Added Backbuffer to Swapchain + RenderCommand API changes

GlitchyEditor/src/EditorLayer.bf

@@ -100,15 +100,14 @@ namespace GlitchyEditor
 
 			TransformSystem.Update(_world);
 
-			RenderCommand.Clear(_renderTarget2D, .(0.2f, 0.2f, 0.2f));
-			RenderCommand.Clear(_renderTarget2D, 1.0f, 0, .Depth);
+			RenderCommand.Clear(_renderTarget2D, .Color | .Depth, .(0.2f, 0.2f, 0.2f), 1.0f, 0);
 
 			_context.SetRenderTarget(_renderTarget2D);
 			_context.BindRenderTargets();
 
 			RenderCommand.SetViewport(Viewport(0, 0, _renderTarget2D.Width, _renderTarget2D.Height));
 
-			_opaqueBlendState.Bind();
+			RenderCommand.SetBlendState(_opaqueBlendState);
 
 			Renderer.BeginScene(_cameraController.Camera);
 
@@ -117,7 +116,7 @@ namespace GlitchyEditor
 			Renderer.EndScene();
 
 			RenderCommand.Clear(null, .(0.2f, 0.2f, 0.2f));
-			RenderCommand.Clear(_swapchainDepthBuffer, 1.0f, 0, .Depth);
+			RenderCommand.Clear(_swapchainDepthBuffer, .Depth, 1.0f, 0);
 
 			_context.SetRenderTarget(null);
 			_context.SetDepthStencilTarget(_swapchainDepthBuffer);

GlitchyEngine/src/Platform/DX11/Renderer/Dx11BlendState.bf

@@ -15,11 +15,6 @@ namespace GlitchyEngine.Renderer
 	{
 		internal ID3D11BlendState* nativeBlendState ~ _?.Release();
 
-		public override void Bind(ColorRGBA blendFactor)
-		{
-			NativeContext.OutputMerger.SetBlendState(nativeBlendState, blendFactor);
-		}
-
 		protected override void PlatformCreateBlendState()
 		{
 			BlendDescription nativeDesc = .Default;

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

@@ -41,6 +41,8 @@ namespace GlitchyEngine.Renderer
 			nativeWindowHandle = windowHandle;
 
 			_swapChain = new SwapChain(this);
+
+			s_GraphicsContext = this;
 		}
 
 		public ~this()
@@ -112,20 +114,13 @@ namespace GlitchyEngine.Renderer
 			_depthStencilTarget = target?.nativeView;
 		}
 
-		public override void SetRenderTarget(RenderTarget2D renderTarget, int slot = 0)
+		public override void SetRenderTarget(RenderTarget2D renderTarget, int slot, bool setDepthTarget)
 		{
-			if(renderTarget == null || renderTarget.Description.IsSwapchainTarget)
-			{
-				_renderTargets[slot] = _swapChain.nativeBackBufferTarget;
-			}
-			else
-			{
-				_renderTargets[slot] = renderTarget._nativeRenderTargetView;
-			}
+			_renderTargets[slot] = (renderTarget ?? _swapChain.BackBuffer)._nativeRenderTargetView;
 
-			if(slot == 0)
+			if(slot == 0 && setDepthTarget)
 			{
-				SetDepthStencilTarget(renderTarget?.DepthStencilTarget);
+				SetDepthStencilTarget((renderTarget ?? _swapChain.BackBuffer).DepthStencilTarget);
 			}
 		}
 
@@ -136,14 +131,7 @@ namespace GlitchyEngine.Renderer
 
 		public override void ClearRenderTarget(RenderTarget2D renderTarget, ColorRGBA color)
 		{
-			if(renderTarget == null)
-			{
-				NativeContext.ClearRenderTargetView(_swapChain.nativeBackBufferTarget, color);
-			}
-			else
-			{
-				NativeContext.ClearRenderTargetView(renderTarget._nativeRenderTargetView, color);
-			}
+			NativeContext.ClearRenderTargetView((renderTarget ?? _swapChain.BackBuffer)._nativeRenderTargetView, color);
 		}
 
 		public override void SetVertexBuffer(uint32 slot, Buffer buffer, uint32 stride, uint32 offset = 0)
@@ -168,11 +156,6 @@ namespace GlitchyEngine.Renderer
 			NativeContext.InputAssembler.SetIndexBuffer(buffer.nativeBuffer, indexFormat == .Index32Bit ? .R32_UInt : .R16_UInt, byteOffset);
 		}
 
