Struct allsorts_no_std::cff::CFF[−][src]

pub struct CFF<'a> {
    pub header: Header,
    pub name_index: Index<'a>,
    pub string_index: MaybeOwnedIndex<'a>,
    pub global_subr_index: Index<'a>,
    pub fonts: Vec<Font<'a>>,
}

Top level representation of a CFF font file, typically read from a CFF OpenType table.

Refer to Technical Note #5176

Fields

header: Headername_index: Index<'a>string_index: MaybeOwnedIndex<'a>global_subr_index: Index<'a>fonts: Vec<Font<'a>>

Implementations

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

pub fn read_string(&self, sid: u16) -> Result<String, ParseError>[src]

Read a string with the given SID from the String INDEX

pub fn subset(
    &self,
    glyph_ids: &[u16],
    convert_cff_to_cid_if_more_than_255_glyphs: bool
) -> Result<(Self, Vec<u16>), ParseError>[src]

The Vec<u16> in the output is a mapping from new to old glyph id.

glpyh_ids contains the ids of the glyphs to retain. When subsetting a Type 1 CFF font and retaining more than 255 glyphs the convert_cff_to_cid_if_more_than_255_glyphs argument controls whether the Type 1 font is converted to a CID keyed font in the process. The primary motivation for this is broader compatibility, especially if the subset font is embedded in a PDF.

Known Limitations

Currently the subsetting process does not produce the smallest possible output font. There are various parts of the source font that are copied to the output font as-is. Specifically the subsetting process does not subset the String INDEX, or the Local or Global subroutines.

Subsetting the String INDEX requires updating all String IDs (SID) in the font so that they point at their new position in the String INDEX. Subsetting the subroutines requires parsing the CharStrings, which describe the glyph outlines. The CharStrings format is non-trivial so this has been left for now.

Trait Implementations

impl<'a> Clone for CFF<'a>[src]

impl<'a> ReadBinary<'a> for CFF<'a>[src]

type HostType = Self

impl<'a> WriteBinary<&'_ CFF<'a>> for CFF<'a>[src]

type Output = ()

The type of the value returned by write.

Auto Trait Implementations

impl<'a> RefUnwindSafe for CFF<'a>

impl<'a> Send for CFF<'a>

impl<'a> Sync for CFF<'a>

impl<'a> Unpin for CFF<'a>

impl<'a> UnwindSafe for CFF<'a>

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<'a, T> ReadBinaryDep<'a> for T where
    T: ReadBinary<'a>, [src]

type Args = ()

type HostType = <T as ReadBinary<'a>>::HostType

impl<T> ToOwned for T where
    T: Clone, [src]

type Owned = T

The resulting type after obtaining ownership.

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.

impl<T, HostType> WriteBinaryDep<HostType> for T where
    T: WriteBinary<HostType>, [src]

type Args = ()

The type of the arguments supplied to write_dep.

type Output = <T as WriteBinary<HostType>>::Output

The type of the value returned by write_dep.