🚀 go-pugleaf

pan@athena.mit.edu (Howard W Pan) writes:
> If I drew a picture that was larger than the frame of the View, only the part
> that is within the frame is displayed. But what happens to the rest of the
> picture? Is the other part kept in memory or is it just discarded and
> regenerated when I resize my frame? Does this have anything to do 
> with whether the Window on which my View is buffered or retained? 

What kind of picture are you drawing?  Are you drawing with PostScript  
operators?  A View is mythical entity that doesn't store any image.  Instead,  
it represents transformations and clipping that will be applied when you draw  
with focus locked on the View.  Those transformations are applied in order to  
generate bits that go to a window, which is a rectangular bitmap device.

The simple answer to your question is that Windows take storage, NXImages cache  
bitmaps in windows (and thus take storage), and Views are used to draw into  
windows but don't take storage.  (The answer is more complicated than this, but  
this is the fundamental concept)

-sam

--
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