-		protected override void SetRasterizerStateImpl()
-		{
-			NativeContext.Rasterizer.SetState(_currentRasterizerState.nativeRasterizerState);
-		}
-
 		public override void SetViewports(uint32 viewportsCount, GlitchyEngine.Renderer.Viewport* viewports)
 		{
 			NativeContext.Rasterizer.SetViewports(viewportsCount, (.)viewports);

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

@@ -3,6 +3,7 @@
 using DirectX.Common;
 using DirectX.D3D11;
 using GlitchyEngine.Platform.DX11;
+using DirectX.DXGI.DXGI1_2;
 
 using internal GlitchyEngine.Platform.DX11;
 
@@ -41,6 +42,18 @@ namespace GlitchyEngine.Renderer
 
 			PlatformCreateTexture();
 
+			if(_description.IsSwapchainTarget)
+			{
+				// 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);
+
+				CreateViews();
+			}
+
 			if(_description.DepthStencilFormat != .None)
 			{
 				_depthStenilTarget = new DepthStencilTarget(_description.Width, _description.Height, _description.DepthStencilFormat);

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

@@ -27,21 +27,67 @@ namespace GlitchyEngine.Renderer
 
 		}
 
-		public override void Clear(RenderTarget2D renderTarget, ColorRGBA clearColor)
+		private mixin RtOrBackbuffer(RenderTarget2D renderTarget)
 		{
-			_context.ClearRenderTarget(renderTarget, clearColor);
+			renderTarget ?? _context.SwapChain.BackBuffer
 		}
 
-		public override void Clear(DepthStencilTarget target, float depthValue, uint8 stencilValue, DepthStencilClearFlag clearFlags)
+		public override void Clear(RenderTarget2D renderTarget, ColorRGBA color)
 		{
-			NativeContext.ClearDepthStencilView(target.nativeView, (.)clearFlags, depthValue, stencilValue);
+			NativeContext.ClearRenderTargetView(RtOrBackbuffer!(renderTarget)._nativeRenderTargetView, color);
 		}
 
-		public override void Clear(RenderTarget2D renderTarget, float depthValue, uint8 stencilValue, DepthStencilClearFlag clearFlags)
+		public override void Clear(DepthStencilTarget target, ClearOptions clearOptions, float depth, uint8 stencil)
 		{
-			NativeContext.ClearDepthStencilView(renderTarget._depthStenilTarget.nativeView, (.)clearFlags, depthValue, stencilValue);
+			if(target == null)
+				return;
+
+			DirectX.D3D11.ClearFlag flags = default;
+			
+			if(clearOptions.HasFlag(.Depth))
+			{
+				flags |= .Depth;
+			}
+			
+			if(clearOptions.HasFlag(.Stencil))
+			{
+				flags |= .Stencil;
+			}
+
+			NativeContext.ClearDepthStencilView(target.nativeView, flags, depth, stencil);
+		}
+
+		public override void SetRenderTarget(RenderTarget2D renderTarget, int slot, bool setDepthBuffer)
+		{
+			_context.SetRenderTarget(renderTarget, slot, setDepthBuffer);
 		}
 		
+		public override void SetDepthStencilTarget(DepthStencilTarget target)
+		{
+			_context.SetDepthStencilTarget(target);
+		}
+
+		public override void BindRenderTargets()
+		{
+			_context.BindRenderTargets();
+		}
+
+		private RasterizerState _currentRasterizerState ~ _?.ReleaseRef();
+
+		public override void SetRasterizerState(RasterizerState rasterizerState)
+		{
+			SetReference!(_currentRasterizerState, rasterizerState);
+			NativeContext.Rasterizer.SetState(_currentRasterizerState.nativeRasterizerState);
+		}
+
+		private BlendState _currentBlendState ~ _?.ReleaseRef();
+
+		public override void SetBlendState(BlendState blendState, ColorRGBA blendFactor)
+		{
+			SetReference!(_currentBlendState, blendState);
+			NativeContext.OutputMerger.SetBlendState(_currentBlendState.nativeBlendState, blendFactor);
+		}
+
 		public override void DrawIndexed(GeometryBinding geometry)
 		{
 			if(geometry.IsIndexed)

