Struct FontManager 

pub struct FontManager { /* private fields */ }

Deterministic font registry and fallback order.

Implementations

impl FontManager

pub fn register_from( &mut self, resolver: &dyn FontResolver, name: &str, max_bytes: usize, ) -> Result<()>

Resolves and registers one exact font under a caller-supplied byte cap.

pub fn register(&mut self, font: FontAsset) -> Result<()>

Registers a font without replacing an existing name.

Examples found in repository

examples/basic.rs (lines 51-55)

fn example_fonts() -> Result<FontManager, Box<dyn std::error::Error>> {
    let mut fonts = FontManager::default();
    fonts.register(FontAsset::new(
        "NotoSans",
        include_bytes!("assets/NotoSans-Regular.ttf").to_vec(),
        0,
    )?)?;
    Ok(fonts)
}

examples/intermediate.rs (lines 138-142)

fn example_fonts() -> Result<FontManager, Box<dyn std::error::Error>> {
    let mut fonts = FontManager::default();
    fonts.register(FontAsset::new(
        "NotoSans",
        include_bytes!("assets/NotoSans-Regular.ttf").to_vec(),
        0,
    )?)?;
    Ok(fonts)
}

pub fn set_fallback(&mut self, fallback: Vec<String>) -> Result<()>

Replaces the global fallback list after validating every exact name.

pub fn get(&self, name: &str) -> Result<&FontAsset>

Resolves exact name.

pub fn select_for_grapheme<'a>( &'a self, primary: &str, grapheme: &str, ) -> Result<&'a FontAsset>

Selects the first explicit primary/fallback font covering a grapheme.

pub fn digests(&self) -> impl Iterator<Item = (&str, &[u8; 32])>

Returns stable font digests in lexical name order.

pub fn fallback_names(&self) -> impl Iterator<Item = &str>

Returns the explicit fallback order used during shaping.

Trait Implementations

impl Clone for FontManager

fn clone(&self) -> FontManager

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FontManager

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

Formats the value using the given formatter.

impl Default for FontManager

fn default() -> FontManager

Returns the “default value” for a type.