From 3a2d001eaf1ce777fa27db17ba6737a9d995817c Mon Sep 17 00:00:00 2001
From: dirk <dirk@git.imagemagick.org>
Date: Sat, 13 Aug 2016 15:31:12 +0200
Subject: [PATCH] Moved the Flip and Rotate code from FlipRotate to their own
 Processors and call those inside RotateFlip.

Former-commit-id: 59a0db810427fcfd9c7426392f5de94317d928bd
Former-commit-id: 89d27c015fbc972372f3697c06864dd71f458574
Former-commit-id: 160b946dcbfc868be3d014c2ef6410cbb40d4ef7
---
 src/ImageProcessorCore/Samplers/Flip.cs       |  41 +++
 .../Samplers/Options/RotateType.cs            |   6 +-
 .../Samplers/Processors/FlipProcessor.cs      | 119 +++++++++
 .../Processors/RotateFlipProcessor.cs         | 240 ------------------
 .../Samplers/Processors/RotateProcessor.cs    | 139 ++++++++++
 src/ImageProcessorCore/Samplers/Rotate.cs     |  16 ++
 src/ImageProcessorCore/Samplers/RotateFlip.cs |  15 +-
 7 files changed, 321 insertions(+), 255 deletions(-)
 create mode 100644 src/ImageProcessorCore/Samplers/Flip.cs
 create mode 100644 src/ImageProcessorCore/Samplers/Processors/FlipProcessor.cs
 delete mode 100644 src/ImageProcessorCore/Samplers/Processors/RotateFlipProcessor.cs

diff --git a/src/ImageProcessorCore/Samplers/Flip.cs b/src/ImageProcessorCore/Samplers/Flip.cs
new file mode 100644
index 0000000000..9e0bd3121c
--- /dev/null
+++ b/src/ImageProcessorCore/Samplers/Flip.cs
@@ -0,0 +1,41 @@
+// <copyright file="RotateFlip.cs" company="James Jackson-South">
+// Copyright (c) James Jackson-South and contributors.
+// Licensed under the Apache License, Version 2.0.
+// </copyright>
+
+namespace ImageProcessorCore
+{
+    using Processors;
+
+    /// <summary>
+    /// Extension methods for the <see cref="Image{T,TP}"/> type.
+    /// </summary>
+    public static partial class ImageExtensions
+    {
+        /// <summary>
+        /// Flips an image by the given instructions.
+        /// </summary>
+        /// <typeparam name="T">The pixel format.</typeparam>
+        /// <typeparam name="TP">The packed format. <example>long, float.</example></typeparam>
+        /// <param name="source">The image to rotate, flip, or both.</param>
+        /// <param name="flipType">The <see cref="FlipType"/> to perform the flip.</param>
+        /// <param name="progressHandler">A delegate which is called as progress is made processing the image.</param>
+        /// <returns>The <see cref="Image"/></returns>
+        public static Image<T, TP> Flip<T, TP>(this Image<T, TP> source, FlipType flipType, ProgressEventHandler progressHandler = null)
+            where T : IPackedVector<TP>
+            where TP : struct
+        {
+            FlipProcessor<T, TP> processor = new FlipProcessor<T, TP>(flipType);
+            processor.OnProgress += progressHandler;
+
+            try
+            {
+                return source.Process(source.Width, source.Height, source.Bounds, source.Bounds, processor);
+            }
+            finally
+            {
+                processor.OnProgress -= progressHandler;
+            }
+        }
+    }
+}
diff --git a/src/ImageProcessorCore/Samplers/Options/RotateType.cs b/src/ImageProcessorCore/Samplers/Options/RotateType.cs
index 43644de858..a2572bee1d 100644
--- a/src/ImageProcessorCore/Samplers/Options/RotateType.cs
+++ b/src/ImageProcessorCore/Samplers/Options/RotateType.cs
@@ -18,16 +18,16 @@ namespace ImageProcessorCore
         /// <summary>
         /// Rotate the image by 90 degrees clockwise.
         /// </summary>
-        Rotate90,
+        Rotate90 = 90,
 
         /// <summary>
         /// Rotate the image by 180 degrees clockwise.
         /// </summary>
-        Rotate180,
+        Rotate180 = 180,
 
         /// <summary>
         /// Rotate the image by 270 degrees clockwise.
