Manual Pages for UNIX Operating System command usage for man XineramaQueryScreens

Misc. Reference Manual Pages                  XINERAMA(3xinerama)



NAME
     Xinerama - API for Xinerama extension to X11 Protocol

SYNOPSIS
     cc [ flag... ] file... -lXinerama [ library... ]
     #include 

     Bool XineramaQueryExtension (Display *dpy,
          int *event_base_return, int *error_base_return);

     Status XineramaQueryVersion (Display *dpy,
          int *major_version_return,
          int *minor_version_return);

     Bool XineramaIsActive (Display *dpy);

     XineramaScreenInfo * XineramaQueryScreens (Display *dpy,
          int *number);

ARGUMENTS
     display   Specifies the connection to the X server.

     event_base_return
               Specifies the return  location  for  the  assigned
               base event code

     error_base_return
               Specifies the return  location  for  the  assigned
               base error code

     major_version_return
               Returns the major version supported by the server

     minor_version_return
               Returns the minor version supported by the server

     number    Returns the number  of  entries  in  the  returned
               XineramaScreenInfo array.

DESCRIPTION
     Xinerama is a  simple  library  designed  to  interface  the
     Xinerama Extension for retrieving information about physical
     output devices which may be combined into a single logical X
     screen.


FUNCTIONS
  XineramaQueryExtension()
     The XineramaQueryExtension function queries the  Xserver  to
     determine the availability of the Xinerama Extension. If the
     extension is  available,  the  return  value  is  True,  and
     event_base_return  and error_base_return are set to the base



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Misc. Reference Manual Pages                  XINERAMA(3xinerama)



     event number  and  base  error  number  for  the  extension,
     respectively.  Otherwise, the return value is False, and the
     values of event_base_return and error_base_return are  unde-
     fined.



  XineramaQueryVersion()
     The XineramaQueryVersion function returns the version of the
     Xinerama  extension  implemented by the Xserver. The version
     is      returned      in      major_version_return       and
     minor_version_return.  The major version will be incremented
     for protocol incompatible changes,  and  the  minor  version
     will be incremented for small, upwardly compatible changes.

     If the Xinerama  library  is  compatible  with  the  version
     returned  by  the  server, it returns nonzero. If the server
     does not support the XINERAMA extension, or if there was  an
     error  during  communications  with  the  server,  or if the
     server and library protocol versions  are  incompatible,  it
     returns zero.



  XineramaIsActive()
     The XineramaIsActive function  returns  a  Boolean  operator
     used  to  determine  if Xinerama is activated on the screen.
     Returns True for active and False for not active.



  XineramaQueryScreens()
     The XineramaQueryScreens() function returns info about  each
     individual  output  device  within the Xinerama Screen.  The
     integer pointed to by the number argument is updated to  the
     number  of  output  devices  listed in the returned array of
     XineramaScreenInfo    structures.     XineramaQueryScreens()
     returns NULL and sets number to 0 if Xinerama is not active.

     The   pointer   returned    should    be    released    with
     XFree(3xinerama) when no longer needed.



NOTE
     The original API provided for interacting with the  XINERAMA
     extension  used  function  names  beginning with XPanoramiX.
     That API is now deprecated  and  this  API  should  be  used
     instead in new software.






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ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | x11/library/libxinerama     |
    |_____________________________|_____________________________|
    | Interface Stability         | Uncommitted                 |
    |_____________________________|_____________________________|
    | MT-Level                    | See XInitThreads(3X11)      |
    |_____________________________|_____________________________|










































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