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

@@ -12,47 +12,9 @@ namespace GlitchyEngine.Renderer
 {
 	public extension SwapChain
 	{
-		private GraphicsContext _context;
-
-		private bool _changed;
-
-		private uint32 _width, _height;
-		
 		internal DirectX.DXGI.IDXGIDevice* nativeDxgiDevice;
 		internal IDXGISwapChain1* nativeSwapChain;
 
-		internal ID3D11RenderTargetView* nativeBackBufferTarget;
-
-		public override uint32 Width
-		{
-			get => _width;
-
-			set
-			{
-				if(_width == value)
-					return;
-
-				_width = value;
-				_changed = true;
-			}
-		}
-		
-		public override uint32 Height
-		{
-			get => _height;
-
-			set
-			{
-				if(_height == value)
-					return;
-
-				_height = value;
-				_changed = true;
-			}
-		}
-
-		public override GraphicsContext Context => _context;
-
 		public this(GraphicsContext context)
 		{
 			_context = context;
@@ -64,7 +26,6 @@ namespace GlitchyEngine.Renderer
 		{
 			nativeDxgiDevice?.Release();
 			nativeSwapChain?.Release();
-			nativeBackBufferTarget?.Release();
 		}
 
 		void SetResolutionFromWindow()
@@ -101,7 +62,8 @@ namespace GlitchyEngine.Renderer
 
 			if(nativeSwapChain != null)
 			{
-				nativeBackBufferTarget.Release();
+				//nativeBackBufferTarget.Release();
+				_backBuffer.ReleaseRef();
 
 				var resizeResult = nativeSwapChain.ResizeBuffers(backBufferCount, _width, _height, backBufferFormat, .None);
 				if(resizeResult.Failed)
@@ -122,7 +84,7 @@ namespace GlitchyEngine.Renderer
 				swDesc.Height = _height;
 				swDesc.Format = backBufferFormat;
 				swDesc.SampleDescription = .(1, 0);
-				swDesc.BufferUsage = .RenderTargetOutput;
+				swDesc.BufferUsage = .RenderTargetOutput | .ShaderInput;
 				swDesc.BufferCount = backBufferCount;
 				swDesc.SwapEffect = .FlipDiscard;
 
@@ -138,14 +100,20 @@ namespace GlitchyEngine.Renderer
 				factory.Release();
 			}
 
-			nativeSwapChain.GetBuffer<ID3D11Texture2D>(0, let backBuffer);
-
-			RenderTargetViewDescription rtvDesc = .(backBuffer, .Texture2D, backBufferViewFormat);
-			NativeDevice.CreateRenderTargetView(backBuffer, &rtvDesc, &nativeBackBufferTarget);
+			RenderTarget2DDescription desc = .(backBufferFormat, _width, _height);
+			desc.DepthStencilFormat = _depthStencilFormat;
+			desc.IsSwapchainTarget = true;
 
+			// Todo: perhaps just update the render target
+			_backBuffer = new RenderTarget2D(desc);
+			
 			_backBufferViewport = GlitchyEngine.Renderer.Viewport(0, 0, _width, _height, 0.0f, 1.0f);
+		}
 
-			backBuffer.Release();
+		internal void GetBackbuffer(out ID3D11Texture2D* texture)
+		{
+			var result = nativeSwapChain.GetBuffer<ID3D11Texture2D>(0, out texture);
+			Log.EngineLogger.Assert(result.Succeeded, "Failed to get backbuffer.");
 		}
 
 		public override void Present()

GlitchyEngine/src/Renderer/BlendState.bf

@@ -85,8 +85,6 @@ namespace GlitchyEngine.Renderer
 			PlatformCreateBlendState();
 		}
 
