Update Direct2D to new interfaces

NGraphics/ICanvas.cs

@@ -10,7 +10,7 @@ public interface ICanvas
 		void Transform (Transform transform);
 		void RestoreState ();
 
-		Size MeasureText(string text, Font font);
+		Size MeasureText (string text, Font font);
 		void DrawText (string text, Rect frame, Font font, TextAlignment alignment = TextAlignment.Left, Pen pen = null, Brush brush = null);
 		void DrawPath (IEnumerable<PathOp> ops, Pen pen = null, Brush brush = null);
 		void DrawRectangle (Rect frame, Pen pen = null, Brush brush = null);

NGraphics/SvgReader.cs

@@ -503,7 +503,7 @@ void ReadPath (Path p, string pathDescriptor)
 				match = match.Replace("-", " -");
 				var args = match.Substring(1).Split(WSC, StringSplitOptions.RemoveEmptyEntries);
 
-				Point previousPoint;
+				Point previousPoint = new Point ();
 				if (p.Operations.Count > 0 && !(p.Operations.Last() is ClosePath))
 					previousPoint = p.Operations.Last().EndPoint;
 

Platforms/NGraphics.WindowsStore/Direct2DCanvas.cs

@@ -42,7 +42,7 @@ public WICBitmapCanvas (WIC.Bitmap bmp, D2D1.RenderTargetProperties properties,
 		public IImage GetImage ()
 		{
 			renderTarget.EndDraw ();
-			return new WICBitmapSourceImage (Bmp, factories);
+			return new WICBitmapSourceImage (Bmp, scale, factories);
 		}
 
 		public Size Size
@@ -60,14 +60,19 @@ public class WICBitmapSourceImage : IImage
 	{
 		readonly WIC.BitmapSource bmp;
 		readonly Direct2DFactories factories;
+		readonly double scale;
 
 		public WIC.BitmapSource Bitmap { get { return bmp; } }
 
-		public WICBitmapSourceImage (WIC.BitmapSource bmp, Direct2DFactories factories = null)
+		public Size Size { get { return Conversions.ToSize (bmp.Size); } }
+		public double Scale { get { return scale; } }
+
+		public WICBitmapSourceImage (WIC.BitmapSource bmp, double scale, Direct2DFactories factories = null)
 		{
 			if (bmp == null)
 				throw new ArgumentNullException ("bmp");
 			this.bmp = bmp;
+			this.scale = scale;
 			this.factories = factories ?? Direct2DFactories.Shared;
 		}
 
@@ -173,6 +178,14 @@ public void RestoreState ()
 			}
 		}
 
+		public Size MeasureText (string text, Font font)
+		{
+			float maxWidth = float.MaxValue;
+			float maxHeight = float.MaxValue;
+			var layout = new DW.TextLayout (factories.DWFactory, text, GetTextFormat (font), maxWidth, maxHeight);
+			return new Size (layout.Metrics.Width, layout.Metrics.Height);
+		}
+
 		public void DrawText (string text, Rect frame, Font font, TextAlignment alignment = TextAlignment.Left, Pen pen = null, Brush brush = null)
 		{
 			var layout = new DW.TextLayout (factories.DWFactory, text, GetTextFormat (font), (float)frame.Width, (float)frame.Height);
@@ -435,6 +448,16 @@ public static Size2F ToSize2F (this Size size)
 			return new Size2F ((float)size.Width, (float)size.Height);
 		}
 
+		public static Size ToSize (this Size2F size)
+		{
+			return new Size (size.Width, size.Height);
+		}
+
+		public static Size ToSize (this Size2 size)
+		{
+			return new Size (size.Width, size.Height);
+		}
+
 		public static RectangleF ToRectangleF (this Rect rect)
 		{
 			return new RectangleF ((float)rect.X, (float)rect.Y, (float)rect.Width, (float)rect.Height);

Platforms/NGraphics.WindowsStore/WinRTPlatform.cs

@@ -34,7 +34,7 @@ public IImage CreateImage (Color[] colors, int width, double scale = 1.0)
 						DataPointer = (IntPtr)p,
 					};
 					var bmp = new WIC.Bitmap (factories.WICFactory, width, colors.Length / width, pf, data);
-					return new WICBitmapSourceImage (bmp, factories);
+					return new WICBitmapSourceImage (bmp, scale, factories);
 				}
 			}
 		}
@@ -55,7 +55,7 @@ public IImage LoadImage (Stream stream)
 			}
 
 			// Convert the BitmapSource to a Bitmap so we can allow the decoder to go out of memory
-			return new WICBitmapSourceImage (new WIC.Bitmap (factories.WICFactory, b, WIC.BitmapCreateCacheOption.CacheOnLoad), factories);
+			return new WICBitmapSourceImage (new WIC.Bitmap (factories.WICFactory, b, WIC.BitmapCreateCacheOption.CacheOnLoad), 1.0, factories);
 		}
 
 		public IImage LoadImage (string path)