Adding Hue and HueRotate

Former-commit-id: 654fd398b5ff802c2ad23f0eea38773337dc8ceb

src/ImageProcessor.UnitTests/ImageFactoryUnitTests.cs

@@ -15,6 +15,9 @@ namespace ImageProcessor.UnitTests
     using System.Drawing;
     using System.IO;
     using System.Linq;
+
+    using ImageProcessor.Imaging;
+
     using NUnit.Framework;
 
     /// <summary>
@@ -244,7 +247,7 @@ namespace ImageProcessor.UnitTests
                 {
                     imageFactory.Load(file.FullName);
                     Image original = (Image)imageFactory.Image.Clone();
-                    imageFactory.Watermark(new Imaging.TextLayer
+                    imageFactory.Watermark(new TextLayer
                     {
                         FontFamily = new FontFamily("Arial"),
                         FontSize = 10,
@@ -286,7 +289,7 @@ namespace ImageProcessor.UnitTests
                 {
                     imageFactory.Load(file.FullName);
                     Image original = (Image)imageFactory.Image.Clone();
-                    imageFactory.GaussianBlur(new Imaging.GaussianLayer { Sigma = 10, Size = 5, Threshold = 2 });
+                    imageFactory.GaussianBlur(new GaussianLayer { Sigma = 10, Size = 5, Threshold = 2 });
                     Assert.AreNotEqual(original, imageFactory.Image);
                 }
             }
@@ -322,7 +325,7 @@ namespace ImageProcessor.UnitTests
                 {
                     imageFactory.Load(file.FullName);
                     Image original = (Image)imageFactory.Image.Clone();
-                    imageFactory.GaussianSharpen(new Imaging.GaussianLayer { Sigma = 10, Size = 5, Threshold = 2 });
+                    imageFactory.GaussianSharpen(new GaussianLayer { Sigma = 10, Size = 5, Threshold = 2 });
                     Assert.AreNotEqual(original, imageFactory.Image);
                 }
             }
@@ -341,43 +344,43 @@ namespace ImageProcessor.UnitTests
                     imageFactory.Load(file.FullName);
                     Image original = (Image)imageFactory.Image.Clone();
 
-                    imageFactory.Filter(Imaging.Filters.MatrixFilters.BlackWhite);
+                    imageFactory.Filter(ImageProcessor.Imaging.Filters.MatrixFilters.BlackWhite);
                     Assert.AreNotEqual(original, imageFactory.Image);
                     imageFactory.Reset();
 
-                    imageFactory.Filter(Imaging.Filters.MatrixFilters.Comic);
+                    imageFactory.Filter(ImageProcessor.Imaging.Filters.MatrixFilters.Comic);
                     Assert.AreNotEqual(original, imageFactory.Image);
                     imageFactory.Reset();
 
-                    imageFactory.Filter(Imaging.Filters.MatrixFilters.Gotham);
+                    imageFactory.Filter(ImageProcessor.Imaging.Filters.MatrixFilters.Gotham);
                     Assert.AreNotEqual(original, imageFactory.Image);
                     imageFactory.Reset();
 
-                    imageFactory.Filter(Imaging.Filters.MatrixFilters.GreyScale);
+                    imageFactory.Filter(ImageProcessor.Imaging.Filters.MatrixFilters.GreyScale);
                     Assert.AreNotEqual(original, imageFactory.Image);
                     imageFactory.Reset();
 
-                    imageFactory.Filter(Imaging.Filters.MatrixFilters.HiSatch);
+                    imageFactory.Filter(ImageProcessor.Imaging.Filters.MatrixFilters.HiSatch);
                     Assert.AreNotEqual(original, imageFactory.Image);
                     imageFactory.Reset();
 
-                    imageFactory.Filter(Imaging.Filters.MatrixFilters.Invert);
+                    imageFactory.Filter(ImageProcessor.Imaging.Filters.MatrixFilters.Invert);
                     Assert.AreNotEqual(original, imageFactory.Image);
                     imageFactory.Reset();
 
-                    imageFactory.Filter(Imaging.Filters.MatrixFilters.Lomograph);
+                    imageFactory.Filter(ImageProcessor.Imaging.Filters.MatrixFilters.Lomograph);
                     Assert.AreNotEqual(original, imageFactory.Image);
                     imageFactory.Reset();
 
