Module raster 

Path coverage in 16 by 16 tiles: per pixel, the average winding number over its area, mapped by the fill rule.

rasterize accumulates lines only in the columns an edge touches, one tile row at a time. Tiles no edge reaches take the winding of their run and become Full or Empty. The prefix sums add the same non-zero terms in the same order as dense::rasterize_dense, so both produce the same bytes. All code is scalar in a fixed order (f64 geometry, f32 accumulation, no FMA), so coverage is identical on every target.

Modules

dense

The reference rasterizer, accumulating every pixel of the clip. super::rasterize must produce the same bytes.

Structs

CoverageCache

An LRU coverage cache with a byte budget.

RasterScratch

Buffers reused from one rasterization to the next.

TileCoverage

A path’s coverage over a rectangle of whole tiles.

Enums

TileState

What one tile of coverage holds.

Constants

TILE

Tile edge, in pixels.

TILE_BYTES

Bytes of one tile’s coverage.

Functions

coverage_key

The key of path’s coverage under rule in clip, hashed from exact bits.

flattened

The flattened lines rasterize accumulates for path, relative to the tile-aligned clip.

rasterize

The coverage of path under rule within clip (device pixels, grown to whole tiles).

tile_aligned

clip grown outward to whole tiles.

winding_at

The winding number of path around point from its flattened lines, for hit tests.