/// <summary>
/// DrawEllipse -
/// Draw an ellipse with the provided Brush and/or Pen.
/// If both the Brush and Pen are null this call is a no-op.
/// </summary>
/// <param name="brush">
/// The Brush with which to fill the ellipse.
/// This is optional, and can be null, in which case no fill is performed.
/// </param>
/// <param name="pen">
/// The Pen with which to stroke the ellipse.
/// This is optional, and can be null, in which case no stroke is performed.
/// </param>
/// <param name="center">
/// The center of the ellipse to fill and/or stroke.
/// </param>
/// <param name="radiusX">
/// The radius in the X dimension of the ellipse.
/// The absolute value of the radius provided will be used.
/// </param>
/// <param name="radiusY">
/// The radius in the Y dimension of the ellipse.
/// The absolute value of the radius provided will be used.
/// </param>
public override void DrawEllipse(
Brush brush,
Pen pen,
Point center,
Double radiusX,
Double radiusY)
{
if ((brush != null) || Pen.ContributesToBounds(pen))
{
// _bounds is always in "world" space
// So, we need to transform the geometry to world to bound it
Rect geometryBounds = EllipseGeometry.GetBoundsHelper(
pen,
_transform, // world transform
center,
radiusX,
radiusY,
Matrix.Identity, // geometry transform
Geometry.StandardFlatteningTolerance,
ToleranceType.Absolute
);
AddTransformedBounds(ref geometryBounds);
}
}
/// <summary>
/// Returns the axis-aligned bounding rectangle when stroked with a pen, after applying
/// the supplied transform (if non-null).
/// </summary>
internal override Rect GetBoundsInternal(Pen pen, Matrix matrix, double tolerance, ToleranceType type)
{
Matrix geometryMatrix;
Transform.GetTransformValue(Transform, out geometryMatrix);
return(EllipseGeometry.GetBoundsHelper(
pen,
matrix,
Center,
RadiusX,
RadiusY,
geometryMatrix,
tolerance,
type));
}