Struct AtlasData 

#[non_exhaustive]
pub struct AtlasData {
    pub geometry: AtlasGeometry,
    pub coverage: Vec<u8>,
}

The CPU-side coverage buffer for a whole atlas, grid-packed per AtlasGeometry.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

geometry: AtlasGeometry

The glyph packing.

coverage: Vec<u8>

Row-major coverage bytes, length tex_w * tex_h * layers. Texel (x, y) of layer l is at ((l * tex_h + y) * tex_w + x). Row 0 is the glyph’s top row, so a shader that flips y when projecting to clip space samples a glyph’s top at uv.y == 0.

Implementations

impl AtlasData

pub fn build(fonts: &FontChain<'static>, cell_size: (u32, u32)) -> Self

Builds a fully-populated, grid-packed atlas for every glyph of every font in fonts, one slot per glyph, so a static bitmap font needs no runtime rasterization.

The fonts are laid out back to back in chain order, so a font’s slots start at the sum of the glyph counts before it, which is the same base GlyphAtlas::resolve adds to a resolved glyph’s own index. Every font in the chain is assumed to share cell_size; a backend’s builder checks that via FontChain::glyph_size before getting here.

Trait Implementations

impl Clone for AtlasData

fn clone(&self) -> AtlasData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AtlasData

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

Formats the value using the given formatter.