Added support for NVIDIA Smooth Motion, provided you do not try to change a game's resolution

Author: Kaldaien

CHANGELOG.txt

@@ -1,4 +1,9 @@
-26.4.20
+26.4.22
+=======
+ + Added support for NVIDIA Smooth Motion, provided you do not try to change a
+     game's resolution; Smooth Motion leaks resources and this always fails.
+
+26.4.20
 =======
  + Fixed SK's Reflex Sleep checking native frame IDs in non-native Reflex games
 

include/SpecialK/DLL_VERSION.H

@@ -2,7 +2,7 @@
 
 #define SK_YEAR  26
 #define SK_MONTH 4
-#define SK_DATE  20
+#define SK_DATE  22
 #define SK_REV_N 0
 #define SK_REV   0
 

src/render/dxgi/dxgi.cpp

@@ -5093,6 +5093,12 @@ DXGISwap_ResizeBuffers_Override (IDXGISwapChain* This,
   SK_DXGI_FormatToStr (NewFormat).data (),
                          SwapChainFlags );
 
+  if (SK_NvAPI_IsSmoothingMotion ())
+  {
+    SK_LOGi0 (L" >> Skipping call because Smooth Motion leaks backbuffers.");
+    return S_OK;
+  }
+
   return
     SK_DXGI_SwapChain_ResizeBuffers_Impl (
       This, BufferCount, Width, Height, NewFormat, SwapChainFlags, FALSE
@@ -6724,24 +6730,6 @@ DXGIFactory_CreateSwapChain_Override (
                                    pDesc, ppSwapChain );
   }
 
-  if (SK_NvAPI_IsSmoothingMotion ())
-  {
-    extern bool __SK_HDR_Disallow16BitSwap;
-                __SK_HDR_Disallow16BitSwap = true;
-
-    if (__SK_HDR_16BitSwap)
-    {
-      __SK_HDR_10BitSwap =  true;
-      __SK_HDR_16BitSwap = false;
-
-      SK_HDR_SetOverridesForGame (__SK_HDR_16BitSwap, __SK_HDR_10BitSwap);
-
-      SK_ImGui_Warning (
-        L"scRGB HDR has been changed to HDR10 because NVIDIA Smooth Motion was detected."
-      );
-    }
-  }
-
   if (SK_GetCallingDLL () == SK_GetModuleHandleW (L"sl.dlss_g.dll") ||
                              SK_GetModuleHandleW (L"nvngx_dlssg.dll") != nullptr)
   {

src/render/dxgi/dxgi_swapchain.cpp

@@ -1009,6 +1009,12 @@ IWrapDXGISwapChain::ResizeBuffers ( UINT        BufferCount,
                                     UINT        Width,     UINT Height,
                                     DXGI_FORMAT NewFormat, UINT SwapChainFlags )
 {
+  if (SK_NvAPI_IsSmoothingMotion ())
+  {
+    SK_LOGi0 (L" >> Skipping ResizeBuffers (...) call because Smooth Motion leaks backbuffers.");
+    return S_OK;
+  }
+
   if (SK_DXGI_ZeroCopy == -1)
       SK_DXGI_ZeroCopy = (__SK_HDR_16BitSwap || __SK_HDR_10BitSwap);
 

src/render/reflex/reflex.cpp

@@ -920,7 +920,8 @@ SK_RenderBackend_V2::setLatencyMarkerNV (NV_LATENCY_MARKER_TYPE marker) const no
         markerParams.frameID    = static_cast <NvU64> (
              ReadULong64Acquire (&frames_drawn)       );
 
-      WriteULong64Release (&SK_Reflex_LastFrameId, markerParams.frameID);
+      if (markerParams.markerType != INPUT_SAMPLE) // Don't want this triggering a new frame ID
+        WriteULong64Release (&SK_Reflex_LastFrameId, markerParams.frameID);
 
       // Triggered input flash, in a Reflex-native game
       if (config.nvidia.reflex.native)

src/widgets/hdr.cpp

@@ -24,6 +24,7 @@
 #include <SpecialK/stdafx.h>
 #include <SpecialK/render/dxgi/dxgi_hdr.h>
 #include <SpecialK/render/dxgi/dxgi_util.h>
+#include <SpecialK/nvapi.h>
 #include <imgui/font_awesome.h>
 
 #ifndef __SK_SUBSYSTEM__
@@ -1008,6 +1009,23 @@ class SKWG_HDR_Control : public SK_Widget, SK_IVariableListener
     _SK_HDR_16BitSwapChain->load (__SK_HDR_16BitSwap);
 
 
+    if (SK_NvAPI_IsSmoothingMotion ())
+    {
+      extern bool __SK_HDR_Disallow16BitSwap;
+                  __SK_HDR_Disallow16BitSwap = true;
+
+      if (__SK_HDR_16BitSwap)
+      {
+        __SK_HDR_10BitSwap =  true;
+        __SK_HDR_16BitSwap = false;
+
+        SK_ImGui_Warning (
+          L"scRGB HDR has been changed to HDR10 because NVIDIA Smooth Motion was detected."
+        );
+      }
+    }
+
+
     if (__SK_HDR_Disallow16BitSwap && __SK_HDR_16BitSwap)
     {
       __SK_HDR_16BitSwap = false;