Example usage for javax.imageio ImageIO getImageReadersBySuffix

Introduction

In this page you can find the example usage for javax.imageio ImageIO getImageReadersBySuffix.

Prototype

public static Iterator<ImageReader> getImageReadersBySuffix(String fileSuffix) 

Source Link

Document

Returns an Iterator containing all currently registered ImageReader s that claim to be able to decode files with the given suffix.

Usage

From source file:org.olat.core.commons.services.image.spi.ImageHelperImpl.java

private static SizeAndBufferedImage getImage(ImageInputStream stream, String suffix) {
    Iterator<ImageReader> iter = ImageIO.getImageReadersBySuffix(suffix);
    if (iter.hasNext()) {
        ImageReader reader = iter.next();
        try {// ww w. j ava2s.com
            reader.setInput(stream, true, true);
            int width = reader.getWidth(reader.getMinIndex());
            int height = reader.getHeight(reader.getMinIndex());
            Size size = new Size(width, height, false);
            SizeAndBufferedImage all = new SizeAndBufferedImage(size, null);

            int readerMinIndex = reader.getMinIndex();
            ImageReadParam param = reader.getDefaultReadParam();
            Iterator<ImageTypeSpecifier> imageTypes = reader.getImageTypes(0);
            while (imageTypes.hasNext()) {
                try {
                    ImageTypeSpecifier imageTypeSpecifier = imageTypes.next();
                    int bufferedImageType = imageTypeSpecifier.getBufferedImageType();
                    if (bufferedImageType == BufferedImage.TYPE_BYTE_GRAY) {
                        param.setDestinationType(imageTypeSpecifier);
                    }
                    all.setImage(reader.read(readerMinIndex, param));
                    return all;
                } catch (IllegalArgumentException e) {
                    log.warn(e.getMessage(), e);
                }
            }
        } catch (IOException e) {
            log.error(e.getMessage(), e);
        } finally {
            reader.dispose();
        }
    } else {
        log.error("No reader found for given format: " + suffix, null);
    }
    return null;
}

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From source file:org.onehippo.forge.gallerymagick.core.command.ScalrProcessorUtils.java

/**
 * Detects the {@code sourceFile} and returns the size dimension from it.
 * @param sourceFile source image file// w w  w.j  ava2s.  c om
 * @return Detects the {@code sourceFile} and returns the size dimension from it
 * @throws IOException if IO exception occurs
 */
public static ImageDimension identifyDimension(File sourceFile) throws IOException {
    ImageDimension dimension = null;
    String extension = FilenameUtils.getExtension(sourceFile.getName());
    Iterator<ImageReader> it = ImageIO.getImageReadersBySuffix(extension);

    if (!it.hasNext()) {
        throw new IllegalArgumentException("Unsupported file name extension: " + sourceFile);
    }

    ImageReader reader = null;

    try {
        reader = getImageReader(sourceFile);
        int width = reader.getWidth(reader.getMinIndex());
        int height = reader.getHeight(reader.getMinIndex());
        dimension = ImageDimension.from(width, height);
    } finally {
        if (reader != null) {
            reader.dispose();
        }
    }

    return dimension;
}

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From source file:org.onehippo.forge.gallerymagick.core.command.ScalrProcessorUtils.java

/**
 * Creates and returns an {@link ImageReader} instance from the {@code sourceFile}.
 * @param sourceFile source file//from   w  ww .j ava2  s . c o  m
 * @return an {@link ImageReader} instance
 * @throws IOException if IOException occurs
 */
private static ImageReader getImageReader(File sourceFile) throws IOException {
    ImageReader reader = null;
    String extension = FilenameUtils.getExtension(sourceFile.getName());
    Iterator<ImageReader> it = ImageIO.getImageReadersBySuffix(extension);

    if (it.hasNext()) {
        reader = it.next();
        ImageInputStream input = new FileImageInputStream(sourceFile);
        reader.setInput(input);
    }

    return reader;
}

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From source file:org.paxle.gui.impl.MenuManager.java

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse response)
        throws ServletException, IOException {
    if (req.getParameter("icon") != null) {
        String iconURL = req.getParameter("icon");
        BufferedImage img = null;

