sdlGetDirect3D9AdapterIndex function system
Get the D3D9 adapter index that matches the specified display.
The returned adapter index can be passed to IDirect3D9::CreateDevice and
controls on which monitor a full screen application will appear.
\param displayID the instance of the display to query. \returns the D3D9 adapter index on success or -1 on failure; call SDL_GetError() for more information.
\since This function is available since SDL 3.2.0.
extern SDL_DECLSPEC int SDLCALL SDL_GetDirect3D9AdapterIndex(SDL_DisplayID displayID)
Implementation
int sdlGetDirect3D9AdapterIndex(int displayId) {
  final sdlGetDirect3D9AdapterIndexLookupFunction = _libSdl
      .lookupFunction<
        Int32 Function(Uint32 displayId),
        int Function(int displayId)
      >('SDL_GetDirect3D9AdapterIndex');
  return sdlGetDirect3D9AdapterIndexLookupFunction(displayId);
}