From b3ab5ee043cca68d0955dcfa3b1cc1044dad9a93 Mon Sep 17 00:00:00 2001
From: Thomas <thomas@thomasw.dev>
Date: Tue, 28 Nov 2023 22:03:15 +0100
Subject: [PATCH] Color math: skip divide only if no layer on main screen

---
 src/snes/ppu/render.rs | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/snes/ppu/render.rs b/src/snes/ppu/render.rs
index 3703bb9..fbf7f4c 100644
--- a/src/snes/ppu/render.rs
+++ b/src/snes/ppu/render.rs
@@ -370,9 +370,7 @@ where
             return pixel;
         }
 
-        let div2 = self.cgadsub & (1 << 6) != 0
-            && sublayer != LAYER_BACKDROP
-            && mainlayer != LAYER_BACKDROP;
+        let div2 = self.cgadsub & (1 << 6) != 0 && sublayer != LAYER_BACKDROP;
         if self.cgadsub & (1 << 7) == 0 {
             // Add mode
             pixel = pixel.cm_add(&subclr, div2);