Trying to make tiling work right...

src/Windows/Perspex.Direct2D1/Media/VisualBrushImpl.cs

@@ -29,7 +29,7 @@ namespace Perspex.Direct2D1.Media
 
             var sourceRect = brush.SourceRect.ToPixels(layoutable.Bounds.Size);
             var destinationRect = brush.DestinationRect.ToPixels(targetSize);
-            var bitmapSize = brush.TileMode == TileMode.None ? targetSize : sourceRect.Size;
+            var bitmapSize = brush.TileMode == TileMode.None ? targetSize : destinationRect.Size;
             var scale = brush.Stretch.CalculateScaling(destinationRect.Size, sourceRect.Size);
             var translate = CalculateTranslate(brush, sourceRect, destinationRect, scale);
             var options = CompatibleRenderTargetOptions.None;

tests/Perspex.RenderTests/Media/VisualBrushTests.cs

@@ -411,6 +411,7 @@ namespace Perspex.Direct2D1.RenderTests.Media
                     {
                         Stretch = Stretch.None,
                         TileMode = TileMode.Tile,
+                        DestinationRect = new RelativeRect(0.25, 0.25, 0.5, 0.5, OriginUnit.Percent),
                         Visual = new Border
                         {
                             Width = 92,
@@ -436,7 +437,7 @@ namespace Perspex.Direct2D1.RenderTests.Media
         }
 
         [Fact]
-        public void VisualBrush_Tile_DestinationRect()
+        public void VisualBrush_Tile_Alignment_BottomRight()
         {
             Decorator target = new Decorator
             {
@@ -449,7 +450,8 @@ namespace Perspex.Direct2D1.RenderTests.Media
                     {
                         Stretch = Stretch.None,
                         TileMode = TileMode.Tile,
-                        DestinationRect = new RelativeRect(0.25, 0.25, 0.5, 0.5, OriginUnit.Percent),
+                        AlignmentX = AlignmentX.Right,
+                        AlignmentY = AlignmentY.Bottom,
                         Visual = new Border
                         {
                             Width = 92,