Use Color32 structure.

Former-commit-id: 7766fb32652db5587004bea4da2f9abbc0af17a6
Former-commit-id: c7a35226816f4229d69cfe7571e9653932f9b6f1

src/ImageProcessor.Playground/Program.cs

@@ -94,7 +94,7 @@ namespace ImageProcessor.PlayGround
                             //.EntropyCrop()
                             //.Filter(MatrixFilters.Invert)
                             //.Contrast(50)
-                            .Filter(MatrixFilters.Comic)
+                            //.Filter(MatrixFilters.Comic)
                             //.Flip()
                             //.Filter(MatrixFilters.HiSatch)
                             //.Pixelate(8)

src/ImageProcessor/ImageProcessor.csproj

@@ -182,6 +182,7 @@
     <Compile Include="Imaging\Formats\GifFrame.cs" />
     <Compile Include="Imaging\Helpers\Adjustments.cs" />
     <Compile Include="Imaging\Helpers\Effects.cs" />
+    <Compile Include="Imaging\Quantizers\IQuantizer.cs" />
     <Compile Include="Imaging\Quantizers\OctreeQuantizer.cs" />
     <Compile Include="Imaging\Quantizers\Quantizer.cs" />
     <Compile Include="Imaging\Quantizers\WuQuantizer\Box.cs" />
@@ -192,9 +193,6 @@
     <Compile Include="Imaging\Quantizers\WuQuantizer\CubeCut.cs" />
     <Compile Include="Imaging\Quantizers\WuQuantizer\ImageBuffer.cs" />
     <Compile Include="Imaging\Quantizers\WuQuantizer\IWuQuantizer.cs" />
-    <Compile Include="Imaging\Quantizers\WuQuantizer\Pixel.cs">
-      <SubType>Code</SubType>
-    </Compile>
     <Compile Include="Common\Exceptions\QuantizationException.cs" />
     <Compile Include="Imaging\Quantizers\WuQuantizer\WuQuantizer.cs" />
     <Compile Include="Imaging\Quantizers\WuQuantizer\WuQuantizerBase.cs" />

src/ImageProcessor/Imaging/Colors/Color32.cs

@@ -76,6 +76,9 @@ namespace ImageProcessor.Imaging.Colors
             this.R = red;
             this.G = green;
             this.B = blue;
+
+            // Stolen from Color.
+            this.Argb = (int)(((uint)((((red << 0x10) | (green << 8)) | blue) | (alpha << 0x18))) & 0xffffffffL);
         }
 
         /// <summary>

src/ImageProcessor/Imaging/Formats/PngFormat.cs

@@ -14,7 +14,6 @@ namespace ImageProcessor.Imaging.Formats
     using System.Drawing.Imaging;
     using System.IO;
 
-    using ImageProcessor.Imaging.Quantizers;
     using ImageProcessor.Imaging.Quantizers.WuQuantizer;
 
     /// <summary>
@@ -80,7 +79,7 @@ namespace ImageProcessor.Imaging.Formats
         {
             if (this.IsIndexed)
             {
-                image = new OctreeQuantizer(255, 8).Quantize(image);
+                image = new WuQuantizer().Quantize(image);
             }
 
             return base.Save(stream, image);
@@ -99,28 +98,7 @@ namespace ImageProcessor.Imaging.Formats
         {
             if (this.IsIndexed)
             {
-                // The Wu Quantizer expects a 32bbp image.
-                //if (Image.GetPixelFormatSize(image.PixelFormat) != 32)
-                //{
-                    Bitmap clone = new Bitmap(image.Width, image.Height, PixelFormat.Format32bppPArgb);
-                    clone.SetResolution(image.HorizontalResolution, image.VerticalResolution);
-
-                    using (Graphics graphics = Graphics.FromImage(clone))
-                    {
-                        graphics.Clear(Color.Transparent);
-                        graphics.DrawImage(image, new Rectangle(0, 0, clone.Width, clone.Height));
-                    }
-
-                    image.Dispose();
-
-                    image = new WuQuantizer().QuantizeImage(clone);
-
-                    // image = new OctreeQuantizer(255, 8).Quantize(image);
-                //}
-                //else
-                //{
-                //    image = new WuQuantizer().QuantizeImage((Bitmap)image);
-                //}
+                image = new WuQuantizer().Quantize(image);
             }
 
