Struct Hwb

pub struct Hwb;

🌌 The HWB color space

The HWB color space is a convenient way to represent colors. It corresponds closely to popular color pickers, both a triangle with white, black, and fully saturated color at the corner, and also a rectangle with a hue spectrum at the top and black at the bottom, with whiteness as a separate slider. It was proposed in HWB–A More Intuitive Hue-Based Color Model.

Its components are [H, W, B] with

• H - the hue angle in degrees, with red at 0, green at 120, and blue at 240.
• W - an amount of whiteness to mix in, with 100 being white.
• B - an amount of blackness to mix in, with 100 being black.

The hue angle is the same as in Hsl, and thus has the same flaw of poor hue uniformity.

This corresponds to the color space in CSS Color Module Level 4 § 8.

Trait Implementations

impl Clone for Hwb

fn clone(&self) -> Hwb

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl ColorSpace for Hwb

const TAG: Option<ColorSpaceTag>

The tag corresponding to this color space, if a matching tag exists.

const LAYOUT: ColorSpaceLayout = ColorSpaceLayout::HueFirst

The layout of the color space.

const WHITE_COMPONENTS: [f32; 3]

The component values for the color white within this color space.

fn from_linear_srgb(src: [f32; 3]) -> [f32; 3]

Convert an opaque color from linear sRGB.

fn to_linear_srgb(src: [f32; 3]) -> [f32; 3]

Convert an opaque color to linear sRGB.

fn convert<TargetCS: ColorSpace>(src: [f32; 3]) -> [f32; 3]

Convert to a different color space.

fn clip([h, w, b]: [f32; 3]) -> [f32; 3]

Clip the color’s components to fit within the natural gamut of the color space.

const IS_LINEAR: bool = false

Whether the color space is linear.

const WHITE_POINT: Chromaticity = Chromaticity::D65

The white point of the color space.

fn to_linear_srgb_absolute(src: [f32; 3]) -> [f32; 3]

Convert an opaque color to linear sRGB, without chromatic adaptation.

fn from_linear_srgb_absolute(src: [f32; 3]) -> [f32; 3]

Convert an opaque color from linear sRGB, without chromatic adaptation.

fn convert_absolute<TargetCS: ColorSpace>(src: [f32; 3]) -> [f32; 3]

Convert to a different color space, without chromatic adaptation.

fn chromatically_adapt( src: [f32; 3], from: Chromaticity, to: Chromaticity, ) -> [f32; 3]

Chromatically adapt the color between the given white point chromaticities.

fn scale_chroma(src: [f32; 3], scale: f32) -> [f32; 3]

Scale the chroma by the given amount.

impl Debug for Hwb

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<Hwb> for ColorSpaceTag

fn from(_: Hwb) -> Self

Converts to this type from the input type.

impl Copy for Hwb