Struct FontFeature 

pub struct FontFeature {
    pub tag: [u8; 4],
    pub value: u32,
}

One OpenType feature and its value. Compose’s TextStyle.fontFeatureSettings entry, CSS’s font-feature-settings entry.

The tag is four bytes rather than a string so that a tag of the wrong length does not compile. Each byte has to be printable ASCII (0x20 to 0x7E); anything else is a protocol error on the Renderer’s side, and the text is drawn without features.

Fields

tag: [u8; 4]

value: u32

Implementations

impl FontFeature

pub const TABULAR_NUMS: Self

Digits of one width, so a number that changes does not move the ones beside it.

pub const PROPORTIONAL_NUMS: Self

Digits of their own widths, as a text face usually sets them.

pub const NO_LIGATURES: Self

Standard ligatures turned off, so fi stays two letters.

pub const SLASHED_ZERO: Self

A zero with a slash or a dot through it, where the font has one.

pub const fn new(tag: &[u8; 4], value: u32) -> Self

The feature tag with value: 1 turns most features on and 0 off; an alternate feature takes the number of the alternate.

pub const fn to_bytes(self) -> [u8; 8]

The record as it travels.

Trait Implementations

impl Clone for FontFeature

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 FontFeature

impl Debug for FontFeature

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

Formats the value using the given formatter.

impl Eq for FontFeature

impl Hash for FontFeature

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 FontFeature

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for FontFeature