home *** CD-ROM | disk | FTP | other *** search
- DOCUMENT:Q104902 06-OCT-1993 [W_NT]
- TITLE :Print Processors and Data Types
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- --------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system version 3.1
- - Microsoft Windows NT Advanced Server version 3.1
- -------------------------------------------------------------------
-
- SUMMARY
- =======
-
- Windows NT and Windows NT Advanced Server both use print processors as
- part of the overall printing procedure. The main function of a print
- processor is to interpret what type of data is being passed from the
- spooler to the graphics engine. Windows NT includes WINPRINT.DLL as
- its only one print processor, which can interpret journal and raw data
- types.
-
- MORE INFORMATION
- ================
-
- Journal files are collections of Device Driver Interface (DDI) calls,
- which are precise commands specific to a particular hardware device.
- For example, a journal file created for a 150 dot-per-inch (dpi)
- LaserJet printer would not print properly on a 300 dpi LaserJet
- printer. Journal files can also contain TrueType font outline
- information, thus the destination printer need not have a particular
- font installed to render the print job. Journal files are processed,
- passed back to the spooler for routing to the graphics engine
- (GDI32.DLL), and then passed to the printer driver and finally sent to
- the output device.
-
- Raw files need no processing from the print processor; they are handed
- to the spooler for routing to the graphics engine. An example of a raw
- data type is an encapsulated PostScript (.EPS) file because it needs
- no print processor interpretation or conversion.
-
- Windows NT Advanced Server adds another print processor to the system:
- SFMPSPRT.DLL. This print processor interprets PostScript information
- passed from a Macintosh client and translates it to specific DDI
- commands that the Windows NT printer drivers can interpret.
- SFMPSPRT.DLL supports the PSCRIPT1 data type, which allows Macintosh
- clients to print PostScript files to raster printers.
-
- Though its main job is to interpret compatible data types, the print
- processor also provides access to the printing process. You can modify
- the printing process by substituting a custom program in place of the
- Windows NT default print processor. A print processor could be used to
- filter data, to create a special dialog with the printer device, or to
- interpret a new data type. For example, you might have a print
- processor that filters ASCII for use on a PostScript printer.
-
- Additional reference words: 3.10
- KBCategory:
- KBSubCategory: prt
-
- =============================================================================
-
- THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
- PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS
- ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO
- EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
- ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
- CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
- MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION
- OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
- SO THE FOREGOING LIMITATION MAY NOT APPLY.
-
- Copyright Microsoft Corporation 1993.