Struct UnicodeEncoder 

pub struct UnicodeEncoder { /* private fields */ }

Unicode encoder for PDF text strings.

Converts Unicode text to PDF string format for different encodings.

Implementations

impl UnicodeEncoder

pub fn new() -> Self

Create a new Unicode encoder.

pub fn encode_identity_h( &mut self, text: &str, glyph_lookup: impl Fn(u32) -> Option<u16>, ) -> String

Encode a Unicode string to Identity-H format (hex string of glyph IDs).

Arguments

• text - Unicode text to encode
• glyph_lookup - Function to convert Unicode codepoint to glyph ID

Returns

Hex-encoded string suitable for Tj/TJ operators, e.g., “<00410042>”

pub fn encode_char_identity_h(&self, glyph_id: u16) -> String

Encode a single character to Identity-H format.

pub fn encode_literal(text: &str) -> String

Encode text as PDF literal string (for WinAnsi/MacRoman encoding).

Characters outside the encoding are replaced with ‘?’.

pub fn encode_utf16be(text: &str) -> String

Encode text as PDF hex string for UTF-16BE.

Used for metadata strings and bookmarks that need full Unicode.

pub fn encode_text(text: &str) -> String

Encode text as PDF literal string if ASCII, otherwise as UTF-16BE hex.

This is the recommended approach for general PDF strings.

pub fn clear_cache(&mut self)

Clear the glyph cache.

pub fn cache_size(&self) -> usize

Get cache statistics.

Trait Implementations

impl Debug for UnicodeEncoder

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

Formats the value using the given formatter.

impl Default for UnicodeEncoder

fn default() -> Self

Returns the “default value” for a type.