[Webkit-unassigned] [Bug 22891] New: Scrolling in Windows Cairo Broken if no background color set.

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Dec 16 15:25:19 PST 2008


           Summary: Scrolling in Windows Cairo Broken if no background color
           Product: WebKit
           Version: 523.x (Safari 3)
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bfulgham at gmail.com

Attempting to view the http://planet.webkit.org page with the WinLauncher
executable on the Cairo-backend exhibits a scrolling bug (see attached image
"bad_scroll_planet_webkit.jp").  As you scroll further down the page, the "bad"
region at the top of the screen grows, until some inflection point at which the
cycle seems to start over.

I managed to reduce the problem down to the point where the scroll works as
expected if the page has a background color set.  Consider Bad.html (and
corresponding "bad_scroll_reduced.jpg") where the scroll misbehaves, and the
Good.html (and corresponding "good_scroll_reduced.jpg"), where things work

bfulgham at bfulgham ~
$ diff Bad.html Good.html
< <body>
> <body bgcolor="#FFFFFF">

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