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| 1 | #!/bin/bash | |
| 2 | ############################################################# | |
| 3 | # SignPDF: A simple way to add a signature image to a pdf at given page under linux. | |
| 4 | # The inserted signature has the same aspect ratio than the original. | |
| 5 | ############################################################# | |
| 6 | # Description: | |
| 7 | # The script uses xv to display the page where the signature should be inserted. Click on two points inside xv with the left-mouse-button to define the signature's box corner. Don't maintain the mouse. It has to be two single clicks. The order of the click does not matter. Only the two last clicks are considered. Press q to quit xv. The signed file is generated in the same folder than the original, without overriding it. The signature keeps the same proportion than the original. You can move, but should not resize xv window. | |
| 8 | # | |
| 9 | # Written by : Emmanuel Branlard | |
| 10 | # Date : April 2012 | |
| 11 | # Dependencies : xv, pdftk, imagemagick . | |
| 12 | # To get xv: compile from source http://www.trilon.com/xv/d | |
| 13 | # OR find a .deb repository on internet | |
| 14 | # License : Feel free to modify and adapt it | |
| 15 | # | |
| 16 | # Usage: | |
| 17 | # First argument: pdf file | |
| 18 | # Second argument: page number where the signature should be put | |
| 19 | # | |
| 20 | # | |
| 21 | # Example: Add a signature to file "my file.pdf" on page 5: | |
| 22 | # ./SignPDF "my file.pdf" 5 "signature.png" | |
| 23 | # | |
| 24 | # Note : You need to edit the SIGNATURE variable below for default signature | |
| 25 | # This script generates a folder where everything takes place | |
| 26 | # The folder is deleted afterwards. See line below: | |
| 27 | TMP=tmp-folder-signpdf | |
| 28 | ||
| 29 | if [ $# -eq 0 ] | |
| 30 | then | |
| 31 | echo " | |
| 32 | Usage: | |
| 33 | SignPdf <PdfFile> <PageNumber> | |
| 34 | SignPdf <PdfFile> <PageNumber> [SignatureFile] | |
| 35 | Example: | |
| 36 | SignPdf \"my file.pdf\" 5 signature.png | |
| 37 | ||
| 38 | Look at the source for more informations. | |
| 39 | " | |
| 40 | exit 0 | |
| 41 | elif [ $# -eq 2 ] | |
| 42 | then | |
| 43 | SIGNATURE="/mnt/DataWin/Admin/IDs/SignatureBlue-New.pdf" | |
| 44 | else | |
| 45 | SIGNATURE=$3 | |
| 46 | fi | |
| 47 | ||
| 48 | echo " -------------- Called with: -------------- | |
| 49 | File : $1 | |
| 50 | Page : $2 | |
| 51 | Signature: $SIGNATURE " | |
| 52 | ||
| 53 | ||
| 54 | # set -vx | |
| 55 | DIR=`pwd`; | |
| 56 | mkdir $TMP | |
| 57 | cd $TMP | |
| 58 | ||
| 59 | echo "-------------- Bursting pdf -----------------" | |
| 60 | pdftk "../$1" burst output page_%d.pdf | |
| 61 | # convert -page A4 -units PixelsPerInch -density 100 page_$2.pdf page_$2.png | |
| 62 | convert -density 100 page_$2.pdf page_$2.png | |
| 63 | ||
| 64 | ||
| 65 | echo "-------------- !!! Click on two points defining the signature box -----------------" | |
| 66 | echo "-------------- !!! Don't resize the window - you can move it though -----------------" | |
| 67 | echo "-------------- Press q to exit -----------------" | |
| 68 | xv -nolimits -D 1 page_$2.png 2> log.log | |
| 69 | # cat log.log |grep --colours=none ButtonPress |grep --colours=none mainW | |
| 70 | # cat log.log |grep --color=none ButtonPress |grep --color=none mainW |tail -n 2 >buff.log | |
| 71 | cat log.log |grep --color=none ButtonPress |grep --color=none mainW |tail -n 2|cut -c 29- > buff.log | |
| 72 | x1=`awk -F, 'NR==1 {print $1}' buff.log|tr -d -c '[0-9]'`
| |
| 73 | y1=`awk -F, 'NR==1 {print $2}' buff.log|tr -d -c '[0-9]'`
| |
| 74 | x2=`awk -F, 'NR==2 {print $1}' buff.log|tr -d -c '[0-9]'`
| |
| 75 | y2=`awk -F, 'NR==2 {print $2}' buff.log|tr -d -c '[0-9]'`
| |
| 76 | ||
| 77 | # dimensions of the rectangle specified by the user | |
| 78 | dx=`expr $x2 - $x1` | |
| 79 | dy0=`expr $y1 - $y2` | |
| 80 | ||
| 81 | # a flag to see if the user has gone up and down instead of down and up | |
| 82 | reverse_flag=0 | |
| 83 | # checking user input | |
| 84 | if [[ $dy0 -lt 0 ]] | |
| 85 | then | |
| 86 | reverse_flag=1 | |
| 87 | dy0=`expr $y2 - $y1` | |
| 88 | fi | |
| 89 | if [[ $dx -lt 0 ]] | |
| 90 | then | |
| 91 | buffer=$x2 | |
| 92 | x2=$x1 | |
| 93 | x1=$buffer | |
| 94 | dx=`expr $x2 - $x1` | |
| 95 | fi | |
| 96 | ||
| 97 | cd $DIR | |
| 98 | # Signature image dimensions | |
| 99 | dxs=`identify -format "%[fx:w]" "$SIGNATURE"|tr -d -c '[0-9]'` | |
| 100 | dys=`identify -format "%[fx:h]" "$SIGNATURE"|tr -d -c '[0-9]'` | |
| 101 | cd $TMP | |
| 102 | ||
| 103 | # Keeping aspect ratio of the signature | |
| 104 | dy=`expr $dx \* $dys / $dxs` | |
| 105 | ||
| 106 | if [[ $reverse_flag -eq 0 ]] | |
| 107 | then | |
| 108 | # Here it's tricky either you use the user input $dy0 or $dyA | |
| 109 | y1=`expr $y1 - $dy0` | |
| 110 | fi | |
| 111 | # The following because I chose to double the density | |
| 112 | # dx=`expr $dx \* 2` | |
| 113 | # dy=`expr $dy \* 2` | |
| 114 | # y1=`expr $y1 \* 2` | |
| 115 | # x1=`expr $x1 \* 2` | |
| 116 | # composite -geometry 100x100+$y1+$x1 $SIGNATURE page_$2.png composite.png | |
| 117 | echo "-------------- Inserting Signature at lower left corner: +$x1+$y1" | |
| 118 | ||
| 119 | cd $DIR | |
| 120 | composite -geometry "$dx"x"$dy"+$x1+$y1 "$SIGNATURE" $TMP/page_$2.png $TMP/page_$2b.png | |
| 121 | convert -density 100 $TMP/page_$2b.png $TMP/page_$2.pdf | |
| 122 | - | pdftk $TMP/ |
| 122 | + | pdftk $TMP/page_*.pdf cat output "${1%.pdf}_signed.pdf"
|
| 123 | ||
| 124 | ||
| 125 | echo "-------------- File ${1%.pdf}_signed.pdf created ------------- "
| |
| 126 | echo "-------------- Done -------------" | |
| 127 | rm -r $TMP |
