Separate GraphicsContext from Window, prepare for windows and swap chain for multi window

GlitchyEditor/src/EditorLayer.bf

@@ -118,7 +118,7 @@ namespace GlitchyEditor
 		[AllowAppend]
 		public this(String[] args, EditorContentManager contentManager) : base("Editor")
 		{
-			Application.Get().Window.IsVSync = true;
+			Application.Get().MainWindow.IsVSync = true;
 
 			ScriptEngine.ApplicationInfo.IsEditor = true;
 
@@ -306,7 +306,7 @@ namespace GlitchyEditor
 
 		private void InitGraphics()
 		{
-			_context = Application.Get().Window.Context..AddRef();
+			_context = Application.Instance.ImmediateContext..AddRef();
 			
 			RasterizerStateDescription rsDesc = .(.Solid, .Back, true);
 			_rasterizerState = new RasterizerState(rsDesc);
@@ -471,7 +471,7 @@ namespace GlitchyEditor
 			RenderCommand.SetRenderTarget(null, 0, true);
 			RenderCommand.BindRenderTargets();
 
-			RenderCommand.SetViewport(_context.SwapChain.BackbufferViewport);
+			RenderCommand.SetViewport(Application.Instance.MainWindow.SwapChain.BackbufferViewport);
 		}
 
 		private void DebugDraw3D()
@@ -583,7 +583,7 @@ namespace GlitchyEditor
 				title.AppendF($" | {_editorScene.Name}");
 			}
 
-			Application.Instance.Window.Title = title;
+			Application.Instance.MainWindow.Title = title;
 		}
 
 #region Project Management

GlitchyEngine/src/Application.bf

@@ -14,7 +14,7 @@ namespace GlitchyEngine
 	{
 		static Application s_Instance = null;
 
-		private Window _window;
+		private Window _mainWindow;
 		private RendererAPI _rendererApi;
 
 		private bool _running = true;
@@ -26,6 +26,10 @@ namespace GlitchyEngine
 		private ImGuiLayer _imGuiLayer;
 #endif
 		
+		private GraphicsContext _immediateGraphicsContext ~ _?.ReleaseRef();
+
+		public GraphicsContext ImmediateContext => _immediateGraphicsContext;
+
 		private GameTime _gameTime;
 		
 		private IContentManager _contentManager;
@@ -34,7 +38,7 @@ namespace GlitchyEngine
 		private append Monitor _jobQueueMutex = .();
 
 		public bool IsRunning => _running;
-		public Window Window => _window;
+		public Window MainWindow => _mainWindow;
 
 		public IContentManager ContentManager => _contentManager;
 
@@ -62,8 +66,16 @@ namespace GlitchyEngine
 			WindowDescription windowDesc = .Default;
 			windowDesc.Icon = "Resources/Textures/GlitchyEngineIcon.ico";
 			
-			_window = new Window(windowDesc);
-			_window.EventCallback = new => OnEvent;
+			if (GraphicsContext.Get() == null)
+			{
+				_immediateGraphicsContext = new GraphicsContext(null, true);
+				_immediateGraphicsContext.Init();
+			}
+
+			_mainWindow = new Window(windowDesc);
+			_mainWindow.EventCallback = new => OnEvent;
+
+			_immediateGraphicsContext.CurrentWindow = _mainWindow;
 
 			Input.Init();
 			
@@ -71,7 +83,7 @@ namespace GlitchyEngine
 
 			// TODO: RenderAPI in RenderCommand initialisieren?
 			_rendererApi = new RendererAPI();
-			_rendererApi.Context = _window.Context;
+			_rendererApi.Context = _immediateGraphicsContext;
 
 			SamplerStateManager.Init();
 
@@ -110,7 +122,7 @@ namespace GlitchyEngine
 			delete _layerStack;
 
 			delete _rendererApi;
-			delete _window;
+			delete _mainWindow;
 			
 			delete _gameTime;
 
@@ -178,7 +190,7 @@ namespace GlitchyEngine
 						layer.Update(_gameTime);
 				}
 				
