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man xpr(1)
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xpr(1)                                                                  xpr(1)




NAME

       xpr - print an X window dump


SYNOPSIS

       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 ] [ -version ] [
       filename ]


DESCRIPTION

       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 LaserJet (or other PCL printers), or the HP
       PaintJet.  If no file argument is given, the standard  input  is  used.
       By  default, xpr prints the largest possible representation of the win-
       dow 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.  Cur-
              rently 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 equiva-
              lent to -device ps and is provided only for  backwards  compati-
              bility.

       -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 33 grid.  This  would  be  specified  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.

       -landscape
              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, 33, 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.

       -portrait
              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.

       -compact
              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 used.

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

       -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.

       -noposition
              This  option  causes header, trailer, and image positioning com-
              mand generation to be bypassed for LaserJet, PaintJet and Paint-
              Jet XL printers.

       -gamma correction
              This  changes the intensity of the colors printed by PaintJet XL
              printer. The correction is a floating point value in  the  range
              0.00  to  3.00.   Consult the operator'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 opera-
              tor's manual to determine which algorithms are available.

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

       -version
              This option prints the program version information and exits.



SEE ALSO

       xwd(1), xwud(1), X(7)


LIMITATIONS

       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  exam-
       ple,  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  memory exceeded.''  In the first case, a window
       may have a particular six pixel row  that  contains  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 options.

       The -compact option is only supported for PostScript output.   It  com-
       presses  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.



HP PRINTERS

       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 supported by other
       printers.

       If no -scale is specified the image will be expanded to fit the  print-
       able 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  pro-
       cessed  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  col-
       ors 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 expected.

       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(7) for a full statement of rights and permissions.


AUTHORS

       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)

xpr 1.0.5 - Generated Wed Aug 29 18:18:53 CDT 2018
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