-                    imageFactory.Filter(Imaging.Filters.MatrixFilters.LoSatch);
+                    imageFactory.Filter(ImageProcessor.Imaging.Filters.MatrixFilters.LoSatch);
                     Assert.AreNotEqual(original, imageFactory.Image);
                     imageFactory.Reset();
 
-                    imageFactory.Filter(Imaging.Filters.MatrixFilters.Polaroid);
+                    imageFactory.Filter(ImageProcessor.Imaging.Filters.MatrixFilters.Polaroid);
                     Assert.AreNotEqual(original, imageFactory.Image);
                     imageFactory.Reset();
 
-                    imageFactory.Filter(Imaging.Filters.MatrixFilters.Sepia);
+                    imageFactory.Filter(ImageProcessor.Imaging.Filters.MatrixFilters.Sepia);
                     Assert.AreNotEqual(original, imageFactory.Image);
                     imageFactory.Reset();
                 }
@@ -396,7 +399,7 @@ namespace ImageProcessor.UnitTests
                 {
                     imageFactory.Load(file.FullName);
                     Image original = (Image)imageFactory.Image.Clone();
-                    imageFactory.RoundedCorners(new Imaging.RoundedCornerLayer(5));
+                    imageFactory.RoundedCorners(new RoundedCornerLayer(5));
                     Assert.AreNotEqual(original, imageFactory.Image);
                 }
             }
@@ -455,7 +458,7 @@ namespace ImageProcessor.UnitTests
                 {
                     imageFactory.Load(file.FullName);
                     Image original = (Image)imageFactory.Image.Clone();
-                    imageFactory.Crop(new Imaging.CropLayer(0, 0, MaxSize, MaxSize, Imaging.CropMode.Pixels));
+                    imageFactory.Crop(new CropLayer(0, 0, MaxSize, MaxSize, CropMode.Pixels));
                     Assert.AreNotEqual(original, imageFactory.Image);
                     Assert.AreEqual(MaxSize, imageFactory.Image.Width);
                     Assert.LessOrEqual(MaxSize, imageFactory.Image.Height);
@@ -481,7 +484,7 @@ namespace ImageProcessor.UnitTests
                     Assert.AreEqual(original.Height, imageFactory.Image.Height);
                     imageFactory.Reset();
 
-                    imageFactory.Flip(false);
+                    imageFactory.Flip();
                     Assert.AreNotEqual(original, imageFactory.Image);
                     Assert.AreEqual(original.Width, imageFactory.Image.Width);
                     Assert.AreEqual(original.Height, imageFactory.Image.Height);
@@ -520,7 +523,7 @@ namespace ImageProcessor.UnitTests
                 using (ImageFactory imageFactory = new ImageFactory())
                 {
                     imageFactory.Load(file.FullName);
-                    imageFactory.Resize(new Imaging.ResizeLayer(new Size(NewSize, NewSize), Imaging.ResizeMode.Stretch, Imaging.AnchorPosition.Left));
+                    imageFactory.Resize(new ResizeLayer(new Size(NewSize, NewSize), ResizeMode.Stretch, AnchorPosition.Left));
                     Assert.AreEqual(NewSize, imageFactory.Image.Width);
                     Assert.AreEqual(NewSize, imageFactory.Image.Height);
                 }

src/ImageProcessor.UnitTests/ImageProcessor.UnitTests.csproj

@@ -51,6 +51,7 @@
     </Compile>
     <Compile Include="Extensions\DoubleExtensionsUnitTests.cs" />
     <Compile Include="Extensions\IntegerExtensionsUnitTests.cs" />
+    <Compile Include="Imaging\ColorUnitTests.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>

