The renderer keeps the path of a path or compound path of 1,024 anchors
or more by object id, with the bounds of its segments and of its miter
spikes in runs of 128 segments. When anchors move and the subpaths and
anchor counts stay the same, the next frame rewrites only the path
elements of the segments that start or end at a moved anchor, and
measures again only the runs that hold them and the runs of the
segments with length before them. Other edits make the path again as
before. The pixels and the cull bounds are the same.
- StrokeLayer::bounds_on is unchanged. The miter tip of one joint
(miter_tip) and the stroke box with given tips (bounds_with_tips) are
new functions beside it, and Appearance::stroked_bounds_by takes the
box of each shaped stroke, so the cull bounds of a kept path use the
kept tips.
- geom::bez::has_length is the predicate reach.rs used for segments
that draw, made public.
Docs: docs/target-app-parity.md.
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