         /// </summary>
-        Rotate270
+        Rotate270 = 270
     }
 }
diff --git a/src/ImageProcessorCore/Samplers/Processors/FlipProcessor.cs b/src/ImageProcessorCore/Samplers/Processors/FlipProcessor.cs
new file mode 100644
index 0000000000..c4de4a121e
--- /dev/null
+++ b/src/ImageProcessorCore/Samplers/Processors/FlipProcessor.cs
@@ -0,0 +1,119 @@
+// <copyright file="RotateFlipProcessor.cs" company="James Jackson-South">
+// Copyright (c) James Jackson-South and contributors.
+// Licensed under the Apache License, Version 2.0.
+// </copyright>
+
+namespace ImageProcessorCore.Processors
+{
+    using System;
+    using System.Threading.Tasks;
+
+    /// <summary>
+    /// Provides methods that allow the flipping of an image around its center point.
+    /// </summary>
+    /// <typeparam name="T">The pixel format.</typeparam>
+    /// <typeparam name="TP">The packed format. <example>long, float.</example></typeparam>
+    public class FlipProcessor<T, TP> : ImageSampler<T, TP>
+        where T : IPackedVector<TP>
+        where TP : struct
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FlipProcessor{T,TP}"/> class.
+        /// </summary>
+        /// <param name="flipType">The <see cref="FlipType"/> used to perform flipping.</param>
+        public FlipProcessor(FlipType flipType)
+        {
+            this.FlipType = flipType;
+        }
+
+        /// <summary>
+        /// Gets the <see cref="FlipType"/> used to perform flipping.
+        /// </summary>
+        public FlipType FlipType { get; }
+
+        /// <inheritdoc/>
+        protected override void Apply(ImageBase<T, TP> target, ImageBase<T, TP> source, Rectangle targetRectangle, Rectangle sourceRectangle, int startY, int endY)
+        {
+            target.ClonePixels(target.Width, target.Height, source.Pixels);
+
+            switch (this.FlipType)
+            {
+                // No default needed as we have already set the pixels.
+                case FlipType.Vertical:
+                    this.FlipX(target);
+                    break;
+                case FlipType.Horizontal:
+                    this.FlipY(target);
+                    break;
+            }
+        }
+
+        /// <summary>
+        /// Swaps the image at the X-axis, which goes horizontally through the middle
+        /// at half the height of the image.
+        /// </summary>
+        /// <param name="target">Target image to apply the process to.</param>
+        private void FlipX(ImageBase<T, TP> target)
+        {
+            int width = target.Width;
+            int height = target.Height;
+            int halfHeight = (int)Math.Ceiling(target.Height * .5F);
+            Image<T, TP> temp = new Image<T, TP>(width, height);
+            temp.ClonePixels(width, height, target.Pixels);
+
+            using (IPixelAccessor<T, TP> targetPixels = target.Lock())
+            using (IPixelAccessor<T, TP> tempPixels = temp.Lock())
+            {
+                Parallel.For(
+                    0,
+                    halfHeight,
+                    this.ParallelOptions,
+                    y =>
+                        {
+                            for (int x = 0; x < width; x++)
+                            {
+                                int newY = height - y - 1;
+                                targetPixels[x, y] = tempPixels[x, newY];
+                                targetPixels[x, newY] = tempPixels[x, y];
+                            }
+
+                            this.OnRowProcessed();
+                        });
+            }
+        }
+
+        /// <summary>
+        /// Swaps the image at the Y-axis, which goes vertically through the middle
+        /// at half of the width of the image.