src/ImageProcessor.UnitTests/Imaging/ColorUnitTests.cs

@@ -0,0 +1,61 @@
+// --------------------------------------------------------------------------------------------------------------------
+// <copyright file="ColorUnitTests.cs" company="James South">
+//   Copyright (c) James South.
+//   Licensed under the Apache License, Version 2.0.
+// </copyright>
+// <summary>
+//   Test harness for the color classes.
+// </summary>
+// --------------------------------------------------------------------------------------------------------------------
+
+namespace ImageProcessor.UnitTests.Imaging
+{
+    using System.Drawing;
+    using ImageProcessor.Imaging.Colors;
+    using NUnit.Framework;
+
+    /// <summary>
+    /// Test harness for the color classes.
+    /// </summary>
+    [TestFixture]
+    public class ColorUnitTests
+    {
+        /// <summary>
+        /// Tests the <see cref="RGBAColor"/> struct equality operators.
+        /// </summary>
+        [Test]
+        public void TestRGBAEquality()
+        {
+            RGBAColor first = new RGBAColor(Color.White);
+            RGBAColor second = new RGBAColor(Color.White);
+
+            Assert.AreEqual(first, second);
+        }
+
+        /// <summary>
+        /// Tests the <see cref="RGBAColor"/> struct equality operators.
+        /// </summary>
+        [Test]
+        public void TestHSLAEquality()
+        {
+            HSLAColor first = new HSLAColor(Color.White);
+            HSLAColor second = new HSLAColor(Color.White);
+
+            Assert.AreEqual(first, second);
+        }
+
+        /// <summary>
+        /// Test conversion to and from a HSLA color.
+        /// </summary>
+        [Test]
+        public void TestHSLAConversion()
+        {
+            const string Hex = "#FEFFFE";
+
+            Color color = ColorTranslator.FromHtml(Hex);
+            HSLAColor hslaColor = new HSLAColor(color);
+            string outPut = ColorTranslator.ToHtml(hslaColor);
+            Assert.AreEqual(Hex, outPut);
+        }
+    }
+}

src/ImageProcessor/ImageFactory.cs

@@ -597,11 +597,11 @@ namespace ImageProcessor
         }
 
         /// <summary>
-        /// Changes the hue of the current image.
+        /// Alters the hue of the current image changing the overall color.
         /// </summary>
         /// <param name="degrees">
         /// The angle by which to alter the images hue.
-        /// Any integer between 0 and 359.
+        /// Any integer between 0 and 360.
         /// </param>
         /// <returns>
         /// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class.
@@ -623,6 +623,33 @@ namespace ImageProcessor
             return this;
         }
 
+        /// <summary>
+        /// Rotates the hue of the current image altering each color.
+        /// </summary>
+        /// <param name="degrees">
+        /// The angle by which to rotate the images hue.
+        /// Any integer between 0 and 360.
+        /// </param>
+        /// <returns>
+        /// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class.
+        /// </returns>
+        public ImageFactory HueRotate(int degrees)
+        {
+            // Sanitize the input.
+            if (degrees > 360 || degrees < 0)
+            {
+                degrees = 0;
+            }
+
+            if (this.ShouldProcess)
+            {
+                HueRotate hue = new HueRotate { DynamicParameter = degrees };
+                this.CurrentImageFormat.ApplyProcessor(hue.ProcessImage, this);
+            }
+
+            return this;
+        }
+
         /// <summary>
         /// Alters the output quality of the current image.
         /// <remarks>

src/ImageProcessor/ImageProcessor.csproj

@@ -121,6 +121,7 @@
     <Compile Include="Processors\Brightness.cs" />
     <Compile Include="Processors\Contrast.cs" />
     <Compile Include="Processors\GaussianSharpen.cs" />
+    <Compile Include="Processors\HueRotate.cs" />
     <Compile Include="Processors\Hue.cs" />
     <Compile Include="Processors\Meta.cs" />
     <Compile Include="Processors\RoundedCorners.cs" />

src/ImageProcessor/Imaging/Colors/HSLAColor.cs

@@ -12,6 +12,7 @@ namespace ImageProcessor.Imaging.Colors
 
     /// <summary>
     /// Represents an HSLA (hue, saturation, luminosity, alpha) color.
+    /// Adapted from <see href="http://richnewman.wordpress.com/about/code-listings-and-diagrams/hslcolor-class/"/>
     /// </summary>
     public struct HSLAColor
     {
@@ -21,235 +22,293 @@ namespace ImageProcessor.Imaging.Colors
         /// <summary>
         /// The hue component.
         /// </summary>
-        private double hue;
+        private double h;
 
         /// <summary>
         /// The luminosity component.
         /// </summary>
-        private double luminosity;
+        private double l;
 
         /// <summary>
         /// The saturation component.
         /// </summary>
-        private double saturation;
+        private double s;
 
         /// <summary>
         /// The alpha component.
         /// </summary>
         private double a;
 
