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XPRESENT(3)		    Library Functions Manual		     XPRESENT(3)

NAME
     Xpresent - X Present Extension

SYNTAX
     #include <X11/extensions/Xpresent.h>

     Bool XPresentQueryExtension (Display *dpy, int *major_opcode_return,
	  int *event_base_return, int *error_base_return);

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

     int XPresentVersion (void);

ARGUMENTS
     dpy       Specifies the connection to the X server.

DESCRIPTION
     Xpresent  is  a library designed to interface the X Present Extension.  The
     Present extension provides a way for applications to  update  their  window
     contents  from  a	pixmap in a well defined fashion, synchronizing with the
     display refresh and potentially using a more efficient mechanism than copy-
     ing the contents of the source pixmap.  The XPresentQueryExtension function
     checks if the X server specified by dpy supports the X  Present  extension.
     If  the  server  does  not support the extension, it returns False.  If the
     server does support the extension, it returns True, and sets the values  of
     major_opcode_return, event_base_return, and error_base_return if the point-
     ers are not NULL.

     Clients  must call the XPresentQueryExtension function to verify the server
     supports the extension before calling any other function  for  this  exten-
     sion.   The XPresentQueryVersion function sets the values pointed to by ma-
     jor_version_return and minor_version_return to the version of the extension
     supported by the X server specified by dpy.  The XPresentQueryVersion func-
     tion returns the version of the libXpresent library in use, as  defined  by
     the PRESENT_VERSION macro in <X11/extensions/Xpresent.h>.

SEE ALSO
     XPresentNotifyMSC(3),  XPresentPixmap(3), XPresentQueryCapabilities(3), XP-
     resentSelectInput(3)

RESTRICTIONS
     Xpresent will remain upward compatible after the 1.0 release.

AUTHORS
     Keith Packard, Intel

X Version 11			libXpresent 1.0.1		     XPRESENT(3)

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