Merge pull request #316 from DarthAffe/RenderPerformance

Render performance

RGB.NET.Core/Rendering/Textures/PixelTexture.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Buffers;
 using System.Runtime.CompilerServices;
 
 namespace RGB.NET.Core;
@@ -12,12 +11,6 @@ namespace RGB.NET.Core;
 public abstract class PixelTexture<T> : ITexture
     where T : unmanaged
 {
-    #region Constants
-
-    private const int STACK_ALLOC_LIMIT = 1024;
-
-    #endregion
-
     #region Properties & Fields
 
     private readonly int _dataPerPixel;
@@ -85,31 +78,12 @@ public abstract class PixelTexture<T> : ITexture
             if ((width == 0) || (height == 0)) return Color.Transparent;
             if ((width == 1) && (height == 1)) return GetColor(GetPixelData(x, y));
 
-            int bufferSize = width * height * _dataPerPixel;
-            if (bufferSize <= STACK_ALLOC_LIMIT)
-            {
-                Span<T> buffer = stackalloc T[bufferSize];
-                GetRegionData(x, y, width, height, buffer);
+            SamplerInfo<T> samplerInfo = new(x, y, width, height, _stride, _dataPerPixel, Data);
 
-                Span<T> pixelData = stackalloc T[_dataPerPixel];
-                Sampler.Sample(new SamplerInfo<T>(width, height, buffer), pixelData);
+            Span<T> pixelData = stackalloc T[_dataPerPixel];
+            Sampler.Sample(samplerInfo, pixelData);
 
-                return GetColor(pixelData);
-            }
-            else
-            {
-                T[] rent = ArrayPool<T>.Shared.Rent(bufferSize);
-
-                Span<T> buffer = new Span<T>(rent)[..bufferSize];
-                GetRegionData(x, y, width, height, buffer);
-
-                Span<T> pixelData = stackalloc T[_dataPerPixel];
-                Sampler.Sample(new SamplerInfo<T>(width, height, buffer), pixelData);
-
-                ArrayPool<T>.Shared.Return(rent);
-
-                return GetColor(pixelData);
-            }
+            return GetColor(pixelData);
         }
     }
 
@@ -152,27 +126,7 @@ public abstract class PixelTexture<T> : ITexture
     /// <param name="y">The y-location.</param>
     /// <returns>The pixel-data on the specified location.</returns>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    protected virtual ReadOnlySpan<T> GetPixelData(int x, int y) => Data.Slice((y * _stride) + x, _dataPerPixel);
-
-    /// <summary>
-    /// Writes the pixel-data of the specified region to the passed buffer.
-    /// </summary>
-    /// <param name="x">The x-location of the region to get the data for.</param>
-    /// <param name="y">The y-location of the region to get the data for.</param>
-    /// <param name="width">The width of the region to get the data for.</param>
-    /// <param name="height">The height of the region to get the data for.</param>
-    /// <param name="buffer">The buffer to write the data to.</param>
-    protected virtual void GetRegionData(int x, int y, int width, int height, in Span<T> buffer)
-    {
-        int dataWidth = width * _dataPerPixel;
-        ReadOnlySpan<T> data = Data;
-        for (int i = 0; i < height; i++)
-        {
-            ReadOnlySpan<T> dataSlice = data.Slice((((y + i) * _stride) + x) * _dataPerPixel, dataWidth);
-            Span<T> destination = buffer.Slice(i * dataWidth, dataWidth);
-            dataSlice.CopyTo(destination);
-        }
-    }
+    private ReadOnlySpan<T> GetPixelData(int x, int y) => Data.Slice((y * _stride) + x, _dataPerPixel);
 
     #endregion
 }
@@ -225,6 +179,7 @@ public sealed class PixelTexture : PixelTexture<Color>
     #region Methods
 
     /// <inheritdoc />
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     protected override Color GetColor(in ReadOnlySpan<Color> pixel) => pixel[0];
 
     #endregion

RGB.NET.Core/Rendering/Textures/Sampler/AverageColorSampler.cs

@@ -30,20 +30,35 @@ public sealed class AverageColorSampler : ISampler<Color>
 
         float a = 0, r = 0, g = 0, b = 0;
 
-        if (Vector.IsHardwareAccelerated && (info.Data.Length >= Vector<float>.Count))
+        if (Vector.IsHardwareAccelerated && (info.Height > 1) && (info.Width >= ELEMENTS_PER_VECTOR))
         {
-            int chunks = info.Data.Length / ELEMENTS_PER_VECTOR;
-            int missingElements = info.Data.Length - (chunks * ELEMENTS_PER_VECTOR);
+            int chunks = info.Width / ELEMENTS_PER_VECTOR;
+            int missingElements = info.Width - (chunks * ELEMENTS_PER_VECTOR);
 
             Vector<float> sum = Vector<float>.Zero;
 
-            fixed (Color* colorPtr = &MemoryMarshal.GetReference(info.Data))
+            for (int y = 0; y < info.Height; y++)
             {
-                Color* current = colorPtr;
-                for (int i = 0; i < chunks; i++)
+                ReadOnlySpan<Color> data = info[y];
+
+                fixed (Color* colorPtr = &MemoryMarshal.GetReference(data))
                 {
-                    sum = Vector.Add(sum, *(Vector<float>*)current);
-                    current += ELEMENTS_PER_VECTOR;
+                    Color* current = colorPtr;
+                    for (int i = 0; i < chunks; i++)
+                    {
+                        sum = Vector.Add(sum, *(Vector<float>*)current);
+                        current += ELEMENTS_PER_VECTOR;
+                    }
+                }
+
+                for (int i = 0; i < missingElements; i++)
+                {
+                    Color color = data[^(i + 1)];
+
+                    a += color.A;
+                    r += color.R;
+                    g += color.G;
+                    b += color.B;
                 }
             }
 
@@ -54,26 +69,17 @@ public sealed class AverageColorSampler : ISampler<Color>
                 g += sum[i + 2];
                 b += sum[i + 3];
             }
-
-            for (int i = 0; i < missingElements; i++)
-            {
-                Color color = info.Data[^(i + 1)];
-
-                a += color.A;
-                r += color.R;
-                g += color.G;
-                b += color.B;
-            }
         }
         else
         {
-            foreach (Color color in info.Data)
-            {
-                a += color.A;
-                r += color.R;
-                g += color.G;
-                b += color.B;
-            }
+            for (int y = 0; y < info.Height; y++)
+                foreach (Color color in info[y])
+                {
+                    a += color.A;
+                    r += color.R;
+                    g += color.G;
+                    b += color.B;
+                }
         }
 
         pixelData[0] = new Color(a / count, r / count, g / count, b / count);

