Struct FontFeature 

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

A single OpenType feature tag + value.

Tags are 4-byte ASCII identifiers (e.g., b"liga", b"kern", b"smcp"). Value 0 disables the feature, 1 enables it, higher values select alternates.

Fields

tag: [u8; 4]

OpenType tag (4 ASCII bytes, e.g., *b"liga").

value: u32

Feature value (0 = off, 1 = on, >1 = alternate selection).

Implementations

impl FontFeature

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

Create a new feature from a tag and value.

pub const fn enabled(tag: [u8; 4]) -> Self

Create an enabled feature from a tag.

pub const fn disabled(tag: [u8; 4]) -> Self

Create a disabled feature from a tag.

Trait Implementations

impl Clone for FontFeature

fn clone(&self) -> FontFeature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FontFeature

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

Formats the value using the given formatter.

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: &FontFeature) -> 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 Copy for FontFeature

impl Eq for FontFeature

impl StructuralPartialEq for FontFeature