There are 3 code examples for javax.imageio.stream.ImageOutputStream.

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/** 
 * Encodes an image in JPEG format and writes it to an output stream.
 * @param bufferedImage  the image to be encoded (<code>null</code> not
 * permitted).
 * @param outputStream  the OutputStream to write the encoded image to
 * (<code>null</code> not permitted).
 * @throws IOException if there is an I/O problem.
 * @throws NullPointerException if <code>bufferedImage</code> is
 * <code>null</code>.
 */
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.");
  }
  Iterator iterator=ImageIO.getImageWritersByFormatName("jpeg");
  ImageWriter writer=(ImageWriter)iterator.next();
  ImageWriteParam p=writer.getDefaultWriteParam();
  p.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
  p.setCompressionQuality(this.quality);
  ImageOutputStream ios=ImageIO.createImageOutputStream(outputStream);
  writer.setOutput(ios);
  writer.write(null,new IIOImage(bufferedImage,null,null),p);
  ios.flush();
  writer.dispose();
  ios.close();
}
 

protected void saveImage(String fileName){
  BufferedImage bi;
  Graphics2D gr2;
  ImageWriter writer;
  Iterator iter;
  ImageOutputStream ios;
  ImageWriteParam param;
  try {
    bi=new BufferedImage(m_panelWidth,m_panelHeight,BufferedImage.TYPE_INT_RGB);
    gr2=bi.createGraphics();
    gr2.drawImage(m_osi,0,0,m_panelWidth,m_panelHeight,null);
    writer=null;
    iter=ImageIO.getImageWritersByFormatName("jpg");
    if (iter.hasNext())     writer=(ImageWriter)iter.next();
 else     throw new Exception("No JPEG writer available!");
    ios=ImageIO.createImageOutputStream(new File(fileName));
    writer.setOutput(ios);
    param=new JPEGImageWriteParam(Locale.getDefault());
    param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
    param.setCompressionQuality(1.0f);
    writer.write(null,new IIOImage(bi,null,null),param);
    ios.flush();
    writer.dispose();
    ios.close();
  }
 catch (  Exception e) {
    e.printStackTrace();
  }
}
 

/** 
 * generates the actual output.
 * @throws Exception	if something goes wrong
 */
public void generateOutput() throws Exception {
  BufferedImage bi;
  Graphics g;
  ImageWriter writer;
  Iterator iter;
  ImageOutputStream ios;
  ImageWriteParam param;
  bi=new BufferedImage(getComponent().getWidth(),getComponent().getHeight(),BufferedImage.TYPE_INT_RGB);
  g=bi.getGraphics();
  g.setPaintMode();
  g.setColor(getBackground());
  if (g instanceof Graphics2D)   ((Graphics2D)g).scale(getXScale(),getYScale());
  g.fillRect(0,0,getComponent().getWidth(),getComponent().getHeight());
  getComponent().printAll(g);
  writer=null;
  iter=ImageIO.getImageWritersByFormatName(getExtension().replace(".",""));
  if (iter.hasNext())   writer=(ImageWriter)iter.next();
 else   throw new Exception("No writer available for " + getDescription() + "!");
  ios=ImageIO.createImageOutputStream(getFile());
  writer.setOutput(ios);
  param=new JPEGImageWriteParam(Locale.getDefault());
  param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
  param.setCompressionQuality(getQuality());
  writer.write(null,new IIOImage(bi,null,null),param);
  ios.flush();
  writer.dispose();
  ios.close();
}
 

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