[Webkit-unassigned] [Bug 52335] New: [Chromium] Bleeding/incorrect edge pixels when scaling images on Snow Leopard

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=52335

           Summary: [Chromium] Bleeding/incorrect edge pixels when scaling
                    images on Snow Leopard
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.6
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mihaip at chromium.org
                CC: abarth at webkit.org, thakis at chromium.org,
                    jamesr at chromium.org


Created an attachment (id=78756)
 --> (https://bugs.webkit.org/attachment.cgi?id=78756&action=review)
Screenshot

Load http://trac.webkit.org/export/75656/trunk/LayoutTests/css2.1/t0803-c5502-mrgn-r-00-c-ag.html and inspect with the DigitalColor Meter the pixels to the right of the bottom edge of the first bar. They should be pure white, but instead they appear as FDFBFB. This is in the portion of the test that uses http://trac.webkit.org/export/75656/trunk/LayoutTests/css2.1/support/swatch-white.png, which is a 15x15 pure white image that is being re-scaled to 48x10.

This only appears to happen with Chromium on Snow Leopard, Chromium on Leopard and the mac port on either one don't have this problem. It doesn't happen if the scaled size is 15x10 or 48x15.

Cc-ing Adam since the image decoders (which the Mac port doesn't use) could somehow be implicated.

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