Java 类javax.imageio.metadata.IIOMetadata 实例源码

public static void main(String[] args) throws IOException {
    String fileName = "nomarkers.jpg";
    String sep = System.getProperty("file.separator");
    String dir = System.getProperty("test.src", ".");
    String filePath = dir+sep+fileName;
    System.out.println("Test file: " + filePath);
    File file = new File(filePath);
    ImageInputStream stream = ImageIO.createImageInputStream(file);
    Iterator<ImageReader> readers = ImageIO.getImageReaders(stream);

    if(readers.hasNext()) {
        ImageReader reader = readers.next();
        reader.setInput(stream);
        IIOMetadata metadata = reader.getImageMetadata(0);

        IIOMetadataNode standardTree = (IIOMetadataNode)
            metadata.getAsTree
            (IIOMetadataFormatImpl.standardMetadataFormatName);
        IIOMetadataNode colorSpaceType = (IIOMetadataNode)
            standardTree.getElementsByTagName("ColorSpaceType").item(0);
        String colorSpaceName = colorSpaceType.getAttribute("name");
        if(colorSpaceName.equals("RGB"))
            throw new RuntimeException("Identified incorrect ColorSpace");
    }
}

protected File writeImageWithHist(BufferedImage bi) throws IOException {
    File f = File.createTempFile("hist_", ".png", new File("."));

    ImageWriter writer = ImageIO.getImageWritersByFormatName("PNG").next();

    ImageOutputStream ios = ImageIO.createImageOutputStream(f);
    writer.setOutput(ios);

    ImageWriteParam param = writer.getDefaultWriteParam();
    ImageTypeSpecifier type = new ImageTypeSpecifier(bi);

    IIOMetadata imgMetadata = writer.getDefaultImageMetadata(type, param);

    /* add hIST node to image metadata */
    imgMetadata = upgradeMetadata(imgMetadata, bi);

    IIOImage iio_img = new IIOImage(bi,
                                    null, // no thumbnails
                                    imgMetadata);

    writer.write(iio_img);
    ios.flush();
    ios.close();
    return f;
}

public static void main(String[] args) {
    ImageWriter w = ImageIO.getImageWritersByFormatName(format).next();
    if (w == null) {
        throw new RuntimeException("No available writers for format " + format);
    }
    ImageWriteParam p = w.getDefaultWriteParam();

    ImageTypeSpecifier t =
            ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_INT_RGB);

    IIOMetadata m = w.getDefaultImageMetadata(t, p);
    System.out.println("Default image metadata is " + m);
    testWritableMetadata(m);

    IIOMetadata sm = w.getDefaultStreamMetadata(p);
    System.out.println("Default stream metadata is " + sm);
    testWritableMetadata(sm);
}

private void writeHeader(IIOMetadata streamMetadata, int bitsPerPixel)
  throws IOException {

    GIFWritableStreamMetadata sm;
    if (streamMetadata instanceof GIFWritableStreamMetadata) {
        sm = (GIFWritableStreamMetadata)streamMetadata;
    } else {
        sm = new GIFWritableStreamMetadata();
        Node root =
            streamMetadata.getAsTree(STREAM_METADATA_NAME);
        sm.setFromTree(STREAM_METADATA_NAME, root);
    }

    writeHeader(sm.version,
                sm.logicalScreenWidth,
                sm.logicalScreenHeight,
                sm.colorResolution,
                sm.pixelAspectRatio,
                sm.backgroundColorIndex,
                sm.sortFlag,
                bitsPerPixel,
                sm.globalColorTable);
}

public void prepareInsertEmpty(int imageIndex,
                               ImageTypeSpecifier imageType,
                               int width,
                               int height,
                               IIOMetadata imageMetadata,
                               List<? extends BufferedImage> thumbnails,
                               ImageWriteParam param) throws IOException {
    checkParamsEmpty(imageType, width, height, thumbnails);

    this.isInsertingEmpty = true;

