Struct fonts::platform::freetype::font::PlatformFont

pub struct PlatformFont {
    font_data: Arc<Vec<u8>>,
    face: ReentrantMutex<FT_Face>,
    requested_face_size: Au,
    actual_face_size: Au,
    can_do_fast_shaping: bool,
}

Fields

font_data: Arc<Vec<u8>>

The font data itself, which must stay valid for the lifetime of the platform FT_Face.

face: ReentrantMutex<FT_Face>

requested_face_size: Au

actual_face_size: Au

can_do_fast_shaping: bool

Implementations

impl PlatformFont

fn unscalable_font_metrics_scale(&self) -> f64

Find the scale to use for metrics of unscalable fonts. Unscalable fonts, those using bitmap glyphs, are scaled after glyph rasterization. In order for metrics to match the final scaled font, we need to scale them based on the final size and the actual font size.

Trait Implementations

impl Debug for PlatformFont

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

Formats the value using the given formatter.

impl Drop for PlatformFont

fn drop(&mut self)

Executes the destructor for this type.

impl PlatformFontMethods for PlatformFont

fn new_from_data( _font_identifier: FontIdentifier, data: Arc<Vec<u8>>, face_index: u32, requested_size: Option<Au>, ) -> Result<PlatformFont, &'static str>

fn descriptor(&self) -> FontTemplateDescriptor

Get a FontTemplateDescriptor from a PlatformFont. This is used to get descriptors for web fonts.

fn glyph_index(&self, codepoint: char) -> Option<GlyphId>

fn glyph_h_kerning( &self, first_glyph: GlyphId, second_glyph: GlyphId, ) -> FractionalPixel

fn can_do_fast_shaping(&self) -> bool

Can this font do basic horizontal LTR shaping without Harfbuzz?

fn glyph_h_advance(&self, glyph: GlyphId) -> Option<FractionalPixel>

fn metrics(&self) -> FontMetrics

fn table_for_tag(&self, tag: FontTableTag) -> Option<FontTable>

fn typographic_bounds(&self, glyph_id: GlyphId) -> Rect<f32>

fn webrender_font_instance_flags(&self) -> FontInstanceFlags

Get the necessary FontInstanceFlags` for this font.

fn new_from_template( template: FontTemplateRef, pt_size: Option<Au>, ) -> Result<PlatformFont, &'static str>

impl Send for PlatformFont

impl Sync for PlatformFont