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ImGuiController with viewports
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@ -1,6 +1,8 @@
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# MoonWorksDearImGuiScaffold
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A starter project that you can use to get a MoonWorks + Dear ImGui application up and running.
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A starter project that you can use to get a MoonWorks + Dear ImGui application up and running. With docking and viewport support.
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> NOTE: The `ImGuiController` relies on `Window.Handle` by default this is an internal getter, make it public for this to run/compile.
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## Usage
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@ -11,3 +13,5 @@ Add your ImGui commands to the `ImGuiCommands` method.
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In VSCode, press Ctrl-Shift-B to bring up the build menu.
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You can also use the `dotnet` CLI interface to build or publish.
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BIN
assets/Showcase.png
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BIN
assets/Showcase.png
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Binary file not shown.
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After Width: | Height: | Size: 572 KiB |
649
src/ImGuiController.cs
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src/ImGuiController.cs
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// ImGuiController with docking and viewport support for MoonWorks/Refresh.
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// Based on the example im ImGui.NET and MoonWorksDearImGuiScaffold.
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// One change is needed in MoonWorks, and that is to make Window.Handle a public getter.
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using ImGuiNET;
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using MoonWorks;
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using MoonWorks.Graphics;
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using MoonWorks.Input;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Numerics;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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namespace MoonWorksDearImGuiScaffold;
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internal class ImGuiController : IDisposable
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{
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public event Action OnGui;
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private readonly string shaderContentPath = Path.Combine(System.AppContext.BaseDirectory, "Content", "Shaders");
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private readonly GraphicsDevice graphicsDevice;
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private readonly Window mainWindow;
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private readonly Inputs inputs;
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private readonly Color clearColor;
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private readonly Platform_CreateWindow createWindow;
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private readonly Platform_DestroyWindow destroyWindow;
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private readonly Platform_GetWindowPos getWindowPos;
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private readonly Platform_ShowWindow showWindow;
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private readonly Platform_SetWindowPos setWindowPos;
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private readonly Platform_SetWindowSize setWindowSize;
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private readonly Platform_GetWindowSize getWindowSize;
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private readonly Platform_SetWindowFocus setWindowFocus;
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private readonly Platform_GetWindowFocus getWindowFocus;
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private readonly Platform_GetWindowMinimized getWindowMinimized;
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private readonly Platform_SetWindowTitle setWindowTitle;
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private readonly GraphicsPipeline imGuiPipeline;
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private readonly ShaderModule imGuiVertexShader;
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private readonly ShaderModule imGuiFragmentShader;
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private readonly Sampler imGuiSampler;
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private readonly TextureStorage textureStorage = new TextureStorage();
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private readonly Dictionary<Window, GCHandle> windows = new Dictionary<Window, GCHandle>(16);
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private Texture fontTexture = null;
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private uint vertexCount = 0;
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private uint indexCount = 0;
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private MoonWorks.Graphics.Buffer imGuiVertexBuffer = null;
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private MoonWorks.Graphics.Buffer imGuiIndexBuffer = null;
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private bool frameBegun = false;
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public ImGuiController(GraphicsDevice graphicsDevice, Window mainWindow, Inputs inputs, Color clearColor, ImGuiConfigFlags configFlags = ImGuiConfigFlags.NavEnableKeyboard | ImGuiConfigFlags.DockingEnable | ImGuiConfigFlags.ViewportsEnable)
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{
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this.mainWindow = mainWindow;
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this.graphicsDevice = graphicsDevice;
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this.inputs = inputs;
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this.clearColor = clearColor;
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ImGui.CreateContext();
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ImGuiIOPtr io = ImGui.GetIO();
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io.DisplaySize = new Vector2(mainWindow.Width, mainWindow.Height);
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io.DisplayFramebufferScale = Vector2.One;
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imGuiVertexShader = new ShaderModule(graphicsDevice, Path.Combine(shaderContentPath, "ImGui.vert.refresh"));
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imGuiFragmentShader = new ShaderModule(graphicsDevice, Path.Combine(shaderContentPath, "ImGui.frag.refresh"));
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imGuiSampler = new Sampler(graphicsDevice, SamplerCreateInfo.LinearClamp);
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imGuiPipeline = new GraphicsPipeline(
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graphicsDevice,
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new GraphicsPipelineCreateInfo
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{
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AttachmentInfo = new GraphicsPipelineAttachmentInfo(
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new ColorAttachmentDescription(
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mainWindow.SwapchainFormat,
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ColorAttachmentBlendState.NonPremultiplied
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)
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),
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DepthStencilState = DepthStencilState.Disable,
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VertexShaderInfo = GraphicsShaderInfo.Create<Matrix4x4>(imGuiVertexShader, "main", 0),
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FragmentShaderInfo = GraphicsShaderInfo.Create(imGuiFragmentShader, "main", 1),
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VertexInputState = VertexInputState.CreateSingleBinding<Position2DTextureColorVertex>(),
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PrimitiveType = PrimitiveType.TriangleList,
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RasterizerState = RasterizerState.CW_CullNone,
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MultisampleState = MultisampleState.None
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}
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);
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BuildFontAtlas();
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Inputs.TextInput += c =>
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{
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if (c == '\t') { return; }
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io.AddInputCharacter(c);
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};
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io.ConfigFlags = configFlags;
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io.MouseDrawCursor = true;
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if (!OperatingSystem.IsWindows())
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{
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io.SetClipboardTextFn = Clipboard.SetFnPtr;
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io.GetClipboardTextFn = Clipboard.GetFnPtr;
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}
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ImGuiPlatformIOPtr platformIO = ImGui.GetPlatformIO();
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ImGuiViewportPtr mainViewport = platformIO.Viewports[0];
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mainViewport.PlatformHandle = mainWindow.Handle;
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GCHandle handle = GCHandle.Alloc(mainWindow);
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mainViewport.PlatformUserData = (IntPtr)handle;
