ABS              1003 contrib/gregbook/rpng2-win.c                 gray = (double)MAX(ABS(y), ABS(x)) / grayspot;
ABS              1010 contrib/gregbook/rpng2-win.c                 s = gray * ((double)(ABS(x)+ABS(y)) / (double)(hw + hh));
ABS              1253 contrib/gregbook/rpng2-x.c                 gray = (double)MAX(ABS(y), ABS(x)) / grayspot;
ABS              1260 contrib/gregbook/rpng2-x.c                 s = gray * ((double)(ABS(x)+ABS(y)) / (double)(hw + hh));
ABS              2021 contrib/gregbook/rpng2-x.c                 gray = (double)MAX(ABS(y), ABS(x)) / grayspot;
ABS              2028 contrib/gregbook/rpng2-x.c                 s = gray * ((double)(ABS(x)+ABS(y)) / (double)(hw + hh));