[Webkit-unassigned] [Bug 39187] New: Smudge when scrolling slightly rotated text

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=39187

           Summary: Smudge when scrolling slightly rotated text
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
               URL: http://www.panic.com/blog/2010/05/vegan-co-op-luncheon
                    /
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jamesr at chromium.org


The page http://www.panic.com/blog/2010/05/vegan-co-op-luncheon/ has a randomly selected small rotation applied to a blog entry.  When scrolling this on OS 10.5, there are very visible graphical smudges left behind.  Forcing a full repaint (by resizing the window, for example) cleans up the smudges.  I'll attach a screenshot.

I don't see any issue on Safari 4.0.5 on Windows 7, but it looks like on that platform there's no attempt made to anti-alias the text.  I haven't checked if this happens on 10.6.

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