1 #include <assert.h>
2 #include <stdlib.h>
3 #include <stdio.h>
4 #include "utils.h"
5
6 int
main()7 main ()
8 {
9 pixman_region32_t r1;
10 pixman_region32_t r2;
11 pixman_region32_t r3;
12 pixman_box32_t boxes[] = {
13 { 10, 10, 20, 20 },
14 { 30, 30, 30, 40 },
15 { 50, 45, 60, 44 },
16 };
17 pixman_box32_t boxes2[] = {
18 { 2, 6, 7, 6 },
19 { 4, 1, 6, 7 },
20 };
21 pixman_box32_t boxes3[] = {
22 { 2, 6, 7, 6 },
23 { 4, 1, 6, 1 },
24 };
25 int i, j;
26 pixman_box32_t *b;
27 pixman_image_t *image, *fill;
28 pixman_color_t white = {
29 0xffff,
30 0xffff,
31 0xffff,
32 0xffff
33 };
34
35 prng_srand (0);
36
37 /* This used to go into an infinite loop before pixman-region.c
38 * was fixed to not use explict "short" variables
39 */
40 pixman_region32_init_rect (&r1, 0, 0, 20, 64000);
41 pixman_region32_init_rect (&r2, 0, 0, 20, 64000);
42 pixman_region32_init_rect (&r3, 0, 0, 20, 64000);
43
44 pixman_region32_subtract (&r1, &r2, &r3);
45
46
47 /* This would produce a region containing an empty
48 * rectangle in it. Such regions are considered malformed,
49 * but using an empty rectangle for initialization should
50 * work.
51 */
52 pixman_region32_init_rects (&r1, boxes, 3);
53
54 b = pixman_region32_rectangles (&r1, &i);
55
56 assert (i == 1);
57
58 while (i--)
59 {
60 assert (b[i].x1 < b[i].x2);
61 assert (b[i].y1 < b[i].y2);
62 }
63
64 /* This would produce a rectangle containing the bounding box
65 * of the two rectangles. The correct result is to eliminate
66 * the broken rectangle.
67 */
68 pixman_region32_init_rects (&r1, boxes2, 2);
69
70 b = pixman_region32_rectangles (&r1, &i);
71
72 assert (i == 1);
73
74 assert (b[0].x1 == 4);
75 assert (b[0].y1 == 1);
76 assert (b[0].x2 == 6);
77 assert (b[0].y2 == 7);
78
79 /* This should produce an empty region */
80 pixman_region32_init_rects (&r1, boxes3, 2);
81
82 b = pixman_region32_rectangles (&r1, &i);
83
84 assert (i == 0);
85
86 fill = pixman_image_create_solid_fill (&white);
87 for (i = 0; i < 100; i++)
88 {
89 int image_size = 128;
90
91 pixman_region32_init (&r1);
92
93 /* Add some random rectangles */
94 for (j = 0; j < 64; j++)
95 pixman_region32_union_rect (&r1, &r1,
96 prng_rand_n (image_size),
97 prng_rand_n (image_size),
98 prng_rand_n (25),
99 prng_rand_n (25));
100
101 /* Clip to image size */
102 pixman_region32_init_rect (&r2, 0, 0, image_size, image_size);
103 pixman_region32_intersect (&r1, &r1, &r2);
104 pixman_region32_fini (&r2);
105
106 /* render region to a1 mask */
107 image = pixman_image_create_bits (PIXMAN_a1, image_size, image_size, NULL, 0);
108 pixman_image_set_clip_region32 (image, &r1);
109 pixman_image_composite32 (PIXMAN_OP_SRC,
110 fill, NULL, image,
111 0, 0, 0, 0, 0, 0,
112 image_size, image_size);
113 pixman_region32_init_from_image (&r2, image);
114
115 pixman_image_unref (image);
116
117 assert (pixman_region32_equal (&r1, &r2));
118 pixman_region32_fini (&r1);
119 pixman_region32_fini (&r2);
120
121 }
122 pixman_image_unref (fill);
123
124 return 0;
125 }
126