1653737 - Add vsync output time to VsyncEvent

Status: RESOLVED FIXED

(Core :: Graphics, task)

Description

[Markus Stange [:mstange]]

See bug 1653355. In this bug I want to land the patches that add the infrastructure but don't change the behavior for video.

Comment 1

[Markus Stange [:mstange]]

Attachment: Bug 1653737 - Add output time to VsyncEvent. r=nical

This timestamp is provided by the system on macOS, and estimated as "the next
vsync" on all other platforms.

On macOS, the output time increments in very consistent amounts. The timestamp
is independent of when exactly the vsync callback ends up running, so it is less
vulnerable to unfortunate thread scheduling.
This makes it a more reliable source for picking video frames, for example.

Comment 2

[Markus Stange [:mstange]]

Attachment: Bug 1653737 - Expose vsync output time from CompositorVsyncScheduler. r=nical

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/d917b77f7fa4
Add output time to VsyncEvent. r=nical
https://hg.mozilla.org/integration/autoland/rev/18368027eeec
Expose vsync output time from CompositorVsyncScheduler. r=nical

Comment 4

[Cristina Coroiu [:ccoroiu]]

https://hg.mozilla.org/mozilla-central/rev/d917b77f7fa4
https://hg.mozilla.org/mozilla-central/rev/18368027eeec