RGB.NET.Core/Rendering/Textures/Sampler/SamplerInfo.cs

@@ -10,20 +10,29 @@ public readonly ref struct SamplerInfo<T>
 {
     #region Properties & Fields
 
+    private readonly ReadOnlySpan<T> _data;
+    private readonly int _x;
+    private readonly int _y;
+    private readonly int _stride;
+    private readonly int _dataPerPixel;
+    private readonly int _dataWidth;
+
     /// <summary>
     /// Gets the width of the region the data comes from.
     /// </summary>
-    public int Width { get; }
+    public readonly int Width;
 
     /// <summary>
     /// Gets the height of region the data comes from.
     /// </summary>
-    public int Height { get; }
+    public readonly int Height;
 
     /// <summary>
-    /// Gets the data to sample.
+    /// Gets the data for the requested row.
     /// </summary>
-    public ReadOnlySpan<T> Data { get; }
+    /// <param name="row">The row to get the data for.</param>
+    /// <returns>A readonly span containing the data of the row.</returns>
+    public ReadOnlySpan<T> this[int row] => _data.Slice((((_y + row) * _stride) + _x) * _dataPerPixel, _dataWidth);
 
     #endregion
 
@@ -35,11 +44,17 @@ public readonly ref struct SamplerInfo<T>
     /// <param name="width">The width of the region the data comes from.</param>
     /// <param name="height">The height of region the data comes from.</param>
     /// <param name="data">The data to sample.</param>
-    public SamplerInfo(int width, int height, ReadOnlySpan<T> data)
+    public SamplerInfo(int x, int y, int width, int height, int stride, int dataPerPixel, in ReadOnlySpan<T> data)
     {
+        this._x = x;
+        this._y = y;
+        this._data = data;
+        this._stride = stride;
+        this._dataPerPixel = dataPerPixel;
         this.Width = width;
         this.Height = height;
-        this.Data = data;
+
+        _dataWidth = width * dataPerPixel;
     }
 
     #endregion

RGB.NET.Presets/Textures/BytePixelTexture.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Runtime.CompilerServices;
 using RGB.NET.Core;
 using RGB.NET.Presets.Textures.Sampler;
 
@@ -59,6 +60,7 @@ public sealed class BytePixelTexture : PixelTexture<byte>
     #region Methods
 
     /// <inheritdoc />
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     protected override Color GetColor(in ReadOnlySpan<byte> pixel)
     {
         return ColorFormat switch

RGB.NET.Presets/Textures/FloatPixelTexture.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Runtime.CompilerServices;
 using RGB.NET.Core;
 using RGB.NET.Presets.Textures.Sampler;
 
@@ -59,6 +60,7 @@ public sealed class FloatPixelTexture : PixelTexture<float>
     #region Methods
 
     /// <inheritdoc />
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     protected override Color GetColor(in ReadOnlySpan<float> pixel)
     {
         return ColorFormat switch

RGB.NET.Presets/Textures/Sampler/AverageByteSampler.cs

@@ -24,41 +24,48 @@ public sealed class AverageByteSampler : ISampler<byte>
         int count = info.Width * info.Height;
         if (count == 0) return;
 
-        ReadOnlySpan<byte> data = info.Data;
-
         int dataLength = pixelData.Length;
         Span<uint> sums = stackalloc uint[dataLength];
 
-        if (Vector.IsHardwareAccelerated && (data.Length >= Vector<byte>.Count) && (dataLength <= Vector<byte>.Count))
+        int elementsPerVector = Vector<byte>.Count / dataLength;
+        int valuesPerVector = elementsPerVector * dataLength;
+        if (Vector.IsHardwareAccelerated && (info.Height > 1) && (info.Width >= valuesPerVector) && (dataLength <= Vector<byte>.Count))
         {
-            int elementsPerVector = Vector<byte>.Count / dataLength;
-            int valuesPerVector = elementsPerVector * dataLength;
-
-            int chunks = data.Length / valuesPerVector;
-            int missingElements = data.Length - (chunks * valuesPerVector);
+            int chunks = info.Width / elementsPerVector;
 
             Vector<uint> sum1 = Vector<uint>.Zero;
             Vector<uint> sum2 = Vector<uint>.Zero;
             Vector<uint> sum3 = Vector<uint>.Zero;
             Vector<uint> sum4 = Vector<uint>.Zero;
 
-            fixed (byte* colorPtr = &MemoryMarshal.GetReference(data))
+            for (int y = 0; y < info.Height; y++)
             {
-                byte* current = colorPtr;
-                for (int i = 0; i < chunks; i++)
+                ReadOnlySpan<byte> data = info[y];
+
+                fixed (byte* colorPtr = &MemoryMarshal.GetReference(data))
                 {
-                    Vector<byte> bytes = *(Vector<byte>*)current;
-                    Vector.Widen(bytes, out Vector<ushort> short1, out Vector<ushort> short2);
-                    Vector.Widen(short1, out Vector<uint> int1, out Vector<uint> int2);
-                    Vector.Widen(short2, out Vector<uint> int3, out Vector<uint> int4);
+                    byte* current = colorPtr;
+                    for (int i = 0; i < chunks; i++)
+                    {
+                        Vector<byte> bytes = *(Vector<byte>*)current;
+                        Vector.Widen(bytes, out Vector<ushort> short1, out Vector<ushort> short2);
+                        Vector.Widen(short1, out Vector<uint> int1, out Vector<uint> int2);
+                        Vector.Widen(short2, out Vector<uint> int3, out Vector<uint> int4);
 
-                    sum1 = Vector.Add(sum1, int1);
-                    sum2 = Vector.Add(sum2, int2);
-                    sum3 = Vector.Add(sum3, int3);
-                    sum4 = Vector.Add(sum4, int4);
+                        sum1 = Vector.Add(sum1, int1);
+                        sum2 = Vector.Add(sum2, int2);
+                        sum3 = Vector.Add(sum3, int3);
+                        sum4 = Vector.Add(sum4, int4);
 
