Struct ReverseChainSingleSubstFormat1 

pub struct ReverseChainSingleSubstFormat1<'a> {
    data: FontData<'a>,
}

Reverse Chaining Contextual Single Substitution Format 1

Fields

data: FontData<'a>

Implementations

impl<'a> ReverseChainSingleSubstFormat1<'a>

pub const MIN_SIZE: usize

pub fn resolve_offset<O: Offset, R: FontRead<'a>>( &self, offset: O, ) -> Result<R, ReadError>

Resolve the provided offset from the start of this table.

pub fn offset_data(&self) -> FontData<'a>

Return a reference to this table’s raw data.

We use this in the compile crate to resolve offsets.

pub fn shape(&self) -> &Self

👎Deprecated: just use the base type directly

Return a reference to the table’s ‘Shape’ struct.

This is a low level implementation detail, but it can be useful in some cases where you want to know things about a table’s layout, such as the byte offsets of specific fields.

pub fn subst_format(&self) -> u16

Format identifier: format = 1

pub fn coverage_offset(&self) -> Offset16

Offset to Coverage table, from beginning of substitution subtable.

pub fn coverage(&self) -> Result<CoverageTable<'a>, ReadError>

Attempt to resolve coverage_offset.

pub fn backtrack_glyph_count(&self) -> u16

Number of glyphs in the backtrack sequence.

pub fn backtrack_coverage_offsets(&self) -> &'a [BigEndian<Offset16>]

Array of offsets to coverage tables in backtrack sequence, in glyph sequence order.

pub fn backtrack_coverages( &self, ) -> ArrayOfOffsets<'a, CoverageTable<'a>, Offset16>

A dynamically resolving wrapper for backtrack_coverage_offsets.

pub fn lookahead_glyph_count(&self) -> u16

Number of glyphs in lookahead sequence.

pub fn lookahead_coverage_offsets(&self) -> &'a [BigEndian<Offset16>]

Array of offsets to coverage tables in lookahead sequence, in glyph sequence order.

pub fn lookahead_coverages( &self, ) -> ArrayOfOffsets<'a, CoverageTable<'a>, Offset16>

A dynamically resolving wrapper for lookahead_coverage_offsets.

pub fn glyph_count(&self) -> u16

Number of glyph IDs in the substituteGlyphIDs array.

pub fn substitute_glyph_ids(&self) -> &'a [BigEndian<GlyphId16>]

Array of substitute glyph IDs — ordered by Coverage index.

pub fn subst_format_byte_range(&self) -> Range<usize>

pub fn coverage_offset_byte_range(&self) -> Range<usize>

pub fn backtrack_glyph_count_byte_range(&self) -> Range<usize>

pub fn backtrack_coverage_offsets_byte_range(&self) -> Range<usize>

pub fn lookahead_glyph_count_byte_range(&self) -> Range<usize>

pub fn lookahead_coverage_offsets_byte_range(&self) -> Range<usize>

pub fn glyph_count_byte_range(&self) -> Range<usize>

pub fn substitute_glyph_ids_byte_range(&self) -> Range<usize>

Trait Implementations

impl<'a> Clone for ReverseChainSingleSubstFormat1<'a>

fn clone(&self) -> ReverseChainSingleSubstFormat1<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> FontRead<'a> for ReverseChainSingleSubstFormat1<'a>

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

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

impl Format<u16> for ReverseChainSingleSubstFormat1<'_>

const FORMAT: u16 = 1

The format value for this table.

impl GlyphClosure for ReverseChainSingleSubstFormat1<'_>

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 Intersect for ReverseChainSingleSubstFormat1<'_>

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

impl<'a> MinByteRange<'a> for ReverseChainSingleSubstFormat1<'a>

fn min_byte_range(&self) -> Range<usize>

fn min_table_bytes(&self) -> &'a [u8]