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Re: PageSize
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From: |
Peter Samuel |
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Subject: |
Re: PageSize |
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Date: |
Wed, 3 Feb 1999 04:05:05 +0300 (MSK) |
On Mon, 1 Feb 1999, Monty Zukowski wrote:
> I've been generating some PostScript with Lout to be printed on a plotter
> and when I print it reels off a few extra feet of paper. I consulted the
> printer manufacturer's web site, and they recommended adding a PostScript
> command such as this:
>
> <</PageSize [1584 2448]>>setpagedevice
>
> This sets the page size for the device (which can change since it prints off
> of a roll of paper. I have been using a lout setup file with the proper
> margins and page size set to Other with appropriate sizes, but that didn't
> make the printer happy.
>
> So, what's the best way to get that PostScript command into the Lout file
> for generation? Do you know if there is a preferred place to include it
> into the document?
I have a package called psenlarge that will take PS and convert it to
PS with the relevant setpagedevice contructs. It requires Perl 5.x and
ghostscript 5.x (tested with 5.10 and 5.50). It uses the pswrite driver
to "normalise" the input PostScript. pswrite has a couple of little
quirks
- dash dimensions are wrong. psenlarge attempts to correct for
this
- setlinewidths are wrong. psenlarge attempts to correct for this
- some colour images lose colour. psenlarge cannot correct for
this.
I've used it to scale images from A4 to A0 for our plotter (OCE5120
begin driven by ghostscript's HP DesignJet 650C engine) but it will do
just about anything you want. See the man page below.
It is available from
ftp://ftp.uniq.com.au/pub/tools/psenlarge-1.3.tar.gz
Regards
Peter
----------
Peter Samuel address@hidden
Technical Consultant or at present:
Uniq Professional Services, address@hidden
a division of X-Direct Pty Ltd
Phone: +61 2 9206 3410 Fax: +61 2 9281 1301
"If you kill all your unhappy customers, you'll only have happy ones left"
###########################################################################
PSENLARGE(1) User Commands PSENLARGE(1)
NAME
psenlarge - enlarge or reduce a PostScript file
SYNOPSIS
psenlarge -h
psenlarge [-oP |-xnn -ynn] [-m] [-n] file.ps
psenlarge [-p [-iP |-Xnn -Ynn]] [-m] [-oP |-xnn -ynn] [-m]
[-n] file.ps
DESCRIPTION
psenlarge enlarges or reduces a PostScript file to one of a
number of different paper sizes or a custom size.
psenlarge uses Ghostscript to normalise the input PostScript
by converting it to PostScript of a known form using the
pswrite driver. This driver is shipped with Ghostscript 5.x.
Therefore psenlarge requires Ghostscript 5.x or later. As of
the writing of this software, Ghostscript 5.50 was the most
stable release of Ghostscript known to work with psenlarge,
however psenlarge will also work with Ghostscript 5.10.
psenlarge bases its scaling factors on the BoundingBox
information obtained from the pswrite driver. psenlarge
will attempt to maximise the scaling while maintaining the
original aspect ratio. For example, if the original is A4
but only occupies the bottom quarter of the page, psenlarge
will attempt to make the resulting BoundingBox occupy the
entire page less a margin at each edge of the page. The
resulting BoundingBox will be centred on the page.
psenlarge will only operate on the first file given on the
command line. If a file name is not provided, standard input
is used. The resulting PostScript is sent to standard out-
put.
OPTIONS
-h Print the usage information
-oP The output paper size. Where P is one of:
Paper Dimensions
__________________________________________
A10 26 mm x 37 mm
A9 37 mm x 53 mm
A8 53 mm x 74 mm
A7 74 mm x 105 mm
A6 105 mm x 149 mm
A5 149 mm x 210 mm
A4 210 mm x 297 mm
A3 297 mm x 420 mm
A2 420 mm x 594 mm
A1 594 mm x 840 mm
SunOS 5.5.1 Last change: 27 October 1998 1
PSENLARGE(1) User Commands PSENLARGE(1)
A0 840 mm x 1188 mm
B5 177 mm x 250 mm
B4 250 mm x 353 mm
US Letter 8 1/2 inches x 11 inches
Letter 8 1/2 inches x 11 inches
US Ledger 11 inches x 17 inches
Ledger 11 inches x 17 inches
US Legal 8 1/2 inches x 14 inches
Legal 8 1/2 inches x 14 inches
US 11x17 11 inches x 17 inches
11x17 11 inches x 17 inches
US Tabloid 11 inches x 17 inches
Tabloid 11 inches x 17 inches
US Statement 5 1/2 inches x 8 1/2 inches
Statement 5 1/2 inches x 8 1/2 inches
US Executive 7 1/2 inches x 10 inches
Executive 7 1/2 inches x 10 inches
US Folio 8 1/2 inches x 13 inches
Folio 8 1/2 inches x 13 inches
US Quarto 8.47 inches x 10.8 inches
Quarto 8.47 inches x 10.8 inches
US 10x14 10 inches x 14 inches
10x14 10 inches x 14 inches
The default output paper size is A0. -o cannot be
specified with either the -x or -y options.
-xnn -ynn
The output paper size using custom measurements. The x
value is the width in PostScript points and the y value
is the height in PostScript points. One point is 1/72
inches. If the value is immediately followed by either
an i or an m the units will be inches or millimetres
respectively. If both the -x and -y options have trail-
ing unit qualifiers, the last unit qualifier specified
will take precedence. Both the -x and -y options must
be specified together. These options cannot be used
with the -o option.
