Canvas team OKRs

Q4 2016

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OffscreenCanvas testing and tracking #wp-predictability

Lead: xidachen
Contribute to web platform tests
Owners: junov, xidachen, xlai
Achieve complete test coverage: Each statement in the spec should be covered by tests, with xrefs to the spec. Upstream the tests to web platform tests repo, test other implementations for conformance Main owner/coordinator is xidachen. xlai and junov are contributors.
Add telemetry performance tests for OffscreenCanvas
Owner: xidachen
Must cover commit() and ImageBitmap flows, cover all permutations of GPU/CPU rendering and compositing, run on GPU bots.
Add usage metrics histograms.
Owner: xidachen
Must track: * OffscreenCanvas feature usage * mode of operation (commit vs transferToImageBitmap) * commit() code path * CPU run time for each commit() code path (on the thread where commit is called) * commit() latency (time elapsed from commit() call to UI compositor update)
Have the fastest implementation
Owners: junov, xidachen, xlai
Write animometer-style benchmarks for OffscreenCanvas (commit and imageBitmap flows, 2D and WebGL). Compare to other implementations. Stay on top Main owner/coordinator: xidachen. junov and xlai to contribute to fixing perf issues.

requestAnimationFrame in Workers #wp-ergonomics

Product excellence #wp-health

Lead: xidachen
Weekly product excellence report
Owner: xidachen
Publish weekly report to chrome-canvas mailing list. Bug stats: outstanding bug count (number fixed, number of new bugs), list of high-profile outstanding bugs (crashers, security, regressions, highly starred, p0-p1), high profile bugs resolved since last report. Keep report history in a google doc. Delegate reporting when on leave.
Performance metrics report
Owner: xidachen
Twice in the quarter, present to paint team show salient fluctuations in key performance metrics.
Prevent bug count from creeping up.
Owners: junov, xidachen, xlai, zakerinasab
(104 outstanding bugs as of October 5 2016)
Refactor Canvas and OffscreenCanvas dependencies on cc
Owners: xidachen, xlai

Misc canvas features #wp-ergonomics

OffscreenCanvas feature complete #wp-future

0.80P2commit() flow working for 2D canvas
Owner: xlai
Mid-quarter status: Stalled for about 3 weeks due to dependency on mojo improvements. Still on track for EOQ EOQ status: Mostly implemented except software compositing cases
0.80P2commit() flow working for WebGL
Owner: xidachen
Mid-quarter status: Not started, still possible by EOQ. EOQ status: Mostly implemented except software compositing cases
1.00P3GPU-accelerated 2D canvas in a worker
Owner: junov
Mid-quarter status: WIP CL almost done. On track. EOQ status: done.
0.50P1Finish specification for OffscreenCanvas (rolled over from Q2)
Owner: junov
Mid-quarter status: iterated on proposal some more, still attainable by EOQ, moderate risk of slipping. EOQ: Draft complete, not yet publicly shared.
0.80P3Canvas readback APIs + tainting for 2D
Owner: xlai
getImageData + toBlob + toDataURL working on OffscreenCanvas on main thread + Workers (stretch) Mid-quarter status: WIP, tainting for 2D completed, the rest partially implemented, at risk of slipping into Q4 EOQ status: done, except for toBlob which is not yet implemented

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0.10P3Canvas color space support #wp-future

Mid-quarter: Slow progress so far this Q, work on colorspace implementation is ramping up with zakerinasab@
0.00P2Converge spec proposal
Owner: junov
Close all unresolved issues about the proposal on the W3C WICG forum Mid-quareter status: No progress. Still attainable this Q
0.00P3Write spec (stretch)
Owner: junov
Commit CanvasColorSpace spec against WHATWG HTML spec. Mid-quarter status: No progress, not likely this quarter.
0.30P4Prototype/experimental implementation in Blink
Owner: junov
Mid-qarter status: Partially landed. Experimental API is there, color space plumbing in the compositor is there, not functional due to several missing pieces in skia, blink and compositor.

0.74P1Product Excellence #wp-health

0.80P2Reduce bug count
Owners: junov, xidachen, xlai
Go from 121 to under 100 open bugs (Type = Bug + Bug-Regression + Bug-Security) Mid-quarter status: 106 outstanding bugs. On track! EOQ status: 104 bugs.
P1Resolve all memory leak-like issues related to canvas
Owner: xidachen
Mid-quarter status: Out of our hands: dependency on V8 team GC triggers.
0.80P12 week SLA on fixing crashers and security bugs
Owners: junov, xidachen, xlai
Mid-quarter status: On track. EOQ status: crasher 624718 is lagging behind. Otherwise we did good.
1.00P21 week SLA on triage
Owner: junov
Mid-quarter status: on track EOQ: done.
0.50P3Be the best browser for all canvas-related Animometer benchmark scores
Owner: junov
(Includes work by intern sebastienlc) Mid-quarter status: implemented but not enabled. Not on track because no one is currently owning follow-up on intern's work. Postponing. EOQ status: some heuristic for falling back to SW have been implemented, thus preventing critical performance cliffs. Global approach is not ready to ship.
0.60P2Fix top starred issues
Owners: junov, xidachen
crbug.com/618324 - Experimental `imageSmoothingQuality` property doesn't provide expected quality crbug.com/7508 - We don't anti-alias <canvas> drawImage Mid-quarter status: 7508 is fixed, 618324 has been investigated but will probably not be fixed this quarter. EOQ status: 1/2 bugs fixed + bonus bug 424291

0.70P3Ship ImageBitmap resize
Owner: xidachen
Mid-quarter status: on track EOQ staus: implementation complete, but not shipped
0.90P2Ship ImageSmoothingQuality
Owner: junov
Mid-quarter status: done, but there are outstanding complaint about the quality of the mipmaps used for high quality filtering.