com.liferay.adaptive.media.image.internal.util.RenderedImageUtil.java Source code

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Here is the source code for com.liferay.adaptive.media.image.internal.util.RenderedImageUtil.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.adaptive.media.image.internal.util;

import com.liferay.adaptive.media.exception.AdaptiveMediaRuntimeException;
import com.liferay.portal.kernel.image.ImageToolUtil;
import com.liferay.portal.kernel.io.unsync.UnsyncByteArrayOutputStream;

import java.awt.image.RenderedImage;

import java.io.IOException;
import java.io.InputStream;

import java.util.Iterator;

import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;

/**
 * @author Adolfo Prez
 */
public class RenderedImageUtil {

    public static byte[] getRenderedImageContentStream(RenderedImage renderedImage, String mimeType)
            throws IOException {

        try (UnsyncByteArrayOutputStream baos = new UnsyncByteArrayOutputStream()) {

            ImageToolUtil.write(renderedImage, mimeType, baos);

            return baos.toByteArray();
        } catch (IOException ioe) {
            throw new AdaptiveMediaRuntimeException.IOException(ioe);
        }
    }

    public static RenderedImage readImage(InputStream inputStream) throws IOException {

        ImageInputStream imageInputStream = ImageIO.createImageInputStream(inputStream);

        Iterator<ImageReader> iterator = ImageIO.getImageReaders(imageInputStream);

        while (iterator.hasNext()) {
            ImageReader imageReader = null;

            try {
                imageReader = iterator.next();

                imageReader.setInput(imageInputStream);

                return imageReader.read(0);
            } catch (IOException ioe) {
                continue;
            } finally {
                if (imageReader != null) {
                    imageReader.dispose();
                }
            }
        }

        throw new IOException("Unsupported image type");
    }

}