This is zen, the Hackable X server. In just 5500 lines of Common Lisp. INSTRUCTIONS : You will need : Linux. A decent OpenGL driver, and therefore, unfortunately, a running X server :) (to create a GLX context) SBCL with cl-opengl, CFFI, CLX, Skippy, CL-PPCRE, bordeaux-threads Starting zen : 1) Identify the mouse and keyboard devices /dev/input/event<n> by reading /proc/bus/input/devices. Modify your input-devices.lisp accordingly. 2) sudo chmod ugo+r /dev/input/* 3) In SBCL , (compile-file "data/keys") 4) Load "start.lisp" in sbcl 5) (start) ... and if (when) you crash : 6) (rst) Testing apps : in a terminal, export DISPLAY=127.0.0.1:3 Then start your app. FUN WITH ZEN The 3 most interesting/fun things to hack on right now are : - Optimization. The low hanging fruit is here for you to pick up :) (require 'sb-sprof) (sb-sprof:start-profiling :sample-interval 0.001 :threads :all :sampling t)) <run a slow app> (sb-sprof:stop-profiling) (sb-sprof:report) <see what happens> - Simplifying : zen could definitely become even leaner than it is now. - XRender implementation (but potentially a big job) [Of course, there are also a large number of work items to turn zen into a 'production server', but that was never the point ! ] LIMITATIONS You will notice that zen is quite slow and buggy. Please feel free to report : zen crashes, and app crashes/exits that could be caused by X protocol bugs. Most noticeable issing features : - All kinds of grabs - Various old fashioned rendering requests : CopyPlanes ; Arcs, and more - Most GC fields are ignored - see also a whole section of unimplemented requests. * The bad (do not read this code !) : Font support : no use improving on this, as modern apps render them client-side anyway. SW cursor : no use improving on this either, this is a hack that wouldn't belong in a production server. CONTACT baccou@normalesup.org All the files in this package are (c) 2011 Pierre-Yves Baccou, unless specified otherwise.