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/* See LICENSE file for copyright and license details. */
#include "common.h"
USAGE("[-e]")
static int equal = 0;
#define PROCESS(TYPE, SUFFIX)\
static void\
process_##SUFFIX(struct stream *stream)\
{\
size_t i, n;\
TYPE x, y, z, a;\
do {\
n = stream->ptr / stream->pixel_size;\
if (equal) {\
for (i = 0; i < n; i++) {\
a = ((TYPE *)(stream->buf))[4 * i + 3];\
a = posmod(a, (TYPE)2);\
a = a > 1 ? 2 - a : a;\
a = 1 - (sin(a * (2 * (TYPE)M_PI)) + 1) / 2;\
((TYPE *)(stream->buf))[4 * i + 0] = a;\
((TYPE *)(stream->buf))[4 * i + 1] = a;\
((TYPE *)(stream->buf))[4 * i + 2] = a;\
((TYPE *)(stream->buf))[4 * i + 3] = a;\
}\
} else {\
for (i = 0; i < n; i++) {\
x = ((TYPE *)(stream->buf))[4 * i + 0];\
y = ((TYPE *)(stream->buf))[4 * i + 1];\
z = ((TYPE *)(stream->buf))[4 * i + 2];\
a = ((TYPE *)(stream->buf))[4 * i + 3];\
x = posmod(x, (TYPE)1);\
y = posmod(y, (TYPE)1);\
z = posmod(z, (TYPE)1);\
a = posmod(a, (TYPE)1);\
x = x > 1 ? 2 - x : x;\
y = y > 1 ? 2 - y : y;\
z = z > 1 ? 2 - z : z;\
a = a > 1 ? 2 - a : a;\
x = 1 - (sin(x * (2 * (TYPE)M_PI)) + 1) / 2;\
y = 1 - (sin(y * (2 * (TYPE)M_PI)) + 1) / 2;\
z = 1 - (sin(z * (2 * (TYPE)M_PI)) + 1) / 2;\
a = 1 - (sin(a * (2 * (TYPE)M_PI)) + 1) / 2;\
((TYPE *)(stream->buf))[4 * i + 0] = x;\
((TYPE *)(stream->buf))[4 * i + 1] = y;\
((TYPE *)(stream->buf))[4 * i + 2] = z;\
((TYPE *)(stream->buf))[4 * i + 3] = 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 'e':
equal = 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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