Fix AutoOrientProcessor

src/ImageSharp/DefaultInternalImageProcessorContext.cs

@@ -54,8 +54,7 @@ namespace SixLabors.ImageSharp
                 // This will only work if the first processor applied is the cloning one thus
                 // realistically for this optermissation to work the resize must the first processor
                 // applied any only up processors will take the douple data path.
-                var cloningImageProcessor = processor as ICloningImageProcessor<TPixel>;
-                if (cloningImageProcessor != null)
+                if (processor is ICloningImageProcessor<TPixel> cloningImageProcessor)
                 {
                     this.destination = cloningImageProcessor.CloneAndApply(this.source, rectangle);
                     return this;

src/ImageSharp/Image/ImageFrame{TPixel}.cs

@@ -155,7 +155,7 @@ namespace SixLabors.ImageSharp
             Guard.NotNull(pixelSource, nameof(pixelSource));
 
             // Push my memory into the accessor (which in turn unpins the old buffer ready for the images use)
-            var newPixels = pixelSource.SwapBufferOwnership(this.pixelBuffer);
+            Buffer2D<TPixel> newPixels = pixelSource.SwapBufferOwnership(this.pixelBuffer);
             this.pixelBuffer = newPixels;
         }
 
@@ -169,7 +169,7 @@ namespace SixLabors.ImageSharp
 
             int newWidth = pixelSource.Width;
             int newHeight = pixelSource.Height;
-            var newPixels = pixelSource.pixelBuffer;
+            Buffer2D<TPixel> newPixels = pixelSource.pixelBuffer;
 
             pixelSource.pixelBuffer = this.pixelBuffer;
 
@@ -227,7 +227,7 @@ namespace SixLabors.ImageSharp
                     {
                         for (int x = 0; x < target.Width; x++)
                         {
-                            TPixel2 color = default(TPixel2);
+                            var color = default(TPixel2);
                             color.PackFromVector4(scaleFunc(pixels[x, y].ToVector4()));
                             targetPixels[x, y] = color;
                         }

src/ImageSharp/Processing/Processors/ImageProcessor.cs

@@ -25,7 +25,6 @@ namespace SixLabors.ImageSharp.Processing
                 foreach (ImageFrame<TPixel> sourceFrame in source.Frames)
                 {
                     this.BeforeApply(sourceFrame, sourceRectangle);
-
                     this.OnApply(sourceFrame, sourceRectangle);
                     this.AfterApply(sourceFrame, sourceRectangle);
                 }

src/ImageSharp/Processing/Processors/Transforms/AutoOrientProcessor.cs

@@ -0,0 +1,103 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+
+using SixLabors.ImageSharp.MetaData.Profiles.Exif;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Processing.Processors
+{
+    /// <summary>
+    /// Adjusts an image so that its orientation is suitable for viewing. Adjustments are based on EXIF metadata embedded in the image.
+    /// </summary>
+    /// <typeparam name="TPixel">The pixel format.</typeparam>
+    internal class AutoOrientProcessor<TPixel> : ImageProcessor<TPixel>
+        where TPixel : struct, IPixel<TPixel>
+    {
+        /// <inheritdoc/>
+        protected override void BeforeImageApply(Image<TPixel> source, Rectangle sourceRectangle)
+        {
+            Orientation orientation = GetExifOrientation(source);
+
+            switch (orientation)
+            {
+                case Orientation.TopRight:
+                    new FlipProcessor<TPixel>(FlipType.Horizontal).Apply(source, sourceRectangle);
+                    break;
+
+                case Orientation.BottomRight:
+                    new RotateProcessor<TPixel> { Angle = (int)RotateType.Rotate180, Expand = false }.Apply(source, sourceRectangle);
+                    break;
+
+                case Orientation.BottomLeft:
+                    new FlipProcessor<TPixel>(FlipType.Vertical).Apply(source, sourceRectangle);
+                    break;
+
+                case Orientation.LeftTop:
+                    new RotateProcessor<TPixel> { Angle = (int)RotateType.Rotate90, Expand = false }.Apply(source, sourceRectangle);
+                    new FlipProcessor<TPixel>(FlipType.Horizontal).Apply(source, sourceRectangle);
+                    break;
+
+                case Orientation.RightTop:
+                    new RotateProcessor<TPixel> { Angle = (int)RotateType.Rotate90, Expand = false }.Apply(source, sourceRectangle);
+                    break;
+
+                case Orientation.RightBottom:
+                    new FlipProcessor<TPixel>(FlipType.Vertical).Apply(source, sourceRectangle);
+                    new RotateProcessor<TPixel> { Angle = (int)RotateType.Rotate270, Expand = false }.Apply(source, sourceRectangle);
+                    break;
+
+                case Orientation.LeftBottom:
+                    new RotateProcessor<TPixel> { Angle = (int)RotateType.Rotate270, Expand = false }.Apply(source, sourceRectangle);
+                    break;
+
+                case Orientation.Unknown:
+                case Orientation.TopLeft:
+                default:
+                    break;
+            }
+        }
+
+        /// <inheritdoc />
+        protected override void OnApply(ImageFrame<TPixel> source, Rectangle sourceRectangle)
+        {
+            // Nothing required here
+        }
+
+        /// <summary>
+        /// Returns the current EXIF orientation
+        /// </summary>
+        /// <param name="source">The image to auto rotate.</param>
+        /// <returns>The <see cref="Orientation"/></returns>
+        private static Orientation GetExifOrientation(Image<TPixel> source)
+        {
+            if (source.MetaData.ExifProfile == null)
+            {
+                return Orientation.Unknown;
+            }
+
+            ExifValue value = source.MetaData.ExifProfile.GetValue(ExifTag.Orientation);
+            if (value == null)
+            {
+                return Orientation.Unknown;
+            }
+
+            Orientation orientation;
+            if (value.DataType == ExifDataType.Short)
+            {
+                orientation = (Orientation)value.Value;
+            }
+            else
+            {
+                orientation = (Orientation)Convert.ToUInt16(value.Value);
+                source.MetaData.ExifProfile.RemoveValue(ExifTag.Orientation);
+            }
+
+            source.MetaData.ExifProfile.SetValue(ExifTag.Orientation, (ushort)Orientation.TopLeft);
+
+            return orientation;
+        }
+    }
+}

