Move the screen Clear and Draw methods outside the GameBase lifecycle

Gamebase.cpp

@@ -4,7 +4,8 @@
 namespace gamebase
 {
 	Gamebase::Gamebase(std::unique_ptr<TimerBase> timerImplementation)
-		: timer(std::move(timerImplementation)), _shouldQuit(false)
+		: timer(std::move(timerImplementation)),
+		graphicsDevice(nullptr), _shouldQuit(false)
 	{
 
 	}
@@ -22,13 +23,22 @@ namespace gamebase
 			// Initialization failed
 			return;
 		}
+
+		if(this->graphicsDevice == nullptr)
+		{
+			// Graphics device is not set
+			// TODO: Throw an exception here
+			return;
+		}
 
 		this->Load();
 		while(!shouldQuit())
 		{
 			timer->Start();
 			this->Update();
+			this->graphicsDevice->Clear();
 			this->Draw();
+			this->graphicsDevice->Clear();
 			timer->Stop();
 
 			// Wait until the time for the given frame is elapsed

Gamebase.h

@@ -33,6 +33,7 @@
 
 // Include utilities
 #include "utils/TimerBase.h"
+#include "utils/IGraphicsDevice.h"
 
 #include <memory>
 
@@ -45,6 +46,7 @@ namespace gamebase {
         protected:
             std::unique_ptr<TimerBase> timer;
             bool shouldQuit();
+            std::unique_ptr<IGraphicsDevice> graphicsDevice;
 
         public:
             Gamebase(std::unique_ptr<TimerBase> timerImplementation);
@@ -56,5 +58,9 @@ namespace gamebase {
             void Run(unsigned int fps);
 
             virtual void Quit();
+            void registerGraphicsDevice(std::unique_ptr<IGraphicsDevice> graphicsDevice)
+            {
+                this->graphicsDevice = std::move(graphicsDevice);
+            }
     };
 }

utils/IGraphicsDevice.h

@@ -0,0 +1,11 @@
+#pragma once
+
+namespace gamebase
+{
+    class IGraphicsDevice
+    {
+        public:
+            virtual void Clear() = 0;
+            virtual void Draw() = 0;
+    };
+}