Overlays: Move the structure to Ryujinx/UI/Overlay (also no longer need to cross-pass locales)

src/Ryujinx.Graphics.Gpu/IOverlay.cs

@@ -0,0 +1,54 @@
+using SkiaSharp;
+using System;
+
+namespace Ryujinx.Graphics.Gpu
+{
+    /// <summary>
+    /// Interface for overlay functionality
+    /// </summary>
+    public interface IOverlay : IDisposable
+    {
+        /// <summary>
+        /// Name of the overlay
+        /// </summary>
+        string Name { get; set; }
+
+        /// <summary>
+        /// Whether the overlay is visible
+        /// </summary>
+        bool IsVisible { get; set; }
+
+        /// <summary>
+        /// Opacity of the overlay (0.0 to 1.0)
+        /// </summary>
+        float Opacity { get; set; }
+
+        /// <summary>
+        /// X position of the overlay
+        /// </summary>
+        float X { get; set; }
+
+        /// <summary>
+        /// Y position of the overlay
+        /// </summary>
+        float Y { get; set; }
+
+        /// <summary>
+        /// Z-index for overlay ordering
+        /// </summary>
+        int ZIndex { get; set; }
+
+        /// <summary>
+        /// Update overlay (for animations)
+        /// </summary>
+        /// <param name="deltaTime">Time elapsed since last update</param>
+        /// <param name="screenSize">Current screen size</param>
+        void Update(float deltaTime, SKSize screenSize = default);
+
+        /// <summary>
+        /// Render this overlay
+        /// </summary>
+        /// <param name="canvas">The canvas to render to</param>
+        void Render(SKCanvas canvas);
+    }
+}