-				_window.Update();
+				_mainWindow.Update();
 				
 				if(allowFrame)
 				{
@@ -186,7 +198,7 @@ namespace GlitchyEngine
 					_imGuiLayer.ImGuiRender();
 #endif
 	
-					_window.Context.SwapChain.Present();
+					_mainWindow.SwapChain.Present();
 				}
 			}
 		}

GlitchyEngine/src/ImGui/ImGuiLayer.bf

@@ -54,7 +54,7 @@ namespace GlitchyEngine.ImGui
 			}
 
 #if BF_PLATFORM_WINDOWS
-			ImGuiImplWin32.Init(Application.Get().Window.NativeWindow);
+			ImGuiImplWin32.Init(Application.Instance.MainWindow.NativeWindow);
 #endif
 
 #if GE_GRAPHICS_DX11

GlitchyEngine/src/OrthographicCameraController.bf

@@ -39,7 +39,8 @@ namespace GlitchyEngine
 		{
 			Debug.Profiler.ProfileFunction!();
 			
-			if(Application.Get().Window.IsActive)
+			// TODO: Don't check the main window instead check the editor view window
+			if(Application.Instance.MainWindow.IsActive)
 			{
 				float3 movement = .();
 

GlitchyEngine/src/PerspectiveCameraController.bf

@@ -98,7 +98,8 @@ namespace GlitchyEngine
 		{
 			Debug.Profiler.ProfileFunction!();
 
-			if(Application.Get().Window.IsActive)
+			// TODO: Don't check the main window instead check the editor view window
+			if(Application.Instance.MainWindow.IsActive)
 			{
 				float3 movement = .();
 

GlitchyEngine/src/Platform/DX11/Renderer/Dx11GraphicsContext.bf

@@ -19,10 +19,6 @@ namespace GlitchyEngine.Renderer
 	/// DirectX 11 specific implementation of the GraphicsContext
 	extension GraphicsContext
 	{
-		private SwapChain _swapChain;
-
-		internal Windows.HWnd nativeWindowHandle;
-
 		/// Gets whether or not the DX11 device is initialized.
 		//internal bool IsDx11Initialized => nativeDevice != null;
 		//internal ID3D11Device* nativeDevice => NativeDevice;
@@ -30,7 +26,7 @@ namespace GlitchyEngine.Renderer
 
 		//internal ID3D11Debug* debugDevice => DebugDevice;
 
-		public override SwapChain SwapChain => _swapChain;
+		//public override SwapChain SwapChain => _mainWindow.SwapChain;
 
 		private const uint32 MaxRTVCount = DirectX.D3D11.D3D11_SIMULTANEOUS_RENDER_TARGET_COUNT;
 
@@ -41,23 +37,10 @@ namespace GlitchyEngine.Renderer
 
 		//public static override uint32 MaxRenderTargetCount() => MaxRTVCount;
 
-		public this(Windows.HWnd windowHandle)
-		{
-			Debug.Profiler.ProfileFunction!();
-
-			nativeWindowHandle = windowHandle;
-
-			_swapChain = new SwapChain(this);
-
-			s_GraphicsContext = this;
-		}
-
 		public ~this()
 		{
 			Debug.Profiler.ProfileFunction!();
 
-			delete _swapChain;
-
 			Dx11Release();
 		}
 
@@ -65,57 +48,12 @@ namespace GlitchyEngine.Renderer
 		{
 			Debug.Profiler.ProfileFunction!();
 
