SkiaSharp: [BUG] [WASM] HarfBuzzSharp Linker Errors

Description I’m using SkiaSharp + HarfBuzzSharp in a WebAssembly application. I have disabled the linker to reduce the build time for the project which leads to various issues listed below. With the linker enabled the build works fine but takes significantly longer.

This is the setup i’m using:

• .net5.0
• linker enabled
• HarfBuzzSharp Version 2.88.0-preview.7
• SkiaSharp Version 2.88.0-preview.7
• HarfBuzzSharp.NativeAssets.WebAssembly Version 2.6.1.8-preview.93

i’m inspecting the build logs with detailed verbosity and get the following output with System.Exception: Failed to generate AOT layout Behavior

... linker-out > pinvoke-table.h.tmp (TaskId:779)
[00:01:57.7838172] Unhandled exception. System.Exception: Parameter types of pinvoke callback method 'System.IntPtr GetTableDelegateProxyImplementation(System.IntPtr, HarfBuzzSharp.Tag, System.IntPtr)' needs to be blittable. (TaskId:779)                 
[00:01:57.7839076]    at PInvokeTableGenerator.Error(String msg) in D:\a\1\s\src\Uno.Wasm.Tuner\PInvokeTableGenerator.net5.cs:line 328 (TaskId:779)


Unhandled exception. System.Exception: The return type 'HarfBuzzSharp.UnicodeCombiningClass' of pinvoke callback method 'HarfBuzzSharp.UnicodeCombiningClass CombiningClassProxyImplementation(System.IntPtr, System.UInt32, System.Void*)' needs to be blittable.

Basic Information

• Version with issue: 2.88.0-preview.7
• Last known good version: x
• IDE: Visual Studio 2019
• Platform Target Frameworks:
  • Uno WebAssembly Bootstrapper : 3.0.0-dev.95
• Target Devices:
  • Browser

Reproduction Link

https://github.com/nor0x/skiasharp-1720