Formats / SVG / corpus evidence

SVG geometry under independent pressure¶

Tokimu uses a deliberately selected subset of the W3C SVG 1.1 Second Edition test suite to pressure XML parsing, SVG lowering, provider-neutral vector geometry, tessellation, and diagnostics.

This percentage means that the selection manifest represents 40 unique upstream conformance documents out of the 525-document conformance denominator. It does not mean that Tokimu is 7.62% compliant with SVG 1.1.

Evidence ledger¶

Measure	Current evidence	What it means
Unique upstream documents	40 / 525	The official coverage denominator
Selection manifest entries	62	16 source entries and 46 derived entries
Registered SVG runner cases	50	47 retain upstream provenance; 3 are local diagnostics
Reviewed structural goldens	60 / 60	All producers, not only SVG

Evidence identity

This page is checked against docs/Libraries/w3c-svg-corpus-testing.md. The source record was last updated on 2026-07-28 and is represented here from source revision 7fd812e. If these values drift, website validation fails rather than silently publishing an older claim.

Artifact entry points¶

The public summary remains traceable to the repository evidence that produced it:

These links expose inputs and structural validation machinery. Native-window screenshots remain separately labeled manual evidence and are not substituted for topology, mesh, bounds, or fingerprint artifacts.

What reaches presentation geometry¶

The admitted profile currently exercises:

absolute, relative, repeated, and close path commands;
quadratic and cubic curves, smooth curves, and bounded arc evidence;
lines, polylines, polygons, rectangles, circles, and ellipses;
multiple contours and even-odd or non-zero fill intent;
nested groups and selected presentation inheritance;
transform composition and transform order;
bounded solid and dashed stroke evidence;
parser-neutral XML, vector, mesh, and fingerprint artifacts.

These are WASM semantic and deterministic structural claims. They describe Tokimu-owned observations and geometry artifacts, not browser-native SVG rendering.

Evidence types¶

Structural

Outline, vector, mesh, topology, bounds, and fingerprint artifacts are authoritative for structural claims.

Deterministic CPU

Saved CPU images provide reproducible visual evidence without claiming GPU framebuffer equivalence.

WASM semantic

The website island invokes Tokimu's Rust/WASM importer and presents its provider-neutral observation.

Browser visual

Canvas output helps human inspection, but remains complementary visual evidence rather than semantic truth.

Known exclusions¶

The current profile does not claim:

complete SVG 1.1 or browser conformance;
gradients, masks, filters, animation, DOM, or scripting;
SVG text and font rendering;
general nested, concave, multi-contour, or stroke clip paths;
complete transformed or non-uniform stroke-width conformance;
full W3C reference-image comparison.

Unsupported semantics should stop at an explicit diagnostic boundary. They are not silently delegated to the browser and are not counted as passes.

Reproduce the evidence¶

Verify the pinned fixture set:

pwsh -NoProfile -File .\scripts\verify-w3c-svg-fixtures.ps1

Run structural tests:

cargo test -p presentation-geometry-corpus --lib

Compare all reviewed structural goldens without rewriting them:

cargo run -p presentation-geometry-corpus -- compare-all

The next highest-return pressure is transformed stroke behavior, broader clipping, fill-rule edge cases, viewport sizing, and explicit paint-server boundaries.