`sig
type size_fun = int -> int -> int * int
val at_size : int -> int -> Rsvg.size_fun
val at_zoom : float -> float -> Rsvg.size_fun
val at_max_size : int -> int -> Rsvg.size_fun
val at_zoom_with_max : float -> float -> int -> int -> Rsvg.size_fun
val set_default_dpi : float -> unit
val render_from_string :
?gz:bool ->
?dpi:float ->
?size_cb:Rsvg.size_fun ->
?pos:int -> ?len:int -> string -> GdkPixbuf.pixbuf
val render_from_file :
?gz:bool ->
?dpi:float -> ?size_cb:Rsvg.size_fun -> string -> GdkPixbuf.pixbuf
end`