Official WASM support?

[ValorZard]

I recently released a project that got FNA working on wasm (albeit with SharedArrayBuffer):
https://github.com/ValorZard/fna-native-wasm-combo

The TL;DR is I have to build FNA twice, and link to two different versions of it depending if I want to build for WASM or not.

However, this is only necessary because FNA needs some (pretty minor) patches for this to work:
On the example project

• https://github.com/ValorZard/fna-native-wasm-combo/blob/master/FNAWasm.patch

And the patched WASM binaries from https://github.com/r58Playz/FNA-WASM-Build/tree/main

• https://github.com/r58Playz/FNA-WASM-Build/blob/main/FNA3D.patch

Extra comment from @r58Playz on discord

f you swap to the ST-* artifacts, remove wasmenablethreads, and disable wasmfs you can drop the requirement for sharedarraybuffer but that also means you don't get easy fs backends like fetchfs (fetch assets on demand from c#) and opfs (persistent storage that can be accessed from js easily) 

I wonder if this could be added to FNA itself as some sort of conditional implementation thing, and then we could test it by using CI/CD?

[ValorZard]

Looking at how bevy does it, I think this could totally work to test, see:
https://github.com/bevyengine/bevy/tree/main/.github/start-wasm-example
https://github.com/bevyengine/bevy/blob/main/.github/start-wasm-example/tests/wasm_example.spec.ts

My running script for wasm currently looks like this: https://github.com/ValorZard/fna-native-wasm-combo/blob/master/do_wasm.cs
I'm pretty sure I could port that into what .github wants

[r58Playz]

However, this is only necessary because FNA needs some (pretty minor) patches for this to work: On the example project

• https://github.com/ValorZard/fna-native-wasm-combo/blob/master/FNAWasm.patch
  And the patched WASM binaries from https://github.com/r58Playz/FNA-WASM-Build/tree/main
• https://github.com/r58Playz/FNA-WASM-Build/blob/main/SDL3-SDL2.patch
• https://github.com/r58Playz/FNA-WASM-Build/blob/main/FNA3D.patch

SDL3-SDL2.patch is only needed for sdl2-compat, FNA can use unpatched SDL3. FNA3D.patch is a hacky thing to just remove SDL GPU support since it was failing on WASM when I tried months ago, not sure if that's needed now. The main patch is the workaround for the mono bug in JIT/Interpreter only with pinvokes

[ValorZard]

I made a sample project that uses my patched binaries:
https://github.com/ValorZard/fna-wasm-test
You wanna take the WASM Multithreaded artifact from here: https://github.com/ValorZard/fnalibs-dailies/actions/runs/24975508316
And then create a folder called "statics" in FNAWasmRunner, and dump all the binaries in there.

Then, from the root of the project, you can run
dotnet run do_wasm.cs clean serve

[flibitijibibo]

fnalibs changes have been merged