ppmtopjxl(1)

NAME

       ppmtopjxl - convert a portable pixmap into an HP PaintJet XL PCL file

SYNOPSIS

       ppmtopjxl  [-nopack]  [-gamma  <n> ] [-presentation] [-dark] [-diffuse]
       [-cluster] [-dither] [-xshift <s> ]  [-yshift  <s>  ]  [-xshift  <s>  ]
       [-yshift <s> ] [-xsize|-width|-xscale <s> ] [-ysize|-height|-yscale <s>
       ] [ppmfile]

DESCRIPTION

       Reads a portable pixmap as input.  Produces a  PCL  file  suitable  for
       printing on an HP PaintJet XL printer as output.

       The  generated  file  is not suitable for printing on a normal PrintJet
       printer.  The -nopack option generates a file which does  not  use  the
       normal  TIFF  4.0 compression method. This file might be printable on a
       normal PaintJet printer (not an XL).

       The -gamma option sets the gamma correction for the image.  The  useful
       range for the PaintJet XL is approximately 0.6 to 1.5.

       The  rendering  algorithm  used  for  images  can  be  altered with the
       -dither, -cluster, and -diffuse options. These options  select  ordered
       dithering,  clustered  ordered  dithering,  or  error diffusion respec-
       tively.  The -dark option can be used to enhance  images  with  a  dark
       background  when  they  are  reduced in size.  The -presentation option
       turns on presentation mode, in which two passes are made over the paper
       to  increase  ink  density.  This  should be used only for images where
       quality is critical.

       The image can be resized by setting the -xsize and -ysize options.  The
       parameter  to  either  of these options is interpreted as the number of
       dots to set the width or height to, but an optional dimension  of  `pt'
       (points),  `dp'  (decipoints), `in' (inches), or `cm' (centimetres) may
       be appended.  If only one dimension is specified,  the  other  will  be
       scaled appropriately.

       The options -width and -height are synonyms of -xsize and -ysize.

       The  -xscale and -yscale options can alternatively be used to scale the
       image by a simple factor.

       The image can be shifted on the page by using the -xshift  and  -yshift
       options.  These move the image the specified dimensions right and down.

SEE ALSO

       ppm(5)

AUTHOR

       Angus Duggan

                                 14 March 1991                    PPMTOPJXL(1)