Struct Color 

pub struct Color {
    pub red: u8,
    pub green: u8,
    pub blue: u8,
    pub alpha: u8,
}

A colour with 8 bits per channel.

The chart pipeline packs colours into a single u32 (0xRRGGBBAA) before they reach the GPU, so the type keeps the four channels as separate bytes and does the packing once, at upload time.

Fields

red: u8

The red channel.

green: u8

The green channel.

blue: u8

The blue channel.

alpha: u8

The alpha channel, where 255 is fully opaque.

Implementations

impl Color

Inherent implementation of Color.

pub fn rgb(red: u8, green: u8, blue: u8) -> Self

Returns an opaque colour from its red, green, and blue channels.

Arguments

• u8 - A u8 parameter.

pub fn rgba(red: u8, green: u8, blue: u8, alpha: u8) -> Self

Returns a colour from its red, green, blue, and alpha channels.

Arguments

• u8 - A u8 parameter.

pub fn from_u32(packed: u32) -> Self

Returns a colour from a packed 0xRRGGBBAA value.

Arguments

• u32 - A 32-bit unsigned integer (u32).

pub fn to_u32(self) -> u32

Returns the colour packed as 0xRRGGBBAA.

Returns

• u32 - A 32-bit unsigned integer.

pub fn to_css(self) -> String

Returns the colour as a CSS rgba() string.

Returns

• String - A String value.

pub fn lerp(self, other: Self, amount: f64) -> Self

Returns the colour that lies between two colours.

The channels are mixed one by one, which is what the ramp of a visual map does: the middle of the ramp is the middle of its two ends.

Arguments

• f64 - The opposite endpoint of the interpolation.
• Self - The opposite endpoint of the interpolation.

pub fn parse(input: &str) -> Option<Self>

Parses a CSS colour string.

The accepted forms are the ones ECharts accepts: #rgb, #rgba, #rrggbb, #rrggbbaa, rgb(), rgba(), hsl(), hsla(), transparent, and the CSS named colours. Returns None when the string is not a colour.

Arguments

• &str - Shared reference to a str.

Returns

• Option<Self> - Some(...) on success, None otherwise.

pub fn with_alpha(self, alpha: u8) -> Self

Returns the colour with its alpha replaced.

Arguments

• u8 - A u8 parameter.

pub fn mix(self, other: Self, ratio: f64) -> Self

Returns the colour mixed with another one.

ratio is the weight of other: 0.0 returns this colour unchanged, 1.0 returns other.

Arguments

• f64 - A 64-bit float (f64).
• Self - A Self parameter.

pub fn lighten(self, ratio: f64) -> Self

Returns the colour brightened towards white.

Arguments

• f64 - A 64-bit float (f64).

pub fn darken(self, ratio: f64) -> Self

Returns the colour darkened towards black.

Arguments

• f64 - A 64-bit float (f64).

impl Color

pub fn get_red(&self) -> u8

pub fn get_mut_red(&mut self) -> &mut u8

pub fn set_red(&mut self, val: u8) -> &mut Self

pub fn get_green(&self) -> u8

pub fn get_mut_green(&mut self) -> &mut u8

pub fn set_green(&mut self, val: u8) -> &mut Self

pub fn get_blue(&self) -> u8

pub fn get_mut_blue(&mut self) -> &mut u8

pub fn set_blue(&mut self, val: u8) -> &mut Self

pub fn get_alpha(&self) -> u8

pub fn get_mut_alpha(&mut self) -> &mut u8

pub fn set_alpha(&mut self, val: u8) -> &mut Self

Trait Implementations

impl Clone for Color

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Color

impl Debug for Color

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

Formats the value using the given formatter.

impl Default for Color

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Color

impl Hash for Color

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Color

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Color