add some basic SDL initialization and cleanup

Blarg.GameFramework.SDL2/Blarg.GameFramework.SDL2.csproj

@@ -48,6 +48,7 @@
     <Compile Include="Input\SDLMouse.cs" />
     <Compile Include="IO\SDLFileSystem.cs" />
     <Compile Include="SDLLogger.cs" />
+    <Compile Include="SDLLooper.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>

Blarg.GameFramework.SDL2/SDLLooper.cs

@@ -0,0 +1,119 @@
+using System;
+using SDL2;
+using Blarg.GameFramework.Input;
+using Blarg.GameFramework.IO;
+
+namespace Blarg.GameFramework
+{
+	public class SDLLooper : ILooper
+	{
+		bool _isSDLinited;
+		IntPtr _window;
+		IntPtr _glContext;
+		SDLKeyboard _keyboard;
+		SDLMouse _mouse;
+		SDLFileSystem _filesystem;
+
+		public SDLLooper()
+		{
+		}
+
+		public void Run(IGameApp gameApp)
+		{
+			if (gameApp == null)
+				throw new ArgumentNullException("gameApp");
+
+			Platform.Services.Logger.Info("Looper", "Running...");
+
+			if (!InitSDL())
+			{
+				Platform.Services.Logger.Error("Looper", "SDL initialization failed. Aborting.");
+				return;
+			}
+		}
+
+		private bool InitSDL()
+		{
+			Platform.Services.Logger.Info("Looper", "SDL initialization starting.");
+
+			SDL.SDL_version sdlVersion;
+			SDL.SDL_VERSION(out sdlVersion);
+			Platform.Services.Logger.Info("Looper", "SDL Runtime Version: {0}.{1}.{2}", sdlVersion.major, sdlVersion.minor, sdlVersion.patch);
+			Platform.Services.Logger.Info("Looper", "SDL Linked Version: {0}.{1}.{2}", SDL.SDL_MAJOR_VERSION, SDL.SDL_MINOR_VERSION, SDL.SDL_PATCHLEVEL);
+
+			if (SDL.SDL_Init(SDL.SDL_INIT_VIDEO | SDL.SDL_INIT_AUDIO | SDL.SDL_INIT_GAMECONTROLLER | SDL.SDL_INIT_JOYSTICK | SDL.SDL_INIT_TIMER) == -1)
+			{
+				Platform.Services.Logger.Error("Looper", "SDL_Init() failed: {0}", SDL.SDL_GetError());
+				return false;
+			}
+
+			_keyboard = new SDLKeyboard();
+			Platform.Services.Logger.Info("Looper", "Keyboard input device ready.");
+
+			_mouse = new SDLMouse();
+			Platform.Services.Logger.Info("Looper", "Mouse input device ready.");
+
+			int numJoysticks = SDL.SDL_NumJoysticks();
+
+			Platform.Services.Logger.Info("Looper", "{0} joystick input devices found.", numJoysticks);
+			for (int i = 0; i < numJoysticks; ++i)
+			{
+				Platform.Services.Logger.Info("Looper", "Joystick #{0}. {1}:", (i + 1), SDL.SDL_JoystickNameForIndex(i));
+				IntPtr joystick = SDL.SDL_JoystickOpen(i);
+				if (joystick != IntPtr.Zero)
+				{
+					Platform.Services.Logger.Info("Looper", "\tAxes: {0}", SDL.SDL_JoystickNumAxes(joystick));
+					Platform.Services.Logger.Info("Looper", "\tBalls: {0}", SDL.SDL_JoystickNumBalls(joystick));
+					Platform.Services.Logger.Info("Looper", "\tHats: {0}", SDL.SDL_JoystickNumHats(joystick));
+					Platform.Services.Logger.Info("Looper", "\tButtons: {0}", SDL.SDL_JoystickNumButtons(joystick));
+					SDL.SDL_JoystickClose(joystick);
+				}
+				else
+					Platform.Services.Logger.Warn("Looper", "\tMore information could not be obtained.");
+			}
+
+			_filesystem = new SDLFileSystem();
+			Platform.Services.Logger.Info("Looper", "Filesystem access initialized.");
+
+			Platform.Services.Logger.Info("Looper", "SDL initialization finished.");
+			return true;
+		}
+
+		#region IDisposable
+
+		private void ReleaseSDL()
+		{
+			if (!_isSDLinited)
+				return;
+
+			if (_glContext != IntPtr.Zero)
+			{
+				SDL.SDL_GL_DeleteContext(_glContext);
+				_glContext = IntPtr.Zero;
+			}
+			if (_window != IntPtr.Zero)
+			{
+				SDL.SDL_DestroyWindow(_window);
+				_window = IntPtr.Zero;
+			}
+
+			SDL.SDL_Quit();
+
+			Platform.Services.Logger.Info("Looper", "SDL shutdown.");
+		}
+
+		~SDLLooper()
+		{
+			ReleaseSDL();
+		}
+
+		public void Dispose()
+		{
+			ReleaseSDL();
+			GC.SuppressFinalize(this);
+		}
+
+		#endregion
+	}
+}
+

Blarg.GameFramework/ILooper.cs

@@ -2,7 +2,7 @@ using System;
 
 namespace Blarg.GameFramework
 {
-	public interface ILooper
+	public interface ILooper : IDisposable
 	{
 		void Run(IGameApp gameApp);
 	}