C#•2mo ago

Install SkiaSharp

I'm completely new to C#. I'm trying to install a package but can't figure out how. What is going wrong?

$ nuget install SkiaSharp
Feeds used:

Installing package 'SkiaSharp' to '/home/vexcess/Downloads/cstest'.
Unable to find package 'SkiaSharp'

$ nuget install SkiaSharp
Feeds used:

Installing package 'SkiaSharp' to '/home/vexcess/Downloads/cstest'.
Unable to find package 'SkiaSharp'

16 Replies

VExcess•2mo ago

I'm on Linux if that has to do with anything

jcotton42•2mo ago

you'll want to use dotnet add package <ID>, there's rarely need for the nuget cli these days.

VExcess•2mo ago

I was just following what the repo said https://github.com/mono/SkiaSharp/tree/main?tab=readme-ov-file#using-skiasharp

jcotton42•2mo ago

not sure why they'd tell you to do that, must've been written a while ago

VExcess•2mo ago

the readme was last updated 5 months ago ¯\_(ツ)_/¯

jcotton42•2mo ago

though, i also noticed feeds used is blank, that's odd try dotnet add, does it work?

VExcess•2mo ago

well it seemed to install SkiaSharp, but now when I run my app it can't locate the library

vexcess@vexcess-IdeaPad-5-Pro-16ACH6:~/Downloads/cstest$ dotnet run
Hello World!
Unhandled exception. System.TypeInitializationException: The type initializer for 'SkiaSharp.SKImageInfo' threw an exception.
 ---> 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: 
/usr/lib/dotnet/shared/Microsoft.NETCore.App/8.0.8/libSkiaSharp.so: cannot open shared object file: No such file or directory
/home/vexcess/Downloads/cstest/bin/Debug/net8.0/libSkiaSharp.so: cannot open shared object file: No such file or directory
/usr/lib/dotnet/shared/Microsoft.NETCore.App/8.0.8/liblibSkiaSharp.so: cannot open shared object file: No such file or directory
/home/vexcess/Downloads/cstest/bin/Debug/net8.0/liblibSkiaSharp.so: cannot open shared object file: No such file or directory
/usr/lib/dotnet/shared/Microsoft.NETCore.App/8.0.8/libSkiaSharp: cannot open shared object file: No such file or directory
/home/vexcess/Downloads/cstest/bin/Debug/net8.0/libSkiaSharp: cannot open shared object file: No such file or directory
/usr/lib/dotnet/shared/Microsoft.NETCore.App/8.0.8/liblibSkiaSharp: cannot open shared object file: No such file or directory
/home/vexcess/Downloads/cstest/bin/Debug/net8.0/liblibSkiaSharp: cannot open shared object file: No such file or directory

   at SkiaSharp.SkiaApi.sk_colortype_get_default_8888()
   at SkiaSharp.SKImageInfo..cctor()
   --- End of inner exception stack trace ---
   at SkiaSharp.SKImageInfo..ctor(Int32 width, Int32 height, SKColorType colorType, SKAlphaType alphaType)
   at MyApp.Main() in /home/vexcess/Downloads/cstest/Program.cs:line 9

vexcess@vexcess-IdeaPad-5-Pro-16ACH6:~/Downloads/cstest$ dotnet run
Hello World!
Unhandled exception. System.TypeInitializationException: The type initializer for 'SkiaSharp.SKImageInfo' threw an exception.
 ---> 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: 
/usr/lib/dotnet/shared/Microsoft.NETCore.App/8.0.8/libSkiaSharp.so: cannot open shared object file: No such file or directory
/home/vexcess/Downloads/cstest/bin/Debug/net8.0/libSkiaSharp.so: cannot open shared object file: No such file or directory
/usr/lib/dotnet/shared/Microsoft.NETCore.App/8.0.8/liblibSkiaSharp.so: cannot open shared object file: No such file or directory
/home/vexcess/Downloads/cstest/bin/Debug/net8.0/liblibSkiaSharp.so: cannot open shared object file: No such file or directory
/usr/lib/dotnet/shared/Microsoft.NETCore.App/8.0.8/libSkiaSharp: cannot open shared object file: No such file or directory
/home/vexcess/Downloads/cstest/bin/Debug/net8.0/libSkiaSharp: cannot open shared object file: No such file or directory
/usr/lib/dotnet/shared/Microsoft.NETCore.App/8.0.8/liblibSkiaSharp: cannot open shared object file: No such file or directory
/home/vexcess/Downloads/cstest/bin/Debug/net8.0/liblibSkiaSharp: cannot open shared object file: No such file or directory

   at SkiaSharp.SkiaApi.sk_colortype_get_default_8888()
   at SkiaSharp.SKImageInfo..cctor()
   --- End of inner exception stack trace ---
   at SkiaSharp.SKImageInfo..ctor(Int32 width, Int32 height, SKColorType colorType, SKAlphaType alphaType)
   at MyApp.Main() in /home/vexcess/Downloads/cstest/Program.cs:line 9

this is my code

using System;
using SkiaSharp;

public class MyApp {
 
    static public void Main() {
        Console.WriteLine("Hello World!");
        
        var imageInfo = new SKImageInfo(
            width: 400,
            height: 400,
            colorType: SKColorType.Rgba8888,
            alphaType: SKAlphaType.Premul);
            
        var surface = SKSurface.Create(imageInfo);

        var canvas = surface.Canvas;

    }
}

using System;
using SkiaSharp;

public class MyApp {
 
    static public void Main() {
        Console.WriteLine("Hello World!");
        
        var imageInfo = new SKImageInfo(
            width: 400,
            height: 400,
            colorType: SKColorType.Rgba8888,
            alphaType: SKAlphaType.Premul);
            
        var surface = SKSurface.Create(imageInfo);

        var canvas = surface.Canvas;

    }
}

jcotton42•2mo ago

you're missing a native dep, it would seem from the readme, it seems you need another nuget to get the native lib

VExcess•2mo ago

I installed the native dep too, but I can't get it working. I'm giving up on C# and going back to Rust

canton7•2mo ago

What error did you get after installing the native dep?

VExcess•2mo ago

Maybe the issue is SkiaSharp and not dotnet. I'm gonna try using CairoSharp instead Actually CairoSharp hasn't been updated in 4 years so it's probaby not worth trying to use wait no, it's GTKsharp?

Licht•2mo ago

@VExcess why don't you use ImageSharp? It's pure C# so it just works anywhere C# works. It's my go to for image manipulation.

Licht•2mo ago

https://github.com/SixLabors/ImageSharp

GitHub

GitHub - SixLabors/ImageSharp: :camera: A modern, cross-platform, 2...

:camera: A modern, cross-platform, 2D Graphics library for .NET - SixLabors/ImageSharp

canton7•2mo ago

Do be aware that the license isn't necessarily compatible with a commercial product

VExcess•2mo ago

only being able to use the library if your company makes less than $1M per year is unique Not an issue for me though. All the code I've ever written is open source and free to use

Licht•2mo ago

Then you're about to have a good time.

Gaming

Programming

Install SkiaSharp