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.TH XpSetContext 3Xp "libXp 1.0.4" "X Version 11" "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)