4 Commits

Include renames

Author	SHA1	Message	Date
Chris Tsang	6671d7d45e	Fix spline ballooning on sparse slices (visioncortex 0.9.1) ... A splice slice with very uneven point spacing — a few-pixel jog followed by a long straight leg, which the walker produces around thin strands — was fitted by a single cubic that interpolated every sample exactly while swinging up to ~30 px sideways between them (the fit error was only measured at the samples). On the Cityscape sample at -p 8 -g 28 the maroon strand's wall bulged across its 2 px gap; a long-standing defect present in pre-1.0 vtracer as well. The fix lives in visioncortex 0.9.1 (densify slices with witness points, keep the full multi-cubic chain): the mosaic's shared-boundary spline fitter switches to the new fit_points_with_beziers so open segments get the same treatment as stacked mode. Verified against the exact pixel-mode rasterization — the fitted wall now matches it at every probed row — with identical path counts and only +3 cubics across the whole Cityscape output. All three workspaces (core, py, nodejs) carry a [patch.crates-io] entry pointing at the local visioncortex until 0.9.1 is published. Regression coverage for spline handle anchoring; re-bless goldens tests/spline_fit.rs traces the real reproduction (the Cityscape sample at color precision 8 / gradient step 28, whose maroon region contains a 1 px by 330 px strand) through both compositors and asserts the property the sparse-slice bug violated: every cubic's control points stay within its shape's on-curve bounding box plus a 15 px allowance. The ballooning fit put a handle 25 px outside the whole shape, so the margin is decisive in both directions. The sample photo is decoded via a test-only image dev-dependency. The synthetic goldens are re-blessed: the fitting fix shifts fixture coordinates slightly (witness points refine fits even on clean shapes); the old files still passed the render-diff, so the visual change is sub-tolerance, but goldens should byte-match intentional behavior. Depend on published visioncortex 0.9.1; drop local path patches	2026-07-27 19:56:03 +01:00
Chris Tsang	f6c8a139a4	update screenshot	2026-07-26 00:31:10 +01:00
Chris Tsang	3300f97e37	Add mosaic spline fitter; fix stacked holes & relative writer; add test suite ... Feature — mosaic spline segment fitter (crates/vtracer/src/mosaic/fit.rs): open-path cubic fitting for boundary segments, reusing the now-public visioncortex primitives (PathSimplify::limit_penalties for symmetric, gap-free staircase removal; open-path SubdivideSmooth::{find_corners, subdivide_keep_corners,find_splice_points}; fit_points_with_bezier per splice slice). Matches stacked spline curve quality; endpoints pinned to lattice nodes so shared boundaries stay seam-free. Fix — stacked mode punched holes in cluster masks (to_image_with_hole .. true); stacked must trace solid layers and occlude by paint-order overdraw (false). Holes left the layer below exposed as hairline seams. Fix — the relative SVG writer measured a subpath's opening `m` from the last vertex instead of the subpath start (SVG resets the current point to the start after Z), misplacing holes / extra subpaths at optimize=1/2. Tests — new tests/equivalence.rs: stacked-vs-mosaic interior agreement (all fitters) and a seam guard (a full-coverage image must render fully opaque). svg round-trip test (absolute vs relative encode identical geometry). mosaic spline endpoint-pinning test. Regenerated goldens; added disc_mosaic_spline. resvg added as a dev-dependency (test-only; not compiled for wasm). Drop unused MosaicOptions placeholder The strict/seam-stroke mitigations aren't needed — the mosaic geometry is already gapless and seam-free. Remove the no-op MosaicOptions struct and thread it out of Compositing::Mosaic and compose_mosaic.	2026-07-24 11:13:02 +01:00
Chris Tsang	e46c971845	Rewrite into a vectorization framework (pillars 1–4) ... Replace the 0.6.x single-pipeline crate with a stage-based framework, per docs/design/. Implements Motivation pillars 1–4 (frontend, curve fitting, color fitting, optimizer); mosaic (5) and bindings are deferred. Workspace: - crates/vtracer — the framework library (wasm-safe, no I/O) - crates/vtracer-cli — thin CLI wrapper (clap 4 + image I/O) - cmdapp/ and webapp/ excluded from the workspace (git-preserved) Stages behind object-safe traits, composed by a Pipeline driver: - Frontend: ColorClusterFrontend (+ transparency keying), BinaryFrontend - CurveFitter: Pixel / Polygon / Spline (region tracing via visioncortex) - ColorFitter: Identity, FixedPalette (OKLab-nearest), AutoQuantize (area-weighted median cut), MergeAdjacent - OptimizerPass: QuantizePass, SimplifyPass - SvgWriter: relative/absolute shortest encoding, H/V/S shorthands, compact number formatting, <g fill> grouping visioncortex is a path dependency on the local 0.9.0 checkout. Verified: 14 unit/integration tests pass; framework builds for wasm32-unknown-unknown; CLI output renders faithfully via rsvg.	2026-07-23 22:27:24 +01:00