Subversion Repositories mkgmap

/*
 * Copyright (C) 2011.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 or
 * 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.
 */
package uk.me.parabola.mkgmap.typ;

import uk.me.parabola.imgfmt.app.typ.TypData;
import uk.me.parabola.mkgmap.scan.SyntaxException;
import uk.me.parabola.mkgmap.scan.TokenScanner;

/**
 * Process lines from the draw order section of the typ.txt file.
 *
 * @author Steve Ratcliffe
 */
class DrawOrderSection implements ProcessSection {
        private final TypData data;

        DrawOrderSection(TypData data) {
                this.data = data;
        }

        /**
         * There is only one tag in this section.
         */
        public void processLine(TokenScanner scanner, String name, String value) {
                if (!name.equalsIgnoreCase("Type"))
                        throw new SyntaxException(scanner, "Unrecognised keyword in draw order section: " + name);

                String[] typeDrawOrder = value.split(",",-1);
                if (typeDrawOrder.length != 2)
                        throw new SyntaxException(scanner, "Unrecognised drawOrder type " + value);

                int fulltype;
                try {
                        fulltype = Integer.decode(typeDrawOrder[0]);
                } catch (NumberFormatException e) {
                        throw new SyntaxException(scanner, "Bad number " + typeDrawOrder[0]);
                }
                int type;
                int subtype = 0;

                if (fulltype >= 0x100) {
                        type = (fulltype >>> 8) & 0x3fff;
                        subtype = fulltype & 0xff;
                } else {
                        type = fulltype & 0xff;
                }

                try {
                        int level = Integer.parseInt(typeDrawOrder[1]);
                        data.addPolygonStackOrder(level, type, subtype);
                } catch (NumberFormatException e) {
                        throw new SyntaxException(scanner, "Bad number '" + typeDrawOrder[1] + "'");
                }
        }

        /**
         * Nothing to do, each line stands by itself.
         */
        public void finish(TokenScanner scanner) {
        }
}