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/*
* Copyright © 2006 Jeff Muizelaar
*
* 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
* Jeff Muizelaar not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Jeff Muizelaar makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* JEFF MUIZELAAR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL JEFF MUIZELAAR 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: Jeff Muizelaar <jeff@infidigm.net>
*/
#include "cairo-test.h"
#define PAD 3.0
#define LINE_WIDTH 6.0
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
const cairo_line_cap_t cap[] = { CAIRO_LINE_CAP_ROUND, CAIRO_LINE_CAP_SQUARE, CAIRO_LINE_CAP_BUTT };
size_t i;
double dash[] = {2, 2};
double dash_long[] = {6, 6};
cairo_set_source_rgb (cr, 1, 0, 0);
for (i=0; i<ARRAY_SIZE(cap); i++) {
cairo_save (cr);
cairo_set_line_cap (cr, cap[i]);
/* simple degenerate paths */
cairo_set_line_width (cr, LINE_WIDTH);
cairo_move_to (cr, LINE_WIDTH, LINE_WIDTH);
cairo_line_to (cr, LINE_WIDTH, LINE_WIDTH);
cairo_stroke (cr);
cairo_translate (cr, 0, 3*PAD);
cairo_move_to (cr, LINE_WIDTH, LINE_WIDTH);
cairo_close_path (cr);
cairo_stroke (cr);
/* degenerate paths starting with dash on */
cairo_set_dash (cr, dash, 2, 0.);
cairo_translate (cr, 0, 3*PAD);
cairo_move_to (cr, LINE_WIDTH, LINE_WIDTH);
cairo_line_to (cr, LINE_WIDTH, LINE_WIDTH);
cairo_stroke (cr);
cairo_translate (cr, 0, 3*PAD);
cairo_move_to (cr, LINE_WIDTH, LINE_WIDTH);
cairo_close_path (cr);
cairo_stroke (cr);
/* degenerate paths starting with dash off */
/* these should not draw anything */
cairo_set_dash (cr, dash, 2, 2.);
cairo_translate (cr, 0, 3*PAD);
cairo_move_to (cr, LINE_WIDTH, LINE_WIDTH);
cairo_line_to (cr, LINE_WIDTH, LINE_WIDTH);
cairo_stroke (cr);
cairo_translate (cr, 0, 3*PAD);
cairo_move_to (cr, LINE_WIDTH, LINE_WIDTH);
cairo_close_path (cr);
cairo_stroke (cr);
/* this should draw a single degenerate sub-path
* at the end of the path */
cairo_set_dash (cr, dash_long, 2, 6.);
cairo_translate (cr, 0, 3*PAD);
cairo_move_to (cr, LINE_WIDTH + 6.0, LINE_WIDTH);
cairo_line_to (cr, LINE_WIDTH, LINE_WIDTH);
cairo_stroke (cr);
/* this should draw a single degenerate sub-path
* at the end of the path. The difference between this
* and the above is that this ends with a degenerate sub-path*/
cairo_set_dash (cr, dash_long, 2, 6.);
cairo_translate (cr, 0, 3*PAD);
cairo_move_to (cr, LINE_WIDTH + 6.0, LINE_WIDTH);
cairo_line_to (cr, LINE_WIDTH, LINE_WIDTH);
cairo_line_to (cr, LINE_WIDTH, LINE_WIDTH);
cairo_stroke (cr);
cairo_restore (cr);
cairo_translate (cr, PAD+LINE_WIDTH+PAD, 0);
}
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (degenerate_path,
"Tests the behaviour of degenerate paths with different cap types",
"degenerate", /* keywords */
NULL, /* requirements */
3*(PAD+LINE_WIDTH+PAD), 8*(LINE_WIDTH+PAD) + PAD,
NULL, draw)
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