-        #region Constructors and Destructors
-
         /// <summary>
         /// Initializes a new instance of the <see cref="HSLAColor"/> struct.
         /// </summary>
-        /// <param name="color">
-        /// The color.
+        /// <param name="hue">
+        /// The hue.
         /// </param>
-        public HSLAColor(Color color)
+        /// <param name="saturation">
+        /// The saturation.
+        /// </param>
+        /// <param name="luminosity">
+        /// The luminosity.
+        /// </param>
+        public HSLAColor(double hue, double saturation, double luminosity)
             : this()
         {
-            this.SetRGBA(color.R, color.G, color.B, color.A);
+            this.H = hue;
+            this.S = saturation;
+            this.L = luminosity;
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="HSLAColor"/> class.
+        /// Initializes a new instance of the <see cref="HSLAColor"/> struct.
         /// </summary>
-        /// <param name="red">
-        /// The red.
-        /// </param>
-        /// <param name="green">
-        /// The green.
-        /// </param>
-        /// <param name="blue">
-        /// The blue.
+        /// <param name="color">
+        /// The <see cref="System.Drawing.Color"/> to initialize from.
         /// </param>
-        public HSLAColor(int red, int green, int blue, int alpha)
+        public HSLAColor(Color color)
             : this()
         {
-            this.SetRGBA(red, green, blue, alpha);
+            HSLAColor hslColor = color;
+            this.h = hslColor.h;
+            this.s = hslColor.s;
+            this.l = hslColor.l;
+            this.a = hslColor.a;
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="HSLAColor"/> class.
+        /// Gets or sets the hue component.
         /// </summary>
-        /// <param name="hue">
-        /// The hue.
-        /// </param>
-        /// <param name="saturation">
-        /// The saturation.
-        /// </param>
-        /// <param name="luminosity">
-        /// The luminosity.
-        /// </param>
-        public HSLAColor(double hue, double saturation, double luminosity)
-            : this()
+        public double H
         {
-            this.Hue = hue;
-            this.Saturation = saturation;
-            this.Luminosity = luminosity;
-        }
-
-        #endregion
+            get
+            {
+                return this.h;
+            }
 
-        #region Public Properties
+            set
+            {
+                this.h = this.CheckRange(value);
+            }
+        }
 
         /// <summary>
-        /// Gets or sets the hue.
+        /// Gets or sets the luminosity component.
         /// </summary>
-        public double Hue
+        public double L
         {
             get
             {
-                return this.hue;
+                return this.l;
             }
 
             set
             {
-                this.hue = this.CheckRange(value);
+                this.l = this.CheckRange(value);
             }
         }
 
         /// <summary>
-        /// Gets or sets the luminosity.
+        /// Gets or sets the saturation component.
         /// </summary>
-        public double Luminosity
+        public double S
         {
             get
             {
-                return this.luminosity;
+                return this.s;
             }
 
             set
             {
-                this.luminosity = this.CheckRange(value);
+                this.s = this.CheckRange(value);
             }
         }
 
         /// <summary>
-        /// Gets or sets the saturation.
+        /// Gets or sets the alpha component.
         /// </summary>
-        public double Saturation
+        public double A
         {
             get
             {
-                return this.saturation;
+                return this.a;
             }
 
             set
             {
-                this.saturation = this.CheckRange(value);
+                this.a = this.CheckRange(value);
             }
         }
 
-        #endregion
+        /// <summary>
+        /// Allows the implicit conversion of an instance of <see cref="System.Drawing.Color"/> to a 
+        /// <see cref="HSLAColor"/>.
+        /// </summary>
+        /// <param name="color">
+        /// The instance of <see cref="System.Drawing.Color"/> to convert.
+        /// </param>
+        /// <returns>
+        /// An instance of <see cref="HSLAColor"/>.
+        /// </returns>
+        public static implicit operator HSLAColor(Color color)
+        {
+            HSLAColor hslColor = new HSLAColor
+            {
+                h = color.GetHue() / 360.0,
+                l = color.GetBrightness(),
+                s = color.GetSaturation(),
+                a = color.A / 255f
+            };
 
-        #region Public Methods and Operators
+            return hslColor;
+        }
 
