/**
@mainpage

This is the libei/libeis/liboeffis API reference. For the protocol
documentation see [here](https://libinput.pages.freedesktop.org/libei/).

libei provides three different libraries, `libei` for clients that need to
emulate or capture input events and `libeis` for servers that manage those
input events (read: compositors). It also provides the `liboeffis` to
abstract connecting to the XDG RemoteDesktop portal.

A common setup looks like this:

```
                   +-----------------------+       +----------------+
physical devices - | libinput | compositor | ----- | Wayland client |
                   +----------+------------+   ^   +----------------+
                              |   libeis   |   |
                              +------------+   Wayland events
                                    ||
                                    || <-- EI events
                                    ||
                              +-------------+
                              |    libei    |
                              +-------------+
                              | application |
                              +-------------+
```

Notably, the process using `libeis` is **in control of all input devices**. A
`libei` client can send events but it is up to the EIS implementation to
process them.

The two libraries are independently and usually a process uses either `libei` or
`libeis` but not both.

@section sec-ei 🥚 EI - the client implementation

The `libei` library is the component used by clients that want to emulate
input events. It provides the required methods to connect to an EIS
implementation, query for input devices available to the client, and send
input.

The API documentation for EI is available at @ref libei.

@section sec-eis 🍦 EIS - the server implementation

The `libeis` library is the component used by processes that handle input
events. It provides the required methods to set up seats and input devices,
accept `libei` client connections, and receive input events from those
clients.

The API documentation for EI is available at @ref libeis.

@section sec-oeffis 🚌 Oeffis - a XDG RemoteDesktop portal wrapper API

liboeffis is a helper library for applications that do not want to or cannot
interact with the XDG RemoteDesktop DBus portal directly. It abstracts the
DBus connection handling into a small and simple API.

The API documentation for EI is available at @ref oeffis.

@section examples Examples

Please see the [demo programs](https://gitlab.freedesktop.org/libinput/libei/-/tree/main/tools)
in the git repository.

The `eis-demo-client` is a minimal client that connects to an EIS
implementation and sends events.

The `eis-demo-server` is a minimal EIS implementation that accepts all
requests and prints them to screen.

The `oeffis-demo-tool` is a minimal implementation to connect to the XDG
RemoteDesktop portal and request an fd that could then be passed to
ei_setup_backend_fd().

@section building_against Building against libei, libeis or liboeffis

libei, libeis and liboeffis provide
[pkg-config](https://www.freedesktop.org/wiki/Software/pkg-config/) files.
Software that uses libei, libeis or liboeffis should use pkg-config and the
`PKG_CHECK_MODULES` autoconf macro or the `dependency()` function in meson.

Otherwise, the most rudimentary way to compile and link a program against
libei, libeis or liboeffis is:

@verbatim
    gcc -o myprogram mylibeiclient.c `pkg-config --cflags --libs libei-1.0`
    gcc -o myprogram myEISimplementation.c `pkg-config --cflags --libs libeis-1.0`
    gcc -o myprogram myimpl.c `pkg-config --cflags --libs liboeffis-1.0`
@endverbatim

For further information on using pkgconfig see the pkg-config documentation.

@section About

Documentation generated from git commit [__GIT_VERSION__](https://gitlab.freedesktop.org/libinput/libei/commit/__GIT_VERSION__)

*/