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windows.Add(mainWindow, handle);
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unsafe
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{
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createWindow = CreateWindow;
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destroyWindow = DestroyWindow;
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getWindowPos = GetWindowPos;
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showWindow = ShowWindow;
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setWindowPos = SetWindowPos;
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setWindowSize = SetWindowSize;
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getWindowSize = GetWindowSize;
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setWindowFocus = SetWindowFocus;
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getWindowFocus = GetWindowFocus;
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getWindowMinimized = GetWindowMinimized;
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setWindowTitle = SetWindowTitle;
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platformIO.Platform_CreateWindow = Marshal.GetFunctionPointerForDelegate(createWindow);
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platformIO.Platform_DestroyWindow = Marshal.GetFunctionPointerForDelegate(destroyWindow);
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platformIO.Platform_ShowWindow = Marshal.GetFunctionPointerForDelegate(showWindow);
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platformIO.Platform_SetWindowPos = Marshal.GetFunctionPointerForDelegate(setWindowPos);
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platformIO.Platform_SetWindowSize = Marshal.GetFunctionPointerForDelegate(setWindowSize);
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platformIO.Platform_SetWindowFocus = Marshal.GetFunctionPointerForDelegate(setWindowFocus);
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platformIO.Platform_GetWindowFocus = Marshal.GetFunctionPointerForDelegate(getWindowFocus);
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platformIO.Platform_GetWindowMinimized = Marshal.GetFunctionPointerForDelegate(getWindowMinimized);
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platformIO.Platform_SetWindowTitle = Marshal.GetFunctionPointerForDelegate(setWindowTitle);
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ImGuiNative.ImGuiPlatformIO_Set_Platform_GetWindowPos(platformIO.NativePtr, Marshal.GetFunctionPointerForDelegate(getWindowPos));
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ImGuiNative.ImGuiPlatformIO_Set_Platform_GetWindowSize(platformIO.NativePtr, Marshal.GetFunctionPointerForDelegate(getWindowSize));
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}
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io.BackendFlags |= ImGuiBackendFlags.HasMouseCursors;
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io.BackendFlags |= ImGuiBackendFlags.HasSetMousePos;
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io.BackendFlags |= ImGuiBackendFlags.PlatformHasViewports;
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io.BackendFlags |= ImGuiBackendFlags.RendererHasViewports;
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}
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public void Update(float deltaTime)
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{
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if (frameBegun)
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{
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ImGui.Render();
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ImGui.UpdatePlatformWindows();
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}
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UpdatePerFrameImGuiData(deltaTime);
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UpdateInput();
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UpdateMonitors();
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frameBegun = true;
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ImGui.NewFrame();
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OnGui?.Invoke();
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ImGui.EndFrame();
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}
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private void UpdatePerFrameImGuiData(float deltaSeconds)
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{
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ImGuiIOPtr io = ImGui.GetIO();
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io.DisplaySize = new Vector2(mainWindow.Width, mainWindow.Height);
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io.DisplayFramebufferScale = new Vector2(1, 1);
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io.DeltaTime = deltaSeconds; // DeltaTime is in seconds.
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}
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private void UpdateInput()
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{
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ImGuiIOPtr io = ImGui.GetIO();
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if ((ImGui.GetIO().ConfigFlags & ImGuiConfigFlags.ViewportsEnable) != 0)
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{
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// For viewports we use the global mouse position.
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_ = SDL2.SDL.SDL_GetGlobalMouseState(out int x, out int y);
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io.MousePos = new Vector2(x, y);
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}
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else
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{
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// Without viewports we need to use the relative position.
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//_ = SDL2.SDL.SDL_GetMouseState(out int x, out int y);
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io.MousePos = new Vector2(inputs.Mouse.X, inputs.Mouse.Y);
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}
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io.MouseDown[0] = inputs.Mouse.LeftButton.IsDown;
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io.MouseDown[1] = inputs.Mouse.RightButton.IsDown;
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io.MouseDown[2] = inputs.Mouse.MiddleButton.IsDown;
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io.MouseWheel = inputs.Mouse.Wheel;
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io.AddKeyEvent(ImGuiKey.A, inputs.Keyboard.IsDown(KeyCode.A));
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io.AddKeyEvent(ImGuiKey.Z, inputs.Keyboard.IsDown(KeyCode.Z));
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io.AddKeyEvent(ImGuiKey.Y, inputs.Keyboard.IsDown(KeyCode.Y));
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io.AddKeyEvent(ImGuiKey.X, inputs.Keyboard.IsDown(KeyCode.X));
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io.AddKeyEvent(ImGuiKey.C, inputs.Keyboard.IsDown(KeyCode.C));
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io.AddKeyEvent(ImGuiKey.V, inputs.Keyboard.IsDown(KeyCode.V));
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io.AddKeyEvent(ImGuiKey.Tab, inputs.Keyboard.IsDown(KeyCode.Tab));
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io.AddKeyEvent(ImGuiKey.LeftArrow, inputs.Keyboard.IsDown(KeyCode.Left));
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io.AddKeyEvent(ImGuiKey.RightArrow, inputs.Keyboard.IsDown(KeyCode.Right));
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io.AddKeyEvent(ImGuiKey.UpArrow, inputs.Keyboard.IsDown(KeyCode.Up));
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io.AddKeyEvent(ImGuiKey.DownArrow, inputs.Keyboard.IsDown(KeyCode.Down));
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io.AddKeyEvent(ImGuiKey.Enter, inputs.Keyboard.IsDown(KeyCode.Return));
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io.AddKeyEvent(ImGuiKey.Escape, inputs.Keyboard.IsDown(KeyCode.Escape));
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io.AddKeyEvent(ImGuiKey.Delete, inputs.Keyboard.IsDown(KeyCode.Delete));
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io.AddKeyEvent(ImGuiKey.Backspace, inputs.Keyboard.IsDown(KeyCode.Backspace));
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io.AddKeyEvent(ImGuiKey.Home, inputs.Keyboard.IsDown(KeyCode.Home));
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io.AddKeyEvent(ImGuiKey.End, inputs.Keyboard.IsDown(KeyCode.End));
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io.AddKeyEvent(ImGuiKey.PageDown, inputs.Keyboard.IsDown(KeyCode.PageDown));
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io.AddKeyEvent(ImGuiKey.PageUp, inputs.Keyboard.IsDown(KeyCode.PageUp));
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io.AddKeyEvent(ImGuiKey.Insert, inputs.Keyboard.IsDown(KeyCode.Insert));
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io.AddKeyEvent(ImGuiKey.ModCtrl, inputs.Keyboard.IsDown(KeyCode.LeftControl) || inputs.Keyboard.IsDown(KeyCode.RightControl));
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io.AddKeyEvent(ImGuiKey.ModShift, inputs.Keyboard.IsDown(KeyCode.LeftShift) || inputs.Keyboard.IsDown(KeyCode.RightShift));
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io.AddKeyEvent(ImGuiKey.ModAlt, inputs.Keyboard.IsDown(KeyCode.LeftAlt) || inputs.Keyboard.IsDown(KeyCode.RightAlt));
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io.AddKeyEvent(ImGuiKey.ModSuper, inputs.Keyboard.IsDown(KeyCode.LeftMeta) || inputs.Keyboard.IsDown(KeyCode.RightMeta));
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}
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private unsafe void UpdateMonitors()
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{
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ImGuiPlatformIOPtr platformIO = ImGui.GetPlatformIO();
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Marshal.FreeHGlobal(platformIO.NativePtr->Monitors.Data);
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int videoDisplayCount = SDL2.SDL.SDL_GetNumVideoDisplays();
