C#
C++/CLI
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public bool PushLayer(Rect rect)
rect
The content rectangle mask for the layer.
If this method succeeds, it returns true. Otherwise, it returns false.
The PushLayer method allows a caller to begin redirecting drawing to a layer. All drawing operations are valid in a layer. The location of the layer is affected by the transform set on the surface.
Each PushLayer must have a matching PopLayer call. If there are more PopLayer calls than PushLayer calls, the EndDraw return false indicates that an error occurs.
using Leadtools.Windows.D2DRendering;public void D2DSurfacePushLayerExample(){//Create a new instance of the D2DSurface objectD2DSurface d2dSurface = new D2DSurface();//Set the surface Sized2dSurface.SurfaceSize = new Size(1000, 1000);//Pass an empty rect to redraw the entire surfaced2dSurface.BeginDraw(Rect.Empty);//Save the surface drawing stateD2DDrawingState drawingState = d2dSurface.Save();//Create an ellipse geometryEllipseGeometry ellipse = new EllipseGeometry();ellipse.Center = new Point(500, 500);ellipse.RadiusX = 100;ellipse.RadiusY = 100;GeometryGroup geometryGroup = new GeometryGroup();geometryGroup.Children.Add(ellipse);//Push geometry to receive all subsequent drawing operationsd2dSurface.PushLayer(geometryGroup);//Create a rect having the specified dimensionsRect rect = new Rect(40, 40, 500, 200);//Create a new instance of a brush from a new solid color brushSolidColorBrush fill = new SolidColorBrush(Colors.Green);//Clear the pushed Layer with the fill brushd2dSurface.Clear(fill);//Stop redirecting drawing operations to the layerd2dSurface.PopLayer();//Restore the surface drawing stated2dSurface.Restore(drawingState);//End the Draw operation and invalidate the surfaced2dSurface.EndDraw();d2dSurface.Invalidate(Rect.Empty);}