Merge #200

200: Add Oklab support r=Ogeon a=arzg

Oklab assumes the D65 colour space. In my first attempt at implementing this, the `Oklab` struct didn’t have a `Wp` parameter. This caused all `FromColorUnclamped` derives to not compile, so I added the parameter back with comments warning about how it doesn’t have any effect. Ideally this wouldn’t be needed.

Co-authored-by: Aramis Razzaghipour <aramisnoah@gmail.com>

palette/src/equality.rs

@@ -3,8 +3,8 @@ use approx::{AbsDiffEq, RelativeEq, UlpsEq};
 use crate::float::Float;
 use crate::white_point::WhitePoint;
 use crate::{
-    from_f64, FloatComponent, FromF64, Hsluv, Lab, LabHue, Lch, Lchuv, Luv, LuvHue, RgbHue, Xyz,
-    Yxy,
+    from_f64, FloatComponent, FromF64, Hsluv, Lab, LabHue, Lch, Lchuv, Luv, LuvHue, OklabHue,
+    RgbHue, Xyz, Yxy,
 };
 
 macro_rules! impl_eq {
@@ -153,3 +153,4 @@ macro_rules! impl_eq_hue {
 impl_eq_hue!(LabHue);
 impl_eq_hue!(RgbHue);
 impl_eq_hue!(LuvHue);
+impl_eq_hue!(OklabHue);

palette/src/hues.rs

@@ -283,6 +283,11 @@ make_hues! {
     /// It's measured in degrees and uses the three additive primaries _red_,
     /// _green_ and _blue_.
     struct RgbHue;
+
+    /// A hue type for the Oklab color space.
+    ///
+    /// It's measured in degrees.
+    struct OklabHue;
 }
 
 #[inline]
@@ -375,6 +380,7 @@ macro_rules! impl_uniform {
 impl_uniform!(UniformLabHue, LabHue);
 impl_uniform!(UniformRgbHue, RgbHue);
 impl_uniform!(UniformLuvHue, LuvHue);
+impl_uniform!(UniformOklabHue, OklabHue);
 
 #[cfg(test)]
 mod test {

palette/src/lib.rs

@@ -246,6 +246,8 @@ pub use lch::{Lch, Lcha};
 pub use lchuv::{Lchuv, Lchuva};
 pub use luma::{GammaLuma, GammaLumaa, LinLuma, LinLumaa, SrgbLuma, SrgbLumaa};
 pub use luv::{Luv, Luva};
+pub use oklab::{Oklab, Oklaba};
+pub use oklch::{Oklch, Oklcha};
 pub use rgb::{GammaSrgb, GammaSrgba, LinSrgb, LinSrgba, Packed, RgbChannels, Srgb, Srgba};
 pub use xyz::{Xyz, Xyza};
 pub use yxy::{Yxy, Yxya};
@@ -254,7 +256,7 @@ pub use color_difference::ColorDifference;
 pub use component::*;
 pub use convert::{FromColor, IntoColor};
 pub use encoding::pixel::Pixel;
-pub use hues::{LabHue, LuvHue, RgbHue};
+pub use hues::{LabHue, LuvHue, OklabHue, RgbHue};
 pub use matrix::Mat3;
 pub use relative_contrast::{contrast_ratio, RelativeContrast};
 
@@ -432,6 +434,8 @@ mod lch;
 mod lchuv;
 pub mod luma;
 mod luv;
+mod oklab;
+mod oklch;
 pub mod rgb;
 mod xyz;
 mod yxy;