public void AddViewport(ShadowVisual shadowViewport)
{
_viewports[shadowViewport.Visual] = shadowViewport;
ViewportAdded?.Invoke(this, new ShadowViewportEventArgs(shadowViewport));
// update viewport count on hosting monitor
ShadowMonitor monitor = _monitors[shadowViewport.Monitor];
monitor.AddViewport();
shadowViewport.ViewportChanged += Raw_ViewportChanged;
// recalculate, delayed
ScheduleGeometryChange();
}
