/*
    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);
/* vi: set ts=4 sw=4 expandtab: */