             return base.Save(path, image);

src/ImageProcessor/Imaging/Quantizers/WuQuantizer/ColorMoment.cs

@@ -11,6 +11,8 @@
 
 namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
 {
+    using ImageProcessor.Imaging.Colors;
+
     /// <summary>
     /// The cumulative color moment for holding pixel information.
     /// Adapted from <see href="https://github.com/drewnoakes" />
@@ -119,12 +121,12 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
         /// <param name="pixel">
         /// The pixel to add.
         /// </param>
-        public void Add(Pixel pixel)
+        public void Add(Color32 pixel)
         {
-            byte alpha = pixel.Alpha;
-            byte red = pixel.Red;
-            byte green = pixel.Green;
-            byte blue = pixel.Blue;
+            byte alpha = pixel.A;
+            byte red = pixel.R;
+            byte green = pixel.G;
+            byte blue = pixel.B;
             this.Alpha += alpha;
             this.Red += red;
             this.Green += green;

src/ImageProcessor/Imaging/Quantizers/WuQuantizer/ImageBuffer.cs

@@ -18,6 +18,7 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
     using System.Runtime.InteropServices;
 
     using ImageProcessor.Common.Exceptions;
+    using ImageProcessor.Imaging.Colors;
 
     /// <summary>
     /// The image buffer for storing and manipulating pixel information.
@@ -47,13 +48,13 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
         /// <exception cref="QuantizationException">
         /// Thrown if the given image is not a 32 bit per pixel image.
         /// </exception>
-        public IEnumerable<Pixel[]> PixelLines
+        public IEnumerable<Color32[]> PixelLines
         {
             get
             {
                 int width = this.Image.Width;
                 int height = this.Image.Height;
-                Pixel[] pixels = new Pixel[width];
+                Color32[] pixels = new Color32[width];
 
                 using (FastBitmap bitmap = new FastBitmap(this.Image))
                 {
@@ -62,7 +63,7 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
                         for (int x = 0; x < width; x++)
                         {
                             Color color = bitmap.GetPixel(x, y);
-                            pixels[x] = new Pixel(color.A, color.R, color.G, color.B);
+                            pixels[x] = new Color32(color.A, color.R, color.G, color.B);
                         }
 
                         yield return pixels;

src/ImageProcessor/Imaging/Quantizers/WuQuantizer/PaletteColorHistory.cs

@@ -13,6 +13,8 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
 {
     using System.Drawing;
 
+    using ImageProcessor.Imaging.Colors;
+
     /// <summary>
     /// The palette color history containing the sum of all pixel data.
     /// Adapted from <see href="https://github.com/drewnoakes" />
@@ -61,12 +63,12 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
         /// <param name="pixel">
         /// The pixel to add.
         /// </param>
-        public void AddPixel(Pixel pixel)
+        public void AddPixel(Color32 pixel)
         {
-            this.Alpha += pixel.Alpha;
-            this.Red += pixel.Red;
-            this.Green += pixel.Green;
-            this.Blue += pixel.Blue;
+            this.Alpha += pixel.A;
+            this.Red += pixel.R;
+            this.Green += pixel.G;
+            this.Blue += pixel.B;
             this.Sum++;
         }
     }

src/ImageProcessor/Imaging/Quantizers/WuQuantizer/PaletteLookup.cs

@@ -15,6 +15,8 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
     using System.Collections.Generic;
     using System.Linq;
 
