[BUG] .Net Framework 4.7.2 ClickOnce package - Unable to load library 'libSkiaSharp'

[ajohnstone-ks]

Description

SkiaSharp Nuget version: 3.119.1

We're adding SkiaSharp to our .net winforms app (framework 4.7.2) for the first time, and we have a problem where the ClickOnce version of the app throws the following exception.

System.TypeInitializationException: The type initializer for 'SkiaSharp.SKData' threw an exception. ---> System.DllNotFoundException: Unable to load library 'libSkiaSharp'.
   at SkiaSharp.LibraryLoader.LoadLocalLibrary[T](String libraryName)
   at System.Lazy`1.CreateValue()
   at System.Lazy`1.LazyInitValue()
   at SkiaSharp.SkiaApi.sk_data_new_empty()
   at SkiaSharp.SKData..cctor()
   --- End of inner exception stack trace ---
   at SkiaSharp.SKData.Create(IntPtr address, Int32 length)
   at SkiaSharp.SKBitmap.Decode(ReadOnlySpan`1 buffer)
   at SkiaSharp.SKBitmap.Decode(Byte[] buffer)

Our MSIX version of the app does not however, and I think its because libSkiaSharp.dylib is not being included in the ClickOnce publish, even though I have it configured to (the Application Files dialog says its not referenced). That file IS included in the MSIX package however.

Code

var image = SKBitmap.Decode(imageData ?? throw new ArgumentNullException(nameof(imageData)))

In a WinForms app, then published with ClickOnce.

Expected Behavior

I expect the image to be decoded.

Actual Behavior

An exception: System.DllNotFoundException: Unable to load library 'libSkiaSharp'

Version of SkiaSharp

3.116.0 (Current)

Last Known Good Version of SkiaSharp

Other (Please indicate in the description)

IDE / Editor

Visual Studio (Windows)

Platform / Operating System

Windows

Platform / Operating System Version

• Windows 11
• Windows 10

Devices

• Dell workstations

Relevant Screenshots

No response

Relevant Log Output

Code of Conduct

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

[github-actions]

Triage Summary

Labels will be applied for the affected library (libSkiaSharp), the operating system (Windows Classic), and the issue's nature (reliability).

This issue does not appear to be a regression, but it does involve a critical reliability problem due to a crash.

Additional remarks:

• No suitable labels were found for an issue specifically involving SkiaSharp in a .NET WinForms context, as it does not fit into any standard backend categories like OpenGL or Metal.

Detailed Summary and Actions

Summary of the triage:

• The issue pertains specifically to a library loading problem with 'libSkiaSharp', categorized under native libraries for SkiaSharp.
• It affects applications built with .NET WinForms running on Windows using Win32 APIs, particularly in the context of ClickOnce deployment.
• The issue is related to reliability, as it experiences a crash due to the inability to load the required library.

Summary of the actions that will be performed:

Action	Item	Description
Apply Label	area/libSkiaSharp.native	The issue relates to a specific library loading problem with 'libSkiaSharp', a native library.
Apply Label	os/Windows-Classic	The issue relates to a WinForms application running on Windows using Win32 APIs.
Apply Label	tenet/reliability	The issue describes a crash related to the inability to load a required library.

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