    SampleModel emptySM = imageType.getSampleModel();
    RenderedImage emptyImage =
        new EmptyImage(0, 0, width, height,
                       0, 0, emptySM.getWidth(), emptySM.getHeight(),
                       emptySM, imageType.getColorModel());

    insert(imageIndex, new IIOImage(emptyImage, null, imageMetadata),
           param, false);
}

public IIOMetadata getImageMetadata(int imageIndex) throws IOException {

            if (input == null)
                throw new IllegalStateException();
            if (imageIndex >= 5 || imageIndex < 0)
                throw new IndexOutOfBoundsException();
            if (seekForwardOnly) {
                if (imageIndex < minIndex)
                    throw new IndexOutOfBoundsException();
                minIndex = imageIndex;
            }
            System.out.println("Current format class name " + DummyIIOMetadataFormatImpl.class.getName());
            return new DummyIIOMetadataImpl(true,
                                            DummyIIOMetadataFormatImpl.nativeMetadataFormatName,
                                            DummyIIOMetadataFormatImpl.class.getName(),
                                            null, null);
        }

public IIOMetadata getImageMetadata(int imageIndex) throws IIOException {
    seekToImage(imageIndex);
    TIFFImageMetadata im
            = new TIFFImageMetadata(imageMetadata.getRootIFD().getTagSetList());
    Node root
            = imageMetadata.getAsTree(TIFFImageMetadata.NATIVE_METADATA_FORMAT_NAME);
    im.setFromTree(TIFFImageMetadata.NATIVE_METADATA_FORMAT_NAME, root);
    return im;
}

public void write(IIOMetadata sm,
                  IIOImage iioimage,
                  ImageWriteParam p) throws IOException {
    if (stream == null) {
        throw new IllegalStateException("output == null!");
    }
    if (iioimage == null) {
        throw new IllegalArgumentException("iioimage == null!");
    }
    if (iioimage.hasRaster()) {
        throw new UnsupportedOperationException("canWriteRasters() == false!");
    }

    resetLocal();

    GIFWritableStreamMetadata streamMetadata;
    if (sm == null) {
        streamMetadata =
            (GIFWritableStreamMetadata)getDefaultStreamMetadata(p);
    } else {
        streamMetadata =
            (GIFWritableStreamMetadata)convertStreamMetadata(sm, p);
    }

    write(true, true, streamMetadata, iioimage, p);
}

@Override
public void write(IIOMetadata streamMetadata, IIOImage image, ImageWriteParam param) throws IOException {
  RenderedImage img = image.getRenderedImage();
  if (stream == null) {
    throw new IOException("Set an output first!");
  }
  if (param == null) {
    param = getDefaultWriteParam();
  }
  Rectangle sourceRegion = new Rectangle(0, 0, img.getWidth(), img.getHeight());
  if (param.getSourceRegion() != null) {
    sourceRegion = sourceRegion.intersection(param.getSourceRegion());
  }
  Raster raster = img.getData(sourceRegion);
  int quality = 85;
  if (param.getCompressionMode() == ImageWriteParam.MODE_EXPLICIT) {
    quality = (int) (param.getCompressionQuality() * 100);
  }
  try {
    stream.write(lib.encode(raster, quality).array());
  } catch (TurboJpegException e) {
    throw new IOException(e);
  }
}

private static ITXtTest readFrom(File f) {
    try (ImageInputStream imageInputStream =
            ImageIO.createImageInputStream(f)) {

        ImageReader r = ImageIO.getImageReaders(imageInputStream).next();
        r.setInput(imageInputStream);

        IIOImage dst = r.readAll(0, null);

        // look for iTXt node
        IIOMetadata m = dst.getMetadata();
        Node root = m.getAsTree(m.getNativeMetadataFormatName());
        Node n = root.getFirstChild();
        while (n != null && !"iTXt".equals(n.getNodeName())) {
            n = n.getNextSibling();
        }
        if (n == null) {
            throw new RuntimeException("No iTXt node!");
        }
        ITXtTest t = ITXtTest.getFromNode((IIOMetadataNode)n);
        return t;
    } catch (Throwable e) {
        throw new RuntimeException("Reading test failed.", e);
    }
}

public IIOMetadata getImageMetadata(int imageIndex)
    throws IOException {
    setThreadLock();
    try {
        // imageMetadataIndex will always be either a valid index or
        // -1, in which case imageMetadata will not be null.
        // So we can leave checking imageIndex for gotoImage.
        if ((imageMetadataIndex == imageIndex)
            && (imageMetadata != null)) {
            return imageMetadata;
        }

        cbLock.check();

        gotoImage(imageIndex);

        imageMetadata = new JPEGMetadata(false, false, iis, this);

        imageMetadataIndex = imageIndex;

        return imageMetadata;
    } finally {
        clearThreadLock();
    }
}

public void createAnimatedImage(BufferedImage bi, IIOMetadata metadata,
        ImageWriter writer, File outputFile) {
    try {

        fos = new FileOutputStream(outputFile);
        ImageOutputStream ios = ImageIO.createImageOutputStream(fos);
        System.out.println(ios);
        writer.setOutput(ios);