-                    current += valuesPerVector;
+                        current += valuesPerVector;
+                    }
                 }
+
+                int missingElements = data.Length - (chunks * valuesPerVector);
+                int offset = chunks * valuesPerVector;
+                for (int i = 0; i < missingElements; i += dataLength)
+                    for (int j = 0; j < sums.Length; j++)
+                        sums[j] += data[offset + i + j];
             }
 
             int value = 0;
@@ -102,17 +109,16 @@ public sealed class AverageByteSampler : ISampler<byte>
                 if (sumIndex >= dataLength)
                     sumIndex = 0;
             }
-
-            int offset = chunks * valuesPerVector;
-            for (int i = 0; i < missingElements; i += dataLength)
-                for (int j = 0; j < sums.Length; j++)
-                    sums[j] += data[offset + i + j];
         }
         else
         {
-            for (int i = 0; i < data.Length; i += dataLength)
-                for (int j = 0; j < sums.Length; j++)
-                    sums[j] += data[i + j];
+            for (int y = 0; y < info.Height; y++)
+            {
+                ReadOnlySpan<byte> data = info[y];
+                for (int i = 0; i < data.Length; i += dataLength)
+                    for (int j = 0; j < sums.Length; j++)
+                        sums[j] += data[i + j];
+            }
         }
 
         float divisor = count * byte.MaxValue;

RGB.NET.Presets/Textures/Sampler/AverageFloatSampler.cs

@@ -18,45 +18,51 @@ public sealed class AverageFloatSampler : ISampler<float>
         int count = info.Width * info.Height;
         if (count == 0) return;
 
-        ReadOnlySpan<float> data = info.Data;
-
         int dataLength = pixelData.Length;
         Span<float> sums = stackalloc float[dataLength];
-        
-        if (Vector.IsHardwareAccelerated && (data.Length >= Vector<float>.Count) && (dataLength <= Vector<float>.Count))
-        {
-            int elementsPerVector = Vector<float>.Count / dataLength;
-            int valuesPerVector = elementsPerVector * dataLength;
 
-            int chunks = data.Length / valuesPerVector;
-            int missingElements = data.Length - (chunks * valuesPerVector);
+        int elementsPerVector = Vector<float>.Count / dataLength;
+        int valuesPerVector = elementsPerVector * dataLength;
+        if (Vector.IsHardwareAccelerated && (info.Height > 1) && (info.Width >= valuesPerVector) && (dataLength <= Vector<float>.Count))
+        {
+            int chunks = info.Width / elementsPerVector;
 
             Vector<float> sum = Vector<float>.Zero;
 
-            fixed (float* colorPtr = &MemoryMarshal.GetReference(data))
+            for (int y = 0; y < info.Height; y++)
             {
-                float* current = colorPtr;
-                for (int i = 0; i < chunks; i++)
+                ReadOnlySpan<float> data = info[y];
+
+                fixed (float* colorPtr = &MemoryMarshal.GetReference(data))
                 {
-                    sum = Vector.Add(sum, *(Vector<float>*)current);
-                    current += valuesPerVector;
+                    float* current = colorPtr;
+                    for (int i = 0; i < chunks; i++)
+                    {
+                        sum = Vector.Add(sum, *(Vector<float>*)current);
+                        current += valuesPerVector;
+                    }
                 }
+
+                int missingElements = data.Length - (chunks * valuesPerVector);
+                int offset = chunks * valuesPerVector;
+                for (int i = 0; i < missingElements; i += dataLength)
+                    for (int j = 0; j < sums.Length; j++)
+                        sums[j] += data[offset + i + j];
             }
 
             for (int i = 0; i < valuesPerVector; i += dataLength)
                 for (int j = 0; j < sums.Length; j++)
                     sums[j] += sum[i + j];
-
-            int offset = chunks * valuesPerVector;
-            for (int i = 0; i < missingElements; i += dataLength)
-                for (int j = 0; j < sums.Length; j++)
-                    sums[j] += data[offset + i + j];
         }
         else
         {
-            for (int i = 0; i < data.Length; i += dataLength)
-                for (int j = 0; j < sums.Length; j++)
-                    sums[j] += data[i + j];
+            for (int y = 0; y < info.Height; y++)
+            {
+                ReadOnlySpan<float> data = info[y];
+                for (int i = 0; i < data.Length; i += dataLength)
+                    for (int j = 0; j < sums.Length; j++)
+                        sums[j] += data[i + j];
+            }
         }
 
         for (int i = 0; i < pixelData.Length; i++)

