PolyPolygon.java

// Copyright 2002, FreeHEP.
package org.freehep.graphicsio.emf.gdi;

import java.awt.Point;
import java.awt.Rectangle;
import java.io.IOException;

import org.freehep.graphicsio.emf.EMFInputStream;
import org.freehep.graphicsio.emf.EMFOutputStream;
import org.freehep.graphicsio.emf.EMFTag;

/**
 * PolyPolygon TAG.
 * 
 * @author Mark Donszelmann
 * @version $Id: PolyPolygon.java,v 1.4 2009-08-17 21:44:44 murkle Exp $
 */
public class PolyPolygon extends EMFTag {

	private Rectangle bounds;

	private int start, end;

	private int[] numberOfPoints;

	private Point[][] points;

	public PolyPolygon() {
		super(8, 1);
	}

	public PolyPolygon(Rectangle bounds, int start, int end,
			int[] numberOfPoints, Point[][] points) {
		this();
		this.bounds = bounds;
		this.start = start;
		this.end = end;
		this.numberOfPoints = numberOfPoints;
		this.points = points;
	}

	@Override
	public EMFTag read(int tagID, EMFInputStream emf, int len)
			throws IOException {

		Rectangle bounds = emf.readRECTL();
		int np = emf.readDWORD();
		/* int totalNumberOfPoints = */ emf.readDWORD();
		int[] pc = new int[np];
		Point[][] points = new Point[np][];
		for (int i = 0; i < np; i++) {
			pc[i] = emf.readDWORD();
			points[i] = new Point[pc[i]];
		}
		for (int i = 0; i < np; i++) {
			points[i] = emf.readPOINTL(pc[i]);
		}
		PolyPolygon tag = new PolyPolygon(bounds, 0, np - 1, pc, points);
		return tag;
	}

	@Override
	public void write(int tagID, EMFOutputStream emf) throws IOException {
		emf.writeRECTL(bounds);
		emf.writeDWORD(end - start + 1);
		int c = 0;
		for (int i = start; i < end + 1; i++) {
			c += numberOfPoints[i];
		}
		emf.writeDWORD(c);
		for (int i = start; i < end + 1; i++) {
			emf.writeDWORD(numberOfPoints[i]);
		}
		for (int i = start; i < end + 1; i++) {
			emf.writePOINTL(numberOfPoints[i], points[i]);
		}
	}

	@Override
	public String toString() {
		return super.toString() + "\n" + "  bounds: " + bounds + "\n"
				+ "  #polys: " + (end - start + 1);
	}
}