FrameBufferGLX.h

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/* $Id:$ */

#ifndef __FRAME_BUFFER_GLX_H
#define __FRAME_BUFFER_GLX_H

#include <gra/framebuffer/FrameBuffer.h>
#include <GL/glx.h>
#include <GL/gl.h>
#include <unistd.h>

using namespace esg;

namespace gra {

class GRA_EXPORT FrameBufferGLX : public FrameBuffer {
    protected:
        Display            * _pDisplay;
        XVisualInfo        * _pVisualInfo;
        Colormap             _colormap;
        Window               _win;
        GLXContext           _context;
        XEvent               _event;
        XSetWindowAttributes _winAttr;
        XImage             * _pImage;
        XGCValues            _gcValues;
        GC                   _gc;
        
        unsigned long _shiftRed;
        unsigned long _shiftGreen;
        unsigned long _shiftBlue;
        bool          _byteRev;

    protected:
        void _init(const char *);
        void _destroy();
        
    public:
        FrameBufferGLX(unsigned mode, const char * name = NULL)
            : FrameBuffer(mode) { _init(name); }
        FrameBufferGLX(unsigned width, unsigned height, unsigned mode, const char * name = NULL)
            : FrameBuffer(width, height, mode) { _init(name); }
    
        virtual ~FrameBufferGLX() { _destroy(); }

        virtual void setWidth (unsigned);
        virtual void setHeight(unsigned);

        virtual void showContent();

        virtual void setColor(const Camera&  /* camera */,
                              unsigned       /* posX   */,
                              unsigned       /* posY   */,
                              float          /* depth  */,
                              const Color3f& /* color  */);
        
        virtual void setColor(const Camera&  /* camera */,
                              unsigned       /* posX   */,
                              unsigned       /* posY   */,
                              const Color3f& /* color  */);
        
        virtual void setColors(const Camera&    /* camera */,
                               unsigned         /* posX   */,
                               unsigned         /* posY   */,
                               float            /* depth  */,
                               const Color3f [] /* colors */,
                               unsigned         /* size   */);
        
        virtual void setColors(const Camera&    /* camera */,
                               unsigned         /* posX   */,
                               unsigned         /* posY   */,
                               const Color3f [] /* colors */,
                               unsigned         /* size   */);

        virtual Color3f getColor(unsigned /* posX */,
                                 unsigned /* posY */) const;

        virtual void clearColor(const Color3f& /* color */);

};

} // namespace

#endif // __FRAME_BUFFER_GLX_H

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