pcbjam/docs
Repository files (latest commit first)
Filename Latest commit message Latest commit date
Viktor Vaczi db9d6ee04b feat(wasm): occ-split — lazy occ_service worker; kicad_editor drops OCC (−31%)
Move OpenCASCADE out of the merged editor image into occ_service: a separate
emscripten module (-sASYNCIFY=0, MODULARIZE, in-container -Oz finalize, 2N+8
pre-warmed pthread pool) booted lazily in a dedicated Web Worker on the first
STEP export or STEP/IGES model parse. kicad_editor.wasm ~190 MB -> 130 MB;
sessions that never touch OCC never fetch its 57 MB. STEP export works in the
browser for the first time: the unchanged desktop dialog runs EXPORTER_STEP,
whose wasm shadow suspends into globalThis.occService and the export bytes go
straight to a browser download (never entering the editor heap). STEP/IGES 3D
models parse in the worker via the oce shadow (S3D WriteCache/ReadCache wire).

- wasm/occ-service/: service CMake target (hooked from the kicad fork's
  top-level CMakeLists, wasm/editor pattern), embind entry
  (occExport/occLoadModel), wxConfig pre-js.
- wasm/stubs/{exporter_step,oce_plugin}_stub.cpp: EM_ASYNC_JS worker bridges
  (callee-shadowing; no caller #ifdefs).
- web/standalone: provider installed whenever the kicad_editor bundle boots
  (cross-face safe); ONE shared worker-boot source occ-worker.js (vite ?raw;
  the e2e stub reads the same file) — blob worker with locateFile absolutized
  against the glue URL; export download-name guard.
- deps: OCC builds with RapidJSON so its glTF/GLB writer exists — pinned to
  the vcpkg master snapshot 2025-02-26 (24b5e7a8b27f), the same code official
  KiCad consumes via vcpkg.json's opencascade[rapidjson]; rapidjson's latest
  tag (v1.1.0, 2016) is ill-formed under modern clang.
- tests: occ-export dialog e2e (lazy-fetch boundary + STEP download bytes),
  occ-probe incl. a 9-format matrix (step/stpz/brep/xao/ply/stl/glb/u3d/pdf),
  3d-viewer-models hard-asserts the worker parse; occ provider stub installed
  ambiently by the kicad fixtures.

Validated against desktop kicad-cli 10.0.4: geometric exact equality (bbox
delta 0 um, volume delta 0.0000%) for STEP/GLB/STL/BREP/STPZ across three
boards and option sweeps — with desktop OCC 7.9 vs wasm OCC 7.8; PLY/XAO/PDF
structurally equal; U3D same-size (quantizer float LSBs differ). Full kicad
e2e green on Firefox and Chromium; standalone verified end to end (lazy fetch
only on the Export click; export.step 60,628 B ISO-10303-21; loadModel 700 KB
STEP -> 569 KB scenegraph cache).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-03 12:39:58 +02:00
..
debugging docs: ✏️ cleanup and organize docs 2026-06-05 12:16:13 +02:00
features feat(wasm): occ-split — lazy occ_service worker; kicad_editor drops OCC (−31%) 2026-07-03 12:39:58 +02:00
research docs: ✏️ cleanup and organize docs 2026-06-05 12:16:13 +02:00
build.md refactor: collapse dual-mode plumbing — the DOM port is the only WASM build 2026-06-12 20:19:48 +02:00
ci-build-slowness-findings.md docs: CI build perf findings + parked wasm-exceptions experiment 2026-06-11 07:50:57 +02:00
README.md docs: ✏️ cleanup and organize docs 2026-06-05 12:16:13 +02:00
wasm-exceptions-experiment.md feat(wasm-eh): migrate the WASM build to native wasm exceptions (+ 3D viewer default-on) 2026-06-30 09:40:26 +02:00

Documentation Map

A central index of the documentation in this repo. The goal of the project is to build KiCad with WASM and run it in a browser.

Note: per-area README.md files stay next to the code they describe (they're linked below). Cross-cutting guides live under docs/. Per-feature design notes live under features/.

Start here

  • Project README — overview, prerequisites, quick start, project structure
  • CLAUDE.md — project/agent context and contribution conventions

Build

  • docs/build.md — Docker-based KiCad WASM build system (two-phase build, outputs, memory)
  • docker/README.md — Docker build environment, branch-specific containers, troubleshooting
  • wasm/README.md — WASM compatibility layer (overrides/shims without patching KiCad)

Debugging & Asyncify

Architecture

  • wasm/README.md — WASM compatibility layer structure
  • web/README.md — web app (create/open KiCad projects), tech stack, URL routing, WASM artifact serving

Testing

Feature design docs

Per-feature design notes and porting records live under features/:

Archived / historical

features/archive/ holds docs whose work is done or superseded (each carries a status banner):

  • webgl — WebGL-GAL strategy/plan (since implemented in kicad/common/gal/webgl/)
  • ipc-api — IPC-API guard cleanup TODO (revert not yet actioned)