Hi !
Featured games (84)
games approved by the League of Dukes
Games in Showcase (551)
Games in Android Showcase (139)
games submitted by our members
Games in WIP (593)
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  
  BufferedImage.getSubImage() ?  (Read 3015 times)
0 Members and 1 Guest are viewing this topic.
Offline appel

JGO Wizard

Medals: 69
Projects: 4

I always win!

« Posted 2005-12-25 01:46:57 »

I'm using getSubImage() to get a BufferedImage area of an image and it draws it very slowly, here's what I'm doing:
// initialize.
      BufferedImage sprites = null;
      try {
         sprites ="sprites.gif"));
      } catch (IOException e1) {

      BufferedImage badGuy = sprites.getSubimage(82,0,19,25);
      BufferedImage goodGuy = sprites.getSubimage(56,0,26,13);
      BufferedImage bullet = sprites.getSubimage(41,25,16,5);
      BufferedImage explosion = sprites.getSubimage(0,0,32,31);


// start game loop
// update world
// draw world
g.drawImage(...); // for each of those 4 images.

pretty straight forward, but the framerate drops down to 1 fps, how can I speed things up, or accomplish what I'm trying to do in a different way?

Check out the 4K competition @
Check out GAMADU (my own site) @
Offline trembovetski

Senior Devvie

If only I knew what I'm talking about!

« Reply #1 - Posted 2005-12-25 21:08:25 »

The getSubImage() call disables the ability to hardware accelerate the image.

You have a choice: either create a bunch of images (one per character) or
just leave the single image with all sprites and use one of the drawImage calls
which allows you to specify a source (and destination if needed) rectangle.

So basically instead of a subimage you'll have a Rectangle (representing
the sprite coordinates in the one large sprite image) associated
with a character.

Hope this helps..

Java2D Team
Offline K.I.L.E.R

Senior Devvie

Java games rock!

« Reply #2 - Posted 2005-12-28 18:53:07 »

Alternatively you could create another image and copy the pixels from the subbed image into the new image and return the new image.
You get the sub image and still have acceleration.

Is there a name for a "redneck" programmer?

Unemployed. Wink
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline appel

JGO Wizard

Medals: 69
Projects: 4

I always win!

« Reply #3 - Posted 2005-12-28 21:36:49 »

Yes, both good ideas, have opened up many possibilites for me. Thanks for the help Smiley

Check out the 4K competition @
Check out GAMADU (my own site) @
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.

Archive (29 views)
2015-01-29 04:26:08

theagentd (24 views)
2015-01-28 15:33:52

GamerIDGoesHere (36 views)
2015-01-27 01:23:23

GamerIDGoesHere (37 views)
2015-01-27 01:22:15

CopyableCougar4 (47 views)
2015-01-27 00:34:41

CopyableCougar4 (30 views)
2015-01-26 04:47:56

Olo (23 views)
2015-01-25 21:26:00

Olo (28 views)
2015-01-25 18:44:22

Robo11 (46 views)
2015-01-25 06:14:26

basil_ (38 views)
2015-01-17 22:29:32
2D Dynamic Lighting
by ThePixelPony
2015-01-01 20:25:42

How do I start Java Game Development?
by gouessej
2014-12-27 19:41:21

Resources for WIP games
by kpars
2014-12-18 10:26:14

Understanding relations between setOrigin, setScale and setPosition in libGdx
by mbabuskov
2014-10-09 22:35:00

Definite guide to supporting multiple device resolutions on Android (2014)
by mbabuskov
2014-10-02 22:36:02

List of Learning Resources
by Longor1996
2014-08-16 10:40:00

List of Learning Resources
by SilverTiger
2014-08-05 19:33:27

Resources for WIP games
by CogWheelz
2014-08-01 16:20:17 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‑
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!