[Webkit-unassigned] [Bug 167492] New: [GTK] Stop forcing accelerated compositing by default

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=167492

            Bug ID: 167492
           Summary: [GTK] Stop forcing accelerated compositing by default
    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

We are now ready to bring back the on demand accelerated compositing mode with the threaded compositor. Unfortunately, having AC always enabled brought  a lot of issues for many people. Not only it requires a lot more memory but also caused rendering issues (or even nothing rendered at all) with some graphics drivers. People started to use WEBKIT_DISABLE_COMPOSITING_MODE as a workaround, but that was not expected to be used by users. So, entering/leaving AC when required by web contents is not actually the solution but a huge improvement for many people. If we are eventually ready to force AC mode again, we'll change this again. Note that we still have WEBKIT_DISABLE_COMPOSITING_MODE, but now also WEBKIT_FORCE_COMPOSITING_MODE for testing and debugging.

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