convert portable anymap to PostScript
see also :
gs - psidtopgm - pstopnm - pbmtoepsi - pbmtopsg3 - ppmtopgm
[-scale s] [-dpi n]
[-imagewidth n] [-imageheight n]
[-setpage] [-nosetpage] [pnmfile]
All options can
be abbreviated to their shortest unique prefix. You may use
two hyphens instead of one. You may separate an option name
and its value with white space instead of an equals
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Reads a Netpbm
image as input. Produces Encapsulated PostScript as
If the input
file is in color (PPM), pnmtops generates a color
PostScript file. Some PostScript interpreters can’t
handle color PostScript. If you have one of these you will
need to run your image through ppmtopgm first.
If you specify
no output dimensioning options, the output image is
dimensioned as if you had specified -scale=1.0, which
means aproximately 72 pixels of the input image generate one
inch of output (if that fits the page).
-equalpixels, -width, -height, and
-scale to adjust that.
-imageheight Tells how
wide and high you want the image on the page, in inches. The
aspect ratio of the image is preserved, so if you specify
both of these, the image on the page will be the largest
image that will fit within the box of those dimensions.
dimensions are greater than the page size, you get
Postscript output that runs off the page.
You cannot use
imagewidth or imageheight with -scale
This option causes the output
image to have the same number of pixels as the input image.
So if the output device is 600 dpi and your image is 3000
pixels wide, the output image would be 5 inches wide.
You cannot use
-equalpixels with -imagewidth,
-imageheight, or -scale.
tells how big you want the image on the page. The value
is the number of inches of output image that you want 72
pixels of the input to generate.
pnmtops rounds the number to something that is an
integral number of output device pixels. E.g. if the output
device is 300 dpi and you specify -scale=1.0, then 75
(not 72) pixels of input becomes one inch of output (4
output pixels for each input pixel). Note that the
-dpi option tell pnmtops how many pixels per
inch the output device generates.
If the size so
specified does not fit on the page (as measured either by
the -width and -height options or the default
page size of 8.5 inches by 11 inches), pnmtops
ignores the -scale option, issues a warning, and
scales the image to fit on the page.
This option specifies the dots
per inch of your output device. The default is 300 dpi. In
theory PostScript is device-independent and you don’t
have to worry about this, but in practice its raster
rendering can have unsightly bands if the device pixels and
the image pixels aren’t in sync.
option is crucial to the working of the equalpixels
-height These options
specify the dimensions of the page on which the output is to
be printed. This can affect the size of the output
The page size
has no effect, however, when you specify the
-imagewidth, -imageheight, or
may also affect positioning of the image on the page and
even the paper selected (or cut) by the printer/plotter when
the output is printed. See the -nosetpage option.
The default is
8.5 inches by 11 inches.
-noturn These options
control whether the image gets turned 90 degrees. Normally,
if an image fits the page better when turned (e.g. the image
is wider than it is tall, but the page is taller than it is
wide), it gets turned automatically to better fit the page.
If you specify the -turn option, pnmtops turns
the image no matter what its shape; If you specify
-noturn, pnmtops does not turn it no
matter what its shape.
-runlength These identical options specify
run-length compression. This may save time if the
host-to-printer link is slow; but normally the
printer’s processing time dominates, so -rle
makes things slower.
By default, pnmtops
centers the image on the output page. You can cause
pnmtops to instead put the image against the upper
left corner of the page with the -nocenter option.
This is useful for programs which can include PostScript
files, but can’t cope with pictures which are not
positioned in the upper left corner.
compatibility, pnmtops accepts the option
-center, but it has no effect.
pnmtops can generate a
"setpagedevice" directive to tell the
printer/plotter what size paper to use (or cut). The
dimensions it specifies on this directive are those selected
or defaulted by the width and height options
or defaulted. If you want a "setpagedevice"
directive in the output, specify -setpage. This can
be useful if your printer chokes on this directive, which
has not always been defined in Postscript, or you want to
fake out the printer and print on one size paper as if
you’re printing on another.
10.0 the default was to generate the
"setpagedevice" directive, and there is the switch
-nosetpage to supress it, but that’s actually a
gs , psidtopgm , pstopnm ,
pbmtolps, pbmtoepsi ,
pbmtopsg3 , ppmtopgm ,
1989, 1991 by Jef Poskanzer.
Modified November 1993 by Wolfgang Stuerzlinger,