Screen Private is X jargon for devPrivate (an array of values)
attached to a Screen data structure. These arrays
are sized dynamically at server startup and reset.
Each array is actually a union (DevUnion) of common
useful types (pointer, long and unsigned long).
Screen Privates contains data that is accessed by
several routines in the driver.
Since an X server may be driving many graphics adapters
during its execution, each physical screen is allocated a
Your driver hangs its own data structure
off the bottom of this structure.
The template graphics driver created with
xmkddx contains code to allocate and use
your driver's Screen Private.
The structure is allocated in the xxxInit.c file
and defined in the xxxDefs.h file,
which also includes a simple macro
that gives quick access to the driver's Screen Private.
As you write your driver,
feel free to add and remove data
from this structure according to your needs.
© 2005 The SCO Group, Inc. All rights reserved.
OpenServer 6 and UnixWare (SVR5) HDK - June 2005