Overlay system

src/Ryujinx.Graphics.Gpu/Overlay/TextElement.cs

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+using SkiaSharp;
+
+namespace Ryujinx.Graphics.Gpu.Overlay
+{
+    /// <summary>
+    /// Text overlay element
+    /// </summary>
+    public class TextElement : OverlayElement
+    {
+        public string Text { get; set; } = string.Empty;
+        public SKColor TextColor { get; set; } = SKColors.White;
+        public float FontSize { get; set; } = 16;
+        public string FontFamily { get; set; } = "Arial";
+        public SKFontStyle FontStyle { get; set; } = SKFontStyle.Normal;
+        public SKTextAlign TextAlign { get; set; } = SKTextAlign.Left;
+        public bool IsAntialias { get; set; } = true;
+
+        // Shadow properties
+        public bool HasShadow { get; set; } = false;
+        public SKColor ShadowColor { get; set; } = SKColors.Black;
+        public float ShadowOffsetX { get; set; } = 1;
+        public float ShadowOffsetY { get; set; } = 1;
+        public float ShadowBlur { get; set; } = 0;
+
+        public TextElement()
+        {
+        }
+
+        public TextElement(float x, float y, string text, float fontSize = 16, SKColor? color = null)
+        {
+            X = x;
+            Y = y;
+            Text = text;
+            FontSize = fontSize;
+            TextColor = color ?? SKColors.White;
+            
+            // Auto-calculate width and height based on text
+            UpdateDimensions();
+        }
+
+        public override void Render(SKCanvas canvas, float globalOpacity = 1.0f)
+        {
+            if (!IsVisible || string.IsNullOrEmpty(Text))
+                return;
+
+            float effectiveOpacity = Opacity * globalOpacity;
+
+            using var typeface = SKTypeface.FromFamilyName(FontFamily, FontStyle);
+            using var paint = new SKPaint
+            {
+                Color = ApplyOpacity(TextColor, effectiveOpacity),
+                TextSize = FontSize,
+                Typeface = typeface,
+                TextAlign = TextAlign,
+                IsAntialias = IsAntialias
+            };
+
+            float textX = X;
+            float textY = Y + FontSize; // Baseline adjustment
+
+            // Adjust X position based on alignment
+            if (TextAlign == SKTextAlign.Center)
+            {
+                textX += Width / 2;
+            }
+            else if (TextAlign == SKTextAlign.Right)
+            {
+                textX += Width;
+            }
+
+            // Draw shadow if enabled
+            if (HasShadow)
+            {
+                using var shadowPaint = new SKPaint
+                {
+                    Color = ApplyOpacity(ShadowColor, effectiveOpacity),
+                    TextSize = FontSize,
+                    Typeface = typeface,
+                    TextAlign = TextAlign,
+                    IsAntialias = IsAntialias
+                };
+
+                if (ShadowBlur > 0)
+                {
+                    shadowPaint.MaskFilter = SKMaskFilter.CreateBlur(SKBlurStyle.Normal, ShadowBlur);
+                }
+
+                canvas.DrawText(Text, textX + ShadowOffsetX, textY + ShadowOffsetY, shadowPaint);
+            }
+
+            // Draw main text
+            canvas.DrawText(Text, textX, textY, paint);
+        }
+
+        /// <summary>
+        /// Update width and height based on current text and font settings
+        /// </summary>
+        public void UpdateDimensions()
+        {
+            if (string.IsNullOrEmpty(Text))
+            {
+                Width = 0;
+                Height = 0;
+                return;
+            }
+
+            using var typeface = SKTypeface.FromFamilyName(FontFamily, FontStyle);
+            using var paint = new SKPaint
+            {
+                TextSize = FontSize,
+                Typeface = typeface
+            };
+
+            var bounds = new SKRect();
+            paint.MeasureText(Text, ref bounds);
+            
+            Width = bounds.Width;
+            Height = FontSize; // Use font size as height for consistency
+        }
+    }
+}