Struct ttf_parser::cmap::Subtable[−][src]

pub struct Subtable<'a> { /* fields omitted */ }

A character encoding subtable.

Implementations

impl<'a> Subtable<'a>[src]

pub fn platform_id(&self) -> PlatformId[src]

Returns encoding's platform.

pub fn encoding_id(&self) -> u16[src]

Returns encoding ID.

pub fn format(&self) -> Format[src]

Returns encoding's format.

pub fn is_unicode(&self) -> bool[src]

Checks that the current encoding is Unicode compatible.

pub fn glyph_index(&self, c: u32) -> Option<GlyphId>[src]

Maps a character to a glyph ID.

This is a low-level method and unlike Face::glyph_index it doesn't check that the current encoding is Unicode. It simply maps a u32 codepoint number to a glyph ID.

Returns None:

  • when glyph ID is 0.
  • when format is MixedCoverage, since it's not supported.
  • when format is UnicodeVariationSequences. Use glyph_variation_index instead.

pub fn glyph_variation_index(
    &self,
    c: char,
    variation: char
) -> Option<GlyphVariationResult>[src]

Resolves a variation of a glyph ID from two code points.

Returns None:

  • when glyph ID is 0.
  • when format is not UnicodeVariationSequences.

pub fn codepoints<F: FnMut(u32)>(&self, f: F)[src]

Calls f for all codepoints contained in this subtable.

This is a low-level method and it doesn't check that the current encoding is Unicode. It simply calls the function f for all u32 codepoints that are present in this subtable.

Note that this may list codepoints for which glyph_index still returns None because this method finds all codepoints which were defined in this subtable. The subtable may still map them to glyph ID 0.

Returns without doing anything:

  • when format is MixedCoverage, since it's not supported.
  • when format is UnicodeVariationSequences, since it's not supported.

Trait Implementations

impl<'a> Debug for Subtable<'a>[src]

Auto Trait Implementations

impl<'a> RefUnwindSafe for Subtable<'a>[src]

impl<'a> Send for Subtable<'a>[src]

impl<'a> Sync for Subtable<'a>[src]

impl<'a> Unpin for Subtable<'a>[src]

impl<'a> UnwindSafe for Subtable<'a>[src]

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized, [src]

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, [src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.