Printing

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ReactOS Trunk has first Printing Support since the "colins-printing-for-freedom" branch has been merged in r73039 on October 26, 2016.

This page shall track all involved components, their current status and the next steps that need to be done. Many components still need research, so your help is welcome!

Contacts

Current Status and Roadmap

Base Components
winspool.drv

Provides all Printer APIs to the application world
Symbol support vote.png Implements OpenPrinter, StartDocPrinter, StartPagePrinter, WritePrinter, EndPagePrinter, EndDocPrinter, ClosePrinter to send RAW data to the printer
Symbol support vote.png Implements EnumPrinters for enumerating printers
Symbol support vote.png Implements AddJob, GetJob, EnumJobs for handling print jobs of a printer
Symbol support vote.png Implements EnumPorts for enumerating the available printer ports
Symbol support vote.png Implements EnumMonitors for enumerating the available port monitors
Symbol support vote.png Implements EnumPrintProcessorDatatypes for enumerating the datatypes of a Print Processor associated to a Printer
Symbol support vote.png Implements getting and setting the default printer (GetDefaultPrinter/SetDefaultPrinter)
Symbol support vote.png Implements support for storing and getting additional printer data (GetPrinterData(Ex), SetPrinterData(Ex))
Symbol oppose vote.png Needs fully working GetPrinter/SetPrinter implementation for altering a printer's parameters
Symbol oppose vote.png Needs support for adding and deleting Printer Drivers (AddPrinterDriver(Ex), DeletePrinterDriver(Ex))
Symbol oppose vote.png Needs support for handling forms (aka paper sizes, AddForm, DeleteForm, EnumForms)
Symbol oppose vote.png Needs support for managing ports (AddPort(Ex), DeletePort, SetPort)
Symbol oppose vote.png Needs an implementation of the DocumentProperties API
Symbol oppose vote.png Needs support for adding and deleting connections to shared printers (AddPrinterConnection, DeletePrinterConnection)
Symbol oppose vote.png Needs support for Printer Change Notifications
Symbol oppose vote.png Needs all A functions implemented as counterparts to the W functions

spoolsv.exe

Central service that receives all printing requests from local and remote machines
Symbol support vote.png Listens on a local RPC link and forwards calls to spoolss.dll. Evolves together with the other components.
Symbol oppose vote.png Needs to listen for remote RPC calls on the network too and handle them appropriately.

spoolss.dll

Component used by spoolsv.exe to determine the Print Provider(s) that shall handle a call
Symbol support vote.png Forwards calls to one or multiple Print Providers. Evolves together with the other components.
Symbol support vote.png Provides helper APIs (like Marshall* and PackStrings) to assist the development of all Printing components.

Print Providers
localspl.dll

Manages all local printers and their queues. Most of the fun happens here!
Available WDK Samples: pp
This component evolves together with the other components and the ToDo list is mostly the same as for winspool.drv.

win32spl.dll

Calls a remote Spool Server to forward the calls to (Windows Printer Sharing)
Symbol oppose vote.png Entirely unimplemented

inetpp.dll

Handles TCP/IP Network Printers
Symbol oppose vote.png Entirely unimplemented

Print Monitors
localmon.dll

Manages the legacy local ports and the virtual FILE port
Available WDK Samples: localmon
Symbol support vote.png Fully implements support for COM, LPT and FILE ports
Symbol support vote.png The ReactOS implementation can be used as a drop-in replacement for the Windows counterpart
Symbol oppose vote.png Original Windows Local Port Monitor also implements support for IrDA Printers, but I don't think this has any priority

pjlmon.dll

Language Monitor for interpreting and acting according to the HP PJL (Printer Job Language)
Available WDK Samples: pjlmon
Symbol oppose vote.png Entirely unimplemented, not sure if still needed

tcpmon.dll

Manages IP-based ports for TCP/IP network printers
Symbol oppose vote.png Entirely unimplemented

usbmon.dll

Manages virtual USB001, USB002, etc. ports for USB printers
Symbol oppose vote.png Entirely unimplemented

Print Processors
winprint.dll

Alters the print job data to perform a datatype conversion to RAW or apply job-specific settings
Available WDK Samples: GenPrint / winprint (NT4 DDK)
Symbol support vote.png Supports the RAW datatype and forwards data without any modification.
Symbol oppose vote.png Needs to support TEXT and multiple versions of EMF.
Symbol oppose vote.png Needs to support Multiple Copies, Collation, Reverse Printing, Duplex Printing, and N-up Printing.

GDI DDI Printer Drivers
pscript5.dll
ps5ui.dll

Implements a generic driver for PostScript printers and serves as the base for every PDF Printer out there
Available WDK Samples: psprint (NT4 DDK only!)
WINE also has a "wineps.drv", but it is based on a WINE-proprietary interface
Symbol oppose vote.png Entirely unimplemented

unidrv.dll
unidrvui.dll

Implements the User-Mode v3 Printer Driver Model, used by every such driver to assist converting GDI calls to the printer language
Symbol oppose vote.png Entirely unimplemented

tty.dll
ttyui.dll

Implements the Generic / Text-Only Printer Driver
Available WDK Samples: tty, msplot
Symbol oppose vote.png Entirely unimplemented

WDM Printer Drivers
usbprint.sys

Implements the generic USB Printer Class for sending data to all USB-connected Printers
Symbol oppose vote.png Entirely unimplemented

Setup
ntprint.dll
ntprint.exe

Used for installing the Printer Driver Class
Symbol oppose vote.png Entirely unimplemented

UI Components
compstui.dll

I still have to figure out how important these components are. They obviously contain UI elements :)

printui.dll
printui.exe

I still have to figure out how important these components are. They obviously contain UI elements :)

GDI / Win32k Parts
 ?

GDI-based Printing functions like StartDoc and Printer DCs need to be supported. This still needs general investigation, which components are involved and what functions need to be implemented.

Resources