-/* Save current game data to file "savefile". */
-extern void save_game(struct World * world);
-
-
-
-/* Toggle display of a window "win". */
-extern void toggle_window(struct WinMeta * win_meta, struct Win * win);
-
-
-
-/* Try to scroll virtual screen left ("dir" = "-") or right ("dir" = "+"),
- * subject to the limitations provided by the window manager via
- * reset_pad_offset().
+/* Return the offset necessary to center a map of "mapsize" on position "pos" in
+ * a frame of "framesize.