Scale Image : Image « 2D Graphics GUI « Java






Scale Image

 

//  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 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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