Cleanup. GL bindings

SampleGame/src/SampleGame.bf

@@ -5,7 +5,7 @@ namespace Strawberry.Sample
 	public class SampleGame : Game
 	{
 		public this(PlatformLayer platformLayer)
-			: base(platformLayer, "Strawberry Sample Game!", 320, 180, 3)
+			: base(platformLayer, "Strawberry Sample Game!", 320, 180, 3, 1)
 		{
 			Controls.Init();
 			Scene = new Level();

src/Core/Game.bf

@@ -34,7 +34,7 @@ namespace Strawberry
 		private bool* keyboardState;
 		private int32 updateCounter;
 
-		public this(PlatformLayer platformLayer, String windowTitle, int32 width, int32 height, int32 windowScale, int gamepadLimit = 1)
+		public this(PlatformLayer platformLayer, String windowTitle, int32 width, int32 height, int32 windowScale, int gamepadLimit)
 			: base()
 		{
 			Game = this;
@@ -89,23 +89,25 @@ namespace Strawberry
 		public void Run()
 		{
 			float msCounter = 0;
+			uint32 prevTick = 0;
 			while (true)
 			{
 				if (PlatformLayer.Closed())
 					return;
 
-				msCounter += PlatformLayer.Tick();
+				uint32 tick = PlatformLayer.Tick;
+				msCounter += (tick - prevTick);
+				prevTick = tick;
 
 				if (Time.FixedTimestep)
 				{
 					Time.RawDelta = Time.TargetDeltaTime;
 					while (msCounter >= Time.TargetMilliseconds)
 					{
+						msCounter -= Time.TargetMilliseconds;
 						PlatformLayer.UpdateInput();
 						Update();
 						Input.AfterUpdate();
-
-						msCounter -= Time.TargetMilliseconds;
 					}
 				}
 				else

src/PlatformLayer/PlatformLayer.bf

@@ -4,18 +4,20 @@ namespace Strawberry
 	public abstract class PlatformLayer
 	{
 		public abstract void Init();
-		public abstract uint32 Tick(); 	// Returns milliseconds since last tick
-		public abstract bool Closed();	// If the game window has been closed
+		public abstract bool Closed();			// If the game window has been closed
 
 		//Rendering
 		public abstract void RenderBegin();
 		public abstract void RenderEnd();
 
+		//Update
+		public abstract uint32 Tick { get; } 	// Milliseconds since game launched
+
 		//Input
 		public abstract void UpdateInput();
-		public abstract bool PollKey(Keys key);
 		public abstract bool CapsLock { get; }
 		public abstract bool NumLock { get; }
+		public abstract bool PollKey(Keys key);
 		public abstract bool PollGamepadButton(int gamepadID, Buttons button);
 		public abstract float PollGamepadAxis(int gamepadID, Axes axis);
 	}

src/PlatformLayer/SDL2PlatformLayer.bf

@@ -11,6 +11,7 @@ namespace Strawberry
 		private SDL.Rect screenRect;
 		private SDL.Renderer* renderer;
 		private SDL.SDL_GLContext glContext;
+		private uint glProgram;
 		private SDL.SDL_GameController*[] gamepads;
 		private bool* keyboard;
 
@@ -39,8 +40,8 @@ namespace Strawberry
 
 			//Graphics
 			{
-				window = SDL.CreateWindow(Game.Title, .Centered, .Centered, screenRect.w, screenRect.h, .Shown);
 				screenRect = SDL.Rect(0, 0, (int32)(Game.Width * Game.WindowScale), (int32)(Game.Height * Game.WindowScale));
+				window = SDL.CreateWindow(Game.Title, .Centered, .Centered, screenRect.w, screenRect.h, .Shown | .OpenGL);
 				renderer = SDL.CreateRenderer(window, -1, .Accelerated);
 				screen = SDL.GetWindowSurface(window);
 				SDLImage.Init(.PNG | .JPG);
@@ -48,6 +49,9 @@ namespace Strawberry
 
 				glContext = SDL.GL_CreateContext(window);
 				SDL.GL_SetSwapInterval(1);
+				GL.Init(=> SdlGetProcAddress);
+
+				glProgram = GL.glCreateProgram();
 			}
 
 			//Audio
@@ -64,21 +68,19 @@ namespace Strawberry
 			}
 		}
 
+		static void* SdlGetProcAddress(StringView string)
+		{
+			return SDL.SDL_GL_GetProcAddress(string.ToScopeCStr!());
+		}
+
 		public ~this()
 		{
 			delete gamepads;
-		}
 
-		public override void RenderBegin()
-		{
-			SDL.SetRenderDrawColor(renderer, Game.ClearColor.R, Game.ClearColor.G, Game.ClearColor.B, Game.ClearColor.A);
-			SDL.RenderClear(renderer);
-			SDL.RenderSetScale(renderer, Game.WindowScale, Game.WindowScale);
-		}
-
-		public override void RenderEnd()
-		{
-			SDL.RenderPresent(renderer);
+			GL.glDeleteProgram(glProgram);
+			SDL.GL_DeleteContext(glContext);
+			SDL.DestroyWindow(window);
+			SDL.Quit();
 		}
 
 		public override bool Closed()
@@ -87,6 +89,20 @@ namespace Strawberry
 			return (SDL.PollEvent(out event) != 0 && event.type == .Quit);
 		}
 
+		public override uint32 Tick => SDL.GetTicks();
+
+		public override void RenderBegin()
+		{
+			GL.glClearColor(Game.ClearColor.Rf, Game.ClearColor.Gf, Game.ClearColor.Bf, Game.ClearColor.Af);
+			GL.glClear(GL.GL_COLOR_BUFFER_BIT);
+			GL.glCreateProgram();
+		}
+
+		public override void RenderEnd()
+		{
+			SDL.GL_SwapWindow(window);
+		}
+
 		public override void UpdateInput()
 		{
 			SDL.PumpEvents();
@@ -124,10 +140,5 @@ namespace Strawberry
 			else
 				return val / 32768f;
 		}
-
-		public override uint32 Tick()
-		{
-			return SDL.GetTicks();
-		}
 	}
 }

src/Static/Time.bf

@@ -2,7 +2,7 @@ namespace Strawberry
 {
 	static public class Time
 	{
-		static public bool FixedTimestep = true;
+		static public bool FixedTimestep = false;
 		static public float TargetDeltaTime = 1 / 60f;
 		static public float Elapsed;
 		static public float PreviousElapsed;