        ImageWriteParam param = writer.getDefaultWriteParam();
        IIOMetadata streamData = writer.getDefaultStreamMetadata(param);

        writer.prepareWriteSequence(streamData);
        ImageTypeSpecifier specify = new ImageTypeSpecifier(bi);
        IIOMetadata imgData = writer.convertImageMetadata(
                (IIOMetadata) metadata, specify, param);
        GIFImageMetadata gifData = setAnimationProperties(imgData);
        IIOImage iim = new IIOImage(bi, null, gifData);
        param.setProgressiveMode(param.MODE_DISABLED);
        writer.writeToSequence(iim, param);
        writer.endWriteSequence();
        ios.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

private void writeHeader(IIOMetadata streamMetadata, int bitsPerPixel)
  throws IOException {

    GIFWritableStreamMetadata sm;
    if (streamMetadata instanceof GIFWritableStreamMetadata) {
        sm = (GIFWritableStreamMetadata)streamMetadata;
    } else {
        sm = new GIFWritableStreamMetadata();
        Node root =
            streamMetadata.getAsTree(STREAM_METADATA_NAME);
        sm.setFromTree(STREAM_METADATA_NAME, root);
    }

    writeHeader(sm.version,
                sm.logicalScreenWidth,
                sm.logicalScreenHeight,
                sm.colorResolution,
                sm.pixelAspectRatio,
                sm.backgroundColorIndex,
                sm.sortFlag,
                bitsPerPixel,
                sm.globalColorTable);
}

private static void test(final ImageWriter writer) throws Exception {
    final File file = File.createTempFile("temp", ".img");
    file.deleteOnExit();
    final FileOutputStream fos = new FileOutputStream(file);
    final ImageOutputStream ios = ImageIO.createImageOutputStream(fos);
    writer.setOutput(ios);
    final IIOMetadata data = writer.getDefaultStreamMetadata(null);

    if (writer.canWriteSequence()) {
        writer.prepareWriteSequence(data);
    } else {
        try {
            writer.prepareWriteSequence(data);
            throw new RuntimeException(
                    "UnsupportedOperationException was not thrown");
        } catch (final UnsupportedOperationException ignored) {
            // expected
        }
    }
    writer.dispose();
    ios.close();
}

public void prepareWriteSequence(IIOMetadata streamMetadata)
  throws IOException {

    if (stream == null) {
        throw new IllegalStateException("Output is not set.");
    }

    resetLocal();

    // Save the possibly converted stream metadata as an instance variable.
    if (streamMetadata == null) {
        this.theStreamMetadata =
            (GIFWritableStreamMetadata)getDefaultStreamMetadata(null);
    } else {
        this.theStreamMetadata = new GIFWritableStreamMetadata();
        convertMetadata(STREAM_METADATA_NAME, streamMetadata,
                        theStreamMetadata);
    }

    this.isWritingSequence = true;
}

public void testGetAsTree() {
    ImageWriteParam p = w.getDefaultWriteParam();
    IIOMetadata m =
        w.getDefaultImageMetadata(ImageTypeSpecifier.createFromBufferedImageType(type), p);

    String format = m.getNativeMetadataFormatName();
    System.out.println("native format: " + format);

    int count = 0;
    try {
        while (count < 100) {
            System.out.println(" test " + count++);
            m.getAsTree(format);
        }
    } catch (OutOfMemoryError e) {
        System.gc();
        throw new RuntimeException("Test failed. Number of performed operations: " + count, e);
    }
}

private void writeHeader(IIOMetadata streamMetadata, int bitsPerPixel)
  throws IOException {

    GIFWritableStreamMetadata sm;
    if (streamMetadata instanceof GIFWritableStreamMetadata) {
        sm = (GIFWritableStreamMetadata)streamMetadata;
    } else {
        sm = new GIFWritableStreamMetadata();
        Node root =
            streamMetadata.getAsTree(STREAM_METADATA_NAME);
        sm.setFromTree(STREAM_METADATA_NAME, root);
    }

    writeHeader(sm.version,
                sm.logicalScreenWidth,
                sm.logicalScreenHeight,
                sm.colorResolution,
                sm.pixelAspectRatio,
                sm.backgroundColorIndex,
                sm.sortFlag,
                bitsPerPixel,
                sm.globalColorTable);
}