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IntPtr data = Marshal.AllocHGlobal(Unsafe.SizeOf<ImGuiPlatformMonitor>() * videoDisplayCount);
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platformIO.NativePtr->Monitors = new ImVector(videoDisplayCount, videoDisplayCount, data);
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for (int i = 0; i < videoDisplayCount; i++)
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{
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_ = SDL2.SDL.SDL_GetDisplayUsableBounds(i, out SDL2.SDL.SDL_Rect usableBounds);
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_ = SDL2.SDL.SDL_GetDisplayBounds(i, out SDL2.SDL.SDL_Rect bounds);
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_ = SDL2.SDL.SDL_GetDisplayDPI(i, out float ddpi, out float hdpi, out float vdpi);
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ImGuiPlatformMonitorPtr monitor = platformIO.Monitors[i];
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float standardDpi = 96f; // Standard DPI typically used
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monitor.DpiScale = hdpi / standardDpi;
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monitor.MainPos = new Vector2(bounds.x, bounds.y);
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monitor.MainSize = new Vector2(bounds.w, bounds.h);
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monitor.WorkPos = new Vector2(usableBounds.x, usableBounds.y);
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monitor.WorkSize = new Vector2(usableBounds.w, usableBounds.h);
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}
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}
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public void Render()
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{
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if (!frameBegun)
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{
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return;
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}
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frameBegun = false;
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if ((ImGui.GetIO().ConfigFlags & ImGuiConfigFlags.ViewportsEnable) != 0)
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{
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ImGui.Render();
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ImGui.UpdatePlatformWindows();
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ImGuiPlatformIOPtr platformIO = ImGui.GetPlatformIO();
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for (int i = 0; i < platformIO.Viewports.Size; i++)
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{
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ImGuiViewportPtr vp = platformIO.Viewports[i];
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Window window = (Window)GCHandle.FromIntPtr(vp.PlatformUserData).Target;
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if (!window.Claimed)
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{
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continue;
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}
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UpdateImGuiBuffers(vp.DrawData);
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CommandBuffer commandBuffer = graphicsDevice.AcquireCommandBuffer();
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Texture swapchainTexture = commandBuffer.AcquireSwapchainTexture(window);
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if (swapchainTexture != null)
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{
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RenderCommandLists(commandBuffer, swapchainTexture, vp.DrawData);
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graphicsDevice.Submit(commandBuffer);
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graphicsDevice.Wait();
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}
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}
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}
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else
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{
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ImGui.Render();
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if (!mainWindow.Claimed)
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{
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return;
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}
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ImDrawDataPtr drawDataPtr = ImGui.GetDrawData();
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UpdateImGuiBuffers(drawDataPtr);
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CommandBuffer commandBuffer = graphicsDevice.AcquireCommandBuffer();
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Texture swapchainTexture = commandBuffer.AcquireSwapchainTexture(mainWindow);
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if (swapchainTexture != null)
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{
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RenderCommandLists(commandBuffer, swapchainTexture, drawDataPtr);
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graphicsDevice.Submit(commandBuffer);
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graphicsDevice.Wait();
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}
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}
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}
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private unsafe void UpdateImGuiBuffers(ImDrawDataPtr drawDataPtr)
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{
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if (drawDataPtr.TotalVtxCount == 0 || drawDataPtr.CmdListsCount == 0)
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{
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return;
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}
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CommandBuffer commandBuffer = graphicsDevice.AcquireCommandBuffer();
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if (drawDataPtr.TotalVtxCount > vertexCount)
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{
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imGuiVertexBuffer?.Dispose();
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vertexCount = (uint)(drawDataPtr.TotalVtxCount * 1.5f);
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imGuiVertexBuffer = MoonWorks.Graphics.Buffer.Create<Position2DTextureColorVertex>(
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graphicsDevice,
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BufferUsageFlags.Vertex,
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vertexCount
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);
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}
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if (drawDataPtr.TotalIdxCount > indexCount)
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{
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imGuiIndexBuffer?.Dispose();
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indexCount = (uint)(drawDataPtr.TotalIdxCount * 1.5f);
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imGuiIndexBuffer = MoonWorks.Graphics.Buffer.Create<ushort>(
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graphicsDevice,
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BufferUsageFlags.Index,
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indexCount
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);
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}
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uint vertexOffset = 0;
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uint indexOffset = 0;
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for (int n = 0; n < drawDataPtr.CmdListsCount; n++)
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{
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ImDrawListPtr cmdList = drawDataPtr.CmdLists[n];
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commandBuffer.SetBufferData<Position2DTextureColorVertex>(
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imGuiVertexBuffer,
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cmdList.VtxBuffer.Data,
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vertexOffset,
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(uint)cmdList.VtxBuffer.Size
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);
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commandBuffer.SetBufferData<ushort>(
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imGuiIndexBuffer,
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cmdList.IdxBuffer.Data,
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indexOffset,
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(uint)cmdList.IdxBuffer.Size
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);
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vertexOffset += (uint)cmdList.VtxBuffer.Size;
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indexOffset += (uint)cmdList.IdxBuffer.Size;
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}
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graphicsDevice.Submit(commandBuffer);
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}
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private void RenderCommandLists(CommandBuffer commandBuffer, Texture renderTexture, ImDrawDataPtr drawDataPtr)
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{
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Vector2 pos = drawDataPtr.DisplayPos;
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commandBuffer.BeginRenderPass(
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new ColorAttachmentInfo(renderTexture, clearColor)
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);
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commandBuffer.BindGraphicsPipeline(imGuiPipeline);
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// It is possible that the buffers are null (for example nothing is in our main windows viewport, then we exixt early but still clear it).
