ImGui.NET_OpenTK_Sample/Dear ImGui Sample/Window.cs at opentk4.0 · NogginBops/ImGui.NET_OpenTK_Sample · GitHub

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using Dear_ImGui_Sample.Backends;
using ImGuiNET;
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL4;
using OpenTK.Mathematics;
using OpenTK.Windowing.Common;
using OpenTK.Windowing.Desktop;
using OpenTK.Windowing.GraphicsLibraryFramework;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace Dear_ImGui_Sample
{
    public class Window : GameWindow
    {
        public Window() : base(GameWindowSettings.Default, new NativeWindowSettings(){ ClientSize = new Vector2i(1600, 900), APIVersion = new Version(3, 3) })
        { }

        protected override void OnLoad()
        {
            base.OnLoad();

            Title += ": OpenGL Version: " + GL.GetString(StringName.Version);

            GL.DebugMessageCallback(DebugProcCallback, IntPtr.Zero);
            GL.Enable(EnableCap.DebugOutput);
            GL.Enable(EnableCap.DebugOutputSynchronous);

            ImGui.CreateContext();
            ImGuiIOPtr io = ImGui.GetIO();
            io.ConfigFlags |= ImGuiConfigFlags.NavEnableKeyboard;
            io.ConfigFlags |= ImGuiConfigFlags.NavEnableGamepad;
            io.ConfigFlags |= ImGuiConfigFlags.DockingEnable;
            io.ConfigFlags |= ImGuiConfigFlags.ViewportsEnable;

            ImGui.StyleColorsDark();

            ImGuiStylePtr style = ImGui.GetStyle();
            if ((io.ConfigFlags & ImGuiConfigFlags.ViewportsEnable) != 0)
            {
                style.WindowRounding = 0.0f;
                style.Colors[(int)ImGuiCol.WindowBg].W = 1.0f;
            }

            ImguiImplOpenTK4.Init(this);
            ImguiImplOpenGL3.Init();
        }

        protected override void OnRenderFrame(FrameEventArgs e)
        {
            base.OnRenderFrame(e);

            ImguiImplOpenGL3.NewFrame();
            ImguiImplOpenTK4.NewFrame();
            ImGui.NewFrame();

            ImGui.DockSpaceOverViewport();

            ImGui.ShowDemoWindow();

            ImGui.Render();
            GL.Viewport(0, 0, FramebufferSize.X, FramebufferSize.Y);
            GL.ClearColor(new Color4(0, 32, 48, 255));
            GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit | ClearBufferMask.StencilBufferBit);
            ImguiImplOpenGL3.RenderDrawData(ImGui.GetDrawData());

            if (ImGui.GetIO().ConfigFlags.HasFlag(ImGuiConfigFlags.ViewportsEnable))
            {
                ImGui.UpdatePlatformWindows();
                ImGui.RenderPlatformWindowsDefault();
                Context.MakeCurrent();
            }

            SwapBuffers();
        }

        public void OnClosed()
        {
            ImguiImplOpenGL3.Shutdown();
            ImguiImplOpenTK4.Shutdown();
        }

        public readonly static DebugProc DebugProcCallback = Window_DebugProc;
        private static void Window_DebugProc(DebugSource source, DebugType type, int id, DebugSeverity severity, int length, IntPtr messagePtr, IntPtr userParam)
        {
            string message = Marshal.PtrToStringAnsi(messagePtr, length);

            bool showMessage = true;

            switch (source)
            {
                case DebugSource.DebugSourceApplication:
                    showMessage = false;
                    break;
                case DebugSource.DontCare:
                case DebugSource.DebugSourceApi:
                case DebugSource.DebugSourceWindowSystem:
                case DebugSource.DebugSourceShaderCompiler:
                case DebugSource.DebugSourceThirdParty:
                case DebugSource.DebugSourceOther:
                default:
                    showMessage = true;
                    break;
            }

            if (showMessage)
            {
                switch (severity)
                {
                    case DebugSeverity.DontCare:
                        Console.WriteLine($"[DontCare] [{source}] {message}");
                        break;
                    case DebugSeverity.DebugSeverityNotification:
                        //Logger?.LogDebug($"[{source}] {message}");
                        break;
                    case DebugSeverity.DebugSeverityHigh:
                        Console.Error.WriteLine($"Error: [{source}] {message}");
                        break;
                    case DebugSeverity.DebugSeverityMedium:
                        Console.WriteLine($"Warning: [{source}] {message}");
                        break;
                    case DebugSeverity.DebugSeverityLow:
                        Console.WriteLine($"Info: [{source}] {message}");
                        break;
                    default:
                        Console.WriteLine($"[default] [{source}] {message}");
                        break;
                }
            }
        }
    }
}