xpsetcontext(3xp) [suse man page]
XpSetContext(3Xp) XPRINT FUNCTIONS XpSetContext(3Xp) NAME
XpSetContext - Sets or unsets a print context with the specified display connection to the X Print Server. SYNOPSIS
cc [ flag... ] file... -lXp [ library... ] #include <X11/extensions/Print.h> void XpSetContext ( display, print_context ) Display *display; XPContext print_context; ARGUMENTS
display Specifies a pointer to the Display structure; returned from XOpenDisplay. print_context A pre-existing print context on the same X Server. DESCRIPTION
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 XpDe- stroyContext 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 pre- viously 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 typi- cally 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 List- Fonts 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. DIAGNOSTICS
XPBadContext A valid print context-id has not been set prior to making this call. SEE ALSO
XpDestroyContext(3Xp), XpStartJob(3Xp) X Version 11 libXp 1.0.0 XpSetContext(3Xp)
Check Out this Related Man Page
XpCreateContext(3Xp) XPRINT FUNCTIONS XpCreateContext(3Xp) NAME
XpCreateContext - Creates and initializes a new print context. SYNOPSIS
cc [ flag... ] file... -lXp [ library... ] #include <X11/extensions/Print.h> XPContext XpCreateContext ( display, printer_name ) Display *display; char *printer_name; ARGUMENTS
display Specifies a pointer to the Display structure; returned from XOpenDisplay. printer_name The name of a printer on display. String encoded as COMPOUND_TEXT. DESCRIPTION
XpCreateContext creates a new print context that is initialized with the default printer attributes and other information available for printer_name on display. A print context maintains the printer name, print attributes, font capabilities, print (rendering) state and results, and is the object upon which the Xp calls act. If the library fails to generate a new print context-id, a value of None is returned, otherwise a print context-id is always returned. If printer_name is invalid, a BadMatch is generated later by the X Print Server. A call to XpGetPrinterList will return a valid list of values for printer_name. All printer name values in the X Print Service are encoded as COMPOUND_TEXT (of which the ISO-8859-1 code-set is a proper subset). As soon as a print context is created, the print attributes in it can be accessed and modified by calling XpGetAttributes and XpSetAt- tributes, and the event selections in it can be modified by calling XpSelectInput and XpInputSelected. Other Xp calls that explicitly take a print context-id as a parameter will operate directly on that print context. All Xp and X calls without a print context-id parameter (for example, all rendering oriented calls like XpStartJob and XDrawLine) require that a print context be set on the display connection (see XpSetContext). Failure to set a print context prior to calling a print-context-dependent call will result in the generation of an XPBadCon- text error. The XPContext returned by XpCreateContext is an XID, and can be used to set the print context on display connections by calling XpSetCon- text. The XPContext id can be shared between processes and display connections. It is the responsibility of the clients sharing a print context to coordinate their usage of the context; for example they must ensure that in-use print contexts are not prematurely destroyed. The context_id remains valid for all clients until 1) the client creating the print context closes its display connection, or 2) any client calls XpDestroyContext. The context_id can be kept valid after the creating client's display connection closes if XSetCloseDownMode is called on display with RetainPermanent or RetainTemporary. After creating a print context, and possibly modifying the XPDocAttr attribute document-format using a value from the list of available formats shown in the XPPrinterAttr attribute document-formats-supported, the application must query the X Print Server via XpGetScreenOf- Context for the screen that has been associated with the print context, and then create all server resources that will be used in the print job on that screen. Failure to do so will result in undefined behavior. When XpCreateContext is called, the client's locale (see XpSetLocaleHinter) is included in the request as a "hint" to the X Print Server. If supported by the implementation, the X Print Server will use the hint to initialize the attribute pools with any localized attribute values (for example, the human readable XPPrinterAttr attribute "descriptor" may be available in several different languages, and the hint will be used to select one). If the X Print Server cannot understand the hint, the X Print Server chooses a default value. This function can generate a BadMatch error if the specified printer_name does not exist on display, or if the print server could not interpret the code set specified in printer_name. DIAGNOSTICS
BadMatch The value specified for doc_fmt is not valid for the current document type or the value specified for drawable is not valid for the print context and print screen. SEE ALSO
XpDestroyContext(3Xp), XpGetAttributes(3Xp), XpGetPrinterList(3Xp), XpGetScreenOfContext(3Xp), XpInputSelected(3Xp), XpSelectInput(3Xp), XpSetAttributes(3Xp), XpSetContext(3Xp), XpSetLocaleHinter(3Xp), XpStartJob(3Xp) X Version 11 libXp 1.0.0 XpCreateContext(3Xp)