Struct LinearRgba 

pub struct LinearRgba { /* private fields */ }

A straight-alpha color in linear light. RGB are linear (already gamma-decoded) and may exceed 1.0 (HDR over-bright); alpha is coverage in [0, 1] (never gamma-encoded). The blur convolution runs in linear light, so a tint authored in sRGB must be decoded first — that is exactly what Self::from_srgb_unmultiplied does, so callers never hand the backend gamma-encoded tint values (DESIGN §4.2).

Fields are private so the “already linear” invariant is only ever established through a named constructor (matching the other newtypes), and both constructors are total: non-finite channels (NaN/±∞) are scrubbed to 0.0 so a malformed tint can never reach the GPU as undebuggable garbage.

Implementations

impl LinearRgba

pub fn new(r: f32, g: f32, b: f32, a: f32) -> Self

Build from channels that are already linear. Non-finite channels are scrubbed to 0.0 and alpha is clamped to [0, 1]; RGB keep their (possibly > 1, HDR) magnitude.

pub fn from_srgb_unmultiplied(rgba: [u8; 4]) -> Self

Decode straight-alpha sRGB bytes to linear light: RGB through the sRGB EOTF, alpha linearly. This is the gamma decode the linear-space convolution requires. The result is finite by construction (u8 / 255 and the EOTF never produce NaN/∞).

pub fn r(self) -> f32

Linear red.

pub fn g(self) -> f32

Linear green.

pub fn b(self) -> f32

Linear blue.

pub fn a(self) -> f32

Film opacity / coverage, in [0, 1].

Trait Implementations

impl Clone for LinearRgba

fn clone(&self) -> LinearRgba

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LinearRgba

impl Debug for LinearRgba

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

Formats the value using the given formatter.

impl PartialEq for LinearRgba

fn eq(&self, other: &LinearRgba) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for LinearRgba