Enum Subtables

pub enum Subtables<'a, T: FontRead<'a>, Ext: ExtensionLookup<'a, T>> {
    Subtable(ArrayOfOffsets<'a, T>),
    Extension(ArrayOfOffsets<'a, Ext>),
}

an array of subtables, maybe behind extension lookups

This is used to implement more ergonomic access to lookup subtables for GPOS & GSUB lookup tables.

Variants

Subtable(ArrayOfOffsets<'a, T>)

Extension(ArrayOfOffsets<'a, Ext>)

Implementations

impl<'a, T: FontRead<'a> + 'a, Ext: ExtensionLookup<'a, T> + 'a> Subtables<'a, T, Ext>

pub(crate) fn new( offsets: &'a [BigEndian<Offset16>], data: FontData<'a>, ) -> Self

create a new subtables array given offsets to non-extension subtables

pub(crate) fn new_ext( offsets: &'a [BigEndian<Offset16>], data: FontData<'a>, ) -> Self

create a new subtables array given offsets to extension subtables

pub fn len(&self) -> usize

The number of subtables in this collection

pub fn is_empty(&self) -> bool

pub fn get(&self, idx: usize) -> Result<T, ReadError>

Return the subtable at the given index

pub fn iter(&self) -> impl Iterator<Item = Result<T, ReadError>> + 'a

Return an iterator over all the subtables in the collection

Trait Implementations

impl<'a, T: FontRead<'a> + GlyphClosure + 'a, Ext: ExtensionLookup<'a, T> + 'a> GlyphClosure for Subtables<'a, T, Ext>

fn closure_glyphs( &self, ctx: &mut ClosureCtx<'_>, lookup_list: &SubstitutionLookupList<'_>, lookup_index: u16, ) -> Result<(), ReadError>

Update the set of glyphs with any glyphs reachable via substitution.

fn may_have_non_1to1(&self) -> Result<bool, ReadError>

impl<'a, T, Ext> Intersect for Subtables<'a, T, Ext>

where T: Intersect + FontRead<'a> + 'a, Ext: ExtensionLookup<'a, T> + 'a,

fn intersects(&self, glyph_set: &IntSet<GlyphId>) -> Result<bool, ReadError>

impl<'a, T, Ext> LookupClosure for Subtables<'a, T, Ext>

where T: LookupClosure + Intersect + FontRead<'a> + 'a, Ext: ExtensionLookup<'a, T> + 'a,

fn closure_lookups( &self, c: &mut LookupClosureCtx<'_>, arg: u16, ) -> Result<(), ReadError>