Re: wstablet API proposal

[Iain Hibbert <plunky%rya-online.net@localhost>]

On Sat, 12 Jul 2008, Jason Beaudoin wrote:

> Current Tablet Capabilities:
> (what do we need to support)

Just out of interest, would wstablet also encompass touchscreen support?

> Adding a field to wscons_event will break any code using the structure,
> and require a rebuild (including the Xserver and various packages that
> utilize wscons_event).

Is there any other place that it is used by userland that would cause
incompatibilities than ioctl(WSMUXIO_INJECTEVENT)?  If its just that, its
not so difficult to version the ioctl so that old and new code works
fine with a new field added..

#define WSMUXIO_INJECTEVENT_OLD _IOW('W', 96, struct wscons_event_old)
#define WSMUXIO_INJECTEVENT     _IOW('W', 96, struct wscons_event)

        struct wscons_event ev;

        switch(cmd) {
        case WSMUXIO_INJECTEVENT_OLD:
                memset(&ev, 0, sizeof(ev));
                /* fall through */
        case WSMUXIO_INJECTEVENT:
                copyin(data, &ev, IOCPARM_LEN(cmd));
                [...]

?

iain