mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
synced 2025-12-20 18:40:08 +01:00
83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
|
/*
|
||
|
|
* 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_draw_function_t draw;
|
||
|
|
|
||
|
|
cairo_test_t test = {
|
||
|
|
"degenerate-arc",
|
||
|
|
"Tests the behaviour of degenerate arcs",
|
||
|
|
40, 40,
|
||
|
|
draw
|
||
|
|
};
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
main (void)
|
||
|
|
{
|
||
|
|
return cairo_test (&test);
|
||
|
|
}
|