c 2b 2b hsl to rgb integer

1typedef struct RgbColor
2{
3    unsigned char r;
4    unsigned char g;
5    unsigned char b;
6} RgbColor;
7
8typedef struct HsvColor
9{
10    unsigned char h;
11    unsigned char s;
12    unsigned char v;
13} HsvColor;
14
15RgbColor HsvToRgb(HsvColor hsv)
16{
17    RgbColor rgb;
18    unsigned char region, remainder, p, q, t;
19
20    if (hsv.s == 0)
21    {
22        rgb.r = hsv.v;
23        rgb.g = hsv.v;
24        rgb.b = hsv.v;
25        return rgb;
26    }
27
28    region = hsv.h / 43;
29    remainder = (hsv.h - (region * 43)) * 6; 
30
31    p = (hsv.v * (255 - hsv.s)) >> 8;
32    q = (hsv.v * (255 - ((hsv.s * remainder) >> 8))) >> 8;
33    t = (hsv.v * (255 - ((hsv.s * (255 - remainder)) >> 8))) >> 8;
34
35    switch (region)
36    {
37        case 0:
38            rgb.r = hsv.v; rgb.g = t; rgb.b = p;
39            break;
40        case 1:
41            rgb.r = q; rgb.g = hsv.v; rgb.b = p;
42            break;
43        case 2:
44            rgb.r = p; rgb.g = hsv.v; rgb.b = t;
45            break;
46        case 3:
47            rgb.r = p; rgb.g = q; rgb.b = hsv.v;
48            break;
49        case 4:
50            rgb.r = t; rgb.g = p; rgb.b = hsv.v;
51            break;
52        default:
53            rgb.r = hsv.v; rgb.g = p; rgb.b = q;
54            break;
55    }
56
57    return rgb;
58}
59
60HsvColor RgbToHsv(RgbColor rgb)
61{
62    HsvColor hsv;
63    unsigned char rgbMin, rgbMax;
64
65    rgbMin = rgb.r < rgb.g ? (rgb.r < rgb.b ? rgb.r : rgb.b) : (rgb.g < rgb.b ? rgb.g : rgb.b);
66    rgbMax = rgb.r > rgb.g ? (rgb.r > rgb.b ? rgb.r : rgb.b) : (rgb.g > rgb.b ? rgb.g : rgb.b);
67
68    hsv.v = rgbMax;
69    if (hsv.v == 0)
70    {
71        hsv.h = 0;
72        hsv.s = 0;
73        return hsv;
74    }
75
76    hsv.s = 255 * long(rgbMax - rgbMin) / hsv.v;
77    if (hsv.s == 0)
78    {
79        hsv.h = 0;
80        return hsv;
81    }
82
83    if (rgbMax == rgb.r)
84        hsv.h = 0 + 43 * (rgb.g - rgb.b) / (rgbMax - rgbMin);
85    else if (rgbMax == rgb.g)
86        hsv.h = 85 + 43 * (rgb.b - rgb.r) / (rgbMax - rgbMin);
87    else
88        hsv.h = 171 + 43 * (rgb.r - rgb.g) / (rgbMax - rgbMin);
89
90    return hsv;
91}
92