+        /// </summary>
+        /// <param name="target">Target image to apply the process to.</param>
+        private void FlipY(ImageBase<T, TP> target)
+        {
+            int width = target.Width;
+            int height = target.Height;
+            int halfWidth = (int)Math.Ceiling(width * .5F);
+            Image<T, TP> temp = new Image<T, TP>(width, height);
+            temp.ClonePixels(width, height, target.Pixels);
+
+            using (IPixelAccessor<T, TP> targetPixels = target.Lock())
+            using (IPixelAccessor<T, TP> tempPixels = temp.Lock())
+            {
+                Parallel.For(
+                    0,
+                    height,
+                    this.ParallelOptions,
+                    y =>
+                        {
+                            for (int x = 0; x < halfWidth; x++)
+                            {
+                                int newX = width - x - 1;
+                                targetPixels[x, y] = tempPixels[newX, y];
+                                targetPixels[newX, y] = tempPixels[x, y];
+                            }
+
+                            this.OnRowProcessed();
+                        });
+            }
+        }
+    }
+}
diff --git a/src/ImageProcessorCore/Samplers/Processors/RotateFlipProcessor.cs b/src/ImageProcessorCore/Samplers/Processors/RotateFlipProcessor.cs
deleted file mode 100644
index 764e68de68..0000000000
--- a/src/ImageProcessorCore/Samplers/Processors/RotateFlipProcessor.cs
+++ /dev/null
@@ -1,240 +0,0 @@
-// <copyright file="RotateFlipProcessor.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
-// Licensed under the Apache License, Version 2.0.
-// </copyright>
-
-namespace ImageProcessorCore.Processors
-{
-    using System;
-    using System.Threading.Tasks;
-
-    /// <summary>
-    /// Provides methods that allow the rotation and flipping of an image around its center point.
-    /// </summary>
-    /// <typeparam name="T">The pixel format.</typeparam>
-    /// <typeparam name="TP">The packed format. <example>long, float.</example></typeparam>
-    public class RotateFlipProcessor<T, TP> : ImageSampler<T, TP>
-        where T : IPackedVector<TP>
-        where TP : struct
-    {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="RotateFlipProcessor{T,TP}"/> class.
-        /// </summary>
-        /// <param name="rotateType">The <see cref="RotateType"/> used to perform rotation.</param>
-        /// <param name="flipType">The <see cref="FlipType"/> used to perform flipping.</param>
-        public RotateFlipProcessor(RotateType rotateType, FlipType flipType)
-        {
-            this.RotateType = rotateType;
-            this.FlipType = flipType;
-        }
-
-        /// <summary>
-        /// Gets the <see cref="FlipType"/> used to perform flipping.
-        /// </summary>
-        public FlipType FlipType { get; }
-
-        /// <summary>
-        /// Gets the <see cref="RotateType"/> used to perform rotation.
-        /// </summary>
-        public RotateType RotateType { get; }
-
-        /// <inheritdoc/>
-        protected override void Apply(ImageBase<T, TP> target, ImageBase<T, TP> source, Rectangle targetRectangle, Rectangle sourceRectangle, int startY, int endY)
-        {
-            switch (this.RotateType)
-            {
-                case RotateType.Rotate90:
-                    this.Rotate90(target, source);
-                    break;
-                case RotateType.Rotate180:
-                    this.Rotate180(target, source);
-                    break;
-                case RotateType.Rotate270:
-                    this.Rotate270(target, source);
-                    break;
-                default:
-                    target.ClonePixels(target.Width, target.Height, source.Pixels);
-                    break;
-            }
-
-            switch (this.FlipType)
-            {
-                // No default needed as we have already set the pixels.
-                case FlipType.Vertical:
-                    this.FlipX(target);
-                    break;
-                case FlipType.Horizontal:
-                    this.FlipY(target);
-                    break;
-            }
-        }
-
-        /// <summary>
-        /// Rotates the image 270 degrees clockwise at the centre point.
-        /// </summary>
-        /// <param name="target">The target image.</param>
-        /// <param name="source">The source image.</param>
-        private void Rotate270(ImageBase<T, TP> target, ImageBase<T, TP> source)
-        {
-            int width = source.Width;
-            int height = source.Height;
-            Image<T, TP> temp = new Image<T, TP>(height, width);
-
-            using (IPixelAccessor<T, TP> sourcePixels = source.Lock())
-            using (IPixelAccessor<T, TP> tempPixels = temp.Lock())
-            {
-                Parallel.For(
-                    0,
-                    height,
-                    this.ParallelOptions,
-                    y =>
-                        {
-                            for (int x = 0; x < width; x++)
-                            {
-                                int newX = height - y - 1;
-                                newX = height - newX - 1;
-                                int newY = width - x - 1;
-                                newY = width - newY - 1;
-                                tempPixels[newX, newY] = sourcePixels[x, y];
-                            }
-
-                            this.OnRowProcessed();
-                        });
-            }
-
-            target.SetPixels(height, width, temp.Pixels);
-        }
-
-        /// <summary>
-        /// Rotates the image 180 degrees clockwise at the centre point.
