/**
 * Copyright (c) 2005, www.fontbox.org
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of fontbox; nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * http://www.fontbox.org
 *
 */
package org.fontbox.ttf;

import java.io.IOException;

/**
 * A table in a true type font.
 * 
 * @author Ben Litchfield (ben@benlitchfield.com)
 * @version $Revision: 1.1 $
 */
public class IndexToLocationTable extends TTFTable
{
    private static final short SHORT_OFFSETS = 0;
    private static final short LONG_OFFSETS = 1;
    
    /**
     * A tag that identifies this table type.
     */
    public static final String TAG = "loca";
    
    private long[] offsets;
    
    /**
     * This will read the required data from the stream.
     * 
     * @param ttf The font that is being read.
     * @param data The stream to read the data from.
     * @throws IOException If there is an error reading the data.
     */
    public void initData( TrueTypeFont ttf, TTFDataStream data ) throws IOException
    {
        HeaderTable head = ttf.getHeader();
        MaximumProfileTable maxp = ttf.getMaximumProfile();
        int numGlyphs = maxp.getNumGlyphs();
        offsets = new long[ numGlyphs +1];
        for( int i=0; i<numGlyphs+1; i++ )
        {
            if( head.getIndexToLocFormat() == SHORT_OFFSETS )
            {
                offsets[i] = data.readUnsignedShort() * 2;
            }
            else if(  head.getIndexToLocFormat() == LONG_OFFSETS )
            {
                offsets[i] = data.readUnsignedInt();
            }
            else
            {
                throw new IOException( "Error:TTF.loca unknown offset format.");
            }
        }
    }
    /**
     * @return Returns the offsets.
     */
    public long[] getOffsets()
    {
        return offsets;
    }
    /**
     * @param offsetsValue The offsets to set.
     */
    public void setOffsets(long[] offsetsValue)
    {
        this.offsets = offsetsValue;
    }
}
