extern Colormap copy_colormap (Screen *, Visual *, Colormap from, Colormap to);
extern void blacken_colormap (Screen *, Colormap cmap);
extern void fade_screens (Display *dpy,
extern Colormap copy_colormap (Screen *, Visual *, Colormap from, Colormap to);
extern void blacken_colormap (Screen *, Colormap cmap);
extern void fade_screens (Display *dpy,