From 0eaad2eb5b26ea5f512d02d724bdc22d458ca06b Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Sat, 30 Jul 2022 22:14:26 +0200
Subject: [PATCH] [dxso] Don't create shader object for redundant PS
 permutations

---
 src/d3d9/d3d9_shader.cpp   | 2 +-
 src/dxso/dxso_compiler.cpp | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/d3d9/d3d9_shader.cpp b/src/d3d9/d3d9_shader.cpp
index 8b5bb8bd6..664ebbdbc 100644
--- a/src/d3d9/d3d9_shader.cpp
+++ b/src/d3d9/d3d9_shader.cpp
@@ -90,7 +90,7 @@ namespace dxvk {
 
     pDevice->GetDXVKDevice()->registerShader(m_shaders[0]);
 
-    if (m_shaders[1] != nullptr)
+    if (m_shaders[1] != nullptr && m_shaders[1] != m_shaders[0])
       pDevice->GetDXVKDevice()->registerShader(m_shaders[1]);
   }
 
diff --git a/src/dxso/dxso_compiler.cpp b/src/dxso/dxso_compiler.cpp
index 289ef90ed..69f77e5b0 100644
--- a/src/dxso/dxso_compiler.cpp
+++ b/src/dxso/dxso_compiler.cpp
@@ -236,7 +236,10 @@ namespace dxvk {
       if (m_ps.specularColorIn)
         m_module.decorate(m_ps.specularColorIn, spv::DecorationFlat);
 
-      permutations[D3D9ShaderPermutations::FlatShade] = compileShader();
+      if (m_ps.diffuseColorIn || m_ps.specularColorIn)
+        permutations[D3D9ShaderPermutations::FlatShade] = compileShader();
+      else
+        permutations[D3D9ShaderPermutations::FlatShade] = permutations[D3D9ShaderPermutations::None];
     }
 
     return permutations;