Struct FeatureVarsStorage 

struct FeatureVarsStorage {
    gsub: AtomicU32,
    gpos: AtomicU32,
    has_lookup_variations: AtomicBool,
}

Lazy atomic storage for feature variation selections.

We don’t want to load the GSUB and GPOS tables unless explicitly requested.

Fields

gsub: AtomicU32

gpos: AtomicU32

has_lookup_variations: AtomicBool

Written before the indices, so it is current once they are.

Implementations

impl FeatureVarsStorage

const UNCHECKED: u32 = u32::MAX

Nothing has read the tables yet.

const ABSENT: u32

The tables were read and selected nothing.

fn new() -> Self

fn load( &self, font: &SharedFont, coords: &[NormalizedCoord], ) -> SelectedFeatureVariations

fn decode(value: u32) -> Option<u32>

Returns the index a stored word holds, if it holds one.

fn encode(index: Option<u32>) -> u32

Returns the word that stores a selection.

Trait Implementations

impl Default for FeatureVarsStorage

fn default() -> Self

Returns the “default value” for a type.