Bug 70086

Summary:

When incremental loading is suppressed for composited content, black flashes can occur before the first paint

Product:

WebKit

Reporter:

Andy Estes <aestes>

Component:

Layout and Rendering

Assignee:

Andy Estes <aestes>

Status:

RESOLVED INVALID

Severity:

Normal

CC:

darin, sam, simon.fraser

Priority:

Keywords:

InRadar

Version:

528+ (Nightly build)

Hardware:

Unspecified

OS:

Unspecified

Bug Depends on:

72106, 73641

Bug Blocks:

Attachments:

Description	Flags
Patch	simon.fraser: review-

Description Andy Estes 2011-10-13 20:36:52 PDT

When incremental loading is suppressed for composited content, black flashes can occur before the first paint

Comment 1 Andy Estes 2011-10-13 20:37:42 PDT

<rdar://problem/10242404>

Comment 2 Andy Estes 2011-10-14 14:41:53 PDT

Created attachment 111081 [details]
Patch

Comment 3 Simon Fraser (smfr) 2011-10-14 14:52:15 PDT

Comment on attachment 111081 [details]
Patch

Andy and I are still discussing this.

Comment 4 Andy Estes 2011-11-11 02:12:07 PST

After talking to Simon I agree the better approach here is to freeze the layer tree during loading, similar to what we do in WebKit2 to prevent flashes when navigating away from a composited page. I'm going to do this in three steps:

- Consolidate the two Mac code paths that install run loop observers for layer tree syncing into a single class that has the ability to install and uninstall the observer.
- Add the layer tree freezing logic for Mac WebKit1 and WebKit2 using this new class.
- Add a separate implementation for Apple's Windows port, which uses a different mechanism for layer tree syncing.

Comment 5 Sam Weinig 2012-02-10 15:57:58 PST

Andy fixed this another way.