From 1fe84d52eab764bbd5df61a3763e96ea9912fa55 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Thu, 13 Apr 2017 16:37:20 +1000
Subject: [PATCH] Fix non-dithered Wu output

---
 src/ImageSharp/Quantizers/WuQuantizer.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/ImageSharp/Quantizers/WuQuantizer.cs b/src/ImageSharp/Quantizers/WuQuantizer.cs
index 9881b866a..fdf8e4136 100644
--- a/src/ImageSharp/Quantizers/WuQuantizer.cs
+++ b/src/ImageSharp/Quantizers/WuQuantizer.cs
@@ -291,6 +291,7 @@ namespace ImageSharp.Quantizers
         /// <param name="b">The blue value.</param>
         /// <param name="a">The alpha value.</param>
         /// <returns>The index.</returns>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private static int GetPaletteIndex(int r, int g, int b, int a)
         {
             return (r << ((IndexBits * 2) + IndexAlphaBits)) + (r << (IndexBits + IndexAlphaBits + 1))
@@ -841,7 +842,7 @@ namespace ImageSharp.Quantizers
             int b = this.rgbaBuffer[2] >> (8 - IndexBits);
             int a = this.rgbaBuffer[3] >> (8 - IndexAlphaBits);
 
-            return (byte)GetPaletteIndex(r + 1, g + 1, b + 1, a + 1);
+            return this.tag[GetPaletteIndex(r + 1, g + 1, b + 1, a + 1)];
         }
     }
 }
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