[skia] Issue with SKXamlCanvas - Process Crashes when Exceptions are Thrown in PaintSurface Event Triggered by Background Thread

[lindexi]

Current behavior

I am writing to report an issue I am experiencing with the use of SKXamlCanvas. The problem arises when any exception is thrown within the PaintSurface event, particularly when this event is triggered by a background thread. This situation leads to a crash of my process.

Expected behavior

The expected behavior is that the application should continue to function normally and be able to collect the exception, even if any exception is thrown in the PaintSurface event. Ideally, this could be achieved through the TaskScheduler.UnobservedTaskException event.

How to reproduce it (as minimally and precisely as possible)

To reproduce this issue, please follow the steps below:

1. Add SKXamlCanvas to xaml.
2. Subscribe to the PaintSurface event of SKXamlCanvas and throw an exception in the event implementation method.
3. Call the Invalidate method of SKXamlCanvas from a background thread.

You can find my demo in https://github.com/lindexi/lindexi_gd/tree/dde76effc23ebb9ee974b6ec276b242c39a50bdf/JagobawearjiNeewhiqakerki

Workaround

No response

Works on UWP/WinUI

None

Environment

No response

NuGet package version(s)

No response

Affected platforms

No response

IDE

No response

IDE version

No response

Relevant plugins

No response

Anything else we need to know?

I fixed the issues in mono/SkiaSharp#2720

Reference: #15097

Reference: dotnet/runtime#76367

[jeromelaban]

Background thread manipulations of the SKXamlCanvas are not supported at this time.

[lindexi]

Thank you @jeromelaban . Fix by mono/SkiaSharp#2720

[jeromelaban]

Thanks for the fix!!