psychon's example in scheme added by C-Keen on Fri Mar 9 14:29:17 2012
(import foreign) (use cairo doodle) (new-doodle width: 200 height: 200 background: solid-white) (define-inline (print-clipping-area) (let-location ((x1 double 2) (y1 double 3) (x2 double 4) (y2 double 5)) (cairo-clip-extents (*c*) #$x1 #$y1 #$x2 #$y2) (printf "Clipping extents: ~a x ~a - ~a x ~a~%" x1 y1 x2 y2))) (print-clipping-area) (rectangle 10 10 100 100 '(1 0 0 1)) (cairo-stroke (*c*)) (rectangle 10 10 10 10 '(1 0 0 1)) (cairo-clip (*c*)) (print-clipping-area) (run-event-loop)