#!/bin/bash
#
# ps2gif C shell script
# David Manning
# 11 December 1995
#
# This program converts a Postscript file to a gif file.
# It accomplishes this is a couple of steps:
#	1. Convert from ps to ppm file (using Ghostscript and ps2ppm)
#	2. Rotate file.  The Postscript file was written to print
#	   in landscape format.  Now, we need to undo this.
#	3. Convert file from ppm to gif (ppmtogif)
#
# We also extract the total x and y coordinates from the ppm file
# before deleting it.
#
# input:  $1		filename of .ps file
#
# output: $1.gif	gif output file
# 	  $1.tmp	coordinate information of gif file
#
# required programs and files:
#	gs		Ghostscript (convert to ppm)
#	pstoppm.ps	Ghostscript input file
#	pnmrotate	To rotate ps file 90 deg. counterclockwise
#	ppmtogif	Convert ppm file to gif
#
# variables:
# 	XPATH		The path of pnmrotate and ppmtogif
#
# Temporary files:
#	$1.ppm		Output of the ps2ppm conversion.
#	$1.ppm2		Output of pnmrotate.
#	$1.in		Input to Ghostscript command
#----------------------------------------------------------------

#setenv XPATH /usr/bin/X11

#
# Create the $1.in file
#
echo "($1) ppm1run" > $1.in
echo "quit" >> $1.in

# 
# Write (echo) some pretty output
#
echo -n "Converting ps to gif .."

#
# Run Ghostscript
#
gs -q -dNODISPLAY pstoppm.ps < $1.in 2&> /dev/null

#
# more pretty output
#
echo -n ".."

#
# Let's rotate the file 90 degrees counterclockwise
#
/usr/bin/X11/pnmrotate 90 $1.ppm > $1.ppm2 2> /dev/null

#
# more pretty output
#
echo -n ".."

# 
# Let's convert from ppm to gif
#
/usr/bin/X11/ppmtogif $1.ppm2 > $1.gif 2> /dev/null

#
# more pretty output
#
echo -n ".."

#
# Some cleanup is required...
#
rm -f $1.in
rm -f $1.ppm

#
# gotta have the pretty output
#
echo -n ".."

# 
# extract coordinates of gif file
#
#head -2 $1.ppm2 | tail -1 > $1.tmp

# 
# More cleanup work
#
rm $1.ppm2

#
# We're all done!
#
echo "done"