         /// <summary>
-        /// The op_ implicit.
+        /// Allows the implicit conversion of an instance of <see cref="System.Drawing.Color"/> to a 
+        /// <see cref="HSLAColor"/>.
         /// </summary>
-        /// <param name="hslColor">
-        /// The hsl color.
+        /// <param name="rgbaColor">
+        /// The instance of <see cref="RGBAColor"/> to convert.
         /// </param>
         /// <returns>
+        /// An instance of <see cref="HSLAColor"/>.
         /// </returns>
-        public static implicit operator Color(HSLAColor hslColor)
+        public static implicit operator HSLAColor(RGBAColor rgbaColor)
+        {
+            Color color = rgbaColor;
+            HSLAColor hslColor = new HSLAColor
+            {
+                h = color.GetHue() / 360.0,
+                l = color.GetBrightness(),
+                s = color.GetSaturation(),
+                a = color.A / 255f
+            };
+
+            return hslColor;
+        }
+
+        /// <summary>
+        /// Allows the implicit conversion of an instance of <see cref="HSLAColor"/> to a 
+        /// <see cref="System.Drawing.Color"/>.
+        /// </summary>
+        /// <param name="hslaColor">
+        /// The instance of <see cref="HSLAColor"/> to convert.
+        /// </param>
+        /// <returns>
+        /// An instance of <see cref="System.Drawing.Color"/>.
+        /// </returns>
+        public static implicit operator Color(HSLAColor hslaColor)
         {
             double r = 0, g = 0, b = 0;
-            if (Math.Abs(hslColor.luminosity - 0) > .0001)
+            if (Math.Abs(hslaColor.l - 0) > .0001)
             {
-                if (Math.Abs(hslColor.saturation - 0) <= .0001)
+                if (Math.Abs(hslaColor.s - 0) <= .0001)
                 {
-                    r = g = b = hslColor.luminosity;
+                    r = g = b = hslaColor.l;
                 }
                 else
                 {
-                    double temp2 = GetTemp2(hslColor);
-                    double temp1 = (2.0 * hslColor.luminosity) - temp2;
+                    double temp2 = GetTemp2(hslaColor);
+                    double temp1 = (2.0 * hslaColor.l) - temp2;
 
-                    r = GetColorComponent(temp1, temp2, hslColor.hue + (1.0 / 3.0));
-                    g = GetColorComponent(temp1, temp2, hslColor.hue);
-                    b = GetColorComponent(temp1, temp2, hslColor.hue - (1.0 / 3.0));
+                    r = GetColorComponent(temp1, temp2, hslaColor.h + (1.0 / 3.0));
+                    g = GetColorComponent(temp1, temp2, hslaColor.h);
+                    b = GetColorComponent(temp1, temp2, hslaColor.h - (1.0 / 3.0));
                 }
             }
 
-            return Color.FromArgb((int)(255 * r), (int)(255 * g), (int)(255 * b));
+            return Color.FromArgb(Convert.ToInt32(255 * hslaColor.a), Convert.ToInt32(255 * r), Convert.ToInt32(255 * g), Convert.ToInt32(255 * b));
         }
 
         /// <summary>
-        /// The op_ implicit.
+        /// Allows the implicit conversion of an instance of <see cref="HSLAColor"/> to a 
+        /// <see cref="RGBAColor"/>.
         /// </summary>
-        /// <param name="color">
-        /// The color.
+        /// <param name="hslaColor">
+        /// The instance of <see cref="HSLAColor"/> to convert.
         /// </param>
         /// <returns>
+        /// An instance of <see cref="RGBAColor"/>.
         /// </returns>
-        public static implicit operator HSLAColor(Color color)
+        public static implicit operator RGBAColor(HSLAColor hslaColor)
         {
-            HSLAColor hslColor = new HSLAColor
+            double r = 0, g = 0, b = 0;
+            if (Math.Abs(hslaColor.l - 0) > .0001)
             {
-                hue = color.GetHue() / 360.0,
-                luminosity = color.GetBrightness(),
-                saturation = color.GetSaturation()
-            };
+                if (Math.Abs(hslaColor.s - 0) <= .0001)
+                {
+                    r = g = b = hslaColor.l;
+                }
+                else
+                {
+                    double temp2 = GetTemp2(hslaColor);
+                    double temp1 = (2.0 * hslaColor.l) - temp2;
 
-            return hslColor;
+                    r = GetColorComponent(temp1, temp2, hslaColor.h + (1.0 / 3.0));
+                    g = GetColorComponent(temp1, temp2, hslaColor.h);
+                    b = GetColorComponent(temp1, temp2, hslaColor.h - (1.0 / 3.0));
+                }
+            }
+
+            return new RGBAColor(Convert.ToByte(255 * r), Convert.ToByte(255 * g), Convert.ToByte(255 * b), Convert.ToByte(255 * hslaColor.a));
         }
 
