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    b
     
    
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        backing store
      
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        When a server maintains the contents of a window, the off-screen 
        saved pixels are known as a backing store.
      
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        before action
      
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        An action of a contact-display that is called when an event is 
        dispatched to a contact, but before any other contact input 
        processing is performed.
      
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        bit gravity
      
- 
        When a window is resized, the contents of the window are not 
        necessarily discarded. It is possible to request the server to 
        relocate the previous contents to some region of the window. This 
        attraction of window contents for some location of a window is known 
        as bit gravity.
      
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        bitmap
      
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        A pixmap of depth one.
      
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        button grabbing
      
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        Buttons on the pointer can be passively grabbed by a client. 
        When the button is pressed, the pointer is then actively grabbed by 
        the client.
      
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        byte order
      
- 
        For image (pixmap/bitmap) data, byte order is defined by the server, 
        and clients with different native byte ordering must swap bytes as 
        necessary. For all other parts of the protocol, the byte order is 
        defined by the client, and the server swaps bytes as necessary.
    
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    Gilbert Baumann.
    
    Last build: Tue Dec 16 23:30:42 1997