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	ff2pam.c - farbfeld - suckless image format with conversion tools
	git clone git://git.suckless.org/farbfeld
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	ff2pam.c (1050B)
	---
	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 }