Struct ShapeFeature 

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

An OpenType feature tag-value pair.

The tag is a 4-byte ASCII identifier (e.g. b"liga", b"kern", b"smcp"). A value of 0 disables the feature, 1 enables it, and values >1 select an alternate index for features such as salt.

Fields

tag: [u8; 4]

4-byte ASCII OpenType feature tag.

value: u32

Feature value: 0 = disable, 1 = enable, >1 = alternate index.

Implementations

impl ShapeFeature

pub const LIGA: Self

Standard ligatures.

pub const KERN: Self

Kerning.

pub const SMCP: Self

Small capitals.

pub const CALT: Self

Contextual alternates.

pub const VERT: Self

Vertical forms (substitution of upright CJK glyphs with vertical ones).

pub const VRT2: Self

Vertical rotation (alternative to vert for some CJK contexts).

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

Creates a new feature with an arbitrary value.

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

Creates an enabled feature (value = 1).

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

Creates a disabled feature (value = 0).

Trait Implementations

impl Clone for ShapeFeature

fn clone(&self) -> ShapeFeature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ShapeFeature

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

Formats the value using the given formatter.

impl Hash for ShapeFeature

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 ShapeFeature

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

impl Eq for ShapeFeature

impl StructuralPartialEq for ShapeFeature