        String fileSuffix = null;
        int idx = iconURL.lastIndexOf(".");
        if (idx != -1)
            fileSuffix = iconURL.substring(idx + 1);
        if (fileSuffix != null) {
            Iterator<ImageReader> readers = ImageIO.getImageReadersBySuffix(fileSuffix);
            while (readers.hasNext() && img == null) {
                ImageReader reader = readers.next();

                InputStream input = null;
                try {
                    input = new URL(iconURL).openStream();
                    reader.setInput(ImageIO.createImageInputStream(input));
                    img = reader.read(0);
                } catch (Exception e) {
                    this.log("Unable to read image from " + iconURL, e);
                } finally {
                    if (input != null)
                        input.close();//from www .jav a2  s.  c om
                }
            }
        } else {
            img = ImageIO.read(new URL(iconURL));
        }

        if (img != null) {
            response.setHeader("Content-Type", "image/png");
            ImageIO.write(img, "png", response.getOutputStream());
        } else {
            response.sendError(404);
        }
    }
}

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From source file:org.photovault.image.ImageIOImage.java

/**
 * Get a proper image reader for a file based on file name extension.
 * @param f The file/* w w  w. j  av  a  2 s.  c  o m*/
 * @return Correct Reader or <CODE>null</CODE> if no proper reader is found.
 */
static private ImageReader getImageReader(File f) {
    ImageReader ret = null;
    if (f != null) {
        String fname = f.getName();
        int lastDotPos = fname.lastIndexOf(".");
        if (lastDotPos > 0 && lastDotPos < fname.length() - 1) {
            String suffix = fname.substring(lastDotPos + 1);
            Iterator readers = ImageIO.getImageReadersBySuffix(suffix);
            if (readers.hasNext()) {
                ret = (ImageReader) readers.next();
            }
        }
    }
    return ret;
}

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

/**
 *     Opens the image file specified by fname & dirname properties, read
 *     the rest of fields from that and create the instances
 * @param f File from which to read the information
 * @throws org.photovault.common.PhotovaultException If the file is not of recognized type
 * @throws IOException if the image cannot be read.
 *///from  w  ww. java  2s  .  c om
protected void readImageFile(File f) throws PhotovaultException, IOException {

    String fname = f.getName();
    int lastDotPos = fname.lastIndexOf(".");
    if (lastDotPos <= 0 || lastDotPos >= fname.length() - 1) {
        throw new PhotovaultException("Cannot determine file type extension of " + f.getAbsolutePath());
    }
    String suffix = fname.substring(lastDotPos + 1);
    Iterator readers = ImageIO.getImageReadersBySuffix(suffix);
    if (readers.hasNext()) {
        ImageReader reader = (ImageReader) readers.next();
        ImageInputStream iis = null;
        try {
            iis = ImageIO.createImageInputStream(f);
            if (iis != null) {
                reader.setInput(iis, true);
                // int imageCount = reader.getNumImages( true );
                // for now...
                int imageCount = 1;
                for (int n = 0; n < imageCount; n++) {
                    ImageDescriptorBase img = new OriginalImageDescriptor(this, "image#" + n);
                    img.setWidth(reader.getWidth(n));
                    img.setHeight(reader.getHeight(n));
                    // img.setInstanceType( ImageInstance.INSTANCE_TYPE_ORIGINAL );
                    img.setFile(this);
                }
                reader.dispose();
            }
        } catch (IOException ex) {
            log.debug("Exception in readImageFile: " + ex.getMessage());
            throw ex;
        } finally {
            if (iis != null) {
                try {
                    iis.close();
                } catch (IOException ex) {
                    log.warn("Cannot close image stream: " + ex.getMessage());
                }
            }
        }
    } else {
        RawImage ri = new RawImage(f);
        if (ri.isValidRawFile()) {
            // PlanarImage img = ri.getCorrectedImage();
            ImageDescriptorBase img = new OriginalImageDescriptor(this, "image#0");
            img.setWidth(ri.getWidth());
            img.setHeight(ri.getHeight());
        } else {
            throw new PhotovaultException(
                    "Unknown image file extension " + suffix + "\nwhile reading " + f.getAbsolutePath());
        }
    }

}

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