[Webkit-unassigned] [Bug 147879] New: Backdrop-filter blur rendering issue

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=147879

            Bug ID: 147879
           Summary: Backdrop-filter blur rendering issue
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Macintosh
                OS: Mac OS X 10.10
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: haysmathieu at gmail.com

Created attachment 258714
  --> https://bugs.webkit.org/attachment.cgi?id=258714&action=review
Gif demonstration of the issue

Hi,

Issue:
The Blur generation catches other windows into the blur generation when used in -webkit-backdrop-filter

How to reproduce:
I made a very simple example : http://mathieuhays.github.io/Backdrop-filter/

Open the inspector on a separate window.
Position it above the blurred part.
Toggle the css property -webkit-backdrop-filter off and on again.
Move the inspector out of the way.
You should see that the inspector window has been included in the blur rendering.

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