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// Code liberally borrowed from here
// https://github.com/navierr/coloriz
use std::ops;
use std::u32;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct Rgb {
/// Red
pub r: u8,
/// Green
pub g: u8,
/// Blue
pub b: u8,
}
impl Rgb {
/// Creates a new [Rgb] color
#[inline]
pub const fn new(r: u8, g: u8, b: u8) -> Self {
Self { r, g, b }
}
/// Creates a new [Rgb] color with a hex code
#[inline]
pub const fn from_hex(hex: u32) -> Self {
Self::new((hex >> 16) as u8, (hex >> 8) as u8, hex as u8)
}
pub fn from_hex_string(hex: String) -> Self {
if hex.chars().count() == 8 && hex.starts_with("0x") {
// eprintln!("hex:{:?}", hex);
let (_, value_string) = hex.split_at(2);
// eprintln!("value_string:{:?}", value_string);
let int_val = u64::from_str_radix(value_string, 16);
match int_val {
Ok(num) => Self::new(
((num & 0xff0000) >> 16) as u8,
((num & 0xff00) >> 8) as u8,
(num & 0xff) as u8,
),
// Don't fail, just make the color black
// Should we fail?
_ => Self::new(0, 0, 0),
}
} else {
// Don't fail, just make the color black.
// Should we fail?
Self::new(0, 0, 0)
}
}
/// Creates a new [Rgb] color with three [f32] values
pub fn from_f32(r: f32, g: f32, b: f32) -> Self {
Self::new(
(r.clamp(0.0, 1.0) * 255.0) as u8,
(g.clamp(0.0, 1.0) * 255.0) as u8,
(b.clamp(0.0, 1.0) * 255.0) as u8,
)
}
/// Creates a grayscale [Rgb] color
#[inline]
pub const fn gray(x: u8) -> Self {
Self::new(x, x, x)
}
/// Creates a grayscale [Rgb] color with a [f32] value
pub fn gray_f32(x: f32) -> Self {
Self::from_f32(x, x, x)
}
/// Creates a new [Rgb] color from a [HSL] color
// pub fn from_hsl(hsl: HSL) -> Self {
// if hsl.s == 0.0 {
// return Self::gray_f32(hsl.l);
// }
// let q = if hsl.l < 0.5 {
// hsl.l * (1.0 + hsl.s)
// } else {
// hsl.l + hsl.s - hsl.l * hsl.s
// };
// let p = 2.0 * hsl.l - q;
// let h2c = |t: f32| {
// let t = t.clamp(0.0, 1.0);
// if 6.0 * t < 1.0 {
// p + 6.0 * (q - p) * t
// } else if t < 0.5 {
// q
// } else if 1.0 < 1.5 * t {
// p + 6.0 * (q - p) * (1.0 / 1.5 - t)
// } else {
// p
// }
// };
// Self::from_f32(h2c(hsl.h + 1.0 / 3.0), h2c(hsl.h), h2c(hsl.h - 1.0 / 3.0))
// }
/// Computes the linear interpolation between `self` and `other` for `t`
pub fn lerp(&self, other: Self, t: f32) -> Self {
let t = t.clamp(0.0, 1.0);
self * (1.0 - t) + other * t
}
}
impl From<(u8, u8, u8)> for Rgb {
fn from((r, g, b): (u8, u8, u8)) -> Self {
Self::new(r, g, b)
}
}
impl From<(f32, f32, f32)> for Rgb {
fn from((r, g, b): (f32, f32, f32)) -> Self {
Self::from_f32(r, g, b)
}
}
use crate::ANSIColorCode;
use crate::TargetGround;
impl ANSIColorCode for Rgb {
fn ansi_color_code(&self, target: TargetGround) -> String {
format!("{};2;{};{};{}", target.code() + 8, self.r, self.g, self.b)
}
}
overload::overload!(
(lhs: ?Rgb) + (rhs: ?Rgb) -> Rgb {
Rgb::new(
lhs.r.saturating_add(rhs.r),
lhs.g.saturating_add(rhs.g),
lhs.b.saturating_add(rhs.b)
)
}
);
overload::overload!(
(lhs: ?Rgb) - (rhs: ?Rgb) -> Rgb {
Rgb::new(
lhs.r.saturating_sub(rhs.r),
lhs.g.saturating_sub(rhs.g),
lhs.b.saturating_sub(rhs.b)
)
}
);
overload::overload!(
(lhs: ?Rgb) * (rhs: ?f32) -> Rgb {
Rgb::new(
(lhs.r as f32 * rhs.clamp(0.0, 1.0)) as u8,
(lhs.g as f32 * rhs.clamp(0.0, 1.0)) as u8,
(lhs.b as f32 * rhs.clamp(0.0, 1.0)) as u8
)
}
);
overload::overload!(
(lhs: ?f32) * (rhs: ?Rgb) -> Rgb {
Rgb::new(
(rhs.r as f32 * lhs.clamp(0.0, 1.0)) as u8,
(rhs.g as f32 * lhs.clamp(0.0, 1.0)) as u8,
(rhs.b as f32 * lhs.clamp(0.0, 1.0)) as u8
)
}
);
overload::overload!(
-(rgb: ?Rgb) -> Rgb {
Rgb::new(
255 - rgb.r,
255 - rgb.g,
255 - rgb.b)
}
);