From ba4d1df1e1886081f0ef4918237a0fb5a6c9d4fe Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Fri, 17 Jul 2026 15:52:50 +1000
Subject: [PATCH] Potential fix for pull request finding 'Equality check on
 floating point values'

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>
---
 .../Utils/Vector4Converters.AssociatedRgbaCompatible.cs       | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.AssociatedRgbaCompatible.cs b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.AssociatedRgbaCompatible.cs
index b47779df8..05fd97ab4 100644
--- a/src/ImageSharp/PixelFormats/Utils/Vector4Converters.AssociatedRgbaCompatible.cs
+++ b/src/ImageSharp/PixelFormats/Utils/Vector4Converters.AssociatedRgbaCompatible.cs
@@ -371,8 +371,10 @@ internal static partial class Vector4Converters
 
             float byteAlpha = alpha * byte.MaxValue;
             float storedAlpha = (byte)Numerics.Clamp(byteAlpha + 0.5F, 0, byte.MaxValue);
+            byte quantizedAlpha = (byte)storedAlpha;
+            byte sourceAlphaByte = (byte)Numerics.Clamp(byteAlpha + 0.5F, 0, byte.MaxValue);
 
-            if (byteAlpha == storedAlpha)
+            if (sourceAlphaByte == quantizedAlpha)
             {
                 // Quantization leaves alpha unchanged, so RGB is already associated correctly. Avoiding division preserves exact byte midpoints produced by scaling stored components.
                 source *= byte.MaxValue;