#!/bin/bash
#
# Syntax:  dvi2pdf [-s] [-n] [-x] [-l] [-r] [-b] [-t papersize] [-h]
#                  [-d dir1:dir2:...] filename [...]
#
# Purpose: Transforms .dvi files into .pdf files using dvips with the
#          option -Ppdf -G0 and ps2pdf.
#          Use the -s flag to reduce the intermediate output printed to the 
#          screen while running the script.
#          Use the -n flag to prevent compression of images (note: this
#          will in general increase the size of the file).
#          Use the -x flag to prevent selecting the prepress option.
#          Use the -l flag to select letter paper.
#          Use the -r flag to pass the option -t landscape to dvips 
#          (sometimes required if page size is set manually to landscape
#           in the latex file).
#          Use the -b flag for beamer on A4 landscape.
#          Use the -t flag to specify the paper format (currently recognized
#          formats are a4 (default), letter, a0, and other ghostscript
#          formats). Is it also possible to specify the paper format none
#          (required e.g. for beamer-based presentations).
#          Use the -d flag to specify extra directories to be added to
#          TEXINPUTS.
#          The -h flag shows the help info for this command.
#
# See also: dvips
#
# Note: You may have to include a line like
#       alias dvi2pdf=~/your_bin_dir/dvi2pdf
#       in your login files (e.g., .bashrc) in order to be able to use
#       this command.
#
# Note: If you use -x to prevent selecting the prepress option, base 14
#       may not be embedded, resulting in a smaller file, but some
#       characters may not print or display properly (e.g., \bar{\mu}
#       in combination with the mathptmx package).
#
# Note: If you use beamer with the resize to A4 option, specify -x -t none.
#      

# Created: Mar  3, 2000       by Bart De Schutter
# Last revised: Dec 23, 2015  by Bart De Schutter
#
# See http://www.deschutter.info/util/scripts.html for the latest version of
# this script.

# Status: public
# Category: pdf, latex

dvips_option=""
prepress_option="-dPDFSETTINGS=/prepress"
#
# Note: In ghostscript 9.05 the following options are apparently
#       already active by default; however, we just keep them
#       for robustness.
#
pdf_option="-dCompatibilityLevel=1.4 -dMAxSubsetPct=100 -dSubsetFonts=true"
pdf_option="$pdf_option -dEmbedAllFonts=true"
## -dColorImageResolution=600 pdf_option="-dEncodeColorImages=false"
paper_size="a4"
extra_dirs=""
#
# Options taken from www.paperplaza.net
#
while getopts :hslt:nxrd: option
do
   case "$option" in
      h) sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
         exit 1;;
      s) dvips_option="$dvips_option -q";;
      l) paper_size="letter";;
      t) paper_size=$OPTARG;;
      n) pdf_option="$pdf_option -dAutoFilterColorImages=false \
              -dAutoFilterGrayImages=false \
              -dColorImageFilter=/FlateEncode \
              -dGrayImageFilter=/FlateEncode \
              -dMonoImageFilter=/FlateEncode";;
      x) prepress_option="";;
#      b) paper_size="";;
      r) dvips_option="-t landscape $dvips_option";;
      d) extra_dirs=${OPTARG};;
      :) echo >&2
         echo >&2 "Option -$OPTARG requires an argument."
         echo >&2
         sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
         echo >&2
         exit 1;;
     \?) echo >&2
         echo >&2 "Unknown option: $OPTARG"
         echo >&2
         sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
         exit 1;;
   esac
done
pdf_option="$prepress_option $pdf_option"

shift $(($OPTIND-1))

if [ -n "${extra_dirs}" ]
then
   TEXINPUTS="$TEXINPUTS${extra_dirs}:"
fi

if [[ "$paper_size" != "none" ]]
then
   dvips_option="$dvips_option -t$paper_size"
   pdf_option="$pdf_option -sPAPERSIZE=$paper_size"
fi

if [ $# -eq 0 ];
then 
   echo >&2
   echo >&2 "ERROR: ${0##*/} requires at least 1 input argument."
   echo >&2
   sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
   exit 1
fi

for fname in "$@"
do
   \dvips $dvips_option -Ppdf -j0 \
                        -G0 "${fname%.dvi}.dvi" -o - |
     ps2pdf $pdf_option - "${fname%.dvi}.pdf"
# -Pdownload35 -u ps2pk.map 
# -dEncodeColorImages=false
done