[Webkit-unassigned] [Bug 199826] New: [GTK] No web view updates after swapping web process if AC mode is forced

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=199826

            Bug ID: 199826
           Summary: [GTK] No web view updates after swapping web process
                    if AC mode is forced
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Keywords: Gtk
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cgarcia at igalia.com
                CC: bugs-noreply at webkitgtk.org

This can be easily reproduced with MiniBrowser.

1- Start MB with WEBKIT_FORCE_COMPOSITING_MODE=1
2- Wait until webkitgtk.org loads
3- Load google.com (or any other page that make a cross site navigation)

This is because when AC mode is forced the provisional page creates a drawing area that is always in AC mode. When swapping processes, the current drawing area is destroyed (which exists AC mode) and the provisional one is set. From that point the web process is in AC mode but the UI process isn't. We need to update the compositing mode when swapping processes.

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