         /// <summary>
-        /// The set rgb components.
+        /// Returns a <see cref="System.String" /> that represents this instance.
         /// </summary>
-        /// <param name="red">
-        /// The red.
-        /// </param>
-        /// <param name="green">
-        /// The green component.
-        /// </param>
-        /// <param name="blue">
-        /// The blue component.
-        /// </param>
-        /// <param name="alpha">
-        /// The alpha component.
-        /// </param>
-        public void SetRGBA(int red, int green, int blue, int alpha)
+        /// <returns>
+        /// A <see cref="System.String" /> that represents this instance.
+        /// </returns>
+        public string ToRGBAString()
         {
-            HSLAColor hslColor = Color.FromArgb(alpha, red, green, blue);
-            this.hue = hslColor.hue;
-            this.saturation = hslColor.saturation;
-            this.luminosity = hslColor.luminosity;
-            this.a = hslColor.a;
+            Color color = this;
+            return string.Format("R={0}, G={1}, B={2}, A={3}", color.R, color.G, color.B, color.A);
         }
 
         /// <summary>
-        /// The to rgb string.
+        /// Returns a <see cref="System.String" /> that represents this instance.
         /// </summary>
         /// <returns>
-        /// The <see cref="string"/>.
+        /// A <see cref="System.String" /> that represents this instance.
         /// </returns>
-        public string ToRGBString()
+        public override string ToString()
         {
-            Color color = this;
-            return string.Format("R: {0:#0.##} G: {1:#0.##} B: {2:#0.##}", color.R, color.G, color.B);
+            return string.Format("H={0:#0.##}, S={1:#0.##}, L={2:#0.##}, A={3:#0.##}", this.H, this.S, this.L, this.A);
         }
 
         /// <summary>
-        /// The to string.
+        /// Indicates whether this instance and a specified object are equal.
         /// </summary>
         /// <returns>
-        /// The <see cref="string"/>.
+        /// true if <paramref name="obj"/> and this instance are the same type and represent the same value; otherwise, false.
         /// </returns>
-        public override string ToString()
+        /// <param name="obj">Another object to compare to. </param>
+        public override bool Equals(object obj)
         {
-            return string.Format("H: {0:#0.##} S: {1:#0.##} L: {2:#0.##}", this.Hue, this.Saturation, this.Luminosity);
-        }
+            if (obj is HSLAColor)
+            {
+                Color thisColor = this;
+                Color otherColor = (HSLAColor)obj;
+
+                return thisColor.Equals(otherColor);
+            }
 
-        #endregion
+            return false;
+        }
 
-        #region Methods
+        /// <summary>
+        /// Returns the hash code for this instance.
+        /// </summary>
+        /// <returns>
+        /// A 32-bit signed integer that is the hash code for this instance.
+        /// </returns>
+        public override int GetHashCode()
+        {
+            Color thisColor = this;
+            return thisColor.GetHashCode();
+        }
 
         /// <summary>
-        /// The get color component.
+        /// Gets the color component from the given hue values.
         /// </summary>
         /// <param name="temp1">
         /// The temp 1.
@@ -288,7 +347,7 @@ namespace ImageProcessor.Imaging.Colors
         /// The get temp 2.
         /// </summary>
         /// <param name="hslColor">
-        /// The hsl color.
+        /// The <see cref="HSLAColor"/> color.
         /// </param>
         /// <returns>
         /// The <see cref="double"/>.
@@ -296,13 +355,13 @@ namespace ImageProcessor.Imaging.Colors
         private static double GetTemp2(HSLAColor hslColor)
         {
             double temp2;
-            if (hslColor.luminosity <= 0.5)
+            if (hslColor.l <= 0.5)
             {
-                temp2 = hslColor.luminosity * (1.0 + hslColor.saturation);
+                temp2 = hslColor.l * (1.0 + hslColor.s);
             }
             else
             {
-                temp2 = hslColor.luminosity + hslColor.saturation - (hslColor.luminosity * hslColor.saturation);
+                temp2 = hslColor.l + hslColor.s - (hslColor.l * hslColor.s);
             }
 
             return temp2;
@@ -332,13 +391,13 @@ namespace ImageProcessor.Imaging.Colors
         }
 
