Meadow.Foundation.Displays.Silk

Display driver for Meadow using Silk.NET and SkiaSharp

The Meadow.Silk library is included in the Meadow.Foundation.Displays.Silk nuget package and is designed for the Wilderness Labs Meadow .NET IoT platform.

This driver is part of the Meadow.Foundation peripherals library, an open-source repository of drivers and libraries that streamline and simplify adding hardware to your C# .NET Meadow IoT applications.

For more information on developing for Meadow, visit developer.wildernesslabs.co.

To view all Wilderness Labs open-source projects, including samples, visit github.com/wildernesslabs.

Installation

You can install the library from within Visual studio using the the NuGet Package Manager or from the command line using the .NET CLI:

dotnet add package Meadow.Foundation.Displays.Silk

Usage

public class Program
{
static SilkDisplay? display;
static MicroGraphics graphics = default!;

static PixelBufferBase image = default!;

public static void Main()
{
    Initialize();
    Run();

    Thread.Sleep(Timeout.Infinite);
}

public static void Initialize()
{
    display = new SilkDisplay(640, 480, displayScale: 1f);

    graphics = new MicroGraphics(display)
    {
        CurrentFont = new Font16x24(),
        Stroke = 1
    };

    image = (PixelBufferBase)LoadJpeg();
}

public static void Run()
{
    Task.Run(() =>
    {
        var grayImage = image.Convert<BufferGray8>();

        var scaledImage = image.Resize<BufferGray8>(320, 320);

        var rotatedImage = image.Rotate<BufferGray8>(new Meadow.Units.Angle(60));

        graphics.Clear();

        //draw the image centered
        graphics.DrawBuffer((display!.Width - rotatedImage.Width) / 2,
            (display!.Height - rotatedImage.Height) / 2, rotatedImage);

        graphics.Show();
    });

    display!.Run();
}

static IPixelBuffer LoadJpeg()
{
    var jpgData = LoadResource("maple.jpg");

    var decoder = new JpegDecoder();
    var jpg = decoder.DecodeJpeg(jpgData);

    Console.WriteLine($"Jpeg decoded is {jpg.Length} bytes, W: {decoder.Width}, H: {decoder.Height}");

    return new BufferRgb888(decoder.Width, decoder.Height, jpg);
}

static byte[] LoadResource(string filename)
{
    var assembly = Assembly.GetExecutingAssembly();
    var resourceName = $"Silk_Image_Sample.{filename}";

    using var stream = assembly.GetManifestResourceStream(resourceName);
    using var ms = new MemoryStream();
    stream?.CopyTo(ms);
    return ms.ToArray();
}
}

How to Contribute

• Found a bug? Report an issue
• Have a feature idea or driver request? Open a new feature request
• Want to contribute code? Fork the Meadow.Foundation repository and submit a pull request against the develop branch

Need Help?

If you have questions or need assistance, please join the Wilderness Labs community on Slack.

About Meadow

Meadow is a complete, IoT platform with defense-grade security that runs full .NET applications on embeddable microcontrollers and Linux single-board computers including Raspberry Pi and NVIDIA Jetson.

Build

Use the full .NET platform and tooling such as Visual Studio and plug-and-play hardware drivers to painlessly build IoT solutions.

Connect

Utilize native support for WiFi, Ethernet, and Cellular connectivity to send sensor data to the Cloud and remotely control your peripherals.

Deploy

Instantly deploy and manage your fleet in the cloud for OtA, health-monitoring, logs, command + control, and enterprise backend integrations.