[Webkit-unassigned] [Bug 218186] CanvasCaptureMediaStreamTrack enables WebGL drawing buffer preserving and changes clear semantics
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Sat Mar 6 04:43:59 PST 2021
https://bugs.webkit.org/show_bug.cgi?id=218186
--- Comment #3 from Kimmo Kinnunen <kkinnunen at apple.com> ---
So the purpose of the feature is to take the webgl canvas contents and send it through webrtc, if I understand correctly.
What the implementation does is:
1) Turn on WebGL "preserve drawing buffer" flag of the webgl context.
2) Takes a snapshot of the webgl canvas contents at random point in time after each modification when the execution drops to main loop
3) send that picture over webrtc
Steps 1 and 2 are not good.
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