Examples with FileImageInputStream javax.imageio.stream.FileImageInputStream used on opensource projects

Example 36 with FileImageInputStream

use of javax.imageio.stream.FileImageInputStream in project openolat by klemens.

the class ImageHelperImpl method scaleImage.

/**
 * @param image the image to scale
 * @param scaledImaged the new scaled image
 * @param maxSize the maximum size (height or width) of the new scaled image
 * @return
 */
@Override
public Size scaleImage(File image, String imageExt, VFSLeaf scaledImage, int maxWidth, int maxHeight) {
    ImageInputStream imageIns = null;
    OutputStream bos = new BufferedOutputStream(scaledImage.getOutputStream(false));
    try {
        imageIns = new FileImageInputStream(image);
        SizeAndBufferedImage scaledSize = calcScaledSize(imageIns, imageExt, maxWidth, maxHeight, false);
        if (scaledSize == null) {
            return null;
        }
        if (!scaledSize.getScaledSize().isChanged() && isSameFormat(image, scaledImage)) {
            InputStream cloneIns = new FileInputStream(image);
            IOUtils.copy(cloneIns, bos);
            IOUtils.closeQuietly(cloneIns);
            return scaledSize.getScaledSize();
        } else {
            BufferedImage imageSrc = scaledSize.getImage();
            if (imageSrc == null) {
                // unsupported image format
                return null;
            }
            BufferedImage scaledBufferedImage = scaleTo(imageSrc, scaledSize.getScaledSize());
            if (writeTo(scaledBufferedImage, bos, scaledSize.getScaledSize(), getImageFormat(scaledImage))) {
                return scaledSize.getScaledSize();
            }
            return null;
        }
    } catch (IOException e) {
        return null;
    } finally {
        closeQuietly(imageIns);
        FileUtils.closeSafely(bos);
    }
}