Login | Register   
LinkedIn
Google+
Twitter
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX


Tip of the Day
Language: Jvaa
Expertise: Intermediate
Jul 15, 2008

WEBINAR:

On-Demand

Full Text Search: The Key to Better Natural Language Queries for NoSQL in Node.js


Create the "Night" Filter Using the RGBImageFilter Class

The following code uses the RGBImageFilter class to create the "night" effect on an image:

import java.awt.image.*;

public class NightFilter extends RGBImageFilter {

 double frac;
  //0.0<=g<=1.0
  public NightFilter(double g) {
    frac=g;
  }

  public int filterRGB(int x, int y, int rgb) {

    if (frac<=0) return 0xFF000000;
    if (frac>1.0) return 0xFF000000;

    int red=rgb & 0x00FF0000;red>>>=16;
    int green=rgb & 0x0000FF00;green>>>=8;
    int blue=rgb & 0x0000FF;
    
    int r=(int) (red*frac);
    int g=(int) (green*frac);
    int b=(int) (blue*frac);
    
    return (0x000000FF<<24) | (r <<16) | (g << 8) | b; 
  }
}
Leonard Anghel
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
Thanks for your registration, follow us on our social networks to keep up-to-date