On Sat, Sep 29, 2012 at 3:19 PM, Thomas Jaeger <thjae...@gmail.com> wrote: > The X server has had multi-touch support for a while now, and most newer > wacom devices seem to have some limited multi-touch capability, so it > would be nice to take advantage of that. So far there is no support for > multi-touch in the xf86-input-wacom driver, although the kernel driver > does support it (when paired with xf86-input-evdev). So there are two > possible routes for getting multi-touch support with wacom: > > (1) Add multi-touch support to xf86-input-wacom > (2) Ditch xf86-input-wacom and use evdev instead > > Option (1) causes unnecessary code duplication in my opinion (and it > doesn't seem like anybody is willing to do the legwork for this anyway), > so that leaves (2). But evdev is not ready to take over the stylus part > of the driver right now: it doesn't filter out spurious events (that > arguably should be caught by the kernel driver anyway), it doesn't treat > pressing multiple buttons correctly and it lacks many of the options the > wacom driver currently has. > But as far as I know, the touch driver doesn't have any such problems. > The only thing it currently does that evdev doesn't is that dreadful > driver-side gesture recognition, which could (and should!) trivially be > replaced by an X client [1]. > > With the patch allowing the wacom driver not to grab the event device > that's been posted to the list, it's now possible to get the best of > both worlds: To use xf86-input-wacom for the stylus and > xf86-input-evdev for touch. This seems to be working fine for me > (modulo some bugs in the X server that Ubuntu quantal currently ships > with), so I'm wondering if this should be the way forward. > > Tom > > [1] > http://who-t.blogspot.com/2012/01/multitouch-in-x-touch-grab-handling.html >
I log into gmail to make sure my multitouch patches have sent successfully, and find this :) Talk about timing! I don't have much time to talk right now, but having evdev handle touch is something I've thought about. Its been easier to have all the wacom-related code in one spot, but there are some advantages to splitting. Jason --- When you're rife with devastation / There's a simple explanation: You're a toymaker's creation / Trapped inside a crystal ball. And whichever way he tilts it / Know that we must be resilient We won't let them break our spirits / As we sing our silly song. ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://ad.doubleclick.net/clk;258768047;13503038;j? http://info.appdynamics.com/FreeJavaPerformanceDownload.html _______________________________________________ Linuxwacom-devel mailing list Linuxwacom-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxwacom-devel
