Function r_core::r_cons_canvas_line_back_edge

pub unsafe extern "C" fn r_cons_canvas_line_back_edge(
    c: *mut RConsCanvas, 
    x: c_int, 
    y: c_int, 
    x2: c_int, 
    y2: c_int, 
    style: *mut RCanvasLineStyle, 
    ybendpoint1: c_int, 
    xbendpoint: c_int, 
    ybendpoint2: c_int, 
    isvert: c_int
)