-		public extern void Bind(ColorRGBA blendFactor = .White);
-
 		protected extern void PlatformCreateBlendState();
 	}
 }

GlitchyEngine/src/Renderer/GraphicsContext.bf

@@ -6,7 +6,8 @@ namespace GlitchyEngine.Renderer
 {
 	public class GraphicsContext : RefCounter
 	{
-		private RasterizerState _currentRasterizerState;
+		private static GraphicsContext s_GraphicsContext;
+		public static GraphicsContext Get() => s_GraphicsContext;
 
 		public extern SwapChain SwapChain {get;}
 
@@ -30,8 +31,9 @@ namespace GlitchyEngine.Renderer
 		 * @BindRenderTargets has to be called in order to bind the rendertargets.
 		 * @param renderTarget The render target to set. If null, the backbuffer will be set.
 		 * @param slot The slot to which the rendertarget will be bound. If 0 the depth buffer of the current render target will be set. If it has no depthbuffer the current will be unset.
+		 * @param setDepthTarget If set to true the depth stencil target of the given renderTarget will be bound (only applies if slot is 0).
 		 */
-		public extern void SetRenderTarget(RenderTarget2D renderTarget, int slot = 0);
+		public extern void SetRenderTarget(RenderTarget2D renderTarget, int slot = 0, bool setDepthTarget = true);
 
 		/**
 		 * Binds all.
@@ -80,19 +82,8 @@ namespace GlitchyEngine.Renderer
 
 		public extern void SetIndexBuffer(Buffer buffer, IndexFormat indexFormat = .Index16Bit, uint32 byteOffset = 0);
 
-		public void SetRasterizerState(RasterizerState rasterizerState)
-		{
-			_currentRasterizerState = rasterizerState;
-			SetRasterizerStateImpl();
-		}
-
 		protected extern void SetRasterizerStateImpl();
 
-		public RasterizerState GetRasterizerState()
-		{
-			return _currentRasterizerState;
-		}
-
 		internal void SetViewport(Viewport viewport)
 		{
 			var viewport;

GlitchyEngine/src/Renderer/RenderCommand.bf

@@ -3,12 +3,21 @@ using GlitchyEngine.Math;
 
 namespace GlitchyEngine.Renderer
 {
+	/*
 	public enum DepthStencilClearFlag
 	{
 		None = 0,
 		Depth = 1,
 		Stencil = 2
 	}
+	*/
+	public enum ClearOptions
+	{
+		None = 0,
+		Color = 1,
+		Depth = 2,
+		Stencil = 4
+	}
 
 	public static class RenderCommand
 	{
@@ -32,14 +41,39 @@ namespace GlitchyEngine.Renderer
 			_rendererAPI.Clear(renderTarget, color);
 		}
 
-		public static void Clear(DepthStencilTarget depthTarget, float depthValue, uint8 stencilValue, DepthStencilClearFlag clearFlags)
+		public static void Clear(DepthStencilTarget target, ClearOptions options, float depth, uint8 stencil)
 		{
-			_rendererAPI.Clear(depthTarget, depthValue, stencilValue, clearFlags);
+			_rendererAPI.Clear(target, options, depth, stencil);
 		}
 
-		public static void Clear(RenderTarget2D renderTarget, float depthValue, uint8 stencilValue, DepthStencilClearFlag clearFlags)
+		public static void Clear(RenderTarget2D renderTarget, ClearOptions options, ColorRGBA color, float depth, uint8 stencil)
 		{
-			_rendererAPI.Clear(renderTarget, depthValue, stencilValue, clearFlags);
+			_rendererAPI.Clear(renderTarget, options, color, depth, stencil);
+		}
+
+		public static void SetRenderTarget(RenderTarget2D renderTarget, int slot = 0, bool setDepthBuffer = false)
+		{
+			_rendererAPI.SetRenderTarget(renderTarget, slot, setDepthBuffer);
+		}
+
+		public static void SetDepthStencilTarget(DepthStencilTarget target)
+		{
+			_rendererAPI.SetDepthStencilTarget(target);
+		}
+
+		public static void BindRenderTargets()
+		{
+			_rendererAPI.BindRenderTargets();
+		}
+
+		public static void SetRasterizerState(RasterizerState rasterizerState)
+		{
+			_rendererAPI.SetRasterizerState(rasterizerState);
+		}
+
+		public static void SetBlendState(BlendState blendState, ColorRGBA blendFactor = .White)
+		{
+			_rendererAPI.SetBlendState(blendState, blendFactor);
 		}
 
