[Webkit-unassigned] [Bug 197768] New: Layer bounds are incorrect for sharing layers that paint with transforms

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=197768

            Bug ID: 197768
           Summary: Layer bounds are incorrect for sharing layers that
                    paint with transforms
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Compositing
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com

Created attachment 369545

  --> https://bugs.webkit.org/attachment.cgi?id=369545&action=review

Testcase

Attached testcase (with layer borders on) show that we make backing that is much too big when the shared layer has a transform.

We need to do the right transform math when computing composited bounds.

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