Unable to load shared library 'libSkiaSharp' exception occurs using DOT NET 8 AWS Lambda

[pandi123]

Description

We have created the SKBitmap and drawn a rectangle, circle, and line in .NET using AWS Lambda. We encountered an issue while using SkiaSharp.NativeAssets.Linux NuGet in an AWS Lambda - we faced the 'Unable to load shared library 'libSkiaSharp' exception. However, this issue does not occur when using .NET6 AWS Lambda.

Platform: AWS Lambda Visual Studio version: 2022 .NET version : .NET8 SkiaSharp version : 2.88.6

Code

The best way to share code for larger projects is a link to a GitHub repository: https://github.com/user/repo/tree/bug-123

But, you can also share a short block of code here:

public string FunctionHandler( ILambdaContext context)
{
     //Define the image dimensions
     int width = 800;
     int height = 600;
     string base64String;
 
     //Create a new bitmap
     using (var bitmap = new SKBitmap(width, height))
     {
         // Create a canvas to draw on the bitmap
         using (var canvas = new SKCanvas(bitmap))
         {
             // Clear the canvas with a white color
             canvas.Clear(SKColors.White);
 
             // Define the paint for drawing shapes
             var paint = new SKPaint
             {
                 Color = SKColors.Blue,
                 IsAntialias = true,
                 Style = SKPaintStyle.Stroke,
                 StrokeWidth = 5
             };
 
             // Draw a rectangle
             var rect = new SKRect(100, 100, 300, 300);
             canvas.DrawRect(rect, paint);
 
             // Draw a circle
             paint.Color = SKColors.Red;
             canvas.DrawCircle(400, 400, 100, paint);
 
             // Draw a line
             paint.Color = SKColors.Green;
             canvas.DrawLine(500, 100, 700, 300, paint);
 
             // Save the bitmap to a file
             using (var image = SKImage.FromBitmap(bitmap))
             using (var data = image.Encode(SKEncodedImageFormat.Png, 100))
 
             using (var memoryStream = new MemoryStream())
             {
                 data.SaveTo(memoryStream);
                 byte[] imageBytes = memoryStream.ToArray();
                 base64String = Convert.ToBase64String(imageBytes);
                 Console.WriteLine(base64String);
 
                 // Print or return the base64 string
             }
         }
     }
     return base64String;
}
// some C# code here

You can also share some XAML:

<!-- xaml code here -->

Expected Behavior

The program should run without any exceptions in AWS Lambda .NET8

Actual Behavior

Get an exception is .NET version 8 Working fine in .NET version 6

System.DllNotFoundException: Unable to load shared library 'libSkiaSharp' or one of its dependencies. In order to help diagnose loading problems, consider using a tool like Strace. If you're using glibc, consider setting the LD_DEBUG environment variable.

Version of SkiaSharp

Other (Please indicate in the description)

Last Known Good Version of SkiaSharp

2.88.2 (Previous)

IDE / Editor

Visual Studio (Windows)

Platform / Operating System

Windows

Platform / Operating System Version

Windows 11

Devices

Asus 12th Gen Intel(R) Core(TM) i5-1235U 1.30 GHz

Relevant Screenshots

No response

Relevant Log Output

No response

Code of Conduct

• [x] I agree to follow this project's Code of Conduct

[2mik]

Got the same issue on Debian GNU/Linux 12 (bookworm), .NET8, and SkiaSharp 2.88.6.

[2mik]

In my case sudo apt install libfontconfig1 solved the issue. But the error message (in the page title) is not clear for that purpose. See this thread.

[iharmaiseyeu]

I have the same issue after moving Linux Azure Functions to .NET 8. Everything works perfectly fine on .NET 6.

Because it is Azure Function I cannot use sudo apt install libfontconfig1 to install additional dependencies.

The following packages were installed:

<PackageReference Include="SkiaSharp" Version="2.88.8" />
<PackageReference Include="SkiaSharp.NativeAssets.Linux.NoDependencies" Version="2.88.8" />

There is the solution in the thread #1341 but it looks mostly like a workaround, not like a real fix.

[Soundman32]

Same issue on AWS Lambda with .NET8. Haven't tried .NET6.

[mattleibow]

I am testing here with AWS and it works for me: https://github.com/mattleibow/SkiaSharpAwsLambda

I am using the SkiaSharp.NativeAssets.Linux.NoDependencies package to avoid having to install OS dependencies. If you don't want this one, then you will have to use the docker containers.

I have included both examples in the repo.

[dotnet-policy-service[bot]]

Hi @pandi123. We have added the status/needs-info label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[dotnet-policy-service[bot]]

This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment. If it is closed, feel free to comment when you are able to provide the additional information and we will re-investigate.