/* * Copyright © 2008 Chris Wilson * * Permission to use, copy, modify, distribute, and sell this software * and its documentation for any purpose is hereby granted without * fee, provided that the above copyright notice appear in all copies * and that both that copyright notice and this permission notice * appear in supporting documentation, and that the name of * Chris Wilson not be used in advertising or publicity pertaining to * distribution of the software without specific, written prior * permission. Chris Wilson makes no representations about the * suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS, IN NO EVENT SHALL CHRIS WILSON BE LIABLE FOR ANY SPECIAL, * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * * Author: Chris Wilson <chris@chris-wilson.co.uk> */ /* This test case exercises a "Potential division by zero in cairo_arc" * reported by Luiz Americo Pereira Camara <luizmed@oi.com.br>, * http://lists.cairographics.org/archives/cairo/2008-May/014054.html. */ #include "cairo-test.h" static cairo_test_status_t draw (cairo_t *cr, int width, int height) { int n; cairo_set_source_rgb (cr, 1, 1, 1); cairo_paint (cr); cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND); cairo_set_line_width (cr, 5); cairo_set_source_rgb (cr, 0, 1, 0); for (n = 0; n < 8; n++) { double theta = n * 2 * M_PI / 8; cairo_new_sub_path (cr); cairo_arc (cr, 20, 20, 15, theta, theta); cairo_close_path (cr); } cairo_stroke (cr); cairo_set_line_width (cr, 2); cairo_set_source_rgb (cr, 0, 0, 1); for (n = 0; n < 8; n++) { double theta = n * 2 * M_PI / 8; cairo_move_to (cr, 20, 20); cairo_arc (cr, 20, 20, 15, theta, theta); } cairo_stroke (cr); cairo_set_source_rgb (cr, 1, 0, 0); cairo_arc (cr, 20, 20, 2, 0, 2*M_PI); cairo_fill (cr); return CAIRO_TEST_SUCCESS; } CAIRO_TEST (degenerate_arc, "Tests the behaviour of degenerate arcs", "degenerate", /* keywords */ NULL, /* requirements */ 40, 40, NULL, draw)