On Thu, Feb 02, 2012 at 06:54:23PM +0000, Bastien Nocera wrote:
> Heya,
> 
> Instead of hitting just Peter with this sort of question[1], I'm
> guessing that there are quite a few people on the list that could answer
> my questions (or point me to the relevant Wiki pages).
> 
> For the fun that's about to be had with the Intuos4 LEDs, a couple of
> questions:
> - is there/will there be a way to avoid getting/updating/setting all the
> LEDs when changing one? What format do the LEDs graphics needs to be in?

I think this was mentioned in another thread but "LEDs" are the little ones
next to the ring and OLEDs are the ones that can display pretty pictures.
I don't really have a good idea on the OLED approach yet. From a driver's
POV the best approach may be to set a property to a Pixmap, with the driver
the converting to the actual format the kernel wants.
There are plenty of tools that can convert from $FILEFORMAT to pixmap, and
IIRC we had a xsetwacom patch for this at some point.

> - can wacom provide a library of pixmaps for us to use for the LEDs, so
> that they look like they already do on Windows or MacOS X, or would we
> have the time consuming task of re-doing them? If the problem is simply
> that the data isn't easily available, we can certainly try and nab it
> from the other drivers.
> - will we need to handle rotation ourselves, and rotate the LED drawings
> ourselves?

yes, whatever triggers the rotation should rotate the OLEDs.

> - what metadata does one need to associate a button with an LED
> placement?

I'm not sure what you mean here, can you elaborate?

> - Any ideas what a sane API would look like (eg. if you didn't have to
> use device properties, how would you have implemented it? :)

if it's for libwacom, I'd prefer a simple path-based API that you point to
the png.

> -How does one grab events from the touchring when used with the stylus?
> xev refuses to show anything.
> 
> Cheers
> 
> [1]: Instead I get him to check whether we support all 22 "mouse
> buttons" on the Cintiq 21UX2 :)
> https://bugs.freedesktop.org/show_bug.cgi?id=45557

fixed :)
 
Cheers,
  Peter

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