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using System;
namespace Colourful.Implementation.Conversion
{
/// <summary>
/// Converts from <see cref="LabColor" /> to <see cref="LChabColor" />.
/// </summary>
public sealed class LabToLChabConverter : IColorConversion<LabColor, LChabColor>
{
/// <summary>
/// Default singleton instance of the converter.
/// </summary>
public static readonly LabToLChabConverter Default = new LabToLChabConverter();
/// <summary>
/// Converts from <see cref="LabColor" /> to <see cref="LChabColor" />.
/// </summary>
public LChabColor Convert(in LabColor input)
{
double L = input.L, a = input.a, b = input.b;
var C = Math.Sqrt(a * a + b * b);
var hRadians = Math.Atan2(b, a);
var hDegrees = Angle.NormalizeDegree(Angle.RadianToDegree(hRadians));
var output = new LChabColor(L, C, hDegrees, input.WhitePoint);
return output;
}
#region Overrides
/// <inheritdoc cref="object" />
public override bool Equals(object obj) => obj is LabToLChabConverter;
/// <inheritdoc cref="object" />
public override int GetHashCode() => 1;
/// <inheritdoc cref="object" />
public static bool operator ==(LabToLChabConverter left, LabToLChabConverter right) => Equals(left, right);
/// <inheritdoc cref="object" />
public static bool operator !=(LabToLChabConverter left, LabToLChabConverter right) => !Equals(left, right);
#endregion
}
}
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