Function imageproc::drawing::draw_hollow_ellipse

pub fn draw_hollow_ellipse<I>(
    image: &I,
    center: (i32, i32),
    width_radius: i32,
    height_radius: i32,
    color: I::Pixel
) -> Image<I::Pixel>
where
    I: GenericImage,

Draws the outline of an ellipse on a new copy of an image.

Draws as much of an ellipse as lies inside the image bounds.

Uses the Midpoint Ellipse Drawing Algorithm. (Modified from Bresenham’s algorithm)

The ellipse is axis-aligned and satisfies the following equation:

(x^2 / width_radius^2) + (y^2 / height_radius^2) = 1