# ServicePoint

In [CCCB](https://berlin.ccc.de/), there is a big pixel matrix hanging on the wall. It is called  "Service Point
Display" or "Airport Display".

This crate contains C# bindings for the [servicepoint](https://git.berlin.ccc.de/servicepoint/servicepoint) library based on [servicepoint-binding-uniffi](https://git.berlin.ccc.de/servicepoint/servicepoint-binding-uniffi).

F# is not tested. If there are usability or functionality problems, please open an issue.

## Note on stability

This library is still in early development.
You can absolutely use it, and it works, but expect minor breaking changes with every version bump.

## Notes on differences to rust library

- Performance will not be as good as the rust version:
    - most objects are reference counted.
    - objects with mutating methods will also have a MRSW lock
- You will not get rust backtraces in release builds of the native code
- Panic messages will work (PanicException)

## Installation

Including this repository as a submodule and building from source is the recommended way of using the library.

```bash
git submodule add https://git.berlin.ccc.de/servicepoint/servicepoint-binding-csharp.git
git commit -m "add servicepoint-binding-csharp submodule"
```

After that, add a reference to the ServicePoint project in your `.csproj` and, if applicable, your `.sln`.
```xml
<ItemGroup>
    <ProjectReference Include="servicepoint-binding-csharp/ServicePoint/ServicePoint.csproj"/>
</ItemGroup>
```

That's it!
You do not have to compile or copy the rust crate manually, as building `ServicePoint.csproj` also builds it.

Currently, the project file is hard-coded for Linux and will need tweaks for other platforms (e.g. `.dylib` instead of `.so`).
Feel free to open an issue or a PR with whatever you OS expects.

## Example

```csharp
using System.Threading;
using ServicePoint;

var connection = new Connection("127.0.0.1:2342");
connection.Send(Command.Clear());

connection.Send(Command.Brightness(5));

var pixels = Bitmap.NewMaxSized();
for (ulong offset = 0; offset < ulong.MaxValue; offset++)
{
    pixels.Fill(false);

    for (ulong y = 0; y < pixels.Height(); y++)
        pixels.Set((y + offset) % pixels.Width(), y, true);

    connection.Send(Command.BitmapLinearWin(0, 0, pixels));
    Thread.Sleep(14);
}
```

A full example including project files is available as part of this crate.

## Why is there no NuGet-Package?

NuGet packages are not a good way to distribute native
binaries ([relevant issue](https://github.com/dotnet/sdk/issues/33845)).
Because of that, there is no NuGet package you can use directly.

## Development

Run `./generate-binding.sh` to regenerate the base library. 
The generated source file is checked in.
The CI enforces that generated bindings do not change.

## Everything else

Look at the main project [README](https://git.berlin.ccc.de/servicepoint/servicepoint/src/branch/main/README.md) for
further information.