[GEM-dev] fullscreen on second screen linux does not work

[chris clepper]

>
> well, as cyrille suggested: using no borders, an offset of 0+0 and a
> dimension of whateve should be almost as good as "fullscreen"

This is indeed how 'fullscreen' works on OSX.  Although I initially did 
this to get around a change in the Apple GL implementation, it might be 
worthwhile to do this for all platforms.  All the code does is ask for 
the display coordinates of each attached device, number them starting 
from the main display and then compute the size and position for the 
window to cover that display completely.  I don't know how easy or 
possible this is on Windows and Linux, but it does enable the use of 
any display device and also multiple GEM instances to have a 
'fullscreen' as well.

cgc