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IJSGIMPPRINT(1) 		     Gimp-Print Manual Pages			  IJSGIMPPRINT(1)

       ijsgimpprint - Ghostscript driver for Gimp-Print

       gs  -sDEVICE=ijs  -sIjsServer=/usr/bin/ijsgimpprint  -sDeviceManufacturer=vendor -sDevice-
       Model=name [ -dIjsUseOutputFD ] -sIjsParams=[ key1=value1,keyn=valuen... ] [ options  ]	[
       files ]

       ijsgimpprint  provides  Ghostscript with a Gimp-Print driver, supporting all printers sup-
       ported by libgimpprint.

       IJS is an initiative to improve the quality and ease of use of printing with  Ghostscript.
       It  permits  adding  or	upgrading drivers without recompiling Ghostscript.  An IJS driver
       runs in a separate process that communicates with Ghostscript via  an  IPC  channel.   The
       Gimp-Print IJS driver may be used with AFPL Ghostscript, as it runs in a separate process.

       The options for this driver are very complex.  We strongly recommend use of a printer man-
       agement system such as Foomatic rather than  configuring  a  spooler  manually  with  this
       driver.	The driver name used by Foomatic is gimp-print-ijs.

       ijsgimpprint accepts the following options:

   Ghostscript IJS options
	      This  option should be specified whenever output from Ghostscript will go to stdout
	      or into a pipe.  It may be specified in all other cases, with only a slight perfor-
	      mance degradation.

	      This  parameter  contains a single string containing a comma-separated list of sub-

       -sDeviceManufacturer=vendor -sDeviceModel=name
	      This option must be supplied.  There is no default.  The IJS  driver  requires  the
	      vendor  (it's  part  of  the protocol), but the ijsgimpprint driver ignores it.  It
	      should be CANON, EPSON, LEXMARK, or HEWLETT-PACKARD.  The value  of  the	-sDevice-
	      Model  parameter	is  the same as the value of the -sModel parameter in the old stp

	      A complete list of supported printers may be found in gimpprint-models(7).

	      Most or all of the Epson Stylus printers are fully functional.   The  others  vary.
	      In  particular, all of the listed Epson Stylus Photo printers print in full 6-color
	      photo mode; most of the others do not.  The color output has also been better tuned
	      for Epson Stylus printers than for others.

   Gimp-Print IJS options
       These  options  are all used in the -sIjsParams options, except where mentioned otherwise.
       Due to their complicated nature, the options are explained in detail  in  their	own  sec-

	      The  meaning  of this is model-specific.	Two names are listed for each resolution;
	      the first (short) name is the quality that must be passed to Quality, and the  sec-
	      ond  (long)  name is descriptive.  Each printer has its own default value; for most
	      printers, this is a reasonable 300 or 360 DPI resolution.  A full list of available
	      resolutions for each printer may be found in gimpprint-resolutions(7).


       This  is  printer  type	specific.   The  option names are case sensitive.  A full list of
       available media types may be found in gimmprint-inktypes(7).


       This is printer type specific.  The option names are  case  sensitive.	A  full  list  of
       available media types may be found in gimpprint-mediatypes(7).


       This  is  printer  type	specific.   The  option names are case sensitive.  A full list of
       available media sources may be found in gimpprint-mediasources(7).

	      for known Ghostscript paper sizes.

	      where x and y are the width  and	height	of  the  paper	respectively,  in  points
	      (1/72").	Note this is a normal gs option, not an IJS option.

       This  is  printer-specific;  we cannot list the correct values for each printer here.  The
       option names are case-sensitive.  Two names are listed  for  each  resolution;  the  first
       (short)	name  is the value that must be passed to -sPAPERSIZE, and the second (long) name
       is descriptive.	This option does not set GhostScript up to use a paper	size  other  than
       the  default;  it  only tells the driver to set up the printer for a different paper size.
       The default paper size is "Letter".

       A complete list of available paper sizes may be found in gimpprint-mediasizes(7).









       A full description of the color balancing options, including the allowed ranges of values,
       may be found in gimpprint-color(7).

	      Possible values for algorithm may be found in gimpprint-dithers(7).

       -sProcessColorModel=DeviceGray -dBitsPerSample=1
	      Black and white


	      Color (RGB)

	      Color (CMYK)

       Note  these  are  gs  options, not IJS options.	Choose color vs. grayscale output.  Color
       output is the default.  Choosing DeviceGrey and -dBitsPerSample=1 results  in  only  black
       ink  (no  color	ink) being used, which is faster and usually results in the most accurate
       grayscale, but at the expense of smoothness.  This prints only black and white (threshold-
       ing).   This  option always uses Fast dithering unless you specify Very Fast.  If you want
       composite color (using a mixture of color and black inks to produce gray), use DeviceGrey.

