17.1 Kind of graphics servers


The basic idea behind the scene is that there is only one program (the server) permanently active which knows how to plot in a device-dependent manner, and that all user plotting commands (the clients) just communicate with the server via a communication channel using a limited set of standard (binary) commands corresponding to graphics primitives.


There are two main flavours of servers currently available in XAS, each of which may exist in several instances.

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