImage *image=0, bool cache=true, bool smooth=true) 
                : im(image), downsampled(0), allowCache(cache), reload(true),  
                smooth(smooth), textureGenerated(false), refcnt(1) {}
        
        virtual ~IplTexture();
                
        void genTexture();
        void loadTexture();
        void disableTexture();
        void update() { reload=true; }
        void setImage(IplImage *image);
        IplImage *getImage() { return im; }
        IplImage *getIm() { return im; }
        const IplImage *getIm() const { return im; }
        void freeImage() { if (this && im) { cvReleaseImage(&im); } }

        double u(double x) { return x*uScale; }

        double v(double y) { return y*vScale + vOrigin; }

        void regen(); 

        void addRef() { refcnt++; }

        void unref();
        
        void clearWithoutDelete() { im = downsampled = 0; }

private:
        IplImage *im;
        IplImage *downsampled;

        bool allowCache;
        bool reload;
        bool smooth;
        bool textureGenerated;
        int refcnt;
        unsigned int texture;
        double uScale, vScale, vOrigin;
        int texWidth, texHeight;
};

#endif