Remove nullable disable and fix Equals

src/ImageSharp/Processing/Processors/Convolution/ConvolutionProcessorHelpers.cs

@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution;
 
@@ -99,7 +98,7 @@ internal static class ConvolutionProcessorHelpers
     /// <param name="row">The resulting 1D row vector, if possible.</param>
     /// <param name="column">The resulting 1D column vector, if possible.</param>
     /// <returns>Whether or not <paramref name="matrix"/> was linearly separable.</returns>
-    public static bool TryGetLinearlySeparableComponents(this DenseMatrix<float> matrix, out float[] row, out float[] column)
+    public static bool TryGetLinearlySeparableComponents(this DenseMatrix<float> matrix, out float[]? row, out float[]? column)
     {
         int height = matrix.Rows;
         int width = matrix.Columns;

src/ImageSharp/Processing/Processors/Convolution/Kernels/EdgeDetector2DKernel.cs

@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution;
 
@@ -88,7 +87,7 @@ public readonly struct EdgeDetector2DKernel : IEquatable<EdgeDetector2DKernel>
         => !(left == right);
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is EdgeDetector2DKernel kernel && this.Equals(kernel);
 
     /// <inheritdoc/>

src/ImageSharp/Processing/Processors/Convolution/Kernels/EdgeDetectorCompassKernel.cs

@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution;
 
@@ -135,7 +134,7 @@ public readonly struct EdgeDetectorCompassKernel : IEquatable<EdgeDetectorCompas
         => !(left == right);
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is EdgeDetectorCompassKernel kernel && this.Equals(kernel);
+    public override bool Equals(object? obj) => obj is EdgeDetectorCompassKernel kernel && this.Equals(kernel);
 
     /// <inheritdoc/>
     public bool Equals(EdgeDetectorCompassKernel other) => this.North.Equals(other.North) && this.NorthWest.Equals(other.NorthWest) && this.West.Equals(other.West) && this.SouthWest.Equals(other.SouthWest) && this.South.Equals(other.South) && this.SouthEast.Equals(other.SouthEast) && this.East.Equals(other.East) && this.NorthEast.Equals(other.NorthEast);

src/ImageSharp/Processing/Processors/Convolution/Kernels/EdgeDetectorKernel.cs

@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution;
 
@@ -64,7 +63,7 @@ public readonly struct EdgeDetectorKernel : IEquatable<EdgeDetectorKernel>
         => !(left == right);
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is EdgeDetectorKernel kernel && this.Equals(kernel);
 
     /// <inheritdoc/>

src/ImageSharp/Processing/Processors/Convolution/Parameters/BokehBlurParameters.cs

@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Processing.Processors.Convolution.Parameters;
 
@@ -37,7 +36,7 @@ internal readonly struct BokehBlurParameters : IEquatable<BokehBlurParameters>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is BokehBlurParameters other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is BokehBlurParameters other && this.Equals(other);
 
     /// <inheritdoc/>
     public override int GetHashCode()

src/ImageSharp/Processing/Processors/Dithering/ErrorDither.cs

@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -212,7 +211,7 @@ public readonly partial struct ErrorDither : IDither, IEquatable<ErrorDither>, I
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is ErrorDither dither && this.Equals(dither);
 
     /// <inheritdoc/>
@@ -220,8 +219,8 @@ public readonly partial struct ErrorDither : IDither, IEquatable<ErrorDither>, I
         => this.offset == other.offset && this.matrix.Equals(other.matrix);
 
     /// <inheritdoc/>
-    public bool Equals(IDither other)
-        => this.Equals((object)other);
+    public bool Equals(IDither? other)
+        => this.Equals((object?)other);
 
     /// <inheritdoc/>
     public override int GetHashCode()

src/ImageSharp/Processing/Processors/Dithering/OrderedDither.cs

@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Runtime.CompilerServices;
 using SixLabors.ImageSharp.Memory;
@@ -200,7 +199,7 @@ public readonly partial struct OrderedDither : IDither, IEquatable<OrderedDither
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is OrderedDither dither && this.Equals(dither);
 
     /// <inheritdoc/>
@@ -209,8 +208,8 @@ public readonly partial struct OrderedDither : IDither, IEquatable<OrderedDither
         => this.thresholdMatrix.Equals(other.thresholdMatrix) && this.modulusX == other.modulusX && this.modulusY == other.modulusY;
 
     /// <inheritdoc/>
-    public bool Equals(IDither other)
-        => this.Equals((object)other);
+    public bool Equals(IDither? other)
+        => this.Equals((object?)other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]

src/ImageSharp/Processing/Processors/Dithering/PaletteDitherProcessor{TPixel}.cs

@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Buffers;
 using System.Diagnostics.CodeAnalysis;
@@ -19,7 +18,7 @@ internal sealed class PaletteDitherProcessor<TPixel> : ImageProcessor<TPixel>
 {
     private readonly DitherProcessor ditherProcessor;
     private readonly IDither dither;
-    private IMemoryOwner<TPixel> paletteOwner;
+    private IMemoryOwner<TPixel>? paletteOwner;
     private bool isDisposed;
 
     /// <summary>
@@ -62,7 +61,7 @@ internal sealed class PaletteDitherProcessor<TPixel> : ImageProcessor<TPixel>
         this.isDisposed = true;
         if (disposing)
         {
-            this.paletteOwner.Dispose();
+            this.paletteOwner?.Dispose();
             this.ditherProcessor.Dispose();
         }