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X11R7.4 - man page for xpr (x11r4 section 1)

XPR(1)				     General Commands Manual				   XPR(1)

       xpr - print an X window dump

       xpr  [  -device	devtype  ]  [ -scale scale ] [ -height inches ] [ -width inches ] [ -left
       inches ] [ -top inches ] [ -header string ] [ -trailer string ] [ -landscape ] [ -portrait
       ] [ -plane number ] [ -gray ] [ -rv ] [ -compact ] [ -output filename ] [ -append filename
       ] [ -noff ] [ -split n ] [ -psfig ] [ -density dpi ] [ -cutoff level ] [ -noposition  ]	[
       -gamma correction ] [ -render algorithm ] [ -slide ] [ filename ]

       xpr  takes  as  input  a  window dump file produced by xwd(1) and formats it for output on
       PostScript printers, the Digital LN03 or LA100, the IBM PP3812 page printer, the HP Laser-
       Jet  (or other PCL printers), or the HP PaintJet.  If no file argument is given, the stan-
       dard input is used.  By default, xpr prints the largest	possible  representation  of  the
       window  on  the	output page.  Options allow the user to add headers and trailers, specify
       margins, adjust the scale and orientation, and append multiple window dumps  to	a  single
       output file.  Output is to standard output unless -output is specified.

       Command Options

       -device devtype
	      Specifies the device on which the file will be printed.  Currently supported:
		   la100  Digital LA100
		   ljet   HP  LaserJet	series and other monochrome PCL devices such as ThinkJet,
			  QuietJet, RuggedWriter, HP2560 series, and HP2930 series printers
		   ln03   Digital LN03
		   pjet   HP PaintJet (color mode)
		   pjetxl HP HP PaintJet XL Color Graphics Printer (color mode)
		   pp	  IBM PP3812
		   ps	  PostScript printer

	      The default is PostScript.  -device lw (LaserWriter) is equivalent  to  -device  ps
	      and is provided only for backwards compatibility.

       -scale scale
	      Affects  the size of the window on the page.  The PostScript, LN03, and HP printers
	      are able to translate each bit in a window pixel map into a  grid  of  a	specified
	      size.   For example each bit might translate into a 3x3 grid.  This would be speci-
	      fied by -scale 3.  By default a window is printed with the largest scale that  will
	      fit onto the page for the specified orientation.

       -height inches
	      Specifies the maximum height of the page.

       -width inches
	      Specifies the maximum width of the page.

       -left inches
	      Specifies the left margin in inches.  Fractions are allowed.  By default the window
	      is centered in the page.

       -top inches
	      Specifies the top margin for the picture in inches.  Fractions are allowed.

       -header string
	      Specifies a header string to be printed above the window.

       -trailer string
	      Specifies a trailer string to be printed below the window.

	      Forces the window to printed in landscape mode.  By default  a  window  is  printed
	      such that its longest side follows the long side of the paper.

       -plane number
	      Specifies  which	bit  plane  to use in an image.  The default is to use the entire
	      image and map values into black and white based on color intensities.

       -gray  2 | 3 | 4
	      Uses a simple 2x2, 3x3, or 4x4 gray scale conversion on a color image, rather  than
	      mapping  to  strictly  black  and  white.  This doubles, triples, or quadruples the
	      effective width and height of the image.

	      Forces the window to be printed in portrait mode.  By default a window  is  printed
	      such that its longest side follows the long side of the paper.

       -rv    Forces the window to be printed in reverse video.

	      Uses  simple run-length encoding for compact representation of windows with lots of
	      white pixels.

       -output filename
	      Specifies an output file name.  If this option is not specified, standard output is

       -append filename
	      Specifies  a  filename  previously  produced  by	xpr  to which the window is to be

       -noff  When specified in conjunction with -append, the window will appear on the same page
	      as the previous window.

       -split n
	      This  option  allows  the user to split a window onto several pages.  This might be
	      necessary for very large windows that would otherwise cause the printer to overload
	      and print the page in an obscure manner.

       -psfig Suppress translation of the PostScript picture to the center of the page.

       -density dpi
	      Indicates what dot-per-inch density should be used by the HP printer.

       -cutoff level
	      Changes  the  intensity  level where colors are mapped to either black or white for
	      monochrome output on a LaserJet printer.	The level is expressed as  percentage  of
	      full brightness.	Fractions are allowed.

	      This  option causes header, trailer, and image positioning command generation to be
	      bypassed for LaserJet, PaintJet and PaintJet XL printers.

       -gamma correction
	      This changes the intensity of the colors printed by PaintJet XL printer.	The  cor-
	      rection  is  a  floating point value in the range 0.00 to 3.00.  Consult the opera-
	      tor's manual to determine the correct value for the specific printer.

       -render algorithm
	      This allows PaintJet XL printer to render the image with the  best  quality  versus
	      performance  tradeoff.  Consult the operator's manual to determine which algorithms
	      are available.

