uc q0, uc q1, uc q2, uc q3)
{
signed char mask = 0;
- mask |= (abs(p3 - p2) > limit) * -1;
- mask |= (abs(p2 - p1) > limit) * -1;
- mask |= (abs(p1 - p0) > limit) * -1;
- mask |= (abs(q1 - q0) > limit) * -1;
- mask |= (abs(q2 - q1) > limit) * -1;
- mask |= (abs(q3 - q2) > limit) * -1;
- mask |= (abs(p0 - q0) * 2 + abs(p1 - q1) / 2 > blimit) * -1;
- mask = ~mask;
- return mask;
+ mask |= (abs(p3 - p2) > limit);
+ mask |= (abs(p2 - p1) > limit);
+ mask |= (abs(p1 - p0) > limit);
+ mask |= (abs(q1 - q0) > limit);
+ mask |= (abs(q2 - q1) > limit);
+ mask |= (abs(q3 - q2) > limit);
+ mask |= (abs(p0 - q0) * 2 + abs(p1 - q1) / 2 > blimit);
+ return mask - 1;
}
/* is there high variance internal edge ( 11111111 yes, 00000000 no) */