[Bug 11846] tablet pressure sensitivity not working in Sai and many other key graphic applications

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=11846





--- Comment #23 from John Klehm <xixsimplicityxix at gmail.com>  2008-04-16 03:15:20 ---
I've looked into this sai business a bit further. SAI is different in how it
captures the tablet messages.  I believe that openCanvas and Photoshop grab
packets by repeatedly using WTPacketsGet, the "active" way to get tablet info.

Based on my wintab32 logs SAI uses the "passive" way to get tablet info in that
it expects to find tablet messages (WT_PACKET) coming through Windows Messaging
channels.  I think this is where our wintab breaks down as when I run +msg logs
I don't see any WT_PACKETS coming through.

Of course this is just my theory and I can't confirm it for sure yet but in
case I don't get back to this in a couple weeks it could maybe help someone
out.

See the wintab spec[1] page 5, section 13 "Polling" for the two different ways
of monitoring tablet info.


[1] http://www.wacomeng.com/devsupport/downloads/pc/wt1pt1.zip


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