Re: [gl4java-usergroup] glReadPixels(...) not working

[<Px...@ao...>]

More info:
     When it came time to graph I tried to render my graph to GLOffScreenDrawable and then do glReadPixels it produced the same problem---a pixel array of 0's (from when it was initialized). I've even put some 1's in the initial pixel array to see if anything would change but the 1's stay ones--glReadPixels isn't doing anything.
    Then I tried TGATextureGrabber to save it as a .tga, but it was still an all black (all 0's) picture.
    THEN, I went to the demo's for GLOffScreenDrawable and grabbed the classes gearsOffScreen2Tga.java and gearRenderer and tried to execute the main in gearsOffScreen2Tga and got a big exception.  Here are the first few and last lines of it...

An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : EXCEPTION_ACCESS_VIOLATION occurred at PC=0x6D2150D6
Function=JNU_GetEnv+0xC
Library=c:\j2sdk1.4.0_01\jre\bin\java.dll

Current Java thread:
    at sun.awt.font.NativeFontWrapper.registerFonts(Native Method)
    - locked <06BABD58> (a java.lang.Class)
    at sun.java2d.SunGraphicsEnvironment.addPathFonts(SunGraphicsEnvironment.java:709)
    at sun.java2d.SunGraphicsEnvironment.registerFonts(SunGraphicsEnvironment.java:560)
    at sun.java2d.SunGraphicsEnvironment.access$000(SunGraphicsEnvironment.java:57)
    at sun.java2d.SunGraphicsEnvironment$1.run(SunGraphicsEnvironment.java:160)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.java2d.SunGraphicsEnvironment.<init>(SunGraphicsEnvironment.java:86)

.......

Local Time = Thu Jun 13 09:36:09 2002
Elapsed Time = 1
#
# The exception above was detected in native code outside the VM
#
# Java VM: Java HotSpot(TM) Client VM (1.4.0_01-b03 mixed mode)
#


Is this just a matter of permissions somewhere??  If it is can you point me in the right direction?  I really do appreciate any and all help.

Dennis