2 * Copyright © 2009 Adrian Johnson
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: Adrian Johnson <ajohnson@redneon.com>
27 #include "cairo-test.h"
32 /* This test is designed to test the accuracy of the rendering of mesh
35 * Color accuracy is tested by a square patch covering the whole
36 * surface with black and white corners.
38 * Extents accuracy is checked by a small red square patch at the
39 * center of the surface which should measure 2x2 pixels.
42 static cairo_test_status_t
43 draw (cairo_t *cr, int width, int height)
45 cairo_pattern_t *pattern;
48 cairo_test_paint_checkered (cr);
50 pattern = cairo_pattern_create_mesh ();
52 cairo_mesh_pattern_begin_patch (pattern);
54 cairo_mesh_pattern_move_to (pattern, 0, 0);
55 cairo_mesh_pattern_line_to (pattern, 1, 0);
56 cairo_mesh_pattern_line_to (pattern, 1, 1);
57 cairo_mesh_pattern_line_to (pattern, 0, 1);
59 cairo_mesh_pattern_set_corner_color_rgb (pattern, 0, 0, 0, 0);
60 cairo_mesh_pattern_set_corner_color_rgb (pattern, 1, 1, 1, 1);
61 cairo_mesh_pattern_set_corner_color_rgb (pattern, 2, 0, 0, 0);
62 cairo_mesh_pattern_set_corner_color_rgb (pattern, 3, 1, 1, 1);
64 cairo_mesh_pattern_end_patch (pattern);
66 cairo_mesh_pattern_begin_patch (pattern);
68 /* A small 1x1 red patch, that should be rendered as a 2x2 red
69 * square in the center of the image */
73 cairo_mesh_pattern_move_to (pattern, 0.5 + offset, 0.5 + offset);
74 cairo_mesh_pattern_line_to (pattern, 0.5 + offset, 0.5 - offset);
75 cairo_mesh_pattern_line_to (pattern, 0.5 - offset, 0.5 - offset);
76 cairo_mesh_pattern_line_to (pattern, 0.5 - offset, 0.5 + offset);
78 cairo_mesh_pattern_set_corner_color_rgb (pattern, 0, 1, 0, 0);
79 cairo_mesh_pattern_set_corner_color_rgb (pattern, 1, 1, 0, 0);
80 cairo_mesh_pattern_set_corner_color_rgb (pattern, 2, 1, 0, 0);
81 cairo_mesh_pattern_set_corner_color_rgb (pattern, 3, 1, 0, 0);
83 cairo_mesh_pattern_end_patch (pattern);
85 cairo_scale (cr, SIZE, SIZE);
87 cairo_set_source (cr, pattern);
89 cairo_pattern_destroy (pattern);
91 return CAIRO_TEST_SUCCESS;
94 CAIRO_TEST (mesh_pattern_accuracy,
96 "mesh,pattern", /* keywords */
97 NULL, /* requirements */