GopherProxy

	blind-extract-alpha.c - blind - suckless command-line video editing utility
	git clone git://git.suckless.org/blind
	Log
	Files
	Refs
	README
	LICENSE
	---
	blind-extract-alpha.c (1400B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #ifndef TYPE
	3 #include "common.h"
	4
	5 USAGE("colour-file")
	6
	7 #define FILE "blind-extract-alpha.c"
	8 #include "define-functions.h"
	9
	10 int
	11 main(int argc, char *argv[])
	12 {
	13 struct stream stream;
	14 int fd;
	15 void (process)(struct stream stream, int fd, const char *fname…
	16
	17 UNOFLAGS(argc != 1);
	18
	19 eopen_stream(&stream, NULL);
	20 fd = eopen(argv[0], O_WRONLY \| O_CREAT \| O_TRUNC, 0666);
	21
	22 SELECT_PROCESS_FUNCTION(&stream);
	23 CHECK_CHANS(&stream, != -1, == stream.luma_chan);
	24
	25 fprint_stream_head(stdout, &stream);
	26 efflush(stdout, "<stdout>");
	27 if (dprint_stream_head(fd, &stream) < 0)
	28 eprintf("dprintf %s:", argv[0]);
	29 process(&stream, fd, argv[0]);
	30 return 0;
	31 }
	32
	33 #else
	34
	35 static void
	36 PROCESS(struct stream stream, int fd, const char fname)
	37 {
	38 char buf[sizeof(stream->buf)];
	39 size_t i, j, n;
	40 TYPE a, p, b;
	41 do {
	42 n = stream->ptr / stream->pixel_size;
	43 p = (TYPE *)(stream->buf) + stream->luma_chan;
	44 b = (TYPE *)buf;
	45 for (i = 0; i < n; i++, p += stream->n_chan) {
	46 a = p, p = 1;
	47 for (j = stream->n_chan - 1; j--;)
	48 *b++ = a;
	49 *b++ = 1;
	50 }
	51 n *= stream->pixel_size;
	52 ewriteall(fd, stream->buf, n, fname);
	53 ewriteall(STDOUT_FILENO, buf, n, "<stdout>");
	54 memmove(stream->buf, stream->buf + n, stream->ptr -= n);
	55 } while (eread_stream(stream, SIZE_MAX));
	56 if (stream->ptr)
	57 eprintf("%s: incomplete frame\n", stream->file);
	58 }
	59
	60 #endif