Added layer shapes, editor is still WIP

src/Artemis.Core/Models/Profile/LayerShapes/Ellipse.cs

@@ -0,0 +1,35 @@
+using Artemis.Storage.Entities.Profile;
+using SkiaSharp;
+
+namespace Artemis.Core.Models.Profile.LayerShapes
+{
+    public class Ellipse : LayerShape
+    {
+        public Ellipse(Layer layer) : base(layer)
+        {
+        }
+
+        internal Ellipse(Layer layer, ShapeEntity shapeEntity) : base(layer, shapeEntity)
+        {
+        }
+
+        public override void CalculateRenderProperties()
+        {
+            var width = Layer.AbsoluteRectangle.Width;
+            var height = Layer.AbsoluteRectangle.Height;
+            var rect = SKRect.Create(Position.X * width, Position.Y * height, Size.Width * width, Size.Height * height);
+
+            var path = new SKPath();
+            path.AddOval(rect);
+
+            RenderPath = path;
+            RenderRectangle = path.GetRect();
+        }
+
+        public override void ApplyToEntity()
+        {
+            base.ApplyToEntity();
+            Layer.LayerEntity.ShapeEntity.Type = ShapeEntityType.Ellipse;
+        }
+    }
+}