Tests/RGB.NET.Core.Tests/Helper/SimplexNoise.cs

@@ -0,0 +1,347 @@
+// ReSharper disable InconsistentNaming
+
+using System;
+
+namespace RGB.NET.Core.Tests.Helper;
+
+// Simplex Noise for C#
+// Copyright © Benjamin Ward 2019
+// See LICENSE (https://github.com/WardBenjamin/SimplexNoise/blob/2afa9a63483562cc4c0a95bbfa6b183fc256a790/LICENSE.txt)
+// Simplex Noise implementation offering 1D, 2D, and 3D forms w/ values in the range of 0 to 255.
+// Based on work by Heikki Törmälä (2012) and Stefan Gustavson (2006).
+
+/// <summary>
+/// Implementation of the Perlin simplex noise, an improved Perlin noise algorithm.
+/// Based loosely on SimplexNoise1234 by Stefan Gustavson: http://staffwww.itn.liu.se/~stegu/aqsis/aqsis-newnoise/
+/// </summary>
+public static class SimplexNoise
+{
+    public static float[] Calc1D(int width, float scale)
+    {
+        float[] values = new float[width];
+        for (int i = 0; i < width; i++)
+            values[i] = Generate(i * scale);
+        return values;
+    }
+
+    public static float[,] Calc2D(int width, int height, float scale)
+    {
+        float[,] values = new float[width, height];
+        for (int i = 0; i < width; i++)
+            for (int j = 0; j < height; j++)
+                values[i, j] = Generate(i * scale, j * scale);
+        return values;
+    }
+
+    public static float[,,] Calc3D(int width, int height, int length, float scale)
+    {
+        float[,,] values = new float[width, height, length];
+        for (int i = 0; i < width; i++)
+            for (int j = 0; j < height; j++)
+                for (int k = 0; k < length; k++)
+                    values[i, j, k] = Generate(i * scale, j * scale, k * scale);
+        return values;
+    }
+
+    public static float CalcPixel1D(int x, float scale) => Generate(x * scale);
+    public static float CalcPixel2D(int x, int y, float scale) => Generate(x * scale, y * scale);
+    public static float CalcPixel3D(int x, int y, int z, float scale) => Generate(x * scale, y * scale, z * scale);
+
+    static SimplexNoise()
+    {
+        _perm = new byte[PermOriginal.Length];
+        PermOriginal.CopyTo(_perm, 0);
+    }
+
+    public static int Seed
+    {
+        get => _seed;
+        set
+        {
+            if (value == 0)
+            {
+                _perm = new byte[PermOriginal.Length];
+                PermOriginal.CopyTo(_perm, 0);
+            }
+            else
+            {
+                _perm = new byte[512];
+                Random random = new Random(value);
+                random.NextBytes(_perm);
+            }
+
+            _seed = value;
+        }
+    }
+
+    private static int _seed;
+
+    /// <summary>
+    /// 1D simplex noise
+    /// </summary>
+    /// <param name="x"></param>
+    /// <returns></returns>
+    private static float Generate(float x)
+    {
+        int i0 = FastFloor(x);
+        int i1 = i0 + 1;
+        float x0 = x - i0;
+        float x1 = x0 - 1.0f;
+
+        float t0 = 1.0f - (x0 * x0);
+        t0 *= t0;
+        float n0 = t0 * t0 * Grad(_perm[i0 & 0xff], x0);
+
+        float t1 = 1.0f - (x1 * x1);
+        t1 *= t1;
+        float n1 = t1 * t1 * Grad(_perm[i1 & 0xff], x1);
+        // The maximum value of this noise is 8*(3/4)^4 = 2.53125
+        // A factor of 0.395 scales to fit exactly within [-1,1]
+        return 0.395f * (n0 + n1);
+    }
+
+    /// <summary>
+    /// 2D simplex noise
+    /// </summary>
+    /// <param name="x"></param>
+    /// <param name="y"></param>
+    /// <returns></returns>
+    private static float Generate(float x, float y)
+    {
+        const float F2 = 0.366025403f; // F2 = 0.5*(sqrt(3.0)-1.0)
+        const float G2 = 0.211324865f; // G2 = (3.0-Math.sqrt(3.0))/6.0
+
+        float n0, n1, n2; // Noise contributions from the three corners
+
+        // Skew the input space to determine which simplex cell we're in
+        float s = (x + y) * F2; // Hairy factor for 2D
+        float xs = x + s;
+        float ys = y + s;
+        int i = FastFloor(xs);
+        int j = FastFloor(ys);
+
+        float t = (i + j) * G2;
+        float X0 = i - t; // Unskew the cell origin back to (x,y) space
+        float Y0 = j - t;
+        float x0 = x - X0; // The x,y distances from the cell origin
+        float y0 = y - Y0;
+
+        // For the 2D case, the simplex shape is an equilateral triangle.
+        // Determine which simplex we are in.
+        int i1, j1; // Offsets for second (middle) corner of simplex in (i,j) coords
+        if (x0 > y0) { i1 = 1; j1 = 0; } // lower triangle, XY order: (0,0)->(1,0)->(1,1)
+        else { i1 = 0; j1 = 1; }      // upper triangle, YX order: (0,0)->(0,1)->(1,1)
+
+        // A step of (1,0) in (i,j) means a step of (1-c,-c) in (x,y), and
+        // a step of (0,1) in (i,j) means a step of (-c,1-c) in (x,y), where
+        // c = (3-sqrt(3))/6
+
+        float x1 = (x0 - i1) + G2; // Offsets for middle corner in (x,y) unskewed coords
+        float y1 = (y0 - j1) + G2;
+        float x2 = (x0 - 1.0f) + (2.0f * G2); // Offsets for last corner in (x,y) unskewed coords
+        float y2 = (y0 - 1.0f) + (2.0f * G2);
+
+        // Wrap the integer indices at 256, to avoid indexing perm[] out of bounds
+        int ii = Mod(i, 256);
+        int jj = Mod(j, 256);
+
+        // Calculate the contribution from the three corners
+        float t0 = 0.5f - (x0 * x0) - (y0 * y0);
+        if (t0 < 0.0f) n0 = 0.0f;
+        else
+        {
+            t0 *= t0;
+            n0 = t0 * t0 * Grad(_perm[ii + _perm[jj]], x0, y0);
+        }
+
+        float t1 = 0.5f - (x1 * x1) - (y1 * y1);
+        if (t1 < 0.0f) n1 = 0.0f;
+        else
+        {
+            t1 *= t1;
+            n1 = t1 * t1 * Grad(_perm[ii + i1 + _perm[jj + j1]], x1, y1);
+        }
+
+        float t2 = 0.5f - (x2 * x2) - (y2 * y2);
+        if (t2 < 0.0f) n2 = 0.0f;
+        else
+        {
+            t2 *= t2;
+            n2 = t2 * t2 * Grad(_perm[ii + 1 + _perm[jj + 1]], x2, y2);
+        }
+
+        // Add contributions from each corner to get the final noise value.
+        // The result is scaled to return values in the interval [-1,1].
+        return 40.0f * (n0 + n1 + n2); // TODO: The scale factor is preliminary!
+    }
+
+
+    private static float Generate(float x, float y, float z)
+    {
+        // Simple skewing factors for the 3D case
+        const float F3 = 0.333333333f;
+        const float G3 = 0.166666667f;
+
+        float n0, n1, n2, n3; // Noise contributions from the four corners
+
+        // Skew the input space to determine which simplex cell we're in
+        float s = (x + y + z) * F3; // Very nice and simple skew factor for 3D
+        float xs = x + s;
+        float ys = y + s;
+        float zs = z + s;
+        int i = FastFloor(xs);
+        int j = FastFloor(ys);
+        int k = FastFloor(zs);
+
+        float t = (i + j + k) * G3;
+        float X0 = i - t; // Unskew the cell origin back to (x,y,z) space
+        float Y0 = j - t;
+        float Z0 = k - t;