+			if (_immediateContext)
+			{
+				s_GraphicsContext = this;
 				Dx11Init();
-
-			SwapChain.Init();
-		}
-
-		/**
-		 * Initializes the Device and ImmediateContext.
-		 */
-		/*
-		void InitDevice()
-		{
-			if(!IsDx11Initialized)
-			{
-				Log.EngineLogger.Trace("Creating D3D11 Device and Context...");
-				
-				DeviceCreationFlags deviceFlags = .None;
-#if DEBUG
-				deviceFlags |= .Debug;
-#endif
-
-				FeatureLevel[] levels = scope .(.Level_11_0);
-
-				FeatureLevel deviceLevel = ?;
-				var deviceResult = D3D11.CreateDevice(null, .Hardware, 0, deviceFlags, levels, &nativeDevice, &deviceLevel, &nativeContext);
-				Log.EngineLogger.Assert(deviceResult.Succeeded, scope $"Failed to create D3D11 Device. Message({(int32)deviceResult}): {deviceResult}");
-
-#if DEBUG	
-				if(nativeDevice.QueryInterface<ID3D11Debug>(out debugDevice).Succeeded)
-				{
-					ID3D11InfoQueue* infoQueue;
-					if(nativeDevice.QueryInterface<ID3D11InfoQueue>(out infoQueue).Succeeded)
-					{
-						infoQueue.SetBreakOnSeverity(.Corruption, true);
-						infoQueue.SetBreakOnSeverity(.Error, true);
-
-						infoQueue.Release();
 			}
 		}
-#endif
-
-				Log.EngineLogger.Trace($"D3D11 Device and Context created (Feature level: {deviceLevel})");
-			}
-			else
-			{
-				// We created a second GraphicsContext (for some reason?) just increment references.
-				nativeDevice.AddRef();
-				nativeContext.AddRef();
-				debugDevice.AddRef();
-			}
-		}
-		*/
 
 		private ID3D11DepthStencilView* _depthStencilTarget;
 		private ID3D11RenderTargetView*[MaxRTVCount] _renderTargets;
@@ -132,11 +70,11 @@ namespace GlitchyEngine.Renderer
 
 		public override void SetRenderTarget(RenderTarget2D renderTarget, int slot, bool setDepthTarget)
 		{
-			_renderTargets[slot] = (renderTarget ?? _swapChain.BackBuffer)._nativeRenderTargetView;
+			_renderTargets[slot] = (renderTarget ?? _currentWindow.SwapChain.BackBuffer)._nativeRenderTargetView;
 
 			if(slot == 0 && setDepthTarget)
 			{
-				SetDepthStencilTarget((renderTarget ?? _swapChain.BackBuffer).DepthStencilTarget);
+				SetDepthStencilTarget((renderTarget ?? _currentWindow.SwapChain.BackBuffer).DepthStencilTarget);
 			}
 		}
 
@@ -168,7 +106,7 @@ namespace GlitchyEngine.Renderer
 		{
 			using (ContextMonitor.Enter())
 			{
-				NativeContext.ClearRenderTargetView((renderTarget ?? _swapChain.BackBuffer)._nativeRenderTargetView, color);
+				NativeContext.ClearRenderTargetView((renderTarget ?? _currentWindow.SwapChain.BackBuffer)._nativeRenderTargetView, color);
 			}
 		}
 

GlitchyEngine/src/Platform/DX11/Renderer/Dx11RenderTarget.bf

@@ -47,14 +47,12 @@ namespace GlitchyEngine.Renderer
 
 			ReleaseAndNullify();
 
-			if(_description.IsSwapchainTarget)
+			if(_description.SwapChain != null)
 			{
 				// TODO: if the engine supports multiple windows it has to support multiple swap chains.
 
-				// kinda dirty...
-				var context = GraphicsContext.Get();
-
-				context.SwapChain.GetBackbuffer(out _nativeTexture);
+				// Still dirty, we need to be able to pass in which swap chain to use!
+				_description.SwapChain.GetBackbuffer(out _nativeTexture);
 
 				CreateViews();
 			}
@@ -100,7 +98,8 @@ namespace GlitchyEngine.Renderer
 		{
 			Debug.Profiler.ProfileResourceFunction!();
 
