Touch events within Xephyr

As part of my ongoing work on multi-touch, I have been looking at handling touch gestures within Mutter plugins. Developing a X window manager/shell can be quite a hassle because you are likely to want to do that in a separate X display so your testing doesn't disturb the session where you do the actual coding.

In the past I have used Xephyr to run a nested X display so I can run the window manager as I would run any normal application, but this time I found that Xephyr doesn't forward any XInput2 events right now, which is needed for MT. Having a separate machine where to test is an alternative but it has been quite uncomfortable.

My colleague at Collabora Daniel Stone encouraged me to give it a try and it indeed didn't take much work to get something running, though I still haven't tested it much.

So for the code, here is the Xephyr repo: http://cgit.collabora.com/git/user/tomeu/xserver/log/?h=xephyr-touch

And here the Mutter repo: http://cgit.collabora.com/git/user/tomeu/mutter/log/?h=touch-clutter

Remember that these are early proof-of-concepts, but if you give it a try and want to give feedback, it will be welcome.

As usual, thanks to my employee Collabora for sponsoring this work and letting me share it.

Simple OpenGL ES 2.0 demo

It surprised me how hard it is to find a really simple demo that uses OpenGL ES 2.0, and most of those are for Android or iOS.

So for future googlability, here is one that uses EGL on X and fits in a single, independent file:

http://cgit.freedesktop.org/mesa/demos/tree/src/egl/opengles2/es2tri.c