f_slop           1735 ext/gd/libgd/gd_interpolation.c 	const gdFixed f_slop = f_slop_x > 0 && f_slop_x > 0 ?
f_slop           1766 ext/gd/libgd/gd_interpolation.c 				c = c | (( gdTrueColorGetAlpha(c) + ((int)(127* gd_fxtof(f_slop)))) << 24);