From 274e175145cf032e2fb114a35656aeec9d7da2ed Mon Sep 17 00:00:00 2001 From: James Jackson-South Date: Thu, 7 Dec 2017 14:59:14 +1100 Subject: [PATCH] Use Vector4.Dot where we can --- .../Quantizers/WuQuantizer{TPixel}.cs | 20 +++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/src/ImageSharp/Quantizers/WuQuantizer{TPixel}.cs b/src/ImageSharp/Quantizers/WuQuantizer{TPixel}.cs index 11d9bd5db..ba1a3c165 100644 --- a/src/ImageSharp/Quantizers/WuQuantizer{TPixel}.cs +++ b/src/ImageSharp/Quantizers/WuQuantizer{TPixel}.cs @@ -579,8 +579,8 @@ namespace SixLabors.ImageSharp.Quantizers - this.m2[GetPaletteIndex(cube.R0, cube.G0, cube.B0, cube.A1)] + this.m2[GetPaletteIndex(cube.R0, cube.G0, cube.B0, cube.A0)]; - // TODO: Vector.Dot - return xx - (((dr * dr) + (dg * dg) + (db * db) + (da * da)) / Volume(ref cube, this.vwt)); + var vector = new Vector4(dr, dg, db, da); + return xx - (Vector4.Dot(vector, vector) / Volume(ref cube, this.vwt)); } /// @@ -625,12 +625,9 @@ namespace SixLabors.ImageSharp.Quantizers continue; } - float temp = ((halfR * halfR) + (halfG * halfG) + (halfB * halfB) + (halfA * halfA)) / halfW; + var vector = new Vector4(halfR, halfG, halfB, halfA); + float temp = Vector4.Dot(vector, vector) / halfW; - halfR = wholeR - halfR; - halfG = wholeG - halfG; - halfB = wholeB - halfB; - halfA = wholeA - halfA; halfW = wholeW - halfW; if (MathF.Abs(halfW) < Constants.Epsilon) @@ -638,7 +635,14 @@ namespace SixLabors.ImageSharp.Quantizers continue; } - temp += ((halfR * halfR) + (halfG * halfG) + (halfB * halfB) + (halfA * halfA)) / halfW; + halfR = wholeR - halfR; + halfG = wholeG - halfG; + halfB = wholeB - halfB; + halfA = wholeA - halfA; + + vector = new Vector4(halfR, halfG, halfB, halfA); + + temp += Vector4.Dot(vector, vector) / halfW; if (temp > max) {