-/* xscreensaver, Copyright (c) 1993-1998 by Jamie Zawinski <jwz@netscape.com>
+/* xscreensaver, Copyright (c) 1993-2000 by Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
extern void describe_visual (FILE *f, Screen *, Visual *, Bool private_cmap_p);
extern Visual *get_overlay_visual (Screen *, unsigned long *pixel_return);
extern Bool has_writable_cells (Screen *screen, Visual *visual);
+extern Visual *id_to_visual (Screen *screen, int id);
+
+extern Visual *get_gl_visual (Screen *);
+extern void describe_gl_visual (FILE *, Screen *, Visual *, Bool priv_cmap_p);
+extern Bool validate_gl_visual (FILE *, Screen *, const char *, Visual *);
#endif /* __VISUAL_H__ */