Added ImGui

2026-09-05 21:01:52 +00:00 · 2020-11-12 23:25:48 +01:00
parent 6e71eeea25
commit 4b877af226
17 changed files with 524 additions and 44 deletions
@@ -0,0 +1,128 @@
+using System;
+using DirectX;
+using DirectX.D3D11;
+using DirectX.Common;
+using System.Diagnostics;
+using DirectX.DXGI;
+using DirectX.DXGI.DXGI1_2;
+using static System.Windows;
+
+namespace GlitchyEngine.Platform.DX11
+{
+	public static class DirectX
+	{
+		public static ID3D11Device* Device;
+		public static ID3D11DeviceContext* ImmediateContext;
+		
+		public static IDXGIDevice* DxgiDevice;
+		public static IDXGISwapChain1* SwapChain;
+
+		public static ID3D11RenderTargetView* BackBufferTarget;
+		public static Viewport BackBufferViewport;
+
+		static HWnd _windowHandle;
+
+		static ~this()
+		{
+			Shutdown();
+		}
+
+		public static void Init(HWnd windowHandle, uint32 width, uint32 height)
+		{
+			_windowHandle = windowHandle;
+
+			InitDevice();
+			UpdateSwapchain(width, height);
+		}
+
+		/**
+		 * Initializes the Device and ImmediateContext.
+		 */
+		static void InitDevice()
+		{
+			IUnknown.ReleaseAndNull!(ref Device);
+			IUnknown.ReleaseAndNull!(ref ImmediateContext);
+			
+			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, &Device, &deviceLevel, &ImmediateContext);
+			Debug.Assert(deviceResult.Succeeded, scope $"Failed to create D3D11 Device. Message(0x{(int32)deviceResult}): {deviceResult}");
+
+			Log.EngineLogger.Trace("D3D11 Device and Context created (Feature level: {})", deviceLevel);
+		}
+
+		/**
+		 * Initializes the swapchain.
+		 */
+		public static void UpdateSwapchain(uint32 width, uint32 height)
+		{
+			uint32 backBufferCount = 2;
+			Format backBufferFormat = .R8G8B8A8_UNorm;
+			Format backBufferViewFormat = .R8G8B8A8_UNorm; // _SRGB
+
+			if(SwapChain != null)
+			{
+				BackBufferTarget.Release();
+
+				SwapChain.ResizeBuffers(backBufferCount, width, height, backBufferFormat, .None);
+			}
+			else
+			{
+				Device.QueryInterface(out DxgiDevice);
+
+				DxgiDevice.GetAdapter(let adapter);
+				adapter.GetParent<IDXGIFactory2>(let factory);
+				adapter.Release();
+
+				SwapChainDescription1 swDesc = .();
+				swDesc.Width = width;
+				swDesc.Height = height;
+				swDesc.Format = backBufferFormat;
+				swDesc.SampleDescription = .(1, 0);
+				swDesc.BufferUsage = .RenderTargetOutput;
+				swDesc.BufferCount = backBufferCount;
+				swDesc.SwapEffect = .FlipDiscard;
+
+				SwapChainFullscreenDescription fsSwapChainDesc = .();
+				fsSwapChainDesc.Windowed = true;
+
+				factory.CreateSwapChainForHwnd((.)Device, _windowHandle, ref swDesc, &fsSwapChainDesc, null, &SwapChain);
+
+				factory.Release();
+			}
+
+			SwapChain.GetBuffer<ID3D11Texture2D>(0, let backBuffer);
+
+			RenderTargetViewDescription rtvDesc = .(backBuffer, .Texture2D, backBufferViewFormat);
+			Device.CreateRenderTargetView(backBuffer, &rtvDesc, &BackBufferTarget);
+
+			BackBufferViewport = Viewport(0, 0, width, height, 0.0f, 1.0f);
+
+			backBuffer.Release();
+		}
+
+		public static void Shutdown()
+		{
+			IUnknown.ReleaseAndNull!(ref Device);
+			IUnknown.ReleaseAndNull!(ref ImmediateContext);
+
+			IUnknown.ReleaseAndNull!(ref DxgiDevice);
+			IUnknown.ReleaseAndNull!(ref SwapChain);
+
+			IUnknown.ReleaseAndNull!(ref BackBufferTarget);
+		}
+
+		public static void Present()
+		{
+			SwapChain.Present(Application.Get.Window.IsVSync ? 1 : 0, .None);
+		}
+	}
+}