Mega Code Archive
Crop Image
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// Ahy - A pure java CMS.
// Copyright (C) 2010 Sidney Leal (manish.com.br)
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//package br.com.manish.ahy.kernel.util;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.imageio.ImageIO;
public final class ImageUtil {
public static ByteArrayOutputStream crop(ByteArrayInputStream bais, int width, int height) throws IOException {
BufferedImage src = ImageIO.read(bais);
BufferedImage clipping = crop(src, width, height);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(clipping,"JPG", baos);
return baos;
}
public static BufferedImage crop(BufferedImage src, int width, int height) throws IOException {
int x = src.getWidth()/2 - width/2;
int y = src.getHeight()/2 - height/2;
// System.out.println("---" + src.getWidth() + " - " + src.getHeight() + " - " + x + " - " + y);
BufferedImage clipping = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);//src.getType());
Graphics2D area = (Graphics2D) clipping.getGraphics().create();
area.drawImage(src, 0, 0, clipping.getWidth(), clipping.getHeight(), x, y, x + clipping.getWidth(),
y + clipping.getHeight(), null);
area.dispose();
return clipping;
}
public static ByteArrayOutputStream smartCrop(ByteArrayInputStream bais, int width, int height) throws IOException {
BufferedImage src = ImageIO.read(bais);
Float scale;
if (src.getWidth() > src.getHeight()) {
scale = Float.valueOf(height) / Float.valueOf(src.getHeight());
if (src.getWidth() * scale < width) {
scale = Float.valueOf(width) / Float.valueOf(src.getWidth());
}
} else {
scale = Float.valueOf(width) / Float.valueOf(src.getWidth());
if (src.getHeight() * scale < height) {
scale = Float.valueOf(height) / Float.valueOf(src.getHeight());
}
}
//
// System.out.println("--- " + src.getWidth() + " - " + width);
// System.out.println("--- " + src.getHeight() + " - " + height);
// System.out.println("--- " + scale + " -- " + Float.valueOf(src.getWidth() * scale).intValue() + " -- " + Float.valueOf(src.getHeight() * scale).intValue());
//
BufferedImage temp = scale(src, Float.valueOf(src.getWidth() * scale).intValue(),
Float.valueOf(src.getHeight() * scale).intValue());
temp = crop(temp, width, height);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(temp,"JPG", baos);
return baos;
}
public static ByteArrayOutputStream scale(ByteArrayInputStream bais, int width, int height) throws IOException {
BufferedImage src = ImageIO.read(bais);
BufferedImage dest = scale(src, width, height);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(dest,"JPG", baos);
return baos;
}
public static BufferedImage scale(BufferedImage src, int width, int height) throws IOException {
BufferedImage dest = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = dest.createGraphics();
AffineTransform at = AffineTransform.getScaleInstance(
(double)width/src.getWidth(),
(double)height/src.getHeight());
g.drawRenderedImage(src,at);
return dest;
}
}
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