blob: d01da3aa5c42d6800bb051b9a1523da99308090d (
plain)
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
88
89
90
91
|
#ifndef color_utils_c
#define color_utils_c
#include <math.h>
struct RGB
{
unsigned char R;
unsigned char G;
unsigned char B;
};
struct HSV
{
double H;
double S;
double V;
};
struct RGB HSVToRGB(struct HSV hsv) {
double r = 0, g = 0, b = 0;
if (hsv.S == 0)
{
r = hsv.V;
g = hsv.V;
b = hsv.V;
}
else
{
int i;
double f, p, q, t;
if (hsv.H == 360)
hsv.H = 0;
else
hsv.H = hsv.H / 60;
i = (int)trunc(hsv.H);
f = hsv.H - i;
p = hsv.V * (1.0 - hsv.S);
q = hsv.V * (1.0 - (hsv.S * f));
t = hsv.V * (1.0 - (hsv.S * (1.0 - f)));
switch (i)
{
case 0:
r = hsv.V;
g = t;
b = p;
break;
case 1:
r = q;
g = hsv.V;
b = p;
break;
case 2:
r = p;
g = hsv.V;
b = t;
break;
case 3:
r = p;
g = q;
b = hsv.V;
break;
case 4:
r = t;
g = p;
b = hsv.V;
break;
default:
r = hsv.V;
g = p;
b = q;
break;
}
}
struct RGB rgb;
rgb.R = r * 255;
rgb.G = g * 255;
rgb.B = b * 255;
return rgb;
}
#endif
|
