Provided by: netpbm_11.01.00-2build1_amd64 bug

NAME

       ppmtopcx - convert a PPM image to a PCX file

SYNOPSIS

       ppmtopcx

       [-24bit]

       [-8bit]

       [-packed]

       [-stdpalette]

       [-palette=palettefile]

       [-planes=planes]

       [-xpos=cols]

       [-ypos=rows]

       [ppmfile]

DESCRIPTION

       This program is part of Netpbm(1).

       ppmtopcx  reads  a  PPM image as input and produces a PCX file as output.  The type of the
       PCX file depends on the number of colors in the input image:

       16 colors or fewer:
              1 bit/pixel, 1-4 planes, colormap in header

       more than 16 colors, but no more than 256:
              8 bits/pixel, 1 plane, colormap at the end of the file.

       More than 256 colors:
              24bit truecolor file (8 bits/pixel, 3 planes).

       You can override some of that and explicitly choose the format with the options below.

OPTIONS

       In addition to the options common to all programs based on libnetpbm (most notably -quiet,
       see
        Common  Options  ⟨index.html#commonoptions⟩  ), ppmtopcx recognizes the following command
       line options:

       -24bit Produce a 24bit truecolor PCX file, even if the image has 256 colors or fewer.

       -8bit  Produce an 8bit (256 colors) PCX file, even if the image has 16 colors or fewer.

              This option was added in Netpbm 10.18 (August 2003).

       -packed
              Use "packed pixel" format for files with 16 colors or fewer: 1, 2, or 4 bits/pixel,
              1 plane.

       -stdpalette
              Instead of computing a palette from the colors in the image, use a standard, built-
              in 16 color palette.  If the image contains a color that is  not  in  the  standard
              palette, ppmtopcx fails.

              The standard palette is not only a set of colors, but a specific mapping of palette
              indexes to colors.  E.g. red is 4.

              You can use pnmremap with a suitable PPM image of the  standard  palette  to  adapt
              your  image to use exactly those colors in the palette so that ppmtopcx -stdpalette
              will work on it.

              The file pcxstd.ppm, part of Netpbm, contains the standard palette.

              Although the PCX header tells exactly what palette is used in the file, some  older
              PCX  interpreters  do  not  use that information.  They instead assume the standard
              palette.  If you don't use the -stdpalette option, ppmtopcx, ppmtopcx may create an
              image  that  uses a different palette (a rearrangement of the same colors) and then
              one of these older interpreters would interpret the colors in the image wrong.

              You cannot specify this option along with -palette.

              This option was new in Netpbm 10.22 (April 2004).

       -palette=palettefile
              Instead of computing the palette from the colors in the image, use the palette from
              the file palettefile.  If the palette contains a color that is not in that palette,
              ppmtopcx fails.

              The palette file must be a PPM image that contains one pixel for each color in  the
              palette.   It  doesn't  matter  what the aspect ratio of the palette image is.  The
              order of the colors in the PCX palette is the order of the pixels in the PPM  image
              in  standard  western  reading order (left to right, top to bottom).  If there is a
              duplicate color in the  palette,  ppmtopcx  chooses  between  them  arbitrarily  in
              building the PCX raster.

              You  would need this only if you have a PCX reader that can't read the palette that
              is in the PCX file and instead assumes  some  particular  palette.   See  also  the
              -stdpalette option.

              If  your input image might contain colors other than those in your palette, you can
              convert the input image to one that contains only those colors in your palette with
              pnmremap.

              You cannot specify this along with -stdpalette.

              This option was new in Netpbhm 10.25 (October 2004).

       -planes=planes
              Generate  a  PCX  file  with planes planes, even though the number of colors in the
              image could be represented in fewer.  This makes the  file  larger,  but  some  PCX
              interpreters are capable of processing only certain numbers of planes.

              This  is  meaningful  only when ppmtopcx generates an image in the 16 color palette
              format without  packed  pixels.   Consequently,  you  cannot  specify  this  option
              together with -24bit or -8bit or -packed.

              The  valid  values for planes are 1, 2, 3, and 4.  By default, ppmtopcx chooses the
              smallest number of planes that can represent the colors  in  the  image.   E.g.  if
              there are 5 colors, ppmtopcx chooses 3 planes.

              This option was new in Netpbm 10.21 (March 2004).

       -xpos=cols

       -ypos=rows
               These  options  set  the position of the image in some field (e.g. on a screen) in
              columns to the right of the left edge and rows below the top edge.  The PCX  format
              contains  image  position  information.  Don't confuse this with the position of an
              area of interest within the image.  For example, using pnmpad to  add  a  10  pixel
              left  border to an image and then converting that image to PCX with xpos = 0 is not
              the same as converting the original image to PCX and setting xpos = 10.

              The values may be from -32767 to 32768.

              The default for each is zero.

SEE ALSO

       pcxtoppm(1), ppm(1)

AUTHORS

       Copyright (C) 1994 by Ingo Wilken (Ingo.Wilken@informatik.uni-oldenburg.de)

       Based on previous work by Michael Davidson.

DOCUMENT SOURCE

       This manual page was generated by the Netpbm tool 'makeman' from HTML source.  The  master
       documentation is at

              http://netpbm.sourceforge.net/doc/ppmtopcx.html