Package com.aelitis.azureus.core.util.png

Source Code of com.aelitis.azureus.core.util.png.IHDRChunk

/*
* Created on Feb 5, 2008
* Created by Olivier Chalouhi
*
* Copyright 2008 Vuze, Inc.  All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License only.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/

package com.aelitis.azureus.core.util.png;

import java.nio.ByteBuffer;

public class IHDRChunk extends CRCedChunk {
 
  private static final byte[] type = {(byte) 73, (byte72, (byte68, (byte82};
 
  private int width;
  private int height;
 
  public IHDRChunk(int width, int height) {
    super(type);
    this.width = width;
    this.height = height;
  }
 
  public byte[] getContentPayload() {
    ByteBuffer buffer = ByteBuffer.allocate(13);
   
    //width : 4 bytes
    buffer.putInt(width);
   
    //height : 4 bytes
    buffer.putInt(height);
   
    //color depth : 1 byte
    buffer.put((byte)8);
   
    //color type : 1 byte
    buffer.put((byte)0);
   
    //compression method : 1 byte
    buffer.put((byte)0);
   
    //filter method : 1 byte
    buffer.put((byte)0);
   
    //interlace method : 1 byte
    buffer.put((byte)0);
   
    return buffer.array();
   
  }

}
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