[Gllug] Screen capture [again ;)]

[ChrisJS at aol.com]

In a message dated 30/07/2001 01:20:31 GMT Daylight Time, richard at vmlinuz.org 
writes:

> Is it a particular program you want to capture?  Is it by any chance running
>  in a *term (xterm, eterm, konsole, etc.)?  It might be worth your looking 
as
>  script or tee if it is a console program, or VNC and/or the nested virtual 
X
>  server if it isn't.
>  Try describing your problem (in the computer science sense of the term) in
>  detail.  I'm sure we can come up with a solution on the list.

I'm looking at writing a 3d window manager. I know its been done, but it 
always seems to be pictures floating in space, whereas I'm hoping to create a 
true environment. I have plenty of ideas to justify the project (in my mind 
at least !) and am coding it more as a learning experience than to release a 
product, though naturally I hope that it would progress to that ;)
So the actual problem I'm currently facing is the mapping of any programs the 
user runs to the 3d objects within the world. I'm using the OpenGL libraries 
and that's all well and good. My plan was to convert the screen output of 
each program to a texture which would then be mapped to an object in the 
opengl scene. Since the majority of programs don't need a great refresh rate 
and I would only be doing it for visible windows, this seemed an 
appropriately speedy method.
Therein lies my question; how can I grab the display of open programs 
(without them actually being put on screen) and convert that to a bitmap ?
VNC ? I've heard of it, but its too late at night to be Googling... Would 
looking into the nested virtual X server involve modifying X code or simply 
finding a place for my WM to sit in the display chain ?

Thanks for the interest :)

c
  
>  It sounds more interesting than bloody paranoid fantasies, anyway :-)
lol, cheers ;)

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