[Webkit-unassigned] [Bug 257295] New: Add API to EventDispatcher to observing displayDidRefresh on a background thread

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed May 24 17:34:03 PDT 2023


https://bugs.webkit.org/show_bug.cgi?id=257295

            Bug ID: 257295
           Summary: Add API to EventDispatcher to observing
                    displayDidRefresh on a background thread
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mattwoodrow at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com
            Blocks: 232918

In order to deliver displayDidRefresh for WorkerThread requestAnimationFrame, we want a version of displayDidRefresh/DisplayRefreshMonitor that allows notifications without blocking on the main thread. We also likely want to match whatever framerate/throttling the underlying WebCore::Page is using, so that we slow down when hidden etc.

DisplayRefreshMonitor is heavily hardcoded towards using the main thread, so I think the easiest thing to do is add an API to EventDispatcher which handles this.


Referenced Bugs:

https://bugs.webkit.org/show_bug.cgi?id=232918
[Bug 232918] requestAnimationFrame callbacks in workers should be driven off display updates
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