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76 lines
2.8 KiB
76 lines
2.8 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="CieLab"/>-<see cref="CieLch"/> 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 CieLabAndCieLchConversionTests
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{
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private static readonly IEqualityComparer<float> FloatRoundingComparer = new FloatRoundingComparer(4);
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private static readonly ColorSpaceConverter Converter = new ColorSpaceConverter();
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/// <summary>
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/// Tests conversion from <see cref="CieLch"/> to <see cref="CieLab"/>.
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/// </summary>
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[Theory]
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[InlineData(0, 0, 0, 0, 0, 0)]
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[InlineData(54.2917, 106.8391, 40.8526, 54.2917, 80.8125, 69.8851)]
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[InlineData(100, 0, 0, 100, 0, 0)]
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[InlineData(100, 50, 180, 100, -50, 0)]
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[InlineData(10, 36.0555, 56.3099, 10, 20, 30)]
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[InlineData(10, 36.0555, 123.6901, 10, -20, 30)]
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[InlineData(10, 36.0555, 303.6901, 10, 20, -30)]
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[InlineData(10, 36.0555, 236.3099, 10, -20, -30)]
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public void Convert_Lch_to_Lab(float l, float c, float h, float l2, float a, float b)
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{
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// Arrange
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var input = new CieLch(l, c, h);
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// Act
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var output = Converter.ToCieLab(input);
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// Assert
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Assert.Equal(l2, 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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/// <summary>
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/// Tests conversion from <see cref="CieLab"/> to <see cref="CieLch"/>.
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/// </summary>
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[Theory]
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[InlineData(0, 0, 0, 0, 0, 0)]
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[InlineData(54.2917, 80.8125, 69.8851, 54.2917, 106.8391, 40.8526)]
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[InlineData(100, 0, 0, 100, 0, 0)]
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[InlineData(100, -50, 0, 100, 50, 180)]
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[InlineData(10, 20, 30, 10, 36.0555, 56.3099)]
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[InlineData(10, -20, 30, 10, 36.0555, 123.6901)]
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[InlineData(10, 20, -30, 10, 36.0555, 303.6901)]
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[InlineData(10, -20, -30, 10, 36.0555, 236.3099)]
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public void Convert_Lab_to_LCHab(float l, float a, float b, float l2, float c, float h)
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{
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// Arrange
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var input = new CieLab(l, a, b);
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// Act
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var output = Converter.ToCieLch(input);
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// Assert
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Assert.Equal(l2, output.L, FloatRoundingComparer);
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Assert.Equal(c, output.C, FloatRoundingComparer);
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Assert.Equal(h, output.H, FloatRoundingComparer);
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}
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}
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}
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