#include <u.h>#include <libc.h>#include <libg.h> voidsegment(Bitmap *d, Point p1, Point p2, int v, Fcode f){	uchar *buf; 	buf = bneed(22);	buf[0] = 'l';	BPSHORT(buf+1, d->id);	BPLONG(buf+3, p1.x);	BPLONG(buf+7, p1.y);	BPLONG(buf+11, p2.x);	BPLONG(buf+15, p2.y);	buf[19] = v;	BPSHORT(buf+20, f);}