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Add DynamicColor::new constructor for convenience #219

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Merged
tomcur merged 3 commits into from
May 9, 2026
Merged

Add DynamicColor::new constructor for convenience #219

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940dca2
Add `DynamicColor::new` constructor for convenience
tomcur May 6, 2026
c52c010
Use constructor in `from_alpha_color`
tomcur May 6, 2026
086ed4c
Changelog
tomcur May 9, 2026
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5 changes: 5 additions & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,10 @@ You can find its changes [documented below](#033-2026-05-05).

This release has an [MSRV][] of 1.86.

### Added

- Add a `const` `DynamicColor::new` constructor for convenience, taking a color space tag and color components, and setting default `Flags`. ([#219][] by [@tomcur][])

### Changed

- `Flags::set_missing`, `Flags::discard_name`, `Flags::set_named_color_space`, and `Missing::insert` are now `const` thanks to the MSRV update. ([#218][] by [@DJMcNab][])
Expand Down Expand Up @@ -231,6 +235,7 @@ This is the initial release.
[#210]: https://github.com/linebender/color/pull/210
[#211]: https://github.com/linebender/color/pull/211
[#218]: https://github.com/linebender/color/pull/218
[#219]: https://github.com/linebender/color/pull/219

[Unreleased]: https://github.com/linebender/color/compare/v0.3.3...HEAD
[0.3.3]: https://github.com/linebender/color/releases/tag/v0.3.3
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20 changes: 15 additions & 5 deletions color/src/dynamic.rs
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Expand Up @@ -80,6 +80,20 @@ pub struct UnpremultipliedInterpolator {
}

impl DynamicColor {
/// Construct a `DynamicColor` from a color space tag and its components.
///
/// The the first three components are interpreted according to the color space tag. The
/// fourth component is separate alpha.
#[inline]
#[must_use]
pub const fn new(cs: ColorSpaceTag, components: [f32; 4]) -> Self {
Self {
cs,
flags: Flags::from_missing(Missing::EMPTY),
components,
}
}

/// Convert to `AlphaColor` with a static color space.
///
/// Missing components are interpreted as 0.
Expand All @@ -96,11 +110,7 @@ impl DynamicColor {
#[must_use]
pub fn from_alpha_color<CS: ColorSpace>(color: AlphaColor<CS>) -> Self {
if let Some(cs) = CS::TAG {
Self {
cs,
flags: Flags::default(),
components: color.components,
}
Self::new(cs, color.components)
} else {
Self::from_alpha_color(color.convert::<LinearSrgb>())
}
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