Integrate XCUI shell state and runtime frame seams

engine/include/XCEngine/UI/Runtime/UISceneRuntimeContext.h

@@ -19,6 +19,7 @@ public:
     const UIScreenStackController& GetStackController() const;
 
     const UISystemFrameResult& GetLastFrame() const;
+    UISystemFrameResult ConsumeLastFrame();
 
     void Reset();
     void SetViewportRect(const UIRect& viewportRect);

engine/include/XCEngine/UI/Runtime/UIScreenPlayer.h

@@ -20,6 +20,7 @@ public:
     const UIScreenAsset* GetAsset() const;
     const UIScreenDocument* GetDocument() const;
     const UIScreenFrameResult& GetLastFrame() const;
+    UIScreenFrameResult ConsumeLastFrame();
     const std::string& GetLastError() const;
     std::uint64_t GetPresentedFrameCount() const;
 

engine/include/XCEngine/UI/Runtime/UIScreenTypes.h

@@ -89,9 +89,13 @@ struct UISystemPresentedLayer {
 struct UISystemFrameResult {
     UIDrawData drawData = {};
     std::vector<UISystemPresentedLayer> layers = {};
+    UIRect viewportRect = {};
     std::size_t presentedLayerCount = 0;
     std::size_t skippedLayerCount = 0;
+    std::size_t submittedInputEventCount = 0;
     std::uint64_t frameIndex = 0;
+    double deltaTimeSeconds = 0.0;
+    bool focused = false;
     std::string errorMessage = {};
 };
 

engine/include/XCEngine/UI/Runtime/UISystem.h

@@ -31,6 +31,7 @@ public:
     const UISystemFrameResult& Update(const UIScreenFrameInput& input);
     void Tick(const UIScreenFrameInput& input);
     const UISystemFrameResult& GetLastFrame() const;
+    UISystemFrameResult ConsumeLastFrame();
 
     const std::vector<std::unique_ptr<UIScreenPlayer>>& GetPlayers() const;