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Therefore there are two possibilities to configure pdftops at
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1. Selection of the renderer: Ghostscript, Poppler, or Adobe Reader
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1. Selection of the renderer: Ghostscript, Poppler, pdftocairo, or
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Ghostscript has better color management and is generally optimized
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more for printing. Poppler produces a PostScript which is
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compatible with more buggy built-in PostScript interpreters of
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printers and it leads to a somewhat quicker workflow when
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graphical structures of the input PDF has to be turned into
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bitmaps. Adobe Reader is the PDF renderer from Adobe, the ones
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who created PDF and PostScript.
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bitmaps. Adobe Reader is the PDF renderer from Adobe, the ones who
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created PDF and PostScript. pdftocairo is a good choice for the
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PDF output of Cairo (for example when printing from evince). It
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is less resource-consuming when rasterizing graphical elements
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which cannot be represented in PostScript (like
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transparency). Note that pdftocairo only supports PDF input using
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DeviceRGB, DeviceGray, RGB or sGray and is not capable of
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generating PostScript level 1. So its support is only experimental
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and distributions should not choose it as default.
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The selection is done by the "pdftops-renderer" option, setting it
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to "gs", "pdftops", or "acroread":
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to "gs", "pdftops", "pdftocairo", "acroread", or "hybrid":
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Per-job: lpr -o pdftops-renderer=pdftops ...
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Per-queue default: lpadmin -p printer -o pdftops-renderer-default=gs
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By default, pdftops uses Ghostscript if this does not get changed
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at compile time, for example by the Linux distribution vendor.
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Hybrid means Ghostscript for most printers, but Poppler's pdftops
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for Brother, Minolta, and Konica Minolta. Printer make and model
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information comes from the PPD or via the "make-and-model" option.
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2. Limitation of the image rendering resolution
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If graphical structures of the incoming PDF file have to be
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For maximum security cups-browsed uses IPPS (encrypted IPP)
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whenever possible.
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In addition, cups-browsed is also capable of discovering IPP
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network printers (native printers, not CUPS queues) with known
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page description languages (PWG Raster, PDF, PostScript, PCL XL,
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PCL 5c/e) in the local network and auto-create PPD-less print
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queues for them (using a System V interface script to control the
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filter chain). Clients have to IPP-poll the capabilities of the
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printer and send option settings as standard IPP attributes. We do
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not poll the capabilities by ourselves to not wake up the printer
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from power-saving mode when creating the queues. Jobs have to be
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sent in PDF format. Other formats are not accepted. This
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functionality is primarily for mobile devices running CUPS to not
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need a printer setup tool nor a collection of printer drivers and
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cups-browsed can also be started on-demand, for example to save
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resources on mobile devices. For this, cups-browsed can be set
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into an auto shutdown mode so that it stops automatically when it
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has no remote printers to take care of any more, especially if an
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on-demand running avahi-daemon stops. Note that CUPS must stay
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running for cups-browsed removing its queues and so being able to
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shut down. Ideal is if CUPS stays running another 30 seconds after
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finishing its last job so that cups-browsed can take down the
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queue. For how to set up and control this mode via command line,
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configuration directives, or sending signals see the man pages
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cups-browsed(8) and cups-browsed.conf(5).
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The configuration file for cups-browsed is
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/etc/cups/cups-browsed.conf. This file can include limited forms
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of the original CUPS BrowseRemoteProtocols, BrowseLocalProtocols,
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BrowsePoll, and BrowseAllow directives.
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BrowsePoll, and BrowseAllow directives. It also can contain the
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new CreateIPPPrinterQueues to activate discovering of IPP network
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printers and creating PPD-less queues for them.
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Note that cups-browsed does not work with remote CUPS servers
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specified by a client.conf file. It always connects to the local
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CUPS daemon by setting the CUPS_SERVER environment variable and so
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overriding client.conf. If your local CUPS daemon uses a
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non-standard domain socket as only way of access, you need to
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specify it via the DomainSocket directive in
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/etc/cups/cups-browsed.conf.
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The "make install" process installs init scripts which make the
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daemon automatically started during boot. You can also manually
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queue set as system default, to not loose its system default
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Here is some info on how cups-browsed works internally )first concept of a
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On systems using systemd use a
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/usr/lib/systemd/system/cups-browsed.service file like this:
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Description=Make remote CUPS printers available locally
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After=cups.service avahi-daemon.service
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Wants=cups.service avahi-daemon.service
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ExecStart=/usr/sbin/cups-browsed
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WantedBy=multi-user.target
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On systems using Upstart use an /etc/init/cups-browsed.conf file like this:
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and (started cups or runlevel [2345]))
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stop on runlevel [016]
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[ -x /usr/sbin/cups-browsed ]
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exec /usr/sbin/cups-browsed
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These files are included in the source distribution as
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utils/cups-browsed.service and utils/cups-browsed-upstart.conf.
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In the examples we start cups-browsed after starting
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avahi-daemon. This is not required. if cups-browsed starts first,
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the Bonjour/DNS-SD browsing kicks in as soon as avahi-daemon comes
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up. cups-browsed is also robust against any shutdown and restart
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Here is some info on how cups-browsed works internally (first concept of a
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daemon which does only Bonjour browsing):
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inject. They must be injecting JCL code ("*JCLOpenUI:
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... ... *JCLCloseUI: ...").
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A sample PPD file, HP-Color_LaserJet_CM3530_MFP-PDF.ppd is included.
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Sample PPD files are included:
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- Fuji_Xerox-DocuPrint_CM305_df-PDF.ppd
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- Generic-PDF_Printer-PDF.ppd
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- HP-Color_LaserJet_CM3530_MFP-PDF.ppd
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If Collate is defined, "pdftopdf" judges the printer supports Collate.
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If cupsManualCopies is defined as False, "pdftopdf" judges the printer
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If cupsManualCopies is defined as True, "pdftopdf" judges the printer
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does not support Copies feature.
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If Duplex is defined, "pdftopdf" judges the printer supports Duplex.
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and NO "*cupsFilter:" line which accepts PostScript input.
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A sample PPD file for a native PDF printer,
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HP-Color_LaserJet_CM3530_MFP-PDF.ppd is included.
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Sample PPD file for native PDF printer are included:
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- Fuji_Xerox-DocuPrint_CM305_df-PDF.ppd
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- Generic-PDF_Printer-PDF.ppd
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- HP-Color_LaserJet_CM3530_MFP-PDF.ppd
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When a printer does not support PS nor PDF, you can use Ghostscript (GS).
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In this case, you can specify device options like a PS printer.
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