public void DrawShadow(StiContext sg, RectangleF rect, float radius)
{
geoms.Add(new StiShadowGeom(sg, rect, radius));
}
public StiShadowGeom(StiContext shadowContext, RectangleF rect, float radius)
{
this.ShadowContext = shadowContext;
this.Rect = rect;
this.Radius = radius;
}