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if (imGuiVertexBuffer == null || imGuiIndexBuffer == null)
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{
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commandBuffer.EndRenderPass();
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return;
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}
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Matrix4x4 projectionMatrix = Matrix4x4.CreateOrthographicOffCenter(
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pos.X,
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pos.X + drawDataPtr.DisplaySize.X,
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pos.Y,
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pos.Y + drawDataPtr.DisplaySize.Y,
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-1.0f,
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1.0f
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);
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uint vertexUniformOffset = commandBuffer.PushVertexShaderUniforms(projectionMatrix);
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commandBuffer.BindVertexBuffers(imGuiVertexBuffer);
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commandBuffer.BindIndexBuffer(imGuiIndexBuffer, IndexElementSize.Sixteen);
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uint vertexOffset = 0;
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uint indexOffset = 0;
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for (int n = 0; n < drawDataPtr.CmdListsCount; n++)
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{
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ImDrawListPtr cmdList = drawDataPtr.CmdLists[n];
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for (int cmdIndex = 0; cmdIndex < cmdList.CmdBuffer.Size; cmdIndex++)
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{
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ImDrawCmdPtr drawCmd = cmdList.CmdBuffer[cmdIndex];
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Texture texture = textureStorage.GetTexture(drawCmd.TextureId);
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if (texture == null)
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{
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Logger.LogError("Texture or drawCmd.TextureId became null. Fit it!");
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continue;
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}
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TextureSamplerBinding binding = new TextureSamplerBinding(texture, imGuiSampler);
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commandBuffer.BindFragmentSamplers(binding);
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float width = drawCmd.ClipRect.Z - (int)drawCmd.ClipRect.X;
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float height = drawCmd.ClipRect.W - (int)drawCmd.ClipRect.Y;
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||||
|
||||
if (width <= 0 || height <= 0)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
|
||||
commandBuffer.SetScissor(
|
||||
new Rect(
|
||||
(int)drawCmd.ClipRect.X - (int)pos.X,
|
||||
(int)drawCmd.ClipRect.Y - (int)pos.Y,
|
||||
(int)drawCmd.ClipRect.Z - (int)drawCmd.ClipRect.X,
|
||||
(int)drawCmd.ClipRect.W - (int)drawCmd.ClipRect.Y
|
||||
)
|
||||
);
|
||||
|
||||
commandBuffer.DrawIndexedPrimitives(
|
||||
vertexOffset,
|
||||
indexOffset,
|
||||
drawCmd.ElemCount / 3,
|
||||
vertexUniformOffset,
|
||||
0
|
||||
);
|
||||
|
||||
indexOffset += drawCmd.ElemCount;
|
||||
}
|
||||
|
||||
vertexOffset += (uint)cmdList.VtxBuffer.Size;
|
||||
}
|
||||
|
||||
commandBuffer.EndRenderPass();
|
||||
}
|
||||
|
||||
private void BuildFontAtlas()
|
||||
{
|
||||
CommandBuffer commandBuffer = graphicsDevice.AcquireCommandBuffer();
|
||||
|
||||
ImGuiIOPtr io = ImGui.GetIO();
|
||||
|
||||
io.Fonts.GetTexDataAsRGBA32(
|
||||
out nint pixelData,
|
||||
out int width,
|
||||
out int height,
|
||||
out int bytesPerPixel
|
||||
);
|
||||
|
||||
Texture fontTexture = Texture.CreateTexture2D(
|
||||
graphicsDevice,
|
||||
(uint)width,
|
||||
(uint)height,
|
||||
TextureFormat.R8G8B8A8,
|
||||
TextureUsageFlags.Sampler
|
||||
);
|
||||
|
||||
commandBuffer.SetTextureData(fontTexture, pixelData, (uint)(width * height * bytesPerPixel));
|
||||
|
||||
graphicsDevice.Submit(commandBuffer);
|
||||
|
||||
io.Fonts.SetTexID(fontTexture.Handle);
|
||||
io.Fonts.ClearTexData();
|
||||
|
||||
