butt_cap
m_line_cap(butt_cap),
stroke->line_cap(agg::butt_cap);
case agg::butt_cap:
if (stroke->line_cap() != agg::butt_cap) {
property->AddOption(agg::butt_cap, "Butt");
return agg::butt_cap;
return agg::butt_cap;