From 3eb96fb9e576e0ad425efe1d42cdf798f72c3ca9 Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Thu, 16 Jan 2025 16:29:19 +0100
Subject: [PATCH] [d3d11] Stub out ID3DLowLatencyDevice for D3D11

---
 src/d3d11/d3d11_device.cpp | 70 ++++++++++++++++++++++++++++++++++++++
 src/d3d11/d3d11_device.h   | 46 +++++++++++++++++++++++++
 2 files changed, 116 insertions(+)

diff --git a/src/d3d11/d3d11_device.cpp b/src/d3d11/d3d11_device.cpp
index 308c4674b..a33379f96 100644
--- a/src/d3d11/d3d11_device.cpp
+++ b/src/d3d11/d3d11_device.cpp
@@ -3058,6 +3058,70 @@ namespace dxvk {
 
 
 
+  D3D11ReflexDevice::D3D11ReflexDevice(
+          D3D11DXGIDevice*        pContainer,
+          D3D11Device*            pDevice)
+  : m_container(pContainer), m_device(pDevice) {
+
+  }
+
+
+  D3D11ReflexDevice::~D3D11ReflexDevice() {
+
+  }
+
+
+  ULONG STDMETHODCALLTYPE D3D11ReflexDevice::AddRef() {
+    return m_container->AddRef();
+  }
+
+
+  ULONG STDMETHODCALLTYPE D3D11ReflexDevice::Release() {
+    return m_container->Release();
+  }
+
+
+  HRESULT STDMETHODCALLTYPE D3D11ReflexDevice::QueryInterface(
+          REFIID                        riid,
+          void**                        ppvObject) {
+    return m_container->QueryInterface(riid, ppvObject);
+  }
+
+
+  BOOL STDMETHODCALLTYPE D3D11ReflexDevice::SupportsLowLatency() {
+    return FALSE;
+  }
+
+
+  HRESULT STDMETHODCALLTYPE D3D11ReflexDevice::LatencySleep() {
+    return E_NOTIMPL;
+  }
+
+
+  HRESULT STDMETHODCALLTYPE D3D11ReflexDevice::SetLatencySleepMode(
+          BOOL                          LowLatencyEnable,
+          BOOL                          LowLatencyBoost,
+          UINT32                        MinIntervalUs) {
+    return E_NOTIMPL;
+  }
+
+
+  HRESULT STDMETHODCALLTYPE D3D11ReflexDevice::SetLatencyMarker(
+          UINT64                        FrameId,
+          UINT32                        MarkerType) {
+    return E_NOTIMPL;
+  }
+
+
+  HRESULT STDMETHODCALLTYPE D3D11ReflexDevice::GetLatencyInfo(
+          D3D_LOW_LATENCY_RESULTS*      pLowLatencyResults) {
+    *pLowLatencyResults = D3D_LOW_LATENCY_RESULTS();
+    return E_NOTIMPL;
+  }
+
+
+
+
   DXGIVkSwapChainFactory::DXGIVkSwapChainFactory(
           D3D11DXGIDevice*        pContainer,
           D3D11Device*            pDevice)
@@ -3159,6 +3223,7 @@ namespace dxvk {
     m_d3d11DeviceExt(this, &m_d3d11Device),
     m_d3d11Interop  (this, &m_d3d11Device),
     m_d3d11Video    (this, &m_d3d11Device),
+    m_d3d11Reflex   (this, &m_d3d11Device),
     m_d3d11on12     (this, &m_d3d11Device, pD3D12Device, pD3D12Queue),
     m_metaDevice    (this),
     m_dxvkFactory   (this, &m_d3d11Device) {
@@ -3231,6 +3296,11 @@ namespace dxvk {
       return S_OK;
     }
 
+    if (riid == __uuidof(ID3DLowLatencyDevice)) {
+      *ppvObject = ref(&m_d3d11Reflex);
+      return S_OK;
+    }
+
     if (m_d3d11on12.Is11on12Device()) {
       if (riid == __uuidof(ID3D11On12Device)) {
         *ppvObject = ref(&m_d3d11on12);
diff --git a/src/d3d11/d3d11_device.h b/src/d3d11/d3d11_device.h
index f07cf7489..7adcf0db6 100644
--- a/src/d3d11/d3d11_device.h
+++ b/src/d3d11/d3d11_device.h
@@ -751,6 +751,51 @@ namespace dxvk {
   };
 
 
+  /**
+   * \brief Nvidia Reflex interop
+   */
+  class D3D11ReflexDevice : public ID3DLowLatencyDevice {
+
+  public:
+
+    D3D11ReflexDevice(
+            D3D11DXGIDevice*        pContainer,
+            D3D11Device*            pDevice);
+
+    ~D3D11ReflexDevice();
+
+    ULONG STDMETHODCALLTYPE AddRef();
+
+    ULONG STDMETHODCALLTYPE Release();
+
+    HRESULT STDMETHODCALLTYPE QueryInterface(
+            REFIID                        riid,
+            void**                        ppvObject);
+
+    BOOL STDMETHODCALLTYPE SupportsLowLatency();
+
+    HRESULT STDMETHODCALLTYPE LatencySleep();
+
+    HRESULT STDMETHODCALLTYPE SetLatencySleepMode(
+            BOOL                          LowLatencyEnable,
+            BOOL                          LowLatencyBoost,
+            UINT32                        MinIntervalUs);
+
+    HRESULT STDMETHODCALLTYPE SetLatencyMarker(
+            UINT64                        FrameId,
+            UINT32                        MarkerType);
+
+    HRESULT STDMETHODCALLTYPE GetLatencyInfo(
+            D3D_LOW_LATENCY_RESULTS*      pLowLatencyResults);
+
+  private:
+
+    D3D11DXGIDevice*  m_container;
+    D3D11Device*      m_device;
+
+  };
+
+
   /**
    * \brief DXVK swap chain factory
    */
@@ -914,6 +959,7 @@ namespace dxvk {
     D3D11DeviceExt      m_d3d11DeviceExt;
     D3D11VkInterop      m_d3d11Interop;
     D3D11VideoDevice    m_d3d11Video;
+    D3D11ReflexDevice   m_d3d11Reflex;
     D3D11on12Device     m_d3d11on12;
     DXGIDXVKDevice      m_metaDevice;