Java-Gaming.org    
Featured games (79)
games approved by the League of Dukes
Games in Showcase (472)
Games in Android Showcase (105)
games submitted by our members
Games in WIP (524)
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  
  Problems with double buffering  (Read 930 times)
0 Members and 1 Guest are viewing this topic.
Offline PRE

Junior Newbie




Xuaaa


« Posted 2003-04-25 11:06:58 »

Hi all. I am having troubles double buffering my images. I hope that you can help me and tell me what I'm doing worng.

I have my paint method in my Actor class (base class of all showables) like this:

   [source]  
public void paint( Graphics g )
{
     if( img == null )
           throw new RuntimeException("Calling Paint and image not Created!!!");

     if( buffer == null ) {
           buffer = Util.getBuffer(img);
           //buffer = img;
           
     }
     g.drawImage(buffer,tile.x,tile.y,TILE_SIZE,TILE_SIZE,null);
}
 

And that Util.getBuffer is a static method that allows me to have secevral objects sharing the same image(BufferedImage ins this case). I have it like this:

     
public static Image getBuffer( Image img )
{
     if( allBuffers.containsKey(new Integer(img.hashCode())) )
           return (BufferedImage)allBuffers.get(new Integer(img.hashCode()));
           
     BufferedImage backbuffer = new BufferedImage(Actor.TILE_SIZE, Actor.TILE_SIZE, BufferedImage.TYPE_4BYTE_ABGR);
     Graphics backbuffergc = backbuffer.getGraphics();
     backbuffergc.drawImage(img,0,0,Actor.TILE_SIZE,Actor.TILE_SIZE,null);
     
     allBuffers.put(new Integer(img.hashCode()),backbuffer);
     
     return backbuffer;
}
 [/source]

Well, like this, the Window is blank, no image is shown. Why?
I am using 45x45 png's in MDK 9.1!

Tkz for any help.

[]

:: {PRE}'s Programming Depot  ::
.: "There are 10 types of people in this world. Those who know binary and those who don't."
.: HopeInMankind.cpp :3382: Confused by earlier errors, bailing out.
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

Riven (11 views)
2014-07-10 20:20:18

CopyableCougar4 (17 views)
2014-07-10 02:26:14

CopyableCougar4 (25 views)
2014-07-09 02:55:38

Code Mage (25 views)
2014-07-08 23:57:00

Code Mage (11 views)
2014-07-08 23:49:08

AppleSauce (20 views)
2014-07-08 19:25:32

CopyableCougar4 (21 views)
2014-07-06 01:51:26

ipe369 (26 views)
2014-07-05 14:18:25

vastrolorde (37 views)
2014-07-04 18:45:44

theagentd (54 views)
2014-07-02 22:19:37
HotSpot Options
by dleskov
2014-07-08 03:59:08

Java and Game Development Tutorials
by SwordsMiner
2014-06-14 00:58:24

Java and Game Development Tutorials
by SwordsMiner
2014-06-14 00:47:22

How do I start Java Game Development?
by ra4king
2014-05-17 11:13:37

HotSpot Options
by Roquen
2014-05-15 09:59:54

HotSpot Options
by Roquen
2014-05-06 15:03:10

Escape Analysis
by Roquen
2014-04-29 22:16:43

Experimental Toys
by Roquen
2014-04-28 13:24:22
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!