Struct FontFace

pub struct FontFace { /* private fields */ }

A font face that materialises glyphs on demand.

Implementations

impl FontFace

pub fn from_bytes(data: Arc<Vec<u8>>, index: u32) -> Option<Self>

Parse the face at index of data, keeping the bytes alive for the outline loads that follow. None when the face does not parse or declares a zero em square.

pub fn units_per_em(&self) -> f32

pub fn data(&self) -> &Arc<Vec<u8>>

The font file the face was parsed from; HarfBuzz shapes against it.

pub fn face_index(&self) -> u32

The face’s index in its file (0 unless the file is a collection).

pub fn scale_factor(&self, px: f32) -> f32

pub fn lookup_glyph_index(&self, ch: char) -> u16

Glyph index for ch, or 0 when the face has no glyph for it.

pub fn horizontal_line_metrics(&self, px: f32) -> Option<LineMetrics>

pub fn metrics(&self, ch: char, px: f32) -> Metrics

pub fn metrics_indexed(&self, id: u16, px: f32) -> Metrics

pub fn rasterize_indexed(&self, id: u16, px: f32) -> (Metrics, Vec<u8>)

Coverage bitmap for id at px, row-major from the top-left corner, alongside its placement.

pub fn color_glyph(&self, id: u16) -> Option<Arc<ColorGlyph>>

The colour image glyph id is drawn with instead of an outline (an emoji in a CBDT or sbix font), decoded once from the face’s largest strike.

Trait Implementations

impl Debug for FontFace

The glyph caches are left out: formatting must not block on them.

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

Formats the value using the given formatter.