-        /// </summary>
-        /// <param name="target">The target image.</param>
-        /// <param name="source">The source image.</param>
-        private void Rotate180(ImageBase<T, TP> target, ImageBase<T, TP> source)
-        {
-            int width = source.Width;
-            int height = source.Height;
-
-            using (IPixelAccessor<T, TP> sourcePixels = source.Lock())
-            using (IPixelAccessor<T, TP> targetPixels = target.Lock())
-            {
-                Parallel.For(
-                    0,
-                    height,
-                    this.ParallelOptions,
-                    y =>
-                        {
-                            for (int x = 0; x < width; x++)
-                            {
-                                int newX = width - x - 1;
-                                int newY = height - y - 1;
-                                targetPixels[newX, newY] = sourcePixels[x, y];
-                            }
-
-                            this.OnRowProcessed();
-                        });
-            }
-        }
-
-        /// <summary>
-        /// Rotates the image 90 degrees clockwise at the centre point.
-        /// </summary>
-        /// <param name="target">The target image.</param>
-        /// <param name="source">The source image.</param>
-        private void Rotate90(ImageBase<T, TP> target, ImageBase<T, TP> source)
-        {
-            int width = source.Width;
-            int height = source.Height;
-            Image<T, TP> temp = new Image<T, TP>(height, width);
-
-            using (IPixelAccessor<T, TP> sourcePixels = source.Lock())
-            using (IPixelAccessor<T, TP> tempPixels = temp.Lock())
-            {
-                Parallel.For(
-                    0,
-                    height,
-                    this.ParallelOptions,
-                    y =>
-                        {
-                            for (int x = 0; x < width; x++)
-                            {
-                                int newX = height - y - 1;
-                                tempPixels[newX, x] = sourcePixels[x, y];
-                            }
-
-                            this.OnRowProcessed();
-                        });
-            }
-
-            target.SetPixels(height, width, temp.Pixels);
-        }
-
-        /// <summary>
-        /// Swaps the image at the X-axis, which goes horizontally through the middle
-        /// at half the height of the image.
-        /// </summary>
-        /// <param name="target">Target image to apply the process to.</param>
-        private void FlipX(ImageBase<T, TP> target)
-        {
-            int width = target.Width;
-            int height = target.Height;
-            int halfHeight = (int)Math.Ceiling(target.Height * .5F);
-            Image<T, TP> temp = new Image<T, TP>(width, height);
-            temp.ClonePixels(width, height, target.Pixels);
-
-            using (IPixelAccessor<T, TP> targetPixels = target.Lock())
-            using (IPixelAccessor<T, TP> tempPixels = temp.Lock())
-            {
-                Parallel.For(
-                    0,
-                    halfHeight,
-                    this.ParallelOptions,
-                    y =>
-                        {
-                            for (int x = 0; x < width; x++)
-                            {
-                                int newY = height - y - 1;
-                                targetPixels[x, y] = tempPixels[x, newY];
-                                targetPixels[x, newY] = tempPixels[x, y];
-                            }
-
-                            this.OnRowProcessed();
-                        });
-            }
-        }
-
-        /// <summary>
-        /// Swaps the image at the Y-axis, which goes vertically through the middle
-        /// at half of the width of the image.
