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NAME

       XCreateOC, XDestroyOC, XSetOCValues, XGetOCValues, XOMOfOC - create output contexts

SYNTAX

       XOC XCreateOC(XOM om);

       void XDestroyOC(XOC oc);

       char * XSetOCValues(XOC oc, ...);

       char * XGetOCValues(XOC oc, ...);

       XOM XOMOfOC(XOC oc);

ARGUMENTS

       oc        Specifies the output context.

       om        Specifies the output method.

       ...       Specifies the variable length argument list to set or get XOC values.

DESCRIPTION

       The XCreateOC function creates an output context within the specified output method.

       The  base  font  names argument is mandatory at creation time, and the output context will
       not be created unless it is provided.  All other output context values can be set later.

       XCreateOC returns NULL if no output context could be created.  NULL can  be  returned  for
       any of the following reasons:

       ·    A required argument was not set.

       ·    A read-only argument was set.

       ·    An argument name is not recognized.

       ·    The output method encountered an output method implementation-dependent error.

       The XDestroyOC function destroys the specified output context.

       The  XSetOCValues  function  returns  NULL if no error occurred; otherwise, it returns the
       name of the first argument that could not be set.  An argument might not be set for any of
       the following reasons:

       ·    The argument is read-only.

       ·    The argument name is not recognized.

       ·    An implementation-dependent error occurs.

       Each  value  to be set must be an appropriate datum, matching the data type imposed by the
       semantics of the argument.

       The XGetOCValues function returns NULL if no error occurred;  otherwise,  it  returns  the
       name  of the first argument that could not be obtained.  An argument might not be obtained
       for any of the following reasons:

       ·    The argument name is not recognized.

       ·    An implementation-dependent error occurs.

       Each argument value following a name must point to a location where the  value  is  to  be
       stored.

       The  XOMOfOC  function  returns  the  output  method  associated with the specified output
       context.

SEE ALSO

       XCreateOM(3), XCreateFontSet(3)
       Xlib - C Language X Interface