Display image after operation : BufferedImage « 2D Graphics GUI « Java

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Java » 2D Graphics GUI » BufferedImageScreenshots 
Display image after operation
      

/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
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 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
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 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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 */

import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.awt.image.ByteLookupTable;
import java.awt.image.ConvolveOp;
import java.awt.image.Kernel;
import java.awt.image.LookupOp;
import java.awt.image.RescaleOp;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

import javax.imageio.ImageIO;
import javax.swing.JApplet;
import javax.swing.JComboBox;
import javax.swing.JFrame;

class ImageDrawingComponent extends Component {

  static String descs[] "Simple Copy""Scale Up""Scale Down",
      "Scale Up : Bicubic""Convolve : LowPass""Convolve : Sharpen",
      "RescaleOp""LookupOp"};

  int opIndex;
  private BufferedImage bi;
  int w, h;

  public static final float[] SHARPEN3x3 = // sharpening filter kernel
  0.f, -1.f0.f, -1.f5.f, -1.f0.f, -1.f0.f };

  public static final float[] BLUR3x3 = 0.1f0.1f0.1f// low-pass filter
                                                            // kernel
      0.1f0.2f0.1f0.1f0.1f0.1f };

  public ImageDrawingComponent(URL imageSrc) {
    try {
      bi = ImageIO.read(imageSrc);
      w = bi.getWidth(null);
      h = bi.getHeight(null);
      if (bi.getType() != BufferedImage.TYPE_INT_RGB) {
        BufferedImage bi2 = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
        Graphics big = bi2.getGraphics();
        big.drawImage(bi, 00null);
        bi = bi2;
      }
    catch (IOException e) {
      System.out.println("Image could not be read");
      System.exit(1);
    }
  }

  public Dimension getPreferredSize() {
    return new Dimension(w, h);
  }

  static String[] getDescriptions() {
    return descs;
  }

  void setOpIndex(int i) {
    opIndex = i;
  }

  /*
   * In this example the image is recalculated on the fly every time This makes
   * sense where repaints are infrequent or will use a different filter/op from
   * the last. In other cases it may make sense to "cache" the results of the
   * operation so that unless 'opIndex' changes, drawing is always a simple
   * copy. In such a case create the cached image and directly apply the filter
   * to it and retain the resulting image to be repainted. The resulting image
   * if untouched and unchanged Java 2D may potentially use hardware features to
   * accelerate the blit.
   */
  public void paint(Graphics g) {

    Graphics2D g2 = (Graphics2Dg;

    switch (opIndex) {
    case 0/* copy */
      g.drawImage(bi, 00null);
      break;

    case 1/* scale up using coordinates */
      g.drawImage(bi, 00, w, h, /* dst rectangle */
      00, w / 2, h / 2/* src area of image */
      null);
      break;

    case 2/* scale down using transform */
      g2.drawImage(bi, AffineTransform.getScaleInstance(0.70.7)null);
      break;

    case 3/* scale up using transform Op and BICUBIC interpolation */
      AffineTransform at = AffineTransform.getScaleInstance(1.51.5);
      AffineTransformOp aop = new AffineTransformOp(at,
          AffineTransformOp.TYPE_BICUBIC);
      g2.drawImage(bi, aop, 00);
      break;

    case 4/* low pass filter */
    case 5/* sharpen */
      float[] data = (opIndex == 4? BLUR3x3 : SHARPEN3x3;
      ConvolveOp cop = new ConvolveOp(new Kernel(33, data),
          ConvolveOp.EDGE_NO_OP, null);
      g2.drawImage(bi, cop, 00);
      break;

    case 6/* rescale */
      RescaleOp rop = new RescaleOp(1.1f20.0fnull);
      g2.drawImage(bi, rop, 00);
      break;

    case 7/* lookup */
      byte lut[] new byte[256];
      for (int j = 0; j < 256; j++) {
        lut[j(byte) (256 - j);
      }
      ByteLookupTable blut = new ByteLookupTable(0, lut);
      LookupOp lop = new LookupOp(blut, null);
      g2.drawImage(bi, lop, 00);
      break;

    default:
    }
  }
}

public class ImageDrawingApplet extends JApplet {

  static String imageFileName = "bld.jpg";
  private URL imageSrc;

  public ImageDrawingApplet() {
  }

  public ImageDrawingApplet(URL imageSrc) {
    this.imageSrc = imageSrc;
  }

  public void init() {
    try {
      imageSrc = new URL(getCodeBase(), imageFileName);
    catch (MalformedURLException e) {
    }
    buildUI();
  }

  public void buildUI() {
    final ImageDrawingComponent id = new ImageDrawingComponent(imageSrc);
    add("Center", id);
    JComboBox choices = new JComboBox(id.getDescriptions());
    choices.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        JComboBox cb = (JComboBoxe.getSource();
        id.setOpIndex(cb.getSelectedIndex());
        id.repaint();
      };
    });
    add("South", choices);
  }

  public static void main(String s[]) {
    JFrame f = new JFrame("ImageDrawing");
    f.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
    URL imageSrc = null;
    try {
      imageSrc = ((new File(imageFileName)).toURI()).toURL();
    catch (MalformedURLException e) {
    }
    ImageDrawingApplet id = new ImageDrawingApplet(imageSrc);
    id.buildUI();
    f.add("Center", id);
    f.pack();
    f.setVisible(true);
  }
}

   
    
    
    
    
    
  
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