-/* xscreensaver, Copyright (c) 1993-2000 by Jamie Zawinski <jwz@jwz.org>
+/* xscreensaver, Copyright (c) 1993-2014 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 Visual *get_overlay_visual (Screen *, unsigned long *pixel_return);
extern Bool has_writable_cells (Screen *, Visual *);
extern Visual *id_to_visual (Screen *, int);
+extern int get_bits_per_pixel(Display *dpy, int depth);
extern Visual *get_gl_visual (Screen *);
extern void describe_gl_visual (FILE *, Screen *, Visual *, Bool priv_cmap_p);