IPTSDaemon: Userspace for Surface touch Screen Workflow with C++

IPTSDaemon

This is the user space IPTS daemon for Surface touch screen process

It is supposed to be used with BigSurface.kext to enable touch screen & stylus support on macOS.

Raw touching data is sent by the kernel driver to be processed in user space then touch & stylus hid events are sent back to the kernel.

The code is ported from linux-surface/iptsd and quo/iptsd

Warning, the processing algorithm is NOT optimised enough yet and it consumes around 10% cpu usage when fingers are detected, 4% or less when stylus is detected

Use this under your own consideration! Touching process is very energy consuming.

To install the daemon, simply run the script install_daemon.sh and all files needed will be copied to desired locations. After installation IPTSDaemon will be running when macOS starts.

You will also need to install two dylib(fmt and inih) and a daemon(sleepwatcher) for it to run properly.

Homebrew is recommended to install them:

Install Homebrew

in Terminal, execute brew install fmt inih sleepwatcher

Then, in order to resume the service after wakeup, you need to configure sleepwatcher:

1. Create ~/.sleep and ~/.wakeup files.
2. In .sleep: launchctl unload /Library/LaunchDaemons/com.xavier.IPTSDaemon.plist 2>/dev/null
3. In .wakeup: sleep 2 && launchctl load /Library/LaunchDaemons/com.xavier.IPTSDaemon.plist

For example, you can:

cd ~
touch .sleep
touch .wakeup
echo "launchctl unload /Library/LaunchDaemons/com.xavier.IPTSDaemon.plist 2>/dev/null" >> .sleep
echo "sleep 2 && launchctl load /Library/LaunchDaemons/com.xavier.IPTSDaemon.plist" >> .wakeup

If you want to disable touch when palm is detected or stylus is detected or near the stylus, go to config folder and find your device's config, add this:

[Touch]
DisableOnPalm = true

[Stylus]
# disable touch when using stylus
DisableTouch = true
# disable touch near the stylus
Cone = true

Enable on screen keyboard on login screen

To enable the on screen keyboard to show up on the login screen you need to change your Accessibility settings in the System Preferences>Users & Groups>Login Options>Accessibility Options put a checkbox on the Accessibility Keyboard.

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Author: Xiashangning
Source code: https://github.com/Xiashangning/IPTSDaemon
License: GPL-3.0 license

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