/// <summary>
/// Draws an ellipse with the specified Brush and Pen.
/// </summary>
/// <param name="brush">The brush used to fill the ellipse, or <c>null</c> for no fill.</param>
/// <param name="pen">The pen used to stroke the ellipse, or <c>null</c> for no stroke.</param>
/// <param name="center">The location of the center of the ellipse.</param>
/// <param name="radiusX">The horizontal radius of the ellipse.</param>
/// <param name="radiusY">The vertical radius of the ellipse.</param>
/// <remarks>
/// The brush and the pen can both be null. If the brush is null, then no fill is performed.
/// If the pen is null, then no stoke is performed. If both the pen and the brush are null, then the drawing is not visible.
/// </remarks>
public void DrawEllipse(IBrush?brush, IPen?pen, Point center, double radiusX, double radiusY)
{
if (brush == null && !PenIsVisible(pen))
{
return;
}
var originX = center.X - radiusX;
var originY = center.Y - radiusY;
var width = radiusX * 2;
var height = radiusY * 2;
PlatformImpl.DrawEllipse(brush, pen, new Rect(originX, originY, width, height));
}
