Java Code Examples for javax.imageio.ImageIO#getImageReadersBySuffix()

@Override
public String preferredOutputFormatName()
{
	String fileExtension = getExtension(destinationFile);

	if (fileExtension != null)
	{
		Iterator<ImageReader> rIter = ImageIO.getImageReadersBySuffix(fileExtension);
		
		if (rIter.hasNext())
		{
			try
			{
				return rIter.next().getFormatName();
			}
			catch (IOException e)
			{
				return ThumbnailParameter.ORIGINAL_FORMAT;
			}
		}
	}
	
	return outputFormat;
}
 

public static Dimension getImageDimension(File imgFile) throws IOException {
    int pos = imgFile.getName().lastIndexOf(".");
    if (pos == -1)
        throw new IOException("No extension for file: " + imgFile.getAbsolutePath());
    String suffix = imgFile.getName().substring(pos + 1);
    Iterator<ImageReader> iter = ImageIO.getImageReadersBySuffix(suffix);
    while(iter.hasNext()) {
        ImageReader reader = iter.next();
        try {
            ImageInputStream stream = new FileImageInputStream(imgFile);
            reader.setInput(stream);
            int width = reader.getWidth(reader.getMinIndex());
            int height = reader.getHeight(reader.getMinIndex());
            return new Dimension(width, height);
        } catch (IOException e) {
            System.out.println("Error reading: " + imgFile.getAbsolutePath() + " " + e);
        } finally {
            reader.dispose();
        }
    }

    throw new IOException("Not a known image file: " + imgFile.getAbsolutePath());
}
 

/**
 * Gets image dimensions for given file
 * 
 * @param imgFile image file
 * @return dimensions of image
 * @throws IOException if the file is not a known image
 */
public static Dimension getImageDimension(File imgFile) throws IOException {
	int pos = imgFile.getName().lastIndexOf(".");
	if (pos == -1)
		throw new IOException("No extension for file: " + imgFile.getAbsolutePath());
	String suffix = imgFile.getName().substring(pos + 1);
	Iterator<ImageReader> iter = ImageIO.getImageReadersBySuffix(suffix);
	while (iter.hasNext()) {
		ImageReader reader = iter.next();
		try {
			ImageInputStream stream = new FileImageInputStream(imgFile);
			reader.setInput(stream);
			int width = reader.getWidth(reader.getMinIndex());
			int height = reader.getHeight(reader.getMinIndex());
			return new Dimension(width, height);
		} catch (IOException e) {
			log.warn("Error reading: " + imgFile.getAbsolutePath(), e);
		} finally {
			reader.dispose();
		}
	}

	throw new IOException("Not a known image file: " + imgFile.getAbsolutePath());
}
 

/**
 * Gets image dimensions for given file
 *
 * @param imgFile image file
 * @return dimensions of image
 * @throws IOException if the file is not a known image
 */
public static Dimension getImageDimension(File imgFile) throws IOException {
    int pos = imgFile.getName().lastIndexOf(".");
    if (pos == -1)
        throw new IOException("No extension for file: " + imgFile.getAbsolutePath());
    String suffix = imgFile.getName().substring(pos + 1);
    Iterator<ImageReader> iter = ImageIO.getImageReadersBySuffix(suffix);
    if (iter.hasNext()) {
        ImageReader reader = iter.next();
        try {
            ImageInputStream stream = new FileImageInputStream(imgFile);
            reader.setInput(stream);
            int width = reader.getWidth(reader.getMinIndex());
            int height = reader.getHeight(reader.getMinIndex());
            return new Dimension(width, height);
        } finally {
            reader.dispose();
        }
    }

    throw new IOException("Not a known image file: " + imgFile.getAbsolutePath());
}
 

public static boolean doesImageFitBox(FileHandle fileHandle, float width, float height) {
    boolean result = false;
    String suffix = fileHandle.extension();
    Iterator<ImageReader> iter = ImageIO.getImageReadersBySuffix(suffix);
    if (iter.hasNext()) {
        ImageReader reader = iter.next();
        try (var stream = new FileImageInputStream(fileHandle.file())) {
            reader.setInput(stream);
            int imageWidth = reader.getWidth(reader.getMinIndex());
            int imageHeight = reader.getHeight(reader.getMinIndex());
            result = imageWidth < width && imageHeight < height;
        } catch (IOException e) {
            Gdx.app.error(Utils.class.getName(), "error checking image dimensions", e);
        } finally {
            reader.dispose();
        }
    } else {
        Gdx.app.error(Utils.class.getName(), "No reader available to check image dimensions");
    }
    return result;
}
 

private static Dimension getImageDimension(File imgFile) throws IOException {
    int pos = imgFile.getName().lastIndexOf(".");
    if (pos == -1)
        throw new IOException("No extension for file: " + imgFile.getAbsolutePath());
    String suffix = imgFile.getName().substring(pos + 1);
    Iterator<ImageReader> iter = ImageIO.getImageReadersBySuffix(suffix);
    while (iter.hasNext()) {
        ImageReader reader = iter.next();
        try {
            ImageInputStream stream = new FileImageInputStream(imgFile);
            reader.setInput(stream);
            int width = reader.getWidth(reader.getMinIndex());
            int height = reader.getHeight(reader.getMinIndex());
            return new Dimension(width, height);
        } catch (IOException e) {
            LOG.log(Level.WARNING, "Error reading: " + imgFile.getAbsolutePath(), e);
        } finally {
            reader.dispose();
        }
    }

