Struct FontEncoding 

pub struct FontEncoding { /* private fields */ }

An encoding table that may be a standard encoding modified by a Differences array.

This represents the /Encoding entry in a PDF font dictionary, which can be:

• A name referring to a standard encoding (e.g., /WinAnsiEncoding)
• A dictionary with /BaseEncoding + /Differences array

Implementations

impl FontEncoding

pub fn from_standard(encoding: StandardEncoding) -> Self

Create a FontEncoding from a standard encoding.

pub fn from_standard_with_differences( encoding: StandardEncoding, differences: &[(u8, char)], ) -> Self

Create a FontEncoding from a standard encoding with Differences applied.

The differences slice contains pairs of (code, character) that override the base encoding. This matches the PDF /Differences array format: [code1 /name1 /name2 ... codeN /nameN ...] where each code starts a run of consecutive overrides.

pub fn from_table(table: [Option<char>; 256]) -> Self

Create a FontEncoding from a custom table (256 entries).

pub fn apply_differences(&mut self, differences: &[(u8, char)])

Apply Differences array overrides to this encoding.

pub fn decode(&self, code: u8) -> Option<char>

Decode a single byte code to a Unicode character.

pub fn decode_bytes(&self, bytes: &[u8]) -> String

Decode a byte string into a Unicode string.

Bytes with no mapping are replaced with U+FFFD (replacement character).

Trait Implementations

impl Clone for FontEncoding

fn clone(&self) -> FontEncoding

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FontEncoding

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.