+    using ImageProcessor.Imaging.Colors;
+
     /// <summary>
     /// Stores the indexed color palette of an image for fast access.
     /// Adapted from <see href="https://github.com/drewnoakes" />
@@ -37,14 +39,14 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
         /// <param name="palette">
         /// The palette.
         /// </param>
-        public PaletteLookup(Pixel[] palette)
+        public PaletteLookup(Color32[] palette)
         {
             this.Palette = new LookupNode[palette.Length];
             for (int paletteIndex = 0; paletteIndex < palette.Length; paletteIndex++)
             {
                 this.Palette[paletteIndex] = new LookupNode
                 {
-                    Pixel = palette[paletteIndex], 
+                    Color32 = palette[paletteIndex],
                     PaletteIndex = (byte)paletteIndex
                 };
             }
@@ -66,7 +68,7 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
         /// <returns>
         /// The <see cref="byte"/> representing the index.
         /// </returns>
-        public byte GetPaletteIndex(Pixel pixel)
+        public byte GetPaletteIndex(Color32 pixel)
         {
             int pixelKey = pixel.Argb & this.paletteMask;
             LookupNode[] bucket;
@@ -84,18 +86,18 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
             byte bestMatch = 0;
             foreach (LookupNode lookup in bucket)
             {
-                Pixel lookupPixel = lookup.Pixel;
+                Color32 lookupPixel = lookup.Color32;
 
-                int deltaAlpha = pixel.Alpha - lookupPixel.Alpha;
+                int deltaAlpha = pixel.A - lookupPixel.A;
                 int distance = deltaAlpha * deltaAlpha;
 
-                int deltaRed = pixel.Red - lookupPixel.Red;
+                int deltaRed = pixel.R - lookupPixel.R;
                 distance += deltaRed * deltaRed;
 
-                int deltaGreen = pixel.Green - lookupPixel.Green;
+                int deltaGreen = pixel.G - lookupPixel.G;
                 distance += deltaGreen * deltaGreen;
 
-                int deltaBlue = pixel.Blue - lookupPixel.Blue;
+                int deltaBlue = pixel.B - lookupPixel.B;
                 distance += deltaBlue * deltaBlue;
 
                 if (distance >= bestDistance)
@@ -159,21 +161,21 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
         /// <returns>
         /// The <see cref="int"/> representing the component value of the mask.
         /// </returns>
-        private static int GetMask(Pixel[] palette)
+        private static int GetMask(Color32[] palette)
         {
-            IEnumerable<byte> alphas = palette.Select(p => p.Alpha).ToArray();
+            IEnumerable<byte> alphas = palette.Select(p => p.A).ToArray();
             byte maxAlpha = alphas.Max();
             int uniqueAlphas = alphas.Distinct().Count();
 
-            IEnumerable<byte> reds = palette.Select(p => p.Red).ToArray();
+            IEnumerable<byte> reds = palette.Select(p => p.R).ToArray();
             byte maxRed = reds.Max();
             int uniqueReds = reds.Distinct().Count();
 
-            IEnumerable<byte> greens = palette.Select(p => p.Green).ToArray();
+            IEnumerable<byte> greens = palette.Select(p => p.G).ToArray();
             byte maxGreen = greens.Max();
             int uniqueGreens = greens.Distinct().Count();
 
-            IEnumerable<byte> blues = palette.Select(p => p.Green).ToArray();
+            IEnumerable<byte> blues = palette.Select(p => p.B).ToArray();
             byte maxBlue = blues.Max();
             int uniqueBlues = blues.Distinct().Count();
 
@@ -186,7 +188,7 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
             byte greenMask = ComputeBitMask(maxGreen, Convert.ToInt32(Math.Round(uniqueGreens / totalUniques * availableBits)));
             byte blueMask = ComputeBitMask(maxBlue, Convert.ToInt32(Math.Round(uniqueBlues / totalUniques * availableBits)));
 
-            Pixel maskedPixel = new Pixel(alphaMask, redMask, greenMask, blueMask);
+            Color32 maskedPixel = new Color32(alphaMask, redMask, greenMask, blueMask);
             return maskedPixel.Argb;
         }
 
@@ -221,13 +223,13 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
         /// <param name="palette">
         /// The palette.
         /// </param>
-        private void BuildLookup(Pixel[] palette)
+        private void BuildLookup(Color32[] palette)
         {
             int mask = GetMask(palette);
             Dictionary<int, List<LookupNode>> tempLookup = new Dictionary<int, List<LookupNode>>();
             foreach (LookupNode lookup in this.Palette)
             {
-                int pixelKey = lookup.Pixel.Argb & mask;
+                int pixelKey = lookup.Color32.Argb & mask;
 
