Implemented base event ID the way Unity's plugin interface actually expects you to: by reserving a range during initialization and storing the base value returned by Unity.

FSR2UnityPlugin.cpp

@@ -23,8 +23,6 @@
 
 #include "FSR2UnityTypes.h"
 
-static const int32_t BaseEventId = 212;
-
 static IUnityInterfaces* s_UnityInterfaces = nullptr;
 static IUnityLog* s_Log = nullptr;
 static IUnityGraphics* s_Graphics = nullptr;
@@ -33,6 +31,7 @@ static IUnityGraphicsD3D12v7* s_GraphicsD3D12 = nullptr;
 static IUnityGraphicsVulkanV2* s_GraphicsVulkan = nullptr;
 static UnityGfxRenderer s_RendererType = kUnityGfxRendererNull;
 
+static int32_t s_BaseEventId = 0;
 static FfxDevice s_Device = nullptr;
 static FfxFsr2Interface s_Fsr2Interface;
 
@@ -64,6 +63,8 @@ extern "C" void UNITY_INTERFACE_EXPORT UNITY_INTERFACE_API UnityPluginLoad(IUnit
     s_Log = unityInterfaces->Get<IUnityLog>();
     s_Graphics = unityInterfaces->Get<IUnityGraphics>();
 
+    s_BaseEventId = s_Graphics->ReserveEventIDRange((int)ePluginEventCount);
+
     s_Graphics->RegisterDeviceEventCallback(OnGraphicsDeviceEvent);
 
     // Run OnGraphicsDeviceEvent(initialize) manually on plugin load
@@ -111,7 +112,7 @@ static void UNITY_INTERFACE_API OnGraphicsDeviceEvent(UnityGfxDeviceEventType ev
             eventConfig.graphicsQueueAccess = kUnityD3D12GraphicsQueueAccess_DontCare;
             eventConfig.flags = kUnityD3D12EventConfigFlag_EnsurePreviousFrameSubmission | kUnityD3D12EventConfigFlag_FlushCommandBuffers | kUnityD3D12EventConfigFlag_SyncWorkerThreads | kUnityD3D12EventConfigFlag_ModifiesCommandBuffersState;
             eventConfig.ensureActiveRenderTextureIsBound = false;
-            s_GraphicsD3D12->ConfigureEvent(BaseEventId + FSR2PluginEvent::eExecute, &eventConfig);
+            s_GraphicsD3D12->ConfigureEvent(s_BaseEventId + FSR2PluginEvent::eExecute, &eventConfig);
             break;
         }
         case kUnityGfxRendererVulkan:
@@ -127,7 +128,7 @@ static void UNITY_INTERFACE_API OnGraphicsDeviceEvent(UnityGfxDeviceEventType ev
             eventConfig.graphicsQueueAccess = kUnityVulkanGraphicsQueueAccess_DontCare;
             eventConfig.flags = kUnityVulkanEventConfigFlag_EnsurePreviousFrameSubmission | kUnityVulkanEventConfigFlag_FlushCommandBuffers | kUnityVulkanEventConfigFlag_SyncWorkerThreads | kUnityVulkanEventConfigFlag_ModifiesCommandBuffersState;
             eventConfig.renderPassPrecondition = kUnityVulkanRenderPass_EnsureInside;
-            s_GraphicsVulkan->ConfigureEvent(BaseEventId + FSR2PluginEvent::eExecute, &eventConfig);
+            s_GraphicsVulkan->ConfigureEvent(s_BaseEventId + FSR2PluginEvent::eExecute, &eventConfig);
             break;
         }
         };
@@ -360,7 +361,7 @@ extern "C" bool UNITY_INTERFACE_EXPORT UNITY_INTERFACE_API AMDUP_GetRenderResolu
 
 extern "C" int32_t UNITY_INTERFACE_EXPORT UNITY_INTERFACE_API AMDUP_GetBaseEventId()
 {
-    return BaseEventId;
+    return s_BaseEventId;
 }
 
 static FfxResource GetVulkanTextureResource(UnityVulkanInstance& instance, FSR2Feature& feature, FSR2TextureDesc& texture, FfxResourceStates state = FFX_RESOURCE_STATE_COMPUTE_READ)
@@ -401,9 +402,9 @@ static void UNITY_INTERFACE_API OnRenderEventAndData(int eventID, void* data)
         return;
 
     // User rendering code
-    switch (eventID)
+    switch (eventID - s_BaseEventId)
     {
-    case BaseEventId + FSR2PluginEvent::eDestroyFeature:
+    case FSR2PluginEvent::eDestroyFeature:
     {
         uint32_t featureSlot = (uint32_t)(int64_t)data;
         if (featureSlot < 0 || featureSlot >= s_Features.size())
@@ -412,7 +413,7 @@ static void UNITY_INTERFACE_API OnRenderEventAndData(int eventID, void* data)
         DestroyFeature(featureSlot);
         break;
     }
-    case BaseEventId + FSR2PluginEvent::eExecute:
+    case FSR2PluginEvent::eExecute:
     {
         std::lock_guard<std::mutex> lock(s_FeatureMutex);
 
@@ -512,7 +513,7 @@ static void UNITY_INTERFACE_API OnRenderEventAndData(int eventID, void* data)
         ffxFsr2ContextDispatch(&feature.upscalingContext, &dispatchDescription);
         break;
     }
-    case BaseEventId + FSR2PluginEvent::ePostExecute:
+    case FSR2PluginEvent::ePostExecute:
     {
         std::lock_guard<std::mutex> lock(s_FeatureMutex);
 
@@ -536,7 +537,7 @@ static void UNITY_INTERFACE_API OnRenderEventAndData(int eventID, void* data)
 
         break;
     }
-    case BaseEventId + FSR2PluginEvent::eInit:
+    case FSR2PluginEvent::eInit:
     {
         std::lock_guard<std::mutex> lock(s_FeatureMutex);
 

FSR2UnityTypes.h

@@ -5,7 +5,9 @@ enum FSR2PluginEvent : int32_t
 	eDestroyFeature,
 	eExecute,
 	ePostExecute,
-	eInit
+	eInit,
+
+	ePluginEventCount
 };
 
 enum FSR2Quality: int32_t