protected override void OnFillRegionComputed(Point[][] polygonSet) { using (PdnGraphicsPath path = new PdnGraphicsPath()) { path.AddPolygons(polygonSet); using (PdnRegion fillRegion = new PdnRegion(path)) { Rectangle boundingBox = fillRegion.GetBoundsInt(); Surface surface = ((BitmapLayer)ActiveLayer).Surface; RenderArgs ra = new RenderArgs(surface); HistoryMemento ha; using (PdnRegion affected = Utility.SimplifyAndInflateRegion(fillRegion)) { ha = new BitmapHistoryMemento(Name, Image, DocumentWorkspace, DocumentWorkspace.ActiveLayerIndex, affected); } ra.Graphics.CompositingMode = AppEnvironment.GetCompositingMode(); ra.Graphics.FillRegion(brush, fillRegion.GetRegionReadOnly()); HistoryStack.PushNewMemento(ha); ActiveLayer.Invalidate(boundingBox); Update(); } } }