Adds to a path an ellipse that fits inside a rectangle.
- iOS 2.0+
- macOS 10.4+
- tvOS 9.0+
- watchOS 2.0+
- Core Graphics
The path to modify.
An affine transform to apply to the ellipse, or
NULLif you don’t want to transform the ellipse.
A rectangle to enclose the ellipse.
The ellipse is approximated by a sequence of Bézier curves. Its center is the midpoint of the rectangle defined by the
rect parameter. If the rectangle is square, then the ellipse is circular with a radius equal to one-half the width (or height) of the rectangle. If the
rect parameter specifies a rectangular shape, then the major and minor axes of the ellipse are defined by the width and height of the rectangle.
The ellipse forms a complete subpath of the path—that is, the ellipse drawing starts with a move-to operation and ends with a close-subpath operation, with all moves oriented in the clockwise direction. If you supply an affine transform, then the constructed Bézier curves that define the ellipse are transformed before they are added to the path.