-			if(_description.IsSwapchainTarget)
+			// TODO: Why did we branch here?
+			/*if(_description.Swapchain != null)
 			{
 				var result = NativeDevice.CreateShaderResourceView(_nativeTexture, null, &_nativeResourceView);
 				Log.EngineLogger.Assert(result.Succeeded, "Failed to create resource view");
@@ -111,7 +110,7 @@ namespace GlitchyEngine.Renderer
 				result = NativeDevice.CreateRenderTargetView(_nativeTexture, null, &_nativeRenderTargetView);
 				Log.EngineLogger.Assert(result.Succeeded, "Failed to create render target view");
 			}
-			else
+			else*/
 			{
 				var result = NativeDevice.CreateShaderResourceView(_nativeTexture, null, &_nativeResourceView);
 				Log.EngineLogger.Assert(result.Succeeded, "Failed to create resource view");
@@ -373,10 +372,8 @@ namespace GlitchyEngine.Renderer
 					{
 						// TODO: if the engine supports multiple windows it has to support multiple swap chains.
 
-						// kinda dirty...
-						var context = GraphicsContext.Get();
-		
-						context.SwapChain.GetBackbuffer(out _nativeTextures[i]);
+						// Still dirty, we need to be able to pass in which swap chain to use!
+						Application.Instance.MainWindow.SwapChain.GetBackbuffer(out _nativeTextures[i]);
 					}
 					else
 					{

GlitchyEngine/src/Platform/DX11/Renderer/Dx11RendererAPI.bf

@@ -39,7 +39,7 @@ namespace GlitchyEngine.Renderer
 
 		private mixin RtOrBackbuffer(RenderTarget2D renderTarget)
 		{
-			renderTarget ?? _context.SwapChain.BackBuffer
+			renderTarget ?? _context.CurrentWindow.SwapChain.BackBuffer
 		}
 
 		public override void Clear(RenderTarget2D renderTarget, ColorRGBA color)

GlitchyEngine/src/Platform/DX11/Renderer/Dx11SwapChain.bf

@@ -10,6 +10,8 @@ using internal GlitchyEngine.Platform.DX11;
 
 namespace GlitchyEngine.Renderer
 {
+	using internal GlitchyEngine;
+
 	public extension SwapChain
 	{
 		internal DirectX.DXGI.IDXGIDevice* nativeDxgiDevice;
@@ -34,7 +36,7 @@ namespace GlitchyEngine.Renderer
 
 		void SetResolutionFromWindow()
 		{
-			DirectX.Windows.Winuser.GetClientRect(_context.nativeWindowHandle, let rect);
+			DirectX.Windows.Winuser.GetClientRect(_window._windowHandle, let rect);
 
 			Width = (.)(rect.Right - rect.Left);
 			Height = (.)(rect.Bottom - rect.Top);
@@ -68,7 +70,7 @@ namespace GlitchyEngine.Renderer
 
 			uint32 backBufferCount = 2;
 			Format backBufferFormat = .R8G8B8A8_UNorm;
-			Format backBufferViewFormat = .R8G8B8A8_UNorm; // _SRGB
+			// TODO: Allow this: Format backBufferViewFormat = .R8G8B8A8_UNorm_SRGB;
 
 			if(nativeSwapChain != null)
 			{
@@ -101,7 +103,7 @@ namespace GlitchyEngine.Renderer
 				SwapChainFullscreenDescription fsSwapChainDesc = .();
 				fsSwapChainDesc.Windowed = true;
 
-				var createResult = factory.CreateSwapChainForHwnd((.)NativeDevice, _context.nativeWindowHandle, ref swDesc, &fsSwapChainDesc, null, &nativeSwapChain);
+				var createResult = factory.CreateSwapChainForHwnd((.)NativeDevice, _window._windowHandle, ref swDesc, &fsSwapChainDesc, null, &nativeSwapChain);
 				if(createResult.Failed)
 				{
 					Log.EngineLogger.Error($"Failed to create swap chain. Message({(int)createResult}):{createResult}");
@@ -112,7 +114,7 @@ namespace GlitchyEngine.Renderer
 
 			RenderTarget2DDescription desc = .(backBufferFormat, _width, _height);
 			desc.DepthStencilFormat = _depthStencilFormat;
-			desc.IsSwapchainTarget = true;
+			desc.SwapChain = this;
 
