2 * Copyright © 2011 Intel Corporation
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: Chris Wilson <chris@chris-wilson.co.uk>
27 #include "cairo-test.h"
29 #define LINE_WIDTH 30.
30 #define SIZE (2 * LINE_WIDTH)
31 #define PAD (2 * LINE_WIDTH)
34 make_path (cairo_t *cr, double theta)
36 double line_width = cairo_get_line_width (cr) / 4;
38 cairo_move_to (cr, 0, 0);
39 cairo_rel_curve_to (cr,
44 cairo_rel_line_to (cr,
45 cos (theta) * line_width,
46 sin (theta) * line_width);
50 draw_joins (cairo_t *cr, double theta)
52 make_path (cr, theta);
53 cairo_set_line_join (cr, CAIRO_LINE_JOIN_BEVEL);
56 cairo_translate (cr, SIZE + PAD, 0.);
58 make_path (cr, theta);
59 cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
62 cairo_translate (cr, SIZE + PAD, 0.);
64 make_path (cr, theta);
65 cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER);
68 cairo_translate (cr, SIZE + PAD, 0.);
72 draw_caps_joins (cairo_t *cr, double theta)
74 cairo_translate (cr, PAD, 0);
75 cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
76 draw_joins (cr, theta);
78 cairo_translate (cr, PAD, 0);
79 cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
80 draw_joins (cr, theta);
82 cairo_translate (cr, PAD, 0);
83 cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
84 draw_joins (cr, theta);
87 static cairo_test_status_t
88 draw (cairo_t *cr, int width, int height)
90 const double theta[] = {
91 -M_PI/2, -M_PI/4, 0, M_PI/8, M_PI/3, M_PI
95 /* We draw in the default black, so paint white first. */
97 cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
101 cairo_set_line_width (cr, LINE_WIDTH);
103 for (t = 0; t < sizeof(theta)/sizeof (theta[0]); t++) {
105 cairo_translate (cr, 0, t * (SIZE + PAD) + PAD);
106 draw_caps_joins (cr, theta[t]);
110 /* and reflect to generate the opposite vertex ordering */
111 cairo_translate (cr, 0, height - t * (SIZE + PAD) - PAD);
112 cairo_scale (cr, 1, -1);
113 draw_caps_joins (cr, theta[t]);
117 return CAIRO_TEST_SUCCESS;
120 CAIRO_TEST (caps_tails_curve,
121 "Test caps and joins on short tail segments",
122 "stroke cap join", /* keywords */
123 NULL, /* requirements */
124 9 * (PAD + SIZE) + 4*PAD,
125 12 * (PAD + SIZE) + PAD,