Implementações em Game

framework/platform-dx/game.cpp

@@ -28,7 +28,7 @@ namespace xna {
 	int Game::StartGameLoop() {
 		MSG msg{};		
 
-		impl->_stepTimer = xna::StepTimer();
+		impl->_stepTimer = xna::StepTimer();		
 
 		do {
 			if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
@@ -42,6 +42,7 @@ namespace xna {
 
 		} while (msg.message != WM_QUIT);
 
+		EndRun();
 		return static_cast<int>(msg.wParam);
 	}
 
@@ -58,7 +59,9 @@ namespace xna {
 				Update(_currentGameTime);
 			});
 
+		BeginDraw();
 		Draw(_currentGameTime);
+		EndDraw();
 	}
 
 	int Game::Run() {
@@ -79,6 +82,7 @@ namespace xna {
 			}
 
 			isRunning = true;
+			BeginRun();
 			return StartGameLoop();
 		}
 		catch (std::exception& e) {

inc/xna/game/game.hpp

@@ -53,19 +53,29 @@ namespace xna {
 		void ResizeWindow(int width, int heigth);
 
 	protected:
+		//Starts the drawing of a frame. This method is followed by calls to Draw and EndDraw. 
+		virtual void BeginDraw(){}
+		//Called after all components are initialized but before the first update in the game loop. 
+		virtual void BeginRun() {};
+		//Called when the game determines it is time to draw a frame.
 		virtual void Draw(GameTime const& gameTime);
+		//Ends the drawing of a frame. This method is preceeded by calls to Draw and BeginDraw.
+		virtual void EndDraw() {}
+		//Called after the game loop has stopped running before exiting.
+		virtual void EndRun() {};
+		//Called after the Game and GraphicsDevice are created, but before LoadContent. 
 		virtual void Initialize();
+		//Called when graphics resources need to be loaded.
 		virtual void LoadContent(){}
-		virtual void Update(GameTime const& gameTime);
+		//Called when the game has determined that game logic needs to be processed.
-		int StartGameLoop();		
+		virtual void Update(GameTime const& gameTime);		
-
-	public:
-		sptr<GraphicsDevice> graphicsDevice = nullptr;
-
-	protected:
-		sptr<GameServiceContainer> services = nullptr;
 
 	private:
+		int StartGameLoop();
+
+	private:
+		friend class GraphicsDeviceManager;
+
 		sptr<GameComponentCollection> _gameComponents = nullptr;
 		sptr<GameWindow> _gameWindow{ nullptr };
 		sptr<AudioEngine> _audioEngine = nullptr;
@@ -77,6 +87,8 @@ namespace xna {
 		bool isFixedTimeStep{ true };
 		TimeSpan targetElapsedTime{ TimeSpan::FromTicks(166667L) };
 		bool isRunning{ false };
+		sptr<GameServiceContainer> services = nullptr;
+		sptr<GraphicsDevice> graphicsDevice = nullptr;
 
 	public:
 		struct PlatformImplementation;

samples/01_blank/xna.cpp

@@ -20,14 +20,14 @@ namespace xna {
 			//graphics->Initialize();
 			graphics->ApplyChanges();
 
-			std::any device = graphicsDevice;
+			std::any device = Device();
-			services->AddService(*typeof<GraphicsDevice>(), device);
+			Services()->AddService(*typeof<GraphicsDevice>(), device);
 
 			Game::Initialize();
 		}
 
 		void LoadContent() override {
-			spriteBatch = snew<SpriteBatch>(graphicsDevice);
+			spriteBatch = snew<SpriteBatch>(Device());
 			Game::LoadContent();
 		}
 
@@ -39,7 +39,7 @@ namespace xna {
 		}
 
 		void Draw(GameTime const& gameTime) override {
-			graphicsDevice->Clear(Colors::CornflowerBlue);
+			Device()->Clear(Colors::CornflowerBlue);
 			Game::Draw(gameTime);
 		}
 

samples/02_PlatfformerStarterKit/game.cpp

@@ -24,14 +24,14 @@ namespace PlatformerStarterKit {
 			graphics = snew<GraphicsDeviceManager>(game->shared_from_this());			
 			graphics->ApplyChanges();
 
-			std::any device = graphicsDevice;
+			std::any device = Device();
-			services->AddService(*typeof<GraphicsDevice>(), device);
+			Services()->AddService(*typeof<GraphicsDevice>(), device);
 
 			Game::Initialize();
 		}
 
 		void LoadContent() override {
-			spriteBatch = snew<SpriteBatch>(graphicsDevice);					
+			spriteBatch = snew<SpriteBatch>(Device());					
 
 			// Load fonts
 			hudFont = Content()->Load<PSpriteFont>("Fonts/Hud");
@@ -55,7 +55,7 @@ namespace PlatformerStarterKit {
 		}
 
 		void Draw(GameTime const& gameTime) override {
-			graphicsDevice->Clear(Colors::CornflowerBlue);
+			Device()->Clear(Colors::CornflowerBlue);
 
 			spriteBatch->Begin();
 
@@ -111,7 +111,7 @@ namespace PlatformerStarterKit {
 				levelIndex = -1;
 			}			
 			
-			level = snew<Level>(services, levelPath);
+			level = snew<Level>(Services(), levelPath);
 			level->Initialize();
 		}
 
@@ -122,7 +122,7 @@ namespace PlatformerStarterKit {
 
 		void DrawHud()
 		{
-			auto titleSafeArea = graphicsDevice->Viewport().Bounds();
+			auto titleSafeArea = Device()->Viewport().Bounds();
 			auto hudLocation = Vector2(titleSafeArea.X, titleSafeArea.Y);
 			auto center = Vector2(titleSafeArea.X + titleSafeArea.Width / 2.0f,
 				titleSafeArea.Y + titleSafeArea.Height / 2.0f);

samples/CMakeLists.txt

@@ -4,4 +4,4 @@
 
 # Add source to this project's executable.
 add_subdirectory ("01_blank")
-#add_subdirectory ("02_PlatfformerStarterKit")
+add_subdirectory ("02_PlatfformerStarterKit")