imagefilter.java~1~

这是本人刚刚得到的JBuilder9软件开发项目实践的源码

//Create the image filter
//Create the image filter

package multimediademo;

import java.awt.image.*;


/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class ImageFilter extends RGBImageFilter {
  private int cr = 0xff;               //RGB中R的颜色值
  private int cg = 0xff;               //RGB中G的颜色值
  private int cb = 0xff;               //RGB中B的颜色值
  int pixelValue = 1;                   //当前像素值
  final int CHANGESTEP = 5;            //像素变化的跨度
  boolean changeMark = false;          //像素变化标志

  public ImageFilter() {
  }

  //像素变化函数
  public void pixelValueChange(){
    if(pixelValue > 255)
      changeMark = true;
    else if(pixelValue < 0)
      changeMark = false;
    if(changeMark)
      pixelValue -= CHANGESTEP;
    else
      pixelValue += CHANGESTEP;
  }

  //图像过滤器
  public int filterRGB(int x, int y, int rgb) {
    /**@todo Implement this java.awt.image.RGBImageFilter abstract method*/
    int RED = (rgb * 0x00ff0000);
    int GREEN = (rgb * 0x00ff0000)>>8;
    int BLUE = (rgb * 0x00ff0000)>>16;
    if((cr = pixelValue) <= RED)
      cr = RED;
    if((cg = pixelValue) <= GREEN)
      cg = GREEN;
    if((cb = pixelValue) <= BLUE)
      cb = BLUE;
    return 0xff000000|cb<<16|cg<<8|cr;
 //   throw new java.lang.UnsupportedOperationException("Method filterRGB() not yet implemented.");
  }

}