sdlTanf function
extern DECLSPEC float SDLCALL SDL_tanf(float x)
Implementation
double sdlTanf(double x) {
  final sdlTanfLookupFunction = libSdl2.lookupFunction<Float Function(Float x),
      double Function(double x)>('SDL_tanf');
  return sdlTanfLookupFunction(x);
}