Examples with ImageReaderSpi javax.imageio.spi.ImageReaderSpi used on opensource projects

Example 6 with ImageReaderSpi

use of javax.imageio.spi.ImageReaderSpi in project jdk8u_jdk by JetBrains.

the class ImageIO method getImageWriter.

/**
     * Returns an <code>ImageWriter</code>corresponding to the given
     * <code>ImageReader</code>, if there is one, or <code>null</code>
     * if the plug-in for this <code>ImageReader</code> does not
     * specify a corresponding <code>ImageWriter</code>, or if the
     * given <code>ImageReader</code> is not registered.  This
     * mechanism may be used to obtain an <code>ImageWriter</code>
     * that will understand the internal structure of non-pixel
     * metadata (as encoded by <code>IIOMetadata</code> objects)
     * generated by the <code>ImageReader</code>.  By obtaining this
     * data from the <code>ImageReader</code> and passing it on to the
     * <code>ImageWriter</code> obtained with this method, a client
     * program can read an image, modify it in some way, and write it
     * back out preserving all metadata, without having to understand
     * anything about the structure of the metadata, or even about
     * the image format.  Note that this method returns the
     * "preferred" writer, which is the first in the list returned by
     * <code>javax.imageio.spi.ImageReaderSpi.getImageWriterSpiNames()</code>.
     *
     * @param reader an instance of a registered <code>ImageReader</code>.
     *
     * @return an <code>ImageWriter</code>, or null.
     *
     * @exception IllegalArgumentException if <code>reader</code> is
     * <code>null</code>.
     *
     * @see #getImageReader(ImageWriter)
     * @see javax.imageio.spi.ImageReaderSpi#getImageWriterSpiNames()
     */
public static ImageWriter getImageWriter(ImageReader reader) {
    if (reader == null) {
        throw new IllegalArgumentException("reader == null!");
    }
    ImageReaderSpi readerSpi = reader.getOriginatingProvider();
    if (readerSpi == null) {
        Iterator readerSpiIter;
        // Ensure category is present
        try {
            readerSpiIter = theRegistry.getServiceProviders(ImageReaderSpi.class, false);
        } catch (IllegalArgumentException e) {
            return null;
        }
        while (readerSpiIter.hasNext()) {
            ImageReaderSpi temp = (ImageReaderSpi) readerSpiIter.next();
            if (temp.isOwnReader(reader)) {
                readerSpi = temp;
                break;
            }
        }
        if (readerSpi == null) {
            return null;
        }
    }
    String[] writerNames = readerSpi.getImageWriterSpiNames();
    if (writerNames == null) {
        return null;
    }
    Class writerSpiClass = null;
    try {
        writerSpiClass = Class.forName(writerNames[0], true, ClassLoader.getSystemClassLoader());
    } catch (ClassNotFoundException e) {
        return null;
    }
    ImageWriterSpi writerSpi = (ImageWriterSpi) theRegistry.getServiceProviderByClass(writerSpiClass);
    if (writerSpi == null) {
        return null;
    }
    try {
        return writerSpi.createWriterInstance();
    } catch (IOException e) {
        // Deregister the spi in this case, but only as a writerSpi
        theRegistry.deregisterServiceProvider(writerSpi, ImageWriterSpi.class);
        return null;
    }
}

Example 7 with ImageReaderSpi

use of javax.imageio.spi.ImageReaderSpi in project jdk8u_jdk by JetBrains.

the class ImageIO method getImageTranscoders.

/**
     * Returns an <code>Iterator</code> containing all currently
     * registered <code>ImageTranscoder</code>s that claim to be
     * able to transcode between the metadata of the given
     * <code>ImageReader</code> and <code>ImageWriter</code>.
     *
     * @param reader an <code>ImageReader</code>.
     * @param writer an <code>ImageWriter</code>.
     *
     * @return an <code>Iterator</code> containing
     * <code>ImageTranscoder</code>s.
     *
     * @exception IllegalArgumentException if <code>reader</code> or
     * <code>writer</code> is <code>null</code>.
     */
public static Iterator<ImageTranscoder> getImageTranscoders(ImageReader reader, ImageWriter writer) {
    if (reader == null) {
        throw new IllegalArgumentException("reader == null!");
    }
    if (writer == null) {
        throw new IllegalArgumentException("writer == null!");
    }
    ImageReaderSpi readerSpi = reader.getOriginatingProvider();
    ImageWriterSpi writerSpi = writer.getOriginatingProvider();
    ServiceRegistry.Filter filter = new TranscoderFilter(readerSpi, writerSpi);
    Iterator iter;
    // Ensure category is present
    try {
        iter = theRegistry.getServiceProviders(ImageTranscoderSpi.class, filter, true);
    } catch (IllegalArgumentException e) {
        return Collections.emptyIterator();
    }
    return new ImageTranscoderIterator(iter);
}

