The cpdf_lineto() function draws a line from the current point to the point with coordinates (x_coor, y_coor). 成功回傳TRUE失敗回傳FALSE。
The optional parameter mode determines the unit length. If it is 0 or omitted the default unit as specified for the page is used. Otherwise the coordinates are measured in postscript points disregarding the current unit.
See also cpdf_moveto(), cpdf_rmoveto() and cpdf_curveto().