base SDL_Keymod to assign (Put 0 for none)
whether the left shift key is pressed
whether the right shift key is pressed
whether the left ctrl key is pressed
whether the right ctrl key is pressed
whether the left alt key is pressed
whether the right alt key is pressed
whether the left GUI/"Windows" key is pressed
whether the right GUI/"Windows" key is pressed
whether num lock is toggled
whether caps lock is toggled
whether the AltGr keys are toggled
whether scroll lock is toggled
Constructs a dsdl2.Keymod by providing the flags