[Webkit-unassigned] [Bug 149060] New: [ThreadedCompositor] Scrolling artifacts on accelerated subframes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=149060

            Bug ID: 149060
           Summary: [ThreadedCompositor] Scrolling artifacts on
                    accelerated subframes
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: emanuele.aina at collabora.com
                CC: yoon at igalia.com

Created attachment 261000
  --> https://bugs.webkit.org/attachment.cgi?id=261000&action=review
Accelerated subframe testcase

When scrolling an accelerated subframe (eg. an <iframe> containing a transformed element, see the attached scroll.html file) the main frame is scrolled temporarily producing ugly glitches.

This seems to due to excessive scroll notifications where the lower layers notify the upper layers again.

I guess an automated testcase would be appropriate, but I don't know where to start, any suggestion would be appropriate.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.webkit.org/pipermail/webkit-unassigned/attachments/20150911/bd11ee17/attachment.html>