textureStorage.Add(fontTexture); // <-- The fontTexture seems to get lost after some time (CG?).
|
||||
this.fontTexture = fontTexture; // <-- So we also keep a reference to make sure it doesn't happen.
|
||||
}
|
||||
|
||||
#region Window
|
||||
private void CreateWindow(ImGuiViewportPtr vp)
|
||||
{
|
||||
WindowCreateInfo info = new WindowCreateInfo("Window Title", (uint)vp.Pos.X, (uint)vp.Pos.Y, ScreenMode.Windowed, PresentMode.FIFO);
|
||||
|
||||
SDL2.SDL.SDL_WindowFlags flags = graphicsDevice.WindowFlags;
|
||||
flags |= SDL2.SDL.SDL_WindowFlags.SDL_WINDOW_HIDDEN;
|
||||
|
||||
if ((vp.Flags & ImGuiViewportFlags.NoTaskBarIcon) != 0)
|
||||
{
|
||||
flags |= SDL2.SDL.SDL_WindowFlags.SDL_WINDOW_SKIP_TASKBAR;
|
||||
}
|
||||
|
||||
if ((vp.Flags & ImGuiViewportFlags.NoDecoration) != 0)
|
||||
{
|
||||
flags |= SDL2.SDL.SDL_WindowFlags.SDL_WINDOW_BORDERLESS;
|
||||
}
|
||||
else
|
||||
{
|
||||
flags |= SDL2.SDL.SDL_WindowFlags.SDL_WINDOW_RESIZABLE;
|
||||
}
|
||||
|
||||
if ((vp.Flags & ImGuiViewportFlags.TopMost) != 0)
|
||||
{
|
||||
flags |= SDL2.SDL.SDL_WindowFlags.SDL_WINDOW_ALWAYS_ON_TOP;
|
||||
}
|
||||
|
||||
Window window = new Window(info, flags);
|
||||
graphicsDevice.ClaimWindow(window, PresentMode.FIFO);
|
||||
|
||||
GCHandle handle = GCHandle.Alloc(window);
|
||||
vp.PlatformUserData = (IntPtr)handle;
|
||||
|
||||
windows.Add(window, handle);
|
||||
}
|
||||
|
||||
private void DestroyWindow(ImGuiViewportPtr vp)
|
||||
{
|
||||
if (vp.PlatformUserData == IntPtr.Zero) return;
|
||||
|
||||
Window window = (Window)GCHandle.FromIntPtr(vp.PlatformUserData).Target;
|
||||
graphicsDevice.UnclaimWindow(window);
|
||||
|
||||
if (windows.TryGetValue(window, out GCHandle handle))
|
||||
{
|
||||
handle.Free();
|
||||
windows.Remove(window);
|
||||
}
|
||||
|
||||
graphicsDevice.Wait();
|
||||
window.Dispose();
|
||||
}
|
||||
|
||||
private void ShowWindow(ImGuiViewportPtr vp)
|
||||
{
|
||||
if (vp.PlatformUserData == IntPtr.Zero) return;
|
||||
|
||||
Window window = (Window)GCHandle.FromIntPtr(vp.PlatformUserData).Target;
|
||||
SDL2.SDL.SDL_ShowWindow(window.Handle);
|
||||
}
|
||||
|
||||
private unsafe void GetWindowPos(ImGuiViewportPtr vp, Vector2* outPos)
|
||||
{
|
||||
if (vp.PlatformUserData == IntPtr.Zero) return;
|
||||
|
||||
Window window = (Window)GCHandle.FromIntPtr(vp.PlatformUserData).Target;
|
||||
SDL2.SDL.SDL_GetWindowPosition(window.Handle, out int x, out int y);
|
||||
*outPos = new Vector2(x, y);
|
||||
}
|
||||
|
||||
private void SetWindowPos(ImGuiViewportPtr vp, Vector2 pos)
|
||||
{
|
||||
if (vp.PlatformUserData == IntPtr.Zero) return;
|
||||
|
||||
Window window = (Window)GCHandle.FromIntPtr(vp.PlatformUserData).Target;
|
||||
SDL2.SDL.SDL_SetWindowPosition(window.Handle, (int)pos.X, (int)pos.Y);
|
||||
}
|
||||
|
||||
private void SetWindowSize(ImGuiViewportPtr vp, Vector2 size)
|
||||
{
|
||||
if (vp.PlatformUserData == IntPtr.Zero) return;
|
||||
|
||||
Window window = (Window)GCHandle.FromIntPtr(vp.PlatformUserData).Target;
|
||||
SDL2.SDL.SDL_SetWindowSize(window.Handle, (int)size.X, (int)size.Y);
|
||||
}
|
||||
|
||||
private unsafe void GetWindowSize(ImGuiViewportPtr vp, Vector2* outSize)
|
||||
{
|
||||
if (vp.PlatformUserData == IntPtr.Zero) return;
|
||||
|
||||
Window window = (Window)GCHandle.FromIntPtr(vp.PlatformUserData).Target;
|
||||
SDL2.SDL.SDL_GetWindowSize(window.Handle, out int w, out int h);
|
||||
*outSize = new Vector2(w, h);
|
||||
}
|
||||
|
||||
private void SetWindowFocus(ImGuiViewportPtr vp)
|
||||
{
|
||||
if (vp.PlatformUserData == IntPtr.Zero) return;
|
||||
|
||||
Window window = (Window)GCHandle.FromIntPtr(vp.PlatformUserData).Target;
|
||||
//SDL2.SDL.SDL_SetWindowInputFocus(window.Handle);
|
||||
SDL2.SDL.SDL_RaiseWindow(window.Handle);
|
||||
}
|
||||
|
||||
private byte GetWindowFocus(ImGuiViewportPtr vp)
|
||||
{
|
||||
if (vp.PlatformUserData == IntPtr.Zero) return (byte)0;
|
||||
|
||||
Window window = (Window)GCHandle.FromIntPtr(vp.PlatformUserData).Target;
|
||||
SDL2.SDL.SDL_WindowFlags flags = (SDL2.SDL.SDL_WindowFlags)SDL2.SDL.SDL_GetWindowFlags(window.Handle);
|
||||
return (flags & SDL2.SDL.SDL_WindowFlags.SDL_WINDOW_INPUT_FOCUS) != 0 ? (byte)1 : (byte)0;
|
||||
}
|
||||
|
||||
private byte GetWindowMinimized(ImGuiViewportPtr vp)
|
||||
{
|
||||
if (vp.PlatformUserData == IntPtr.Zero) return (byte)0;
|
||||
|
||||
Window window = (Window)GCHandle.FromIntPtr(vp.PlatformUserData).Target;
|
||||
SDL2.SDL.SDL_WindowFlags flags = (SDL2.SDL.SDL_WindowFlags)SDL2.SDL.SDL_GetWindowFlags(window.Handle);
|
||||
