module Pvr:sig..end
val pv_ci : unit -> unit
val pv_bg : int * int * int -> unit
val pv_cm : int * int * int -> int * int * int -> unit
val pv_ls : int * int * int -> int * int * int -> unit
val pv_gs : int * int * int -> unit
val pv_sh : int * int * int -> float -> int * int * int -> float * float * float -> unit
val pv_cb : float -> int * int * int -> float * float * float -> unit
val pv_gd : int * int * int -> int * int * int -> unit