region-test.c revision 1176bdada62cabc6ec4b0308a930e83b679d5d36 
1#include <assert.h>
2#include <stdlib.h>
3#include <stdio.h>
4#include "utils.h"
5
6int
7main ()
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