From 34602817b09f701610ee972ac01ff0687f13c57c Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Wed, 13 Jul 2022 10:00:24 +0200
Subject: [PATCH] Fix issue #2171: Alpha Chunk data size is not set correctly
 to the compressed size

---
 src/ImageSharp/Formats/Webp/Lossy/Vp8Encoder.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ImageSharp/Formats/Webp/Lossy/Vp8Encoder.cs b/src/ImageSharp/Formats/Webp/Lossy/Vp8Encoder.cs
index f24fdb45d8..6dcb4acd85 100644
--- a/src/ImageSharp/Formats/Webp/Lossy/Vp8Encoder.cs
+++ b/src/ImageSharp/Formats/Webp/Lossy/Vp8Encoder.cs
@@ -382,7 +382,7 @@ namespace SixLabors.ImageSharp.Formats.Webp.Lossy
                 (uint)width,
                 (uint)height,
                 hasAlpha,
-                alphaData,
+                alphaData.Slice(0, alphaDataSize),
                 this.alphaCompression && alphaCompressionSucceeded);
         }