Struct FontManager 

pub struct FontManager { /* private fields */ }

Manages font discovery, loading, shaping, and metrics.

Implementations

impl FontManager

pub fn new() -> Self

Create a new FontManager and load system fonts.

When the bundled-fonts feature is enabled, bundled fonts (Carlito, Caladea, Liberation) are loaded as fallbacks.

pub fn load_additional_fonts(&mut self, font_files: &[FontFile])

Load additional font files (user-provided or extracted from DOCX).

These fonts are loaded AFTER system fonts, so they take the highest priority in font resolution (fontdb returns the last-loaded match).

pub fn new_with_fonts(fonts: Vec<(String, Vec<u8>)>) -> Self

Create a FontManager with user-provided fonts (no system font loading).

Each entry is (family_name, font_bytes). This is useful in environments where system fonts are not available, such as WASM.

pub fn resolve_font( &mut self, family: Option<&str>, bold: bool, italic: bool, ) -> Result<FontId>

Resolve a font by family name, bold, and italic flags. Returns a FontId. Uses fallback chain if the requested font is not found.

pub fn metrics(&self, font_id: FontId, size_pt: f64) -> Result<FontMetrics>

Get font metrics at a given size in points.

pub fn shape_text( &self, font_id: FontId, text: &str, size_pt: f64, ) -> Result<ShapedText>

Shape a text string using rustybuzz. Returns glyph IDs and advances.

pub fn font_data(&self, font_id: FontId) -> Result<FontData>

Get font data for PDF embedding.

pub fn all_font_data(&self) -> Vec<FontData>

Get all used font data.

Trait Implementations

impl Default for FontManager

fn default() -> Self

Returns the “default value” for a type.