/*

   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You 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.IOException;
import java.io.RandomAccessFile;

/**
 *
 * @author <a href="mailto:david@steadystate.co.uk">David Schweinsberg</a>
 * @version $Id$
 */
public class SingleSubstFormat2 extends SingleSubst {

    private int coverageOffset;
    private int glyphCount;
    private int[] substitutes;
    private Coverage coverage;

    /** Creates new SingleSubstFormat2 */
    protected SingleSubstFormat2(RandomAccessFile raf, int offset) throws IOException {
        coverageOffset = raf.readUnsignedShort();
        glyphCount = raf.readUnsignedShort();
        substitutes = new int[glyphCount];
        for (int i = 0; i < glyphCount; i++) {
            substitutes[i] = raf.readUnsignedShort();
        }
        raf.seek(offset + coverageOffset);
        coverage = Coverage.read(raf);
    }

    public int getFormat() {
        return 2;
    }

    public int substitute(int glyphId) {
        int i = coverage.findGlyph(glyphId);
        if (i > -1) {
            return substitutes[i];
        }
        return glyphId;
    }

}