Compiz Support For Multi-Pointer X
Written by Michael Larabel in X.Org on 9 July 2008 at 08:22 AM EDT. 8 Comments
In May we shared that Multi-Pointer X (or MPX for short) was entering the mainline X server. While it was merged to master that month, X Server 1.5 was already branched out and therefore it won't appear in X.Org 7.4, but it will appear in X Server 1.6 (X.Org 7.5) until next year.

While it's now in the mainline branch, Peter Hutterer, the chief developer of MPX, hasn't stopped there. One of his most recent accomplishments was modifying Compiz to support Multi-Point X. In his personal git repository, he now has a custom version that does support multiple inputs and multiple events occurring simultaneously while still enjoying the wobbly windows and other desktop effects presented by this window manager. To do this, Peter had to rewrite portions of the Compiz Core to support XI2 (X Input 2) by replacing some functions and listening to X Input events instead of internal Compiz core events. Additional work was then also required to support the Compiz plug-ins on MPX.

In a blog post by Peter explaining this Compiz+MPX work, he mentions that many details are left in an unfinished state. Unfortunately, due to time commitments, he won't be continuing this work with an MPX-aware XI2-supportive version of Compiz. Perhaps someone will step up to the plate and finish it off and down the road be able to merge it into the mainline Compiz.
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Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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