WebHID is a new technology allowing Magma to get pressure sensitivity directly from your tablet. Support for it is still in Beta so if you'd like to try it out, please shoot us an email at [email protected] with your Magma account email.
Once we activate it, you need to first allow your browser to access HID devices. Connect your drawing tablet and then issue the following command:
# this setting will vanish after reboot - it's just a test
sudo chmod 664 /dev/hidraw*
Now open Magma and click on "Edit" and then the "Connect Stylus" button, then select your drawing tablet from the list.
If everything goes well, you now have working pressure sensitivity.
Making the setting permanent
You will have to set the permissions with udev to be correct, create a file in the folder:
/etc/udev/rules.d/, and name it (e.g.)
In the file, you will need this line:
KERNEL=="hidraw*", SUBSYSTEM=="hidraw", MODE="0664", GROUP="plugdev"
Now also make sure that both the group exists and your user belongs to it:
sudo groupadd plugdev sudo gpasswd -a $(whoami) plugdev
Now unplug and plug again your tablet and check the permissions with
ls /dev/hidraw* -lah
You might also need to logout and log back in if your user did not belong to the
plugdev group before.
Let us know if it worked!
Please send your tablet model and Linux distro version so we can update the list below.
Known to work
Wacom Intuos5 touch M (openSUSE Tumbleweed, Chrome 91)