test_closed_xld — Test whether contours or polygons are closed.
test_closed_xld tests each contour or polygon in XLD, whether it is closed and returns the result in IsClosed. If the contour contour or polygon is closed, the respective return value is 1, otherwise 0. A contour or polygon is closed, if its last point is equal to its first point.
Contours or polygons to be tested.
Tuple with boolean numbers.