Enum allsorts::layout::ReverseChainSingleSubst

pub enum ReverseChainSingleSubst {
    Format1 {
        coverage: Rc<Coverage>,
        backtrack_coverages: Vec<Rc<Coverage>>,
        lookahead_coverages: Vec<Rc<Coverage>>,
        substitute_glyphs: Vec<u16>,
    },
}

GSUB Lookup Type 8 Subtable Formats

Variants

Format1

Fields

coverage: Rc<Coverage>

Coverage table for the single input glyph

backtrack_coverages: Vec<Rc<Coverage>>

Array of backtrack sequence coverages, ordered by glyph sequence

lookahead_coverages: Vec<Rc<Coverage>>

Array of lookahead sequence coverages, ordered by glyph sequence

substitute_glyphs: Vec<u16>

Array of substitute glyphs, ordered by coverage index

Format 1

Implementations

impl ReverseChainSingleSubst

pub fn apply_glyph(
    &self,
    glyph: u16,
    f: impl Fn(&MatchContext<'_>) -> bool
) -> Result<Option<u16>, ParseError>

Apply the substitution to the supplied glyph

Trait Implementations

impl<'a> ReadBinaryDep<'a> for ReverseChainSingleSubst

fn read_dep(
    ctxt: &mut ReadCtxt<'a>,
    cache: Self::Args
) -> Result<Self, ParseError>

Parse a GSUB Lookup Type 8 Subtable from the given read context

type HostType = ReverseChainSingleSubst

type Args = Rc<LayoutCacheData<GSUB>>