diguyOglGraphicsFrameBuffer.h

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/****************************************************************************
 * Copyright (c) 2024 MAK Technologies, Inc.
 * All rights reserved.
 ****************************************************************************/

#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) override;

   virtual void bind() override;
   virtual void clear() override;
   virtual void unbind() override;

   virtual GLuint get_texture_id() override { return m_texture_id; }
   virtual GLuint get_frame_buffer_id() override { return m_frame_buffer_object_id; }
   virtual GLuint get_depth_texture_id() override { 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];
   int m_original_FBO_id;
   int m_original_RBO_id;

};


diguyGraphicsFrameBuffer* diguyOglGraphicsFrameBuffer_create_func();