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Diffstat (limited to 'libs/cairo-1.16.0/test/degenerate-arc.c')
| -rw-r--r-- | libs/cairo-1.16.0/test/degenerate-arc.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/degenerate-arc.c b/libs/cairo-1.16.0/test/degenerate-arc.c new file mode 100644 index 0000000..081bfa5 --- /dev/null +++ b/libs/cairo-1.16.0/test/degenerate-arc.c @@ -0,0 +1,74 @@ +/* + * 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>, + * https://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) |