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

The following examples show how to use javax.imageio.ImageIO#getImageWriter() . These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
public static void testFormat(String format) {
    ImageReader reader =
        ImageIO.getImageReadersByFormatName(format).next();
    if (reader == null) {
        throw new RuntimeException("Failed to get reader for " + format);
    }

    ImageReaderSpi readerSpi = reader.getOriginatingProvider();
    System.out.println(format + " Reader SPI: " + readerSpi);

    String writerSpiNames[] = readerSpi.getImageWriterSpiNames();
    if (writerSpiNames == null || writerSpiNames.length == 0) {
        throw new RuntimeException("Failed to get writer spi names for " +
                                   format);
    }

    System.out.println("Available writer spi names:");
    for (int i = 0; i < writerSpiNames.length; i++) {
        System.out.println(writerSpiNames[i]);
        try {
            Class spiClass = Class.forName(writerSpiNames[i]);
            if (spiClass == null) {
                throw new RuntimeException("Failed to get spi class " +
                                           writerSpiNames[i]);
            }
            System.out.println("Got class " + spiClass.getName());

            Object spiObject = spiClass.newInstance();
            if (spiObject == null) {
                throw new RuntimeException("Failed to instantiate spi " +
                                           writerSpiNames[i]);
            }
            System.out.println("Got instance " + spiObject);
        } catch (Throwable e) {
            throw new RuntimeException("Failed to test spi " +
                                       writerSpiNames[i]);
        }
    }

    ImageWriter writer = ImageIO.getImageWriter(reader);
    if (writer == null) {
        throw new RuntimeException("Failed to get writer for " + format);
    }
}
 
Example 2
public static void testFormat(String format) {
    ImageReader reader =
        ImageIO.getImageReadersByFormatName(format).next();
    if (reader == null) {
        throw new RuntimeException("Failed to get reader for " + format);
    }

    ImageReaderSpi readerSpi = reader.getOriginatingProvider();
    System.out.println(format + " Reader SPI: " + readerSpi);

    String writerSpiNames[] = readerSpi.getImageWriterSpiNames();
    if (writerSpiNames == null || writerSpiNames.length == 0) {
        throw new RuntimeException("Failed to get writer spi names for " +
                                   format);
    }

    System.out.println("Available writer spi names:");
    for (int i = 0; i < writerSpiNames.length; i++) {
        System.out.println(writerSpiNames[i]);
        try {
            Class spiClass = Class.forName(writerSpiNames[i]);
            if (spiClass == null) {
                throw new RuntimeException("Failed to get spi class " +
                                           writerSpiNames[i]);
            }
            System.out.println("Got class " + spiClass.getName());

            Object spiObject = spiClass.newInstance();
            if (spiObject == null) {
                throw new RuntimeException("Failed to instantiate spi " +
                                           writerSpiNames[i]);
            }
            System.out.println("Got instance " + spiObject);
        } catch (Throwable e) {
            throw new RuntimeException("Failed to test spi " +
                                       writerSpiNames[i]);
        }
    }

    ImageWriter writer = ImageIO.getImageWriter(reader);
    if (writer == null) {
        throw new RuntimeException("Failed to get writer for " + format);
    }
}
 
Example 3
Source Project: ChatGameFontificator   File: AnimatedGifUtil.java    License: The Unlicense 4 votes vote down vote up
/**
 * Fix (ditto) for Java's animated GIF interpretation
 * 
 * Adapted from http://stackoverflow.com/questions/26801433/fix-frame-rate-of-animated-gif-in-java#answer-26829534
 * 
 * @param url
 *            The URL for the animated GIF to be loaded
 * @param dim
 *            The dimension object to be filled by the width and height of the loaded animated GIF
 * @return The loaded animated GIF
 * @throws Exception
 */
public static Image loadDittoAnimatedGif(final URL url, Dimension dim)
{
    final Image dimImage = new ImageIcon(url).getImage();

    Image image = null;
    try
    {
        ImageReader gifReader = ImageIO.getImageReadersByFormatName(GIF_EXTENSION).next();
        InputStream imageStream = url.openStream();
        gifReader.setInput(ImageIO.createImageInputStream(imageStream));
        IIOMetadata imageMetaData = gifReader.getImageMetadata(0);
        String metaFormatName = imageMetaData.getNativeMetadataFormatName();
        final int frameCount = gifReader.getNumImages(true);

        ByteArrayOutputStream baoStream = new ByteArrayOutputStream();
        ImageOutputStream ios = ImageIO.createImageOutputStream(baoStream);
        ImageWriter writer = ImageIO.getImageWriter(gifReader);
        writer.setOutput(ios);
        writer.prepareWriteSequence(null);

        final int imgWidth = dimImage.getWidth(null);
        final int imgHeight = dimImage.getHeight(null);
        dim.setSize(imgWidth, imgHeight);

        for (int i = 0; i < frameCount; i++)
        {
            // This read method takes into account the frame's top and left coordinates
            BufferedImage frame = gifReader.read(i);
            IIOMetadataNode nodes = (IIOMetadataNode) gifReader.getImageMetadata(i).getAsTree(metaFormatName);

            for (int j = 0; j < nodes.getLength(); j++)
            {
                IIOMetadataNode node = (IIOMetadataNode) nodes.item(j);
                if (GRAPHIC_CTRL_EXT.equalsIgnoreCase(node.getNodeName()))
                {
                    int delay = Integer.parseInt(node.getAttribute(ATTRIBUTE_DELAY_TIME));
                    // Minimum delay for browsers, which delay animated GIFs much more than would be to spec
                    if (delay < MIN_ANI_GIF_DELAY)
                    {
                        node.setAttribute(ATTRIBUTE_DELAY_TIME, Integer.toString(MIN_ANI_GIF_DELAY));
                    }
                    // Java's interpretation of restore to previous doesn't seem to work correctly, 
                    // at least not for BTTV's (ditto)
                    if (node.getAttribute(ATTRIBUTE_DISPOSAL_METHOD).equals(DISPOSE_RESTORE_TO_PREVIOUS))
                    {
                        node.setAttribute(ATTRIBUTE_DISPOSAL_METHOD, DISPOSE_RESTORE_TO_BGCOLOR);
                    }
                }
            }

            IIOMetadata metadata = writer.getDefaultImageMetadata(new ImageTypeSpecifier(frame), null);
            metadata.setFromTree(metadata.getNativeMetadataFormatName(), nodes);

            // This modified frame is necessary to get the correct image placement, width, and height in the final GIF
            BufferedImage frameMod = new BufferedImage(imgWidth, imgHeight, BufferedImage.TYPE_INT_ARGB);
            Graphics big = frameMod.getGraphics();
            big.drawImage(frame, 0, 0, null);

            IIOImage fixedFrame = new IIOImage(frameMod, null, metadata);
            writer.writeToSequence(fixedFrame, writer.getDefaultWriteParam());
        }
        writer.endWriteSequence();

        if (ios != null)
        {
            ios.close();
        }

        image = Toolkit.getDefaultToolkit().createImage(baoStream.toByteArray());
    }
    catch (Exception e)
    {
        // If anything goes wrong, just load it normally
        logger.error("Error loading animated GIF (ditto) from " + url, e);
        image = new ImageIcon(url).getImage();
        dim.setSize(image.getWidth(null), image.getHeight(null));
    }

    return image;
}