[Webkit-unassigned] [Bug 50547] New: Custom scrollbars do not support transparency

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=50547

           Summary: Custom scrollbars do not support transparency
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: adman.com at gmail.com


Created an attachment (id=75645)
 --> (https://bugs.webkit.org/attachment.cgi?id=75645&action=review)
Example

When specifying a custom scrollbar and setting the background to transparent, graphical glitches occur as the page is not rendered behind the scrollbar and hence is either black or whatever was there in the last graphical update.

Could transparent mean either: 
1) match the background color of the root (html) element
or 
2) (preferred) have an option to overlay the scrollbars onto the content (e.g. the width of the page is not reduced by the scrollbar, and therefore transparent will result in the page showing through)

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