Java-Gaming.org    
Featured games (91)
games approved by the League of Dukes
Games in Showcase (576)
games submitted by our members
Games in WIP (497)
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  
  Transparent PBuffers  (Read 856 times)
0 Members and 1 Guest are viewing this topic.
Offline javazoid

Junior Member




Where's Flender?


« Posted 2004-09-30 12:59:06 »

any chance with LWJGL to render to a PBuffer and save it to PNG with alpha ?

Mik
--

Online Spasi
« Reply #1 - Posted 2004-09-30 13:32:09 »

You could grab the pbuffer contents with glReadPixels and then create the .png with ImageIO. It's going to be slow though, both the glReadPixels and (mostly) the PNG compression take time. If that's ok with you, go for it, else try using an uncompressed format.

I use my own TIFF writer to avoid ImageIO, it's quite fast too.
Offline javazoid

Junior Member




Where's Flender?


« Reply #2 - Posted 2004-09-30 14:49:34 »

I'm not sure the PBuffer will hold the alpha channel information. Can you supply a working sample ?

Without requesting an FBConfig with alpha, there is no
assurance that there will even be an alpha channel in the Pbuffer..

Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Online Spasi
« Reply #3 - Posted 2004-09-30 16:04:40 »

Exactly, you have to request an alpha channel. Just like when creating the display, pass an 8 to the corresponding argument of the Pbuffer constructor.
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.

xsi3rr4x (12 views)
2014-04-15 18:08:23

BurntPizza (10 views)
2014-04-15 03:46:01

UprightPath (24 views)
2014-04-14 17:39:50

UprightPath (10 views)
2014-04-14 17:35:47

Porlus (27 views)
2014-04-14 15:48:38

tom_mai78101 (49 views)
2014-04-10 04:04:31

BurntPizza (107 views)
2014-04-08 23:06:04

tom_mai78101 (207 views)
2014-04-05 13:34:39

trollwarrior1 (176 views)
2014-04-04 12:06:45

CJLetsGame (182 views)
2014-04-01 02:16:10
List of Learning Resources
by Longarmx
2014-04-08 03:14:44

Good Examples
by matheus23
2014-04-05 13:51:37

Good Examples
by Grunnt
2014-04-03 15:48:46

Good Examples
by Grunnt
2014-04-03 15:48:37

Good Examples
by matheus23
2014-04-01 18:40:51

Good Examples
by matheus23
2014-04-01 18:40:34

Anonymous/Local/Inner class gotchas
by Roquen
2014-03-11 15:22:30

Anonymous/Local/Inner class gotchas
by Roquen
2014-03-11 15:05:20
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!