From de8d2b37bb0dfcb521730c496eab194830fdd2f9 Mon Sep 17 00:00:00 2001
From: Robin Kertels <robin.kertels@gmail.com>
Date: Sat, 13 Aug 2022 15:35:27 +0200
Subject: [PATCH] [d3d9] FF: Don't change flatShadingMask for outputs

---
 src/d3d9/d3d9_fixed_function.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/d3d9/d3d9_fixed_function.cpp b/src/d3d9/d3d9_fixed_function.cpp
index a2c2e41f7..7c7629a9b 100644
--- a/src/d3d9/d3d9_fixed_function.cpp
+++ b/src/d3d9/d3d9_fixed_function.cpp
@@ -790,7 +790,7 @@ namespace dxvk {
     bool diffuseOrSpec = semantic == DxsoSemantic{ DxsoUsage::Color, 0 }
                       || semantic == DxsoSemantic{ DxsoUsage::Color, 1 };
 
-    if (diffuseOrSpec)
+    if (diffuseOrSpec && input)
       m_flatShadingMask |= 1u << slot;
 
     std::string name = str::format(input ? "in_" : "out_", semantic.usage, semantic.usageIndex);