Experimental Patcher to run HITMAN3 on Apple's Game Porting Toolkit

Good news! Apple has swiftly fixed what was preventing the game to launch, and as a result, HITMAN3 now launches seamlessly without requiring any additional patches.

The missing function was DXGIAdapter::RegisterVideoMemoryBudgetChangeNotificationEvent, and on launch, the game was checking for its return value.

In the previous versions of D3DMetal, the function was implemented like this:

int64_t DXGIAdapter::RegisterVideoMemoryBudgetChangeNotificationEvent(...) {
    return DXGI_ERROR_UNSUPPORTED;
}

But from the beta3, the same function is now:

int64_t DXGIAdapter::RegisterVideoMemoryBudgetChangeNotificationEvent(
  int64_t, int64_t, int64_t, int64_t, int32_t* arg5
) {
    *arg5 = 1;
    return S_OK;
}

This means that whilst the functionality is not implemented (it's probably not going to be an issue with any game), games that rely on that function to succeed now will no longer refuse to run.

1. Install Rust curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
2. Compile cargo build --release

./target/release/h3_patcher <HITMAN3_PATH>

(where <HITMAN3_PATH> is the main install directory, containing the Launcher.exe binary)