 		[Inline]

GlitchyEngine/src/Renderer/RendererAPI.bf

@@ -17,11 +17,30 @@ namespace GlitchyEngine.Renderer
 
 		public extern void Init();
 
-		public extern void Clear(RenderTarget2D renderTarget, ColorRGBA clearColor);
+		public extern void Clear(RenderTarget2D renderTarget, ColorRGBA color);
 
-		public extern void Clear(DepthStencilTarget target, float depthValue, uint8 stencilValue, DepthStencilClearFlag clearFlags);
+		public extern void Clear(DepthStencilTarget target, ClearOptions options, float depth, uint8 stencil);
 		
-		public extern void Clear(RenderTarget2D renderTarget, float depthValue, uint8 stencilValue, DepthStencilClearFlag clearFlags);
+		public void Clear(RenderTarget2D renderTarget, ClearOptions options, ColorRGBA color, float depth, uint8 stencil)
+		{
+			var actualRt = (renderTarget ?? GraphicsContext.Get().SwapChain.BackBuffer);
+
+			if(options.HasFlag(.Color))
+				Clear(actualRt, color);
+
+			if((options.HasFlag(.Depth) || options.HasFlag(.Stencil)) && actualRt.DepthStencilTarget != null)
+				Clear(actualRt.DepthStencilTarget, options, depth, stencil);
+		}
+
+		public extern void SetRenderTarget(RenderTarget2D renderTarget, int slot, bool setDepthBuffer);
+
+		public extern void SetDepthStencilTarget(DepthStencilTarget target);
+
+		public extern void BindRenderTargets();
+
+		public extern void SetRasterizerState(RasterizerState rasterizerState);
+
+		public extern void SetBlendState(BlendState blendState, ColorRGBA blendFactor);
 
 		public extern void DrawIndexed(GeometryBinding geometry);
 

GlitchyEngine/src/Renderer/SwapChain.bf

@@ -2,22 +2,75 @@ namespace GlitchyEngine.Renderer
 {
 	public class SwapChain
 	{
+		private GraphicsContext _context;
+
+		private bool _changed;
+
+		private uint32 _width, _height;
+
 		private Viewport _backBufferViewport;
 
-		public extern GraphicsContext Context {get;}
+		private DepthStencilFormat _depthStencilFormat = .None;
+		
+		public RenderTarget2D _backBuffer ~ _?.ReleaseRef();
+
+		public GraphicsContext Context => _context;
 
 		/**
 		 * Gets or Sets the backbuffers width.
-		 * @remarks @ApplyChanges() needs to be called in order to apply the ganges.
+		 * @remarks @ApplyChanges() needs to be called in order to apply the changes.
 		 */
-		public extern uint32 Width {get; set;}
+		public uint32 Width
+		{
+			get => _width;
+			set
+			{
+				if(_width == value)
+					return;
+
+				_width = value;
+				_changed = true;
+			}
+		}
+		
 		/**
 		 * Gets or Sets the backbuffers height.
-		 * @remarks @ApplyChanges() needs to be called in order to apply the ganges.
+		 * @remarks @ApplyChanges() needs to be called in order to apply the changes.
 		 */
-		public extern uint32 Height {get; set;}
+		public uint32 Height
+		{
+			get => _height;
+			set
+			{
+				if(_height == value)
+					return;
+
+				_height = value;
+				_changed = true;
+			}
+		}
 
 		public Viewport BackbufferViewport => _backBufferViewport;
+		
+		/**
+		 * Gets or Sets the format of the depth stencil buffer.
+		 * If set to DepthStencilFormat.None DepthStencilTarget will be null.
+		 * @remarks @ApplyChanges() needs to be called in order to apply the changes.
+		 */
+		public DepthStencilFormat DepthStencilFormat
+		{
+			get => _depthStencilFormat;
+			set
+			{
+				if(_depthStencilFormat == value)
+					return;
+
+				_depthStencilFormat = value;
+				_changed = true;
+			}
+		}
+
+		public RenderTarget2D BackBuffer => _backBuffer;
 
 		public extern void Init();
 

