Examples with ImageReader javax.imageio.ImageReader used on opensource projects

Example 26 with ImageReader

use of javax.imageio.ImageReader in project poi by apache.

the class ImageUtils method getImageDimension.

/**
     * Return the dimension of this image
     *
     * @param is the stream containing the image data
     * @param type type of the picture: {@link org.apache.poi.ss.usermodel.Workbook#PICTURE_TYPE_JPEG},
     * {@link org.apache.poi.ss.usermodel.Workbook#PICTURE_TYPE_PNG} or {@link org.apache.poi.ss.usermodel.Workbook#PICTURE_TYPE_DIB}
     *
     * @return image dimension in pixels
     */
public static Dimension getImageDimension(InputStream is, int type) {
    Dimension size = new Dimension();
    switch(type) {
        //other formats like WMF, EMF and PICT are not supported in Java
        case Workbook.PICTURE_TYPE_JPEG:
        case Workbook.PICTURE_TYPE_PNG:
        case Workbook.PICTURE_TYPE_DIB:
            try {
                //read the image using javax.imageio.*
                ImageInputStream iis = ImageIO.createImageInputStream(is);
                try {
                    Iterator<ImageReader> i = ImageIO.getImageReaders(iis);
                    ImageReader r = i.next();
                    try {
                        r.setInput(iis);
                        BufferedImage img = r.read(0);
                        int[] dpi = getResolution(r);
                        //since cannot divide by zero
                        if (dpi[0] == 0)
                            dpi[0] = PIXEL_DPI;
                        if (dpi[1] == 0)
                            dpi[1] = PIXEL_DPI;
                        size.width = img.getWidth() * PIXEL_DPI / dpi[0];
                        size.height = img.getHeight() * PIXEL_DPI / dpi[1];
                    } finally {
                        r.dispose();
                    }
                } finally {
                    iis.close();
                }
            } catch (IOException e) {
                //silently return if ImageIO failed to read the image
                logger.log(POILogger.WARN, e);
            }
            break;
        default:
            logger.log(POILogger.WARN, "Only JPEG, PNG and DIB pictures can be automatically sized");
    }
    return size;
}

Example 27 with ImageReader

use of javax.imageio.ImageReader in project ChatGameFontificator by GlitchCog.

the class AnimatedGifUtil method loadDittoAnimatedGif.

/**
     * 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));
                    }
                    // 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;
}

Example 28 with ImageReader

use of javax.imageio.ImageReader in project android by JetBrains.

the class ConvertToWebpAction method isEligibleForConversion.

public static boolean isEligibleForConversion(@Nullable VirtualFile file, @Nullable WebpConversionSettings settings) {
    if (file != null && !file.isDirectory()) {
        String name = file.getName();
        if (name.endsWith(DOT_PNG)) {
            if (settings != null && settings.skipNinePatches && endsWithIgnoreCase(name, DOT_9PNG)) {
                return false;
            }
            if (settings != null && settings.skipTransparentImages) {
                try {
                    BufferedImage image = ImageIO.read(file.getInputStream());
                    if (image != null && ImageUtils.isNonOpaque(image)) {
                        return false;
                    }
                } catch (IOException ignore) {
                }
            }
            return true;
        }
        if (endsWithIgnoreCase(name, DOT_JPG) || SdkUtils.endsWith(name, DOT_JPEG)) {
            return true;
        }
        if (endsWithIgnoreCase(name, DOT_BMP)) {
            // Really?
            return true;
        }
        if (endsWithIgnoreCase(name, DOT_GIF)) {
            // Can convert only if not an animated gif (TODO: Support animated webp!)
            ImageReader is = ImageIO.getImageReadersBySuffix("GIF").next();
            ImageInputStream iis;
            try {
                iis = ImageIO.createImageInputStream(file.getInputStream());
                is.setInput(iis);
                return is.getNumImages(true) == 1;
            } catch (IOException ignore) {
                return false;
            }
        }
    }
    return false;
}

Example 29 with ImageReader

use of javax.imageio.ImageReader in project dropbox-sdk-java by dropbox.

the class DbxClientV1IT method testThumbnail.

@Test
public void testThumbnail() throws Exception {
    String orig = p("test-imag" + E_ACCENT + ".jpeg");
    // Upload an image.
    InputStream in = this.getClass().getResourceAsStream("/test-image.jpeg");
    if (in == null) {
        throw new AssertionError("couldn't load test image \"test-image.jpeg\"");
    }
    DbxEntry.File origMD;
    try {
        origMD = client.uploadFile(orig, DbxWriteMode.add(), -1, in);
    } finally {
        IOUtil.closeInput(in);
    }
    BufferedImage origImage = ImageIO.read(getClass().getResource("/test-image.jpeg"));
    int origW = origImage.getWidth();
    int origH = origImage.getHeight();
    DbxThumbnailFormat[] formats = { DbxThumbnailFormat.JPEG, DbxThumbnailFormat.PNG };
    DbxThumbnailSize[] sizes = { DbxThumbnailSize.w32h32, DbxThumbnailSize.w64h64, DbxThumbnailSize.w64h64, DbxThumbnailSize.w640h480, DbxThumbnailSize.w1024h768 };
    for (DbxThumbnailFormat format : formats) {
        long prevSize = 0;
        ImageReader reader = getImageReaderForFormat(format);
        for (DbxThumbnailSize size : sizes) {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            DbxEntry.File md = client.getThumbnail(size, format, orig, null, out);
            byte[] data = out.toByteArray();
            assertEquals(removeMediaInfo(origMD), removeMediaInfo(md));
            // We're getting bigger and bigger thumbnails, so they should have more bytes
            // than the previous ones.
            assertTrue(data.length > prevSize);
            reader.setInput(new MemoryCacheImageInputStream(new ByteArrayInputStream(data)));
            int w = reader.getWidth(0);
            int h = reader.getHeight(0);
            int expectedW = Math.min(size.width, origW);
            int expectedH = Math.min(size.width, origH);
            assertTrue((w == expectedW && h <= expectedH) || (h == expectedH && w <= expectedW), "expected = " + expectedW + "x" + expectedH + ", got = " + w + "x" + h);
        }
    }
}

Example 30 with ImageReader

use of javax.imageio.ImageReader in project dropbox-sdk-java by dropbox.

the class DbxClientV1IT method getImageReaderForFormat.

private static ImageReader getImageReaderForFormat(DbxThumbnailFormat format) {
    Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(format.ident);
    if (!readers.hasNext()) {
        throw new AssertionError("no ImageReader for " + jq(format.ident));
    }
    ImageReader reader = readers.next();
    if (readers.hasNext()) {
        throw new AssertionError("multiple ImageReaders for " + jq(format.ident));
    }
    return reader;
}