"resize was laggy if framerate was to high, it was too high, because vsync wasn't working, so no we seep ourselves :)

Author: FlurinBruehwilerCMI

.gitignore

@@ -6,6 +6,7 @@
 **/*.received.cs
 
 Avalonia
+*.trace
 
 # User-specific files
 *.rsuser

Flamui/FlamuiApp.cs

@@ -49,7 +49,7 @@ public void CreateWindow<TRootComponent>(string title, FlamuiWindowOptions? opti
         {
             Size = new Vector2D<int>(options.Width, options.Height),
             Title = title,
-            VSync = true,
+            VSync = false, //for some reason this doesn't work on my laptop, so we just sleep ourselves
             ShouldSwapAutomatically = false
         };
 

Flamui/UiWindow.cs

@@ -92,6 +92,8 @@ private void OnRender(double obj)
         if (!isInitialized)
             return;
 
+        var start = Stopwatch.GetTimestamp();
+
         using var _ = Systrace.BeginEvent(nameof(OnRender));
 
         Render();
@@ -105,6 +107,13 @@ private void OnRender(double obj)
             OldHoveredElements.Add(uiContainer);
         }
         HoveredElements.Clear();
+
+        var end = Stopwatch.GetElapsedTime(start);
+        if (end.TotalMilliseconds < 16) //todo we should probably also detect the refresh rate of monitor, to know how long to sleep for (or we can try to get vsync working)s
+        {
+            // Console.WriteLine($"Sleeping for {end.TotalMilliseconds}");
+            Thread.Sleep(TimeSpan.FromMilliseconds(16 - end.TotalMilliseconds));
+        }
     }
 
     private void OnUpdate(double obj)
@@ -321,6 +330,7 @@ private void RenderToCanvas()
 
         if (!RenderContextAreSame(RenderContext, LastRenderContext))
         {
+            _renderer.Gl.Viewport(Window.Size);
             RenderContext.Rerender(_renderer);
             Window.GLContext.SwapBuffers();
         }
@@ -427,6 +437,8 @@ private void BuildUi()
 
         _rootComponent.Build(Ui);
 
+        Console.WriteLine(Window.Size.X);
+
         RootContainer.PrepareLayout(Dir.Vertical);
         RootContainer.Layout(new BoxConstraint(0, Window.Size.X / GetCompleteScaling().X, 0, Window.Size.Y / GetCompleteScaling().Y));
     }

SilkNetTest/Program.cs

@@ -0,0 +1,57 @@
+using Silk.NET.Input;
+using Silk.NET.Maths;
+using Silk.NET.Windowing;
+using Silk.NET.OpenGL;
+using System.Drawing;
+
+namespace MySilkProgram;
+
+public class Program
+{
+    private static IWindow _window;
+    private static GL _gl;
+
+    public static void Main(string[] args)
+    {
+        WindowOptions options = WindowOptions.Default;
+        options.Size = new Vector2D<int>(800, 600);
+        options.Title = "My first Silk.NET program!";
+        options.VSync = true;
+
+        _window = Window.Create(options);
+
+        _window.Load += OnLoad;
+        _window.Update += OnUpdate;
+        _window.Render += OnRender;
+
+        _window.Run();
+    }
+
+    private static void OnLoad()
+    {
+        Console.WriteLine("Load!");
+
+        IInputContext input = _window.CreateInput();
+        for (int i = 0; i < input.Keyboards.Count; i++)
+            input.Keyboards[i].KeyDown += KeyDown;
+
+        _gl = _window.CreateOpenGL();
+        _gl.ClearColor(Color.CornflowerBlue);
+    }
+
+    // These two methods are unused for this tutorial, aside from the logging we added earlier.
+    private static void OnUpdate(double deltaTime)
+    {
+    }
+
+    private static void OnRender(double deltaTime)
+    {
+        _gl.Clear(ClearBufferMask.ColorBufferBit);
+    }
+
+    private static void KeyDown(IKeyboard keyboard, Key key, int keyCode)
+    {
+        if (key == Key.Escape)
+            _window.Close();
+    }
+}

SilkNetTest/SilkNetTest.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Silk.NET.Input" Version="2.22.0" />
+    <PackageReference Include="Silk.NET.OpenGL" Version="2.22.0" />
+    <PackageReference Include="Silk.NET.Windowing" Version="2.22.0" />
+  </ItemGroup>
+
+</Project>