Commit | Line | Data |
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242486dc TW |
1 | package kaka.cakelight; |
2 | ||
3 | public class Color { | |
a4fb845a TW |
4 | public static final Color BLACK = Color.rgb(0, 0, 0); |
5 | ||
38c759f8 TW |
6 | private static int[] gammaCorrection = new int[256]; |
7 | ||
8 | public static void calculateGammaCorrection(double gamma) { | |
9 | for (int i = 0, max = 255; i <= max; i++) { | |
10 | gammaCorrection[i] = (int)(Math.pow((double)i / max, gamma) * max); | |
11 | } | |
12 | } | |
13 | ||
242486dc TW |
14 | private int r, g, b; |
15 | ||
8aea44b5 TW |
16 | public static Color rgb(double r, double g, double b) { |
17 | return rgb((int)(255 * r), (int)(255 * g), (int)(255 * b)); | |
18 | } | |
19 | ||
242486dc TW |
20 | public static Color rgb(int r, int g, int b) { |
21 | Color c = new Color(); | |
22 | c.r = r; | |
23 | c.g = g; | |
24 | c.b = b; | |
25 | return c; | |
26 | } | |
27 | ||
b3e10312 TW |
28 | /** |
29 | * @param hue 0.0 - 1.0 | |
30 | * @param saturation 0.0 - 1.0 | |
31 | * @param value 0.0 - 1.0 | |
32 | */ | |
65af4342 TW |
33 | public static Color hsv(double hue, double saturation, double value) { |
34 | double normalizedHue = hue - Math.floor(hue); | |
35 | int h = (int)(normalizedHue * 6); | |
36 | double f = normalizedHue * 6 - h; | |
37 | double p = value * (1 - saturation); | |
38 | double q = value * (1 - f * saturation); | |
39 | double t = value * (1 - (1 - f) * saturation); | |
40 | ||
41 | switch (h) { | |
42 | case 0: return rgb(value, t, p); | |
43 | case 1: return rgb(q, value, p); | |
44 | case 2: return rgb(p, value, t); | |
45 | case 3: return rgb(p, q, value); | |
46 | case 4: return rgb(t, p, value); | |
47 | case 5: return rgb(value, p, q); | |
48 | default: throw new RuntimeException("Something went wrong when converting from HSV to RGB. Input was " + hue + ", " + saturation + ", " + value); | |
49 | } | |
50 | } | |
51 | ||
b3e10312 TW |
52 | public double[] toHSV() { |
53 | return toHSV(r / 255.0, g / 255.0, b / 255.0); | |
54 | } | |
55 | ||
56 | /** | |
57 | * @return an array with hsv values ranging from 0.0 to 1.0 | |
58 | */ | |
59 | public static double[] toHSV(double r, double g, double b) { | |
60 | double h, s, v; | |
61 | double min = Math.min(Math.min(r, g), b); | |
62 | double max = Math.max(Math.max(r, g), b); | |
63 | ||
64 | if (max == 0) { | |
65 | return new double[] {0, 0, 0}; | |
66 | } | |
67 | ||
68 | // Value | |
69 | v = max; | |
70 | ||
71 | // Saturation | |
72 | double delta = max - min; | |
73 | s = delta / max; | |
74 | ||
75 | // Hue | |
76 | if (r == max) { | |
77 | h = (g - b) / delta; // between yellow & magenta | |
78 | } else if (g == max) { | |
79 | h = 2 + (b - r) / delta; // between cyan & yellow | |
80 | } else { | |
81 | h = 4 + (r - g) / delta; // between magenta & cyan | |
82 | } | |
83 | ||
84 | h /= 6.0; | |
85 | if (h < 0) | |
86 | h += 1; | |
87 | ||
88 | return new double[] {h, s, v}; | |
89 | } | |
90 | ||
242486dc | 91 | public int r() { |
38c759f8 | 92 | return gammaCorrection[r]; |
242486dc TW |
93 | } |
94 | ||
95 | public int g() { | |
38c759f8 | 96 | return gammaCorrection[g]; |
242486dc TW |
97 | } |
98 | ||
99 | public int b() { | |
38c759f8 | 100 | return gammaCorrection[b]; |
242486dc TW |
101 | } |
102 | ||
103 | public Color interpolate(Color other, double value) { | |
104 | double invertedValue = 1 - value; | |
105 | return Color.rgb( | |
106 | (int)(r * invertedValue + other.r * value), | |
107 | (int)(g * invertedValue + other.g * value), | |
108 | (int)(b * invertedValue + other.b * value) | |
109 | ); | |
110 | } | |
88438046 TW |
111 | |
112 | @Override | |
113 | public String toString() { | |
114 | return "Color{r=" + r + ", g=" + g + ", b=" + b + "}"; | |
115 | } | |
242486dc | 116 | } |