Bug 229433 - WebGL's video tests now require HTMLVideoElement.play's Promise to be reliable
Summary: WebGL's video tests now require HTMLVideoElement.play's Promise to be reliable
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: WebGL (show other bugs)
Version: WebKit Local Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on: 200344
Blocks:
  Show dependency tree / graph
 
Reported: 2021-08-23 19:00 PDT by Kenneth Russell
Modified: 2021-08-24 10:27 PDT (History)
5 users (show)

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Description Kenneth Russell 2021-08-23 19:00:54 PDT 
As of https://github.com/KhronosGroup/WebGL/pull/3319 , Khronos' WebGL conformance tests covering video-to-texture uploads require that the Promise returned from HTMLVideoElement.play be reliable. Once it's been awaited, the next texImage2D from that video element must produce a non-empty frame.

Bug 200344 covers existing issues in the promise resolution; once that's fixed, more refinement may be needed to make the revised tests pass.

For the record, Chromium implements requestVideoFrameCallback and that's why (we expect) these updated tests to pass there. Chromium doesn't yet make this guarantee about awaiting HTMLVideoElement.play's Promise - filing a bug about that now.
Comment 1 Kenneth Russell 2021-08-23 19:02:34 PDT 
Filed against Chromium as:

When HTMLVideoElement.play Promise resolves, texImage2D from video should return non-empty frame
https://bugs.chromium.org/p/chromium/issues/detail?id=1242760
Comment 2 Radar WebKit Bug Importer 2021-08-24 10:27:50 PDT 
<rdar://problem/82298333>