         /// <summary>
-        /// The check range.
+        /// Checks the range of the given value to ensure that it remains within the acceptable boundaries.
         /// </summary>
         /// <param name="value">
-        /// The value.
+        /// The value to check.
         /// </param>
         /// <returns>
-        /// The <see cref="double"/>.
+        /// The sanitized <see cref="double"/>.
         /// </returns>
         private double CheckRange(double value)
         {
@@ -353,7 +412,5 @@ namespace ImageProcessor.Imaging.Colors
 
             return value;
         }
-
-        #endregion
     }
 }

src/ImageProcessor/Imaging/Colors/RGBAColor.cs

@@ -8,6 +8,7 @@
 namespace ImageProcessor.Imaging.Colors
 {
     using System.Drawing;
+    using System.Text;
 
     /// <summary>
     /// Represents an RGBA (red, green, blue, alpha) color.
@@ -91,6 +92,36 @@ namespace ImageProcessor.Imaging.Colors
             this.A = color.A;
         }
 
+        /// <summary>
+        /// Allows the implicit conversion of an instance of <see cref="System.Drawing.Color"/> to a 
+        /// <see cref="RGBAColor"/>.
+        /// </summary>
+        /// <param name="color">
+        /// The instance of <see cref="System.Drawing.Color"/> to convert.
+        /// </param>
+        /// <returns>
+        /// An instance of <see cref="RGBAColor"/>.
+        /// </returns>
+        public static implicit operator RGBAColor(Color color)
+        {
+            return new RGBAColor(color);
+        }
+
+        /// <summary>
+        /// Allows the implicit conversion of an instance of <see cref="System.Drawing.Color"/> to a 
+        /// <see cref="RGBAColor"/>.
+        /// </summary>
+        /// <param name="color">
+        /// The instance of <see cref="System.Drawing.Color"/> to convert.
+        /// </param>
+        /// <returns>
+        /// An instance of <see cref="RGBAColor"/>.
+        /// </returns>
+        public static implicit operator RGBAColor(HSLAColor color)
+        {
+            return new RGBAColor(color);
+        }
+
         /// <summary>
         /// Allows the implicit conversion of an instance of <see cref="RGBAColor"/> to a 
         /// <see cref="System.Drawing.Color"/>.
@@ -103,7 +134,65 @@ namespace ImageProcessor.Imaging.Colors
         /// </returns>
         public static implicit operator Color(RGBAColor rgba)
         {
-            return System.Drawing.Color.FromArgb(rgba.A, rgba.R, rgba.G, rgba.B);
+            return Color.FromArgb(rgba.A, rgba.R, rgba.G, rgba.B);
+        }
+
+        /// <summary>
+        /// Allows the implicit conversion of an instance of <see cref="RGBAColor"/> to a 
+        /// <see cref="HSLAColor"/>.
+        /// </summary>
+        /// <param name="rgba">
+        /// The instance of <see cref="RGBAColor"/> to convert.
+        /// </param>
+        /// <returns>
+        /// An instance of <see cref="HSLAColor"/>.
+        /// </returns>
+        public static implicit operator HSLAColor(RGBAColor rgba)
+        {
+            return new HSLAColor(rgba);
+        }
+
+        /// <summary>
+        /// Returns a <see cref="System.String" /> that represents this instance.
+        /// </summary>
+        /// <returns>
+        /// A <see cref="System.String" /> that represents this instance.
+        /// </returns>
+        public override string ToString()
+        {
+            return string.Format("R={0}, G={1}, B={2}, A={3}", this.R, this.G, this.B, this.A);
+        }
+
+        /// <summary>
+        /// Indicates whether this instance and a specified object are equal.
+        /// </summary>
+        /// <returns>
+        /// true if <paramref name="obj"/> and this instance are the same type and represent the same value; otherwise, false.
+        /// </returns>
+        /// <param name="obj">Another object to compare to. </param>
+        public override bool Equals(object obj)
+        {
+            if (obj is RGBAColor)
+            {
+                Color thisColor = this;
+                Color otherColor = (RGBAColor)obj;
+
+                return thisColor.Equals(otherColor);
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Returns the hash code for this instance.
+        /// </summary>
+        /// <returns>
+        /// A 32-bit signed integer that is the hash code for this instance.
+        /// </returns>
+        public override int GetHashCode()
+        {
+            Color thisColor = this;
+            return thisColor.GetHashCode();
         }
     }
 }

src/ImageProcessor/Processors/Hue.cs

@@ -18,7 +18,7 @@ namespace ImageProcessor.Processors
     using ImageProcessor.Imaging.Colors;
 
