Bug 257295

Summary: Add API to EventDispatcher to observing displayDidRefresh on a background thread
Product: WebKit Reporter: Matt Woodrow <mattwoodrow>
Component: Layout and RenderingAssignee: Matt Woodrow <mattwoodrow>
Status: NEW ---    
Severity: Normal CC: bfulgham, simon.fraser, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on:    
Bug Blocks: 232918    

Description Matt Woodrow 2023-05-24 17:34:03 PDT 
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.
Comment 1 Radar WebKit Bug Importer 2023-05-24 17:36:55 PDT 
<rdar://problem/109804872>
Comment 2 Matt Woodrow 2023-05-24 17:45:44 PDT 
Pull request: https://github.com/WebKit/WebKit/pull/14318