       In addition, using DeviceGrey uses luminance (perceived brightness)  of	red,  green,  and
       blue  to  choose  output levels.  Blue of a given intensity is perceived to be much darker
       than red, which in turn appears darker than  green.   DeviceRGB,  DeviceCYMK  and  Satura-
       tion=0.0 (see "Saturation" above) do not use luminance.

       CMYK  output may be used with the IJS driver only.  It is useful if you're printing a CMYK
       graphic and want explicit control over the inks.  Generally it yields inferior quality, as
       Gimp-Print has good algorithms for converting RGB (screen) into CMYK (inks) that take into
       account paper type, ink type, and other variables.  In CMYK  mode,  the	brightness,  con-
       trast, and saturation controls do not function.

       This option can be used to optimize the dither.

	      Possible values are:

	      Value   Description
	      1       Line art (color or gray scale)
	      2       Primarily  solid colors or smooth gradi-
		      ents (color or gray scale)
	      3       Continuous-tone  photographs  (color  or
		      gray scale)

	      Option  0 is the fastest.  It generates strong, but not particularly accurate, col-
	      ors.  There may be some fairly sharp color transitions in this mode.

	      Option 1 generates more accurate colors, but is slower.

	      Option 2 generates the most accurate colors, but is considerably slower.

       Note that any of the modes may be used with either color or  black  &  white  output.   If
       black  and  white  output  is  requested,  but  a color mode used, composite color will be
       printed.  This generally offers smoother tone, but less purity of gray or black, than pure
       black  ink.   Furthermore, it is possible to tune the color of the gray (to achieve warmer
       or cooler effects) using the color controls in this fashion.

       Specifying a lower GhostScript resolution (with -r) results in  faster  color  conversion.
       For example, if you print at 1440x720 DPI, but specify a Ghostscript resolution of 360 DPI
       (with -r360), output will be significantly faster and there will be much  less  difference
       in performance between the three image type options.

       Note  that a lot of these options are used for demonstration; generally adjusting the den-
       sity is a bad idea!

   Example 1
       Print charts to file, using A4 paper, color, 360 dpi:

	      gs -sDEVICE=ijs -sIjsServer=/usr/bin/ijsgimpprint
	      -sDeviceManufacturer=EPSON -sDeviceModel=escp2-ex -sPAPERSIZE=a4

   Example 2
       Print color photograph to /dev/lp0 at maximum quality:

	      gs -sDEVICE=ijs -sIjsServer=/usr/bin/ijsgimpprint
	      -sDeviceManufacturer=EPSON -sDeviceModel=escp2-870

   Example 3
       Print pure black text to stdout:

	      gs -sDEVICE=ijs -sIjsServer=/usr/bin/ijsgimpprint
	      -sDeviceManufacturer=EPSON -sDeviceModel=escp2-660 -dIjsUseOutputFD
	      -sProcessColorModel=DeviceGray -dBitsPerSample=1 -sOutputFile=-
	      -sIjsParams='Quality=720sw,Density=0.8' foo.ps

       The Ghostscript stp driver was originally written by Henryk Richter (buggs@comlab.uni-ros-
       tock.de),  and  was  integrated	into Gimp-Print during the 3.1 development series.  Gimp-
       Print itself was originally written by Michael Sweet <mike@easysw.com>, who released up to
       version	2.0;  Robert  Krawitz  released  version  3.0.	 The  gimp-print development team
       (http://gimp-print.sourceforge.net) now maintains the entire package.

       The IJS driver was originally written by Russell Lang, and incorporated into Gimp-Print in
       early 2002.  This driver corresponds with the IJS protocol 0.32.

       Copyright (C)  2001-2002 Robert Krawitz (rlk@alum.mit.edu)

       This program is free software; you can redistribute it and/or modify it under the terms of
       the GNU General Public License as published by the Free Software Foundation;  either  ver-
       sion 2 of the License, or (at your option) any later version.

       This  program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
       without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE.
       See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program;
       if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,  Boston,
       MA 02111-1307, USA.

       Robert Krawitz.	Originally written by Russell Lang.

       This  manual  page  was	written  by  Robert  Krawitz  (rlk@alum.mit.edu)  and Roger Leigh

       gs(1), gimpprint-color(7), gimpprint-dithers(7),  gimpprint-inktypes(7),  gimpprint-media-
       sizes(7),  gimpprint-mediasources(7),  gimpprint-mediatypes(7), gimpprint-models(7), gimp-

Version 4.2.4				   25 Nov 2002				  IJSGIMPPRINT(1)
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