-        /// </summary>
-        /// <param name="target">Target image to apply the process to.</param>
-        private void FlipY(ImageBase<T, TP> target)
-        {
-            int width = target.Width;
-            int height = target.Height;
-            int halfWidth = (int)Math.Ceiling(width * .5F);
-            Image<T, TP> temp = new Image<T, TP>(width, height);
-            temp.ClonePixels(width, height, target.Pixels);
-
-            using (IPixelAccessor<T, TP> targetPixels = target.Lock())
-            using (IPixelAccessor<T, TP> tempPixels = temp.Lock())
-            {
-                Parallel.For(
-                    0,
-                    height,
-                    this.ParallelOptions,
-                    y =>
-                        {
-                            for (int x = 0; x < halfWidth; x++)
-                            {
-                                int newX = width - x - 1;
-                                targetPixels[x, y] = tempPixels[newX, y];
-                                targetPixels[newX, y] = tempPixels[x, y];
-                            }
-
-                            this.OnRowProcessed();
-                        });
-            }
-        }
-    }
-}
diff --git a/src/ImageProcessorCore/Samplers/Processors/RotateProcessor.cs b/src/ImageProcessorCore/Samplers/Processors/RotateProcessor.cs
index 97faf89331..e4568fd2d1 100644
--- a/src/ImageProcessorCore/Samplers/Processors/RotateProcessor.cs
+++ b/src/ImageProcessorCore/Samplers/Processors/RotateProcessor.cs
@@ -34,6 +34,11 @@ namespace ImageProcessorCore.Processors
         /// <inheritdoc/>
         protected override void OnApply(ImageBase<T, TP> target, ImageBase<T, TP> source, Rectangle targetRectangle, Rectangle sourceRectangle)
         {
+            if (Angle == 90 || Angle == 180 || Angle == 270)
+            {
+                return;
+            }
+
             this.processMatrix = Point.CreateRotation(new Point(0, 0), -this.Angle);
             if (this.Expand)
             {
@@ -44,6 +49,11 @@ namespace ImageProcessorCore.Processors
         /// <inheritdoc/>
         protected override void Apply(ImageBase<T, TP> target, ImageBase<T, TP> source, Rectangle targetRectangle, Rectangle sourceRectangle, int startY, int endY)
         {
+            if (OptimizedApply(target, source))
+            {
+                return;
+            }
+
             int height = target.Height;
             int width = target.Width;
             Matrix3x2 matrix = GetCenteredMatrix(target, source, this.processMatrix);
@@ -70,5 +80,134 @@ namespace ImageProcessorCore.Processors
                     });
             }
         }
+
+        /// <summary>
+        /// Rotates the images with an optimized method when the angle is 90, 180 or 270 degrees.
+        /// </summary>
+        /// <param name="target">The target image.</param>
+        /// <param name="source">The source image.</param>
+        /// <returns></returns>
+        private bool OptimizedApply(ImageBase<T, TP> target, ImageBase<T, TP> source)
+        {
+            if (Angle == 90)
+            {
+                this.Rotate90(target, source);
+                return true;
+            }
+
+            if (Angle == 180)
+            {
+                this.Rotate180(target, source);
+                return true;
+            }
+
+            if (Angle == 270)
+            {
+                this.Rotate270(target, source);
+                return true;
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Rotates the image 270 degrees clockwise at the centre point.
+        /// </summary>
+        /// <param name="target">The target image.</param>
+        /// <param name="source">The source image.</param>
+        private void Rotate270(ImageBase<T, TP> target, ImageBase<T, TP> source)
+        {
+            int width = source.Width;
+            int height = source.Height;
+            Image<T, TP> temp = new Image<T, TP>(height, width);
+
+            using (IPixelAccessor<T, TP> sourcePixels = source.Lock())
+            using (IPixelAccessor<T, TP> tempPixels = temp.Lock())
+            {
+                Parallel.For(
+                    0,
+                    height,
+                    this.ParallelOptions,
+                    y =>
+                    {
+                        for (int x = 0; x < width; x++)
+                        {
+                            int newX = height - y - 1;
+                            newX = height - newX - 1;
+                            int newY = width - x - 1;
+                            newY = width - newY - 1;
+                            tempPixels[newX, newY] = sourcePixels[x, y];
+                        }
+
+                        this.OnRowProcessed();
+                    });
+            }
+
+            target.SetPixels(height, width, temp.Pixels);
+        }
+
+        /// <summary>
+        /// Rotates the image 180 degrees clockwise at the centre point.
+        /// </summary>
+        /// <param name="target">The target image.</param>
+        /// <param name="source">The source image.</param>
+        private void Rotate180(ImageBase<T, TP> target, ImageBase<T, TP> source)
+        {
+            int width = source.Width;
+            int height = source.Height;
+
+            using (IPixelAccessor<T, TP> sourcePixels = source.Lock())
+            using (IPixelAccessor<T, TP> targetPixels = target.Lock())
+            {
+                Parallel.For(
+                    0,
+                    height,
+                    this.ParallelOptions,
+                    y =>
+                    {
+                        for (int x = 0; x < width; x++)
+                        {
+                            int newX = width - x - 1;
+                            int newY = height - y - 1;
+                            targetPixels[newX, newY] = sourcePixels[x, y];
+                        }
+
+                        this.OnRowProcessed();
+                    });
+            }
+        }
+
+        /// <summary>
+        /// Rotates the image 90 degrees clockwise at the centre point.
