-extern int x_bitmap_height P_ ((struct frame *, int));
-extern int x_bitmap_width P_ ((struct frame *, int));
-extern int x_bitmap_pixmap P_ ((struct frame *, int));
-extern void x_reference_bitmap P_ ((struct frame *, int));
-extern int x_create_bitmap_from_data P_ ((struct frame *, char *,
- unsigned int, unsigned int));
-extern int x_create_bitmap_from_file P_ ((struct frame *, Lisp_Object));
-extern void x_destroy_bitmap P_ ((struct frame *, int));
-extern int x_create_bitmap_mask P_ ((struct frame * , int));