read_fonts::model::glyph::outline::varc

Trait VarcContext

pub(crate) trait VarcContext {
    // Required methods
    fn coords(&self) -> &[F2Dot14];
    fn draw_glyph(
        &self,
        glyph: GlyphId,
        coords: &[F2Dot14],
        ppem: Option<f32>,
        buf: &mut [u8],
        sink: &mut dyn PathSink,
    ) -> Result<(), Error>;
    fn glyph_buffer_size(&self, glyph: GlyphId) -> usize;
}

Expand description

Provides the data that Outlines::draw needs from outside the table.

This includes the font’s location and the glyphs at the leaves of a composite.

Required Methods§

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fn coords(&self) -> &[F2Dot14]

Returns the normalized variation coordinates of the font’s location.

A component that resets unspecified axes uses these values.

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fn draw_glyph( &self, glyph: GlyphId, coords: &[F2Dot14], ppem: Option<f32>, buf: &mut [u8], sink: &mut dyn PathSink, ) -> Result<(), Error>

Draws glyph into sink at the normalized coordinates coords.

The coords may differ from Self::coords. ppem is the size of the composite, or None for font units. buf is working memory of at least Self::glyph_buffer_size bytes for the glyph.

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