/**
 * Paints this panel to a PNG image with specified resolution and width.
 * The image height is computed so that the image has the same aspect 
 * ratio as this panel.
 * @param dpi the image resolution, in dots per inch.
 * @param win the image width, in inches.
 * @param fileName the name of the file to contain the PNG image.
 * @throws IOException when unable to save to file.
 */
public void paintToPng(double dpi, double win, String fileName) 
  throws IOException 
{
  BufferedImage image = paintToImage((int)ceil(dpi*win));
  // The two lines below are simple, but do not write resolution info to 
  // the PNG file. We want that info, especially for high-res images.
  //File file = new File(fileName);
  //ImageIO.write(image,"png",file);
  Iterator<ImageWriter> i = ImageIO.getImageWritersBySuffix("png");
  if (!i.hasNext())
    throw new IOException("cannot get a PNG image writer");
  ImageWriter iw = i.next();
  FileOutputStream fos = new FileOutputStream(fileName);
  ImageOutputStream ios = ImageIO.createImageOutputStream(fos);
  iw.setOutput(ios);
  ImageWriteParam iwp = iw.getDefaultWriteParam();
  ImageTypeSpecifier its = new ImageTypeSpecifier(image);
  IIOMetadata imd = iw.getDefaultImageMetadata(its,iwp);
  String format = "javax_imageio_png_1.0";
  IIOMetadataNode tree = (IIOMetadataNode)imd.getAsTree(format);
  IIOMetadataNode node = new IIOMetadataNode("pHYs");
  String dpm = Integer.toString((int)ceil(dpi/0.0254));
  node.setAttribute("pixelsPerUnitXAxis",dpm);
  node.setAttribute("pixelsPerUnitYAxis",dpm);
  node.setAttribute("unitSpecifier","meter");
  tree.appendChild(node);
  imd.setFromTree(format,tree);
  iw.write(new IIOImage(image,null,imd));
  ios.flush();
  ios.close();
  fos.flush();
  fos.close();
  iw.dispose();
}

/**
 * Configures the per frame metadata
 * 
 * @param meta the default meta data
 * @param delayTime the amount of time a frame is to stay on screen in hundreds of a second (millisecond value/10)
 * @param imageIndex the index of this frame
 * @throws IIOInvalidTreeException if the meta data cannot be set
 */
private void configureMetaData(IIOMetadata meta, String delayTime, int imageIndex) throws IIOInvalidTreeException {
    String metaFormat = meta.getNativeMetadataFormatName();
    Node root = meta.getAsTree(metaFormat);
    Node child = root.getFirstChild();
    while (child != null) {
        if ("GraphicControlExtension".equals(child.getNodeName())) {
            break;
        }
        child = child.getNextSibling();
    }
    IIOMetadataNode gce = (IIOMetadataNode) child;
    gce.setAttribute("userDelay", "FALSE");
    gce.setAttribute("delayTime", delayTime);
    gce.setAttribute("disposalMethod", "none");

    if (imageIndex == 0) {
        IIOMetadataNode aes = new IIOMetadataNode("ApplicationExtensions");
        IIOMetadataNode ae = new IIOMetadataNode("ApplicationExtension");
        ae.setAttribute("applicationID", "NETSCAPE");
        ae.setAttribute("authenticationCode", "2.0");
        byte[] uo = new byte[] { 0x1, (byte) (LOOP_COUNT & 0xFF), (byte) ((LOOP_COUNT >> 8) & 0xFF) };
        ae.setUserObject(uo);
        aes.appendChild(ae);
        root.appendChild(aes);
    }
    meta.setFromTree(metaFormat, root);     
}

public Dimension[] getPreferredThumbnailSizes(ImageTypeSpecifier imageType,
                                              ImageWriteParam param,
                                              IIOMetadata streamMetadata,
                                              IIOMetadata imageMetadata) {
    if (jfifOK(imageType, param, streamMetadata, imageMetadata)) {
        return preferredThumbSizes.clone();
    }
    return null;
}

public IIOMetadata
    getDefaultImageMetadata(ImageTypeSpecifier imageType,
                            ImageWriteParam param) {
    setThreadLock();
    try {
        return new JPEGMetadata(imageType, param, this);
    } finally {
        clearThreadLock();
    }
}

