+extern Pixmap
+xscreensaver_logo (Screen *screen, Visual *visual,
+ Drawable drawable, Colormap cmap,
+ unsigned long background_color,
+ unsigned long **pixels_ret, int *npixels_ret,
+ Pixmap *mask_ret,
+ Bool big_p);
+
+
+/* A utility function for event-handler functions:
+ Returns True if the event is a simple click, Space, Tab, etc.
+ Returns False otherwise.
+ The idea here is that most hacks interpret to clicks or basic
+ keypresses as "change it up".
+ */
+extern Bool screenhack_event_helper (Display *, Window, XEvent *);