Add support for the FSR 3 MFG mod

Download the mod, rename it to fsr3fg_mfg.asi and place next to Opti. Select Nukem's as FG input as it works in the same way.

OptiScaler/NVNGX_Parameter.h

@@ -530,7 +530,15 @@ inline static void InitNGXParameters(NVSDK_NGX_Parameter* InParams)
         InParams->Set("FrameInterpolation.Available", 1);
         InParams->Set(NVSDK_NGX_Parameter_FrameInterpolation_NeedsUpdatedDriver, 0);
         InParams->Set(NVSDK_NGX_Parameter_FrameInterpolation_FeatureInitResult, 1);
-        InParams->Set("DLSSG.MultiFrameCountMax", 1);
+
+        if (State::Instance().NukemsMFG)
+        {
+            InParams->Set("DLSSG.MultiFrameCountMax", 3);
+        }
+        else
+        {
+            InParams->Set("DLSSG.MultiFrameCountMax", 1);
+        }
 
         if (State::Instance().NVNGX_Engine == NVSDK_NGX_ENGINE_TYPE_UNREAL ||
             State::Instance().gameQuirks & GameQuirk::ForceUnrealEngine)

OptiScaler/State.h

@@ -85,6 +85,7 @@ class State
 
     // DLSSG
     bool NukemsFilesAvailable = false;
+    bool NukemsMFG = false;
     bool DLSSGDebugView = false;
     bool DLSSGInterpolatedOnly = false;
     uint32_t delayMenuRenderBy = 0;

OptiScaler/hooks/Advapi32_Hooks.h

@@ -22,8 +22,10 @@ static PFN_RegQueryValueExA o_RegQueryValueExA = nullptr;
 VALIDATE_HOOK(hkRegOpenKeyExW, PFN_RegOpenKeyExW)
 static LSTATUS hkRegOpenKeyExW(HKEY hKey, LPCWSTR lpSubKey, DWORD ulOptions, REGSAM samDesired, PHKEY phkResult)
 {
-    if (lpSubKey != nullptr && (wcscmp(L"SOFTWARE\\NVIDIA Corporation\\Global", lpSubKey) == 0 ||
-                                wcscmp(L"SYSTEM\\ControlSet001\\Services\\nvlddmkm", lpSubKey) == 0))
+    if (lpSubKey != nullptr &&
+        (wcscmp(L"SOFTWARE\\NVIDIA Corporation\\Global", lpSubKey) == 0 ||
+         wcscmp(L"SYSTEM\\ControlSet001\\Services\\nvlddmkm", lpSubKey) == 0) &&
+        !State::Instance().NukemsMFG)
     {
         *phkResult = signatureMark;
         return 0;

OptiScaler/inputs/FG/DLSSG_Mod.h

@@ -51,7 +51,7 @@ class DLSSGMod
     // DLSSGTOFSR3_EnableInterpolatedFramesOnly
     static inline void setSetting(const wchar_t* setting, const wchar_t* value)
     {
-        if (is120orNewer())
+        if (is120orNewer() && !State::Instance().NukemsMFG)
         {
             SetEnvironmentVariable(setting, value);
             _refreshGlobalConfiguration();
@@ -66,8 +66,40 @@ class DLSSGMod
         if (_dx12_inited || Config::Instance()->FGInput.value_or_default() != FGInput::Nukems)
             return;
 
-        if (_dll == nullptr)
+        auto dllPath = Util::DllPath().parent_path() / "fsr3fg_mfg.asi";
+
+        // set early so the hooks know
+        State::Instance().NukemsMFG = true;
+        _dll = NtdllProxy::LoadLibraryExW_Ldr(dllPath.c_str(), NULL, 0);
+
+        if (_dll != nullptr)
         {
+            _DLSSG_D3D12_Init = (PFN_D3D12_Init) GetProcAddress(_dll, "DLSSG_NVSDK_NGX_D3D12_Init");
+            _DLSSG_D3D12_Init_Ext = (PFN_D3D12_Init_Ext) GetProcAddress(_dll, "DLSSG_NVSDK_NGX_D3D12_Init_Ext");
+            _DLSSG_D3D12_Shutdown = (PFN_D3D12_Shutdown) GetProcAddress(_dll, "DLSSG_NVSDK_NGX_D3D12_Shutdown");
+            _DLSSG_D3D12_Shutdown1 = (PFN_D3D12_Shutdown1) GetProcAddress(_dll, "DLSSG_NVSDK_NGX_D3D12_Shutdown1");
+            _DLSSG_D3D12_GetScratchBufferSize =
+                (PFN_D3D12_GetScratchBufferSize) GetProcAddress(_dll, "DLSSG_NVSDK_NGX_D3D12_GetScratchBufferSize");
+            _DLSSG_D3D12_CreateFeature =
+                (PFN_D3D12_CreateFeature) GetProcAddress(_dll, "DLSSG_NVSDK_NGX_D3D12_CreateFeature");
+            _DLSSG_D3D12_ReleaseFeature =
+                (PFN_D3D12_ReleaseFeature) GetProcAddress(_dll, "DLSSG_NVSDK_NGX_D3D12_ReleaseFeature");
+            _DLSSG_D3D12_GetFeatureRequirements =
+                (PFN_D3D12_GetFeatureRequirements) GetProcAddress(_dll, "DLSSG_NVSDK_NGX_D3D12_GetFeatureRequirements");
+            _DLSSG_D3D12_EvaluateFeature =
+                (PFN_D3D12_EvaluateFeature) GetProcAddress(_dll, "DLSSG_NVSDK_NGX_D3D12_EvaluateFeature");
+            _DLSSG_D3D12_PopulateParameters_Impl = (PFN_D3D12_PopulateParameters_Impl) GetProcAddress(
+                _dll, "DLSSG_NVSDK_NGX_D3D12_PopulateParameters_Impl");
+            _dx12_inited = true;
+
+            LOG_INFO("DLSSG MFG Mod initialized for DX12");
+
+            return;
+        }
+        else
+        {
+            State::Instance().NukemsMFG = false;
+
             auto dllPath = Util::DllPath().parent_path() / "dlssg_to_fsr3_amd_is_better.dll";
             _dll = NtdllProxy::LoadLibraryExW_Ldr(dllPath.c_str(), NULL, 0);
         }

OptiScaler/menu/menu_common.cpp

@@ -3970,7 +3970,8 @@ bool MenuCommon::RenderMenu()
                 }
 
                 // Nukems Mod
-                if (state.activeFgInput == FGInput::Nukems && state.activeFgOutput == FGOutput::Nukems)
+                if (state.activeFgInput == FGInput::Nukems && state.activeFgOutput == FGOutput::Nukems &&
+                    !State::Instance().NukemsMFG)
                 {
                     SeparatorWithHelpMarker("Frame Generation (FSR3-FG via Nukem's DLSSG)",
                                             "Requires Nukem's dlssg_to_fsr3 dll\nSelect DLSS-FG in-game");
@@ -4035,6 +4036,13 @@ bool MenuCommon::RenderMenu()
                     }
                 }
 
+                if (state.activeFgInput == FGInput::Nukems && state.activeFgOutput == FGOutput::Nukems &&
+                    State::Instance().NukemsMFG)
+                {
+                    ImGui::Text(
+                        "Using Nukem's via the MFG mod from fsr3fg_mfg.asi\nSelect MFG from the game's options");
+                }
+
                 // FSR-FG Inputs
                 if (state.currentFGSwapchain != nullptr &&
                     (state.activeFgInput == FGInput::FSRFG || state.activeFgInput == FGInput::FSRFG30))