public IIOMetadata convertStreamMetadata(IIOMetadata inData,
                                         ImageWriteParam param) {
    // There isn't much we can do.  If it's one of ours, then
    // return it.  Otherwise just return null.  We use it only
    // for tables, so we can't get a default and modify it,
    // as this will usually not be what is intended.
    if (inData instanceof JPEGMetadata) {
        JPEGMetadata jpegData = (JPEGMetadata) inData;
        if (jpegData.isStream) {
            return inData;
        }
    }
    return null;
}

public static void main(String[] args) throws IIOInvalidTreeException {

        // getting the writer for the png format
        Iterator iter = ImageIO.getImageWritersByFormatName("png");
        ImageWriter writer = (ImageWriter) iter.next();

        // creating a color model
        ColorModel colorModel = ColorModel.getRGBdefault();

        // creating a sample model
        SampleModel sampleModel = colorModel.createCompatibleSampleModel(640, 480);

        // creating a default metadata object
        IIOMetadata metaData = writer.getDefaultImageMetadata(new ImageTypeSpecifier(colorModel, sampleModel), null);
        String formatName = metaData.getNativeMetadataFormatName();

        // first call
        Node metaDataNode = metaData.getAsTree(formatName);
        try {
            metaData.setFromTree(formatName, metaDataNode);
        } catch (Exception ex) {
            ex.printStackTrace();
        }

        // second call (bitdepht is already set to an invalid value)
        metaDataNode = metaData.getAsTree(formatName);

        metaData.setFromTree(formatName, metaDataNode);

    }

public void write(IIOMetadata streamMetadata,
                  IIOImage image,
                  ImageWriteParam param) throws IOException {
    setThreadLock();
    try {
        cbLock.check();

        writeOnThread(streamMetadata, image, param);
    } finally {
        clearThreadLock();
    }
}

public IIOMetadata getImageMetadata(int imageIndex) throws IIOException {
    checkIndex(imageIndex);

    int index = locateImage(imageIndex);
    if (index != imageIndex) {
        throw new IndexOutOfBoundsException("Bad image index!");
    }
    readMetadata();
    return imageMetadata;
}

private static void writeTo(File f, ITXtTest t) {
    BufferedImage src = createBufferedImage();
    try {
        ImageOutputStream imageOutputStream =
            ImageIO.createImageOutputStream(f);

        ImageTypeSpecifier imageTypeSpecifier =
            new ImageTypeSpecifier(src);
        ImageWriter imageWriter =
            ImageIO.getImageWritersByFormatName("PNG").next();

        imageWriter.setOutput(imageOutputStream);

        IIOMetadata m =
            imageWriter.getDefaultImageMetadata(imageTypeSpecifier, null);

        String format = m.getNativeMetadataFormatName();
        Node root = m.getAsTree(format);

        IIOMetadataNode iTXt = t.getNode();
        root.appendChild(iTXt);
        m.setFromTree(format, root);

        imageWriter.write(new IIOImage(src, null, m));
        imageOutputStream.close();
        System.out.println("Writing done.");
    } catch (Throwable e) {
        throw new RuntimeException("Writing test failed.", e);
    }
}

private void writeImage() throws Exception {

        OutputStream s = new BufferedOutputStream(new FileOutputStream(FILENAME));
        try (ImageOutputStream ios = ImageIO.createImageOutputStream(s)) {
            ImageWriter writer = getTIFFWriter();
            writer.setOutput(ios);

            BufferedImage img =
                new BufferedImage(SZ, SZ, BufferedImage.TYPE_INT_RGB);
            Graphics g = img.getGraphics();
            g.setColor(C);
            g.fillRect(0, 0, SZ, SZ);
            g.dispose();

            IIOMetadata metadata = writer.getDefaultImageMetadata(
                new ImageTypeSpecifier(img), writer.getDefaultWriteParam());

            TIFFDirectory dir = TIFFDirectory.createFromMetadata(metadata);

            // add some extension tags
            addASCIIField(dir, "GeoAsciiParamsTag", GEO_DATA, GEO_N);
            addASCIIField(dir, "DateTimeOriginal", EXIF_DATA, EXIF_N);
            addASCIIField(dir, "GPSStatus", GPS_DATA, GPS_N);

            dir.addTIFFField(new TIFFField(new TIFFTag(
                "CleanFaxData", FAX_N, 1 << TIFFTag.TIFF_SHORT), FAX_DATA));

