[Webkit-unassigned] [Bug 41036] New: REGRESSION (r61341): Image interpolation quality changes during scrolling and when activating / deactivating application

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=41036

           Summary: REGRESSION (r61341): Image interpolation quality
                    changes during scrolling and when activating /
                    deactivating application
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
               URL: http://epguides.com/AshestoAshes/
        OS/Version: Mac OS X 10.6
            Status: NEW
          Keywords: Regression
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mrowe at apple.com
                CC: levin at chromium.org, senorblanco at chromium.org


Scrolling down the page on <http://epguides.com/AshestoAshes/> and then back to the top results in the image briefly being painted with a lower quality interpolation before snapping in to the higher quality interpolation.  My understanding was that we were only dropping to lower quality interpolation when the image was changing size.  That is not happening on this page.

Steps to reproduce:
1. Load <http://epguides.com/AshestoAshes/>.
2. Scroll to the bottom of the page, then back to the top.  Watch the photo at the top closely while doing so.

Alternate steps to reproduce:
1. Load <http://epguides.com/AshestoAshes/>.
2. Cmd-Tab to a different application, then Cmd-Tab back to Safari.  Watch the photo at the top closely while doing so.


I bisected and determined this to be caused by <http://trac.webkit.org/changeset/61341>, the fix for bug 38233.

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