1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/* See LICENSE file for copyright and license details. */
#ifndef TYPE
#include "common.h"
USAGE("[-es]")
static int equal = 0;
static int spiral = 0;
#define FILE "blind-triangular-wave.c"
#include "define-functions.h"
int
main(int argc, char *argv[])
{
struct stream stream;
void (*process)(struct stream *stream);
ARGBEGIN {
case 'e':
equal = 1;
break;
case 's':
spiral = 1;
break;
default:
usage();
} ARGEND;
if (argc)
usage();
eopen_stream(&stream, NULL);
if (stream.encoding == DOUBLE)
process = process_lf;
else if (stream.encoding == FLOAT)
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;
}
#else
static void
PROCESS(struct stream *stream)
{
size_t i, j, n;
TYPE v, *p;
do {
if (equal) {
n = stream->ptr / stream->pixel_size;
for (i = 0; i < n; i++) {
p = (TYPE *)(stream->buf) + i * stream->n_chan;
v = posmod(*p, (TYPE)2);
v = v > 1 ? 2 - v : v;
if (spiral)
v = (v > (TYPE)0.5 ? 1 - v : v) * 2;
for (j = 0; j < stream->n_chan; j++)
p[j] = v;
}
n *= stream->pixel_size;
} else {
n = stream->ptr / stream->chan_size;
for (i = 0; i < n; i++) {
p = (TYPE *)(stream->buf) + i;
v = posmod(*p, (TYPE)2);
v = v > 1 ? 2 - v : v;
if (spiral)
v = (v > (TYPE)0.5 ? 1 - v : v) * 2;
*p = v;
}
n *= stream->chan_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
|
