From 465f49c8d39b7d4b444da999ecf9141b8f02d8ca Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Fri, 21 Aug 2020 10:46:13 +0100
Subject: [PATCH] Fix decoder

---
 src/ImageSharp/Formats/WebP/Lossless/LosslessUtils.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ImageSharp/Formats/WebP/Lossless/LosslessUtils.cs b/src/ImageSharp/Formats/WebP/Lossless/LosslessUtils.cs
index ac69906652..e8dd3c40a4 100644
--- a/src/ImageSharp/Formats/WebP/Lossless/LosslessUtils.cs
+++ b/src/ImageSharp/Formats/WebP/Lossless/LosslessUtils.cs
@@ -261,7 +261,7 @@ namespace SixLabors.ImageSharp.Formats.WebP.Lossless
 
                 // First Row follows the L (mode=1) mode.
                 PredictorAdd0(input, null, 1, output);
-                PredictorAdd1(input + 1, null, width - 1, output);
+                PredictorAdd1(input + 1, null, width - 1, output + 1);
                 input += width;
                 output += width;