Reduce ILineSegment[] copies for Path classes

Author: TechPizzaDev

src/ImageSharp.Drawing/Shapes/Path.cs

@@ -101,7 +101,7 @@ public virtual IPath Transform(Matrix3x2 matrix)
 
         ILineSegment[] segments = new ILineSegment[this.lineSegments.Length];
 
-        for (int i = 0; i < this.LineSegments.Count; i++)
+        for (int i = 0; i < segments.Length; i++)
         {
             segments[i] = this.lineSegments[i].Transform(matrix);
         }

src/ImageSharp.Drawing/Shapes/PathBuilder.cs

@@ -465,7 +465,7 @@ private class Figure
 
         public IPath Build()
             => this.IsClosed
-            ? new Polygon(this.segments.ToArray())
+            ? new Polygon(this.segments.ToArray(), true)
             : new Path(this.segments.ToArray());
     }
 }

src/ImageSharp.Drawing/Shapes/Polygon.cs

@@ -24,7 +24,7 @@ public Polygon(PointF[] points)
     /// </summary>
     /// <param name="segments">The segments.</param>
     public Polygon(params ILineSegment[] segments)
-        : base((IEnumerable<ILineSegment>)segments)
+        : base(segments.ToArray())
     {
     }
 
@@ -55,6 +55,11 @@ internal Polygon(Path path)
     {
     }
 
+    internal Polygon(ILineSegment[] segments, bool owned)
+        : base(owned ? segments : segments.ToArray())
+    {
+    }
+
     /// <inheritdoc />
     public override bool IsClosed => true;
 
@@ -66,13 +71,13 @@ public override IPath Transform(Matrix3x2 matrix)
             return this;
         }
 
-        var segments = new ILineSegment[this.LineSegments.Count];
-        int i = 0;
-        foreach (ILineSegment s in this.LineSegments)
+        ILineSegment[] segments = new ILineSegment[this.LineSegments.Count];
+
+        for (int i = 0; i < segments.Length; i++)
         {
-            segments[i++] = s.Transform(matrix);
+            segments[i] = this.LineSegments[i].Transform(matrix);
         }
 
-        return new Polygon(segments);
+        return new Polygon(segments, true);
     }
 }