diguyOglGraphicsFrameBuffer.h

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#pragma once

#if WIN32
#include <windows.h>
#endif 
// needed for function prototypes
#include <GL/glew.h>
#include <GL/gl.h>

#include <diguyGraphicsFrameBuffer.h>

class diguyOglGraphicsFrameBuffer : public diguyGraphicsFrameBuffer
{
public:

        diguyOglGraphicsFrameBuffer();
        virtual ~diguyOglGraphicsFrameBuffer();

        virtual int resize(int width, int height);
        
        virtual void bind();
        virtual void clear();
        virtual void unbind();

        virtual GLuint get_texture_id() { return m_texture_id; }
        virtual GLuint get_frame_buffer_id() { return m_frame_buffer_object_id; }
        virtual GLuint get_depth_texture_id() { return m_depth_texture_id; };

        int get_width() { return m_width; }
        int get_height() { return m_height; }

private:

        int create_buffers();

        int check_status();

        int destroy_buffers();

        /*
        *  Common data members.
        */

        bool m_enable_mipmaps;

        bool m_initialized;
        GLuint m_texture_id;
        GLuint m_depth_texture_id;

        /*
        *  Frame buffer object data members.
        */
        bool m_fbo_valid;

        GLuint m_frame_buffer_object_id;
        GLuint m_depth_render_buffer_id;

        /*
        *  State to save and restore between bind() and unbind().
        */
        int m_original_vp[4];
};


diguyGraphicsFrameBuffer* diguyOglGraphicsFrameBuffer_create_func();