sig
val init : unit -> unit
val get_visual : unit -> Gdk.visual
val get_cmap : unit -> Gdk.colormap
val 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
end