primus - 0~20150328-18 main

Primus is a shared library that provides OpenGL and GLX APIs and implements
low-overhead local-only client-side OpenGL offloading via GLX forking,
similar to VirtualGL. It intercepts GLX calls and redirects GL rendering
to a secondary X display, presumably driven by a faster GPU. On swapping
buffers, rendered contents are read back using a PBO and copied onto
the drawable it was supposed to be rendered on in the first place.
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Primus is currently intended to be used alongside Bumblebee and provides a
drop-in replacement for optirun (i.e. "primusrun").