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diff --git a/keyboards/handwired/practice60/hsv2rgb.c b/keyboards/handwired/practice60/hsv2rgb.c
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1/* hsv2rgb.c
2 * Integer only conversion functions between HSV and RGB
3 */
4
5#include "hsv2rgb.h"
6
7// TODO fix these buggy macros
8#define max(x,y) ((x>y) ? x:y)
9#define min(x,y) ((x>y) ? y:x)
10#define min3(x,y,z) (min(min(x,y),z))
11#define max3(x,y,z) (max(max(x,y),z))
12
13
14rgb_color hsv2rgb(hsv_color hsv)
15{
16 // From : http://qscribble.blogspot.fr/2008/06/integer-conversion-from-hsl-to-rgb.html
17 int h = hsv.h;
18 int s = hsv.s;
19 int v = hsv.v;
20 rgb_color rgb = {0, 0, 0};
21
22 if (v == 0)
23 return rgb;
24
25 // sextant = 0 .. 5
26 int sextant = (h*6)/256;
27 // f = 0 .. 42
28 int f = h - (sextant*256)/6;
29
30 int p = (v * (256 - s))/256;
31 int q = (v * (256*43 - s*f))/(256*43);
32 int t = (v * (256*43 - s*(43-f)))/(256*43);
33
34 // Corrige les erreurs dues aux arrondis
35 p = max(min(p, 255), 0);
36 q = max(min(q, 255), 0);
37 t = max(min(t, 255), 0);
38
39 switch(sextant){
40 case 0: rgb.r = v; rgb.g = t; rgb.b = p; break;
41 case 1: rgb.r = q; rgb.g = v; rgb.b = p; break;
42 case 2: rgb.r = p; rgb.g = v; rgb.b = t; break;
43 case 3: rgb.r = p; rgb.g = q; rgb.b = v; break;
44 case 4: rgb.r = t; rgb.g = p; rgb.b = v; break;
45 default:rgb.r = v; rgb.g = p; rgb.b = q; break;
46 }
47 return rgb;
48}
49
50
51hsv_color rgb2hsv(rgb_color rgb)
52{
53 // From : http://www.ruinelli.ch/rgb-to-hsv
54 hsv_color hsv = {0, 0, 0};
55 int min, max, delta;
56
57 min = min3(rgb.r, rgb.g, rgb.b);
58 max = max3(rgb.r, rgb.g, rgb.b);
59
60 if(max==0) {
61 hsv.h = 0;
62 hsv.s = 0;
63 hsv.v = 0;
64 return hsv;
65 }
66
67 hsv.v = max;
68 delta = max - min;
69
70 hsv.s = (delta)*255 / max;
71
72 if(rgb.r == max)
73 hsv.h = (rgb.g - rgb.b)*42/delta; // between yellow & magenta
74 else if(rgb.g == max)
75 hsv.h = 120 + (rgb.b - rgb.r)*42/delta; // between cyan & yellow
76 else
77 hsv.h = 240 + (rgb.r - rgb.g)*42/delta; // between magenta & cyan
78
79 return hsv;
80} \ No newline at end of file