The X.Org Server's GLX Is Being Rewritten
Written by Michael Larabel in X.Org on 26 September 2013 at 12:09 PM EDT. 12 Comments
While most developers are focused around new innovations for Wayland (or Mir), there's still life ahead for the X.Org Server in maintaining legacy support and other cases where the xorg-server will not die for years to come. In improving the X.Org Server, Adam Jackson at Red Hat has been working on rewriting the GLX portion of the X.Org Server.

Adam Jackson's GLX-Rewrite is about simplifying and reducing the number of GLX implementations currently present in the X.Org Server. This GLX-Rewrite already has dramatically reduced the number of lines of code by tens of thousands of lines.

There's many GLX implementations right now within the X.Org Server that are redundant in supporting the common (DRI) open-source Linux graphics drivers. The old GLX back-ends included DRI1, DRI2, DRISW, Proxy, AGL, and WGL. With Adam's approach, there's just new AGL, EGL, GLX, and WGL back-ends present and understanding the driver interface is left up to Mesa rather than the X.Org Server. This work should also help in supporting the GLAMOR DDX driver properly.

It's hopeful the GLX Rewrite will be ready for the next release -- X.Org Server 1.15 -- but there's still issues to work through with the EGL back-end not being entirely agnostic and Win/Quartz/Proxy support not being done. X.Org Server 1.15 was already delayed to the end of this year this week with hopes that this GLX Rewrite and other interesting code will be able to be merged before the end of October.

For more details there are some rather basic PDF slides plus a video embedded below.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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