A dashed stroke of a path with more than 1,024 path elements was outlined
whole in every frame after an edit. It is now outlined in and around the
view like a solid stroke. dash_kept runs the pattern along every segment
and keeps only the dashes and dots on the segments near the view, so they
sit where dashing the whole path puts them and the pixels are the same.
A pattern too fine to draw is still drawn solid, and that solid stroke is
cropped too.
At 1600 x 1200 the frame after one anchor moves takes 14 ms instead of
102 ms on a filled closed path of 50,000 anchors with 6 pt dashes and
4 pt gaps. anchor_bench now includes that document.
The renderer outlined the whole stroke of an edited path on every frame,
so dragging one anchor of a path with many anchors re-outlined every
segment. A stroke line of more than 1,024 elements without dashes or a
width profile is now outlined only for the segments within the stroke's
reach of the view, inflated by the view's own size on each side. The
cached outline keeps that region, and a frame outside it outlines the
stroke again. Closed subpaths that a wide stroke crosses over stay whole,
and a cut closed subpath is walked from a removed segment so no cut lands
where it starts and ends. The pixels are the same.
At 1600 x 1200, the frame after one anchor moves takes 28 to 30 ms
instead of 103 ms on an open path of 200,000 anchors, and 10 ms instead
of 30 ms on a closed path of 50,000 anchors (the new anchor_bench
example: cargo run --release -p vectorcraft-engine --example anchor_bench).
Writer::fresh_id probed prefix-1, prefix-2, ... from 1 on every call,
formatting and hashing each candidate, so writing N gradients, clip
paths or masks cost O(N^2). Ids are never released, so every number
below the last one handed out for a prefix is taken: remember where
the search for each prefix stopped and resume there. The ids written
are the same as before.
examples/still-life.vectorcraft (12k gradients, 6.3 MB SVG) exported
in about 8.6 s (median); it now takes about 0.15 s. Output is byte-identical
for every document in examples/.
Add crates/engine/examples/export_bench.rs to time document.export
on the example documents, and a test pinning the generated id
sequence when object names already take some of the numbers.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
dotCooCoo