From 581763c36392e28ed6e05690ff84b66da5882e78 Mon Sep 17 00:00:00 2001
From: atravita-mods <94934860+atravita-mods@users.noreply.github.com>
Date: Tue, 16 Aug 2022 16:46:10 -0400
Subject: [PATCH] Skip math if above is fully opaque.

---
 src/SMAPI/Framework/Content/AssetDataForImage.cs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/SMAPI/Framework/Content/AssetDataForImage.cs b/src/SMAPI/Framework/Content/AssetDataForImage.cs
index 46c2a22e..ea04f57a 100644
--- a/src/SMAPI/Framework/Content/AssetDataForImage.cs
+++ b/src/SMAPI/Framework/Content/AssetDataForImage.cs
@@ -160,13 +160,13 @@ namespace StardewModdingAPI.Framework.Content
                 // merge pixels
                 for (int i = 0; i < pixelCount; i++)
                 {
-                    ref Color above = ref sourceData[i];
-                    ref Color below = ref mergedData[i];
+                    Color above = sourceData[i];
+                    Color below = mergedData[i];
 
                     // shortcut transparency
                     if (above.A < MinOpacity)
                         continue;
-                    if (below.A < MinOpacity)
+                    if (below.A < MinOpacity || above.A == byte.MaxValue)
                         mergedData[i] = above;
 
                     // merge pixels