[Bug 280984] bhyve VNC color issue with noVNC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280984

            Bug ID: 280984
           Summary: bhyve VNC color issue with noVNC
           Product: Base System
           Version: 15.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bhyve
          Assignee: virtualization@FreeBSD.org
          Reporter: mp@FreeBSD.org

The colors are incorrect when connecting noVNC client to the bhyve VNC server.
This came up in the bhyve weekly call and here is a Google group link that
describes it further:

https://groups.google.com/g/novnc/c/zzF5Yw4UgqY

The bhyve VNC server only outputs RGB 32-bit values but noVNC is requesting
(and only supports) BGR ordering via the SetPixelFormat message
(https://datatracker.ietf.org/doc/html/rfc6143#section-7.5.1). Thus, the red
and blue colors end up reversed.

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