Java-Gaming.org Hi !
Featured games (85)
games approved by the League of Dukes
Games in Showcase (611)
Games in Android Showcase (172)
games submitted by our members
Games in WIP (657)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  Alpha Filter  (Read 1116 times)
0 Members and 1 Guest are viewing this topic.
Offline drewlane

Senior Newbie




I am the Walrus!


« Posted 2003-08-05 14:26:36 »

Java 1.1

I'm trying to make a spirte that fades out to completely transparent using java.awt.image.ImageFilter class.

I want to make this Java 1.1 compatible since the rest of my game is.

So far, I've been able to create an image that fades out, but I'm having trouble getting the background to stay transparent.

I'm using a GIF with transparent background, but I only want the spirte image itself to fade.  Right now, when I put the image through the filter, the transparent background is showing as a translucent white.

Any thoughts on the best way to handle this?

Is there a way to specify that a certain color (white) will always be completely transparent?

Thanks,

Drew
Offline trembovetski

Senior Devvie




If only I knew what I'm talking about!


« Reply #1 - Posted 2003-08-06 02:01:01 »

It'd be easier if you post some code from your filter..
Offline NexusOne

Junior Devvie




Java games rock!


« Reply #2 - Posted 2003-08-13 05:06:28 »

here is the complete answer to your question:

NOTE: I wrote this code based on a similar function found at www.rgagnon.com, check them out they have a lot of useful source code

public Image makeAColorTransparent(Image image, final Color tColor){
    ImageFilter filter = new RGBImageFilter(){
         public final int filterRGB(int x, int y, int rgb){
              if(rgb == tColor.getRGB()){
                   return 0x00FFFFFF & rgb;
              }
              else return rgb;
         }
    };
    ImageProducer iProducer = new FilterImageSource(image.getSource(), filter);
    return Toolkit.getDefaultToolkit().createImage(iProducer);
}
             
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 
GamerC4 (22 views)
2015-08-22 20:38:50

GamerC4 (20 views)
2015-08-22 20:37:18

GamerC4 (24 views)
2015-08-22 20:37:01

Kefwar (26 views)
2015-08-22 18:07:24

GamerC4 (23 views)
2015-08-22 01:00:24

GamerC4 (36 views)
2015-08-22 01:00:17

GamerC4 (22 views)
2015-08-22 00:57:35

GamerC4 (24 views)
2015-08-22 00:56:59

BurntPizza (29 views)
2015-08-21 01:38:01

KaiHH (43 views)
2015-08-19 15:01:05
Rendering resources
by Roquen
2015-08-17 12:42:29

Rendering resources
by Roquen
2015-08-17 09:36:56

Rendering resources
by Roquen
2015-08-13 07:40:51

Networking Resources
by Roquen
2015-08-13 07:40:43

List of Learning Resources
by gouessej
2015-07-09 11:29:36

How Do I Expand My Game?
by bashfrog
2015-06-14 11:34:43

List of Learning Resources
by PocketCrafter7
2015-05-31 05:37:30

Intersection Methods
by Roquen
2015-05-29 08:19:33
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!