wip

src/Browser/Avalonia.Browser/BrowserTopLevelImpl.cs

@@ -61,9 +61,7 @@ namespace Avalonia.Browser
             _surface.ScalingChanged += OnScalingChanged;
 
             Surfaces = new[] { _surface };
-            Compositor = _surface.IsWebGl ?
-                BrowserCompositor.WebGlUiCompositor :
-                BrowserCompositor.SoftwareUiCompositor;
+            Compositor = _surface.Compositor;
         }
 
         private void OnScalingChanged()

src/Browser/Avalonia.Browser/Rendering/BrowserGlSurface.cs

@@ -3,6 +3,7 @@ using System.Runtime.InteropServices.JavaScript;
 using Avalonia.Browser.Interop;
 using Avalonia.Browser.Skia;
 using Avalonia.Platform;
+using Avalonia.Rendering.Composition;
 using SkiaSharp;
 
 namespace Avalonia.Browser.Rendering;
@@ -12,8 +13,8 @@ internal sealed class BrowserGlSurface : BrowserSurface
     private readonly GRGlInterface _glInterface;
 
     public BrowserGlSurface(JSObject canvasSurface, GLInfo glInfo, PixelFormat pixelFormat,
-        BrowserRenderingMode renderingMode)
-        : base(canvasSurface, renderingMode)
+        Compositor compositor)
+        : base(canvasSurface, compositor)
     {
         var skiaOptions = AvaloniaLocator.Current.GetService<SkiaOptions>();
         _glInterface = GRGlInterface.Create() ?? throw new InvalidOperationException("Unable to create GRGlInterface.");

src/Browser/Avalonia.Browser/Rendering/BrowserRasterSurface.cs

@@ -5,6 +5,7 @@ using System.Runtime.InteropServices.JavaScript;
 using Avalonia.Browser.Interop;
 using Avalonia.Controls.Platform.Surfaces;
 using Avalonia.Platform;
+using Avalonia.Rendering.Composition;
 
 namespace Avalonia.Browser.Skia;
 
@@ -16,8 +17,8 @@ internal sealed class BrowserRasterSurface : BrowserSurface, IFramebufferPlatfor
     private readonly Action _onDisposeAction;
     private readonly int _bytesPerPixel;
 
-    public BrowserRasterSurface(JSObject canvasSurface, PixelFormat pixelFormat, BrowserRenderingMode renderingMode)
-        : base(canvasSurface, renderingMode)
+    public BrowserRasterSurface(JSObject canvasSurface, PixelFormat pixelFormat, Compositor compositor)
+        : base(canvasSurface, compositor)
     {
         PixelFormat = pixelFormat;
         _onDisposeAction = Blit;

src/Browser/Avalonia.Browser/Rendering/BrowserSurface.cs

@@ -9,25 +9,24 @@ using Avalonia.Browser.Rendering;
 using Avalonia.Logging;
 using Avalonia.Platform;
 using Avalonia.Rendering;
+using Avalonia.Rendering.Composition;
 using Avalonia.Threading;
 
 namespace Avalonia.Browser.Skia;
 
 internal abstract class BrowserSurface : IDisposable
 {
-    private readonly BrowserRenderingMode _renderingMode;
-
-    protected BrowserSurface(JSObject jsSurface, BrowserRenderingMode renderingMode)
+    protected BrowserSurface(JSObject jsSurface, Compositor compositor)
     {
-        _renderingMode = renderingMode;
         JsSurface = jsSurface;
 
+        Compositor = compositor;
         Scaling = 1;
         ClientSize = new Size(1, 1);
         RenderSize = new PixelSize(1, 1);
     }
 
-    public bool IsWebGl => _renderingMode is BrowserRenderingMode.WebGL1 or BrowserRenderingMode.WebGL2;
+    public Compositor Compositor { get; }
 
     public JSObject JsSurface { get; private set; }
     public double Scaling { get; private set; }
@@ -55,8 +54,8 @@ internal abstract class BrowserSurface : IDisposable
             {
                 var (jsSurface, jsGlInfo) = CanvasHelper.CreateSurface(container, mode);
                 surface = jsGlInfo != null
-                    ? new BrowserGlSurface(jsSurface, jsGlInfo, pixelFormat, mode)
-                    : new BrowserRasterSurface(jsSurface, pixelFormat, mode);
+                    ? new BrowserGlSurface(jsSurface, jsGlInfo, pixelFormat, BrowserCompositor.WebGlUiCompositor)
+                    : new BrowserRasterSurface(jsSurface, pixelFormat, BrowserCompositor.SoftwareUiCompositor);
                 break;
             }
             catch (Exception ex)

src/Browser/Avalonia.Browser/Rendering/RenderTargetBrowserSurface.cs

@@ -0,0 +1,12 @@
+using System.Runtime.InteropServices.JavaScript;
+using Avalonia.Browser.Skia;
+using Avalonia.Rendering.Composition;
+
+namespace Avalonia.Browser.Rendering;
+
+internal class RenderTargetBrowserSurface : BrowserSurface
+{
+    public RenderTargetBrowserSurface(JSObject jsSurface, Compositor compositor) : base(jsSurface, compositor)
+    {
+    }
+}