canvas.drawElementImage is an unlaunched Dev/Canary-only Blink feature
(~151+). The CLI's pinned CHROME_VERSION fallback was still 131.0.6778.85 —
a puppeteer 24→25.2.1 bump that pinned it to Chrome Dev 151.0.7912.0 was
written on 2026-06-29 but never merged (orphaned local commit, no PR). Any
render on that pin, or on the shared puppeteer-cache binary, or on system
Chrome (Stable, no drawElementImage at all) got a canvas.getContext("2d")
missing the method and crashed mid-capture with "ctx.drawElementImage is
not a function" instead of falling back (HF#2060).
Three changes:
- Bump puppeteer/puppeteer-core to ^25.2.1 across every package that
depends on it, and CHROME_VERSION to 152.0.7928.2 (today's Dev channel;
confirmed via direct probe to implement drawElementImage, unlike 131).
- `ensureBrowser({ preferManagedChrome: true })`, always used by `render`:
resolve straight to our pinned/cached build, skipping both the shared
puppeteer-cache preference and system Chrome. Rendering shouldn't depend
on whatever arbitrary Chrome a machine happens to have — that's exactly
how this regressed (any Mac with Chrome.app installed bypassed the CLI's
pin entirely).
- A runtime capability probe in the engine, right before any other
drawElement work: if `drawElementImage` isn't a function on the injected
canvas, route to the existing screenshot-fallback gate instead of
crashing. This is the real backstop — it protects every resolution path
(env override, stale cache entry, a future Chrome regression), not just
the ones `preferManagedChrome` reaches.
Verified end-to-end: rendering against chrome-headless-shell 131 (confirmed
to lack drawElementImage) now falls back cleanly and produces a valid MP4
instead of crashing; rendering against a capable build still engages
drawElement normally. 922 engine tests + 1373 CLI tests pass.
Fixes#2060.
* feat(engine): drawElementImage capture service
* feat(engine): 3D projection + compositor-effect risk gate
* fix(engine): gate filter drop-shadow wherever blur gates (review)
detectCssEffectRisk documented drop-shadow as a ~29dB damage case but only
detected blur( in its three scan paths — a drop-shadow comp stayed on the
fast path despite the gate's own correctness contract. Detect drop-shadow(
in computed styles, stylesheet rules, and GSAP tween vars, pinned by a
focused test that runs the real page-side closure against a DOM shim
(computed / stylesheet / tween coverage + blur regression + effect-free
null).
Addresses miguel-heygen's blocker on #1918.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* feat(engine): frame-capture core — fast-capture routing, worker-encode, dedup extension
# Conflicts:
# packages/engine/src/services/screenshotService.ts
* fix(engine): document HF_FORCE_DRAWELEMENT as diagnostic-only; make armStaticDedup idempotent (review)
Addresses miguel-heygen's blockers on #1919:
- HF_FORCE_DRAWELEMENT promoted from a stale "SCRATCH/Uncommitted" comment to
a documented diagnostic flag: it exists for upstream-Chromium repro work
(gate-vs-API isolation, crbug 521861819 149-vs-151) and R&D on gated effect
classes; renders under it may be damaged BY DESIGN since it bypasses gates
whose thresholds encode measured damage. Never production; the safety-net
blank guard also stands down under it so diagnostic frames arrive unmodified.
- armStaticDedup is now idempotent: the drawElement init path arms dedup
before canvas injection, then initializeSession called it again — the
second run overwrote the armed state with skipReason="capture_mode"
(captureMode is "drawelement" by then), producing contradictory telemetry
(armed frames + a skip reason), and re-ran the verification seeks on the
fallback path. It now no-ops once staticFrames or a skip decision exists.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* feat(producer): fast-capture render stages + remote bg-image localizer
* feat(lint,player): fast-capture lint rule + player media sync
---------
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Miguel Ángel