Function key_altpressed

src/inputdevice.cpp:6347–6350

	return (input_getqualifiers() & ID_FLAG_QUALIFIER_SHIFT) != 0;
}
bool key_altpressed(void)
{
	return (input_getqualifiers() & ID_FLAG_QUALIFIER_ALT) != 0;
}
bool key_ctrlpressed(void)
{
	return (input_getqualifiers() & ID_FLAG_QUALIFIER_CONTROL) != 0;