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/* See LICENSE file for copyright and license details. */
#ifndef TYPE
#include "common.h"
USAGE("[-xyz]")
static int skip_x = 0;
static int skip_y = 0;
static int skip_z = 0;
#define FILE "blind-unpremultiply.c"
#include "define-functions.h"
int
main(int argc, char *argv[])
{
struct stream stream;
void (*process)(struct stream *stream);
ARGBEGIN {
case 'x':
skip_x = 1;
break;
case 'y':
skip_y = 1;
break;
case 'z':
skip_z = 1;
break;
default:
usage();
} ARGEND;
if (argc)
usage();
eopen_stream(&stream, NULL);
SELECT_PROCESS_FUNCTION(&stream);
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
process(&stream);
return 0;
}
#else
static void
PROCESS(struct stream *stream)
{
size_t i, n;
TYPE a;
do {
n = stream->ptr / stream->pixel_size;
for (i = 0; i < n; i++) {
a = ((TYPE *)(stream->buf))[4 * i + 3];
if (!a)
continue;
if (!skip_x)
((TYPE *)(stream->buf))[4 * i + 0] /= a;
if (!skip_y)
((TYPE *)(stream->buf))[4 * i + 1] /= a;
if (!skip_z)
((TYPE *)(stream->buf))[4 * i + 2] /= a;
}
n *= stream->pixel_size;
ewriteall(STDOUT_FILENO, stream->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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