[d3d11] Enable Conservative Rasterization Tier 3conservative-tier-3

Mostly to bring this in line with vkd3d-proton.

2 files changed, 9 insertions, 1 deletions

diff --git a/src/d3d11/d3d11_device.cpp b/src/d3d11/d3d11_device.cpp
index be7c275b..120a2bc3 100644
--- a/src/d3d11/d3d11_device.cpp
+++ b/src/d3d11/d3d11_device.cpp
@@ -1966,6 +1966,10 @@ namespace dxvk {
       || !m_dxvkDevice->features().vk12.shaderOutputLayer))
       return E_INVALIDARG;
 
+    if (shader->flags().test(DxvkShaderFlag::UsesFragmentCoverage)
+     && !m_dxvkDevice->properties().extConservativeRasterization.fullyCoveredFragmentShaderInputVariable)
+      return E_INVALIDARG;
+
     *pShaderModule = std::move(commonShader);
     return S_OK;
   }
diff --git a/src/d3d11/d3d11_features.cpp b/src/d3d11/d3d11_features.cpp
index 65b21b00..a3fe2cce 100644
--- a/src/d3d11/d3d11_features.cpp
+++ b/src/d3d11/d3d11_features.cpp
@@ -196,7 +196,11 @@ namespace dxvk {
     if (!m_properties.extConservativeRasterization.degenerateTrianglesRasterized)
       return D3D11_CONSERVATIVE_RASTERIZATION_TIER_1;
 
-    return D3D11_CONSERVATIVE_RASTERIZATION_TIER_2;
+    // Inner coverage is required for Tier 3 support
+    if (!m_properties.extConservativeRasterization.fullyCoveredFragmentShaderInputVariable)
+      return D3D11_CONSERVATIVE_RASTERIZATION_TIER_2;
+
+    return D3D11_CONSERVATIVE_RASTERIZATION_TIER_3;
   }