Sandbox/src/ExampleLayer2D.bf

@@ -83,20 +83,20 @@ namespace Sandbox
 			cameraController.Update(gameTime);
 
 			RenderCommand.Clear(null, .(0.2f, 0.2f, 0.2f));
-			RenderCommand.Clear(_depthTarget, 1.0f, 0, .Depth);
+			RenderCommand.Clear(_depthTarget, .Depth, 1.0f, 0);
 			
 			// Draw test geometry
-			_context.SetRenderTarget(null);
-			_context.SetDepthStencilTarget(_depthTarget);
-			_context.BindRenderTargets();
+			RenderCommand.SetRenderTarget(null);
+			RenderCommand.SetDepthStencilTarget(_depthTarget);
+			RenderCommand.BindRenderTargets();
 
-			_context.SetRasterizerState(_rasterizerState);
+			RenderCommand.SetRasterizerState(_rasterizerState);
 
 			RenderCommand.SetViewport(_context.SwapChain.BackbufferViewport);
 
 			Renderer2D.BeginScene(cameraController.Camera, .BackToFront);
-			
-			_alphaBlendState.Bind();
+
+			RenderCommand.SetBlendState(_alphaBlendState);
 
 			for(int x < 10)
 			for(int y < 10)

Sandbox/src/SandboxApp.bf

@@ -346,22 +346,22 @@ namespace Sandbox
 			_cameraController.Update(gameTime);
 
 			RenderCommand.Clear(null, .(0.2f, 0.2f, 0.2f));
-			RenderCommand.Clear(_depthTarget, 1.0f, 0, .Depth);
+			RenderCommand.Clear(_depthTarget, .Depth, 1.0f, 0);
 
 			// Draw test geometry
-			_context.SetRenderTarget(null);
-			_context.SetDepthStencilTarget(_depthTarget);
-			_context.BindRenderTargets();
+			RenderCommand.SetRenderTarget(null);
+			RenderCommand.SetDepthStencilTarget(_depthTarget);
+			RenderCommand.BindRenderTargets();
 
 			RenderCommand.SetViewport(_context.SwapChain.BackbufferViewport);
 
 			Renderer.BeginScene(_cameraController.Camera);
 			
-			_opaqueBlendState.Bind();
+			RenderCommand.SetBlendState(_opaqueBlendState);
 
 			var basicEffect = Application.Get().EffectLibrary.Get("basicShader");
 
-			_context.SetRasterizerState(_rasterizerState);
+			RenderCommand.SetRasterizerState(_rasterizerState);
 			
 			TransformSystem.Update(_world);
 			
@@ -471,8 +471,8 @@ namespace Sandbox
 			_checkerMaterial.SetVariable("BaseColor", Color.White);
 
 			Renderer.Submit(_quadGeometryBinding, _checkerMaterial, Matrix.RotationZ(f) * .Scaling(1.5f));
-			
-			_alphaBlendState.Bind();
+
+			RenderCommand.SetBlendState(_alphaBlendState);
 			
 			_logoMaterial.SetVariable("BaseColor", Color.Pink);
 

Sandbox/src/TextureViewer.bf

@@ -169,8 +169,8 @@ namespace Sandbox
 			RenderCommand.SetViewport(vp);
 
 			// TODO: don't clear pink!
-			_context.ClearRenderTarget(_target, .Pink);
-			RenderCommand.Clear(_depth, 1.0f, 0, .Depth);
+			RenderCommand.Clear(_target, .Pink);
+			RenderCommand.Clear(_depth, .Depth, 1.0f, 0);
 
 			//_target.Bind();
 			_context.SetRenderTarget(_target);