Enum CmapSubtable 

pub enum CmapSubtable<'a> {
    Format0 {
        language: u16,
        glyph_id_array: ReadArray<'a, U8>,
    },
    Format2 {
        language: u16,
        sub_header_keys: ReadArray<'a, U16Be>,
        sub_headers: ReadArray<'a, SubHeader>,
        sub_headers_scope: ReadScope<'a>,
    },
    Format4(CmapSubtableFormat4<'a>),
    Format6 {
        language: u16,
        first_code: u16,
        glyph_id_array: ReadArray<'a, U16Be>,
    },
    Format10 {
        language: u32,
        start_char_code: u32,
        glyph_id_array: ReadArray<'a, U16Be>,
    },
    Format12 {
        language: u32,
        groups: ReadArray<'a, SequentialMapGroup>,
    },
}

Variants

Format0

Fields

language: u16

glyph_id_array: ReadArray<'a, U8>

Format2

Fields

language: u16

sub_header_keys: ReadArray<'a, U16Be>

sub_headers: ReadArray<'a, SubHeader>

sub_headers_scope: ReadScope<'a>

Format4(CmapSubtableFormat4<'a>)

Format6

Fields

language: u16

first_code: u16

glyph_id_array: ReadArray<'a, U16Be>

Format10

Fields

language: u32

start_char_code: u32

glyph_id_array: ReadArray<'a, U16Be>

Format12

Fields

language: u32

groups: ReadArray<'a, SequentialMapGroup>

Implementations

impl<'a> CmapSubtable<'a>

pub fn map_glyph(&self, ch: u32) -> Result<Option<u16>, ParseError>

pub fn to_owned(&self) -> Option<OwnedCmapSubtable>

Returns an owned::CmapSubtable. Will only return None if self is CmapSubtable::Format2 as support for converting from this format is not yet implemented.

pub fn mappings(&self) -> Result<HashMap<u16, u32>, ParseError>

Extract all the mappings from the sub-table.

The returned HashMap maps glyph indexes to char codes. If more than one char code maps to the same glyph, the HashMap will contain the first mapping encountered. Also note that the char code is not necessarily Unicode. It depends on the encoding of the cmap sub-table.

This method primarily exists to support GlyphNames.

pub fn mappings_fn( &self, callback: impl FnMut(u32, u16), ) -> Result<(), ParseError>

Extract all the mappings from the sub-table.

Trait Implementations

impl<'b> ReadBinary for CmapSubtable<'b>

type HostType<'a> = CmapSubtable<'a>

fn read<'a>(ctxt: &mut ReadCtxt<'a>) -> Result<Self::HostType<'a>, ParseError>

impl<'a> WriteBinary<&CmapSubtable<'a>> for CmapSubtable<'a>

type Output = ()

The type of the value returned by write.

fn write<C: WriteContext>( ctxt: &mut C, table: &CmapSubtable<'a>, ) -> Result<(), WriteError>

Write the binary representation of Self to ctxt.