Java-Gaming.org Hi !
Featured games (88)
games approved by the League of Dukes
Games in Showcase (679)
Games in Android Showcase (194)
games submitted by our members
Games in WIP (732)
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  
  Offscreen rendering revisited  (Read 1077 times)
0 Members and 1 Guest are viewing this topic.
Offline dolachin

Senior Newbie




Java games rock!


« Posted 2003-11-24 03:50:47 »

Hi,

I'm revisiting a topic from three months ago. I've been trying to incorporate the advice I got at this forum at get it to work on my own - and failed!!!

I'm working on a scientific application which shows the evolution of a shape. Every once in a while I want to be able to snap a picture of what's going on. I don't want to overload you, potential helpers, with code so I will just present the code for my takeAPicture procedure (with comments) and may be you will be able to spot something. I am very happy to post more code.


Many thanks in advance for any advice.


 public BufferedImage takeAPicture(int inWidth, int inHeight) {

   if (myOffScreenBuffer == null) { // class member elem
     GLCapabilities pbCaps = new GLCapabilities();
     pbCaps.setDoubleBuffered(false);
     myOffScreenBuffer = myCanvas3D.createOffscreenDrawable(pbCaps, inWidth, inHeight);
     myOffScreenBuffer.addGLEventListener(new OffScreenGLEventListener());

// I have a hard time getting init() to be called in
// OffScreenGLEventListener. I have to resize the live
// window, call takeAPicture again, and only then it
// gets called.

   }

   BufferedImage pbImage = new BufferedImage(inWidth, inHeight, BufferedImage.TYPE_3BYTE_BGR);
   DataBufferByte dbByte = (DataBufferByte) pbImage.getRaster().getDataBuffer();
   myOffScreenBuffer.display();

   myOffScreenBuffer.getGL().glReadPixels(0, 0, inWidth, inHeight, GL.GL_BGR, GL.GL_UNSIGNED_BYTE, dbByte.getData());

   return pbImage; // returns nothing but black pixels
 }

Would you like to see my OffScreenGLEventListener?
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 
Hydroque (17 views)
2016-05-26 14:45:46

Mac70 (39 views)
2016-05-24 21:16:33

theagentd (42 views)
2016-05-14 18:38:35

theagentd (76 views)
2016-05-10 22:37:41

theagentd (84 views)
2016-05-10 22:33:46

IanParcs (110 views)
2016-04-18 14:18:53

KaiHH (108 views)
2016-04-18 08:35:41

KaiHH (130 views)
2016-04-15 12:43:58

theagentd (135 views)
2016-04-14 02:16:17

theagentd (157 views)
2016-04-14 02:15:43
FPS Camera Tutorial
by Hydroque
2016-05-22 05:40:58

Website offering 3D Models specifically for games for free
by vusman
2016-05-18 17:23:09

Website offering 3D Models specifically for games for free
by vusman
2016-05-09 08:50:56

Website offering 3D Models specifically for games for free
by vusman
2016-05-06 11:10:21

Website offering 3D Models specifically for games for free
by vusman
2016-04-29 12:56:17

List of Learning Resources
by SilverTiger
2016-02-05 09:39:47

List of Learning Resources
by SilverTiger
2016-02-05 09:38:38

List of Learning Resources
by SilverTiger
2016-02-05 09:35:50
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!