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Fix T43367: Non-wacom tablets broken on Blender in linux? 

Looks like with some versions of Xlib (at least the 1.6.2 currently used on Debian testing)
and/or evdev generic driver (2.9.0 currently on Debian testing), you have to also 'select'
DeviceButton1Motion with the extended tablet's motion event, otherwise you won't get any
tablet motion event once pen is pressed, leading to no pressure (each stroke keeping its
init pressure until the end). Crap!
This commit is contained in:
Bastien Montagne 2015-01-27 16:17:27 +01:00
parent 77848f23a4
commit 0d5ebabe43
Notes: blender-bot 2023-02-14 09:35:28 +01:00 
Referenced by issue #43367, Non-wacom tablets broken on Blender in linux?
1 changed files with 9 additions and 0 deletions
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9
intern/ghost/intern/GHOST_WindowX11.cpp
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@ -573,9 +573,16 @@ void GHOST_WindowX11::initXInputDevices()
XEventClass xevents[10], ev;
int dcount = 0;
/* With modern XInput (xlib 1.6.2 at least and/or evdev 2.9.0) and some 'no-name' tablets
* like 'UC-LOGIC Tablet WP5540U', we also need to 'select' Button1 for motion event,
* otherwise we do not get any tablet motion event once pen is pressed... See T43367.
*/
if (xtablet.StylusDevice) {
DeviceMotionNotify(xtablet.StylusDevice, xtablet.MotionEvent, ev);
if (ev) xevents[dcount++] = ev;
DeviceButton1Motion(xtablet.StylusDevice, xtablet.MotionEvent, ev);
if (ev) xevents[dcount++] = ev;
ProximityIn(xtablet.StylusDevice, xtablet.ProxInEvent, ev);
if (ev) xevents[dcount++] = ev;
ProximityOut(xtablet.StylusDevice, xtablet.ProxOutEvent, ev);
@ -584,6 +591,8 @@ void GHOST_WindowX11::initXInputDevices()
if (xtablet.EraserDevice) {
DeviceMotionNotify(xtablet.EraserDevice, xtablet.MotionEvent, ev);
if (ev) xevents[dcount++] = ev;
DeviceButton1Motion(xtablet.StylusDevice, xtablet.MotionEvent, ev);
if (ev) xevents[dcount++] = ev;
ProximityIn(xtablet.EraserDevice, xtablet.ProxInEvent, ev);
if (ev) xevents[dcount++] = ev;
ProximityOut(xtablet.EraserDevice, xtablet.ProxOutEvent, ev);