Add text path conversion

samples/svgc/ImageSharpAssetLoader.cs

@@ -56,4 +56,9 @@ public float MeasureText(string? text, ShimSkiaSharp.SKPaint paint, ref ShimSkia
         bounds = new ShimSkiaSharp.SKRect(0, -size * 0.8f, width, size * 0.2f);
         return width;
     }
+
+    public ShimSkiaSharp.SKPath? GetTextPath(string? text, ShimSkiaSharp.SKPaint paint, float x, float y)
+    {
+        return null;
+    }
 }

src/Svg.Controls.Avalonia/AvaloniaSvgAssetLoader.cs

@@ -173,4 +173,10 @@ public float MeasureText(string? text, SKPaint paint, ref SKRect bounds)
         bounds = new SKRect(0, -ascent, width, descent);
         return width;
     }
+
+    /// <inheritdoc />
+    public SKPath? GetTextPath(string? text, SKPaint paint, float x, float y)
+    {
+        return null;
+    }
 }

src/Svg.Model/Drawables/Elements/TextDrawable.cs

@@ -18,6 +18,8 @@ public sealed class TextDrawable : DrawableBase
 
     public SKRect OwnerBounds { get; set; }
 
+    public SKPath? Path { get; private set; }
+
     private TextDrawable(ISvgAssetLoader assetLoader, HashSet<Uri>? references)
         : base(assetLoader, references)
     {
@@ -87,6 +89,7 @@ private void Initialize()
         var width = AssetLoader.MeasureText(text, paint, ref bounds);
 
         GeometryBounds = new SKRect(x, y + metricsAscent, x + width, y + metricsDescent);
+        Path = AssetLoader.GetTextPath(text, paint, x, y);
         Transform = TransformsService.ToMatrix(Text.Transforms);
     }
 

src/Svg.Model/ISvgAssetLoader.cs

@@ -14,4 +14,5 @@ public interface ISvgAssetLoader
     List<TypefaceSpan> FindTypefaces(string? text, SKPaint paintPreferredTypeface);
     SKFontMetrics GetFontMetrics(SKPaint paint);
     float MeasureText(string? text, SKPaint paint, ref SKRect bounds);
+    SKPath? GetTextPath(string? text, SKPaint paint, float x, float y);
 }

src/Svg.Skia/SkiaModel.cs

@@ -915,7 +915,7 @@
         };
     }
 
     public SkiaSharp.SKFilterQuality ToSKFilterQuality(SKFilterQuality filterQuality)
     {
         return filterQuality switch
         {
@@ -994,6 +994,15 @@
         };
     }
 
+    public SKPathFillType FromSKPathFillType(SkiaSharp.SKPathFillType pathFillType)
+    {
+        return pathFillType switch
+        {
+            SkiaSharp.SKPathFillType.EvenOdd => SKPathFillType.EvenOdd,
+            _ => SKPathFillType.Winding
+        };
+    }
+
     public SkiaSharp.SKPathArcSize ToSKPathArcSize(SKPathArcSize pathArcSize)
     {
         return pathArcSize switch
@@ -1130,6 +1139,42 @@
         return skPath;
     }
 
+    public SKPath FromSKPath(SkiaSharp.SKPath skPath)
+    {
+        var path = new SKPath
+        {
+            FillType = FromSKPathFillType(skPath.FillType)
+        };
+
+        using var iter = skPath.CreateRawIterator();
+        var pts = new SkiaSharp.SKPoint[4];
+        while (true)
+        {
+            var verb = iter.Next(pts);
+            switch (verb)
+            {
+                case SkiaSharp.SKPathVerb.Move:
+                    path.Commands?.Add(new MoveToPathCommand(pts[0].X, pts[0].Y));
+                    break;
+                case SkiaSharp.SKPathVerb.Line:
+                    path.Commands?.Add(new LineToPathCommand(pts[1].X, pts[1].Y));
+                    break;
+                case SkiaSharp.SKPathVerb.Quad:
+                case SkiaSharp.SKPathVerb.Conic:
+                    path.Commands?.Add(new QuadToPathCommand(pts[1].X, pts[1].Y, pts[2].X, pts[2].Y));
+                    break;
+                case SkiaSharp.SKPathVerb.Cubic:
+                    path.Commands?.Add(new CubicToPathCommand(pts[1].X, pts[1].Y, pts[2].X, pts[2].Y, pts[3].X, pts[3].Y));
+                    break;
+                case SkiaSharp.SKPathVerb.Close:
+                    path.Commands?.Add(new ClosePathCommand());
+                    break;
+                case SkiaSharp.SKPathVerb.Done:
+                    return path;
+            }
+        }
+    }
+
     public SkiaSharp.SKPath? ToSKPath(ClipPath? clipPath)
     {
         if (clipPath?.Clips is null)

src/Svg.Skia/SkiaSvgAssetLoader.cs

@@ -72,16 +72,16 @@
         {
             var currentTypefaceText = text.Substring(currentTypefaceStartIndex, i - currentTypefaceStartIndex);
 
             ret.Add(new(currentTypefaceText, runningPaint.MeasureText(currentTypefaceText),
                 runningPaint.Typeface is null
                     ? null
                     : ShimSkiaSharp.SKTypeface.FromFamilyName(
                         runningPaint.Typeface.FamilyName,
                         // SkiaSharp provides int properties here. Let's just assume our
                         // ShimSkiaSharp defines the same values as SkiaSharp and convert directly
                         (ShimSkiaSharp.SKFontStyleWeight)runningPaint.Typeface.FontWeight,
                         (ShimSkiaSharp.SKFontStyleWidth)runningPaint.Typeface.FontWidth,
                         (ShimSkiaSharp.SKFontStyleSlant)runningPaint.Typeface.FontSlant)
             ));
         }
 
@@ -91,10 +91,10 @@
 
             if (i == 0)
             {
                 runningPaint.Typeface = typeface;
             }
             else if (runningPaint.Typeface is null
                      && typeface is { } || runningPaint.Typeface is { }
                      && typeface is null || runningPaint.Typeface is { } l
                      && typeface is { } r
                      && (l.FamilyName, l.FontWeight, l.FontWidth, l.FontSlant) != (r.FamilyName, r.FontWeight, r.FontWidth, r.FontSlant))
@@ -151,4 +151,17 @@
         bounds = new ShimSkiaSharp.SKRect(skBounds.Left, skBounds.Top, skBounds.Right, skBounds.Bottom);
         return width;
     }
+
+    /// <inheritdoc />
+    public ShimSkiaSharp.SKPath? GetTextPath(string? text, ShimSkiaSharp.SKPaint paint, float x, float y)
+    {
+        using var skPaint = _skiaModel.ToSKPaint(paint);
+        if (skPaint is null || text is null)
+        {
+            return null;
+        }
+
+        using var skPath = skPaint.GetTextPath(text, x, y);
+        return _skiaModel.FromSKPath(skPath);
+    }
 }

src/Svg.SourceGenerator.Skia/SkiaGeneratorSvgAssetLoader.cs

@@ -57,4 +57,9 @@ public float MeasureText(string? text, ShimSkiaSharp.SKPaint paint, ref ShimSkia
         bounds = new ShimSkiaSharp.SKRect(0, -size * 0.8f, width, size * 0.2f);
         return width;
     }
+
+    public ShimSkiaSharp.SKPath? GetTextPath(string? text, ShimSkiaSharp.SKPaint paint, float x, float y)
+    {
+        return null;
+    }
 }