/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

/* Atari OSMesa.ldg implementation of SDL OpenGL support */

#ifndef _SDL_ATARIGL_H_
#define _SDL_ATARIGL_H_

#ifdef HAVE_OPENGL
#include <GL/osmesa.h>
#endif

#include "SDL_sysvideo.h"
#define _THIS   SDL_VideoDevice *this

struct SDL_PrivateGLData {
	/* to stop switching drivers while we have a valid context */
    int gl_active; 

	/* for unsupported OSMesa buffer formats */
	void (*ConvertSurface)(SDL_Surface *surface);	

#ifdef HAVE_OPENGL
	OSMesaContext	ctx;
#endif
};

/* Old variable names */
#define gl_active	(this->gl_data->gl_active)
#define gl_ctx		(this->gl_data->ctx)
#define gl_convert	(this->gl_data->ConvertSurface)

/* OpenGL functions */
extern int SDL_AtariGL_Init(_THIS, SDL_Surface *current);
extern void SDL_AtariGL_Quit(_THIS);

extern int SDL_AtariGL_LoadLibrary(_THIS, const char *path);
extern void *SDL_AtariGL_GetProcAddress(_THIS, const char *proc);
extern int SDL_AtariGL_GetAttribute(_THIS, SDL_GLattr attrib, int* value);
extern int SDL_AtariGL_MakeCurrent(_THIS);
extern void SDL_AtariGL_SwapBuffers(_THIS);

#endif /* _SDL_ATARIGL_H_ */