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How to restore OpenGL default state ?

Hello everybody,
I think it is maybe not possible but who kows ? ;)
I'm developping an OpenGL plug-in under X-Plane 9 (flight simulation game) and I would like to recover OpenGL "default" draw state (enable bits, binds, unbinds, matrixes, etc...) like if I've just opened a new window... Some kind of "glLoadDefaults()" that may restore all Internal OpenGL states (enable bits, matrixes, etc...).
Do some of you think it is possible ? if yes : how ?

I'm asking you that question because into my plug-in the FrameBufferObjects (FBO) doesn't seem to work in the same way as in X-Plane 8.XX, (same PC, same VideoCard, same Drivers), so I'm beginint to wonder if X-Plane 9 doesn't sets a "special" context I'm not aware of squizzing FBOs (?!)

thank you for your attention,
Alexander

vhpgomes

It's not exactly what you asked for but you could call glPushAttrib(GL_ALL_ATTRIB_BITS); at the beginning of your code, and then call glPopAtrib(); to get it back.

This will save a lot of state variables, as can be seen here:

http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/pushattrib.html

But some things may not be saved, as can be seen here:

http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=244259

Hope this helps,

Victor

Alexander

ASKER

Sorry, I'm already aware about PushAttrib()/PopAttrib() functions. I'm looking for something that can restore a kind of "initial default state", in other words, the state at the main() enter point before any GL draw or setting done...

ASKER CERTIFIED SOLUTION

vhpgomes

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Alexander

ASKER

That's a good idea, I've already started to set it in place this afternoon, I'll do some tests tonight, could be the answer, I'll keep you informed...

Alexander

ASKER

It is the good idea, everything works very well now !