/* defined in main.c */
long app_getmsec(void);
-void app_redisplay(void);
+void app_redisplay(int x, int y, int w, int h);
void app_swap_buffers(void);
void app_quit(void);
void app_resize(int x, int y);
void app_fullscreen(int fs);
void app_vsync(int vsync);
+void app_rband(int x, int y, int w, int h);
/* defined in scr_mod.c for convenience */
void primray(cgm_ray *ray, int x, int y);