Windows 10 Pen input #57538
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Reference: blender/blender#57538
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System Information
Windows 10 Home build 17134
Toshiba convertible with touch/pen screen (Wacom 0x056A, 0x50A2, driver/utility 6.3.31-4 aka 7.3.4.48, wintab.dll 1.0.5.9)
Blender Version
Broken: 2.79b
f4dc9f9d68
(2.80 alpha also)Short description of error
Grease pencil stroke does not start on touch, but only after some time or distance (not clear)
Exact steps for others to reproduce the error
Start blender
Open default
Draw with any grease pencil (radial strokes from one starting point, or zig zag lines
Details
I have been digging around a little and found a few other reports of similar issues (also see further down, some blender issue reports):
https://blender.stackexchange.com/questions/118019/stylus-delay-in-grease-pencil
https://blender.stackexchange.com/questions/120009/painting-problem-when-using-pen-in-blender
The latter points to https://www.reddit.com/r/Windowsink/comments/8508fi/controlling_pen_behavior_in_windows_10/ from March 2018 where Microsoft inform about a Windows update where a registry "hack" can affect (revert?) the changed behaviour (LegacyPenInteractionModel).
However, this did not work for me (in addition to disable some Flick and other Pen options as well as Blender's Continuous Grab and trying newer/older Wacom divers).
So I can't use the pen input I'd like to use very much for Grease Pencil (unless I boot Ubuntu and do it there...).
I found other reports that might be related, notably
https://developer.blender.org/T55589 Microsoft Surface pens does not send first events when moves
and others
https://developer.blender.org/T53601 Microlag on tablet pc.
https://developer.blender.org/T53621 Surface Book 2 pen pressure sensitivity issue
https://developer.blender.org/T57151 Graphics Tablet Problem
So it might be that Windows broke something, but blame is not helping, so I would like to ask if someone could revisit the pen input handling to figure out the current "state of the art" - whether this is really a bug by Microsoft and a workaround is available or maybe some API has changed that should be supported by Blender (WinTab apparently is at V1.0.5.9). Other programs seem to have no problem with the changes - are they using a workaround or new API?
Of course I'd be glad contribute mouse/touch/pen event logs etc. for my hardware if you let me know how (don't have a build environment).
I was not able to find a program to test mouse/touch/pen events, but came across some API links and further bug reports.
https://docs.microsoft.com/en-us/windows/desktop/tablet/system-events-and-mouse-messages
https://docs.microsoft.com/en-us/windows/desktop/tablet/listening-to-system-events
https://docs.microsoft.com/en-us/windows/desktop/tablet/flicks-gestures
https://github.com/Microsoft/vscode/issues/36492 Digital Pen input is interpreted as touch instead of mouse after Windows 1709 Fall Creator Update #36492
https://www.reddit.com/r/Windowsink/comments/8emum0/update_fix_now_available_unexpected_application/
https://www.reddit.com/r/Windowsink/comments/8gsjup/additional_control_for_pen_behavior_in_legacy/
https://phabricator.kde.org/D8801?id=23714 WinInk: Simulate native mouse events for handled pen events (Krita)
I will add a video/gif of the behaviour later when I get a chance.
Added subscriber: @bugreporter
#58561 was marked as duplicate of this issue
Added subscriber: @midije-2
Closed as duplicate of #55589
Added subscriber: @a_blender_user
I find how to resolve this problem
you just setting follow my picture
my English is terrible
#55589 has not been resolved.
I am using the Microsoft Surface Book with Microsoft Pen. The first events still do not show in Grease Pencil drawings.
After it was announced that it was resolved, I downloaded builds after January 14 and still have the same problem.
Is there a certain build I should be using that has the fix?