src/ImageSharp/Processing/Processors/Transforms/AutoRotateProcessor.cs

@@ -1,110 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using System.Threading.Tasks;
-using SixLabors.ImageSharp.Memory;
-using SixLabors.ImageSharp.MetaData.Profiles.Exif;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.Primitives;
-
-namespace SixLabors.ImageSharp.Processing.Processors
-{
-    /// <summary>
-    /// Adjusts an image so that its orientation is suitable for viewing. Adjustments are based on EXIF metadata embedded in the image.
-    /// </summary>
-    /// <typeparam name="TPixel">The pixel format.</typeparam>
-    internal class AutoRotateProcessor<TPixel> : ImageProcessor<TPixel>
-        where TPixel : struct, IPixel<TPixel>
-    {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="AutoRotateProcessor{TPixel}"/> class.
-        /// </summary>
-        public AutoRotateProcessor()
-        {
-        }
-
-        /// <inheritdoc/>
-        protected override void OnApply(ImageFrame<TPixel> sourceBase, Rectangle sourceRectangle)
-        {
-            // can only apply to the origional image
-            var source = sourceBase as Image<TPixel>;
-            if (source != null)
-            {
-                Orientation orientation = GetExifOrientation(source);
-
-                switch (orientation)
-                {
-                    case Orientation.TopRight:
-                        new FlipProcessor<TPixel>(FlipType.Horizontal).Apply(source, sourceRectangle);
-                        break;
-
-                    case Orientation.BottomRight:
-                        new RotateProcessor<TPixel>() { Angle = (int)RotateType.Rotate180, Expand = false }.Apply(source, sourceRectangle);
-                        break;
-
-                    case Orientation.BottomLeft:
-                        new FlipProcessor<TPixel>(FlipType.Vertical).Apply(source, sourceRectangle);
-                        break;
-
-                    case Orientation.LeftTop:
-                        new RotateProcessor<TPixel>() { Angle = (int)RotateType.Rotate90, Expand = false }.Apply(source, sourceRectangle);
-                        new FlipProcessor<TPixel>(FlipType.Horizontal).Apply(source, sourceRectangle);
-                        break;
-
-                    case Orientation.RightTop:
-                        new RotateProcessor<TPixel>() { Angle = (int)RotateType.Rotate90, Expand = false }.Apply(source, sourceRectangle);
-                        break;
-
-                    case Orientation.RightBottom:
-                        new FlipProcessor<TPixel>(FlipType.Vertical).Apply(source, sourceRectangle);
-                        new RotateProcessor<TPixel>() { Angle = (int)RotateType.Rotate270, Expand = false }.Apply(source, sourceRectangle);
-                        break;
-
-                    case Orientation.LeftBottom:
-                        new RotateProcessor<TPixel>() { Angle = (int)RotateType.Rotate270, Expand = false }.Apply(source, sourceRectangle);
-                        break;
-
-                    case Orientation.Unknown:
-                    case Orientation.TopLeft:
-                    default:
-                        break;
-                }
-            }
-        }
-
-        /// <summary>
-        /// Returns the current EXIF orientation
-        /// </summary>
-        /// <param name="source">The image to auto rotate.</param>
-        /// <returns>The <see cref="Orientation"/></returns>
-        private static Orientation GetExifOrientation(Image<TPixel> source)
-        {
-            if (source.MetaData.ExifProfile == null)
-            {
-                return Orientation.Unknown;
-            }
-
-            ExifValue value = source.MetaData.ExifProfile.GetValue(ExifTag.Orientation);
-            if (value == null)
-            {
-                return Orientation.Unknown;
-            }
-
-            Orientation orientation;
-            if (value.DataType == ExifDataType.Short)
-            {
-                orientation = (Orientation)value.Value;
-            }
-            else
-            {
-                orientation = (Orientation)Convert.ToUInt16(value.Value);
-                source.MetaData.ExifProfile.RemoveValue(ExifTag.Orientation);
-            }
-
-            source.MetaData.ExifProfile.SetValue(ExifTag.Orientation, (ushort)Orientation.TopLeft);
-
-            return orientation;
-        }
-    }
-}

src/ImageSharp/Processing/Transforms/AutoOrient.cs

@@ -20,6 +20,6 @@ namespace SixLabors.ImageSharp
         /// <returns>The <see cref="Image{TPixel}"/></returns>
         public static IImageProcessingContext<TPixel> AutoOrient<TPixel>(this IImageProcessingContext<TPixel> source)
             where TPixel : struct, IPixel<TPixel>
-            => source.ApplyProcessor(new Processing.Processors.AutoRotateProcessor<TPixel>());
+            => source.ApplyProcessor(new Processing.Processors.AutoOrientProcessor<TPixel>());
     }
 }

tests/ImageSharp.Tests/Processing/Transforms/AutoOrientTests.cs

@@ -15,7 +15,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Transforms
         public void AutoOrient_AutoRotateProcessor()
         {
             this.operations.AutoOrient();
-            this.Verify<AutoRotateProcessor<Rgba32>>();
+            this.Verify<AutoOrientProcessor<Rgba32>>();
         }
     }
 }