On Sep 5, 2017, at 4:08 AM, Charlie Fenton <charl...@ssl.berkeley.edu> wrote: > The BOINC default screen saver and project screen savers do not work under > any of the beta versions of Mac OS 10.13 High Sierra. I have filed a bug > report with Apple. The bug is still open, so I hope that Apple will resolve > the problem before public release of OS 10.13.
Apple has made the Golden Master (public release) candidate available to developers, and they have not fixed this problem. No project graphics applications will work as screensavers on OS 10.13 High Sierra (though they can still be used from the BOINC Manager via the Show Graphics button.) According to Apple's web site, OS 10.13 will be released to the general public on September 25. The current method BOINC uses to display project screensavers (as well as the "default" screensaver) is to launch the graphics app from the real (Apple) screensaver, but setting the window's z-level higher than that of the Apple screensaver window. As of OS 10.13, applications can no longer make their windows appear over the screensaver window. The only clue regarding the reason for this change was the response another developer with a similar problem received from Apple: > Setting the window level to 2002 is no longer sufficient to pretend to be a > screen saver. There is now a proper view hierarchy that includes ScreenSaver, > LoginWindow, Notifications, and probably others. > > Thank you for your feedback. Engineering has determined that this issue > behaves as intended. I am fairly sure I have found a solution, but it will require all projects to rebuild their graphics applications with a new BOINC library, as well as my releasing a new version of the BOINC installer with modified screensaver code. But I still have a lot of work to do to finish the changes and test them before making them available to projects, which then need to update their graphics applications. My workaround / solution is to use inter-process communication to allow BOINC's Apple-based screensaver code to share the graphics generated by the project graphics applications and display it in the real screensaver's window. Apple does provide a mechanism called IOSurfaceBuffer for sharing OpenGL generated graphics using IPC. I plan to modify our existing code to use this method only on OS 10.13 and beyond, but continue doing things the way we always have on older versions of OSX. But this undertaking is far from trivial, and time is short. Cheers, --Charlie _______________________________________________ boinc_dev mailing list boinc_dev@ssl.berkeley.edu https://lists.ssl.berkeley.edu/mailman/listinfo/boinc_dev To unsubscribe, visit the above URL and (near bottom of page) enter your email address.
