#!/bin/sh
#
#	Raster3D labeling script label3d V2.7a
#       ======================================
#
# Ethan A Merritt  April 2002
#
# Usage
#	label3d  -tiff [outfile.tiff] < inputfile.r3d > file_with_labels.tiff
#	label3d [-png  [outfile.png]] < inputfile.r3d > file_with_labels.png
#
# Environmental variables
#	FONTSCALE controls mapping of nominal font size to height in pixels
#	TMPDIR controls where scratch files will be written
#
# Changes 
#	- 2.6d is a fairly major change; the older version is label3d_old
#	- output to stdout, rather than always to a file ./label3d.tiff
#	- temporary files are placed in $TMPDIR if defined, else /usr//tmp
#	- together these changes mean you can run label3d from a directory
#	  for which you do not have write access
#	- add -png option (tiff is still the default)
#	- 2.6g default to png
#
# Requirements
#	- Requires ghostscript and ImageMagick.
#	  ImageMagick behavior is version-dependent (fooey on them!)
#	    so you may have to edit this script if you update ImageMagick
#	    currently known to work for V2.4.9 and V5.3.2
#	- Depending on what size images you typically produce, 
#	  you might want to change the default FONTSCALE definition below
#
if [ ! "$FONTSCALE" ]; then FONTSCALE=3.0; fi

#
# Construct base name for scratch files
#
#echo "DEBUG TMPDIR is $TMPDIR"  1>&2
if [ "$TMPDIR" ]; then
    tmp=$TMPDIR/$$
else
    tmp=/usr/tmp/$$
fi
#echo "DEBUG scratch files to $tmp"  1>&2

#
# Parse command line options (currently only -png)
#
unset outfile
unset img
previous=

for option in $*
do
if   [ "$option" = "-png"    ]; then img=png;
elif [ "$option" = "-tiff"   ]; then img=tiff;
else
    if [ "$previous" = "-tiff" ] || [ "$previous" = "-png" ] ; then
        if [ `echo "$option" | sed -e 's/\(.\).*/\1/'` != "-" ]; then
            outfile="$option"
        fi
    else
	echo "label3d version 2.7a"
        echo "unrecognized option: $option" 1>&2
	echo "Usage:  label3d [-tiff [out.tiff]] [-png [out.png]] < in.r3d > outfile" 
	exit -1 
    fi
fi
previous="$option"
done

if [ "$img" != "tiff" ]; then
    img=png
fi


#DEBUG
#  if [ "$outfile" ]; then 
#	echo "DEBUG label3d: $img output to $outfile"  1>&2
#  else
#	echo "DEBUG label3d: $img output to stdout"  1>&2
#  fi
#DEBUG

#
# Buffer input to scratch file
#
cat > ${tmp}_label3d.tmp

#
#
rm -f ${tmp}_render.${img} ${tmp}_label3d.ps
render -labels ${tmp}_label3d.ps -fontscale $FONTSCALE -${img} ${tmp}_render.${img} < ${tmp}_label3d.tmp
if [ ! -e ${tmp}_render.${img} ]; then 
   echo "label3d: could not find output  ${tmp}_render.${img} from render" 1>&2
   rm -f ${tmp}_*
   exit -1 
fi 
if [ ! -e ${tmp}_label3d.ps ]; then
   cat ${tmp}_render.${img}
   echo "label3d: no labels found" 1>&2
   rm -f ${tmp}_*
   exit 0
fi

#
IMAGESIZE=`identify ${tmp}_render.${img} | sed -e 's/.* \([0-9]*x[0-9]*\).*/\1/'`

if ( gs -sDEVICE=png16m -dNOPAUSE -q -sOutputFile=${tmp}_label3d.png \
   -g$IMAGESIZE ${tmp}_label3d.ps -c quit ) 
then
   echo "label3d: labels written to ${tmp}_label3d.png" 1>&2
else
   echo "label3d: GhostScript error" 1>&2
   rm -f ${tmp}_*
   exit -1
fi

#
# Insure that the labels are on a transparent background
# NB: ImageMagick version 6+ syntax!
#
   convert  ${tmp}_label3d.png -fill none -draw "matte 0,0 replace" ${tmp}_label3d.miff
#
# This works with ImageMagick 4.2.9 and many (most?) other older versions
#
if ( combine -compose over \
        ${tmp}_render.${img} ${tmp}_label3d.miff ${tmp}_label3d.${img} 2>/dev/null)
then
   echo "label3d: using combine" 1>&2
#
# This works with ImageMagick 5.3.2
#
else
   echo "label3d: using composite instead of combine" 1>&2
   composite -compose over ${tmp}_label3d.miff ${tmp}_render.${img} ${tmp}_label3d.${img}
fi

#
# output to explicit file or to stdout
#
if [ "$outfile" ]; then
   mv  ${tmp}_label3d.${img} $outfile
else
   cat ${tmp}_label3d.${img}
fi

#
# Cleanup
#
# echo "label3d: cleanup" 1>&2
rm -f ${tmp}_label3d.ps ${tmp}_label3d.${img}
rm -f ${tmp}_label3d.tmp ${tmp}_label3d.png ${tmp}_label3d.miff ${tmp}_render.${img}

exit 0