Example usage for javax.imageio.metadata IIOMetadataNode setUserObject

Introduction

In this page you can find the example usage for javax.imageio.metadata IIOMetadataNode setUserObject.

Prototype

public void setUserObject(Object userObject) 

Source Link

Document

Sets the value associated with this node.

Usage

From source file:net.d53dev.dslfy.web.service.GifService.java

private void configureGIFFrame(IIOMetadata meta, String delayTime, int imageIndex, String disposalMethod,
        int loopCount) {
    String metaFormat = meta.getNativeMetadataFormatName();

    if (!"javax_imageio_gif_image_1.0".equals(metaFormat)) {
        throw new IllegalArgumentException("Unfamiliar gif metadata format: " + metaFormat);
    }//from  w  w w .j a va2s .c  o m

    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", disposalMethod);

    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) (loopCount & 0xFF), (byte) ((loopCount >> 8) & 0xFF) };
        ae.setUserObject(uo);
        aes.appendChild(ae);
        root.appendChild(aes);
    }

    try {
        meta.setFromTree(metaFormat, root);
    } catch (IIOInvalidTreeException e) {
        throw new Error(e);
    }
}

---

From source file:org.photovault.imginfo.CreateCopyImageCommand.java

/**
 Helper function to save a rendered image to file
 @param instanceFile The file into which the image will be saved
 @param img Image that willb e saved//  w ww .  j a  v  a 2  s.  c om
 @param xmpData XPM metadata packet that should be saved with the image
 @throws PhotovaultException if saving does not succeed
 */
protected void saveImage(File instanceFile, RenderedImage img, byte[] xmpData) throws PhotovaultException {
    ImageOutputStream out = null;
    log.debug("Entry: saveImage, file = " + instanceFile.getAbsolutePath());
    try {
        out = new FileImageOutputStream(instanceFile);
    } catch (IOException e) {
        log.error("Error writing image: " + e.getMessage());
        throw new PhotovaultException(e.getMessage());
    }
    if (img.getSampleModel().getSampleSize(0) == 16) {
        log.debug("16 bit image, converting to 8 bits");
        double[] subtract = new double[1];
        subtract[0] = 0;
        double[] divide = new double[1];
        divide[0] = 1. / 256.;
        // Now we can rescale the pixels gray levels:
        ParameterBlock pbRescale = new ParameterBlock();
        pbRescale.add(divide);
        pbRescale.add(subtract);
        pbRescale.addSource(img);
        PlanarImage outputImage = (PlanarImage) JAI.create("rescale", pbRescale, null);
        // Make sure it is a byte image - force conversion.
        ParameterBlock pbConvert = new ParameterBlock();
        pbConvert.addSource(outputImage);
        pbConvert.add(DataBuffer.TYPE_BYTE);
        img = JAI.create("format", pbConvert);
    }

    IIOImage iioimg = new IIOImage(img, null, null);

    /*
     Not all encoders support metadata handling
     */
    Iterator writers = ImageIO.getImageWritersByFormatName("jpeg");
    ImageWriter imgwriter = null;
    while (writers.hasNext()) {
        imgwriter = (ImageWriter) writers.next();
        if (imgwriter.getClass().getName().endsWith("JPEGImageEncoder")) {
            // Break on finding the core provider.
            break;
        }
    }
    if (imgwriter == null) {
        System.err.println("Cannot find core JPEG writer!");
    }
    imgwriter.addIIOWriteWarningListener(new IIOWriteWarningListener() {

        public void warningOccurred(ImageWriter arg0, int arg1, String arg2) {
            log.warn("Warning from ImageWriter: " + arg2);
        }
    });
    ImageWriteParam params = imgwriter.getDefaultWriteParam();
    ImageTypeSpecifier its = ImageTypeSpecifier.createFromRenderedImage(img);
    IIOMetadata metadata = imgwriter.getDefaultImageMetadata(its, null);

    IIOMetadataNode metatop = (IIOMetadataNode) metadata.getAsTree("javax_imageio_jpeg_image_1.0");
    NodeList markerSeqNodes = metatop.getElementsByTagName("markerSequence");
    if (markerSeqNodes.getLength() > 0) {
        IIOMetadataNode xmpNode = new IIOMetadataNode("unknown");
        xmpNode.setAttribute("MarkerTag", "225");
        xmpNode.setUserObject(xmpData);
        markerSeqNodes.item(0).appendChild(xmpNode);
    }

    try {
        metadata.setFromTree("javax_imageio_jpeg_image_1.0", metatop);
    } catch (Exception e) {
        log.warn("error editing metadata: " + e.getMessage());
        e.printStackTrace();
        throw new PhotovaultException("error setting image metadata: \n" + e.getMessage());
    }

    iioimg.setMetadata(metadata);

    try {
        imgwriter.setOutput(out);
        imgwriter.write(iioimg);
    } catch (IOException e) {
        log.warn("Exception while encoding" + e.getMessage());
        throw new PhotovaultException(
                "Error writing instance " + instanceFile.getAbsolutePath() + ": " + e.getMessage());
    } finally {
        try {
            out.close();
        } catch (IOException e) {
            log.warn("Exception while closing file: " + e.getMessage());
            imgwriter.dispose();
            throw new PhotovaultException(
                    "Error writing instance " + instanceFile.getAbsolutePath() + ": " + e.getMessage());

        }
        imgwriter.dispose();
    }
    log.debug("Exit: saveImage");
}

---