+        float x0 = x - X0; // The x,y,z distances from the cell origin
+        float y0 = y - Y0;
+        float z0 = z - Z0;
+
+        // For the 3D case, the simplex shape is a slightly irregular tetrahedron.
+        // Determine which simplex we are in.
+        int i1, j1, k1; // Offsets for second corner of simplex in (i,j,k) coords
+        int i2, j2, k2; // Offsets for third corner of simplex in (i,j,k) coords
+
+        /* This code would benefit from a backport from the GLSL version! */
+        if (x0 >= y0)
+        {
+            if (y0 >= z0)
+            { i1 = 1; j1 = 0; k1 = 0; i2 = 1; j2 = 1; k2 = 0; } // X Y Z order
+            else if (x0 >= z0) { i1 = 1; j1 = 0; k1 = 0; i2 = 1; j2 = 0; k2 = 1; } // X Z Y order
+            else { i1 = 0; j1 = 0; k1 = 1; i2 = 1; j2 = 0; k2 = 1; } // Z X Y order
+        }
+        else
+        { // x0<y0
+            if (y0 < z0) { i1 = 0; j1 = 0; k1 = 1; i2 = 0; j2 = 1; k2 = 1; } // Z Y X order
+            else if (x0 < z0) { i1 = 0; j1 = 1; k1 = 0; i2 = 0; j2 = 1; k2 = 1; } // Y Z X order
+            else { i1 = 0; j1 = 1; k1 = 0; i2 = 1; j2 = 1; k2 = 0; } // Y X Z order
+        }
+
+        // A step of (1,0,0) in (i,j,k) means a step of (1-c,-c,-c) in (x,y,z),
+        // a step of (0,1,0) in (i,j,k) means a step of (-c,1-c,-c) in (x,y,z), and
+        // a step of (0,0,1) in (i,j,k) means a step of (-c,-c,1-c) in (x,y,z), where
+        // c = 1/6.
+
+        float x1 = (x0 - i1) + G3; // Offsets for second corner in (x,y,z) coords
+        float y1 = (y0 - j1) + G3;
+        float z1 = (z0 - k1) + G3;
+        float x2 = (x0 - i2) + (2.0f * G3); // Offsets for third corner in (x,y,z) coords
+        float y2 = (y0 - j2) + (2.0f * G3);
+        float z2 = (z0 - k2) + (2.0f * G3);
+        float x3 = (x0 - 1.0f) + (3.0f * G3); // Offsets for last corner in (x,y,z) coords
+        float y3 = (y0 - 1.0f) + (3.0f * G3);
+        float z3 = (z0 - 1.0f) + (3.0f * G3);
+
+        // Wrap the integer indices at 256, to avoid indexing perm[] out of bounds
+        int ii = Mod(i, 256);
+        int jj = Mod(j, 256);
+        int kk = Mod(k, 256);
+
+        // Calculate the contribution from the four corners
+        float t0 = 0.6f - (x0 * x0) - (y0 * y0) - (z0 * z0);
+        if (t0 < 0.0f) n0 = 0.0f;
+        else
+        {
+            t0 *= t0;
+            n0 = t0 * t0 * Grad(_perm[ii + _perm[jj + _perm[kk]]], x0, y0, z0);
+        }
+
+        float t1 = 0.6f - (x1 * x1) - (y1 * y1) - (z1 * z1);
+        if (t1 < 0.0f) n1 = 0.0f;
+        else
+        {
+            t1 *= t1;
+            n1 = t1 * t1 * Grad(_perm[ii + i1 + _perm[jj + j1 + _perm[kk + k1]]], x1, y1, z1);
+        }
+
+        float t2 = 0.6f - (x2 * x2) - (y2 * y2) - (z2 * z2);
+        if (t2 < 0.0f) n2 = 0.0f;
+        else
+        {
+            t2 *= t2;
+            n2 = t2 * t2 * Grad(_perm[ii + i2 + _perm[jj + j2 + _perm[kk + k2]]], x2, y2, z2);
+        }
+
+        float t3 = 0.6f - (x3 * x3) - (y3 * y3) - (z3 * z3);
+        if (t3 < 0.0f) n3 = 0.0f;
+        else
+        {
+            t3 *= t3;
+            n3 = t3 * t3 * Grad(_perm[ii + 1 + _perm[jj + 1 + _perm[kk + 1]]], x3, y3, z3);
+        }
+
+        // Add contributions from each corner to get the final noise value.
+        // The result is scaled to stay just inside [-1,1]
+        return 32.0f * (n0 + n1 + n2 + n3); // TODO: The scale factor is preliminary!
+    }
+
+    private static byte[] _perm;
+
+    private static readonly byte[] PermOriginal = {
+            151,160,137,91,90,15,
+            131,13,201,95,96,53,194,233,7,225,140,36,103,30,69,142,8,99,37,240,21,10,23,
+            190, 6,148,247,120,234,75,0,26,197,62,94,252,219,203,117,35,11,32,57,177,33,
+            88,237,149,56,87,174,20,125,136,171,168, 68,175,74,165,71,134,139,48,27,166,
+            77,146,158,231,83,111,229,122,60,211,133,230,220,105,92,41,55,46,245,40,244,
+            102,143,54, 65,25,63,161, 1,216,80,73,209,76,132,187,208, 89,18,169,200,196,
+            135,130,116,188,159,86,164,100,109,198,173,186, 3,64,52,217,226,250,124,123,
+            5,202,38,147,118,126,255,82,85,212,207,206,59,227,47,16,58,17,182,189,28,42,
+            223,183,170,213,119,248,152, 2,44,154,163, 70,221,153,101,155,167, 43,172,9,
+            129,22,39,253, 19,98,108,110,79,113,224,232,178,185, 112,104,218,246,97,228,
+            251,34,242,193,238,210,144,12,191,179,162,241, 81,51,145,235,249,14,239,107,
+            49,192,214, 31,181,199,106,157,184, 84,204,176,115,121,50,45,127, 4,150,254,
+            138,236,205,93,222,114,67,29,24,72,243,141,128,195,78,66,215,61,156,180,
+            151,160,137,91,90,15,
+            131,13,201,95,96,53,194,233,7,225,140,36,103,30,69,142,8,99,37,240,21,10,23,
+            190, 6,148,247,120,234,75,0,26,197,62,94,252,219,203,117,35,11,32,57,177,33,
+            88,237,149,56,87,174,20,125,136,171,168, 68,175,74,165,71,134,139,48,27,166,
+            77,146,158,231,83,111,229,122,60,211,133,230,220,105,92,41,55,46,245,40,244,
+            102,143,54, 65,25,63,161, 1,216,80,73,209,76,132,187,208, 89,18,169,200,196,
+            135,130,116,188,159,86,164,100,109,198,173,186, 3,64,52,217,226,250,124,123,
+            5,202,38,147,118,126,255,82,85,212,207,206,59,227,47,16,58,17,182,189,28,42,
+            223,183,170,213,119,248,152, 2,44,154,163, 70,221,153,101,155,167, 43,172,9,
+            129,22,39,253, 19,98,108,110,79,113,224,232,178,185, 112,104,218,246,97,228,
+            251,34,242,193,238,210,144,12,191,179,162,241, 81,51,145,235,249,14,239,107,
+            49,192,214, 31,181,199,106,157,184, 84,204,176,115,121,50,45,127, 4,150,254,
+            138,236,205,93,222,114,67,29,24,72,243,141,128,195,78,66,215,61,156,180
+        };
+
+    private static int FastFloor(float x)
+    {
+        return (x > 0) ? ((int)x) : (((int)x) - 1);
+    }
+
+    private static int Mod(int x, int m)
+    {
+        int a = x % m;
+        return a < 0 ? a + m : a;
+    }
+
+    private static float Grad(int hash, float x)
+    {
+        int h = hash & 15;
+        float grad = 1.0f + (h & 7);   // Gradient value 1.0, 2.0, ..., 8.0
+        if ((h & 8) != 0) grad = -grad;         // Set a random sign for the gradient
+        return (grad * x);           // Multiply the gradient with the distance
+    }
+
+    private static float Grad(int hash, float x, float y)
+    {
+        int h = hash & 7;      // Convert low 3 bits of hash code
+        float u = h < 4 ? x : y;  // into 8 simple gradient directions,
+        float v = h < 4 ? y : x;  // and compute the dot product with (x,y).
+        return ((h & 1) != 0 ? -u : u) + ((h & 2) != 0 ? -2.0f * v : 2.0f * v);
+    }
+
+    private static float Grad(int hash, float x, float y, float z)
+    {
+        int h = hash & 15;     // Convert low 4 bits of hash code into 12 simple
+        float u = h < 8 ? x : y; // gradient directions, and compute dot product.
+        float v = h < 4 ? y : (h == 12) || (h == 14) ? x : z; // Fix repeats at h = 12 to 15
+        return ((h & 1) != 0 ? -u : u) + ((h & 2) != 0 ? -v : v);
+    }
+}

