kusa_pixel 3.0.0

use crate::data::pointing::KusaPoint;
use crate::paint_tool::Nib;
use crate::piston_wrapper::kusa_image::KusaImage;
use crate::settings::Settings;

/// 正方形のペン先
pub struct SquareNib {}
impl Nib for SquareNib {
    // 点を置くぜ（＾～＾）
    fn put_pixel(&self, settings: &Settings, k_image: &mut KusaImage, center: &KusaPoint) {
        // 半径
        let radius = settings.paint_thickness / 2.0;

        let left = {
            // 四捨五入
            let mut left = (center.x - radius).round() as i16;
            if left < 0 {
                left = 0;
            }
            left
        };

        let right = {
            let mut right = (center.x + radius).round() as i16;
            if settings.image_width as i16 <= right {
                right = settings.image_width as i16; // - 1
            }
            right as i16
        };

        let top = {
            let mut top = (center.y - radius).round() as i16;
            if top < 0 {
                top = 0;
            }
            top
        };

        let bottom = {
            let mut bottom = (center.y + radius).round() as i16;
            if settings.image_height as i16 <= bottom {
                bottom = settings.image_width as i16; //  - 1
            }
            bottom as i16
        };
        // println!(
        //     "Trace   | left={} right={} top={} bottom={}",
        //     left, right, top, bottom
        // );

        for y in top..bottom {
            for x in left..right {
                // 点を１個打って画像として保存するぜ☆（＾～＾）画面への描画は別のところでやってるぜ☆（＾～＾）
                // if 0 <= x
                //     && x < settings.image_width as i16
                //     && 0 <= y
                //     && y < settings.image_height as i16
                // {
                k_image.set_pixel(x as u32, y as u32, &settings.paint_color);
                //}
            }
        }
    }
}