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
|
/* See LICENSE file for copyright and license details. */
#ifndef TYPE
#include "common.h"
USAGE("[-m] X Y Z dual-X dual-Y dual-Z dual-stream")
static double X1, Y1, Z1, X2, Y2, Z2;
#define FILE "blind-dual-key.c"
#include "define-functions.h"
int
main(int argc, char *argv[])
{
struct stream stream, dual;
void (*process)(struct stream *stream, struct stream *dual, size_t n);
UNOFLAGS(argc != 7);
X1 = etolf_arg("the X value", argv[0]);
Y1 = etolf_arg("the Y value", argv[1]);
Z1 = etolf_arg("the Z value", argv[2]);
X2 = etolf_arg("the dual-X value", argv[3]);
Y2 = etolf_arg("the dual-Y value", argv[4]);
Z2 = etolf_arg("the dual-Z value", argv[5]);
eopen_stream(&stream, NULL);
eopen_stream(&dual, argv[6]);
SELECT_PROCESS_FUNCTION(&stream);
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
process_two_streams(&stream, &dual, STDOUT_FILENO, "<stdout>", process);
return 0;
}
#else
static void
PROCESS(struct stream *stream, struct stream *dual, size_t n)
{
size_t i;
TYPE x1k = (TYPE)X1, y1k = (TYPE)Y1, z1k = (TYPE)Z1;
TYPE x2k = (TYPE)X2, y2k = (TYPE)Y2, z2k = (TYPE)Z2;
TYPE x1, y1, z1, a1, x2, y2, z2, a2;
TYPE alpha, xalpha, yalpha, zalpha;
for (i = 0; i < n; i += stream->pixel_size) {
x1 = ((TYPE *)(stream->buf + i))[0];
y1 = ((TYPE *)(stream->buf + i))[1];
z1 = ((TYPE *)(stream->buf + i))[2];
a1 = ((TYPE *)(stream->buf + i))[3];
x2 = ((TYPE *)(dual->buf + i))[0];
y2 = ((TYPE *)(dual->buf + i))[1];
z2 = ((TYPE *)(dual->buf + i))[2];
a2 = ((TYPE *)(dual->buf + i))[3];
if (x1 == x2 && y1 == y2 && z1 == z2) {
if (a1 != a2)
((TYPE *)(stream->buf + i))[3] = (a1 + a2) / 2;
continue;
}
xalpha = x1 == x2 ? (TYPE)0 : (x2 - x1 + x1k - x2k) / (x1k - x2k);
yalpha = y1 == y2 ? (TYPE)0 : (y2 - y1 + y1k - y2k) / (y1k - y2k);
zalpha = z1 == z2 ? (TYPE)0 : (z2 - z1 + z1k - z2k) / (z1k - z2k);
alpha = xalpha > yalpha ? xalpha : yalpha;
alpha = alpha > zalpha ? alpha : zalpha;
if (!alpha) {
((TYPE *)(stream->buf + i))[0] = (TYPE)0;
((TYPE *)(stream->buf + i))[1] = (TYPE)0;
((TYPE *)(stream->buf + i))[2] = (TYPE)0;
((TYPE *)(stream->buf + i))[3] = (TYPE)0;
} else {
((TYPE *)(stream->buf + i))[0] = ((x1 - x1k + x2 - x2k) / alpha + x1k + x2k) / 2;
((TYPE *)(stream->buf + i))[1] = ((y1 - y1k + y2 - y2k) / alpha + y1k + y2k) / 2;
((TYPE *)(stream->buf + i))[2] = ((z1 - z1k + z2 - z2k) / alpha + z1k + z2k) / 2;
((TYPE *)(stream->buf + i))[3] = (a1 + a2) / 2 * alpha;
}
}
}
#endif
|
