gdk:cursor-surface (cursor)

cursor -- a gdk:cursor object

surface -- a cairo:surface-t instance representing a cursor
xhot -- a double float with the hotspot x position
yhot -- a double float with the hotspot y position

Returns a Cairo image surface with the image used to display the cursor. Note that depending on the capabilities of the windowing system and on the cursor, GDK may not be able to obtain the image data. In this case, nil is returned.