Re: OpenGL resolutions

[Katie Lucas <katie@fysh.org>]

> Yes - that's because it's telling you the maximum viewport size that the
> OpenGL driver can support - and NOT the maximum that your CRT can display.
> 
> Fundamentally, you can't ask this question of OpenGL.  The reason is that
> it is illegal to make *ANY* OpenGL call before you have a display context
> open.  At that stage, all the issues of what you *might* be able to do
> are subsumed by the fact that you've already done them.
> 


Oh no, this would be fine - it's the fact that I start OpenGL,
guessing some size for the window, Voodoo starts up in <some mode> and
I can't find out what that <some mode> is... if I know what size the
actual mode is, I can set the viewport to fill that...

> OpenGL itself can (or should) answer them.
> 
> You can ask GLUT 'GLUT_SCREEN_WIDTH' and 'GLUT_SCREEN_HEIGHT' using
> glutGet...but I guess it's not necessarily true that all OpenGL
> implementations can support windows that are as big as the screen...
> a Voodoo-1 running Mesa's in-a-window hack (for example) is still
> limited to it's native resolution.
> 
> Bottom-line is I don't know...but I do know that the answer cannot
> come from OpenGL itself.
> 
> 
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