mirror of https://github.com/SixLabors/ImageSharp
James Jackson-South
8 years ago
95 changed files with 220 additions and 257 deletions
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using System; |
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using SixLabors.ImageSharp.PixelFormats; |
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using SixLabors.ImageSharp.Processing; |
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namespace SixLabors.ImageSharp |
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{ |
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/// <summary>
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/// Extension methods for the <see cref="Image{TPixel}"/> type.
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/// </summary>
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public static partial class ImageExtensions |
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{ |
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/// <summary>
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/// Applies the given operation to the mutable image.
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/// Useful when we need to extract information like Width/Height to parameterize the next operation working on the <see cref="IImageProcessingContext{TPixel}"/> chain.
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/// To achieve this the method actually implements an "inline" <see cref="IImageProcessor{TPixel}"/> with <paramref name="operation"/> as it's processing logic.
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/// </summary>
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/// <typeparam name="TPixel">The pixel format.</typeparam>
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/// <param name="source">The image to mutate.</param>
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/// <param name="operation">The operation to perform on the source.</param>
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/// <returns>The <see cref="IImageProcessingContext{TPixel}"/> to allow chaining of operations.</returns>
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public static IImageProcessingContext<TPixel> Apply<TPixel>(this IImageProcessingContext<TPixel> source, Action<Image<TPixel>> operation) |
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where TPixel : struct, IPixel<TPixel> |
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=> source.ApplyProcessor(new DelegateProcessor<TPixel>(operation)); |
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} |
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} |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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namespace SixLabors.ImageSharp.Tests.Memory |
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{ |
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using System; |
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using SixLabors.ImageSharp.Memory; |
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using Xunit; |
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public class Fast2DArrayTests |
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{ |
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private static readonly float[,] FloydSteinbergMatrix = |
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{ |
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{ 0, 0, 7 }, |
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{ 3, 5, 1 } |
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}; |
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[Fact] |
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public void Fast2DArrayThrowsOnNullInitializer() |
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{ |
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Assert.Throws<ArgumentNullException>(() => |
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{ |
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var fast = new Fast2DArray<float>(null); |
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}); |
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} |
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[Fact] |
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public void Fast2DArrayThrowsOnEmptyZeroWidth() |
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{ |
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Assert.Throws<ArgumentOutOfRangeException>(() => |
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{ |
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var fast = new Fast2DArray<float>(0, 10); |
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}); |
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} |
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[Fact] |
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public void Fast2DArrayThrowsOnEmptyZeroHeight() |
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{ |
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Assert.Throws<ArgumentOutOfRangeException>(() => |
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{ |
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var fast = new Fast2DArray<float>(10, 0); |
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}); |
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} |
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[Fact] |
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public void Fast2DArrayThrowsOnEmptyInitializer() |
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{ |
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Assert.Throws<ArgumentOutOfRangeException>(() => |
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{ |
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var fast = new Fast2DArray<float>(new float[0, 0]); |
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}); |
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} |
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[Fact] |
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public void Fast2DArrayReturnsCorrectDimensions() |
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{ |
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var fast = new Fast2DArray<float>(FloydSteinbergMatrix); |
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Assert.True(fast.Width == FloydSteinbergMatrix.GetLength(1)); |
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Assert.True(fast.Height == FloydSteinbergMatrix.GetLength(0)); |
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} |
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[Fact] |
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public void Fast2DArrayGetReturnsCorrectResults() |
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{ |
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Fast2DArray<float> fast = FloydSteinbergMatrix; |
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for (int row = 0; row < fast.Height; row++) |
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{ |
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for (int column = 0; column < fast.Width; column++) |
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{ |
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Assert.True(Math.Abs(fast[row, column] - FloydSteinbergMatrix[row, column]) < Constants.Epsilon); |
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} |
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} |
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} |
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[Fact] |
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public void Fast2DArrayGetSetReturnsCorrectResults() |
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{ |
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var fast = new Fast2DArray<float>(4, 4); |
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const float Val = 5F; |
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fast[3, 3] = Val; |
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Assert.True(Math.Abs(Val - fast[3, 3]) < Constants.Epsilon); |
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} |
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} |
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} |
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