(* Example by Ãyvind KolÃ¥s taken from http://cairographics.org/samples/ *) open Cairo let two_pi = 8. *. atan 1. let () = let cr = Cairo.create(Cairo.PDF.create "set_line_cap.pdf" 400. 300.) in let line x = set_source_rgb cr 0. 0. 0.; set_line_width cr 30.0; move_to cr x 50.0; line_to cr x 200.0; stroke cr; (* draw helping lines *) set_source_rgb cr 1. 0.2 0.2; set_line_width cr 2.56; move_to cr x 50.0; line_to cr x 200.0; stroke cr in set_line_cap cr BUTT; (* default *) line 64.0; set_line_cap cr ROUND; line 128.0; set_line_cap cr SQUARE; line 192.0; Surface.finish(get_target cr)