2 * Copyright © 2008 Red Hat, Inc.
3 * Copyright © 2010 Intel Corporation
5 * Permission is hereby granted, free of charge, to any person
6 * obtaining a copy of this software and associated documentation
7 * files (the "Software"), to deal in the Software without
8 * restriction, including without limitation the rights to use, copy,
9 * modify, merge, publish, distribute, sublicense, and/or sell copies
10 * of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 * Author: Carl D. Worth <cworth@cworth.org>
26 * Chris Wilson <chris@chris-wilson.co.uk>
29 #include "cairo-test.h"
32 #define STEP (1.0 / POINTS)
34 #define WIDTH (PAD + POINTS * 2 + PAD)
35 #define HEIGHT (WIDTH)
37 /* A single, opaque pixel */
38 static const uint32_t black_pixel = 0xffffffff;
40 static cairo_test_status_t
41 draw (cairo_t *cr, int width, int height)
43 cairo_surface_t *surface;
44 cairo_pattern_t *mask;
47 surface = cairo_image_surface_create_for_data ((unsigned char *) &black_pixel,
50 mask = cairo_pattern_create_for_surface (surface);
51 cairo_pattern_set_filter (mask, CAIRO_FILTER_NEAREST);
52 cairo_surface_destroy (surface);
54 /* Fill background white */
55 cairo_set_source_rgb (cr, 1, 1, 1);
58 cairo_translate (cr, PAD, PAD);
60 cairo_set_source_rgb (cr, 0, 0, 0);
61 for (i = 0; i < POINTS; i++) {
62 for (j = 0; j < POINTS; j++) {
65 cairo_matrix_init_translate (&m,
68 cairo_pattern_set_matrix (mask, &m);
69 cairo_mask (cr, mask);
73 cairo_pattern_destroy (mask);
75 return CAIRO_TEST_SUCCESS;
78 CAIRO_TEST (a1_mask_sample,
79 "Test sample position when masking with FILTER_NEAREST",
80 "image, alpha", /* keywords */
81 "target=raster", /* requirements */