/*

   Copyright 2001,2003  The Apache Software Foundation 

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

 */
package org.apache.batik.svggen.font.table;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import org.apache.batik.svggen.font.*;

/**
 * @version $Id: GlyfTable.java,v 1.4 2004/08/18 07:15:21 vhardy Exp $
 * @author <a href="mailto:david@steadystate.co.uk">David Schweinsberg</a>
 */
public class GlyfTable implements Table {

    private byte[] buf = null;
    private GlyfDescript[] descript;

    protected GlyfTable(DirectoryEntry de, RandomAccessFileEmulator raf) throws IOException {
        raf.seek(de.getOffset());
        buf = new byte[de.getLength()];
        raf.read(buf);
/*
        TableMaxp t_maxp = (TableMaxp) td.getEntryByTag(maxp).getTable();
        TableLoca t_loca = (TableLoca) td.getEntryByTag(loca).getTable();
        descript = new TableGlyfDescript[t_maxp.getNumGlyphs()];
        for (int i = 0; i < t_maxp.getNumGlyphs(); i++) {
            raf.seek(tde.getOffset() + t_loca.getOffset(i));
            int len = t_loca.getOffset((short)(i + 1)) - t_loca.getOffset(i);
            if (len > 0) {
                short numberOfContours = raf.readShort();
                if (numberOfContours < 0) {
                    //          descript[i] = new TableGlyfCompositeDescript(this, raf);
                } else {
                    descript[i] = new TableGlyfSimpleDescript(this, numberOfContours, raf);
                }
            } else {
                descript[i] = null;
            }
        }

        for (int i = 0; i < t_maxp.getNumGlyphs(); i++) {
            raf.seek(tde.getOffset() + t_loca.getOffset(i));
            int len = t_loca.getOffset((short)(i + 1)) - t_loca.getOffset(i);
            if (len > 0) {
                short numberOfContours = raf.readShort();
                if (numberOfContours < 0) {
                    descript[i] = new TableGlyfCompositeDescript(this, raf);
                }
            }
        }
*/
    }

    public void init(int numGlyphs, LocaTable loca) {
        if (buf == null) {
            return;
        }
        descript = new GlyfDescript[numGlyphs];
        ByteArrayInputStream bais = new ByteArrayInputStream(buf);
        for (int i = 0; i < numGlyphs; i++) {
            int len = loca.getOffset((short)(i + 1)) - loca.getOffset(i);
            if (len > 0) {
                bais.reset();
                bais.skip(loca.getOffset(i));
                short numberOfContours = (short)(bais.read()<<8 | bais.read());
                if (numberOfContours >= 0) {
                    descript[i] = new GlyfSimpleDescript(this, numberOfContours, bais);
                }
            } else {
                descript[i] = null;
            }
        }

        for (int i = 0; i < numGlyphs; i++) {
            int len = loca.getOffset((short)(i + 1)) - loca.getOffset(i);
            if (len > 0) {
                bais.reset();
                bais.skip(loca.getOffset(i));
                short numberOfContours = (short)(bais.read()<<8 | bais.read());
                if (numberOfContours < 0) {
                    descript[i] = new GlyfCompositeDescript(this, bais);
                }
            }
        }
        buf = null;
    }

    public GlyfDescript getDescription(int i) {
        return descript[i];
    }

    @Override
    public int getType() {
        return glyf;
    }
}