MIDP2.0中對圖片象素級處理(2)

import Java.io.IOException;

import Javax.microedition.lcdui.Canvas;
import Javax.microedition.lcdui.Graphics;
import Javax.microedition.lcdui.Image;

/**
 * @author 劉軍
 * @version 1.0
 */
public class TCanvas extends Canvas implements Runnable{
 Image image;//要處理的圖片
 int argb[];
 int a= 0;//把象素的透明度初始值設置為0，然後在線程中不斷地增加這個值
 public TCanvas() {
  super();
  try {
   image = Image.createImage("/test.png");//導入圖片
  } catch (IOException e) {
   e.printStackTrace();
  }
  argb = new int[image.getWidth()*image.getHeight()];
  image.getRGB(argb,0,image.getWidth(),0,0,image.getWidth(),image.getHeight());//獲得圖片的ARGB值
  int temp;
  
  for(int i=0;i<argb.length;i++)
  {
   argb[i]=(a<<24) | (argb[i] & 0x00FFFFFF);// 修改最高2位的值
  }
  Thread t = new Thread(this);
  t.start();
 }

 protected void paint(Graphics g) {
  g.setColor(0xffffff);
  g.fillRect(0,0,getWidth(),getHeight());
  g.setColor(0);
  g.drawImage(image,0,0,Graphics.TOP|Graphics.LEFT);
  g.drawRGB(argb,0,image.getWidth(),0,100,image.getWidth(),image.getHeight(),true);// 畫象素數組
  g.drawString(a+"",10,90,Graphics.TOP|Graphics.LEFT);
 }
 public void run()
 {
  while(a<256)
  {
   //改變象素內容
   for(int i=0;i<argb.length;i++)
   {
    argb[i]=(a<<24) | (argb[i] & 0x00FFFFFF);// 修改最高2位的值
   }
   repaint();//重繪屏幕
   a++;
   try {
    Thread.sleep(100);
   } catch (InterruptedException e) {
    e.printStackTrace();
   }
  }
 }
}