From 2ee7ef76898d8269c9f9c9ff4bbce57ab4b37fea Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Mon, 5 Nov 2018 17:07:11 +0100
Subject: [PATCH] [dxbc] Enable sample shading when using interpolation
 functions

Fixes artifacts on RADV when enabling MSAA in World of Warcraft (#456).
---
 src/dxbc/dxbc_compiler.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/dxbc/dxbc_compiler.cpp b/src/dxbc/dxbc_compiler.cpp
index 3a4c234c..9c06360e 100644
--- a/src/dxbc/dxbc_compiler.cpp
+++ b/src/dxbc/dxbc_compiler.cpp
@@ -2798,9 +2798,12 @@ namespace dxvk {
   
   
   void DxbcCompiler::emitInterpolate(const DxbcShaderInstruction& ins) {
+    m_module.enableCapability(spv::CapabilityInterpolationFunction);
+    m_module.enableCapability(spv::CapabilitySampleRateShading);
+
     // The SPIR-V instructions operate on input variable pointers,
     // which are all declared as four-component float vectors.
-    const uint32_t registerId = ins.src[0].idx[0].offset;
+    uint32_t registerId = ins.src[0].idx[0].offset;
     
     DxbcRegisterValue result;
     result.type = getInputRegType(registerId);
@@ -6125,7 +6128,6 @@ namespace dxvk {
   
   void DxbcCompiler::emitPsInit() {
     m_module.enableCapability(spv::CapabilityDerivativeControl);
-    m_module.enableCapability(spv::CapabilityInterpolationFunction);
     
     m_module.setExecutionMode(m_entryPointId,
       spv::ExecutionModeOriginUpperLeft);