XpSetContext - Sets or unsets a print context with the specified
display connection to the X Print Server.
cc [ flag... ] file... -lXp [ library... ]
void XpSetContext ( display, print_context )
Specifies a pointer to the Display structure; returned from
A pre-existing print context on the same X Server.
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 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.
XPBadContext A valid print context-id has not been set prior to
making this call.