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74 lines
3.0 KiB
74 lines
3.0 KiB
// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using System.Collections.Generic;
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using SixLabors.ImageSharp.ColorSpaces;
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using SixLabors.ImageSharp.ColorSpaces.Conversion;
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using Xunit;
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namespace SixLabors.ImageSharp.Tests.Colorspaces
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{
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/// <summary>
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/// Tests <see cref="CieXyz"/>-<see cref="CieLab"/> conversions.
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/// </summary>
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/// <remarks>
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/// Test data generated using:
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/// <see href="http://www.brucelindbloom.com/index.html?ColorCalculator.html"/>
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/// </remarks>
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public class CieXyzAndCieLabConversionTest
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{
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private static readonly IEqualityComparer<float> FloatRoundingComparer = new FloatRoundingComparer(4);
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/// <summary>
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/// Tests conversion from <see cref="CieLab"/> to <see cref="CieXyz"/> (<see cref="Illuminants.D65"/>).
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/// </summary>
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[Theory]
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[InlineData(100, 0, 0, 0.95047, 1, 1.08883)]
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[InlineData(0, 0, 0, 0, 0, 0)]
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[InlineData(0, 431.0345, 0, 0.95047, 0, 0)]
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[InlineData(100, -431.0345, 172.4138, 0, 1, 0)]
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[InlineData(0, 0, -172.4138, 0, 0, 1.08883)]
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[InlineData(45.6398, 39.8753, 35.2091, 0.216938, 0.150041, 0.048850)]
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[InlineData(77.1234, -40.1235, 78.1120, 0.358530, 0.517372, 0.076273)]
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[InlineData(10, -400, 20, 0, 0.011260, 0)]
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public void Convert_Lab_to_Xyz(float l, float a, float b, float x, float y, float z)
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{
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// Arrange
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CieLab input = new CieLab(l, a, b, Illuminants.D65);
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ColorSpaceConverter converter = new ColorSpaceConverter { WhitePoint = Illuminants.D65, TargetLabWhitePoint = Illuminants.D65 };
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// Act
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CieXyz output = converter.ToCieXyz(input);
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// Assert
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Assert.Equal(x, output.X, FloatRoundingComparer);
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Assert.Equal(y, output.Y, FloatRoundingComparer);
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Assert.Equal(z, output.Z, FloatRoundingComparer);
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}
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/// <summary>
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/// Tests conversion from <see cref="CieXyz"/> (<see cref="Illuminants.D65"/>) to <see cref="CieLab"/>.
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/// </summary>
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[Theory]
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[InlineData(0.95047, 1, 1.08883, 100, 0, 0)]
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[InlineData(0, 0, 0, 0, 0, 0)]
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[InlineData(0.95047, 0, 0, 0, 431.0345, 0)]
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[InlineData(0, 1, 0, 100, -431.0345, 172.4138)]
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[InlineData(0, 0, 1.08883, 0, 0, -172.4138)]
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[InlineData(0.216938, 0.150041, 0.048850, 45.6398, 39.8753, 35.2091)]
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public void Convert_Xyz_to_Lab(float x, float y, float z, float l, float a, float b)
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{
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// Arrange
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CieXyz input = new CieXyz(x, y, z);
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ColorSpaceConverter converter = new ColorSpaceConverter { WhitePoint = Illuminants.D65, TargetLabWhitePoint = Illuminants.D65 };
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// Act
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CieLab output = converter.ToCieLab(input);
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// Assert
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Assert.Equal(l, output.L, FloatRoundingComparer);
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Assert.Equal(a, output.A, FloatRoundingComparer);
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Assert.Equal(b, output.B, FloatRoundingComparer);
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}
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}
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}
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