2 * Copyright © 2006 M Joonas Pihlaja
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: M Joonas Pihlaja <jpihlaja@cc.helsinki.fi>
29 * 2006-12-05 M Joonas Pihlaja <jpihlaja@cc.helsinki.fi>
31 * The tessellator has a regression where a trapezoid may continue
32 * below the end of a polygon edge (i.e. the bottom of the trapezoid
33 * is miscomputed.) This can only happen if the right edge of a
34 * trapezoid stops earlier than the left edge and there is no start
35 * event at the end point of the right edge.
38 #include "cairo-test.h"
42 static cairo_test_status_t
43 draw (cairo_t *cr, int width, int height)
45 cairo_set_source_rgb (cr, 1, 0, 0);
47 cairo_translate (cr, 1, 1);
49 /* What it should look like, with # marking the filled areas:
57 * What it looke like with the bug, when the rightmost edge's end
67 cairo_move_to (cr, 0, 0);
68 cairo_line_to (cr, SIZE/2, SIZE);
69 cairo_line_to (cr, SIZE/2, 0);
70 cairo_line_to (cr, SIZE, SIZE/2);
71 cairo_line_to (cr, 0, SIZE/2);
72 cairo_close_path (cr);
75 return CAIRO_TEST_SUCCESS;
78 CAIRO_TEST (fill_missed_stop,
79 "Tests that the tessellator doesn't miss stop events when generating trapezoids",
80 "fill", /* keywords */
81 NULL, /* requirements */