Struct ab_glyph::FontArc

pub struct FontArc(_);

Font implementor that wraps another concrete Font + 'static type storing in an Arc.

Provides convenient type erasure & cheap clones (particularly for FontVec).

Example

use ab_glyph::{Font, FontArc};

let font = FontArc::try_from_slice(include_bytes!("../../dev/fonts/Exo2-Light.otf"))?;

assert_eq!(font.glyph_id('s'), ab_glyph::GlyphId(56));

Implementations

impl FontArc

pub fn new<F: Font + Send + Sync + 'static>(font: F) -> Self

Example

let font_arc = FontArc::new(font_vec);

pub fn try_from_vec(data: Vec<u8>) -> Result<Self, InvalidFont>

Creates an FontArc from owned data.

Example

let font = FontArc::try_from_vec(owned_font_data)?;

pub fn try_from_slice(data: &'static [u8]) -> Result<Self, InvalidFont>

Creates an FontArc from a byte-slice.

Example

let font = FontArc::try_from_slice(include_bytes!("../../dev/fonts/Exo2-Light.otf"))?;

Trait Implementations

impl Clone for FontArc

fn clone(&self) -> FontArc

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for FontArc

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

Formats the value using the given formatter.

impl Font for FontArc

fn units_per_em(&self) -> Option<f32>

Get the size of the font unit

fn ascent_unscaled(&self) -> f32

Unscaled glyph ascent.

fn descent_unscaled(&self) -> f32

Unscaled glyph descent.

fn line_gap_unscaled(&self) -> f32

Unscaled line gap.

fn glyph_id(&self, c: char) -> GlyphId

Lookup a GlyphId matching a given char.

fn h_advance_unscaled(&self, id: GlyphId) -> f32

Unscaled horizontal advance for a given glyph id.

fn h_side_bearing_unscaled(&self, id: GlyphId) -> f32

Unscaled horizontal side bearing for a given glyph id.

fn v_advance_unscaled(&self, id: GlyphId) -> f32

Unscaled vertical advance for a given glyph id.

fn v_side_bearing_unscaled(&self, id: GlyphId) -> f32

Unscaled vertical side bearing for a given glyph id.

fn kern_unscaled(&self, first: GlyphId, second: GlyphId) -> f32

Returns additional unscaled kerning to apply for a particular pair of glyph ids.

fn outline(&self, glyph: GlyphId) -> Option<Outline>

Compute unscaled glyph outline curves & bounding box.

fn glyph_count(&self) -> usize

The number of glyphs present in this font. Glyph identifiers for this font will always be in the range 0..self.glyph_count()

fn codepoint_ids(&self) -> CodepointIdIter<'_>

Returns an iterator of all distinct (GlyphId, char) pairs. Not ordered.

fn glyph_raster_image(&self, id: GlyphId, size: u16) -> Option<GlyphImage<'_>>

Returns a pre-rendered image of the glyph.

fn height_unscaled(&self) -> f32

Unscaled height ascent - descent.

fn glyph_bounds(&self, glyph: &Glyph) -> Rect where
    Self: Sized, 

Returns the layout bounds of this glyph. These are different to the outline px_bounds().

fn outline_glyph(&self, glyph: Glyph) -> Option<OutlinedGlyph> where
    Self: Sized, 

Compute glyph outline ready for drawing.

fn as_scaled<S: Into<PxScale>>(&self, scale: S) -> PxScaleFont<&Self> where
    Self: Sized, 

Construct a PxScaleFontRef by associating with the given pixel scale.

fn into_scaled<S: Into<PxScale>>(self, scale: S) -> PxScaleFont<Self> where
    Self: Sized, 

Move into a PxScaleFont associated with the given pixel scale.

impl From<Arc<dyn Font + 'static + Sync + Send>> for FontArc

fn from(font: Arc<dyn Font + Send + Sync + 'static>) -> Self

Performs the conversion.

impl From<FontRef<'static>> for FontArc

fn from(font: FontRef<'static>) -> Self

Performs the conversion.

impl From<FontVec> for FontArc

fn from(font: FontVec) -> Self

Performs the conversion.