 			// Todo: perhaps just update the render target
 			_backBuffer = new RenderTarget2D(desc);
@@ -132,7 +134,7 @@ namespace GlitchyEngine.Renderer
 		{
 			Debug.Profiler.ProfileFunction!();
 
-			nativeSwapChain.Present(Application.Get().Window.IsVSync ? 1 : 0, .None);
+			nativeSwapChain.Present(_window.IsVSync ? 1 : 0, .None);
 		}
 	}
 }

GlitchyEngine/src/Platform/Windows/WindowsInput.bf

@@ -194,7 +194,7 @@ namespace GlitchyEngine
 
 		public override static void SetMousePosition(int2 pos)
 		{
-			HWnd windowHandle = (HWnd)(int)Application.Get().Window.NativeWindow;
+			HWnd windowHandle = (HWnd)(int)Application.Get().MainWindow.NativeWindow;
 
 			var pos;
 
@@ -213,7 +213,7 @@ namespace GlitchyEngine
 
 		public override static void Impl_NewFrame()
 		{
-			Window window = Application.Get().Window;
+			Window window = Application.Get().MainWindow;
 
 			Debug.Profiler.ProfileFunction!();
 
@@ -260,7 +260,7 @@ namespace GlitchyEngine
 
 		public override static void Impl_EndFrame()
 		{
-			Application.Get().Window.[Friend]_rawMouseMovementAccumulator = .Zero;
+			Application.Get().MainWindow.[Friend]_rawMouseMovementAccumulator = .Zero;
 		}
 	}
 }

GlitchyEngine/src/Platform/Windows/WindowsWindow.bf

@@ -23,7 +23,7 @@ namespace GlitchyEngine
 		const String WindowClassName = "GlitchyEngineWindow";
 
 		private Windows.HInstance _instanceHandle;
-		private Windows.HWnd _windowHandle;
+		internal Windows.HWnd _windowHandle;
 
 		private WindowClassExW _windowClass;
 
@@ -37,10 +37,6 @@ namespace GlitchyEngine
 
 		private bool _isActive;
 
-		private GraphicsContext _graphicsContext ~ _?.ReleaseRef();
-
-		public override GraphicsContext Context => _graphicsContext;
-
 		public override int32 MinWidth
 		{
 			get => _minMaxInfo.MinimumTrackingSize.x;
@@ -231,8 +227,8 @@ namespace GlitchyEngine
 					CW_USEDEFAULT, CW_USEDEFAULT, desc.Width, desc.Height, 0, 0, (.)_instanceHandle, null);
 			}
 
-			_graphicsContext = new GraphicsContext(_windowHandle);
-			_graphicsContext.Init();
+			_swapChain = new SwapChain(this);
+			_swapChain.Init();
 
 			void* myPtr = Internal.UnsafeCastToPtr(this);
 			SetWindowLongPtrW(_windowHandle, GWL_USERDATA, (int)myPtr);
@@ -300,10 +296,10 @@ namespace GlitchyEngine
 
 					if(window._clientRect.Width != 0 && window._clientRect.Height != 0)
 					{
-						window._graphicsContext.SwapChain.Width = (.)window._clientRect.Width;
-						window._graphicsContext.SwapChain.Height = (.)window._clientRect.Height;
+						window._swapChain.Width = (.)window._clientRect.Width;
+						window._swapChain.Height = (.)window._clientRect.Height;
 	
-						window._graphicsContext.SwapChain.ApplyChanges();
+						window._swapChain.ApplyChanges();
 					}
 
 					WindowResizeEvent event = scope WindowResizeEvent(window._clientRect.Width, window._clientRect.Height, window._isResizingOrMoving);

GlitchyEngine/src/Renderer/GraphicsContext.bf

@@ -9,10 +9,24 @@ namespace GlitchyEngine.Renderer
 		private static GraphicsContext s_GraphicsContext;
 		public static GraphicsContext Get() => s_GraphicsContext;
 		
