1 /*
2 * Copyright © 2011 Intel Corporation
3 *
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:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
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
22 * SOFTWARE.
23 *
24 * Author: Chris Wilson <chris@chris-wilson.co.uk>
25 */
26
27 #include "cairo-test.h"
28
29 #define STEP 5
30 #define WIDTH 100
31 #define HEIGHT 100
32
hatching(cairo_t * cr)33 static void hatching (cairo_t *cr)
34 {
35 int i;
36
37 cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
38 cairo_clip (cr);
39
40 cairo_translate (cr, WIDTH/2, HEIGHT/2);
41 cairo_rotate (cr, M_PI/4);
42 cairo_translate (cr, -WIDTH/2, -HEIGHT/2);
43
44 for (i = 0; i < WIDTH; i += STEP) {
45 cairo_rectangle (cr, i, -2, 1, HEIGHT+4);
46 cairo_rectangle (cr, -2, i, WIDTH+4, 1);
47 }
48 }
49
background(cairo_t * cr)50 static void background (cairo_t *cr)
51 {
52 cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
53 cairo_set_source_rgb (cr, 1,1,1);
54 cairo_paint (cr);
55 }
56
clip_to_grid(cairo_t * cr)57 static void clip_to_grid (cairo_t *cr)
58 {
59 int i, j;
60
61 for (j = 0; j < HEIGHT; j += 2*STEP) {
62 for (i = 0; i < WIDTH; i += 2*STEP)
63 cairo_rectangle (cr, i, j, STEP, STEP);
64
65 j += 2*STEP;
66 for (i = 0; i < WIDTH; i += 2*STEP)
67 cairo_rectangle (cr, i+STEP/2, j, STEP, STEP);
68 }
69
70 cairo_clip (cr);
71 }
72
73 static cairo_test_status_t
draw(cairo_t * cr,int width,int height)74 draw (cairo_t *cr, int width, int height)
75 {
76 background (cr);
77
78 cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
79
80 cairo_save (cr); {
81 clip_to_grid (cr);
82 hatching (cr);
83 cairo_set_source_rgb (cr, 1, 0, 0);
84 cairo_fill (cr);
85 } cairo_restore (cr);
86
87 cairo_translate (cr, 0.25, HEIGHT+.25);
88
89 cairo_save (cr); {
90 clip_to_grid (cr);
91 hatching (cr);
92 cairo_set_source_rgb (cr, 0, 0, 1);
93 cairo_fill (cr);
94 } cairo_restore (cr);
95
96 return CAIRO_TEST_SUCCESS;
97 }
98
99 CAIRO_TEST (clip_disjoint_hatching,
100 "Test drawing through through an array of clips",
101 "clip", /* keywords */
102 "target=raster", /* requirements */
103 WIDTH, 2*HEIGHT,
104 NULL, draw)
105