return (flags & SDL2.SDL.SDL_WindowFlags.SDL_WINDOW_MINIMIZED) != 0 ? (byte)1 : (byte)0;
|
||||
}
|
||||
|
||||
private unsafe void SetWindowTitle(ImGuiViewportPtr vp, IntPtr title)
|
||||
{
|
||||
if (vp.PlatformUserData == IntPtr.Zero) return;
|
||||
|
||||
Window window = (Window)GCHandle.FromIntPtr(vp.PlatformUserData).Target;
|
||||
byte* titlePtr = (byte*)title;
|
||||
int count = 0;
|
||||
while (titlePtr[count] != 0)
|
||||
{
|
||||
count += 1;
|
||||
}
|
||||
SDL2.SDL.SDL_SetWindowTitle(window.Handle, System.Text.Encoding.ASCII.GetString(titlePtr, count));
|
||||
}
|
||||
#endregion
|
||||
|
||||
public void Dispose()
|
||||
{
|
||||
fontTexture.Dispose();
|
||||
imGuiVertexBuffer.Dispose();
|
||||
imGuiIndexBuffer.Dispose();
|
||||
imGuiFragmentShader.Dispose();
|
||||
imGuiVertexShader.Dispose();
|
||||
imGuiPipeline.Dispose();
|
||||
imGuiSampler.Dispose();
|
||||
|
||||
foreach (KeyValuePair<Window, GCHandle> window in windows)
|
||||
{
|
||||
graphicsDevice.UnclaimWindow(window.Key);
|
||||
window.Key.Dispose();
|
||||
window.Value.Free();
|
||||
}
|
||||
windows.Clear();
|
||||
}
|
||||
}
|
||||
@ -1,341 +1,37 @@
|
||||
using MoonWorks.Graphics;
|
||||
using MoonWorks.Input;
|
||||
using MoonWorks;
|
||||
using ImGuiNET;
|
||||
using System.IO;
|
||||
using MoonWorks.Math.Float;
|
||||
using System;
|
||||
using MoonWorks;
|
||||
using MoonWorks.Graphics;
|
||||
|
||||
namespace MoonWorksDearImGuiScaffold;
|
||||
|
||||
class MoonWorksDearImGuiScaffoldGame : Game
|
||||
{
|
||||
private string ShaderContentPath = Path.Combine(System.AppContext.BaseDirectory, "Content", "Shaders");
|
||||
|
||||
private GraphicsPipeline ImGuiPipeline;
|
||||
private ShaderModule ImGuiVertexShader;
|
||||
private ShaderModule ImGuiFragmentShader;
|
||||
private Sampler ImGuiSampler;
|
||||
|
||||
private uint VertexCount = 0;
|
||||
private uint IndexCount = 0;
|
||||
private MoonWorks.Graphics.Buffer ImGuiVertexBuffer = null;
|
||||
private MoonWorks.Graphics.Buffer ImGuiIndexBuffer = null;
|
||||
|
||||
private TextureStorage TextureStorage;
|
||||
|
||||
public MoonWorksDearImGuiScaffoldGame(
|
||||
WindowCreateInfo windowCreateInfo,
|
||||
FrameLimiterSettings frameLimiterSettings,
|
||||
bool debugMode
|
||||
) : base(windowCreateInfo, frameLimiterSettings, 60, debugMode)
|
||||
{
|
||||
TextureStorage = new TextureStorage();
|
||||
|
||||
ImGui.CreateContext();
|
||||
|
||||
var io = ImGui.GetIO();
|
||||
io.DisplaySize = new System.Numerics.Vector2(MainWindow.Width, MainWindow.Height);
|
||||
io.DisplayFramebufferScale = System.Numerics.Vector2.One;
|
||||
|
||||
ImGuiVertexShader =
|
||||
new ShaderModule(GraphicsDevice, Path.Combine(ShaderContentPath, "ImGui.vert.refresh"));
|
||||
ImGuiFragmentShader =
|
||||
new ShaderModule(GraphicsDevice, Path.Combine(ShaderContentPath, "ImGui.frag.refresh"));
|
||||
|
||||
|
||||
ImGuiSampler = new Sampler(GraphicsDevice, SamplerCreateInfo.LinearClamp);
|
||||
|
||||
ImGuiPipeline = new GraphicsPipeline(
|
||||
GraphicsDevice,
|
||||
new GraphicsPipelineCreateInfo
|
||||
{
|
||||
AttachmentInfo = new GraphicsPipelineAttachmentInfo(
|
||||
new ColorAttachmentDescription(
|
||||
MainWindow.SwapchainFormat,
|
||||
ColorAttachmentBlendState.NonPremultiplied
|
||||
)
|
||||
),
|
||||
DepthStencilState = DepthStencilState.Disable,
|
||||
VertexShaderInfo = GraphicsShaderInfo.Create<Matrix4x4>(ImGuiVertexShader, "main", 0),
|
||||
FragmentShaderInfo = GraphicsShaderInfo.Create(ImGuiFragmentShader, "main", 1),
|
||||
VertexInputState = VertexInputState.CreateSingleBinding<Position2DTextureColorVertex>(),
|
||||
PrimitiveType = PrimitiveType.TriangleList,
|
||||
RasterizerState = RasterizerState.CW_CullNone,
|
||||
MultisampleState = MultisampleState.None
|
||||
}
|
||||
);
|
||||
|
||||
BuildFontAtlas();
|
||||
|
||||
MainWindow.RegisterSizeChangeCallback(HandleSizeChange);
|
||||
|
||||
Inputs.TextInput += c =>
|
||||
{
|
||||
if (c == '\t') { return; }
|
||||
io.AddInputCharacter(c);
|
||||
};
|
||||
|
||||
io.ConfigFlags |= ImGuiConfigFlags.NavEnableKeyboard;
|
||||
|
||||
if (!OperatingSystem.IsWindows())
|
||||
{
|
||||
io.SetClipboardTextFn = Clipboard.SetFnPtr;
|
||||
io.GetClipboardTextFn = Clipboard.GetFnPtr;
|
||||
}
|
||||
}
|
||||
|
||||
protected void HandleSizeChange(uint width, uint height)
|
||||
{
|
||||
var io = ImGui.GetIO();
|
||||
io.DisplaySize = new System.Numerics.Vector2(width, height);
|
||||
}
|
||||
|
||||
protected override void Update(System.TimeSpan dt)
|
||||
{
|
||||
var io = ImGui.GetIO();
|
||||
|
||||
io.MousePos = new System.Numerics.Vector2(Inputs.Mouse.X, Inputs.Mouse.Y);
