Struct PathLoader 

pub struct PathLoader;

A FontLoader that parses font data from a byte slice.

It is designed to be used in conjunction with a mechanism that reads font files from paths into memory. This loader simply handles the parsing aspect.

Implementations

impl PathLoader

pub fn new() -> Self

Creates a new PathLoader.

pub fn load_from_path( &self, path: &Path, font_index: usize, ) -> Result<FontRef, LayoutError>

Read a font from disk and parse via the lazy-LocaGlyf path. Convenience wrapper for callers that have a path but no Arc<FontBytes> yet — uses a heap read (Owned) since a loose path won’t go through the fontconfig dedup cache.

pub fn load_font_shared( &self, font_bytes: Arc<FontBytes>, font_index: usize, ) -> Result<FontRef, LayoutError>

Lazy-friendly loader: takes an Arc<FontBytes> (typically from rust_fontconfig::FcFontCache::get_font_bytes) and uses the ParsedFont::from_bytes_shared constructor so LocaGlyf::load is deferred until the first glyph decode.

This is the only loader on the production path — load_fonts_from_disk calls this via the closure passed into FontManager::load_missing_for_chains. Fonts that never get rasterized (common — every face of a .ttc gets a FontId, but pages only hit a couple of them) skip their per-face loca+glyf materialisation entirely; with FontBytes::Mmapped the unread pages also never count toward RSS.

Trait Implementations

impl Clone for PathLoader

fn clone(&self) -> PathLoader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PathLoader

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

Formats the value using the given formatter.

impl Default for PathLoader

fn default() -> PathLoader

Returns the “default value” for a type.