Dimension const dim = dimension(*pi.base.bv);
// draw outer frame
int const a = y - dim.asc + 1;
int const w = dim.wid - 2;
int const h = dim.height() - 2;
Dimension const dim = dimension(*pi.base.bv);
// draw outer frame
int const a = y - dim.asc + 1;
int const w = dim.wid - 2;
int const h = dim.height() - 2;