[PATCH xserver] remove absolute class (resent)

[Simon Thum]

Hi all,

somehow I'm out of luck with send-email and my overly spam-alert email
provider. Sorry for double-posting! Here's the original mail (without
greeting, which somehow got suppressed):



I made an attempt to remove the absolute device class from the server.
It was, to the best of my knowledge, unused and quite misleading since
all is there except for real useage. The actual removal (patch 5+6)
is split up so the API is kept (more or less) for the benefit of
out-of-tree drivers. "More or less" refers to the AbsoluteClassRec/Ptr
pair which is being removed, but no-one out of the server seems to have
used it. The protocol and libXi parts remain untouched so GIMP won't break.

Also, the server is more honest to clients asking for AbsoluteClass
support, i.e. now you should get protocol errors instead of silent
ignorance.

The real removal merits an ABI bump, but TBH I was unsure how to do it
properly and whether or not it's overkill. No driver I'm aware of used it.

A possible alternative would be actually using this stuff, but there's
lots of overlap with existing input properties and the class does x/y
only. The only senario I could imagine was making better use of raw
absolute events, but since we have sub-pixel events that's a
questionable use case.

[PATCH 1/6] xquartz: simplify ChangeDeviceControl
[PATCH 2/6] kdrive: don't pretent to support DEVICE_ABS_* in
ChangeDeviceControl
[PATCH 3/6] xf86: don't pretend to support DEVICE_ABS_* in
ChangeDeviceControl
[PATCH 4/6] simplify ChangeDeviceControl in stubs
[PATCH 5/6] xserver: remove AbsoluteClassRec keeping the ABI
[PATCH 6/6] xserver: remove AbsoluteClass, breaking the A(P|B)I
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