[Webkit-unassigned] [Bug 141983] New: Shadow DOM document doesn't always match CSS document (for image generators)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=141983

            Bug ID: 141983
           Summary: Shadow DOM document doesn't always match CSS document
                    (for image generators)
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dino at apple.com

I hit this issue with the media controls on iOS.

They use a -webkit-canvas(name) for the background of an element. Later, when we want to paint into that, the reference to document is pointing to a different place than the context was created, even though the element is in the shadow DOM. I had to use ownerDocument to get it to work.

This is also not always reproducible. It seems that if you try to paint into the context BEFORE you've caused a layout, everything works.


See <rdar://problem/19923536> for more details.

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