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
|
#include <stdio.h>
#include <stdlib.h>
#include "pixman.h"
#include "gtk-utils.h"
int
main (int argc, char **argv)
{
#define WIDTH 200
#define HEIGHT 200
#define d2f pixman_double_to_fixed
uint32_t *src = malloc (WIDTH * HEIGHT * 4);
uint32_t *mask = malloc (WIDTH * HEIGHT * 4);
uint32_t *dest = malloc (WIDTH * HEIGHT * 4);
pixman_fixed_t convolution[] =
{
d2f (3), d2f (3),
d2f (0.5), d2f (0.5), d2f (0.5),
d2f (0.5), d2f (0.5), d2f (0.5),
d2f (0.5), d2f (0.5), d2f (0.5),
};
pixman_image_t *simg, *mimg, *dimg;
int i;
for (i = 0; i < WIDTH * HEIGHT; ++i)
{
src[i] = 0x7f007f00;
mask[i] = (i % 256) * 0x01000000;
dest[i] = 0;
}
simg = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, src, WIDTH * 4);
mimg = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, mask, WIDTH * 4);
dimg = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, dest, WIDTH * 4);
pixman_image_set_filter (mimg, PIXMAN_FILTER_CONVOLUTION,
convolution, 11);
pixman_image_composite (PIXMAN_OP_OVER, simg, mimg, dimg, 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
show_image (dimg);
return 0;
}
|
