The memory work (cache budget, pressure handling, unloadModel) lives in
ViewportCore and so already ran in the wasm, but the page could not see
or use any of it: the web host had no onFrameStats, and there were no
bindings for residency.
- WebViewportHost latches the last FrameStats; ifcv_get_frame_stats_c
hands them to JS as doubles, and viewer.stats() returns {fps,
frameTimeMs, objects, triangles, drawCalls, vram{used, capacity,
budget}, workingSet{chunks, chunksMissing, missingBytes}} — the same
figures BonsaiViewer's status bar shows. Device-wide VRAM is omitted:
there is no query for it on web.
- viewer.unloadModel / loadModel / modelUnloaded / modelVramBytes, keyed
by source id like the other per-model calls.
- The demo page shows a GPU memory line that turns into a "full: N of M
visible chunks not loaded" notice once a shortfall persists for 3 s,
and each model's MB with an Unload/Load button.
- memory.spec.mjs covers stats() and the unload/load round trip.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Restructure the web viewer so the wasm is a reusable module and add a
second example that drives it from ordinary page DOM.
Build:
- Emit IfcViewerWeb.js (a `createIfcViewer` factory, MODULARIZE) + .wasm
instead of a single baked page (dropped --shell-file); copy the static
example pages next to it at build time.
- Unbreak the web build: CameraMath.h / ViewportCore.cpp used
boost::math::constants::pi just for pi, pulling all of boost/math into a
header shared with the Emscripten build (no Boost in its sysroot). Replace
with a constexpr kPiF — identical value, no dependency, desktop unaffected.
JS integration (web/ifcviewer.js):
- A small helper wraps the factory: boots the viewer on a canvas, runs the
RAF loop from onRuntimeInitialized (NOT a post-await .then, which stalls
Dawn-web's device callback and leaves the device half-initialised), and
exposes addFile/addUrl, clearScene, model list/progress, and onSelect(...).
- ViewportCore/main_web emit each pick to JS via Module.__ifcvOnSelect
(object id + IFC GlobalId + model index; empty on deselect); onSelect also
dispatches an 'ifcviewer:select' DOM event.
- Fix input coords for a non-fullscreen canvas: mousemove/mouseup are
window-targeted, so convert their coords to canvas-relative via the canvas
client-rect origin (marquee + box-pick were offset when embedded).
Examples:
- IfcViewerWeb.html: the fullscreen viewer (same DOM/behaviour as before,
now loading the module) — the Playwright smoke suite still targets it.
- embedded.html: a sized viewer with DOM outside it to add models (file or
URL), list loaded models with streaming progress, and show the model +
GlobalId of the clicked object. Starts empty (drops the wasm's embedded
sample, which the fullscreen page/tests still use).
- index.html links both.
Federation note: the web viewer already streams multiple models into one
scene (a byte-source per file/URL); it doesn't need the desktop Federation
document for this. Verified: 11/11 web smoke tests pass; embedded example
loads models, reports the picked model + GUID, and the marquee aligns.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Dion Moult