|
||||
io.MouseDown[0] = Inputs.Mouse.LeftButton.IsDown;
|
||||
io.MouseDown[1] = Inputs.Mouse.RightButton.IsDown;
|
||||
io.MouseDown[2] = Inputs.Mouse.MiddleButton.IsDown;
|
||||
io.MouseWheel = Inputs.Mouse.Wheel;
|
||||
|
||||
io.AddKeyEvent(ImGuiKey.A, Inputs.Keyboard.IsDown(KeyCode.A));
|
||||
io.AddKeyEvent(ImGuiKey.Z, Inputs.Keyboard.IsDown(KeyCode.Z));
|
||||
io.AddKeyEvent(ImGuiKey.Y, Inputs.Keyboard.IsDown(KeyCode.Y));
|
||||
io.AddKeyEvent(ImGuiKey.X, Inputs.Keyboard.IsDown(KeyCode.X));
|
||||
io.AddKeyEvent(ImGuiKey.C, Inputs.Keyboard.IsDown(KeyCode.C));
|
||||
io.AddKeyEvent(ImGuiKey.V, Inputs.Keyboard.IsDown(KeyCode.V));
|
||||
|
||||
io.AddKeyEvent(ImGuiKey.Tab, Inputs.Keyboard.IsDown(KeyCode.Tab));
|
||||
io.AddKeyEvent(ImGuiKey.LeftArrow, Inputs.Keyboard.IsDown(KeyCode.Left));
|
||||
io.AddKeyEvent(ImGuiKey.RightArrow, Inputs.Keyboard.IsDown(KeyCode.Right));
|
||||
io.AddKeyEvent(ImGuiKey.UpArrow, Inputs.Keyboard.IsDown(KeyCode.Up));
|
||||
io.AddKeyEvent(ImGuiKey.DownArrow, Inputs.Keyboard.IsDown(KeyCode.Down));
|
||||
io.AddKeyEvent(ImGuiKey.Enter, Inputs.Keyboard.IsDown(KeyCode.Return));
|
||||
io.AddKeyEvent(ImGuiKey.Escape, Inputs.Keyboard.IsDown(KeyCode.Escape));
|
||||
io.AddKeyEvent(ImGuiKey.Delete, Inputs.Keyboard.IsDown(KeyCode.Delete));
|
||||
io.AddKeyEvent(ImGuiKey.Backspace, Inputs.Keyboard.IsDown(KeyCode.Backspace));
|
||||
io.AddKeyEvent(ImGuiKey.Home, Inputs.Keyboard.IsDown(KeyCode.Home));
|
||||
io.AddKeyEvent(ImGuiKey.End, Inputs.Keyboard.IsDown(KeyCode.End));
|
||||
io.AddKeyEvent(ImGuiKey.PageDown, Inputs.Keyboard.IsDown(KeyCode.PageDown));
|
||||
io.AddKeyEvent(ImGuiKey.PageUp, Inputs.Keyboard.IsDown(KeyCode.PageUp));
|
||||
io.AddKeyEvent(ImGuiKey.Insert, Inputs.Keyboard.IsDown(KeyCode.Insert));
|
||||
|
||||
io.AddKeyEvent(ImGuiKey.ModCtrl, Inputs.Keyboard.IsDown(KeyCode.LeftControl) || Inputs.Keyboard.IsDown(KeyCode.RightControl));
|
||||
io.AddKeyEvent(ImGuiKey.ModShift, Inputs.Keyboard.IsDown(KeyCode.LeftShift) || Inputs.Keyboard.IsDown(KeyCode.RightShift));
|
||||
io.AddKeyEvent(ImGuiKey.ModAlt, Inputs.Keyboard.IsDown(KeyCode.LeftAlt) || Inputs.Keyboard.IsDown(KeyCode.RightAlt));
|
||||
io.AddKeyEvent(ImGuiKey.ModSuper, Inputs.Keyboard.IsDown(KeyCode.LeftMeta) || Inputs.Keyboard.IsDown(KeyCode.RightMeta));
|
||||
|
||||
ImGui.NewFrame();
|
||||
|
||||
ImGuiCommands();
|
||||
|
||||
ImGui.EndFrame();
|
||||
}
|
||||
|
||||
protected void ImGuiCommands()
|
||||
{
|
||||
// Do your ImGui commands here!
|
||||
ImGui.ShowDemoWindow();
|
||||
}
|
||||
|
||||
protected override void Draw(double alpha)
|
||||
{
|
||||
ImGui.Render();
|
||||
|
||||
var io = ImGui.GetIO();
|
||||
var drawDataPtr = ImGui.GetDrawData();
|
||||
|
||||
UpdateImGuiBuffers(drawDataPtr);
|
||||
|
||||
var commandBuffer = GraphicsDevice.AcquireCommandBuffer();
|
||||
var swapchainTexture = commandBuffer.AcquireSwapchainTexture(MainWindow);
|
||||
|
||||
if (swapchainTexture != null)
|
||||
{
|
||||
RenderCommandLists(commandBuffer, swapchainTexture, drawDataPtr, io);
|
||||
}
|
||||
|
||||
GraphicsDevice.Submit(commandBuffer);
|
||||
}
|
||||
|
||||
protected override void Destroy()
|
||||
{
|
||||
|
||||
}
|
||||
|
||||
private unsafe void UpdateImGuiBuffers(ImDrawDataPtr drawDataPtr)
|
||||
{
|
||||
if (drawDataPtr.TotalVtxCount == 0) { return; }
|
||||
|
||||
var commandBuffer = GraphicsDevice.AcquireCommandBuffer();
|
||||
|
||||
if (drawDataPtr.TotalVtxCount > VertexCount)
|
||||
{
|
||||
ImGuiVertexBuffer?.Dispose();
|
||||
|
||||
VertexCount = (uint)(drawDataPtr.TotalVtxCount * 1.5f);
|
||||
ImGuiVertexBuffer = MoonWorks.Graphics.Buffer.Create<Position2DTextureColorVertex>(
|
||||
GraphicsDevice,
|
||||
BufferUsageFlags.Vertex,
|
||||
VertexCount
|
||||
);
|
||||
}
|
||||
|
||||
if (drawDataPtr.TotalIdxCount > IndexCount)
|
||||
{
|
||||
ImGuiIndexBuffer?.Dispose();
|
||||
|
||||
IndexCount = (uint)(drawDataPtr.TotalIdxCount * 1.5f);
|
||||
ImGuiIndexBuffer = MoonWorks.Graphics.Buffer.Create<ushort>(
|
||||
GraphicsDevice,
|
||||
BufferUsageFlags.Index,
|
||||
IndexCount
|
||||
);
|
||||
}
|
||||
|
||||
uint vertexOffset = 0;
|
||||
uint indexOffset = 0;
|
||||
|
||||
for (var n = 0; n < drawDataPtr.CmdListsCount; n += 1)
|
||||
{
|
||||
var cmdList = drawDataPtr.CmdLists[n];
|
||||
|
||||
commandBuffer.SetBufferData<Position2DTextureColorVertex>(
|
||||
ImGuiVertexBuffer,
|
||||
cmdList.VtxBuffer.Data,
|
||||
vertexOffset,
|
||||
(uint)cmdList.VtxBuffer.Size
|
||||
);
|
||||
|
||||
commandBuffer.SetBufferData<ushort>(
|
||||
ImGuiIndexBuffer,
