[Webkit-unassigned] [Bug 167544] New: [GTK] Do not release OpenGL resource immediately when leaving accelerated compositing mode

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=167544

            Bug ID: 167544
           Summary: [GTK] Do not release OpenGL resource immediately when
                    leaving accelerated compositing mode
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Keywords: Gtk
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cgarcia at igalia.com
                CC: bugs-noreply at webkitgtk.org

Sometimes the conditions to be in AC mode or not change quickly, and then we leave AC mode just enter it again after a very short period of time. In those cases we are dropping all the GL resources and the compositor thread, and creating it again. We could keep the layer tree host alive for a while when exiting AC mode, and reuse it if we enter AC mode before the previous one has been discarded. While the previous layer tree host is alive we still need to keep it up to date, for example if the web view is resized or contents size change, and synchronize with the threaded compositor when it becomes the layer tree host again.

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