var mka11 = function(padder){
	var buffer = [];
	return function(data){
		return buffer = buffer.concat(padder(data));
	}
}

Draw9p.readdrawctl = function(fid, offset){
	cons.log("readdrawctl");
	var dd = this.drawdir(fid.qid.path);

	var conn = this.conns[dd.drawdir];
	if(conn == undefined){
		throw("invalid draw connection");
	}
	var img = conn.imgs[conn.imgid];
	if(img == undefined){
		throw("invalid image");
	}

	if(offset == 0){
		var a11 = mka11(pad11);
		a11(conn.id);
		a11(conn.imgid);
		a11(img.chan);
		a11(0); /* what is this? */
		a11(img.r.min.x);
		a11(img.r.min.y);
		a11(img.r.max.x);
		a11(img.r.max.y);
		a11(img.clipr.min.x);
		a11(img.clipr.min.y);
		a11(img.clipr.max.x);
		return(a11(img.clipr.max.y));
	}else{
		return [];
	}
}

Draw9p.writedrawctl = function(connid, offset, data){
	cons.log("writedrawctl");
	var conn = this.conns[connid];
	if(conn == undefined){
		throw("invalid draw connection");
	}

	conn.imgid = (new ArrayIterator(data)).getLong();
}