Hello Hugo,

 PR> add. I would like to add support for writting to a window that is
 PR> overlaped by another window (background window)... So far the only
 PR> when writting to the actual screen I'll have to check every other
 PR> window shown to see if it overlaps it...

 hl> If you follow the order of the windows, starting with 
 hl> the screen background and ending with the window which 
 hl> has the context, you don't have to recalculate each 
 hl> windows visibilty.  Use a buffer for the entire screen 
 hl> and show the end result when you're done moving the 
 hl> windows into it: what should be invisible, will've been overwritten.

Yes, but if you have say 5 windows open and are doing frequent updates to
underlying windows, It seems to me that it'd be pretty wastefull to re-draw
every single window... There must be a better (albiet more complicated)
way.
                Paul Rider

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