- if ypos + 4 >= dparams.height {
- let str_l = left_str[dblkpos + dparams.dblkstride];
- let str_r = left_str[dblkpos + dparams.dblkstride * 2];
- if (str_l | str_r) != 0 {
+ if ypos + 8 >= dparams.height {
+ let str_l = left_str[dblkpos + dparams.dblkstride - 1];
+ let str_r = left_str[dblkpos + dparams.dblkstride];
+ if ((str_l | str_r) & 3) != 0 {