-m Do not preserve the aspect ratio of the original Boun-
dingBox. Adjust the scaling to use as much of the
paper as possible, less a default margin at each edge.
Cannot be used with the -p option.
-n Do not enforce a margin at each of of the output page.
The default margin is 25 PostScript points. Once point
is 1/72 inches.
-p Use the ratio of input page size to output page size to
determine scaling factors instead of the input Boun-
dingBox details.
SunOS 5.5.1 Last change: 27 October 1998 2
PSENLARGE(1) User Commands PSENLARGE(1)
-iP The input page size. Where P is one of the page names
listed in the table above. The default input paper size
is A4. Can only be used with the -p option. Cannot be
used with either the -X or -Y options.
-Xnn -Ynn
The input paper size using custom measurements. The X
value is the width in PostScript points and the Y value
is the height in PostScript points. One point is 1/72
inches. If the value is immediately followed by either
an i or an m the units will be inches or millimetres
respectively. If both the -X and -Y options have trail-
ing unit qualifiers, the last unit qualifier specified
will take precedence. Both the -X and -Y options must
be specified together. These options must be used with
the -p option. These options cannot be used with the -i
option.
EXAMPLES
The following examples assume that the input PostScript -
tiger.ps - has a BoundingBox of 0 0 598 843
psenlarge tiger.ps
Enlarge the file tiger.ps to A0. Use as much of the
paper as possible while preserving the aspect ratio.
Leave a margin at each edge of the output page. Output
will be sent to STDOUT.
cat tiger.ps | psenlarge -oB5 -n
Reduce the file tiger.ps to B5. Preserve the original
aspect ratio of the BoundingBox. Do not use any mar-
gins. Output will be sent to STDOUT.
psenlarge -oLetter tiger.ps > tiger.letter.ps
Convert the file tiger.ps to US Letter and save the
output in the file tiger.letter.ps. Preserve the ori-
ginal aspect ratio of the BoundingBox .
psenlarge -o"US Letter" tiger.ps > tiger.letter.ps
Convert the file tiger.ps to US Letter and save the
output in the file tiger.letter.ps. Preserve the ori-
ginal aspect ratio of the BoundingBox . Note the use of
the alternative paper name and the need for the double
quotes.
psenlarge -x8.25i -y10.5 -n tiger.ps
Convert the file tiger.ps to a custom size of 8 1/4
inches by 10 1/2 inches. Preserve the original aspect
ratio of the BoundingBox. Do not use any margins.
psenlarge -x8.25i -y10.5m -n tiger.ps
SunOS 5.5.1 Last change: 27 October 1998 3
PSENLARGE(1) User Commands PSENLARGE(1)
Convert the file tiger.ps to a custom size of 8 1/4
millimetres by 10 1/2 millimetres. Preserve the origi-
nal aspect ratio of the BoundingBox. Do not use any
margins. Note that the units are millimetres in this
case as the second unit qualifier m takes precedence
over the first.
psenlarge -p -X598 -Y843 -oB5 tiger.ps
Reduce the file tiger.ps to B5. Base the scaling on the
ratio of the input size of 598 PostScript points by 843
PostScript points to the size of a B5 page less a mar-
gin at each edge of the B5 output page. Output will be
sent to STDOUT.
CAVEATS
The pswrite driver can often generate files that are signi-
ficantly larger than the original PostScript input file.
psenlarge will not improve the resolution of the input
images. If the scaling factor is greater than 1 then output
pixels will be scaled accordingly. This can result in
heavily pixelated images at large magnifications.
The pswrite driver appears to have a problem with the
PostScript setdash operator. Values for this operator seem
to be 72 times larger than they should be. Correcting this
situation can result in large gaps in the dashed lines for
large magnifications. psenlarge attempts to compensate for
this anomaly by dividing the setdash values by 36 instead of
72. Testing has thus far been limited to only a few cases.
The pswrite driver appears to have a problem with the
PostScript setlinewidth operator. Values for this operator
seem to be 10 times smaller than they should be for
Ghostscript 5.10 and 100 times smaller than they should be
for Ghostscript 5.50. Correcting this situation can result
in lines which are too thick for large magnifications.
psenlarge attempts to compensate for this anomaly by multi-
plying the setlinewidth values by 5 instead of 10 in the
case of Ghostscript 5.10 and by 50 instead of 100 in the
case of Ghostscript 5.50. Testing has thus far been limited
to only a few cases.
The pswrite driver appears to have some problems with colour
images. Occasionally colour images will have their colour
maps altered so that they appear as black and white images.
There seems to be no way of determining whether the pswrite
will affect colour images until the image is processed by
the pswrite driver.
psenlarge attempts to catch PostScript errors by examining
the standard output from Ghostscript. This may not work in
SunOS 5.5.1 Last change: 27 October 1998 4
PSENLARGE(1) User Commands PSENLARGE(1)
all cases - especially if the input PostScript file has its
own error handling routines that override those in
Ghostscript's own systemdict dictionary. Ghostscript's
standard output is redirected to psenlarge's standard error.
psenlarge will handle multi page files however the Bounding-
Box details generated by the pswrite driver are for the
entire document. If, for example, page 1 occupies the top
right corner and page 2 occupies the bottom left corner, the
BoundingBox generated by pswrite will be for the entire
page.
VERSION
Version 1.3
AUTHOR
Peter Samuel, Uniq Professional Services
SEE ALSO
gs(1).
SunOS 5.5.1 Last change: 27 October 1998 5
- PageSize, Monty Zukowski, 1999/02/01
- Re: PageSize,
Peter Samuel <=