#!/bin/bash

#*****************************************************#
# Script for making image files from lilypond source  #
# suitable for use as musical examples to insert in a #
# document or web page.                               #
#*****************************************************#

# get filename from first argument
srcfile="`basename $1`"	

# get filename without .ly extension
STEM="`basename $1 .ly`"

# determine output directory
OUTDIR="`dirname $1`"

# ask for output resolution 
echo -n "Enter output resolution in DPI (72, 100, 300, 600, etc.): "
# gather resolution input
read RES

echo -n "Would you like a transparent background? (yes or no): "
read TRANSPARENCY

if [ "$TRANSPARENCY" == "yes" ]
  then
    echo -n "Enter desired output format (png or gif): "
    read TRANSFORMAT
    cd $OUTDIR
    lilypond --format=png -dresolution=$RES $srcfile
    pngtopnm $STEM.png > $STEM.pnm
    pnmcrop -white $STEM.pnm > $STEM-cropped.pnm
    ppmto$TRANSFORMAT -transparent '#ffffff' $STEM-cropped.pnm > $STEM.$TRANSFORMAT
    eog $STEM.$TRANSFORMAT &

  else
    
    # ask for desired final output format
    echo -n "Enter desired output format (jpeg, png, tiff, gif, pcx, bmp): "
    # gather format input
    read FORMAT

    cd $OUTDIR
    lilypond --format=png -dresolution=$RES $srcfile
    pngtopnm $STEM.png > $STEM.pnm
    pnmcrop -white $STEM.pnm > $STEM-cropped.pnm
    ppmto$FORMAT $STEM-cropped.pnm > $STEM.$FORMAT
    # open final image as background process in "Eye of Gnome" Image Viewer
    eog $STEM.$FORMAT &
fi


# removes pnm and ps files
rm *.pnm $STEM.ps