module Rgb:sig..end
val init : unit -> unitval get_visual : unit -> Gdk.visualval get_cmap : unit -> Gdk.colormapval draw_image : [> `drawable ] Gobject.obj ->
Gdk.gc ->
width:int ->
height:int ->
?x:int ->
?y:int ->
?dither:Gdk.Tags.rgb_dither -> ?row_stride:int -> Gpointer.region -> unit