/*
    * Copyright 2007 - 2009 JEuclid, http://jeuclid.sf.net
    * 
    * Licensed 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.
   */
  
  /* $Id: ImageIOConverter.java,v 916bcda78280 2009/08/28 07:32:36 max $ */
  
  package net.sourceforge.jeuclid.converter;
  
  import java.awt.Dimension;
  import java.awt.image.BufferedImage;
  import java.io.IOException;
  import java.io.OutputStream;
  
  import javax.imageio.ImageWriter;
  import javax.imageio.stream.ImageOutputStream;
  import javax.imageio.stream.MemoryCacheImageOutputStream;
  
  import net.sourceforge.jeuclid.LayoutContext;
  
  import org.w3c.dom.Node;
  
  /**
   * supports conversion to standard Raster formats through ImageIO.
   * 
   * @version $Revision: 916bcda78280 $
   */
  public class ImageIOConverter implements ConverterPlugin {
  
      private final ImageWriter writer;
  
      private final int colorModel;
  
      /**
       * Default constructor.
       * 
       * @param iw
       *            ImageWrite instance to use for this converter.
       * @param noAlpha
       *            if true, this image format does not support alpha values.
       */
      ImageIOConverter(final ImageWriter iw, final boolean noAlpha) {
          this.writer = iw;
          if (noAlpha) {
              this.colorModel = BufferedImage.TYPE_INT_RGB;
          } else {
              this.colorModel = BufferedImage.TYPE_INT_ARGB;
          }
      }
  
      /** {@inheritDoc} */
      public Dimension convert(final Node doc, final LayoutContext context,
              final OutputStream outStream) throws IOException {
          final ImageOutputStream ios = new MemoryCacheImageOutputStream(
                  outStream);
          final BufferedImage image = Converter.getInstance().render(doc,
                  context, this.colorModel);
          synchronized (this.writer) {
              this.writer.setOutput(ios);
              this.writer.write(image);
          }
          ios.close();
          return new Dimension(image.getWidth(), image.getHeight());
      }
  
      /** {@inheritDoc} */
      public DocumentWithDimension convert(final Node doc,
              final LayoutContext context) {
          return null;
      }
  
  }