tee_morphosis 1.3.1

Lib for parsing, splitting and building tee
Documentation 
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//! Module for color transforms

pub type HSL = (f32, f32, f32);
pub type RGB = (f32, f32, f32);

use image::RgbaImage;
use rayon::iter::{ParallelBridge, ParallelIterator};

const DARKEST_LGT: f32 = 0.5;

/// Convert ddnet color format to hsl
pub fn ddnet_color_to_hsl(color: u32) -> HSL {
    let h_raw = ((color >> 16) & 0xFF) as f32;
    let s_raw = ((color >> 8) & 0xFF) as f32;
    let l_raw = (color & 0xFF) as f32;

    let h = h_raw / 255.0;
    let s = s_raw / 255.0;
    let l_compressed = l_raw / 255.0;

    let l = DARKEST_LGT + l_compressed * (1.0 - DARKEST_LGT);

    (h, s, l)
}

/// Convert hsl for rgb compatibilities
fn hsl_to_rgb((h, s, l): HSL) -> RGB {
    let h1 = h * 6.0;
    let c = (1.0 - (2.0 * l - 1.0).abs()) * s;
    let x = c * (1.0 - ((h1 % 2.0) - 1.0).abs());

    let (r, g, b) = match h1.floor() as i32 {
        0 => (c, x, 0.0),
        1 => (x, c, 0.0),
        2 => (0.0, c, x),
        3 => (0.0, x, c),
        4 => (x, 0.0, c),
        5 | 6 => (c, 0.0, x),
        _ => (c, 0.0, x),
    };

    let m = l - (c / 2.0);
    (r + m, g + m, b + m)
}

/// Take img and apply hsl to it
pub fn img_hsl_transform(
    img: &mut RgbaImage,
    (h, s, l): HSL,
) {
    let (r, g, b) = hsl_to_rgb((h, s, l));

    img.pixels_mut().par_bridge().for_each(|pixel| {
        pixel[0] = ((pixel[0] as f32 / 255.0 * r) * 255.0).clamp(0.0, 255.0) as u8;
        pixel[1] = ((pixel[1] as f32 / 255.0 * g) * 255.0).clamp(0.0, 255.0) as u8;
        pixel[2] = ((pixel[2] as f32 / 255.0 * b) * 255.0).clamp(0.0, 255.0) as u8;
    });
}