2 * Copyright © 2008 Red Hat, Inc.
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * Author: Carl D. Worth <cworth@cworth.org>
27 #include "cairo-test.h"
31 #define WIDTH (PAD + LINE_WIDTH + PAD)
32 #define HEIGHT (WIDTH)
34 static cairo_test_status_t
35 draw (cairo_t *cr, int width, int height)
37 cairo_translate (cr, PAD, PAD);
39 /* Paint background white, then draw in black. */
40 cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
42 cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
44 cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
45 cairo_set_line_width (cr, LINE_WIDTH);
47 /* The default miter limit value of 10.0 guarantees that
48 * right-angle turns, (in fact, any angle greater than 11
49 * degrees), gets a miter rather than a bevel join. The
50 * rectilinear stroke optimization was originally written in a
51 * buggy way that did not respect the miter limit, (that is,
52 * inappropriately drawing miter joins when the miter limit would
53 * turn them into bevels). So we draw here with a miter limit of
54 * 1.0 to force all miter joins into bevels. */
55 cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER);
56 cairo_set_miter_limit (cr, 1.0);
58 cairo_move_to (cr, LINE_WIDTH / 2.0, LINE_WIDTH);
59 cairo_rel_line_to (cr, 0, - LINE_WIDTH / 2.0);
60 cairo_rel_line_to (cr, LINE_WIDTH / 2.0, 0);
64 return CAIRO_TEST_SUCCESS;
67 CAIRO_TEST (rectilinear_miter_limit,
68 "Test that the rectilinear stroke optimization doesn't break cairo_set_miter_limit",
69 "miter, stroke, stress", /* keywords */
70 NULL, /* requirements */