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include!(concat!(env!("OUT_DIR"), "/colors.rs"));
#[cfg(not(feature = "no_std"))]
use std::fmt;
#[derive(Copy, Clone, PartialOrd, Default)]
#[repr(packed)]
pub struct Color {
pub data: u32,
}
impl Color {
pub const fn rgb(r: u8, g: u8, b: u8) -> Self {
Color {
data: 0xFF00_0000 | ((r as u32) << 16) | ((g as u32) << 8) | (b as u32),
}
}
pub fn hsv(h: f64, s: f64, v: f64) -> Self {
Self::hsva(h, s, v, 1.0)
}
pub fn hsl(h: f64, s: f64, l: f64) -> Self {
Self::hsla(h, s, l, 1.0)
}
pub const fn rgba(r: u8, g: u8, b: u8, a: u8) -> Self {
Color {
data: ((a as u32) << 24) | ((r as u32) << 16) | ((g as u32) << 8) | (b as u32),
}
}
pub fn hsva(mut hue: f64, mut saturation: f64, mut value: f64, alpha: f64) -> Self {
hue %= 360.0;
saturation = saturation.max(0.0).min(1.0);
value = value.max(0.0).min(1.0);
let hh = hue / 60.0;
let idx = hh.floor() as i32;
let ff = hh.fract();
let chroma = value * (1.0 - saturation);
let second_component = value * (1.0 - (saturation * ff));
let t = value * (1.0 - (saturation * (1.0 - ff)));
let (r, g, b) = match idx {
0 => (value, t, chroma),
1 => (second_component, value, chroma),
2 => (chroma, value, t),
3 => (chroma, second_component, value),
4 => (t, chroma, value),
5 => (value, chroma, second_component),
_ => unreachable!(),
};
Self::rgba(
(r * 255.0) as u8,
(g * 255.0) as u8,
(b * 255.0) as u8,
(alpha * 255.0) as u8,
)
}
pub fn hsla(mut hue: f64, mut saturation: f64, mut lightness: f64, alpha: f64) -> Self {
hue %= 360.0;
saturation = saturation.max(0.0).min(1.0);
lightness = lightness.max(0.0).min(1.0);
let hh = hue / 60.0;
let idx = hh.floor() as i32;
let chroma = (1.0 - ((2.0 * lightness) - 1.0).abs()) * saturation;
let second_component = chroma * (1.0 - (((idx % 2) as f64) - 1.0).abs());
let (mut r, mut g, mut b) = match idx {
0 => (chroma, second_component, 0.0),
1 => (second_component, chroma, 0.0),
2 => (0.0, chroma, second_component),
3 => (0.0, second_component, chroma),
4 => (second_component, 0.0, chroma),
5 => (chroma, 0.0, second_component),
_ => unreachable!(),
};
let adjustment = lightness - chroma / 2.0;
r += adjustment;
g += adjustment;
b += adjustment;
Self::rgba(
(r.min(1.0) * 255.0) as u8,
(g.min(1.0) * 255.0) as u8,
(b.min(1.0) * 255.0) as u8,
(alpha * 255.0) as u8,
)
}
pub fn r(self) -> u8 {
((self.data & 0x00FF_0000) >> 16) as u8
}
pub fn g(self) -> u8 {
((self.data & 0x0000_FF00) >> 8) as u8
}
pub fn b(self) -> u8 {
(self.data & 0x0000_00FF) as u8
}
pub fn a(self) -> u8 {
((self.data & 0xFF00_0000) >> 24) as u8
}
pub fn from_name(name: &str) -> Option<Color> {
COLORS.get(name).cloned()
}
pub fn interpolate(start_color: Color, end_color: Color, scale: f64) -> Color {
let r = Color::interp(start_color.r(), end_color.r(), scale);
let g = Color::interp(start_color.g(), end_color.g(), scale);
let b = Color::interp(start_color.b(), end_color.b(), scale);
let a = Color::interp(start_color.a(), end_color.a(), scale);
Color::rgba(r, g, b, a)
}
fn interp(start_color: u8, end_color: u8, scale: f64) -> u8 {
(end_color as f64 - start_color as f64).mul_add(scale, start_color as f64) as u8
}
}
impl ToString for Color {
fn to_string(&self) -> String {
if self.a() == 0 {
return String::from("transparent");
}
let data = self.data;
let mut color = format!("#{:x}", data);
color.remove(1);
color.remove(1);
color
}
}
impl From<&str> for Color {
fn from(s: &str) -> Color {
if !s.starts_with('#') {
if let Some(color) = Color::from_name(s) {
return color;
}
}
let clean_hex = s.trim_start_matches('#');
match clean_hex.len() {
3 | 4 => {
let num = u32::from_str_radix(clean_hex, 16).unwrap_or(0);
let mut blue = (num & 0xF) << 4;
let mut green = ((num >> 4) & 0xF) << 4;
let mut red = ((num >> 8) & 0xF) << 4;
let mut alpha = match clean_hex.len() == 4 {
true => ((num >> 12) & 0xF) << 4,
false => 0xF,
};
red |= red >> 4;
green |= green >> 4;
blue |= blue >> 4;
alpha |= alpha >> 4;
Color::rgba(red as u8, green as u8, blue as u8, alpha as u8)
}
6 | 8 => {
let mut x = u32::from_str_radix(clean_hex, 16).unwrap_or(0);
if clean_hex.len() == 6 {
x |= 0xFF00_0000;
}
Color { data: x }
}
_ => Color { data: 0 },
}
}
}
impl From<String> for Color {
fn from(s: String) -> Color {
Color::from(s.as_str())
}
}
impl PartialEq for Color {
fn eq(&self, other: &Color) -> bool {
self.r() == other.r() && self.g() == other.g() && self.b() == other.b()
}
}
#[cfg(not(feature = "no_std"))]
impl fmt::Debug for Color {
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
write!(f, "{:#010X}", { self.data })
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn partial_eq() {
let color_1 = Color::rgb(1, 2, 3);
let color_2 = Color::rgba(1, 2, 3, 200);
let color_3 = Color::rgba(11, 2, 3, 200);
assert!(
color_1.eq(&color_2),
"color_1={:?}(, color_2={:?}",
&color_1,
&color_2
);
assert!(
color_1.eq(&color_2),
"color_1={:?}(, color_2={:?}",
&color_1,
&color_2
);
assert!(
color_2.ne(&color_3),
"color_1={:?}(, color_2={:?}",
&color_2,
&color_3
);
}
}
