Struct RgbaUnit 

pub struct RgbaUnit {
    pub r: f32,
    pub g: f32,
    pub b: f32,
    pub a: f32,
}

A straight-alpha RGBA pixel as floats in [0, 1].

Conversions to/from the framebuffer 0xAARRGGBB format use the helpers at the bottom of this file (to_unit / from_unit).

Fields

r: f32

Red channel, [0, 1].

g: f32

Green channel, [0, 1].

b: f32

Blue channel, [0, 1].

a: f32

Alpha channel, [0, 1].

Implementations

impl RgbaUnit

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

Construct a pixel from raw float components (clamped to [0, 1]).

pub fn from_bytes(r: u8, g: u8, b: u8, a: u8) -> Self

Construct from an unsigned-byte (r, g, b, a) tuple.

pub fn to_bytes(self) -> (u8, u8, u8, u8)

Round to nearest (r, g, b, a) bytes.

pub fn premultiply(self) -> Self

Multiply RGB by alpha — produces premultiplied form for fast bulk maths.

pub fn unpremultiply(self) -> Self

Inverse of premultiply; safe when a == 0 (returns transparent black rather than NaN).

Trait Implementations

impl Clone for RgbaUnit

fn clone(&self) -> RgbaUnit

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RgbaUnit

impl Debug for RgbaUnit

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

Formats the value using the given formatter.

impl PartialEq for RgbaUnit

fn eq(&self, other: &RgbaUnit) -> 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 RgbaUnit