     /// <summary>
-    /// Encapsulates methods to rotate the hue component of an image.
+    /// Encapsulates methods to adjust the hue component of an image.
     /// </summary>
     public class Hue : IGraphicsProcessor
     {
@@ -69,10 +69,8 @@ namespace ImageProcessor.Processors
                     {
                         for (int j = 0; j < height; j++)
                         {
-                            HSLAColor hsl = new HSLAColor(fastBitmap.GetPixel(i, j));
-                            hsl.Hue = (hsl.Hue + (degrees / 360f)) % 1;
-                            //hsl.Hue = (degrees / 360f);
-                            fastBitmap.SetPixel(i, j, hsl);
+                            HSLAColor hsla = new HSLAColor(fastBitmap.GetPixel(i, j)) { H = degrees / 360f };
+                            fastBitmap.SetPixel(i, j, hsla);
                         }
                     }
                 }

src/ImageProcessor/Processors/HueRotate.cs

@@ -0,0 +1,95 @@
+// --------------------------------------------------------------------------------------------------------------------
+// <copyright file="HueRotate.cs" company="James South">
+//   Copyright (c) James South.
+//   Licensed under the Apache License, Version 2.0.
+// </copyright>
+// <summary>
+//   Encapsulates methods to rotate the hue component of an image.
+// </summary>
+// --------------------------------------------------------------------------------------------------------------------
+
+namespace ImageProcessor.Processors
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Drawing;
+    using ImageProcessor.Common.Exceptions;
+    using ImageProcessor.Imaging;
+    using ImageProcessor.Imaging.Colors;
+
+    /// <summary>
+    /// Encapsulates methods to rotate the hue component of an image.
+    /// </summary>
+    public class HueRotate : IGraphicsProcessor
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="HueRotate"/> class.
+        /// </summary>
+        public HueRotate()
+        {
+            this.Settings = new Dictionary<string, string>();
+        }
+
+        /// <summary>
+        /// Gets or sets the dynamic parameter.
+        /// </summary>
+        public dynamic DynamicParameter { get; set; }
+
+        /// <summary>
+        /// Gets or sets any additional settings required by the processor.
+        /// </summary>
+        public Dictionary<string, string> Settings { get; set; }
+
+        /// <summary>
+        /// Processes the image.
+        /// </summary>
+        /// <param name="factory">
+        /// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class containing
+        /// the image to process.
+        /// </param>
+        /// <returns>
+        /// The processed image from the current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class.
+        /// </returns>
+        public Image ProcessImage(ImageFactory factory)
+        {
+            Bitmap newImage = null;
+            Image image = factory.Image;
+
+            try
+            {
+                int degrees = this.DynamicParameter;
+                int width = image.Width;
+                int height = image.Height;
+
+                newImage = new Bitmap(image);
+
+                using (FastBitmap fastBitmap = new FastBitmap(newImage))
+                {
+                    for (int i = 0; i < width; i++)
+                    {
+                        for (int j = 0; j < height; j++)
+                        {
+                            HSLAColor hsla = new HSLAColor(fastBitmap.GetPixel(i, j));
+                            hsla.H = (hsla.H + (degrees / 360f)) % 1;
+                            fastBitmap.SetPixel(i, j, hsla);
+                        }
+                    }
+                }
+
+                image.Dispose();
+                image = newImage;
+            }
+            catch (Exception ex)
+            {
+                if (newImage != null)
+                {
+                    newImage.Dispose();
+                }
+
+                throw new ImageProcessingException("Error processing image with " + this.GetType().Name, ex);
+            }
+
+            return image;
+        }
+    }
+}

src/ImageProcessorConsole/Program.cs

@@ -82,7 +82,8 @@ namespace ImageProcessorConsole
                             //.Resize(new Size((int)(size.Width * 1.1), 0))
                             //.ContentAwareResize(layer)
                             .Constrain(size)
-                            .Hue(180)
+                            .HueRotate(270)
+                            .Quality(100)
                             .Save(Path.GetFullPath(Path.Combine(Path.GetDirectoryName(path), @"..\..\images\output", fileInfo.Name)));
 
                         stopwatch.Stop();

src/ImageProcessorConsole/images/output/2008.jpg.REMOVED.git-id

@@ -1 +0,0 @@
-73753ca19a0818ee4a88b6e9e0eb85ca17624269

src/ImageProcessorConsole/images/output/Arc-de-Triomphe-France.jpg.REMOVED.git-id

@@ -1 +0,0 @@
-dff097307936637d1c43f82ca28f4582c9810de7