Example 8 with ImageReaderSpi

use of javax.imageio.spi.ImageReaderSpi in project jdk8u_jdk by JetBrains.

the class InputImageTests method initIIOReadFormats.

private static void initIIOReadFormats() {
    List spis = new ArrayList();
    List shortNames = new ArrayList();
    ImageIO.scanForPlugins();
    IIORegistry registry = IIORegistry.getDefaultInstance();
    java.util.Iterator readerspis = registry.getServiceProviders(ImageReaderSpi.class, false);
    while (readerspis.hasNext()) {
        // REMIND: there could be more than one non-core plugin for
        // a particular format, as is the case for JPEG2000 in the JAI
        // IIO Tools package, so we should support that somehow
        ImageReaderSpi spi = (ImageReaderSpi) readerspis.next();
        String klass = spi.getClass().getName();
        String format = spi.getFormatNames()[0].toLowerCase();
        String suffix = spi.getFileSuffixes()[0].toLowerCase();
        if (suffix == null || suffix.equals("")) {
            suffix = format;
        }
        String shortName;
        if (klass.startsWith("com.sun.imageio.plugins")) {
            shortName = "core-" + suffix;
        } else {
            shortName = "ext-" + suffix;
        }
        spis.add(spi);
        shortNames.add(shortName);
    }
    imageioReaderSpis = new ImageReaderSpi[spis.size()];
    imageioReaderSpis = (ImageReaderSpi[]) spis.toArray(imageioReaderSpis);
    imageioReadFormatShortNames = new String[shortNames.size()];
    imageioReadFormatShortNames = (String[]) shortNames.toArray(imageioReadFormatShortNames);
}

Example 9 with ImageReaderSpi

use of javax.imageio.spi.ImageReaderSpi in project jdk8u_jdk by JetBrains.

the class GetNumImages method main.

public static void main(String[] args) throws Exception {
    IIORegistry registry = IIORegistry.getDefaultInstance();
    // test ImageReader.getNumImages() for all available ImageReaders,
    // with no source set
    Iterator readerspis = registry.getServiceProviders(ImageReaderSpi.class, false);
    while (readerspis.hasNext()) {
        boolean caughtEx = false;
        ImageReaderSpi readerspi = (ImageReaderSpi) readerspis.next();
        ImageReader reader = readerspi.createReaderInstance();
        try {
            reader.getNumImages(false);
        } catch (IllegalStateException ise) {
            // caught exception, everything's okay
            caughtEx = true;
        }
        if (!caughtEx) {
            throw new RuntimeException("Test failed: exception was not " + "thrown for null input: " + reader);
        }
    }
    // test ImageReader.getNumImages() for all available ImageReaders,
    // with source set, seekForwardOnly and allowSearch both true
    readerspis = registry.getServiceProviders(ImageReaderSpi.class, false);
    while (readerspis.hasNext()) {
        boolean caughtEx = false;
        ImageReaderSpi readerspi = (ImageReaderSpi) readerspis.next();
        ImageReader reader = readerspi.createReaderInstance();
        byte[] barr = new byte[100];
        ByteArrayInputStream bais = new ByteArrayInputStream(barr);
        ImageInputStream iis = ImageIO.createImageInputStream(bais);
        try {
            reader.setInput(iis, true);
            reader.getNumImages(true);
        } catch (IllegalStateException ise) {
            // caught exception, everything's okay
            caughtEx = true;
        }
        if (!caughtEx) {
            throw new RuntimeException("Test failed: exception was not " + "thrown when allowSearch and " + "seekForwardOnly are both true: " + reader);
        }
    }
}

Example 10 with ImageReaderSpi

use of javax.imageio.spi.ImageReaderSpi in project jdk8u_jdk by JetBrains.

the class NullInputOutput method main.

public static void main(String[] args) throws Exception {
    IIORegistry registry = IIORegistry.getDefaultInstance();
    // test ImageReader.read() for all available ImageReaders
    Iterator readerspis = registry.getServiceProviders(ImageReaderSpi.class, false);
    while (readerspis.hasNext()) {
        ImageReaderSpi readerspi = (ImageReaderSpi) readerspis.next();
        ImageReader reader = readerspi.createReaderInstance();
        try {
            reader.read(0);
        } catch (IllegalStateException ise) {
        // caught exception, everything's okay
        }
    }
    // test ImageWriter.write() for all available ImageWriters
    BufferedImage bi = new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB);
    Iterator writerspis = registry.getServiceProviders(ImageWriterSpi.class, false);
    while (writerspis.hasNext()) {
        ImageWriterSpi writerspi = (ImageWriterSpi) writerspis.next();
        ImageWriter writer = writerspi.createWriterInstance();
        try {
            writer.write(bi);
        } catch (IllegalStateException ise) {
        // caught exception, everything's okay
        }
    }
}