[Wayland-bugs] [Bug 83984] New: Add software GL-renderer support to the headless backend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83984

          Priority: medium
            Bug ID: 83984
          Assignee: wayland-bugs at lists.freedesktop.org
            Blocks: 83980
           Summary: Add software GL-renderer support to the headless
                    backend
          Severity: enhancement
    Classification: Unclassified
                OS: All
          Reporter: ppaalanen at gmail.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: weston
           Product: Wayland

Similar to bug #83983, but hook up the GL-renderer, and select it with
renderer=software-gl.

If possible from within the headless backend, force Mesa to run llvmpipe. It's
probably not possible, so some additions to the test scripts are needed. Mesa's
EGL null platform might be useful for this. Actual rendering could be done to
an FBO if needed.

If EGL null platform init fails, the implementation is not Mesa, or whatever
that implies the resident GL stack is not capable of running this test, the
test needs to be skipped, not failed.

Add a test, that excercises the GL-renderer; just start Weston on headless with
GL, map a window, wait for a frame callback, and exit.

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