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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 = mod(a + 1, (TYPE)4) - 1;\
a = a < 1 ? 1 - a * a / 2 : (a - 2) * (a - 2) / 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 = mod(x + 1, (TYPE)4) - 1;\
y = mod(y + 1, (TYPE)4) - 1;\
z = mod(z + 1, (TYPE)4) - 1;\
a = mod(a + 1, (TYPE)4) - 1;\
x = x < 1 ? 1 - x * x / 2 : (x - 2) * (x - 2) / 2;\
y = y < 1 ? 1 - y * y / 2 : (y - 2) * (y - 2) / 2;\
z = z < 1 ? 1 - z * z / 2 : (z - 2) * (z - 2) / 2;\
a = a < 1 ? 1 - a * a / 2 : (a - 2) * (a - 2) / 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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