Split CPU raster display time from vertical blank time.

Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>

Gaming/inc/Game.h

@@ -47,7 +47,8 @@ namespace Gaming {
 
 		virtual std::string title() const = 0;
 
-		virtual void runFrame() = 0;
+		virtual void runRasterLines() {};
+		virtual void runVerticalBlank() {}
 
 		void addJoystick(SDL_Event& e);
 		void removeJoystick(SDL_Event& e);

Gaming/src/Game.cpp

@@ -103,7 +103,7 @@ void Game::runLoop() {
 			}
 		}
 
-		runFrame();
+		runRasterLines();
 
 		updateTexture();
 		copyTexture();
@@ -119,6 +119,8 @@ void Game::runLoop() {
 				::SDL_Delay(sleepNeeded);
 			}
 		}
+
+		runVerticalBlank();
 	}
 }