content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library 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 Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
   * in the United States and other countries.]
   *
   * ------------------------------
   * KeypointPNGEncoderAdapter.java
   * ------------------------------
   * (C) Copyright 2004-2008, by Richard Atkinson and Contributors.
   *
   * Original Author:  Richard Atkinson;
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 01-Aug-2004 : Initial version (RA);
   * 02-Feb-2007 : Removed author tags all over JFreeChart sources (DG);
   *
   */
  
  package org.jfree.chart.encoders;
  
  import java.awt.image.BufferedImage;
  import java.io.IOException;
  import java.io.OutputStream;
  
  import com.keypoint.PngEncoder;
  
  /**
   * Adapter class for the Keypoint PNG Encoder.  The ImageEncoderFactory will
   * only return a reference to this class by default if the library has been
   * compiled under a JDK < 1.4 or is being run using a JDK < 1.4.
   */
  public class KeypointPNGEncoderAdapter implements ImageEncoder {
  
      /** The quality setting. */
      private int quality = 9;
  
      /** Encode alpha? */
      private boolean encodingAlpha = false;
  
      /**
       * Get the quality of the image encoding.  The underlying encoder uses int
       * values:  0 for no compression, and values 1 through 9 for various levels
       * of compression (1 is best speed, 9 is best compression).
       *
       * @return A float representing the quality.
       */
      public float getQuality() {
          return this.quality;
      }
  
      /**
       * Set the quality of the image encoding (supported).  The underlying
       * encoder uses int values:  0 for no compression, and values 1 through 9
       * for various levels of compression (1 is best speed, 9 is best
       * compression).
       *
       * @param quality  A float representing the quality.
       */
      public void setQuality(float quality) {
          this.quality = (int) quality;
      }
  
      /**
       * Get whether the encoder should encode alpha transparency.
       *
       * @return Whether the encoder is encoding alpha transparency.
       */
      public boolean isEncodingAlpha() {
          return this.encodingAlpha;
      }
  
      /**
       * Set whether the encoder should encode alpha transparency (supported).
       *
       * @param encodingAlpha  Whether the encoder should encode alpha
       *                       transparency.
       */
      public void setEncodingAlpha(boolean encodingAlpha) {
          this.encodingAlpha = encodingAlpha;
      }
  
      /**
       * Encodes an image in PNG format.
       *
       * @param bufferedImage  The image to be encoded.
       * @return The byte[] that is the encoded image.
       * @throws IOException
       */
      public byte[] encode(BufferedImage bufferedImage) throws IOException {
          if (bufferedImage == null) {
              throw new IllegalArgumentException("Null 'image' argument.");
          }
          PngEncoder encoder = new PngEncoder(bufferedImage, this.encodingAlpha,
                  0, this.quality);
          return encoder.pngEncode();
      }
  
      /**
       * Encodes an image in PNG format and writes it to an
       * <code>OutputStream</code>.
       *
       * @param bufferedImage  The image to be encoded.
       * @param outputStream  The OutputStream to write the encoded image to.
       * @throws IOException
       */
      public void encode(BufferedImage bufferedImage, OutputStream outputStream)
          throws IOException {
          if (bufferedImage == null) {
              throw new IllegalArgumentException("Null 'image' argument.");
          }
          if (outputStream == null) {
              throw new IllegalArgumentException("Null 'outputStream' argument.");
          }
          PngEncoder encoder = new PngEncoder(bufferedImage, this.encodingAlpha,
                  0, this.quality);
          outputStream.write(encoder.pngEncode());
      }
  
  }
  