gl4java-usergroup

[gl4java-usergroup] RE: gl4java-usergroup digest, Vol 1 #302 - 3 msgs

[<pet...@ba...>]

Sven said:

> Well - beside the new great GL4Java FAQ ;-),
> the new release candidat is on it's way now !
> 
> for short:
> 
> <snip>
> 
>         Better Offscreen Rendering support



I could do with some clarification here. I'm considering using OSMesa to 
create an alternative to GLCanvas to allow me to run my offscreen GL 
programs without running an X server.

Does your new offscreen rendering support running without an X server or 
not?

Thanks,

Pete




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Re: [gl4java-usergroup] RE: gl4java-usergroup digest, Vol 1 #302 - 3 msgs

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

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On Friday 07 December 2001 10:54, pet...@ba... wrote:
> Sven said:
> > Well - beside the new great GL4Java FAQ ;-),
> > the new release candidat is on it's way now !
> >
> > for short:
> >
> > <snip>
> >
> >         Better Offscreen Rendering support
>
> I could do with some clarification here. I'm considering using OSMesa to
> create an alternative to GLCanvas to allow me to run my offscreen GL
> programs without running an X server.
>
> Does your new offscreen rendering support running without an X server or
> not?
>
> Thanks,
>
> Pete
>

oops .. sorry group, i forgot to post the answer to this list ..

well, the issue is clear now, he soes not wants an X server ..

so he needs a new implementation for an interface
for a os independend GL / OS layer .., e.g. OSMesa !

On Friday 07 December 2001 10:54, pet...@ba... wrote:
> Sven said:
> > <snip>
> >         Better Offscreen Rendering support
>
> I could do with some clarification here. I'm considering using OSMesa to
> create an alternative to GLCanvas to allow me to run my offscreen GL
> programs without running an X server.
>
> Does your new offscreen rendering support running without an X server or
> not?
>

NOT

the issue, you do start here, has nothing todo with Offscreen rendering,
neither with xgl nor with wgl, mgl, or whatever !

you want a different OpenGL OS interface.

for example, we use:
        win32: JNI -> WGL + OpenGL
        X11: JNI -> XGL + OpenGL

so you may want to introduce a different system interface to OpenGL, e.g
the OSMesa ones ?
        w32,x11, ..: JNI -> OSMesa + OpenGL

?

For what ?

For the reason, you want to create rendered images on a UNIX server using OpenGL
(software or hardware) but without an XServer, you have no chance, right.
But how about starting the Xvfb (virtual framebuffer) ?

Well, if you want to create opengl rendered pictures in a file via GL4Java,
i advice you to use an hardware accelerated X Server + OpenGL and then just create 
a snapshot - or use the offscreen support (mostly software rendered ..) for very big pictures ..

otherwise, just implement another completly system independend interface to such 
an independend one to opengl ! I will help ! can't be so hard !

hope this helps ..

> Thanks,
>
> Pete
>

regards, sven
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