    throw new IOException("Not a known image file: " + imgFile.getAbsolutePath());
}
 

@Override
public Object load(AssetInfo info) throws IOException {
    if (ImageIO.getImageReadersBySuffix(info.getKey().getExtension()) != null){
        boolean flip = ((TextureKey) info.getKey()).isFlipY();
        InputStream in = null;
        try {
            in = info.openStream();
            Image img = load(in, flip);
            if (img == null){
                throw new AssetLoadException("The given image cannot be loaded " + info.getKey());
            }
            return img;
        } finally {
            if (in != null){
                in.close();
            }
        }
    }else{
        throw new AssetLoadException("The extension " + info.getKey().getExtension() + " is not supported");
    }
}
 

private java.awt.Dimension getImageSize(File image) throws IOException {
    String filename = image.getName();
    int p = filename.lastIndexOf('.');
    if (p == -1) {
        return null;
    }
    String suffix = filename.substring(p + 1).toLowerCase();
    Iterator<ImageReader> readers = ImageIO.getImageReadersBySuffix(suffix);
    if (readers.hasNext()) {
        ImageReader reader = readers.next();
        try {
            try (ImageInputStream in = new FileImageInputStream(image)) {
                reader.setInput(in);
                int width = reader.getWidth(reader.getMinIndex());
                int height = reader.getHeight(reader.getMinIndex());
                return new java.awt.Dimension(width, height);
            }
        } finally {
            reader.dispose();
        }
    } else {
        return null;
    }
}
 

private static void testGetReaderFileSuffixes() {
    String[] suffixes = ImageIO.getReaderFileSuffixes();
    for (String s : suffixes) {
        Iterator<ImageReader> it = ImageIO.getImageReadersBySuffix(s);
        if (!it.hasNext()) {
            throw new RuntimeException("getReaderFileSuffixes returned " +
                                       "an unknown suffix: " + s);
        }
    }
}
 

public static void main(String args[]) throws Exception {
    Iterator<ImageReader> readers = ImageIO.getImageReadersBySuffix("simp");
    ImageReader simpReader = null;
    if (readers.hasNext()) {
        simpReader = readers.next();
        System.out.println("reader="+simpReader);
    }
    if (simpReader == null) {
        throw new RuntimeException("Reader not found.");
    }

    ImageReaderSpi spi = simpReader.getOriginatingProvider();
    IIOMetadataFormat spiFmt =
        spi.getImageMetadataFormat("simp_metadata_1.0");
    System.out.println("fmt from SPI=" + spiFmt);

    ByteArrayInputStream bais = new ByteArrayInputStream(simpData);
    ImageInputStream iis = new MemoryCacheImageInputStream(bais);
    simpReader.setInput(iis);
    BufferedImage bi = simpReader.read(0);
    System.out.println(bi);
    IIOMetadata metadata = simpReader.getImageMetadata(0);
    System.out.println("Image metadata="+metadata);
    IIOMetadataFormat format =
        metadata.getMetadataFormat("simp_metadata_1.0");
    System.out.println("Image metadata format="+format);
    if (format == null) {
        throw new RuntimeException("MetadataFormat not found.");
    }
}
 

@Override
protected int[] getCollectDataParamLimits() {
	if (readers == null) {
		readers = new ArrayList<>();
		Iterator<ImageReader> iterator = ImageIO
				.getImageReadersBySuffix("jpeg");
		while (iterator.hasNext()) {
			ImageReader reader = iterator.next();
			readers.add(reader);
		}
	}
	return new int[] { SAMPLE_COUNT, 1 + 2 * readers.size() };
}
 

private static void testGetReaderFileSuffixes() {
    String[] suffixes = ImageIO.getReaderFileSuffixes();
    for (String s : suffixes) {
        Iterator<ImageReader> it = ImageIO.getImageReadersBySuffix(s);
        if (!it.hasNext()) {
            throw new RuntimeException("getReaderFileSuffixes returned " +
                                       "an unknown suffix: " + s);
        }
    }
}
 

@Override
public BufferedImage[] loadAsset( InputStream input, AssetInfo assetInfo ) throws Exception
{
	// Get the image reader...
	Iterator<ImageReader> iter = ImageIO.getImageReadersBySuffix( "gif" );

	// Check that there is one (this should almost never fail).
	if (!iter.hasNext())
	{
		throw new RuntimeException( "gif image reader not found" );
	}

	// Take the GIF reader
	ImageReader image = iter.next();

	// Set the input stream to which to read the GIF from.
	image.setInput( ImageIO.createImageInputStream( input ) );

	// Calculate the number of frames in the GIF image.
	int imgs = image.getNumImages( true );

	// Read each frame from the GIF image.
	BufferedImage[] frames = new BufferedImage[imgs];

	for (int i = 0; i < imgs; i++)
	{
		frames[i] = image.read( i );
	}

	return frames;
}