Struct CoverageTile 

pub struct CoverageTile {
    pub width: u32,
    pub height: u32,
    pub data: Arc<Vec<u8>>,
}

An 8-bit coverage tile: width * height alpha samples, row-major.

The coverage is Arc-shared so a cached tile can be emitted as a RenderBitmap (or composited) without copying the buffer.

Fields

width: u32

Tile width in pixels.

height: u32

Tile height in pixels.

data: Arc<Vec<u8>>

width * height coverage bytes (0 = empty, 255 = fully covered).

Implementations

impl CoverageTile

pub fn rasterize(path: &Path) -> Option<(Self, i32, i32)>

Rasterize a screen-space path to a coverage tile.

Returns the tile plus the integer (x, y) at which it must be composited. The path’s sub-pixel position is baked into the coverage, so compositing at the returned integer offset reproduces the anti-aliasing of a direct fill at the original position. Returns None for an empty or unrasterizable path.

Trait Implementations

impl Clone for CoverageTile

fn clone(&self) -> CoverageTile

Returns a duplicate of the value.

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

Performs copy-assignment from source.