            IIOMetadata data = dir.getAsMetadata();

            writer.write(new IIOImage(img, null, data));

            ios.flush();
            writer.dispose();
        }
    }

/**
 * Creates a default stream metadata object and merges in the
 * supplied metadata.
 */
public IIOMetadata convertStreamMetadata(IIOMetadata inData,
                                         ImageWriteParam param) {
    if (inData == null) {
        throw new IllegalArgumentException("inData == null!");
    }

    IIOMetadata sm = getDefaultStreamMetadata(param);

    convertMetadata(STREAM_METADATA_NAME, inData, sm);

    return sm;
}

/**
 * Creates a default image metadata object and merges in the
 * supplied metadata.
 */
public IIOMetadata convertImageMetadata(IIOMetadata inData,
                                        ImageTypeSpecifier imageType,
                                        ImageWriteParam param) {
    if (inData == null) {
        throw new IllegalArgumentException("inData == null!");
    }
    if (imageType == null) {
        throw new IllegalArgumentException("imageType == null!");
    }

    GIFWritableImageMetadata im =
        (GIFWritableImageMetadata)getDefaultImageMetadata(imageType,
                                                          param);

    // Save interlace flag state.

    boolean isProgressive = im.interlaceFlag;

    convertMetadata(IMAGE_METADATA_NAME, inData, im);

    // Undo change to interlace flag if not MODE_COPY_FROM_METADATA.

    if (param != null && param.canWriteProgressive() &&
        param.getProgressiveMode() != param.MODE_COPY_FROM_METADATA) {
        im.interlaceFlag = isProgressive;
    }

    return im;
}

private static void doTest(int mode) {
    String fileFormat = "bmp";
    try {
        ImageWriter iw = (ImageWriter)ImageIO.getImageWritersBySuffix(fileFormat).next();
        if(iw == null) {
            throw new RuntimeException("No available image writer for "
                                       + fileFormat
                                       + " Test failed.");
        }

        File file = new File("image." + fileFormat);
        ImageOutputStream ios = ImageIO.createImageOutputStream(file);
        iw.setOutput(ios);

        BufferedImage bimg = new BufferedImage(100,
                                               100, BufferedImage.TYPE_INT_RGB);
        Graphics g = bimg.getGraphics();
        g.setColor(Color.green);
        g.fillRect(0,0,100,100);

        ImageWriteParam param = iw.getDefaultWriteParam();

        param.setCompressionMode(mode);

        IIOMetadata meta = iw.getDefaultImageMetadata(new ImageTypeSpecifier(bimg),
                                                      param);

        IIOImage iioImg = new IIOImage(bimg, null, meta);
        iw.write(null, iioImg, param);
    } catch(Exception e) {
        e.printStackTrace();
        throw new RuntimeException("Test failed.");
    }
}

public static void main(String[] args) throws IOException {
    BufferedImage bi_rgb = createTestImage(BufferedImage.TYPE_INT_RGB);

    DestTypeTest bug = new DestTypeTest();
    byte[] rgb_data = bug.writeTest(bi_rgb);

    System.out.println("rgb jpeg data length is " + rgb_data.length);

    BufferedImage bi_argb = createTestImage(BufferedImage.TYPE_INT_ARGB);

    ImageWriteParam p = bug.getWriteParam();
    IIOMetadata m = bug.getMetadata(p);

    byte[] submeta_data = bug.writeTest(bi_argb, p, m);
    System.out.println("desttype and metadata jpeg data length is " + submeta_data.length);

    p = bug.getWriteParam();
    byte[] subbanded_data = bug.writeTest(bi_argb, p);
    System.out.println("desttype jpeg data length is " + subbanded_data.length);

    if (submeta_data.length > rgb_data.length) {
        throw new  RuntimeException("Too big result jpeg: " + submeta_data.length +
                                    "(rgb image size is " + rgb_data.length + ")");
    }
    if (subbanded_data.length > rgb_data.length) {
        throw new  RuntimeException("Too big result jpeg: " + subbanded_data.length +
                                    "(rgb image size is " + rgb_data.length + ")");
    }
}

public IIOMetadata convertStreamMetadata(IIOMetadata inData,
                                         ImageWriteParam param) {
    // There isn't much we can do.  If it's one of ours, then
    // return it.  Otherwise just return null.  We use it only
    // for tables, so we can't get a default and modify it,
    // as this will usually not be what is intended.
    if (inData instanceof JPEGMetadata) {
        JPEGMetadata jpegData = (JPEGMetadata) inData;
        if (jpegData.isStream) {
            return inData;
        }
    }
    return null;
}

