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.TH XpSetContext 3Xp __xorgversion__ "XPRINT FUNCTIONS"
.SH NAME
XpSetContext \-  Sets or unsets a print context with the specified display 
connection to the X Print Server.
.SH SYNOPSIS
.br
      cc [ flag... ] file... -lXp [ library... ]	
.br
      #include <X11/extensions/Print.h>
.LP    
.B void XpSetContext
(
.I display,
.I print_context
)
.br
      Display *\fIdisplay\fP\^;
.br
      XPContext \fIprint_context\fP\^;
.if n .ti +5n
.if t .ti +.5i
.SH ARGUMENTS
.TP
.I display
Specifies a pointer to the Display structure; returned from XOpenDisplay.
.TP
.I print_context
A pre-existing print context on the same X Server.
.SH DESCRIPTION
.LP
XpSetContext sets the print context for a display connection. All subsequent 
print operations that do not explicitly take a print context-id (for example, 
XpStartJob) on display will use and act upon the print context set by this call, 
until the print context is unset or XpDestroyContext is called. The print 
context can be set and used on multiple jobs, if not destroyed.

If 
.I print_context 
is None, XpSetContext will unset (disassociate) the print 
context previously associated with display. If there was no previously 
associated print context, no action is taken. The content of the formerly 
associated print context is not affected by this call, and other display 
connections may continue to use the print context.

Since font capabilities can vary from printer to printer, XpSetContext may 
modify the list of available fonts (see XListFonts) on display, and the actual 
set of usable fonts (see XLoadFont). A unique combination of fonts may be 
available from within a given print context; a client should not assume that all 
the fonts available when no print context is set will be available when a print 
context is set.

When a print context is set on a display connection, the default behavior of 
ListFonts and ListFontsWithInfo is to list all of the fonts normally associated 
with the X print server (i.e. fonts containing glyphs) as well as any internal 
printer fonts defined for the printer. The xp-listfonts-modes attribute is 
provided so that applications can control the behavior of ListFonts and 
ListFontsWithInfo and is typically used to show just internal printer fonts. 
Using only internal printer fonts is useful for performance reasons; the glyphs 
associated with the font are contained within the printer and do not have to be 
downloaded.

If the value of xp-listfonts-modes includes xp-list-glyph-fonts, ListFonts and 
ListFontsWithInfo will include all of the fonts available to the server that 
have glyphs associated with them. If the value of xp-listfonts-modes includes 
xp-list-internal-printer-fonts, then ListFonts and ListFontsWithInfo will 
include all of the fonts defined as internal printer fonts.

When the print context is unset or XpDestroyContext is called, the available 
fonts on display revert back to what they were previously.
.SH DIAGNOSTICS
.TP 15
.SM XPBadContext
A valid print context-id has not been set prior to making this call.
.SH "SEE ALSO"
.BR XpDestroyContext (3Xp),
.BR XpStartJob (3Xp)