region-test.c revision 952204ab 
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    /* This used to go into an infinite loop before pixman-region.c
36     * was fixed to not use explict "short" variables
37     */
38    pixman_region32_init_rect (&r1, 0, 0, 20, 64000);
39    pixman_region32_init_rect (&r2, 0, 0, 20, 64000);
40    pixman_region32_init_rect (&r3, 0, 0, 20, 64000);
41
42    pixman_region32_subtract (&r1, &r2, &r3);
43
44
45    /* This would produce a region containing an empty
46     * rectangle in it. Such regions are considered malformed,
47     * but using an empty rectangle for initialization should
48     * work.
49     */
50    pixman_region32_init_rects (&r1, boxes, 3);
51
52    b = pixman_region32_rectangles (&r1, &i);
53
54    assert (i == 1);
55
56    while (i--)
57    {
58	assert (b[i].x1 < b[i].x2);
59	assert (b[i].y1 < b[i].y2);
60    }
61
62    /* This would produce a rectangle containing the bounding box
63     * of the two rectangles. The correct result is to eliminate
64     * the broken rectangle.
65     */
66    pixman_region32_init_rects (&r1, boxes2, 2);
67
68    b = pixman_region32_rectangles (&r1, &i);
69
70    assert (i == 1);
71
72    assert (b[0].x1 == 4);
73    assert (b[0].y1 == 1);
74    assert (b[0].x2 == 6);
75    assert (b[0].y2 == 7);
76
77    /* This should produce an empty region */
78    pixman_region32_init_rects (&r1, boxes3, 2);
79
80    b = pixman_region32_rectangles (&r1, &i);
81
82    assert (i == 0);
83
84    fill = pixman_image_create_solid_fill (&white);
85    for (i = 0; i < 100; i++)
86    {
87	int image_size = 128;
88
89	pixman_region32_init (&r1);
90
91	/* Add some random rectangles */
92	for (j = 0; j < 64; j++)
93	    pixman_region32_union_rect (&r1, &r1,
94					lcg_rand_n (image_size),
95					lcg_rand_n (image_size),
96					lcg_rand_n (25),
97					lcg_rand_n (25));
98
99	/* Clip to image size */
100	pixman_region32_init_rect (&r2, 0, 0, image_size, image_size);
101	pixman_region32_intersect (&r1, &r1, &r2);
102	pixman_region32_fini (&r2);
103
104	/* render region to a1 mask */
105	image = pixman_image_create_bits (PIXMAN_a1, image_size, image_size, NULL, 0);
106	pixman_image_set_clip_region32 (image, &r1);
107	pixman_image_composite32 (PIXMAN_OP_SRC,
108				  fill, NULL, image,
109				  0, 0, 0, 0, 0, 0,
110				  image_size, image_size);
111	pixman_region32_init_from_image (&r2, image);
112
113	pixman_image_unref (image);
114
115	assert (pixman_region32_equal (&r1, &r2));
116	pixman_region32_fini (&r1);
117	pixman_region32_fini (&r2);
118
119    }
120    pixman_image_unref (fill);
121
122    return 0;
123}
124