cpdf_setlinecap
    (PHP 3>= 3.0.8, PHP 4 )
cpdf_setlinecap -- Sets linecap parameter
Description
void 
cpdf_setlinecap ( int pdf document, int value)
     The cpdf_setlinecap() function set the linecap
     parameter between a value of 0 and 2. 0 = butt end, 1 = round,
     2 = projecting square.