|
||||
cmdList.IdxBuffer.Data,
|
||||
indexOffset,
|
||||
(uint)cmdList.IdxBuffer.Size
|
||||
);
|
||||
|
||||
vertexOffset += (uint)cmdList.VtxBuffer.Size;
|
||||
indexOffset += (uint)cmdList.IdxBuffer.Size;
|
||||
}
|
||||
|
||||
GraphicsDevice.Submit(commandBuffer);
|
||||
}
|
||||
|
||||
private void RenderCommandLists(CommandBuffer commandBuffer, Texture renderTexture, ImDrawDataPtr drawDataPtr, ImGuiIOPtr ioPtr)
|
||||
{
|
||||
var view = Matrix4x4.CreateLookAt(
|
||||
new Vector3(0, 0, 1),
|
||||
Vector3.Zero,
|
||||
Vector3.Up
|
||||
);
|
||||
|
||||
var projection = Matrix4x4.CreateOrthographicOffCenter(
|
||||
0,
|
||||
480,
|
||||
270,
|
||||
0,
|
||||
0.01f,
|
||||
4000f
|
||||
);
|
||||
|
||||
var viewProjectionMatrix = view * projection;
|
||||
|
||||
commandBuffer.BeginRenderPass(
|
||||
new ColorAttachmentInfo(renderTexture, MoonWorks.Graphics.Color.CornflowerBlue)
|
||||
);
|
||||
|
||||
commandBuffer.BindGraphicsPipeline(ImGuiPipeline);
|
||||
|
||||
var vertexUniformOffset = commandBuffer.PushVertexShaderUniforms(
|
||||
Matrix4x4.CreateOrthographicOffCenter(0, ioPtr.DisplaySize.X, ioPtr.DisplaySize.Y, 0, -1, 1)
|
||||
);
|
||||
|
||||
commandBuffer.BindVertexBuffers(ImGuiVertexBuffer);
|
||||
commandBuffer.BindIndexBuffer(ImGuiIndexBuffer, IndexElementSize.Sixteen);
|
||||
|
||||
uint vertexOffset = 0;
|
||||
uint indexOffset = 0;
|
||||
|
||||
for (int n = 0; n < drawDataPtr.CmdListsCount; n += 1)
|
||||
{
|
||||
var cmdList = drawDataPtr.CmdLists[n];
|
||||
|
||||
for (int cmdIndex = 0; cmdIndex < cmdList.CmdBuffer.Size; cmdIndex += 1)
|
||||
{
|
||||
var drawCmd = cmdList.CmdBuffer[cmdIndex];
|
||||
|
||||
commandBuffer.BindFragmentSamplers(
|
||||
new TextureSamplerBinding(TextureStorage.GetTexture(drawCmd.TextureId), ImGuiSampler)
|
||||
);
|
||||
|
||||
var topLeft = Vector2.Transform(new Vector2(drawCmd.ClipRect.X, drawCmd.ClipRect.Y), viewProjectionMatrix);
|
||||
var bottomRight = Vector2.Transform(new Vector2(drawCmd.ClipRect.Z, drawCmd.ClipRect.W), viewProjectionMatrix);
|
||||
|
||||
var width = drawCmd.ClipRect.Z - (int)drawCmd.ClipRect.X;
|
||||
var height = drawCmd.ClipRect.W - (int)drawCmd.ClipRect.Y;
|
||||
|
||||
if (width <= 0 || height <= 0)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
|
||||
commandBuffer.SetScissor(
|
||||
new Rect(
|
||||
(int)drawCmd.ClipRect.X,
|
||||
(int)drawCmd.ClipRect.Y,
|
||||
(int)width,
|
||||
(int)height
|
||||
)
|
||||
);
|
||||
|
||||
commandBuffer.DrawIndexedPrimitives(
|
||||
vertexOffset,
|
||||
indexOffset,
|
||||
drawCmd.ElemCount / 3,
|
||||
vertexUniformOffset,
|
||||
0
|
||||
);
|
||||
|
||||
indexOffset += drawCmd.ElemCount;
|
||||
}
|
||||
|
||||
vertexOffset += (uint)cmdList.VtxBuffer.Size;
|
||||
}
|
||||
|
||||
commandBuffer.EndRenderPass();
|
||||
}
|
||||
|
||||
private void BuildFontAtlas()
|
||||
{
|
||||
var commandBuffer = GraphicsDevice.AcquireCommandBuffer();
|
||||
|
||||
var io = ImGui.GetIO();
|
||||
|
||||
io.Fonts.GetTexDataAsRGBA32(
|
||||
out System.IntPtr pixelData,
|
||||
out int width,
|
||||
out int height,
|
||||
out int bytesPerPixel
|
||||
);
|
||||
|
||||
var fontTexture = Texture.CreateTexture2D(
|
||||
GraphicsDevice,
|
||||
(uint)width,
|
||||
(uint)height,
|
||||
TextureFormat.R8G8B8A8,
|
||||
TextureUsageFlags.Sampler
|
||||
);
|
||||
|
||||
commandBuffer.SetTextureData(fontTexture, pixelData, (uint)(width * height * bytesPerPixel));
|
||||
|
||||
GraphicsDevice.Submit(commandBuffer);
|
||||
|
||||
io.Fonts.SetTexID(fontTexture.Handle);
|
||||
io.Fonts.ClearTexData();
|
||||
|
||||
TextureStorage.Add(fontTexture);
|
||||
}
|
||||
}
|
||||
private readonly ImGuiController imGuiController;
|
||||
|
||||
public MoonWorksDearImGuiScaffoldGame(
|
||||
WindowCreateInfo windowCreateInfo,
|
||||
FrameLimiterSettings frameLimiterSettings,
|
||||
bool debugMode
|
||||
) : base(windowCreateInfo, frameLimiterSettings, 60, debugMode)
|
||||
{
|
||||
// Render the mouse in software with ImGui.
|
||||
Inputs.Mouse.Hidden = true;
|
||||
imGuiController = new ImGuiController(GraphicsDevice, MainWindow, Inputs, Color.CornflowerBlue);
|
||||
imGuiController.OnGui += ImGui.ShowDemoWindow;
|
||||
}
|
||||
|
||||
protected override void Update(System.TimeSpan dt)
|
||||
{
|
||||
imGuiController.Update((float)dt.TotalSeconds);
|
||||
}
|
||||
|
||||
protected override void Draw(double alpha)
|
||||
{
|
||||
imGuiController.Render();
|
||||
}
|
||||
|
||||
protected override void Destroy()
|
||||
{
|
||||
imGuiController?.Dispose();
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user