Refactor IImageProcessor

src/ImageSharp/Processing/Processors/CloningImageProcessor{TPixel}.cs

@@ -15,8 +15,6 @@ namespace SixLabors.ImageSharp.Processing.Processors
     internal abstract class CloningImageProcessor<TPixel> : ICloningImageProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private bool isDisposed;
-
         /// <summary>
         /// Initializes a new instance of the <see cref="CloningImageProcessor{TPixel}"/> class.
         /// </summary>
@@ -104,6 +102,7 @@ namespace SixLabors.ImageSharp.Processing.Processors
         public void Dispose()
         {
             this.Dispose(true);
+            GC.SuppressFinalize(this);
         }
 
         /// <summary>
@@ -160,10 +159,6 @@ namespace SixLabors.ImageSharp.Processing.Processors
         /// <param name="disposing">Whether to dispose managed and unmanaged objects.</param>
         protected virtual void Dispose(bool disposing)
         {
-            if (!this.isDisposed)
-            {
-                this.isDisposed = true;
-            }
         }
     }
 }

src/ImageSharp/Processing/Processors/ImageProcessor{TPixel}.cs

@@ -15,8 +15,6 @@ namespace SixLabors.ImageSharp.Processing.Processors
     internal abstract class ImageProcessor<TPixel> : IImageProcessor<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        private bool isDisposed;
-
         /// <summary>
         /// Initializes a new instance of the <see cref="ImageProcessor{TPixel}"/> class.
         /// </summary>
@@ -97,6 +95,8 @@ namespace SixLabors.ImageSharp.Processing.Processors
         /// <inheritdoc/>
         public virtual void Dispose()
         {
+            this.Dispose(true);
+            GC.SuppressFinalize(this);
         }
 
         /// <summary>
@@ -142,10 +142,6 @@ namespace SixLabors.ImageSharp.Processing.Processors
         /// <param name="disposing">Whether to dispose managed and unmanaged objects.</param>
         protected virtual void Dispose(bool disposing)
         {
-            if (!this.isDisposed)
-            {
-                this.isDisposed = true;
-            }
         }
     }
 }