/*
* Copyright (c) 2009, 2010, 2011, 2012, B3log Team
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.b3log.latke.image.local;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.List;
import javax.imageio.ImageIO;
import org.b3log.latke.image.Image;
import org.b3log.latke.image.ImageService;
/**
* Image service.
*
* @author <a href="mailto:DL88250@gmail.com">Liang Ding</a>
* @version 1.0.0.0, Aug 16, 2011
*/
public final class LocalImageService implements ImageService {
@Override
public Image makeImage(final byte[] data) {
final Image ret = new Image();
ret.setData(data);
return ret;
}
@Override
public Image makeImage(final List<Image> images) {
if (null == images || images.isEmpty()) {
return null;
}
try {
final Image firstImage = images.get(0);
BufferedImage tmp = ImageIO.read(new ByteArrayInputStream(firstImage.getData()));
for (int i = 1; i < images.size(); i++) {
final Image image = images.get(i);
final byte[] data = image.getData();
final BufferedImage awtImage = ImageIO.read(new ByteArrayInputStream(data));
tmp = splice(tmp, awtImage);
}
final Image ret = new Image();
final ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ImageIO.write(tmp, "PNG", byteArrayOutputStream);
final byte[] data = byteArrayOutputStream.toByteArray();
ret.setData(data);
return ret;
} catch (final IOException e) {
throw new RuntimeException(e);
}
}
/**
* Splices the specified image1 and image2 horizontally.
*
* @param image1 the specified image1
* @param image2 the specified image2
* @return the spliced image
*/
private static BufferedImage splice(final java.awt.Image image1, final java.awt.Image image2) {
final int[][] size = {{image1.getWidth(null), image1.getHeight(null)},
{image2.getWidth(null), image2.getHeight(null)}};
final int width = size[0][0] + size[1][0];
final int height = Math.max(size[0][1], size[1][1]);
final BufferedImage ret = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
final Graphics2D g2 = ret.createGraphics();
g2.drawImage(image1, 0, 0, null);
g2.drawImage(image2, size[0][0], 0, null);
return ret;
}
}