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84 lines
3.0 KiB
84 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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// ReSharper disable InconsistentNaming
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using SixLabors.ImageSharp.Formats.Jpeg.Common;
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using SixLabors.ImageSharp.Formats.Jpeg.Common.Decoder;
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using SixLabors.ImageSharp.Formats.Jpeg.GolangPort.Components.Decoder;
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using SixLabors.Primitives;
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using Xunit;
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using Xunit.Abstractions;
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namespace SixLabors.ImageSharp.Tests.Formats.Jpg
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{
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public class ComponentUtilsTests
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{
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public ComponentUtilsTests(ITestOutputHelper output)
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{
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this.Output = output;
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}
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private ITestOutputHelper Output { get; }
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[Theory]
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[InlineData(SubsampleRatio.Ratio410, 4, 2)]
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[InlineData(SubsampleRatio.Ratio411, 4, 1)]
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[InlineData(SubsampleRatio.Ratio420, 2, 2)]
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[InlineData(SubsampleRatio.Ratio422, 2, 1)]
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[InlineData(SubsampleRatio.Ratio440, 1, 2)]
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[InlineData(SubsampleRatio.Ratio444, 1, 1)]
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internal void CalculateChrominanceSize(SubsampleRatio ratio, int expectedDivX, int expectedDivY)
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{
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//this.Output.WriteLine($"RATIO: {ratio}");
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Size size = ratio.CalculateChrominanceSize(400, 400);
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//this.Output.WriteLine($"Ch Size: {size}");
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Assert.Equal(new Size(400 / expectedDivX, 400 / expectedDivY), size);
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}
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[Theory]
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[InlineData(SubsampleRatio.Ratio410, 4, 2)]
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[InlineData(SubsampleRatio.Ratio411, 4, 1)]
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[InlineData(SubsampleRatio.Ratio420, 2, 2)]
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[InlineData(SubsampleRatio.Ratio422, 2, 1)]
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[InlineData(SubsampleRatio.Ratio440, 1, 2)]
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[InlineData(SubsampleRatio.Ratio444, 1, 1)]
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[InlineData(SubsampleRatio.Undefined, 1, 1)]
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internal void GetChrominanceSubSampling(SubsampleRatio ratio, int expectedDivX, int expectedDivY)
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{
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(int divX, int divY) = ratio.GetChrominanceSubSampling();
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Assert.Equal(expectedDivX, divX);
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Assert.Equal(expectedDivY, divY);
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}
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[Theory]
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[InlineData(SubsampleRatio.Ratio410, 4)]
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[InlineData(SubsampleRatio.Ratio411, 4)]
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[InlineData(SubsampleRatio.Ratio420, 2)]
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[InlineData(SubsampleRatio.Ratio422, 2)]
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[InlineData(SubsampleRatio.Ratio440, 1)]
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[InlineData(SubsampleRatio.Ratio444, 1)]
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internal void Create(SubsampleRatio ratio, int expectedCStrideDiv)
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{
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this.Output.WriteLine($"RATIO: {ratio}");
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YCbCrImage img = new YCbCrImage(400, 400, ratio);
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//this.PrintChannel("Y", img.YChannel);
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//this.PrintChannel("Cb", img.CbChannel);
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//this.PrintChannel("Cr", img.CrChannel);
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Assert.Equal(400, img.YChannel.Width);
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Assert.Equal(img.CbChannel.Width, 400 / expectedCStrideDiv);
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Assert.Equal(img.CrChannel.Width, 400 / expectedCStrideDiv);
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}
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private void PrintChannel(string name, OrigJpegPixelArea channel)
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{
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this.Output.WriteLine($"{name}: Stride={channel.Stride}");
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}
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}
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}
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