1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
/*
* Copyright 2009 Andrea Canciani
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Author: Andrea Canciani <ranma42@gmail.com>
*/
#include "cairo-test.h"
#define N_OPERATORS (CAIRO_OPERATOR_SATURATE + 1)
#define HEIGHT 16
#define WIDTH 16
#define PAD 3
static cairo_pattern_t*
_create_pattern (cairo_surface_t *target, cairo_content_t content, int width, int height)
{
cairo_pattern_t *pattern;
cairo_surface_t *surface;
cairo_t *cr;
surface = cairo_surface_create_similar (target, content, width, height);
cr = cairo_create (surface);
cairo_surface_destroy (surface);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_arc (cr, 0.5 * width, 0.5 * height, 0.45 * height, -M_PI / 4, 3 * M_PI / 4);
cairo_fill (cr);
pattern = cairo_pattern_create_for_surface (cairo_get_target (cr));
cairo_destroy (cr);
return pattern;
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_pattern_t *alpha_pattern, *color_alpha_pattern, *pattern;
unsigned int n, i;
alpha_pattern = _create_pattern (cairo_get_target (cr),
CAIRO_CONTENT_ALPHA,
0.9 * WIDTH, 0.9 * HEIGHT);
color_alpha_pattern = _create_pattern (cairo_get_target (cr),
CAIRO_CONTENT_COLOR_ALPHA,
0.9 * WIDTH, 0.9 * HEIGHT);
pattern = cairo_pattern_create_linear (WIDTH, 0, 0, HEIGHT);
cairo_pattern_add_color_stop_rgba (pattern, 0.2, 0, 0, 1, 1);
cairo_pattern_add_color_stop_rgba (pattern, 0.8, 0, 0, 1, 0);
cairo_translate (cr, PAD, PAD);
for (n = 0; n < N_OPERATORS; n++) {
cairo_save (cr);
for (i = 0; i < 4; i++) {
cairo_reset_clip (cr);
cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
cairo_clip (cr);
cairo_set_source (cr, pattern);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
if (i & 2) {
cairo_paint (cr);
} else {
cairo_rectangle (cr, WIDTH/2, HEIGHT/2, WIDTH, HEIGHT);
cairo_fill (cr);
}
cairo_set_source (cr, i & 1 ? alpha_pattern : color_alpha_pattern);
cairo_set_operator (cr, n);
if (i & 2) {
cairo_paint (cr);
} else {
cairo_rectangle (cr, WIDTH/2, HEIGHT/2, WIDTH, HEIGHT);
cairo_fill (cr);
}
cairo_translate (cr, 0, HEIGHT+PAD);
}
cairo_restore (cr);
cairo_translate (cr, WIDTH+PAD, 0);
}
cairo_pattern_destroy (pattern);
cairo_pattern_destroy (alpha_pattern);
cairo_pattern_destroy (color_alpha_pattern);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (surface_pattern_operator,
"Tests alpha-only and alpha-color sources with all operators",
"surface, pattern, operator", /* keywords */
NULL, /* requirements */
(WIDTH+PAD) * N_OPERATORS + PAD, 4*HEIGHT + 5*PAD,
NULL, draw)
|
