84 lines
2.7 KiB
Plaintext
84 lines
2.7 KiB
Plaintext
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#!/bin/bash
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# Copyright (C) 2014-2016 OpenDevise Inc. and the Asciidoctor Project
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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# Optimizes and compresses the specified PDF using Ghostscript (gs).
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#
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# [NOTE]
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# You need at least Ghostscript 9.10 in order for page labels defined in the
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# PDF to be preserved (e.g., front matter pages numbered using roman numerals).
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if [ -z $1 ]; then
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echo "Please supply a PDF file to optimize"
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exit 1
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fi
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if [ -z $GS ]; then
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GS=gs
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fi
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FILE=$1
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FILE_BASENAME=${FILE%.pdf}
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FILE_OPTIMIZED=$FILE_BASENAME-optimized.pdf
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FILE_PDFMARK=
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if [ -f "$FILE_BASENAME.pdfmark" ]; then
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FILE_PDFMARK="$FILE_BASENAME.pdfmark"
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fi
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DOWNSAMPLE_IMAGES=true
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if [ -z $IMAGE_DPI ]; then
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#IMAGE_DPI=150
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IMAGE_DPI=300
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fi
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# /prepress defaults (see http://ghostscript.com/doc/current/Ps2pdf.htm)
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# -d{Color,Gray,Mono}ImageDownsampleType=/Bicubic
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# -dAutoFilter{Color,Gray}Images=true
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# -dOptimize=true
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# -dEmbedAllFonts=true
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# -dSubsetFonts=true
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# -dColorConversionStrategy=/LeaveColorUnchanged
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# -dUCRandBGInfo=/Preserve
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# -dCompressPages=true
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#
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# other unused settings
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# -r72
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#
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# for info about pdfmarks, see http://milan.kupcevic.net/ghostscript-ps-pdf
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#
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# to convert to grayscale, add the following (though doesn't always work)
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#
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# -dProcessColorModel=/DeviceGray \
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# -dColorConversionStrategy=/Gray \
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"$GS" -q -dNOPAUSE -dBATCH -dSAFER -dNOOUTERSAVE \
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-sDEVICE=pdfwrite \
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-dPDFSETTINGS=/prepress \
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-dCannotEmbedFontPolicy=/Warning \
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-dDownsampleColorImages=$DOWNSAMPLE_IMAGES \
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-dColorImageResolution=$IMAGE_DPI \
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-dDownsampleGrayImages=$DOWNSAMPLE_IMAGES \
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-dGrayImageResolution=$IMAGE_DPI \
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-dDownsampleMonoImages=$DOWNSAMPLE_IMAGES \
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-dMonoImageResolution=$IMAGE_DPI \
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-sOutputFile="$FILE_OPTIMIZED" \
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"$FILE" $FILE_PDFMARK
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exit 0
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