Print Page - AWTGLCanvas does not work with JDK 1.7

Title: AWTGLCanvas does not work with JDK 1.7
Post by: Kai on September 30, 2009, 13:24:35

Hi,

I have noticed a strange bug? with JDK 1.7 Build 72:
The swapBuffer does not seem to update the Canvas anymore...

All GL commands will be executed without any errors/warnings/etc. but I just do not get to see what I drew.
Even if I just make a glClear with a color, it won't work!

I tried the current JKD 1.6 build, and everything works fine, there.

Did anyone experience this, too?

Title: Re: AWTGLCanvas does not work with JDK 1.7
Post by: lainmaster on October 02, 2009, 00:36:32

Any reason not to use Display.setParent ?

Title: Re: AWTGLCanvas does not work with JDK 1.7
Post by: Kai on October 02, 2009, 23:29:01

QuoteAny reason not to use Display.setParent ?

Yes. I need multiple windows (we are using it in a CAVE environment) (4 windows per render node).

Title: Re: AWTGLCanvas does not work with JDK 1.7
Post by: Matzon on October 03, 2009, 07:01:00

I am not using JDK 7 at all - does the issue occur in 71? is it fixed in 73?

Title: Re: AWTGLCanvas does not work with JDK 1.7
Post by: Kai on October 03, 2009, 08:03:57

Quotedoes the issue occur in 71? is it fixed in 73?

Interestingly, it does not occur in b71, but sadly it does occur in b73!

Title: Re: AWTGLCanvas does not work with JDK 1.7
Post by: Matzon on October 03, 2009, 13:54:49

Quote from: Kai on October 03, 2009, 08:03:57
Quotedoes the issue occur in 71? is it fixed in 73?
Interestingly, it does not occur in b71, but sadly it does occur in b73!

so b72 introduced an "issue"?
http://download.java.net/jdk7/changes/jdk7-b72.html doesnt list anything particularly interresting ...

Title: Re: AWTGLCanvas does not work with JDK 1.7
Post by: Fool Running on October 05, 2009, 15:14:37

The change for "Javaw process taking up 80-90 percent of CPU time!" looks kinda suspicious to me:
http://hg.openjdk.java.net/jdk7/jdk7/jdk/rev/559fb14d0ae9
But I'm really not sure if that could cause your problems or not.

Title: Re: AWTGLCanvas does not work with JDK 1.7
Post by: Kai on October 05, 2009, 18:37:41

Thanks at @ for you replies.

I circumvented this issue by switching back to Java 1.6.
The reason for using Java 1.7 in the first place was the need to load multi-channel (5.1 channels) wave files, as there is a nice class "WaveExtensibleFileReader" that allows this.

Now, I found another way to load these wave files and can go back to 1.6, and after all, it sounds a little strange to move to another java version just because of a new class :-), but still, this bug is annoying...

LWJGL Forum

Programming => Lightweight Java Gaming Library => Topic started by: Kai on September 30, 2009, 13:24:35