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/* See LICENSE file for copyright and license details. */
#include "common.h"
USAGE("[-c]")
static int per_channel = 0;
#define PROCESS(TYPE)\
do {\
typedef TYPE pixel_t[4];\
pixel_t matrix[9];\
pixel_t buf;\
int i;\
\
for (i = 0; i < 4; i++) {\
matrix[0][i] = 1, matrix[1][i] = 0, matrix[2][i] = 0;\
matrix[3][i] = 0, matrix[4][i] = 1, matrix[5][i] = 0;\
matrix[6][i] = 0, matrix[7][i] = 0, matrix[8][i] = 1;\
}\
\
while (eread_frame(stream, buf)) {\
if (per_channel) {\
for (i = 0; i < 4; i++) {\
matrix[3][i] = matrix[1][i] = buf[i];\
matrix[4][i] = matrix[0][i] = 1 - buf[i];\
}\
} else {\
for (i = 0; i < 4; i++) {\
matrix[3][i] = matrix[1][i] = buf[1] * buf[3];\
matrix[4][i] = matrix[0][i] = 1 - matrix[3][i];\
}\
}\
ewriteall(STDOUT_FILENO, matrix, sizeof(matrix), "<stdout>");\
}\
} while (0)
static void process_lf(struct stream *stream) { PROCESS(double); }
static void process_f(struct stream *stream) { PROCESS(float); }
int
main(int argc, char *argv[])
{
struct stream stream;
void (*process)(struct stream *stream);
ARGBEGIN {
case 'c':
per_channel = 1;
break;
default:
usage();
} ARGEND;
if (argc)
usage();
eopen_stream(&stream, NULL);
if (stream.width != 1 || stream.height != 1)
eprintf("<stdin>: each frame must contain exactly 1 pixels\n");
stream.width = 3;
stream.height = 3;
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
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);
process(&stream);
return 0;
}
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