https://github.com/thenickdude/wacom-qemu
Emulated Wacom tablet devices for QEMU
https://github.com/thenickdude/wacom-qemu
drivers qemu wacom
Last synced: 2 months ago
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Emulated Wacom tablet devices for QEMU
- Host: GitHub
- URL: https://github.com/thenickdude/wacom-qemu
- Owner: thenickdude
- License: other
- Created: 2020-11-11T11:19:42.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2021-09-19T01:36:58.000Z (over 3 years ago)
- Last Synced: 2025-03-25T14:38:57.059Z (3 months ago)
- Topics: drivers, qemu, wacom
- Language: C
- Homepage:
- Size: 14.6 KB
- Stars: 6
- Watchers: 3
- Forks: 0
- Open Issues: 1
-
Metadata Files:
- Readme: Readme.md
- License: LICENSE
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README
# Emulated Wacom tablets for QEMU
These devices simulate the basic functionality of a Wacom Bamboo or Wacom Intuos 5 graphics tablet
in QEMU. I have built this as an alternative to the support that QEMU already has for simulating a Wacom "PenPartner"
tablet, because this tablet model is positively ancient and isn't well-supported by guest drivers anymore.
The goal of this project is to allow me to test out official Wacom drivers (macOS / Windows) for tablets that I don't
actually own, for my [Wacom Driver Fix](https://github.com/thenickdude/wacom-driver-fix) project that fixes bugs in
Wacom's abandoned macOS drivers.
The Intuos 5 model emulates an Intuos 5 Touch Medium PTH-650 (but with no touch support). The Bamboo tablet is a Bamboo
Pen CTL-460.
The emulated devices work on Linux (with `input-wacom`), Windows 10 and macOS Catalina (both using Wacom's official drivers).
There's probably nobody else in the world who will find this useful, but I'm posting it here just in case.
## Adding this to QEMU
Add the two drivers `dev-wacom-bamboo.c` and `dev-wacom-intuos-5.c` into QEMU's sourcecode at `/hw/usb`, alongside the
`dev-wacom.c` driver that is already included with QEMU. Then edit `meson.build` in that same directory to add the new
drivers to the list of object files:
Before:
```
softmmu_ss.add(when: 'CONFIG_USB_TABLET_WACOM', if_true: files('dev-wacom.c'))
```
After:
```Makefile
softmmu_ss.add(when: 'CONFIG_USB_TABLET_WACOM', if_true: files('dev-wacom.c', 'dev-wacom-bamboo.c', 'dev-wacom-intuos-5.c'))
```
Then build QEMU from source.
## Using the new tablet devices
You can attach one of the new tablets to your VM the same way as with the built-in `usb-wacom` device. The new tablets are named
`usb-wacom-tablet-intuos-5` and `usb-wacom-tablet-bamboo`, e.g.:
qemu -device usb-wacom-tablet-intuos-5,id=wacom
I've dropped support for the tablet's fallback HID Mouse mode, which is normally used when no Wacom tablet drivers
are loaded in the guest. Instead, QEMU will send your mouse events to its next input driver in the stack (likely the PS/2
tablet device) until the guest's Wacom driver is loaded.
(You can tell if you're using the proper Wacom device rather than the PS/2 fallback, because your scrollwheel will stop
functioning, since I didn't add support for it)
You can override the vendorid and productid of the device like so (but the tablet may not provide the features that are
expected of it by the guest's drivers, and fail to operate):
qemu -device usb-wacom-tablet-bamboo,id=wacom,vendorid=0x056a,productid=0x0069
When the cursor is idle for 3 seconds, the virtual tablet will simulate the pen leaving proximity, then it'll simulate
a re-enter the next time the cursor moves.
Your scrollwheel controls the simulated pen pressure, but it seems like you can't change the pressure while the pen is
held down, maybe a QEMU quirk.