KM_P2 496 ext/gd/libgd/gd_interpolation.c return(KM_P0+x*x*(KM_P2-x*KM_P3)); KM_P2 498 ext/gd/libgd/gd_interpolation.c return(KM_P0+x*x*(KM_P2+x*KM_P3));