const float prep_y(powf(color.get_y(),2.2f)*color.get_a());
const float prep_u(color.get_u());
const float prep_v(color.get_v());
const float prep_y(powf(color.get_y(),2.2f)*color.get_a());
const float prep_u(color.get_u());
const float prep_v(color.get_v());