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/* See LICENSE file for copyright and license details. */
#ifndef TYPE
#include "common.h"
USAGE("colour-file")
#define FILE "blind-extract-alpha.c"
#include "define-functions.h"
int
main(int argc, char *argv[])
{
struct stream stream;
int fd;
void (*process)(struct stream *stream, int fd, const char *fname);
UNOFLAGS(argc != 1);
eopen_stream(&stream, NULL);
fd = eopen(argv[0], O_WRONLY | O_CREAT | O_TRUNC, 0666);
SELECT_PROCESS_FUNCTION(&stream);
CHECK_CHANS(&stream, != -1, == stream.luma_chan);
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
if (dprint_stream_head(fd, &stream) < 0)
eprintf("dprintf %s:", argv[0]);
process(&stream, fd, argv[0]);
return 0;
}
#else
static void
PROCESS(struct stream *stream, int fd, const char *fname)
{
char buf[sizeof(stream->buf)];
size_t i, j, n;
TYPE a, *p, *b;
do {
n = stream->ptr / stream->pixel_size;
p = (TYPE *)(stream->buf) + stream->luma_chan;
b = (TYPE *)buf;
for (i = 0; i < n; i++, p += stream->n_chan) {
a = *p, *p = 1;
for (j = stream->n_chan - 1; j--;)
*b++ = a;
*b++ = 1;
}
n *= stream->pixel_size;
ewriteall(fd, stream->buf, n, fname);
ewriteall(STDOUT_FILENO, buf, n, "<stdout>");
memmove(stream->buf, stream->buf + n, stream->ptr -= n);
} while (eread_stream(stream, SIZE_MAX));
if (stream->ptr)
eprintf("%s: incomplete frame\n", stream->file);
}
#endif
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