[Webkit-unassigned] [Bug 93542] New: Computing repaint rects inside of style recalc is bad

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=93542

           Summary: Computing repaint rects inside of style recalc is bad
           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: simon.fraser at apple.com
                CC: bdakin at apple.com, dino at apple.com


RenderLayerCompositor::updateBacking() can be called at styleRecalc time, but it does a computeRepaintRectsIncludingDescendants(). Computing repaint rects before we've done layout is invalid, so we need to do this later (probably using a dirty flag).

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