[Webkit-unassigned] [Bug 50469] New: [chromium] Entire page shifted one pixel when using compositor.

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Dec 3 11:40:31 PST 2010


https://bugs.webkit.org/show_bug.cgi?id=50469

           Summary: [chromium] Entire page shifted one pixel when using
                    compositor.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: enne at google.com
                CC: jamesr at chromium.org, vangelis at chromium.org,
                    nduca at chromium.org


In some cases on Chromium when using the compositor, the root layer appears to be drawn one pixel left and one pixel up from where it should be when using the compositor.

Steps to reproduce:

1) Open http://webkit.org/blog/386/3d-transforms/
2) Right click on the "Poster circle" link and open it in a new tab.  Alternatively, middle click on that link.
3) For comparison, open a new tab and go directly to http://webkit.org/blog-files/3d-transform/poster-circle.html and compare with the result from #2.

I'm wondering if this only happens if the two tabs share the same render process.  If you close the incorrectly displaying tab and then ctrl+shift+T to reopen that closed tab, it will create a new render process and the tab contents will appear correctly.

I'm using Chromium with WebKit r73140 on Linux.  If I turn off the compositor, this doesn't occur.

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