Ava UI: Renderer refactoring (#4297)

* Ava UI: `Renderer` refactoring

* Fix Vulkan CreateSurface

Ryujinx.Ava/UI/Renderer/RendererHost.axaml.cs

@@ -0,0 +1,69 @@
+using Avalonia;
+using Avalonia.Controls;
+using Ryujinx.Common.Configuration;
+using Ryujinx.Ui.Common.Configuration;
+using Silk.NET.Vulkan;
+using System;
+
+namespace Ryujinx.Ava.UI.Renderer
+{
+    public partial class RendererHost : UserControl, IDisposable
+    {
+        public EmbeddedWindow EmbeddedWindow;
+
+        public event EventHandler<EventArgs> WindowCreated;
+        public event Action<object, Size>    SizeChanged;
+
+        public RendererHost()
+        {
+            InitializeComponent();
+
+            Dispose();
+
+            if (ConfigurationState.Instance.Graphics.GraphicsBackend.Value == GraphicsBackend.OpenGl)
+            {
+                EmbeddedWindow = new EmbeddedWindowOpenGL();
+            }
+            else
+            {
+                EmbeddedWindow = new EmbeddedWindowVulkan();
+            }
+
+            Initialize();
+        }
+
+        private void Initialize()
+        {
+            EmbeddedWindow.WindowCreated += CurrentWindow_WindowCreated;
+            EmbeddedWindow.SizeChanged   += CurrentWindow_SizeChanged;
+
+            Content = EmbeddedWindow;
+        }
+
+        public void Dispose()
+        {
+            if (EmbeddedWindow != null)
+            {
+                EmbeddedWindow.WindowCreated -= CurrentWindow_WindowCreated;
+                EmbeddedWindow.SizeChanged   -= CurrentWindow_SizeChanged;
+            }
+        }
+
+        protected override void OnDetachedFromVisualTree(VisualTreeAttachmentEventArgs e)
+        {
+            base.OnDetachedFromVisualTree(e);
+
+            Dispose();
+        }
+
+        private void CurrentWindow_SizeChanged(object sender, Size e)
+        {
+            SizeChanged?.Invoke(sender, e);
+        }
+
+        private void CurrentWindow_WindowCreated(object sender, IntPtr e)
+        {
+            WindowCreated?.Invoke(this, EventArgs.Empty);
+        }
+    }
+}