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#![cfg_attr(feature = "document-features", doc = document_features::document_features!())]
#![allow(clippy::wrong_self_convention)]
#[cfg(feature = "cint")]
mod cint_impl;
#[cfg(feature = "cint")]
pub use cint_impl::*;
mod color32;
pub use color32::*;
mod hsva_gamma;
pub use hsva_gamma::*;
mod hsva;
pub use hsva::*;
#[cfg(feature = "color-hex")]
mod hex_color_macro;
mod rgba;
pub use rgba::*;
impl From<Color32> for Rgba {
fn from(srgba: Color32) -> Rgba {
Rgba([
linear_f32_from_gamma_u8(srgba.0[0]),
linear_f32_from_gamma_u8(srgba.0[1]),
linear_f32_from_gamma_u8(srgba.0[2]),
linear_f32_from_linear_u8(srgba.0[3]),
])
}
}
impl From<Rgba> for Color32 {
fn from(rgba: Rgba) -> Color32 {
Color32([
gamma_u8_from_linear_f32(rgba.0[0]),
gamma_u8_from_linear_f32(rgba.0[1]),
gamma_u8_from_linear_f32(rgba.0[2]),
linear_u8_from_linear_f32(rgba.0[3]),
])
}
}
pub fn linear_f32_from_gamma_u8(s: u8) -> f32 {
if s <= 10 {
s as f32 / 3294.6
} else {
((s as f32 + 14.025) / 269.025).powf(2.4)
}
}
#[inline(always)]
pub fn linear_f32_from_linear_u8(a: u8) -> f32 {
a as f32 / 255.0
}
pub fn gamma_u8_from_linear_f32(l: f32) -> u8 {
if l <= 0.0 {
0
} else if l <= 0.0031308 {
fast_round(3294.6 * l)
} else if l <= 1.0 {
fast_round(269.025 * l.powf(1.0 / 2.4) - 14.025)
} else {
255
}
}
#[inline(always)]
pub fn linear_u8_from_linear_f32(a: f32) -> u8 {
fast_round(a * 255.0)
}
fn fast_round(r: f32) -> u8 {
(r + 0.5).floor() as _ }
#[test]
pub fn test_srgba_conversion() {
for b in 0..=255 {
let l = linear_f32_from_gamma_u8(b);
assert!(0.0 <= l && l <= 1.0);
assert_eq!(gamma_u8_from_linear_f32(l), b);
}
}
pub fn linear_from_gamma(gamma: f32) -> f32 {
if gamma < 0.0 {
-linear_from_gamma(-gamma)
} else if gamma <= 0.04045 {
gamma / 12.92
} else {
((gamma + 0.055) / 1.055).powf(2.4)
}
}
pub fn gamma_from_linear(linear: f32) -> f32 {
if linear < 0.0 {
-gamma_from_linear(-linear)
} else if linear <= 0.0031308 {
12.92 * linear
} else {
1.055 * linear.powf(1.0 / 2.4) - 0.055
}
}
#[macro_export]
macro_rules! ecolor_assert {
($($arg: tt)*) => {
if cfg!(any(
feature = "extra_asserts",
all(feature = "extra_debug_asserts", debug_assertions),
)) {
assert!($($arg)*);
}
}
}
pub fn tint_color_towards(color: Color32, target: Color32) -> Color32 {
let [mut r, mut g, mut b, mut a] = color.to_array();
if a == 0 {
r /= 2;
g /= 2;
b /= 2;
} else if a < 170 {
let div = (2 * 255 / a as i32) as u8;
r = r / 2 + target.r() / div;
g = g / 2 + target.g() / div;
b = b / 2 + target.b() / div;
a /= 2;
} else {
r = r / 2 + target.r() / 2;
g = g / 2 + target.g() / 2;
b = b / 2 + target.b() / 2;
}
Color32::from_rgba_premultiplied(r, g, b, a)
}