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
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21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * Author: Chris Wilson <chris@chris-wilson.co.uk>
27 /* Not strictly overlapping, but it does highlight the error in
28 * an optimisation of fill-box handling that I frequently am
32 #include "cairo-test.h"
40 cairo_rectangle (cr, 1, 1, 8, 8);
41 cairo_rectangle (cr, 1.25, 1.25, 7.5, 7.5);
42 cairo_rectangle (cr, 1.75, 1.75, 6.5, 6.5);
43 cairo_rectangle (cr, 2, 2, 6, 6);
46 static cairo_test_status_t
47 draw (cairo_t *cr, int width, int height)
49 cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
51 cairo_set_source_rgb (cr, 1, 1, 1);
55 cairo_set_source_rgb (cr, 1, 0, 0);
56 cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
59 cairo_translate (cr, 10, 0);
62 cairo_set_source_rgb (cr, 0, 0, 1);
63 cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
66 cairo_translate (cr, 0, 10);
68 cairo_rectangle (cr, 0, 0, 10, 10);
72 cairo_set_source_rgb (cr, 0, 1, 0);
73 cairo_set_operator (cr, CAIRO_OPERATOR_IN);
76 cairo_reset_clip (cr);
78 cairo_translate (cr, -10, 0);
80 cairo_rectangle (cr, 0, 0, 10, 10);
84 cairo_set_source_rgb (cr, 0, 0, 1);
85 cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
88 return CAIRO_TEST_SUCCESS;
91 CAIRO_TEST (overlapping_boxes,
92 "A sub-pixel double border to highlight the danger in an easy optimisation",
93 "fill", /* keywords */
94 NULL, /* requirements */