-		public extern SwapChain SwapChain {get;}
+		private Window _currentWindow;
+
+		private bool _immediateContext;
+
+		public Window CurrentWindow
+		{
+			get => _currentWindow;
+			set => _currentWindow = value;
+		}
 
 		protected extern void PlatformConstruct();
 
+		public this(Window currentWindow, bool immediateContext = false)
+		{
+			_currentWindow = currentWindow;
+			_immediateContext = immediateContext;
+		}
+
 		/**
 		 * The maximum number of simultaneous rendertargets supported. 
 		 */

GlitchyEngine/src/Renderer/RenderTarget.bf

@@ -17,10 +17,11 @@ namespace GlitchyEngine.Renderer
 		public uint32 SampleCount;
 		public uint32 SampleQuality;
 		public DepthStencilFormat DepthStencilFormat;
-		public bool IsSwapchainTarget;
+		/// If not null, the render target will represent the specified swap chains back buffer.
+		public SwapChain SwapChain;
 
 		public this(Format pixelFormat, uint32 width, uint32 height, uint32 arraySize = 1, uint32 mipLevels = 1,
-			DepthStencilFormat depthStencilFormat = .Unknown, CPUAccessFlags cpuAccess = .None, uint32 sampleCount = 1, uint32 sampleQuality = 0, bool isSwapchainTarget = false)
+			DepthStencilFormat depthStencilFormat = .Unknown, CPUAccessFlags cpuAccess = .None, uint32 sampleCount = 1, uint32 sampleQuality = 0, SwapChain swapChain = null)
 		{
 			PixelFormat = pixelFormat;
 			Width = width;
@@ -33,7 +34,7 @@ namespace GlitchyEngine.Renderer
 			SampleCount = sampleCount;
 			SampleQuality = sampleQuality;
 
-			IsSwapchainTarget = isSwapchainTarget;
+			SwapChain = swapChain;
 		}
 	}
 

GlitchyEngine/src/Renderer/RendererAPI.bf

@@ -28,7 +28,7 @@ namespace GlitchyEngine.Renderer
 		{
 			Debug.Profiler.ProfileRendererFunction!();
 
-			var actualRt = (renderTarget ?? GraphicsContext.Get().SwapChain.BackBuffer);
+			var actualRt = (renderTarget ?? GraphicsContext.Get().CurrentWindow.SwapChain.BackBuffer);
 
 			if(options.HasFlag(.Color))
 				Clear(actualRt, color);

GlitchyEngine/src/Renderer/SwapChain.bf

@@ -3,8 +3,9 @@ namespace GlitchyEngine.Renderer
 	public class SwapChain
 	{
 		private GraphicsContext _context;
+		private Window _window;
 
-		private bool _changed;
+		private bool _changed = true;
 
 		private uint32 _width, _height;
 
@@ -16,6 +17,8 @@ namespace GlitchyEngine.Renderer
 
 		public GraphicsContext Context => _context;
 
+		public Window Window => _window;
+
 		/**
 		 * Gets or Sets the backbuffers width.
 		 * @remarks @ApplyChanges() needs to be called in order to apply the changes.
@@ -77,6 +80,11 @@ namespace GlitchyEngine.Renderer
 
 		public RenderTarget2D BackBuffer => _backBuffer;
 
+		public this(Window window)
+		{
+			_window = window;
+		}
+
 		public extern void Init();
 
 		/**

GlitchyEngine/src/Window.bf

@@ -27,10 +27,14 @@ namespace GlitchyEngine
 
 	public class Window
 	{
+		private SwapChain _swapChain ~ delete _;
+
 		public delegate void EventCallback(Event e);
 
 		protected EventCallback _eventCallback ~ delete _;
 
+		public SwapChain SwapChain => _swapChain;
+
 		public extern this(WindowDescription windowDescription);
 
 		/**
@@ -88,11 +92,6 @@ namespace GlitchyEngine
 		 */
 		public extern bool IsVSync {get; set;}
 
-		/**
-		 * Gets the windows graphics context.
-		 */
-		public extern GraphicsContext Context {get;}
-
 		/**
 		 * Gets a pointer to the platform specific window representation.
 		 */