Enum PositionLookup

pub enum PositionLookup<'a> {
    Single(Lookup<'a, SinglePos<'a>>),
    Pair(Lookup<'a, PairPos<'a>>),
    Cursive(Lookup<'a, CursivePosFormat1<'a>>),
    MarkToBase(Lookup<'a, MarkBasePosFormat1<'a>>),
    MarkToLig(Lookup<'a, MarkLigPosFormat1<'a>>),
    MarkToMark(Lookup<'a, MarkMarkPosFormat1<'a>>),
    Contextual(Lookup<'a, PositionSequenceContext<'a>>),
    ChainContextual(Lookup<'a, PositionChainContext<'a>>),
    Extension(Lookup<'a, ExtensionSubtable<'a>>),
}

A GPOS Lookup subtable.

Variants

Single(Lookup<'a, SinglePos<'a>>)

Pair(Lookup<'a, PairPos<'a>>)

Cursive(Lookup<'a, CursivePosFormat1<'a>>)

MarkToBase(Lookup<'a, MarkBasePosFormat1<'a>>)

MarkToLig(Lookup<'a, MarkLigPosFormat1<'a>>)

MarkToMark(Lookup<'a, MarkMarkPosFormat1<'a>>)

Contextual(Lookup<'a, PositionSequenceContext<'a>>)

ChainContextual(Lookup<'a, PositionChainContext<'a>>)

Extension(Lookup<'a, ExtensionSubtable<'a>>)

Implementations

impl<'a> PositionLookup<'a>

pub fn lookup_flag(&self) -> LookupFlag

pub fn lookup_type(&self) -> u16

Different enumerations for GSUB and GPOS

pub fn mark_filtering_set(&self) -> Option<u16>

pub fn subtables(&self) -> Result<PositionSubtables<'a>, ReadError>

Return the subtables for this lookup.

This method handles both extension and non-extension lookups, and saves the caller needing to dig into the PositionLookup enum itself.

Trait Implementations

impl<'a> FontRead<'a> for PositionLookup<'a>

fn read(bytes: FontData<'a>) -> Result<Self, ReadError>

Read an instance of Self from the provided data, performing validation.