From b29cd27c1031a08fb78c50658fed9c8fabf23181 Mon Sep 17 00:00:00 2001
From: Gerard Gunnewijk <gerard.gunnewijk@fotofabriek.nl>
Date: Wed, 7 Jun 2023 15:55:23 +0200
Subject: [PATCH] Fixed bug in Write1BitPixelData that wrote too many bits to
 the byte

---
 src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
index fd23a29e37..ce1660a912 100644
--- a/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
+++ b/src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
@@ -668,7 +668,7 @@ internal sealed class BmpEncoderCore : IImageEncoderInternals
 
             if (quantizedPixelRow.Length % 8 != 0)
             {
-                int startIdx = quantizedPixelRow.Length - 7;
+                int startIdx = quantizedPixelRow.Length - (quantizedPixelRow.Length % 8);
                 endIdx = quantizedPixelRow.Length;
                 Write1BitPalette(stream, startIdx, endIdx, quantizedPixelRow);
             }