       -slide This option allows overhead transparencies to be printed	using  the  PaintJet  and
	      PaintJet XL printers.

       xwd(1), xwud(1), X(1)

       The current version of xpr can generally print out on the LN03 most X windows that are not
       larger than two-thirds of the screen.  For example, it will be able to print out  a  large
       Emacs  window,  but  it will usually fail when trying to print out the entire screen.  The
       LN03 has memory limitations that can cause it to incorrectly print very large  or  complex
       windows.   The two most common errors encountered are ``band too complex'' and ``page mem-
       ory exceeded.''	In the first case, a window may have a particular six pixel row that con-
       tains  too  many  changes  (from black to white to black).  This will cause the printer to
       drop part of the line and possibly parts of the rest of the page.  The printer will  flash
       the  number  `1' on its front panel when this problem occurs.  A possible solution to this
       problem is to increase the scale of the picture, or to split the picture onto two or  more
       pages.	The  second problem, ``page memory exceeded,'' will occur if the picture contains
       too much black, or if the picture contains complex half-tones such as the background color
       of  a  display.	When this problem occurs the printer will automatically split the picture
       into two or more pages.	It may flash the number `5' on its from panel.	There is no  easy
       solution  to  this  problem.  It will probably be necessary to either cut and paste, or to
       rework the application to produce a less complex picture.

       There are several limitations on the LA100 support: the picture will always be printed  in
       portrait mode, there is no scaling, and the aspect ratio will be slightly off.

       Support	for  PostScript  output  currently  cannot  handle  the  -append, -noff or -split

       The -compact option is only supported for PostScript output.  It  compresses  white  space
       but not black space, so it is not useful for reverse-video windows.

       For color images, should map directly to PostScript image support.

       If no -density is specified on the command line 300 dots per inch will be assumed for ljet
       and 90 dots per inch for pjet.  Allowable density values for a LaserJet printer	are  300,
       150, 100, and 75 dots per inch.	Consult the operator's manual to determine densities sup-
       ported by other printers.

       If no -scale is specified the image will be expanded to fit the printable page area.

       The default printable page area is 8x10.5 inches. Other paper sizes  can  be  accommodated
       using the -height and -width options.

       Note  that a 1024x768 image fits the default printable area when processed at 100 dpi with
       scale=1, the same image can also be printed using 300 dpi with scale=3  but  will  require
       considerably more data be transferred to the printer.

       xpr  may  be  tailored  for  use with monochrome PCL printers other than the LaserJet.  To
       print on a ThinkJet (HP2225A) xpr could be invoked as:

	   xpr -density 96 -width 6.667 filename

       or for black-and-white output to a PaintJet:

	   xpr -density 180 filename

       The monochrome intensity of a pixel is computed as 0.30*R + 0.59*G + 0.11*B.  If a pixel's
       computed  intensity  is	less  than  the  -cutoff level it will print as white.	This maps
       light-on-dark display images to black-on-white hardcopy.  The default cutoff intensity  is
       50%  of full brightness.  Example: specifying -cutoff 87.5 moves the white/black intensity
       point to 87.5% of full brightness.

       A LaserJet printer must be configured with sufficient memory to handle the image.   For	a
       full page at 300 dots per inch approximately 2MB of printer memory is required.

       Color images are produced on the PaintJet at 90 dots per inch.  The PaintJet is limited to
       sixteen colors from its 330 color palette on each horizontal print line.  xpr will issue a
       warning	message  if more than sixteen colors are encountered on a line.  xpr will program
       the PaintJet for the first sixteen colors encountered on each line  and	use  the  nearest
       matching programmed value for other colors present on the line.

       Specifying  the	-rv, reverse video, option for the PaintJet will cause black and white to
       be interchanged on the output image.  No other colors are changed.

       Multiplane images must be recorded by xwd in ZPixmap format.   Single  plane  (monochrome)
       images may be in either XYPixmap or ZPixmap format.

       Some  PCL printers do not recognize image positioning commands.	Output for these printers
       will not be centered on the page and header and	trailer  strings  may  not  appear  where

       The -gamma and -render options are supported only on the PaintJet XL printers.

       The -slide option is not supported for LaserJet printers.

       The -split option is not supported for HP printers.

       The -gray option is not supported for HP or IBM printers.
       Copyright 1986, Marvin Solomon and the University of Wisconsin.
       Copyright 1988, Hewlett Packard Company.
       See X(1) for a full statement of rights and permissions.

       Michael R. Gretzinger, MIT Project Athena, Jose Capo, MIT Project Athena (PP3812 support),
       Marvin Solomon, University of Wisconsin, Bob Scheifler,	MIT,  Angela  Bock  and  E.  Mike
       Durbin, Rich Inc. (grayscale), Larry Rupp, HP (HP printer support).

X Version 11				    Release 6					   XPR(1)

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