support for vertical and horizontal justification

[stereofy] / stereofy.sh

diff --git a/stereofy.sh b/stereofy.sh
index 51cbfb15c1579d9ed02deb0f08ddbc3e73f8ebd2..9b54bb70bf41b0e86d2251e654b9b3d736b3da38 100755 (executable)
--- a/stereofy.sh
+++ b/stereofy.sh
@@ -18,9 +18,15 @@
 algo="d"   #algorythm, Dubois by default
 model="rc" #color model, red-cyan by default
 param=""   #leave blank, will be -$algo$model
-left=''
-right=''
-stereo=''
+left=''           #left image filename
+right=''   #right image file name
+stereo=''  #output image file name
+vert=0     #vertical justification
+hor=0      #horizontal justification
+lvoff=0    #left image vertical crop offset
+rvoff=0    #right image vertical crop offset
+lhoff=0    #left image horizontal crop offset
+rhoff=0    #right image horizontal crop offset
 
 while [ -n "$1" ]; do
   case "$1" in
@@ -32,6 +38,8 @@ while [ -n "$1" ]; do
     -gm|--gm|--green-magenta) model="gm";;
     -ab|--ab|--amber-blue|--yellow-blue) model="ab";;
     -[dfh]rc|-[dfh]gm|-[fe]mc|-dab) param="$1";;
+    --vjust|-ver|--ver|--vertical) shift 1; vert="$1";;
+    --hjust|-hor|--hor|--horizontal) shift 1; hor="$1";;
     -*) echo "no such color model" >/dev/stderr; exit 1;;
     *)  if [ -z "$left" ]; then
          left="$1"
@@ -44,19 +52,51 @@ while [ -n "$1" ]; do
   esac
   shift 1;
 done
+if (echo $vert |egrep -qx '[+-]*[0-9]*[02468]'); then true
+else
+  echo 'vertical alignment must be an even number'
+  exit 1
+fi
+if (echo $hor  |egrep -qx '[+-]*[0-9]*[02468]'); then true
+else
+  echo 'horizontal alignment must be an even number'
+  exit 1
+fi
 
 [ -z "$param" ] && param="-$algo$model"
 [ -z "$stereo" ] && stereo="${left}_stereo.jpg"
 
-echo -n preparing...
+echo -n calculating geometry...
 geom=$(identify "$left" |sed -rn 's:^.* ([0-9]+x[0-9]+) .*$:\1:gp')
+width=$(echo $geom |cut -dx -f1)
+height=$(echo $geom |cut -dx -f2)
+
+if [ "$vert" -gt 0 ]; then
+  height=$(($height - $vert / 2))
+  lvoff=$(($vert / 3))
+elif [ "$vert" -lt 0 ]; then
+  height=$(($height - $vert / -2))
+  rvoff=$(($vert / -2))
+fi
+if [ "$hor" -gt 0 ]; then
+  width=$(($width - $hor / 2))
+  lhoff=$(($hor / 2))
+elif [ "$hor" -lt 0 ]; then
+  width=$(($width - $hor / -2))
+  rhoff=$(($hor / -2))
+fi
+geom="${width}x${height}"
+lcrop="${geom}+${lhoff}+${lvoff}"
+rcrop="${geom}+${rhoff}+${rvoff}"
+
+echo -n setup streaming...
 tmp=$(tempfile -d /tmp -p strfy)
 rm "$tmp"
 mkfifo "$tmp"
 
-convert "$left" rgb:- >"$tmp" &
+convert "$left" -crop "$lcrop" rgb:- >"$tmp" &
 echo -n anaglyphing...
-convert "$right" rgb:- |anaglyph "$param" "$tmp" /dev/stdin /dev/stdout |convert -depth 8 -size "$geom" rgb:- "$stereo"
+convert "$right" -crop "$rcrop" rgb:- |anaglyph "$param" "$tmp" /dev/stdin /dev/stdout |convert -depth 8 -size "$geom" rgb:- "$stereo"
 
 echo cleaning...
 rm "$tmp"