sig
  type t
  external of_filename :
    filename:string -> ?dir:CL_VirtualDirectory.t -> unit -> CL_PixelBuffer.t
    = "caml_CL_PixelBuffer_of_filename"
  external of_file :
    file:'a CL_IODevice.t -> image_type:string -> CL_PixelBuffer.t
    = "caml_CL_PixelBuffer_of_file"
  external delete : CL_PixelBuffer.t -> unit = "caml_CL_PixelBuffer_delete"
end