loads patch whose filename is \$1 and turns it into a sequence of hpgl codes using [hpgl_objectbox], [hpgl_messagebox], etc. hpgl codes not using LB/print/print_from_ascii hpgl codes including print_from_ascii hpgl codes without print_from_ascii, from the font renderer (usually [hpgl_font_render]) scaling value to give to [hpgl_objectbox] and [hpgl_messagebox] scaling value between pd patch coordinates and hpgl coordinates may take several seconds to run this bang