Function imageproc::drawing::draw_filled_ellipse

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

Draw as much of an ellipse, including its contents, as lies inside the image bounds. Uses Midpoint Ellipse Drawing Algorithm. (Modified from Bresenham's algorithm) (http://tutsheap.com/c/mid-point-ellipse-drawing-algorithm/)

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

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