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.imgfmt.app.typ;

import java.nio.charset.CharsetEncoder;

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

/**
 * A line as read from a typ.txt file.
 *
 * @author Steve Ratcliffe
 */
public class TypLine extends TypElement {
        private static final int F_LABEL = 0x1;
        private static final int F_USE_ROTATION = 0x2;
        private static final int F_EXTENDED = 0x4;

        private boolean useOrientation;
        private byte lineWidth;
        private byte borderWidth;

        /**
         * This is slightly different to the polygon case, but not much.
         *
         * The line width is held in the first byte along with the type.
         * The colour scheme does not have a bit to say if a bitmap is used,
         * as you can always have one.
         *
         * There is a border width that can be specified.
         *
         * @param encoder For the labels.
         */
        public void write(ImgFileWriter writer, CharsetEncoder encoder) {
                offset = writer.position();

                byte flags = 0;

                if (!labels.isEmpty())
                        flags |= F_LABEL;
                if (fontStyle != 0 || dayFontColour != null)
                        flags |= F_EXTENDED;
                if (!useOrientation)
                        flags |= F_USE_ROTATION;

                int height = 0;
                if (xpm.hasImage())
                        height = xpm.getColourInfo().getHeight();

                ColourInfo colourInfo = xpm.getColourInfo();
                int scheme = colourInfo.getColourScheme() & 0x7;

                writer.put((byte) ((scheme & 0x7) | (height << 3)));
                writer.put(flags);

                colourInfo.write(writer);
                if (xpm.hasImage())
                        xpm.writeImage(writer);

                if (height == 0) {
                        writer.put(lineWidth);
                        if ((scheme&~1) != 6)
                                writer.put((byte) (lineWidth + 2*borderWidth));
                }

                // The labels have a length byte to show the number of bytes following. There is
                // also a flag in the length. The strings have a language number proceeding them.
                // The strings themselves are null terminated.
                if ((flags & F_LABEL) != 0)
                        writeLabelBlock(writer, encoder);

                // The extension section hold font style and colour information for the labels.
                if ((flags & F_EXTENDED) != 0)
                        writeExtendedFontInfo(writer);

        }

        public void setUseOrientation(boolean useOrientation) {
                this.useOrientation = useOrientation;
        }

        public void setLineWidth(int val) {
                lineWidth = (byte) val;
        }

        public void setBorderWidth(int borderWidth) {
                this.borderWidth = (byte) borderWidth;
        }

        public void finish() {
                if (borderWidth != 0)
                        xpm.getColourInfo().setHasBorder(true);
        }
}