Started work on layer visualization

src/Artemis.UI/Screens/Module/ProfileEditor/Visualization/ProfileLayerViewModel.cs

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+using System;
+using System.Linq;
+using System.Windows;
+using System.Windows.Media;
+using Artemis.Core.Models.Profile;
+using Artemis.Core.Models.Surface;
+using Artemis.UI.Extensions;
+using RGB.NET.Core;
+
+namespace Artemis.UI.Screens.Module.ProfileEditor.Visualization
+{
+    public class ProfileLayerViewModel : CanvasViewModel
+    {
+        public ProfileLayerViewModel(Layer layer)
+        {
+            Layer = layer;
+
+            CreateLayerGeometry();
+            Layer.RenderPropertiesUpdated += (sender, args) => CreateLayerGeometry();
+        }
+
+        public Layer Layer { get; }
+
+        public Geometry LayerGeometry { get; set; }
+
+        private void CreateLayerGeometry()
+        {
+            var layerGeometry = Geometry.Empty;
+            
+            foreach (var led in Layer.Leds)
+            {
+                Geometry geometry;
+                switch (led.RgbLed.Shape)
+                {
+                    case Shape.Custom:
+                        if (led.RgbLed.Device.DeviceInfo.DeviceType == RGBDeviceType.Keyboard || led.RgbLed.Device.DeviceInfo.DeviceType == RGBDeviceType.Keypad)
+                            geometry = CreateCustomGeometry(led, 2.0);
+                        else
+                            geometry = CreateCustomGeometry(led, 1.0);
+                        break;
+                    case Shape.Rectangle:
+                        if (led.RgbLed.Device.DeviceInfo.DeviceType == RGBDeviceType.Keyboard || led.RgbLed.Device.DeviceInfo.DeviceType == RGBDeviceType.Keypad)
+                            geometry = CreateKeyCapGeometry(led);
+                        else
+                            geometry = CreateRectangleGeometry(led);
+                        break;
+                    case Shape.Circle:
+                        geometry = CreateCircleGeometry(led);
+                        break;
+                    default:
+                        throw new ArgumentOutOfRangeException();
+                }
+
+                layerGeometry = Geometry.Combine(layerGeometry, geometry, GeometryCombineMode.Union, null, 5, ToleranceType.Absolute);
+            }
+
+            LayerGeometry = layerGeometry;
+            LayerGeometry.Freeze();
+        }
+
+        private Geometry CreateRectangleGeometry(ArtemisLed led)
+        {
+            return new RectangleGeometry(led.RgbLed.AbsoluteLedRectangle.ToWindowsRect(1));
+        }
+
+        private Geometry CreateCircleGeometry(ArtemisLed led)
+        {
+            return new EllipseGeometry(led.RgbLed.AbsoluteLedRectangle.ToWindowsRect(1));
+        }
+
+        private Geometry CreateKeyCapGeometry(ArtemisLed led)
+        {
+            return new RectangleGeometry(led.RgbLed.AbsoluteLedRectangle.ToWindowsRect(1), 1.6, 1.6);
+        }
+
+        private Geometry CreateCustomGeometry(ArtemisLed led, double deflateAmount)
+        {
+            try
+            {
+                var geometry = Geometry.Combine(
+                    Geometry.Empty,
+                    Geometry.Parse(led.RgbLed.ShapeData),
+                    GeometryCombineMode.Union,
+                    new TransformGroup
+                    {
+                        Children = new TransformCollection
+                        {
+                            new ScaleTransform(led.RgbLed.ActualSize.Width - deflateAmount, led.RgbLed.ActualSize.Height - deflateAmount),
+                            new TranslateTransform(deflateAmount / 2, deflateAmount / 2)
+                        }
+                    }
+                );
+                return geometry;
+            }
+            catch (Exception)
+            {
+                return CreateRectangleGeometry(led);
+            }
+        }
+    }
+}