                 List<LookupNode> bucket;
                 if (!tempLookup.TryGetValue(pixelKey, out bucket))
@@ -261,7 +263,7 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
             /// <summary>
             /// The pixel.
             /// </summary>
-            public Pixel Pixel;
+            public Color32 Color32;
         }
     }
 }

src/ImageProcessor/Imaging/Quantizers/WuQuantizer/Pixel.cs

@@ -1,104 +0,0 @@
-// --------------------------------------------------------------------------------------------------------------------
-// <copyright file="Pixel.cs" company="James South">
-//   Copyright (c) James South.
-//   Licensed under the Apache License, Version 2.0.
-// </copyright>
-// --------------------------------------------------------------------------------------------------------------------
-
-
-
-using System.Diagnostics;
-using System.Runtime.InteropServices;
-
-namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
-{
-    /// <summary>
-    /// The pixel.
-    /// </summary>
-    [StructLayout(LayoutKind.Explicit)]
-    public struct Pixel
-    {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="Pixel"/> struct.
-        /// </summary>
-        /// <param name="alpha">
-        /// The alpha.
-        /// </param>
-        /// <param name="red">
-        /// The red.
-        /// </param>
-        /// <param name="green">
-        /// The green.
-        /// </param>
-        /// <param name="blue">
-        /// The blue.
-        /// </param>
-        public Pixel(byte alpha, byte red, byte green, byte blue)
-            : this()
-        {
-            Alpha = alpha;
-            Red = red;
-            Green = green;
-            Blue = blue;
-
-            Debug.Assert(Argb == (alpha << 24 | red << 16 | green << 8 | blue));
-        }
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="Pixel"/> struct.
-        /// </summary>
-        /// <param name="argb">
-        /// The argb.
-        /// </param>
-        public Pixel(int argb)
-            : this()
-        {
-            Argb = argb;
-            Debug.Assert(Alpha == ((uint)argb >> 24));
-            Debug.Assert(Red == ((uint)(argb >> 16) & 255));
-            Debug.Assert(Green == ((uint)(argb >> 8) & 255));
-            Debug.Assert(Blue == ((uint)argb & 255));
-        }
-
-        /// <summary>
-        /// The alpha.
-        /// </summary>
-        [FieldOffset(3)]
-        public byte Alpha;
-
-        /// <summary>
-        /// The red.
-        /// </summary>
-        [FieldOffset(2)]
-        public byte Red;
-
-        /// <summary>
-        /// The green.
-        /// </summary>
-        [FieldOffset(1)]
-        public byte Green;
-
-        /// <summary>
-        /// The blue.
-        /// </summary>
-        [FieldOffset(0)]
-        public byte Blue;
-
-        /// <summary>
-        /// The argb.
-        /// </summary>
-        [FieldOffset(0)]
-        public int Argb;
-
-        /// <summary>
-        /// The to string.
-        /// </summary>
-        /// <returns>
-        /// The <see cref="string"/>.
-        /// </returns>
-        public override string ToString()
-        {
-            return string.Format("Alpha:{0} Red:{1} Green:{2} Blue:{3}", Alpha, Red, Green, Blue);
-        }
-    }
-}

src/ImageProcessor/Imaging/Quantizers/WuQuantizer/WuQuantizer.cs

@@ -16,6 +16,8 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
     using System.Drawing;
     using System.Drawing.Imaging;
 
