Subversion Repositories mkgmap

/*
 * Copyright (C) 2007 Steve Ratcliffe
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *
 * Author: Steve Ratcliffe
 * Create date: Dec 15, 2007
 */
package uk.me.parabola.imgfmt.app.typ;

import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;

import uk.me.parabola.imgfmt.app.ImgFileWriter;

/**
 * Holds the shape stacking section.
 *
 * Deals with sorting everything correctly, so no need to sort in the input file.
 *
 * @author Steve Ratcliffe
 */
public class ShapeStacking {
        private final SortedMap<Integer, DrawOrder> bar = new TreeMap<Integer, DrawOrder>();

        public void addPolygon(int level, int type, int subtype) {
                int levelType = (level << 16) + type;
                DrawOrder order = bar.get(levelType);
                if (order == null) {
                        order = new DrawOrder(type);
                        bar.put(levelType, order);
                }
               
                order.addSubtype(subtype);
        }

        public void write(ImgFileWriter writer) {
                int lastLevel = 1;

                DrawOrder empty = new DrawOrder(0);

                for (Map.Entry<Integer, DrawOrder> ent : bar.entrySet()) {
                        int level = (ent.getKey() >> 16) & 0xffff;
                        DrawOrder order = ent.getValue();

                        if (level != lastLevel) {
                                empty.write(writer);
                                lastLevel = level;
                        }

                        order.write(writer);
                }
        }

}