Struct NoopTextSystem 

pub struct NoopTextSystem;

Implementations

impl NoopTextSystem

pub fn new() -> NoopTextSystem

Trait Implementations

impl PlatformTextSystem for NoopTextSystem

fn add_fonts(&self, _fonts: Vec<Cow<'static, [u8]>>) -> Result<(), Error>

fn all_font_names(&self) -> Vec<String>

fn font_id(&self, _descriptor: &Font) -> Result<FontId, Error>

fn font_metrics(&self, _font_id: FontId) -> FontMetrics

fn typographic_bounds( &self, _font_id: FontId, _glyph_id: GlyphId, ) -> Result<Bounds<f32>, Error>

fn advance( &self, _font_id: FontId, glyph_id: GlyphId, ) -> Result<Size<f32>, Error>

fn glyph_for_char(&self, _font_id: FontId, ch: char) -> Option<GlyphId>

fn glyph_raster_bounds( &self, _params: &RenderGlyphParams, ) -> Result<Bounds<DevicePixels>, Error>

fn rasterize_glyph( &self, _params: &RenderGlyphParams, raster_bounds: Bounds<DevicePixels>, ) -> Result<(Size<DevicePixels>, Vec<u8>), Error>

fn layout_line( &self, text: &str, font_size: Pixels, _runs: &[FontRun], ) -> LineLayout

fn clear_glyph_raster_cache(&self)

Drop platform-side glyph rasterization data associated with the core raster-bounds cache.

fn prewarm_fonts(&self, _font_ids: &[FontId])

Prewarm any system font caches needed to shape text.

fn set_missing_glyph_sink(&self, _sink: Arc<dyn MissingGlyphSink>)

Installs the sink for grapheme clusters that exhaust font fallback during Self::layout_line. The core text system installs its reporter when it is created. Platforms that do not detect missing glyphs keep the default no-op.

fn glyph_dilation_for_color(&self, _color: Hsla) -> u8