PNG_PASS_ROWS    9897 contrib/libtests/pngvalid.c          m = PNG_PASS_ROWS(v, pass);
PNG_PASS_ROWS    1499 contrib/tools/pngfix.c                      PNG_PASS_ROWS(file->height, pass));
PNG_PASS_ROWS     229 pngwutil.c                    cb_base += (PNG_ROWBYTES(pd, pw)+1) * PNG_PASS_ROWS(h, pass);