/**
* @see ImageWriter#writeImage(java.awt.image.RenderedImage, java.io.OutputStream,
* ImageWriterParams)
*/
public void writeImage(RenderedImage image, OutputStream out, ImageWriterParams params)
throws IOException {
Iterator iter;
iter = ImageIO.getImageWritersByMIMEType(getMIMEType());
javax.imageio.ImageWriter iiowriter = null;
try {
iiowriter = (javax.imageio.ImageWriter) iter.next();
if (iiowriter != null) {
iiowriter.addIIOWriteWarningListener(this);
ImageOutputStream imgout = null;
try {
imgout = ImageIO.createImageOutputStream(out);
ImageWriteParam iwParam = getDefaultWriteParam(iiowriter, image, params);
ImageTypeSpecifier type;
if (iwParam.getDestinationType() != null) {
type = iwParam.getDestinationType();
} else {
type = ImageTypeSpecifier.createFromRenderedImage(image);
}
// Handle metadata
IIOMetadata meta = iiowriter.getDefaultImageMetadata(type, iwParam);
// meta might be null for some JAI codecs as they don't support metadata
if (params != null && meta != null) {
meta = updateMetadata(meta, params);
}
// Write image
iiowriter.setOutput(imgout);
IIOImage iioimg = new IIOImage(image, null, meta);
iiowriter.write(null, iioimg, iwParam);
} finally {
if (imgout != null) {
System.err.println("closing");
imgout.close();
}
}
} else {
throw new UnsupportedOperationException(
"No ImageIO codec for writing " + getMIMEType() + " is available!");
}
} finally {
if (iiowriter != null) {
System.err.println("disposing");
iiowriter.dispose();
}
}
}
public void initialize() {
if (log.isTraceEnabled()) {
String s = "Available JPEG image writers:";
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("jpeg");
while (writers.hasNext()) {
ImageWriter w = writers.next();
s += "\n\t" + w.getClass().getName();
}
log.trace(s);
}
jpegImageWriter = ImageIO.getImageWritersByFormatName("jpeg").next();
if (jpegImageWriter == null)
throw new NullPointerException("Unable to create a JPEG image writer");
jpegImageWriter.addIIOWriteWarningListener(ImageWriterWarningListener.INSTANCE);
log.debug("Used JPEG image writer: " + jpegImageWriter.getClass().getName());
iwp = jpegImageWriter.getDefaultWriteParam();
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwp.setCompressionQuality(jpegCompressionLevel);
}