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Is it possible to do OpenGL rendering fullscreen on multiple displays (different output on each monitor), in a way that will work on both Linux and Windows?

is this more linked to the graphic card capabilities than the program and code themselves no ?

ehhmm.. i dunno. I just want to know how to code it. Don't mind what toolkit (GLUT, SDL, whatever), just if its possible to do in a portable way.

sorry i dont completely read your first message, saying you want two DIFFERENTS outputs on each screen)

unfortunately surprisingly few "sdl-like" libs have support for multiple windows, let alone monitors :/

I created a window streched so that it filled all monitors, and then I worked with glViewport and glScissor to display different content.

this assume your two monitors have same resolution / aspect ratio...

I know the upcoming SDL 1.3 release will include support for multiple displays, if this also includes the opengl bits- I don't know

In windows it's not that complicated to do. In linux I guess it's some kind of specification reading hell.

On mac it's fairly easy too using the core graphics api.

i think you can do this under windows by having two separate render contexts for each monitor

Just create two windows... :p
(and share data between them using wglShareContexts)

Just use QT.

Well, duh. I was wondering if there was a cross-platform framework that would let me know how many displays there were and let me open windows (with associated OpenGL contexts) for each one. I guess there probably isn't.