Wasm Implementation

[Dimkar3000]

Hello I spended about a week on trying to implement everything that is needed to the wasm target. I exported a lot of function and everything that can be exported and I know how to do, I have already done it. The Changes to your CmakeLists.txt where taken almost copy and paste from your private repo that had an implementation working, you probably whould take a look at that. issue reference

It seams that at somepoint I had the liberto.c file open and my auto formatting tool took a shot at it, I didn't touch in any other way and it doen't have any real changes.

Now If you know how you could implement exporting the save state and loading it beacause I didn't understand how. I also didn't care to implement a way to load and unload cheats.

My code is very straight forware as I wanted to finishing this fast because I won't have much time to go through and fix many things. 4 files is all of the implementation, plus the CmakeLists.txt changes.

I hope this will provide you with all you need to properly implement this feature. As a matter of fact I used this branch to implement a gui on my own. It lives here and you can try it. It is written is Svelte which I know maybe not be what you want but it proves that my port works.

[endrift]

Uh, I hate to break it to you but there's already an open issue for this (#1296) and a branch on my personal fork (https://github.com/endrift/mgba/tree/feature/wasm) that are relatively old at this point. The primary reason it hasn't been merged yet is the lack of a reasonable front end.

E] Actually, I see you were already aware of those and referred to them. As such, I'm not sure what this PR adds.

[Dimkar3000]

mostly function that one kan use to interact with the system from javascript. Look at pre.js Look at exports.c where I create them. For example: Every key has a getKey,setKey,press,releaseFunction, there are functions to mute, unmute, setVolume, as well as function to halt the game and continue .

I also implemented the forwaring a little bit differently to not get warnings from chrome.

As I said above, this is based on your work and I just added a bit more stuff and fixed some bugs.

[endrift]

I am not taking PRs to merge the wasm branch into master at this time. If you want to file a PR, file it against the wasm branch on my personal repo.