+        /// </summary>
+        /// <param name="target">The target image.</param>
+        /// <param name="source">The source image.</param>
+        private void Rotate90(ImageBase<T, TP> target, ImageBase<T, TP> source)
+        {
+            int width = source.Width;
+            int height = source.Height;
+            Image<T, TP> temp = new Image<T, TP>(height, width);
+
+            using (IPixelAccessor<T, TP> sourcePixels = source.Lock())
+            using (IPixelAccessor<T, TP> tempPixels = temp.Lock())
+            {
+                Parallel.For(
+                    0,
+                    height,
+                    this.ParallelOptions,
+                    y =>
+                    {
+                        for (int x = 0; x < width; x++)
+                        {
+                            int newX = height - y - 1;
+                            tempPixels[newX, x] = sourcePixels[x, y];
+                        }
+
+                        this.OnRowProcessed();
+                    });
+            }
+
+            target.SetPixels(height, width, temp.Pixels);
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageProcessorCore/Samplers/Rotate.cs b/src/ImageProcessorCore/Samplers/Rotate.cs
index ad00518f14..21249bcc24 100644
--- a/src/ImageProcessorCore/Samplers/Rotate.cs
+++ b/src/ImageProcessorCore/Samplers/Rotate.cs
@@ -28,6 +28,22 @@ namespace ImageProcessorCore
             return Rotate(source, degrees, true, progressHandler);
         }
 
+        /// <summary>
+        /// Rotates and flips an image by the given instructions.
+        /// </summary>
+        /// <typeparam name="T">The pixel format.</typeparam>
+        /// <typeparam name="TP">The packed format. <example>long, float.</example></typeparam>
+        /// <param name="source">The image to rotate.</param>
+        /// <param name="rotateType">The <see cref="RotateType"/> to perform the rotation.</param>
+        /// <param name="progressHandler">A delegate which is called as progress is made processing the image.</param>
+        /// <returns>The <see cref="Image"/></returns>
+        public static Image<T, TP> Rotate<T, TP>(this Image<T, TP> source, RotateType rotateType, ProgressEventHandler progressHandler = null)
+            where T : IPackedVector<TP>
+            where TP : struct
+        {
+            return Rotate(source, (float)rotateType, false, progressHandler);
+        }
+
         /// <summary>
         /// Rotates an image by the given angle in degrees.
         /// </summary>
diff --git a/src/ImageProcessorCore/Samplers/RotateFlip.cs b/src/ImageProcessorCore/Samplers/RotateFlip.cs
index 093af8503f..0cd513d34f 100644
--- a/src/ImageProcessorCore/Samplers/RotateFlip.cs
+++ b/src/ImageProcessorCore/Samplers/RotateFlip.cs
@@ -18,7 +18,6 @@ namespace ImageProcessorCore
         /// <typeparam name="T">The pixel format.</typeparam>
         /// <typeparam name="TP">The packed format. <example>long, float.</example></typeparam>
         /// <param name="source">The image to rotate, flip, or both.</param>
-        /// <param name="rotateType">The <see cref="RotateType"/> to perform the rotation.</param>
         /// <param name="flipType">The <see cref="FlipType"/> to perform the flip.</param>
         /// <param name="progressHandler">A delegate which is called as progress is made processing the image.</param>
         /// <returns>The <see cref="Image"/></returns>
@@ -26,17 +25,9 @@ namespace ImageProcessorCore
             where T : IPackedVector<TP>
             where TP : struct
         {
-            RotateFlipProcessor<T, TP> processor = new RotateFlipProcessor<T, TP>(rotateType, flipType);
-            processor.OnProgress += progressHandler;
-
-            try
-            {
-                return source.Process(source.Width, source.Height, source.Bounds, source.Bounds, processor);
-            }
-            finally
-            {
-                processor.OnProgress -= progressHandler;
-            }
+            return source
+                .Rotate(rotateType, progressHandler)
+                .Flip(flipType, progressHandler);
         }
     }
 }