Tests/RGB.NET.Core.Tests/Sampler/AverageColorSamplerTest.cs

@@ -15,11 +15,11 @@ public class AverageColorSamplerTest
         data.Fill(new Core.Color(1f, 1f, 1f, 1f));
         Core.Color[] result = new Core.Color[1];
 
-        SamplerInfo<Core.Color> info = new(2, 3, data[..6]);
+        SamplerInfo<Core.Color> info = new(0, 0, 2, 3, 16, 1, data);
         new AverageColorSampler().Sample(info, result);
         Assert.AreEqual(new Core.Color(1f, 1f, 1f, 1f), result[0]);
 
-        info = new SamplerInfo<Core.Color>(16, 16, data);
+        info = new SamplerInfo<Core.Color>(0, 0, 16, 16, 16, 1, data);
         new AverageColorSampler().Sample(info, result);
         Assert.AreEqual(new Core.Color(1f, 1f, 1f, 1f), result[0]);
     }
@@ -31,11 +31,11 @@ public class AverageColorSamplerTest
         data.Fill(new Core.Color(1f, 0f, 0f, 0f));
         Core.Color[] result = new Core.Color[1];
 
-        SamplerInfo<Core.Color> info = new(2, 3, data[..6]);
+        SamplerInfo<Core.Color> info = new(0, 0, 2, 3, 16, 1, data);
         new AverageColorSampler().Sample(info, result);
         Assert.AreEqual(new Core.Color(1f, 0f, 0f, 0f), result[0]);
 
-        info = new SamplerInfo<Core.Color>(16, 16, data);
+        info = new SamplerInfo<Core.Color>(0, 0, 16, 16, 16, 1, data);
         new AverageColorSampler().Sample(info, result);
         Assert.AreEqual(new Core.Color(1f, 0f, 0f, 0f), result[0]);
     }
@@ -48,11 +48,11 @@ public class AverageColorSamplerTest
             data[i] = (i % 2) == 0 ? new Core.Color(1f, 0f, 0f, 0f) : new Core.Color(1f, 1f, 1f, 1f);
         Core.Color[] result = new Core.Color[1];
 
-        SamplerInfo<Core.Color> info = new(2, 3, data[..6]);
+        SamplerInfo<Core.Color> info = new(0, 0, 2, 3, 16, 1, data);
         new AverageColorSampler().Sample(info, result);
         Assert.AreEqual(new Core.Color(1f, 0.5f, 0.5f, 0.5f), result[0]);
 
-        info = new SamplerInfo<Core.Color>(16, 16, data);
+        info = new SamplerInfo<Core.Color>(0, 0, 16, 16, 16, 1, data);
         new AverageColorSampler().Sample(info, result);
         Assert.AreEqual(new Core.Color(1f, 0.5f, 0.5f, 0.5f), result[0]);
     }
@@ -72,11 +72,11 @@ public class AverageColorSamplerTest
             };
         Core.Color[] result = new Core.Color[1];
 
-        SamplerInfo<Core.Color> info = new(2, 3, data[..6]);
+        SamplerInfo<Core.Color> info = new(0, 0, 2, 3, 2, 1, data[..6]);
         new AverageColorSampler().Sample(info, result);
         Assert.AreEqual(new Core.Color(0.5833333f, 0.5f, 0.291666657f, 0.25f), result[0]);
 
-        info = new SamplerInfo<Core.Color>(16, 16, data);
+        info = new SamplerInfo<Core.Color>(0, 0, 16, 16, 16, 1, data);
         new AverageColorSampler().Sample(info, result);
         Assert.AreEqual(new Core.Color(0.5019531f, 0.40234375f, 0.3486328f, 0.298828125f), result[0]);
     }

