Add new GPU Query API that is lightweight and supports occlusion queries

Source/Engine/GraphicsDevice/Null/GPUContextNull.h

@@ -160,6 +160,15 @@ public:
     {
     }
 
+    uint64 BeginQuery(GPUQueryType type) override
+    {
+        return 0;
+    }
+
+    void EndQuery(uint64 queryID) override
+    {
+    }
+
     void SetViewport(const Viewport& viewport) override
     {
     }

Source/Engine/GraphicsDevice/Null/GPUDeviceNull.cpp

@@ -144,6 +144,11 @@ void GPUDeviceNull::WaitForGPU()
 {
 }
 
+bool GPUDeviceNull::GetQueryResult(uint64 queryID, uint64& result, bool wait)
+{
+    return false;
+}
+
 GPUTexture* GPUDeviceNull::CreateTexture(const StringView& name)
 {
     PROFILE_MEM(GraphicsTextures);

Source/Engine/GraphicsDevice/Null/GPUDeviceNull.h

@@ -20,18 +20,15 @@ class GPUDeviceNull : public GPUDevice
     friend GPUSwapChainNull;
 
 private:
-
     GPUContextNull* _mainContext;
     GPUAdapterNull* _adapter;
 
 public:
-
     static GPUDevice* Create();
     GPUDeviceNull();
     ~GPUDeviceNull();
 
 public:
-
     // [GPUDevice]
     GPUContext* GetMainContext() override;
     GPUAdapter* GetAdapter() const override;
@@ -41,6 +38,7 @@ public:
     void Draw() override;
     void Dispose() override;
     void WaitForGPU() override;
+    bool GetQueryResult(uint64 queryID, uint64& result, bool wait = false) override;
     GPUTexture* CreateTexture(const StringView& name) override;
     GPUShader* CreateShader(const StringView& name) override;
     GPUPipelineState* CreatePipelineState() override;