void snapshot ( GdkPaintable* paintable, GdkSnapshot* snapshot, double width, double height )
Snapshots the given paintable with the given
The paintable is drawn at the current (0,0) offset of the
height are not larger than zero, this function will
GdkSnapshotto snapshot to.
The data is owned by the caller of the function.
Width to snapshot in.
Height to snapshot in.