/**
 * Merges {@code inData} into {@code outData}. The supplied
 * metadata format name is attempted first and failing that the standard
 * metadata format name is attempted.
 */
private void convertMetadata(String metadataFormatName,
                             IIOMetadata inData,
                             IIOMetadata outData) {
    String formatName = null;

    String nativeFormatName = inData.getNativeMetadataFormatName();
    if (nativeFormatName != null &&
        nativeFormatName.equals(metadataFormatName)) {
        formatName = metadataFormatName;
    } else {
        String[] extraFormatNames = inData.getExtraMetadataFormatNames();

        if (extraFormatNames != null) {
            for (int i = 0; i < extraFormatNames.length; i++) {
                if (extraFormatNames[i].equals(metadataFormatName)) {
                    formatName = metadataFormatName;
                    break;
                }
            }
        }
    }

    if (formatName == null &&
        inData.isStandardMetadataFormatSupported()) {
        formatName = STANDARD_METADATA_NAME;
    }

    if (formatName != null) {
        try {
            Node root = inData.getAsTree(formatName);
            outData.mergeTree(formatName, root);
        } catch(IIOInvalidTreeException e) {
            // ignore
        }
    }
}

public IIOMetadata convertImageMetadata(IIOMetadata inData,
                                        ImageTypeSpecifier imageType,
                                        ImageWriteParam param) {
    // TODO - deal with imageType
    if (inData instanceof PNGMetadata) {
        return (PNGMetadata)((PNGMetadata)inData).clone();
    } else {
        return new PNGMetadata(inData);
    }
}

public IIOMetadata getDefaultImageMetadata(ImageTypeSpecifier imageType,
                                           ImageWriteParam param) {
    BMPMetadata meta = new BMPMetadata();
    meta.bmpVersion = VERSION_3;
    meta.compression = getPreferredCompressionType(imageType);
    if (param != null
        && param.getCompressionMode() == ImageWriteParam.MODE_EXPLICIT) {
        meta.compression = BMPCompressionTypes.getType(param.getCompressionType());
    }
    meta.bitsPerPixel = (short)imageType.getColorModel().getPixelSize();
    return meta;
}

/**
 * Creates a default stream metadata object and merges in the
 * supplied metadata.
 */
public IIOMetadata convertStreamMetadata(IIOMetadata inData,
                                         ImageWriteParam param) {
    if (inData == null) {
        throw new IllegalArgumentException("inData == null!");
    }

    IIOMetadata sm = getDefaultStreamMetadata(param);

    convertMetadata(STREAM_METADATA_NAME, inData, sm);

    return sm;
}

public static void main(String[] args) throws IOException {
    ImageWriter iw =
        (ImageWriter)ImageIO.getImageWritersByFormatName("jpeg").next();

    ImageTypeSpecifier type =
        ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_INT_RGB);

    ImageOutputStream ios =
        ImageIO.createImageOutputStream(new File("MergeTreeTest.jpeg"));
    iw.setOutput(ios);

    IIOMetadata meta = iw.getDefaultImageMetadata(type, null);

    boolean isFailed = false;

    String[] fmts = meta.getMetadataFormatNames();
    for (int i=0; i<fmts.length; i++) {
        System.out.print("Format: " + fmts[i] + " ... ");
        Node root = meta.getAsTree(fmts[i]);
        try {
            meta.mergeTree(fmts[i], root);
        } catch (NullPointerException e) {
            throw new RuntimeException("Test failed for format " + fmts[i], e);
        }
        System.out.println("PASSED");
    }
}

public IIOMetadata getDefaultStreamMetadata(ImageWriteParam param) {
    setThreadLock();
    try {
        return new JPEGMetadata(param, this);
    } finally {
        clearThreadLock();
    }
}

@Override
public IIOMetadata getDefaultImageMetadata(ImageTypeSpecifier imageType,
                                           ImageWriteParam param) {
    PNGMetadata m = new PNGMetadata();
    m.initialize(imageType, imageType.getSampleModel().getNumBands());
    return m;
}

private Test(BMPImageWriteParam p, IIOMetadata md, BufferedImage i) {
    param = p;
    meta = md;
    img = i;


    description = "Compression type is " + p.getCompressionType();
}