bubbles-rs 0.2.0

use crossterm::style::Color;
use fast_srgb8::f32_to_srgb8;
use palette::{Gradient, LinSrgb, Shade};
use std::str::FromStr;

pub struct Gradients {}

impl Gradients {
    pub fn from_colors(colors: &[&str], resolution: usize) -> Vec<Color> {
        let mut gradient_starts = Vec::new();
        let mut gradient_ends = Vec::new();

        let (starts, ends) = if colors.len() > 2 {
            colors.split_at(colors.len() / 2)
        } else {
            (&colors[..1], &colors[1..])
        };

        for color in starts {
            let c = LinSrgb::from_str(color).unwrap().into_format();

            let mut gs = vec![
                c.darken_fixed(0.3),
                c.darken_fixed(0.3),
                c.darken_fixed(0.2),
            ];

            gradient_starts.append(&mut gs);
        }

        for color in ends {
            let c = LinSrgb::from_str(color).unwrap().into_format();

            let mut gs = vec![
                c.darken_fixed(0.2),
                c.darken_fixed(0.3),
                c.darken_fixed(0.4),
            ];

            gradient_ends.append(&mut gs);
        }

        let gradient = Gradient::new(vec![gradient_starts, gradient_ends].concat());

        gradient
            .take(resolution)
            .map(|c| Color::Rgb {
                r: f32_to_srgb8(c.red),
                g: f32_to_srgb8(c.green),
                b: f32_to_srgb8(c.blue),
            })
            .collect()
    }
}