Introduce Numerics class and Refactor Clamp Utils

src/ImageSharp/Color/Color.cs

@@ -27,19 +27,19 @@ namespace SixLabors.ImageSharp
         private Color(byte r, byte g, byte b, byte a)
         {
             this.data = new Rgba64(
-                ImageMaths.UpscaleFrom8BitTo16Bit(r),
-                ImageMaths.UpscaleFrom8BitTo16Bit(g),
-                ImageMaths.UpscaleFrom8BitTo16Bit(b),
-                ImageMaths.UpscaleFrom8BitTo16Bit(a));
+                ColorNumerics.UpscaleFrom8BitTo16Bit(r),
+                ColorNumerics.UpscaleFrom8BitTo16Bit(g),
+                ColorNumerics.UpscaleFrom8BitTo16Bit(b),
+                ColorNumerics.UpscaleFrom8BitTo16Bit(a));
         }
 
         [MethodImpl(InliningOptions.ShortMethod)]
         private Color(byte r, byte g, byte b)
         {
             this.data = new Rgba64(
-                ImageMaths.UpscaleFrom8BitTo16Bit(r),
-                ImageMaths.UpscaleFrom8BitTo16Bit(g),
-                ImageMaths.UpscaleFrom8BitTo16Bit(b),
+                ColorNumerics.UpscaleFrom8BitTo16Bit(r),
+                ColorNumerics.UpscaleFrom8BitTo16Bit(g),
+                ColorNumerics.UpscaleFrom8BitTo16Bit(b),
                 ushort.MaxValue);
         }
 

src/ImageSharp/ColorSpaces/Cmyk.cs

@@ -59,7 +59,7 @@ public Cmyk(float c, float m, float y, float k)
         [MethodImpl(InliningOptions.ShortMethod)]
         public Cmyk(Vector4 vector)
         {
-            vector = Vector4Utilities.FastClamp(vector, Min, Max);
+            vector = Numerics.Clamp(vector, Min, Max);
             this.C = vector.X;
             this.M = vector.Y;
             this.Y = vector.Z;

src/ImageSharp/ColorSpaces/Companding/LCompanding.cs

@@ -24,7 +24,7 @@ public static class LCompanding
         /// <returns>The <see cref="float"/> representing the linear channel value.</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public static float Expand(float channel)
-            => channel <= 0.08F ? (100F * channel) / CieConstants.Kappa : ImageMaths.Pow3((channel + 0.16F) / 1.16F);
+            => channel <= 0.08F ? (100F * channel) / CieConstants.Kappa : Numerics.Pow3((channel + 0.16F) / 1.16F);
 
         /// <summary>
         /// Compresses an uncompanded channel (linear) to its nonlinear equivalent.

src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieLabToCieXyzConverter.cs

@@ -25,11 +25,11 @@ public CieXyz Convert(in CieLab input)
             float fx = (a / 500F) + fy;
             float fz = fy - (b / 200F);
 
-            float fx3 = ImageMaths.Pow3(fx);
-            float fz3 = ImageMaths.Pow3(fz);
+            float fx3 = Numerics.Pow3(fx);
+            float fz3 = Numerics.Pow3(fz);
 
             float xr = fx3 > CieConstants.Epsilon ? fx3 : ((116F * fx) - 16F) / CieConstants.Kappa;
-            float yr = l > CieConstants.Kappa * CieConstants.Epsilon ? ImageMaths.Pow3((l + 16F) / 116F) : l / CieConstants.Kappa;
+            float yr = l > CieConstants.Kappa * CieConstants.Epsilon ? Numerics.Pow3((l + 16F) / 116F) : l / CieConstants.Kappa;
             float zr = fz3 > CieConstants.Epsilon ? fz3 : ((116F * fz) - 16F) / CieConstants.Kappa;
 
             var wxyz = new Vector3(input.WhitePoint.X, input.WhitePoint.Y, input.WhitePoint.Z);

src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/CieLuvToCieXyzConverter.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors.
+// Copyright (c) Six Labors.
 // Licensed under the Apache License, Version 2.0.
 
 using System.Runtime.CompilerServices;
@@ -24,7 +24,7 @@ public CieXyz Convert(in CieLuv input)
             float v0 = ComputeV0(input.WhitePoint);
 
             float y = l > CieConstants.Kappa * CieConstants.Epsilon
-                        ? ImageMaths.Pow3((l + 16) / 116)
+                        ? Numerics.Pow3((l + 16) / 116)
                         : l / CieConstants.Kappa;
 
             float a = ((52 * l / (u + (13 * l * u0))) - 1) / 3;
@@ -71,4 +71,4 @@ private static float ComputeU0(in CieXyz input)
         private static float ComputeV0(in CieXyz input)
             => (9 * input.Y) / (input.X + (15 * input.Y) + (3 * input.Z));
     }
-}
+}

src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/HunterLabToCieXyzConverter.cs

@@ -26,7 +26,7 @@ public CieXyz Convert(in HunterLab input)
             float ka = ComputeKa(input.WhitePoint);
             float kb = ComputeKb(input.WhitePoint);
 
-            float pow = ImageMaths.Pow2(l / 100F);
+            float pow = Numerics.Pow2(l / 100F);
             float sqrtPow = MathF.Sqrt(pow);
             float y = pow * yn;
 

src/ImageSharp/Common/Helpers/Buffer2DUtils.cs

@@ -50,8 +50,8 @@ public static void Convolve4<TPixel>(
 
             for (int i = 0; i < kernelLength; i++)
             {
-                int offsetY = (row + i - radiusY).Clamp(minRow, maxRow);
-                int offsetX = sourceOffsetColumnBase.Clamp(minColumn, maxColumn);
+                int offsetY = Numerics.Clamp(row + i - radiusY, minRow, maxRow);
+                int offsetX = Numerics.Clamp(sourceOffsetColumnBase, minColumn, maxColumn);
                 Span<TPixel> sourceRowSpan = sourcePixels.GetRowSpan(offsetY);
                 var currentColor = sourceRowSpan[offsetX].ToVector4();
 
@@ -93,13 +93,13 @@ public static void Convolve4AndAccumulatePartials(
             int radiusX = kernelLength >> 1;
             int sourceOffsetColumnBase = column + minColumn;
 
-            int offsetY = row.Clamp(minRow, maxRow);
+            int offsetY = Numerics.Clamp(row, minRow, maxRow);
             ref ComplexVector4 sourceRef = ref MemoryMarshal.GetReference(sourceValues.GetRowSpan(offsetY));
             ref Complex64 baseRef = ref MemoryMarshal.GetReference(kernel);
 
             for (int x = 0; x < kernelLength; x++)
             {
-                int offsetX = (sourceOffsetColumnBase + x - radiusX).Clamp(minColumn, maxColumn);
+                int offsetX = Numerics.Clamp(sourceOffsetColumnBase + x - radiusX, minColumn, maxColumn);
                 vector.Sum(Unsafe.Add(ref baseRef, x) * Unsafe.Add(ref sourceRef, offsetX));
             }