Added D3D Feature Level spoofing

Author: cdozdil

OptiScaler.ini

@@ -422,6 +422,10 @@ VulkanVRAM=auto
 ; true or false - Default (auto) is false, unless DLSSG mod is enabled
 SpoofHAGS=auto
 
+; Enables overriding of requested D3D feature level
+; true or false - Default (auto) is false
+D3DFeatureLevel=auto
+
 
 
 ; -------------------------------------------------------

OptiScaler/Config.h

@@ -288,6 +288,7 @@ class Config
 	CustomOptional<std::wstring> SpoofedGPUName{ L"NVIDIA GeForce RTX 4090" };
 	CustomOptional<int, NoDefault> VulkanVRAM; // disabled by default
 	CustomOptional<bool> SpoofHAGS{ false };
+	CustomOptional<bool> SpoofFeatureLevel{ false };
 
 	// Plugins
 	CustomOptional<std::wstring> PluginPath{ L"plugins" };

OptiScaler/hooks/HooksDx.cpp

@@ -3603,8 +3603,12 @@ static HRESULT hkD3D12CreateDevice(IDXGIAdapter* pAdapter, D3D_FEATURE_LEVEL Min
     }
 #endif
 
+    auto minLevel = MinimumFeatureLevel;
+    if (Config::Instance()->SpoofFeatureLevel.value_or_default())
+        minLevel = D3D_FEATURE_LEVEL_11_0;
+
     //State::Instance().skipSpoofing = true;
-    auto result = o_D3D12CreateDevice(pAdapter, MinimumFeatureLevel, riid, ppDevice);
+    auto result = o_D3D12CreateDevice(pAdapter, minLevel, riid, ppDevice);
     //State::Instance().skipSpoofing = false;
 
     if (result == S_OK && ppDevice != nullptr && *ppDevice != nullptr)