Implemented D3D12 Unity interface bits

FSR3UnityPlugin.cpp

@@ -8,7 +8,10 @@
 #include "UnityPluginAPI/IUnityLog.h"
 #include "UnityPluginAPI/IUnityGraphics.h"
 #include "UnityPluginAPI/IUnityRenderingExtensions.h"
-//#include "UnityPluginAPI/IUnityGraphicsD3D12.h"
+
+#include <d3d12.h>
+#include <dxgi.h>
+#include "UnityPluginAPI/IUnityGraphicsD3D12.h"
 
 #include "FSR3UnityTypes.h"
 
@@ -17,6 +20,7 @@ static const int32_t BaseEventId = 0;
 static IUnityInterfaces* s_UnityInterfaces = nullptr;
 static IUnityLog* s_Log = nullptr;
 static IUnityGraphics* s_Graphics = nullptr;
+static IUnityGraphicsD3D12v7* s_GraphicsD3D12 = nullptr;
 static UnityGfxRenderer s_RendererType = kUnityGfxRendererNull;
 
 static void UNITY_INTERFACE_API OnGraphicsDeviceEvent(UnityGfxDeviceEventType eventType);
@@ -59,23 +63,30 @@ static void UNITY_INTERFACE_API OnGraphicsDeviceEvent(UnityGfxDeviceEventType ev
     case kUnityGfxDeviceEventInitialize:
     {
         s_RendererType = s_Graphics->GetRenderer();
-        //TODO: user initialization code on graphics device initialization. For example, D3D11 resource creation.
+        if (s_RendererType != kUnityGfxRendererD3D12)
+            return;
+
+        s_GraphicsD3D12 = s_UnityInterfaces->Get<IUnityGraphicsD3D12v7>();
+        if (s_GraphicsD3D12 == nullptr)
+        {
+            UNITY_LOG_ERROR(s_Log, "Could not obtain D3D12 Graphics interface!");
+            return;
+        }
+
         break;
     }
     case kUnityGfxDeviceEventShutdown:
     {
+        s_GraphicsD3D12 = nullptr;
         s_RendererType = kUnityGfxRendererNull;
-        //TODO: user graphics API code to call on graphics device shutdown.
         break;
     }
     case kUnityGfxDeviceEventBeforeReset:
     {
-        //TODO: user graphics API code to call before graphics device reset.
         break;
     }
     case kUnityGfxDeviceEventAfterReset:
     {
-        //TODO: user graphics API code to call after graphics device reset.
         break;
     }
     };