feat: CameraView micro-optimization

Do not call render if CameraView is not visible

GSS2.UI.Core/Views/CameraView.axaml.cs

@@ -15,6 +15,7 @@ using Avalonia.Input;
 using GSS2.UI.Core.ViewModels;
 using Avalonia.Markup.Xaml;
 using GSS2.Core.UI.Extensions;
+using Avalonia.VisualTree;
 
 namespace GSS2.UI.Core.Views;
 
@@ -427,7 +428,19 @@ public partial class CameraView : OpenGlControlBase
         context.FillRectangle(new SolidColorBrush(Background), new Rect(0, 0, Bounds.Width, Bounds.Height));
         base.Render(context);
     }
-    private void RenderRequested(object? sender, EventArgs ea) => Dispatcher.UIThread.Invoke(() => RequestNextFrameRendering());
+    private void RenderRequested(object? sender, EventArgs ea)
+    {
+        Dispatcher.UIThread.Invoke(() =>
+        {
+            var transformBounds = this.GetTransformedBounds();
+            if (transformBounds is not null &&
+                (transformBounds.Value.Clip.Bottom != 0 ||
+                transformBounds.Value.Clip.Top != 0 ||
+                transformBounds.Value.Clip.Left != 0 ||
+                transformBounds.Value.Clip.Right != 0))
+                RequestNextFrameRendering();
+        });
+    }
 
     protected override void OnOpenGlInit(GlInterface gl)
     {