I care about MIDIs! I’ll check this out asap.

Pretty cool, I’m interested to see how far you can take it!

If you can match BASSMIDI in terms of features then you got yourself a serious synth on hands. (If you can match Sound Canvas or Yamaha MU synths, even better!)

Just keep in mind that most (and by that I mean like 99%) of soundfonts aren’t exactly made to proper specifications. A lot of them miss certain parameters (such as filter cutoff frequency, LFO frequencies, etc) and even misuse them (reverb and chorus pre-set on layers being cranked up).

The only soundfonts I recommend you develop this with (as your target) are the ones made by E-MU themselves. CT4MGM.SF2 especially. They basically cloned the Roland SC-55 as closely as they could on their sound chips at the time and most sounds match the behaviors correctly.

The way I did it is by trying to solve more and more advanced problems with simpler tools/features, then looking at more advanced features and seeing where they could be applied to make the problem solving simpler. Rinse and repeat.

An easy example that I can remember is making arrays that dynamically expand. I started with the barebones malloc and worked out how to use std::vector (and other list types) in its place.

Understanding that concept is, what I believe, to be the foundation of learning programming.

I’m no pro whatsoever, but using this method really helps me pick up and learn new languages.

Oh you mean Android Studio automagically “updating” your versions so that your build breaks and you spent 3 hours figuring out what just happened without you even touching anything?

Oh cool, I didn’t know!

I’ll go check it out, thanks!

I want to try to use Rust myself as well to build a library and I wonder how it’ll turn out (especially since I do Win32 hacks mostly lol).

No problem. Please do report back!

We really do not have many (if any) Rust alternatives for code hooking and injection and doing stuff with rendering like we do with C++.

Maybe you could finally figure something out we can use for other games as well!

I’ll preface this by saying that I’m not familiar with Rust nor Hearthstone at all, but I do deal with D3D9 and D3D11 on Windows to do similar things. Hopefully this will give you insights how you could approach this. (Closest I’ve done was code injection on Android)

The most common and robust approach to this is to hook/detour the API functions that the game imports from the renderer backend.

One way you usually do this is by creating a dummy library which overrides/intercepts the system library and passes through every function call to the API, except for the ones you need, you’d put your code before/after the passthrough. This usually requires you to gather all exported symbols and re-create them, which is a very tedious but rewarding task, as it usually is very stable and can work around things such as DRM.

Usually, since that sits quite low on the application’s code stack, it is most efficient for it to be a more general-purpose hook which can load other libraries. Examples would be things like the ASI loader or Reshade on Windows.

Another way would be to do code injection via library side-loading. Essentially, you can simply load a library that performs the code hooks and does necessary renderer API hooking. This is usually done in combination with the previous method (it being a “plugin” loader), however, it is also possible to modify game binaries to call dlopen to load your library and its exported function as an entrypoint (in which case you need to do platform’s CPU assembly code for a bit).

Those are the entrypoints for your code. After that, it is all about necessary render backend code that you need to do in order to draw graphics/text/etc.

In C/C++ land I’d just tell you to use Dear ImGui, but seeing as that doesn’t exist for Rust, you’re kinda on your own.

Same with the API detouring. Ideally, you’d make a plugin loader that does the job for you. Not sure if that exists in Rust yet.

For references, Vulkan overlays such as MangoHUD or ReShade could be useful to help you figure out how to draw stuff on screen.

As for the rest of your code - it can run in a separate thread that does the job for you as the game runs. Or, make a client-server relationship and make the game hook be the server for your info that you need.

C++ is at least backwards compatible (for 99% of code anyway, yes I know about some features being removed, but that’s an exception and not the rule).

AAAAAAAAAAAAAAAAAAAAAAAA

They kinda don’t have the sources there. That’s a decompilation by IDA in that image.

But nevertheless they could run it if they set up an arm64 machine, technically.