Examples with FileOpException digilib.io.FileOpException used on opensource projects

Example 16 with FileOpException

use of digilib.io.FileOpException in project digilib by robcast.

the class ImageLoaderDocuImage method getReader.

/**
 * Get an ImageReader for the image file.
 *
 * @return
 */
public ImageReader getReader(ImageInput input) throws IOException {
    logger.debug("get ImageReader for " + input);
    if (reuseReader && reader != null) {
        logger.debug("reuseing ImageReader");
        return reader;
    }
    ImageInputStream istream = null;
    if (input.hasImageInputStream()) {
        // ImageInputStream input
        istream = input.getImageInputStream();
    } else if (input.hasFile()) {
        // file only input
        RandomAccessFile rf = new RandomAccessFile(input.getFile(), "r");
        istream = new FileImageInputStream(rf);
    } else {
        throw new FileOpException("Unable to get data from ImageInput");
    }
    Iterator<ImageReader> readers;
    String mt = null;
    if (input.hasMimetype()) {
        // check hasMimetype first or we might get into a loop
        mt = input.getMimetype();
    } else {
        // try file extension
        mt = FileOps.mimeForFile(input.getFile());
    }
    if (mt == null) {
        logger.debug("No mime-type. Trying automagic.");
        readers = ImageIO.getImageReaders(istream);
    } else {
        logger.debug("File type:" + mt);
        readers = ImageIO.getImageReadersByMIMEType(mt);
    }
    if (!readers.hasNext()) {
        throw new FileOpException("Can't find Reader to load File!");
    }
    ImageReader reader = readers.next();
    if (reader == null) {
        throw new FileOpException("Error getting Reader to load File!");
    }
    logger.debug("ImageIO: this reader: " + reader.getClass());
    /*
        while (readers.hasNext()) { 
        	logger.debug("ImageIO: next reader: " + readers.next().getClass()); 
        }
        */
    reader.setInput(istream);
    return reader;
}

Example 17 with FileOpException

use of digilib.io.FileOpException in project digilib by robcast.

the class ImageLoaderDocuImage method loadSubimage.

/* 
     * Load an image file into the Object.
     * 
     * @see digilib.image.DocuImageImpl#loadSubimage(digilib.io.ImageInput, java.awt.Rectangle, int)
     */
public void loadSubimage(ImageInput ii, Rectangle region, int prescale) throws FileOpException {
    logger.debug("loadSubimage");
    this.input = ii;
    // ImageReader reader = null;
    try {
        reader = getReader(ii);
        /*
             * set up reader parameters
             */
        ImageReadParam readParam = reader.getDefaultReadParam();
        readParam.setSourceRegion(region);
        if (prescale > 1) {
            readParam.setSourceSubsampling(prescale, prescale, 0, 0);
        }
        if (imageHacks.get(Hacks.setDestSrgb)) {
            /*
				 * try to set target color space to sRGB
				 */
            for (Iterator<ImageTypeSpecifier> i = reader.getImageTypes(0); i.hasNext(); ) {
                ImageTypeSpecifier type = (ImageTypeSpecifier) i.next();
                ColorModel cm = type.getColorModel();
                ColorSpace cs = cm.getColorSpace();
                logger.debug("loadSubimage: possible color model:" + cm + " color space:" + cs);
                if (cs.getNumComponents() < 3 && !imageHacks.get(Hacks.setDestSrgbForNonRgb)) {
                    // if the first type is not RGB do nothing
                    logger.debug("loadSubimage: image is not RGB " + type);
                    break;
                }
                if (cs.isCS_sRGB()) {
                    logger.debug("loadSubimage: substituted sRGB destination type " + type);
                    readParam.setDestinationType(type);
                    break;
                }
            }
        }
        /*
             * read image
             */
        logger.debug("loadSubimage: loading..");
        img = reader.read(0, readParam);
        logger.debug("loadSubimage: loaded " + img);
        // invalidate image size if it was set
        imageSize = null;
        /*
             * downconvert highcolor images
             */
        if (img.getColorModel().getComponentSize(0) > 8) {
            logger.debug("loadSubimage: converting to 8bit");
            int type = BufferedImage.TYPE_INT_RGB;
            if (img.getColorModel().hasAlpha()) {
                type = BufferedImage.TYPE_INT_ARGB;
            }
            BufferedImage lcImg = new BufferedImage(img.getWidth(), img.getHeight(), type);
            lcImg.createGraphics().drawImage(img, null, 0, 0);
            img = lcImg;
        }
    } catch (IOException e) {
        throw new FileOpException("Unable to load File!", e);
    } finally {
        if (!reuseReader && reader != null) {
            reader.dispose();
        }
    }
}

Example 18 with FileOpException

use of digilib.io.FileOpException in project digilib by robcast.

the class ImageLoaderDocuImage method loadImage.

/* 
     * load image file
     * @see digilib.image.DocuImageImpl#loadImage(digilib.io.ImageInput)
     */
public void loadImage(ImageInput ii) throws FileOpException {
    logger.debug("loadImage: " + ii);
    this.input = ii;
    try {
        if (ii.hasImageInputStream()) {
            img = ImageIO.read(ii.getImageInputStream());
        } else if (ii.hasFile()) {
            img = ImageIO.read(ii.getFile());
        }
    } catch (IOException e) {
        throw new FileOpException("Error reading image!", e);
    }
    if (img == null) {
        throw new FileOpException("Unable to read image!");
    }
}