serializableimagedata.java

java开发的netbeans插件中的application原型

/*
 * SerializableImage.java
 *
 * Created on 2006年11月19日, 下午3:58
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package cn.edu.tsinghua.thss.talkie.capture;


// this is not the best way to implement this (performancewise)


import javax.swing.*;
import java.awt.*;
import java.awt.image.*;
import java.io.*;
import java.util.zip.*;

public class SerializableImageData implements java.io.Serializable {
    int width;
    int height;
    byte compressedData[];
    long checksum;
    
    public SerializableImageData(){
    }
    
    public SerializableImageData(Image i){
        this(new ImageIcon(i));
    }
    
    public SerializableImageData(ImageIcon i){
        BufferedImage bi = new BufferedImage(i.getIconWidth(), i.getIconHeight(), BufferedImage.TYPE_INT_RGB);
        i.paintIcon(null,bi.createGraphics(),0,0);
        setImageData(bi);
    }
    
    public SerializableImageData(BufferedImage i){
        setImageData(i);
    }
    
    public void setImageData(BufferedImage i){
        width = i.getWidth();
        height = i.getHeight();
        
        int data[][] = new int[width][height];
        
        for (int w=0; w<width; w++)
            for (int h=0; h<height; h++)
                data[w][h] = i.getRGB(w,h);
        
        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ObjectOutputStream oos = new ObjectOutputStream(new GZIPOutputStream(baos, 512*1024));
            oos.writeObject(data);
            oos.close();
            
            compressedData = baos.toByteArray();
            
            makeCheckSum();
            
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    protected int[][] getUncompressedData(){
        try {
            ByteArrayInputStream bais = new ByteArrayInputStream(compressedData);
            ObjectInputStream ois = new ObjectInputStream(new GZIPInputStream(bais,512*1024));
            int data[][] = (int[][])ois.readObject();
            ois.close();
            
            return data;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
    
    public BufferedImage getImage(){
        
        BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        int data[][] = getUncompressedData();
        
        for (int w=0; w<width; w++)
            for (int h=0; h<height; h++)
                bi.setRGB(w,h,data[w][h]);
        
        return bi;
    }
    
    public void makeCheckSum(){
        Adler32 a32 = new Adler32();
        a32.update(compressedData);
        checksum = a32.getValue();
    }

    public boolean equals(Object obj){
        if (obj instanceof SerializableImageData) {
            SerializableImageData id = (SerializableImageData)obj;
            return(id.checksum == this.checksum);
            
        } else {
            return false;
        }
    }
    
}