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ff2pam.c - farbfeld - suckless image format with conversion tools
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ff2pam.c (1050B)
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1 /* See LICENSE file for copyright and license details. */
2 #include <arpa/inet.h>
3
4 #include <errno.h>
5 #include <inttypes.h>
6 #include <stdint.h>
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include <string.h>
10 #include <unistd.h>
11
12 #include "util.h"
13
14 static void
15 usage(void)
16 {
17 die("usage: %s", argv0);
18 }
19
20 int
21 main(int argc, char *argv[])
22 {
23 size_t rowlen;
24 uint32_t width, height, i;
25 uint16_t *row;
26
27 /* arguments */
28 argv0 = argv[0], argc--, argv++;
29
30 if (argc) {
31 usage();
32 }
33
34 /* prepare */
35 ff_read_header(&width, &height);
36 row = ereallocarray(NULL, width, (sizeof("RGBA") - 1) * sizeof(u…
37 rowlen = width * (sizeof("RGBA") - 1);
38
39 /* write data */
40 printf("P7\n"
41 "WIDTH %" PRIu32 "\n"
42 "HEIGHT %" PRIu32 "\n"
43 "DEPTH 4\n" /* number of channels */
44 "MAXVAL 65535\n"
45 "TUPLTYPE RGB_ALPHA\n"
46 "ENDHDR\n",
47 width, height);
48
49 for (i = 0; i < height; i++) {
50 efread(row, sizeof(uint16_t), rowlen, stdin);
51 efwrite(row, sizeof(uint16_t), rowlen, stdout);
52 }
53
54 return fshut(stdout, "<stdout>");
55 }
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