Re: [gl4java-usergroup] GLAnimJPanel not accelerated ???

[Sven G. <sgo...@ja...>]

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On Thursday 08 February 2001 22:31, you wrote:
> Hi,
>
> I had a demo running well, using GLAnimCanvas. I can't keep this class
> because it is a heavyweight class and I have to use it with lightweight
> classes, making it appear always on top of them. I replaced GLAnimCanvas
> with GLAnimJPanel and now opengl seems to be not accelerated and uses 100%
> of CPU. What happens ?
>
> Thanks for your help
>
> Nicolas Cadilhac

GLAnimJPanel runs at lightweight either .. but not for the cpu :))

Well, it uses offscreen rendering, 
where hardware acceleration is usually not supported 
by the graphic cards OpenGL driver !

But my be with jdk1.4 and/or glx-pbuffers (X11, Win32: ??),
a bit more acceleration (if not true hw acceleration) can be done.

The problem is, that there is no true hw display for a lightweight 
window. So currently the OpenGL rendering is done offscreen
and copied into the lightweight window, using GLU.
I know .. very bad !

Ideas ?

sven

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