Win32

samples/ControlCatalog.NetCore/Program.cs

@@ -115,7 +115,8 @@ namespace ControlCatalog.NetCore
                 })
                 .With(new Win32PlatformOptions
                 {
-                    EnableMultitouch = true
+                    EnableMultitouch = true,
+                    UseCompositor = true
                 })
                 .UseSkia()
                 .AfterSetup(builder =>

src/Avalonia.Base/Rendering/Composition/CompositingRenderer.cs

@@ -177,7 +177,7 @@ public class CompositingRenderer : RendererBase, IRendererWithCompositor
 
     public void Stop()
     {
-        _target.IsEnabled = true;
+        _target.IsEnabled = false;
     }
     
     public void Dispose()
@@ -191,4 +191,4 @@ public class CompositingRenderer : RendererBase, IRendererWithCompositor
 
 
     public Compositor Compositor => _compositor;
-}
+}

src/Windows/Avalonia.Win32/Win32Platform.cs

@@ -14,6 +14,7 @@ using Avalonia.Input.Platform;
 using Avalonia.OpenGL;
 using Avalonia.Platform;
 using Avalonia.Rendering;
+using Avalonia.Rendering.Composition;
 using Avalonia.Threading;
 using Avalonia.Utilities;
 using Avalonia.Win32.Input;
@@ -48,6 +49,8 @@ namespace Avalonia
         /// Immediate re-renders the whole scene when some element is changed on the scene. Deferred re-renders only changed elements.
         /// </remarks>
         public bool UseDeferredRendering { get; set; } = true;
+        
+        public bool UseCompositor { get; set; }
 
         /// <summary>
         /// Enables ANGLE for Windows. For every Windows version that is above Windows 7, the default is true otherwise it's false.
@@ -132,6 +135,8 @@ namespace Avalonia.Win32
         public static bool UseDeferredRendering => Options.UseDeferredRendering;
         internal static bool UseOverlayPopups => Options.OverlayPopups;
         public static Win32PlatformOptions Options { get; private set; }
+        
+        internal static Compositor Compositor { get; private set; }
 
         public Size DoubleClickSize => new Size(
             UnmanagedMethods.GetSystemMetrics(UnmanagedMethods.SystemMetric.SM_CXDOUBLECLK),
@@ -181,6 +186,9 @@ namespace Avalonia.Win32
 
             if (OleContext.Current != null)
                 AvaloniaLocator.CurrentMutable.Bind<IPlatformDragSource>().ToSingleton<DragSource>();
+            
+            if (Options.UseCompositor)
+                Compositor = Compositor.Create(AvaloniaLocator.Current.GetRequiredService<IRenderLoop>());
         }
 
         public bool HasMessages()

src/Windows/Avalonia.Win32/WindowImpl.cs

@@ -14,6 +14,7 @@ using Avalonia.OpenGL.Egl;
 using Avalonia.OpenGL.Surfaces;
 using Avalonia.Platform;
 using Avalonia.Rendering;
+using Avalonia.Rendering.Composition;
 using Avalonia.Win32.Automation;
 using Avalonia.Win32.Input;
 using Avalonia.Win32.Interop;
@@ -500,6 +501,9 @@ namespace Avalonia.Win32
             if (customRendererFactory != null)
                 return customRendererFactory.Create(root, loop);
 
+            if (Win32Platform.Compositor != null)
+                return new CompositingRenderer(root, Win32Platform.Compositor);
+            
             return Win32Platform.UseDeferredRendering
                 ? _isUsingComposition
                     ? new DeferredRenderer(root, loop)