316             double wy = bicubic[abs(dy)][0];  in alpha_calc()  local
318             if (wy != 0)  in alpha_calc()
331                alpha += wy * alphay;  in alpha_calc()
388    double wy = fabs(arg->y1-arg->y2)/2;  in square_check_line()  local
390    if (square_check(x, y, cx-wx-w, cy-wy-w, cx+wx+w, cy+wy+w))  in square_check_line()
396       wy -= w;  in square_check_line()
397       if (wx > 0 && wy > 0 && square_check(x, y, cx-wx, cy-wy, cx+wx, cy+wy))  in square_check_line()
497    double wy = fabs(arg->y1-arg->y2)/2;  in circle_check_line()  local
499    if (circle_check(x, y, cx-wx-w, cy-wy-w, cx+wx+w, cy+wy+w))  in circle_check_line()
505       wy -= w;  in circle_check_line()
506       if (wx > 0 && wy > 0 && circle_check(x, y, cx-wx, cy-wy, cx+wx, cy+wy))  in circle_check_line()