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