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/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
/*
* Copyright 2010 Andrea Canciani
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Author: Andrea Canciani <ranma42@gmail.com>
*/
#include "cairo-test.h"
#define SIZE 32
/*
When cairo_arc is used to draw an arc of more than 2pi radians
(i.e. a circle "looping over itself"), various different behaviors
are possible:
- draw exactly a circle (an arc of 2pi radians)
- draw an arc such that the current point is the expected one and
that does at least a complete circle (an arc of [2pi, 4pi)
radians)
- draw an arc with the original number of loops
This test produces different results for each of these three cases.
*/
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
double dashes[] = { 0.3, 7 };
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
cairo_save (cr);
cairo_translate (cr, SIZE * .5, SIZE * .5);
cairo_scale (cr, SIZE * 3 / 8., SIZE * 3 / 8.);
cairo_arc (cr, 0, 0, 1, 0, 11 * M_PI);
cairo_set_line_width (cr, 8. / SIZE);
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_set_dash (cr, dashes, 2, 0);
cairo_stroke (cr);
cairo_restore (cr);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (arc_looping_dash,
"Test cairo_arc for angles describing more than a complete circle",
"arc", /* keywords */
NULL, /* requirements */
SIZE, SIZE,
NULL, draw)
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