/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Lesser General Public

    License as published by the Free Software Foundation; either

    version 2.1 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

    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public

    License along with this library; if not, write to the Free Software

    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga

    slouken@libsdl.org

*/

#include "SDL_config.h"

#if SDL_VIDEO_OPENGL_GLX

#include <GL/glx.h>

#include "SDL_loadso.h"

#endif

#include "../SDL_sysvideo.h"

struct SDL_PrivateGLData {

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

#if SDL_VIDEO_OPENGL_GLX

    GLXContext glx_context;	/* Current GL context */

    XVisualInfo* glx_visualinfo; /* XVisualInfo* returned by glXChooseVisual */

    void * (*glXGetProcAddress)(const GLubyte *procName);

    XVisualInfo* (*glXChooseVisual)

		( Display*		dpy,

		  int			screen,

		  int*			attribList );

    GLXContext (*glXCreateContext)

		( Display*		dpy,

		  XVisualInfo*		vis,

		  GLXContext		shareList,

		  Bool			direct );

    void (*glXDestroyContext)

		( Display* 		dpy,

		  GLXContext		ctx );

    Bool (*glXMakeCurrent)

		( Display*		dpy,

		  GLXDrawable		drawable,

		  GLXContext		ctx );

    void (*glXSwapBuffers)

		( Display*		dpy,

		  GLXDrawable		drawable );

    int (*glXGetConfig)

	 ( Display* dpy,

	   XVisualInfo* visual_info,

	   int attrib,

	   int* value );

    const char *(*glXQueryExtensionsString)

	    ( Display* dpy,

	      int screen );

    int (*glXSwapIntervalSGI) ( int interval );

    GLint (*glXSwapIntervalMESA) ( unsigned interval );

    GLint (*glXGetSwapIntervalMESA) ( void );

#endif /* SDL_VIDEO_OPENGL_GLX */

};

/* Old variable names */

#define gl_active		(this->gl_data->gl_active)

#define glx_context		(this->gl_data->glx_context)

#define glx_visualinfo		(this->gl_data->glx_visualinfo)

/* OpenGL functions */

extern XVisualInfo *X11_GL_GetVisual(_THIS);

extern int X11_GL_CreateWindow(_THIS, int w, int h);

extern int X11_GL_CreateContext(_THIS);

extern void X11_GL_Shutdown(_THIS);

#if SDL_VIDEO_OPENGL_GLX

extern int X11_GL_MakeCurrent(_THIS);

extern int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value);

extern void X11_GL_SwapBuffers(_THIS);

extern int X11_GL_LoadLibrary(_THIS, const char* path);

extern void *X11_GL_GetProcAddress(_THIS, const char* proc);

#endif

extern void X11_GL_UnloadLibrary(_THIS);