shithub: oledsaver

ref: 9d8d932b97da40af6d4c21208f0e51ccccf093c4
dir: /bitart.h/

int
ob0(int x, int y);

int
ob1(int x, int y);

int
ob2(int x, int y);

int
ob3(int x, int y);

int
ob4(int x, int y);

int
ob5(int x, int y);

int
drand(int, int);