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/* See LICENSE file for copyright and license details. */
#include "common.h"
USAGE("[-xyz]")
static int skip_x = 0;
static int skip_y = 0;
static int skip_z = 0;
#define PROCESS(TYPE, SUFFIX)\
static void\
process_##SUFFIX(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);\
}
PROCESS(double, lf)
PROCESS(float, f)
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);
if (!strcmp(stream.pixfmt, "xyza"))
process = process_lf;
else if (!strcmp(stream.pixfmt, "xyza f"))
process = process_f;
else
eprintf("pixel format %s is not supported, try xyza\n", stream.pixfmt);
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
process(&stream);
return 0;
}
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