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CKeyColor.cs

v0.1.0-build.85 Latest Commit ede38f5

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csharp
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1using System;
2using System.Globalization;
3using OpenCKey.Interop;
4
5namespace OpenCKey
6{
7 /// <summary>An opaque sRGB colour (<c>ckey_rgb</c>).</summary>
8 public readonly struct CKeyColor : IEquatable<CKeyColor>
9 {
10 /// <summary>Creates a colour from its channels.</summary>
11 public CKeyColor(byte r, byte g, byte b)
12 {
13 R = r;
14 G = g;
15 B = b;
16 }
17
18 /// <summary>Red channel.</summary>
19 public byte R { get; }
20 /// <summary>Green channel.</summary>
21 public byte G { get; }
22 /// <summary>Blue channel.</summary>
23 public byte B { get; }
24
25 /// <summary>Black.</summary>
26 public static CKeyColor Black => new CKeyColor(0, 0, 0);
27 /// <summary>White.</summary>
28 public static CKeyColor White => new CKeyColor(255, 255, 255);
29
30 /// <summary>From 0xRRGGBB.</summary>
31 public static CKeyColor FromRgb(int rgb) => new CKeyColor((byte)(rgb >> 16), (byte)(rgb >> 8), (byte)rgb);
32
33 /// <summary>Parses "#rrggbb" or "rrggbb".</summary>
34 public static CKeyColor Parse(string hex)
35 {
36 if (hex == null) throw new ArgumentNullException(nameof(hex));
37 string s = hex.StartsWith("#", StringComparison.Ordinal) ? hex.Substring(1) : hex;
38 if (s.Length != 6 || !int.TryParse(s, NumberStyles.AllowHexSpecifier, CultureInfo.InvariantCulture, out int v))
39 throw new FormatException($"'{hex}' is not a #rrggbb colour.");
40 return FromRgb(v);
41 }
42
43 /// <summary>"#rrggbb".</summary>
44 public override string ToString() => $"#{R:x2}{G:x2}{B:x2}";
45
46 /// <inheritdoc />
47 public bool Equals(CKeyColor other) => R == other.R && G == other.G && B == other.B;
48 /// <inheritdoc />
49 public override bool Equals(object? obj) => obj is CKeyColor c && Equals(c);
50 /// <inheritdoc />
51 public override int GetHashCode() => (R << 16) | (G << 8) | B;
52 /// <summary>Equality.</summary>
53 public static bool operator ==(CKeyColor a, CKeyColor b) => a.Equals(b);
54 /// <summary>Inequality.</summary>
55 public static bool operator !=(CKeyColor a, CKeyColor b) => !a.Equals(b);
56
57 internal NativeRgb ToNative() => new NativeRgb { R = R, G = G, B = B };
58 internal static CKeyColor FromNative(NativeRgb c) => new CKeyColor(c.R, c.G, c.B);
59 }
60}