GLAMOR Acceleration For A Faster Xephyr
Written by Michael Larabel in X.Org on 6 February 2014 at 07:53 AM EST. 5 Comments
The work by Intel developer Eric Anholt for accelerating the Xephyr X.Org nested server with GLAMOR has been posted to the X.Org developers' mailing list for review.

Xephyr is the modern approach for easily running an X11 display server that targets a window of an existing X11/X.Org Server -- basically having nested X.Org Server capabilities. With Eric Anholt's work on integrating GLAMOR into the X.Org Server rather than being a standalone 2D-over-OpenGL acceleration library, he's extending it to allow for Xephyr 2D acceleration with GLAMOR. Xephyr normally isn't able to take advantage of 2D acceleration from the host server's DDX driver.

Eric's been working on the GLAMOR-inside-the-X-Server code for a while and this week he's posted the xephyr-glamor series for feedback by fellow X.Org developers. This patch-set converts GLAMOR to using libepoxy for hiding OpenGL vs. OpenGL ES 2.0 dispatch handling differences, adds a new "-glamor" option for running Xephyr with GLAMOR rendering, makes use of GLX swap events to reduce repaints, and allows Xephyr to initialize GLAMOR using OpenGL ES 2.0 with GLX, among other changes to Xephyr and GLAMOR.

This Xephyr feature will hopefully land with time for making the X.Org Server 1.16 release this summer.

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Michael Larabel is the principal author of 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 automated benchmarking software. He can be followed via Twitter or contacted via

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