+    using ImageProcessor.Imaging.Colors;
+
     /// <summary>
     /// Encapsulates methods to calculate the color palette of an image using 
     /// a Wu color quantizer <see href="http://www.ece.mcmaster.ca/~xwu/cq.c"/>.
@@ -33,7 +35,7 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
         /// The maximum number of colors apply to the image.
         /// </param>
         /// <param name="lookups">
-        /// The array of <see cref="Pixel"/> containing indexed versions of the images colors.
+        /// The array of <see cref="Color32"/> containing indexed versions of the images colors.
         /// </param>
         /// <param name="alphaThreshold">
         /// All colors with an alpha value less than this will be considered fully transparent.
@@ -41,7 +43,7 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
         /// <returns>
         /// The quantized <see cref="Bitmap"/>.
         /// </returns>
-        internal override Bitmap GetQuantizedImage(ImageBuffer imageBuffer, int colorCount, Pixel[] lookups, int alphaThreshold)
+        internal override Bitmap GetQuantizedImage(ImageBuffer imageBuffer, int colorCount, Color32[] lookups, int alphaThreshold)
         {
             Bitmap result = new Bitmap(imageBuffer.Image.Width, imageBuffer.Image.Height, PixelFormat.Format8bppIndexed);
             result.SetResolution(imageBuffer.Image.HorizontalResolution, imageBuffer.Image.VerticalResolution);
@@ -82,7 +84,7 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
         /// The <see cref="ImageBuffer"/> for storing and manipulating pixel information.
         /// </param>
         /// <param name="lookups">
-        /// The array of <see cref="Pixel"/> containing indexed versions of the images colors.
+        /// The array of <see cref="Color32"/> containing indexed versions of the images colors.
         /// </param>
         /// <param name="alphaThreshold">
         /// The alpha threshold.
@@ -93,21 +95,21 @@ namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
         /// <returns>
         /// The enumerable list of <see cref="byte"/> representing each pixel.
         /// </returns>
-        private static IEnumerable<byte[]> IndexedPixels(ImageBuffer image, Pixel[] lookups, int alphaThreshold, PaletteColorHistory[] paletteHistogram)
+        private static IEnumerable<byte[]> IndexedPixels(ImageBuffer image, Color32[] lookups, int alphaThreshold, PaletteColorHistory[] paletteHistogram)
         {
             byte[] lineIndexes = new byte[image.Image.Width];
             PaletteLookup lookup = new PaletteLookup(lookups);
 
             // Determine the correct fallback color.
             byte fallback = lookups.Length < AlphaMax ? AlphaMin : AlphaMax;
-            foreach (Pixel[] pixelLine in image.PixelLines)
+            foreach (Color32[] pixelLine in image.PixelLines)
             {
                 int length = pixelLine.Length;
                 for (int i = 0; i < length; i++)
                 {
-                    Pixel pixel = pixelLine[i];
+                    Color32 pixel = pixelLine[i];
                     byte bestMatch = fallback;
-                    if (pixel.Alpha > alphaThreshold)
+                    if (pixel.A > alphaThreshold)
                     {
                         bestMatch = lookup.GetPaletteIndex(pixel);
                         paletteHistogram[bestMatch].AddPixel(pixel);

src/ImageProcessor/Imaging/Quantizers/WuQuantizer/WuQuantizerBase.cs

@@ -1,4 +1,16 @@
-namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
+// --------------------------------------------------------------------------------------------------------------------
+// <copyright file="WuQuantizerBase.cs" company="James South">
+//   Copyright (c) James South.
+//   Licensed under the Apache License, Version 2.0.
+// </copyright>
+// <summary>
+//   Encapsulates methods to calculate the color palette of an image using
+//   a Wu color quantizer <see href="http://www.ece.mcmaster.ca/~xwu/cq.c" />.
+//   Adapted from <see href="https://github.com/drewnoakes" />
+// </summary>
+// --------------------------------------------------------------------------------------------------------------------
+
+namespace ImageProcessor.Imaging.Quantizers.WuQuantizer
 {
     using System;
     using System.Diagnostics.CodeAnalysis;
@@ -7,6 +19,7 @@
     using System.Linq;
 
     using ImageProcessor.Common.Exceptions;
+    using ImageProcessor.Imaging.Colors;
 
