/**
 * Copyright (c) 2004, www.pdfbox.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 pdfbox; 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
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
package org.pdfbox.ttf;

import java.io.IOException;

/**
 * A table in a true type font.
 * 
 * @author Ben Litchfield (ben@csh.rit.edu)
 * @version $Revision: 1.1 $
 */
public class HorizontalMetricsTable extends TTFTable
{
    /**
     * A tag that identifies this table type.
     */
    public static final String TAG = "hmtx";
    
    private int[] advanceWidth;
    private short[] leftSideBearing;
    private short[] nonHorizontalLeftSideBearing;
    
    /**
     * 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
    {
        HorizontalHeaderTable hHeader = ttf.getHorizontalHeader();
        MaximumProfileTable maxp = ttf.getMaximumProfile();
        int numHMetrics = hHeader.getNumberOfHMetrics();
        int numGlyphs = maxp.getNumGlyphs();
        
        advanceWidth = new int[ numHMetrics ];
        leftSideBearing = new short[ numHMetrics ];
        for( int i=0; i<numHMetrics; i++ )
        {
            advanceWidth[i] = data.readUnsignedShort();
            leftSideBearing[i] = data.readSignedShort();
        }
        
        int numberNonHorizontal = numGlyphs - numHMetrics;
        nonHorizontalLeftSideBearing = new short[ numberNonHorizontal ];
        for( int i=0; i<numberNonHorizontal; i++ )
        {
            nonHorizontalLeftSideBearing[i] = data.readSignedShort();
        }
    }
    /**
     * @return Returns the advanceWidth.
     */
    public int[] getAdvanceWidth()
    {
        return advanceWidth;
    }
    /**
     * @param advanceWidthValue The advanceWidth to set.
     */
    public void setAdvanceWidth(int[] advanceWidthValue)
    {
        this.advanceWidth = advanceWidthValue;
    }
}
