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83 lines
2.8 KiB
Groff
83 lines
2.8 KiB
Groff
.\"
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.\" Copyright (c) 2014-2019 Alfred Klomp
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.\" Copyright (c) 2019 Michael Gmelin
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.\"
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd July 13, 2022
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.Dt SHRINKPDF 1
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.Os
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.Sh NAME
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.Nm shrinkpdf
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.Nd A simple wrapper around Ghostscript to reduce the file size of PDFs
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.Sh SYNOPSIS
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.Nm
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.Op Fl gh
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.Op Fl o Ar outfile
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.Op Fl r Ar res
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.Ar infile
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.Sh DESCRIPTION
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Inspired by some code found in an OpenOffice Python script,
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.Nm
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feeds a PDF through Ghostscript, which performs lossy recompression
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by such methods as downsampling the images to a lower resolution.
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The result should be (but not always is) a much smaller file.
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.Pp
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The following options are available:
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.Bl -tag -width Fl
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.It Fl g
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Enable grayscale conversion which can further reduce output size.
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.It Fl h
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Show help screen.
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.It Fl o Ar outfile
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Output file, default is standard output.
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.It Fl r Ar res
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Resolution in DPI, default is 72.
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.El
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.Pp
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If both
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.Op infile
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and
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.Op outfile
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are regular files, the script checks if the shrunk output file is actually
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smaller than the input file.
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If it is not, it writes a message to stderr and copies the input to output.
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.Sh EXAMPLES
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Reduce PDF resolution to 72 dpi:
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.Dl $ shrinkpdf myfile.pdf >myfile-72dpi.pdf
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.Pp
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Reduce PDF resolution to 300 dpi:
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.Dl $ shrinkpdf -r 300 myfile.pdf >myfile-300dpi.pdf
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.Pp
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Reduce PDF resolution to 150 dpi, specify
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.Op outfile :
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.Dl $ shrinkpdf -o myfile-150dpi.pdf -r 150 myfile.pdf
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.Sh SEE ALSO
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.Xr gs 1
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.Sh AUTHORS
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.An -nosplit
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.Nm
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was written by Alfred Klomp.
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This manual page was written by
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.An Michael Gmelin Aq Mt grembo@FreeBSD.org
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based on content written by Alfred Klomp.
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