Tests/RGB.NET.Core.Tests/Texture/PixelTextureTest.cs

@@ -0,0 +1,59 @@
+using System.Collections.Generic;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using RGB.NET.Core.Tests.Helper;
+
+namespace RGB.NET.Core.Tests.Texture;
+
+[TestClass]
+public class PixelTextureTest
+{
+    #region Methods
+
+    [TestMethod]
+    public void SampleRegionsTest()
+    {
+        const int SIZE = 1024;
+
+        Dictionary<Rectangle, Core.Color> testData = new()
+        {
+            [new Rectangle(0, 0, 1, 1)] = new Core.Color(255, 106, 159, 118),
+            [new Rectangle(0.09765625f, 0.486328125f, 0.427734375f, 0.2890625f)] = new Core.Color(255, 86, 115, 175),
+            [new Rectangle(0.5859375f, 0.111328125f, 0.271484375f, 0.826171875f)] = new Core.Color(255, 85, 183, 123),
+            [new Rectangle(0.279296875f, 0.439453125f, 0.583984375f, 0.499609375f)] = new Core.Color(255, 96, 144, 145),
+            [new Rectangle(0.603515625f, 0.646484375f, 0.365234375f, 0.306640625f)] = new Core.Color(255, 92, 151, 141),
+            [new Rectangle(0.583984375f, 0.11328125f, 0.314453125f, 0.662109375f)] = new Core.Color(255, 75, 201, 115),
+            [new Rectangle(0.166015625f, 0.740234375f, 0.76171875f, 0.166015625f)] = new Core.Color(255, 90, 150, 142),
+            [new Rectangle(0.384765625f, 0.017578125f, 0.576171875f, 0.82421875f)] = new Core.Color(255, 94, 164, 128),
+            [new Rectangle(0.216796875f, 0.5390625f, 0.669921875f, 0.2890625f)] = new Core.Color(255, 76, 135, 169),
+            [new Rectangle(0.08203125f, 0.060546875f, 0.857421875f, 0.8671875f)] = new Core.Color(255, 98, 167, 117),
+            [new Rectangle(0.345703125f, 0.431640625f, 0.560546875f, 0.25421875f)] = new Core.Color(255, 106, 167, 116),
+            [new Rectangle(0.54296875f, 0.12890625f, 0.40234375f, 0.8515625f)] = new Core.Color(255, 89, 183, 115),
+            [new Rectangle(0.00390625f, 0.462890625f, 0.953125f, 0.052734375f)] = new Core.Color(255, 138, 173, 96),
+            [new Rectangle(0.322265625f, 0.572265625f, 0.361328125f, 0.40234375f)] = new Core.Color(255, 123, 127, 128),
+            [new Rectangle(0.56640625f, 0.388671875f, 0.28125f, 0.423828125f)] = new Core.Color(255, 112, 161, 118),
+            [new Rectangle(0.119140625f, 0.28125f, 0.828125f, 0.501953125f)] = new Core.Color(255, 105, 170, 108),
+            [new Rectangle(0.173828125f, 0.8359375f, 0.7421875f, 0.119140625f)] = new Core.Color(255, 126, 151, 106),
+            [new Rectangle(0.109375f, 0.283203125f, 0.748046875f, 0.583984375f)] = new Core.Color(255, 102, 158, 122),
+            [new Rectangle(0.0546875f, 0.474609375f, 0.87109375f, 0.2734375f)] = new Core.Color(255, 101, 143, 140),
+            [new Rectangle(0.34765625f, 0.30859375f, 0.39453125f, 0.39453125f)] = new Core.Color(255, 99, 143, 136),
+            [new Rectangle(0.240234375f, 0.6796875f, 0.515625f, 0.248046875f)] = new Core.Color(255, 114, 135, 132),
+        };
+
+        Core.Color[] data = new Core.Color[SIZE * SIZE];
+        SimplexNoise.Seed = 1872;
+        for (int y = 0; y < SIZE; y++)
+            for (int x = 0; x < SIZE; x++)
+                data[(y * SIZE) + x] = HSVColor.Create(SimplexNoise.CalcPixel2D(x, y, 1f / SIZE) * 360, 1, 1);
+
+        PixelTexture texture = new(SIZE, SIZE, data);
+        foreach ((Rectangle rect, Core.Color color) in testData)
+        {
+            // DarthAffe 23.04.2023: To check it "correctly" the test-data would need to be setup with floating point colors, but i don't really bother for now - that should be good enough to detect breaking changes
+            (byte, byte, byte, byte) sampled = texture[rect].GetRGBBytes();
+            (byte, byte, byte, byte) refColor = color.GetRGBBytes();
+            Assert.AreEqual(refColor, sampled);
+        }
+    }
+
+    #endregion
+}

Tests/RGB.NET.Presets.Tests/Sampler/AverageByteSamplerTest.cs

@@ -27,11 +27,15 @@ public class AverageByteSamplerTest
             data[index++] = colorData[i].GetB();
         }
 
-        SamplerInfo<byte> info = new(2, 3, data[..(6 * 4)]);
+        SamplerInfo<byte> info = new(0, 0, 2, 3, 16, 4, data);
         new AverageByteSampler().Sample(info, result);
         Assert.AreEqual(new Color(1f, 1f, 1f, 1f), new Color(result[0], result[1], result[2], result[3]));
 
-        info = new SamplerInfo<byte>(16, 16, data);
+        info = new SamplerInfo<byte>(0, 0, 13, 13, 16, 4, data);
+        new AverageByteSampler().Sample(info, result);
+        Assert.AreEqual(new Color(1f, 1f, 1f, 1f), new Color(result[0], result[1], result[2], result[3]));
+
+        info = new SamplerInfo<byte>(0, 0, 16, 16, 16, 4, data);
         new AverageByteSampler().Sample(info, result);
         Assert.AreEqual(new Color(1f, 1f, 1f, 1f), new Color(result[0], result[1], result[2], result[3]));
     }
@@ -53,11 +57,15 @@ public class AverageByteSamplerTest
             data[index++] = colorData[i].GetB();
         }
 
-        SamplerInfo<byte> info = new(2, 3, data[..(6 * 4)]);
+        SamplerInfo<byte> info = new(0, 0, 2, 3, 16, 4, data);
         new AverageByteSampler().Sample(info, result);
         Assert.AreEqual(new Color(1f, 0f, 0f, 0f), new Color(result[0], result[1], result[2], result[3]));
 
-        info = new SamplerInfo<byte>(16, 16, data);
+        info = new SamplerInfo<byte>(0, 0, 13, 13, 16, 4, data);
+        new AverageByteSampler().Sample(info, result);
+        Assert.AreEqual(new Color(1f, 0f, 0f, 0f), new Color(result[0], result[1], result[2], result[3]));
+
+        info = new SamplerInfo<byte>(0, 0, 16, 16, 16, 4, data);
         new AverageByteSampler().Sample(info, result);
         Assert.AreEqual(new Color(1f, 0f, 0f, 0f), new Color(result[0], result[1], result[2], result[3]));
     }
@@ -80,11 +88,15 @@ public class AverageByteSamplerTest
             data[index++] = colorData[i].GetB();
         }
 
