mod common;

use ccvl::*;

const OUTER: image::SRGBA = image::SRGBA {
    r: 0.0,
    g: 1.0,
    b: 0.0,
    a: 1.0,
};
const INNER: image::SRGBA = image::SRGBA {
    r: 0.0,
    g: 0.0,
    b: 1.0,
    a: 1.0,
};

fn main() -> std::process::ExitCode {
    common::process_image(|mut img| {
        let greyscale = img.map(|p| image::Luminance::from(p));
		let thresholded = filter::threshold_auto(greyscale);
        let contours = contour::find(thresholded);
        for contour in contours {
            for (x, y) in contour.trace {
                *img.at_mut(x, y) = match contour.kind {
                    contour::Kind::Inner => INNER,
                    contour::Kind::Outer => OUTER,
                };
            }
        }
        img
    })
}