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NoopTextSystem

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>

Get all available font names.

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

Get the font ID for a font descriptor.

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

Get metrics for a font.

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

Get typographic bounds for a glyph.

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

Get the advance width for a glyph.

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

Get the glyph ID for a character.

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

Get raster bounds for a glyph.

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

Rasterize a glyph.

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

Layout a line of text with the given font runs.

fn recommended_rendering_mode( &self, _font_id: FontId, _font_size: Pixels, ) -> TextRenderingMode

Returns the recommended text rendering mode for the given font and size.

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

Prewarm any system font caches needed to shape text.

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

Returns the dilation level to use for a glyph painted in the given color.

Auto Trait Implementations§

impl Freeze for NoopTextSystem

impl RefUnwindSafe for NoopTextSystem

impl Send for NoopTextSystem

impl Sync for NoopTextSystem

impl Unpin for NoopTextSystem

impl UnsafeUnpin for NoopTextSystem

impl UnwindSafe for NoopTextSystem

Blanket Implementations§

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