-        SamplerInfo<byte> info = new(2, 3, data[..(6 * 4)]);
+        SamplerInfo<byte> info = new(0, 0, 2, 3, 16, 4, data);
         new AverageByteSampler().Sample(info, result);
         Assert.AreEqual(new Color(1f, 0.5f, 0.5f, 0.5f), new Color(result[0], result[1], result[2], result[3]));
 
-        info = new SamplerInfo<byte>(16, 16, data);
+        info = new SamplerInfo<byte>(0, 0, 13, 13, 16, 4, data);
+        new AverageByteSampler().Sample(info, result);
+        Assert.AreEqual(new Color(1f, (6f / 13f).GetByteValueFromPercentage(), (6f / 13f).GetByteValueFromPercentage(), (6f / 13f).GetByteValueFromPercentage()), new Color(result[0], result[1], result[2], result[3]));
+
+        info = new SamplerInfo<byte>(0, 0, 16, 16, 16, 4, data);
         new AverageByteSampler().Sample(info, result);
         Assert.AreEqual(new Color(1f, 0.5f, 0.5f, 0.5f), new Color(result[0], result[1], result[2], result[3]));
     }
@@ -114,11 +126,11 @@ public class AverageByteSamplerTest
             data[index++] = colorData[i].GetB();
         }
 
-        SamplerInfo<byte> info = new(2, 3, data[..(6 * 4)]);
+        SamplerInfo<byte> info = new(0, 0, 2, 3, 2, 4, data[..(6 * 4)]);
         new AverageByteSampler().Sample(info, result);
         Assert.AreEqual(new Color(149, 128, 74, 64), new Color(result[0], result[1], result[2], result[3]));
 
-        info = new SamplerInfo<byte>(16, 16, data);
+        info = new SamplerInfo<byte>(0, 0, 16, 16, 16, 4, data);
         new AverageByteSampler().Sample(info, result);
         Assert.AreEqual(new Color(128, 103, 89, 76), new Color(result[0], result[1], result[2], result[3]));
     }

Tests/RGB.NET.Presets.Tests/Sampler/AverageFloatSamplerTest.cs

@@ -27,11 +27,15 @@ public class AverageFloatSamplerTest
             data[index++] = colorData[i].B;
         }
 
-        SamplerInfo<float> info = new(2, 3, data[..(6 * 4)]);
+        SamplerInfo<float> info = new(0, 0, 2, 3, 16, 4, data);
         new AverageFloatSampler().Sample(info, result);
         Assert.AreEqual(new Color(1f, 1f, 1f, 1f), new Color(result[0], result[1], result[2], result[3]));
 
-        info = new SamplerInfo<float>(16, 16, data);
+        info = new SamplerInfo<float>(0, 0, 13, 13, 16, 4, data);
+        new AverageFloatSampler().Sample(info, result);
+        Assert.AreEqual(new Color(1f, 1f, 1f, 1f), new Color(result[0], result[1], result[2], result[3]));
+
+        info = new SamplerInfo<float>(0, 0, 16, 16, 16, 4, data);
         new AverageFloatSampler().Sample(info, result);
         Assert.AreEqual(new Color(1f, 1f, 1f, 1f), new Color(result[0], result[1], result[2], result[3]));
     }
@@ -53,11 +57,15 @@ public class AverageFloatSamplerTest
             data[index++] = colorData[i].B;
         }
 
-        SamplerInfo<float> info = new(2, 3, data[..(6 * 4)]);
+        SamplerInfo<float> info = new(0, 0, 2, 3, 16, 4, data);
         new AverageFloatSampler().Sample(info, result);
         Assert.AreEqual(new Color(1f, 0f, 0f, 0f), new Color(result[0], result[1], result[2], result[3]));
 
-        info = new SamplerInfo<float>(16, 16, data);
+        info = new SamplerInfo<float>(0, 0, 13, 13, 16, 4, data);
+        new AverageFloatSampler().Sample(info, result);
+        Assert.AreEqual(new Color(1f, 0f, 0f, 0f), new Color(result[0], result[1], result[2], result[3]));
+
+        info = new SamplerInfo<float>(0, 0, 16, 16, 16, 4, data);
         new AverageFloatSampler().Sample(info, result);
         Assert.AreEqual(new Color(1f, 0f, 0f, 0f), new Color(result[0], result[1], result[2], result[3]));
     }
@@ -80,11 +88,15 @@ public class AverageFloatSamplerTest
             data[index++] = colorData[i].B;
         }
 
-        SamplerInfo<float> info = new(2, 3, data[..(6 * 4)]);
+        SamplerInfo<float> info = new(0, 0, 2, 3, 16, 4, data);
         new AverageFloatSampler().Sample(info, result);
         Assert.AreEqual(new Color(1f, 0.5f, 0.5f, 0.5f), new Color(result[0], result[1], result[2], result[3]));
 
-        info = new SamplerInfo<float>(16, 16, data);
+        info = new SamplerInfo<float>(0, 0, 13, 13, 16, 4, data);
+        new AverageFloatSampler().Sample(info, result);
+        Assert.AreEqual(new Color(1f, 6f / 13f, 6f / 13f, 6f / 13f), new Color(result[0], result[1], result[2], result[3]));
+
+        info = new SamplerInfo<float>(0, 0, 16, 16, 16, 4, data);
         new AverageFloatSampler().Sample(info, result);
         Assert.AreEqual(new Color(1f, 0.5f, 0.5f, 0.5f), new Color(result[0], result[1], result[2], result[3]));
     }
@@ -114,11 +126,11 @@ public class AverageFloatSamplerTest
             data[index++] = colorData[i].B;
         }
 
-        SamplerInfo<float> info = new(2, 3, data[..(6 * 4)]);
+        SamplerInfo<float> info = new(0, 0, 2, 3, 2, 4, data[..(6 * 4)]);
         new AverageFloatSampler().Sample(info, result);
         Assert.AreEqual(new Color(0.5833333f, 0.5f, 0.291666657f, 0.25f), new Color(result[0], result[1], result[2], result[3]));
 
-        info = new SamplerInfo<float>(16, 16, data);
+        info = new SamplerInfo<float>(0, 0, 16, 16, 16, 4, data);
         new AverageFloatSampler().Sample(info, result);
         Assert.AreEqual(new Color(0.5019531f, 0.40234375f, 0.3486328f, 0.298828125f), new Color(result[0], result[1], result[2], result[3]));
     }