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
|
using System;
using System.Globalization;
using Microsoft.Xna.Framework;
namespace MonoGame.Extended
{
/// <summary>
/// Provides additional methods for working with color
/// </summary>
public static class ColorExtensions
{
public static Color FromHex(string value)
{
var r = int.Parse(value.Substring(1, 2), NumberStyles.HexNumber);
var g = int.Parse(value.Substring(3, 2), NumberStyles.HexNumber);
var b = int.Parse(value.Substring(5, 2), NumberStyles.HexNumber);
var a = value.Length > 7 ? int.Parse(value.Substring(7, 2), NumberStyles.HexNumber) : 255;
return new Color(r, g, b, a);
}
public static Color ToRgb(this HslColor c)
{
var h = c.H;
var s = c.S;
var l = c.L;
if (s == 0f)
return new Color(l, l, l);
h = h/360f;
var max = l < 0.5f ? l*(1 + s) : l + s - l*s;
var min = 2f*l - max;
return new Color(
ComponentFromHue(min, max, h + 1f/3f),
ComponentFromHue(min, max, h),
ComponentFromHue(min, max, h - 1f/3f));
}
private static float ComponentFromHue(float m1, float m2, float h)
{
h = (h + 1f)%1f;
if (h*6f < 1)
return m1 + (m2 - m1)*6f*h;
if (h*2 < 1)
return m2;
if (h*3 < 2)
return m1 + (m2 - m1)*(2f/3f - h)*6f;
return m1;
}
public static HslColor ToHsl(this Color c)
{
var r = c.R/255f;
var b = c.B/255f;
var g = c.G/255f;
var max = Math.Max(Math.Max(r, g), b);
var min = Math.Min(Math.Min(r, g), b);
var chroma = max - min;
var sum = max + min;
var l = sum*0.5f;
if (chroma == 0)
return new HslColor(0f, 0f, l);
float h;
if (r == max)
h = (60*(g - b)/chroma + 360)%360;
else
{
if (g == max)
h = 60*(b - r)/chroma + 120f;
else
h = 60*(r - g)/chroma + 240f;
}
var s = l <= 0.5f ? chroma/sum : chroma/(2f - sum);
return new HslColor(h, s, l);
}
}
}
|
