feature: -g option for grayscale

falsisign.sh

@@ -6,7 +6,7 @@ usage(){
 Falsisign.
 
 Usage:
-    falsisign -d <input_pdf> -x <X> -y <Y> [-p <pages>] -s <sign_dir> [-S <scale>] [-c] [-i <init_dir> -z <Z> -t <T> [-q <pages>]] [-r <density>] -o <output_pdf>
+    falsisign -d <input_pdf> -x <X> -y <Y> [-p <pages>] -s <sign_dir> [-S <scale>] [-c] [-i <init_dir> -z <Z> -t <T> [-q <pages>]] [-r <density>] [-g] -o <output_pdf>
 
 Options:
     -d <input_pdf>   The PDF document you want to sign
@@ -24,6 +24,7 @@ Options:
                      Defaults to all but the last
     -r <density>     Specify the dpi to use in intermediate steps
     -a <angle>       Specify the rotation (in degrees) to use for all pages
+    -g               Convert to grayscale
     -o <output_pdf>  The output file name
 EOF
     exit "$1"
@@ -31,7 +32,7 @@ EOF
 
 FALSICOORD="$(dirname "${BASH_SOURCE[0]}")/falsicoord.py"
 
-while getopts :hd:x:y:p:s:S:ci:z:t:q:r:a:o: flag
+while getopts :hd:x:y:p:s:S:ci:z:t:q:r:a:gi:o: flag
 do
     case "${flag}" in
         d ) DOCUMENT="${OPTARG}";;
@@ -47,6 +48,7 @@ do
         q ) INITIAL_PAGES="${OPTARG}";;
         r ) DENSITY="${OPTARG}";;
         a ) FIXED_ROTATION="${OPTARG}";;
+        g ) GRAY=1;;
         o ) OUTPUT_FNAME="${OPTARG}";;
         h ) usage 0 ;;
         * ) usage 1 ;;
@@ -79,7 +81,12 @@ NUMBER_OF_PAGES=0
 for page in "${TMPDIR}/${DOCUMENT_BN}"-*.pdf
 do
     page_bn=$(basename ${page} .pdf)
+    if [ -n "${GRAY:-}" ]
+    then
+      convert -density "${DENSITY}" "${page}" -resize 2480x3508! -grayscale Rec709Luminance "${TMPDIR}/${page_bn}.png"
+    else 
       convert -density "${DENSITY}" "${page}" -resize 2480x3508! "${TMPDIR}/${page_bn}.png"
+    fi
     let NUMBER_OF_PAGES=NUMBER_OF_PAGES+1
 done