     /// <summary>
     /// Encapsulates methods to calculate the color palette of an image using 
@@ -148,7 +161,7 @@
                 BuildHistogram(histogram, buffer, alphaThreshold, alphaFader);
                 CalculateMoments(histogram.Moments);
                 Box[] cubes = SplitData(ref maxColors, histogram.Moments);
-                Pixel[] lookups = BuildLookups(cubes, histogram.Moments);
+                Color32[] lookups = BuildLookups(cubes, histogram.Moments);
                 return this.GetQuantizedImage(buffer, maxColors, lookups, alphaThreshold);
             }
             catch (Exception ex)
@@ -167,7 +180,7 @@
         /// The maximum number of colors apply to the image.
         /// </param>
         /// <param name="lookups">
-        /// The array of <see cref="Pixel"/> containing indexed versions of the images colors.
+        /// The array of <see cref="Color32"/> containing indexed versions of the images colors.
         /// </param>
         /// <param name="alphaThreshold">
         /// All colors with an alpha value less than this will be considered fully transparent.
@@ -175,7 +188,7 @@
         /// <returns>
         /// The quantized <see cref="Bitmap"/>.
         /// </returns>
-        internal abstract Bitmap GetQuantizedImage(ImageBuffer imageBuffer, int colorCount, Pixel[] lookups, int alphaThreshold);
+        internal abstract Bitmap GetQuantizedImage(ImageBuffer imageBuffer, int colorCount, Color32[] lookups, int alphaThreshold);
 
         /// <summary>
         /// Builds a histogram from the current image.
@@ -197,22 +210,22 @@
         {
             ColorMoment[, , ,] moments = histogram.Moments;
 
-            foreach (Pixel[] pixelLine in imageBuffer.PixelLines)
+            foreach (Color32[] pixelLine in imageBuffer.PixelLines)
             {
-                foreach (Pixel pixel in pixelLine)
+                foreach (Color32 pixel in pixelLine)
                 {
-                    byte pixelAlpha = pixel.Alpha;
+                    byte pixelAlpha = pixel.A;
                     if (pixelAlpha > alphaThreshold)
                     {
                         if (pixelAlpha < 255)
                         {
-                            int alpha = pixel.Alpha + (pixel.Alpha % alphaFader);
+                            int alpha = pixel.A + (pixel.A % alphaFader);
                             pixelAlpha = (byte)(alpha > 255 ? 255 : alpha);
                         }
 
-                        byte pixelRed = pixel.Red;
-                        byte pixelGreen = pixel.Green;
-                        byte pixelBlue = pixel.Blue;
+                        byte pixelRed = pixel.R;
+                        byte pixelGreen = pixel.G;
+                        byte pixelBlue = pixel.B;
 
                         pixelAlpha = (byte)((pixelAlpha >> 3) + 1);
                         pixelRed = (byte)((pixelRed >> 3) + 1);
@@ -224,7 +237,7 @@
             }
 
             // Set a default pixel for images with less than 256 colors.
-            moments[0, 0, 0, 0].Add(new Pixel(0, 0, 0, 0));
+            moments[0, 0, 0, 0].Add(new Color32(0, 0, 0, 0));
         }
 
         /// <summary>
@@ -689,12 +702,12 @@
         /// The three dimensional array of <see cref="ColorMoment"/>.
         /// </param>
         /// <returns>
-        /// The array of <see cref="Pixel"/>.
+        /// The array of <see cref="Color32"/>.
         /// </returns>
         [SuppressMessage("StyleCop.CSharp.SpacingRules", "SA1001:CommasMustBeSpacedCorrectly", Justification = "Reviewed. Suppression is OK here.")]
-        private static Pixel[] BuildLookups(Box[] cubes, ColorMoment[, , ,] moments)
+        private static Color32[] BuildLookups(Box[] cubes, ColorMoment[, , ,] moments)
         {
-            Pixel[] lookups = new Pixel[cubes.Length];
+            Color32[] lookups = new Color32[cubes.Length];
 
             for (int cubeIndex = 0; cubeIndex < cubes.Length; cubeIndex++)
             {
@@ -705,12 +718,12 @@
                     continue;
                 }
 
-                Pixel lookup = new Pixel
+                Color32 lookup = new Color32
                 {
-                    Alpha = (byte)(volume.Alpha / volume.Weight),
-                    Red = (byte)(volume.Red / volume.Weight),
-                    Green = (byte)(volume.Green / volume.Weight),
-                    Blue = (byte)(volume.Blue / volume.Weight)
+                    A = (byte)(volume.Alpha / volume.Weight),
+                    R = (byte)(volume.Red / volume.Weight),
+                    G = (byte)(volume.Green / volume.Weight),
+                    B = (byte)(volume.Blue / volume.Weight)
                 };
 
                 lookups[cubeIndex] = lookup;