-
Notifications
You must be signed in to change notification settings - Fork 120
/
example.c
36 lines (33 loc) · 989 Bytes
/
example.c
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
#include "svpng.inc"
void test_rgb(void) {
unsigned char rgb[256 * 256 * 3], *p = rgb;
unsigned x, y;
FILE *fp = fopen("rgb.png", "wb");
for (y = 0; y < 256; y++)
for (x = 0; x < 256; x++) {
*p++ = (unsigned char)x; /* R */
*p++ = (unsigned char)y; /* G */
*p++ = 128; /* B */
}
svpng(fp, 256, 256, rgb, 0);
fclose(fp);
}
void test_rgba(void) {
unsigned char rgba[256 * 256 * 4], *p = rgba;
unsigned x, y;
FILE* fp = fopen("rgba.png", "wb");
for (y = 0; y < 256; y++)
for (x = 0; x < 256; x++) {
*p++ = (unsigned char)x; /* R */
*p++ = (unsigned char)y; /* G */
*p++ = 128; /* B */
*p++ = (unsigned char)((x + y) / 2); /* A */
}
svpng(fp, 256, 256, rgba, 1);
fclose(fp);
}
int main(void) {
test_rgb();
test_rgba();
return 0;
}