# pdfScale.sh Bash Script to scale and resize PDFs from the command line. Uses ghostscript to create a scaled and or resized version of the pdf input. In `scaling mode`, the PDF paper size does not change, just the elements are scaled. In `resize mode`, the PDF paper will be changed and fit-to-page will be applied. In `mixed mode`, the PDF will first be `resized` then `scaled` with two Ghostscript calls. A temporary file is used in `mixed mode`, at the target location. ## Dependencies The script uses `basename`, `cat`, `grep`, `bc`, `head` and `gs` (ghostscript). You probably have everything installed already, except for ghostscript. Optional dependencies are `imagemagick`, `pdfinfo` and `mdls` (Mac). This app is focused in `Bash`, so it will probably not run on other Shells. ##### apt-get ``` sudo apt-get install ghostscript bc ``` ##### yum ``` sudo yum install ghostscript bc ``` ##### homebrew MacOS ``` brew install ghostscript ``` ##### Optionals Page Size detection is by default in Adaptive Mode. It will try the following methods in sequence: The order of operation is as follows: 1. Try to get `/MediaBox` with `cat` + `grep` 2. Failed AND MacOS ? Try `mdls` 3. Failed ? Try `pdfinfo` 4. Failed ? Try ImageMagick's `identify` 5. Failed ? `Exit` with error message The `cat`+`grep` method will fail on PDFs without a `/MediaBox`. You may install any of the optionals to be used in that case. ##### apt-get ``` sudo apt-get install imagemagick pdfinfo ``` ##### yum ``` sudo yum install imagemagick pdfinfo ``` ##### homebrew MacOS ``` brew install imagemagick xpdf ``` ## Help info ``` $ pdfscale -h pdfscale v2.0.0 Usage: pdfscale [-v] [-s ] [-m ] [-r ] [outfile.pdf] pdfscale -p pdfscale -h pdfscale -V Parameters: -v Verbose mode, prints extra information Use twice for timestamp -h Print this help to screen and exits -V Prints version to screen and exits -m Page size Detection mode May disable the Adaptive Mode -s Changes the scaling factor or forces scaling Defaults: 0.95 / no scaling (resize mode) MUST be a number bigger than zero Eg. -s 0.8 for 80% of the original size -r Triggers the Resize Paper Mode Resize PDF paper proportionally Must be a valid Ghostscript paper name -p Prints Ghostscript paper info tables to screen Scaling Mode: The default mode of operation is scaling mode with fixed paper size and scaling pre-set to 0.95. By not using the resize mode you are using scaling mode. Resize Paper Mode: Disables the default scaling factor! (0.95) Alternative mode of operation to change the PDF paper proportionally. Will fit-to-page. Mixed Mode: In mixed mode both the -s option and -r option must be specified. The PDF will be both scaled and have the paper type changed. Output filename: The output filename is optional. If no file name is passed the output file will have the same name/destination of the input file with added suffixes: .SCALED.pdf is added to scaled files ..pdf is added to resized files ..SCALED.pdf is added in mixed mode Page Detection Modes: a, adaptive Default mode, tries all the methods below c, cat+grep Forces the use of the cat + grep method m, mdls Forces the use of MacOS Quartz mdls p, pdfinfo Forces the use of PDFInfo i, identify Forces the use of ImageMagick's Identify Valid Ghostscript Paper Names: A0 A1 A2 A3 A4 A4SMALL A5 A6 A7 A8 A9 A10 ISOB0 ISOB1 ISOB2 ISOB3 ISOB4 ISOB5 ISOB6 C0 C1 C2 C3 C4 C5 C6 11X17 LEDGER LEGAL LETTER LETTERSMALL ARCHE ARCHD ARCHC ARCHB ARCHA JISB0 JISB1 JISB2 JISB3 JISB4 JISB5 JISB6 FLSA FLSE HALFLETTER HAGAKI Notes: - Adaptive Page size detection will try different modes until it gets a page size. You can force a mode with -m 'mode'. - Options must be passed before the file names to be parsed. - Having the extension .pdf on the output file name is optional, it will be added if not present. - File and folder names with spaces should be quoted or escaped. - The scaling is centered and using a scale bigger than 1 may result on cropping parts of the pdf. Examples: pdfscale myPdfFile.pdf pdfscale myPdfFile.pdf myScaledPdf pdfscale -v -v myPdfFile.pdf pdfscale -s 0.85 myPdfFile.pdf myScaledPdf.pdf pdfscale -m pdfinfo -s 0.80 -v myPdfFile.pdf pdfscale -v -v -m i -s 0.7 myPdfFile.pdf pdfscale -h ``` ## Example runs ``` $ pdfscale -v -r a0 -s 1.05 ../mixsync\ manual\ v1-2-3.pdf pdfscale v2.0.0 - Verbose Execution Checking for ghostscript and bcmath Input file: ../mixsync manual v1-2-3.pdf Output file: ../mixsync manual v1-2-3.A0.SCALED.pdf Get Page Size: Adaptive Enabled Method: Cat + Grep Mixed Tasks: Resize & Scale Scale factor: 1.05 Source Width: 842 postscript-points Source Height: 595 postscript-points Flip Detect: Wrong orientation! Inverting Width <-> Height Resizing to: A0 ( 3370 x 2384 ) New Width: 3370 postscript-points New Height: 2384 postscript-points Translation X: -80.236330 Translation Y: -56.760656 ``` ``` $ pdfscale -v -v -s 0.9 ../input-nup.pdf "../my glorius PDF" pdfscale v2.0.0 - Verbose Execution 2017-05-13:20:22:18 | Checking for ghostscript and bcmath 2017-05-13:20:22:18 | Input file: ../input-nup.pdf 2017-05-13:20:22:18 | Output file: ../my glorius PDF.pdf 2017-05-13:20:22:18 | Get Page Size: Adaptive Enabled 2017-05-13:20:22:18 | Method: Cat + Grep 2017-05-13:20:22:18 | Failed 2017-05-13:20:22:18 | Method: Mac Quartz mdls 2017-05-13:20:22:18 | Single Task: Scale PDF Contents 2017-05-13:20:22:18 | Scale factor: 0.9 (manual) 2017-05-13:20:22:18 | Source Width: 842 postscript-points 2017-05-13:20:22:18 | Source Height: 595 postscript-points 2017-05-13:20:22:18 | Translation X: 46.777310 2017-05-13:20:22:18 | Translation Y: 33.055225 ``` ``` $ pdfscale -v -r a2 "../mixsync manual v1-2-3.pdf" pdfscale v2.0.0 - Verbose Execution Checking for ghostscript and bcmath Input file: ../mixsync manual v1-2-3.pdf Output file: ../mixsync manual v1-2-3.A2.pdf Get Page Size: Adaptive Enabled Method: Cat + Grep Single Task: Resize PDF Paper Scale factor: Disabled (resize only) Source Width: 842 postscript-points Source Height: 595 postscript-points Flip Detect: Wrong orientation! Inverting Width <-> Height Resizing to: A2 ( 1684 x 1191 ) ``` ## System Install The installer will name the executable as `pdfscale` with no uppercase chars and without the `.sh` extension. If you have `make` installed you can use it to install to `/usr/local/bin/pdfscale` with: ``` sudo make install ``` To remove the installation use: ``` sudo make uninstall ```