Use your tablet as graphic tablet/touch screen on your computer.

Weylus turns your tablet or smart phone into a graphic tablet/touch screen for your computer!

Weylus in action with Xournal++:

Features

Control your mouse with your tablet

Mirror your screen to your tablet

The above features are available on all Operating Systems but Weylus works best on Linux. Additional features on Linux are:

Support for a stylus/pen (supports pressure and tilt)

Multi-touch: Try it with software that supports multi-touch, like Krita, and see for yourself!

Capturing specific windows and only drawing to them

Faster screen mirroring

Installation

Just grab the latest release for your OS from the releases page and install it on your computer. No apps except a modern browser are required on your tablet.

Running

Start Weylus, preferably set a password in the password box and press the Start button. This will start a webserver running on your computer. To control your computer with your tablet you need to open the url http://<address of your computer>:<port set in the menu, default is 1701>, if possible Weylus will display to you the url you need to open.

Linux

To enable stylus and multi-touch support /dev/uinput needs to be writable by Weylus! To make /dev/uinput permanently writable by your user you can do the following:

sudo useradd -r -U -s /usr/bin/nologin uinput sudo usermod -aG uinput $USER echo 'KERNEL=="uinput", MODE="0660", GROUP="uinput", OPTIONS+="static_node=uinput"' \ | sudo tee /etc/udev/rules.d/60-weylus.rules sudo udevadm control --reload sudo udevadm trigger macOS

Weylus needs some permissions to work properly, make sure you enable:

Incoming connections

Screen capturing

Controlling your desktop

Windows

I am afraid but as of now Weylus has not been tested on Windows.

That is it, start drawing!

Building

To build Weylus you need to install Rust and Typescript. cargo build builds the project. On windows make sure to run the Typescript compiler in the project root first. On Linux some additional dependencies are required to build Weylus. On Debian or Ubuntu they can be installed via:

apt-get install -y libx11-dev libxext-dev libxft-dev libxinerama-dev libxcursor-dev libxrender-dev libxfixes-dev libxtst-dev How does this work? Stylus/Touch

Modern browsers expose so called PointerEvents that can convey not only mouse but additionally stylus/pen and touch information. Weylus sets up a webserver with the corresponding javascript code to capture these events. The events are sent back to the server using websockets. Weylus then processes these events using either the generic OS independent backend, which only supports controlling the mouse or on Linux the uinput backend can be used. It makes use of the uinput Linux kernel module which supports creating a wide range of input devices including mouse, stylus and touch input devices.

Screen mirroring & window capturing

Either the generic backend is used which is less efficient and only captures the whole screen or on Linux xlib is used to connect to the X-server and do the necessary work of getting window information and capturing the window/screen. To make things fast the "MIT-SHM - The MIT Shared Memory Extension" is used to create shared memory images using XShmCreateImage. The images captured are then encoded to the PNG format using the library mtpng for greater speed. Finally the PNG binary data are encoded to base64 and sent back to the connected browser, which then loads them to an image tag and draws them to a canvas element. The latencies and loads on my machine are reasonable but I am open to improvements here.

Can your Android Tablet be Used as a Cintiq