4 ms·

You can build the gtk3 dev branch of gimp and it does kinda work :D meanwhile Krita: "We can probably postpone worrying about Wayland on Linux for another year

You can build the gtk3 dev branch of gimp and it does kinda work :D meanwhile Krita: "We can probably postpone worrying about Wayland on Linux for another year" https://krita.org/en/about/krita-roadmap-2017-2019/ https://krita.org/en/about/krita-roadmap-2017-2019/ >_<

pzone 9y ago
Krita puts a heroic effort into bug workarounds for faulty graphic tablet drivers. Porting to Wayland/libinput will be very much nontrivial for them. They're guaranteed to run into Qt and KDElibs bugs as well. At a minimum, they should wait until Plasma is Wayland by default. Otherwise they're just slogging into a buggy mess.
- boudewijnrempt 9y ago
  Exactly -- I couldn't have put it better :-)
- floatboth 9y ago
  But I don't use it for painting with a tablet! I just want to crop screenshots and draw arrows on them. On a HiDPI screen, without the whole app being blurry. Why not provide a --no-tablets-i-just-want-wayland option that would not force the X backend?
  - boudewijnrempt 9y ago
    Because that would be a very silly thing to spend time on? Time taken away from working on things that Krita is meant for?
    - floatboth 9y ago
      X11 is a silly thing to spend time on :P So turns out it's easy to turn off X11 in the build files https://github.com/myfreeweb/krita-wayland/commit/8ab43e3e1c9d45a61b0aa8d84e99896f375aca53 https://github.com/myfreeweb/krita-wayland/commit/8ab43e3e1c... and it does work on Wayland now!
- zanny 9y ago
  Just from someone who has dug too deep trying to figure out what it would take to make this happen, KWin on Wayland right now does not support graphics tablets at all. It needs to be wired up to support them still. And we still don't have a Wayland input KCM, but I think someone is working on that for 5.13. I think. That being said, I have a Monoprice tablet I use through libinput. I used the wacom driver for a bit but libinput gives me enough to do what I want (I have to say having to do matrix math to constrain the screen size so the tablet is in 1 to 1 correlation to the screen was a bit rough on the UX front). Libinput is pretty feature complete on tablet support in the basic use cases, it is just missing a bunch of the tunables from xsetwacom. The Digimend project has done an amazing job providing driver support for a lot of non-wacom tablets as well. It will be interesting if its Wacom tablets that are the pain point on Wayland. I don't have or know anyone with one to confirm or deny if the libinput support is up to par. If I had the confidence to know what I'm doing (and I don't, I've never touched the Kwin / Wayland / input stacks on Linux at all) I'd try wiring in tablets to Kwin, but you probably want that first - which is still at least a release or two out at best - before you even think about trying to port your KDE Painting app to Wayland.

pzone 9y ago

Krita puts a heroic effort into bug workarounds for faulty graphic tablet drivers. Porting to Wayland/libinput will be very much nontrivial for them. They're guaranteed to run into Qt and KDElibs bugs as well. At a minimum, they should wait until Plasma is Wayland by default. Otherwise they're just slogging into a buggy mess.

boudewijnrempt 9y ago
Exactly -- I couldn't have put it better :-)
floatboth 9y ago
But I don't use it for painting with a tablet! I just want to crop screenshots and draw arrows on them. On a HiDPI screen, without the whole app being blurry. Why not provide a --no-tablets-i-just-want-wayland option that would not force the X backend?
- boudewijnrempt 9y ago
  Because that would be a very silly thing to spend time on? Time taken away from working on things that Krita is meant for?
  - floatboth 9y ago
    X11 is a silly thing to spend time on :P So turns out it's easy to turn off X11 in the build files https://github.com/myfreeweb/krita-wayland/commit/8ab43e3e1c9d45a61b0aa8d84e99896f375aca53 https://github.com/myfreeweb/krita-wayland/commit/8ab43e3e1c... and it does work on Wayland now!
zanny 9y ago
Just from someone who has dug too deep trying to figure out what it would take to make this happen, KWin on Wayland right now does not support graphics tablets at all. It needs to be wired up to support them still. And we still don't have a Wayland input KCM, but I think someone is working on that for 5.13. I think. That being said, I have a Monoprice tablet I use through libinput. I used the wacom driver for a bit but libinput gives me enough to do what I want (I have to say having to do matrix math to constrain the screen size so the tablet is in 1 to 1 correlation to the screen was a bit rough on the UX front). Libinput is pretty feature complete on tablet support in the basic use cases, it is just missing a bunch of the tunables from xsetwacom. The Digimend project has done an amazing job providing driver support for a lot of non-wacom tablets as well. It will be interesting if its Wacom tablets that are the pain point on Wayland. I don't have or know anyone with one to confirm or deny if the libinput support is up to par. If I had the confidence to know what I'm doing (and I don't, I've never touched the Kwin / Wayland / input stacks on Linux at all) I'd try wiring in tablets to Kwin, but you probably want that first - which is still at least a release or two out at best - before you even think about trying to port your KDE Painting app to Wayland.