[Webkit-unassigned] [Bug 90354] New: Position replaced elements on pixel bounds

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=90354

           Summary: Position replaced elements on pixel bounds
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: eae at chromium.org
                CC: eric at webkit.org, abarth at webkit.org


To avoid sizing and repaint issues we should layout replaced elements on pixel bounds. We already ensure that replaced elements are sized in full pixels and that they are painted on pixel bounds. By also ensuring that they are placed on pixel bounds we avoid pixel having the size be expanded by pixel snapping and repainting/invalidation rect issues when scrolling.

Downstream chromium bug: http://code.google.com/p/chromium/issues/detail?id=133792

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