#!/bin/bash

#
# Copyright (c) 2015-2018 Samuel Thibault <samuel.thibault@ens-lyon.org>
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
# 

# Make sure we have enough options
if [ $# != 5 -a $# != 6 ]; then
  echo "ERROR: $0 jobid user name nb options [filename]" >&2
  exit 1
fi

NB=$4
OPTIONS=$5
FILE=$6

OUTPUT_FORMAT=brf

case $0 in
  *imagetoubrl*) OUTPUT_FORMAT=ubrl ;;
esac

. @CUPS_DATADIR@/braille/cups-braille.sh

checkTool convert imagemagick "embossing images"

NEGATE=$(getOption Negate)
case "$NEGATE" in
  True|true)  NEGATE=-negate ;;
  False|false) NEGATE= ;;
  *)
    printf "ERROR: Option Negate must either True or False, got '%s'\n" "$NEGATE" >&2
    exit 1
    ;;
esac

ROTATE=$(getOption Rotate)
case "$ROTATE" in
  90\>|270\>)
    if [ "$GRAPHICWIDTH" -gt "$GRAPHICHEIGHT" ]
    then
      # Landscape paper, rotate to landscape instead of to portrait
      ROTATE=${ROTATE/\>/\<}
    fi
    ;;
  0|90|270|180) ;;
  *)
    printf "ERROR: Option Rotate must be a valid rotation value, got '%s'\n" "$ROTATE" >&2
    exit 1
    ;;
esac

MIRROR=$(getOption mirror)
case "$MIRROR" in
  True|true)   MIRROR="-flop" ;;
  False|false) MIRROR="" ;;
  *)
    printf "ERROR: Option mirror must either True or False, got '%s'\n" "$MIRROR" >&2
    exit 1
    ;;
esac

PAGE="-page ${TOTALGRAPHICWIDTH}x${TOTALGRAPHICHEIGHT}+${GRAPHICHOFFSET}+${GRAPHICVOFFSET}"

RESIZE=$(getOption fitplot)
case "$RESIZE" in
  True|true) RESIZE="-size ${GRAPHICWIDTH}x${GRAPHICHEIGHT} -resize ${GRAPHICWIDTH}x${GRAPHICHEIGHT}" ;;
  False|false) RESIZE="-crop ${GRAPHICWIDTH}x${GRAPHICHEIGHT}+${GRAPHICHOFFSET}+${GRAPHICVOFFSET}" ;;
  *)
    printf "ERROR: Option fitplot must either True or False, got '%s'\n" "$RESIZE" >&2
    exit 1
    ;;
esac

EDGE=$(getOption Edge)
EDGEFACTOR=$(getOptionNumber EdgeFactor)

CANNY_RADIUS=$(getOptionNumber CannyRadius)
CANNY_SIGMA=$(getOptionNumber CannySigma)
CANNY_LOWER=$(getOptionNumber CannyLower)
CANNY_UPPER=$(getOptionNumber CannyUpper)

case $EDGE in
  None)  WORK=$NEGATE;;
  Edge)  WORK="$NEGATE -edge $EDGEFACTOR -negate" ;;
  Canny) WORK="-canny ${CANNY_RADIUS}x${CANNY_SIGMA}+$CANNY_LOWER%+$CANNY_UPPER% -negate" ;;
  *)
    printf "ERROR: Unknown Edge option value '%s'\n" "$EDGE" >&2
    exit 1
    ;;
esac

RENDER_CALL="convert $WORK -rotate $ROTATE $PAGE $RESIZE $MIRROR -flatten - $OUTPUT_FORMAT:-"

# Now proceeed
echo "INFO: Converting image" 1>&2
if [ -z "$FILE" ]
then
  printf "DEBUG: Calling %s from stdin\n" "$RENDER_CALL" 1>&2
  $RENDER_CALL | sed -e '/^\(Width\|X\|Y\): [0-9]*$/,/^$/d' | addmargins
else
  printf "DEBUG: Calling %s on '%s'\n" "$RENDER_CALL" "$FILE" 1>&2
  $RENDER_CALL < "$FILE" | sed -e '/^\(Width\|X\|Y\): [0-9]*$/,/^$/d' | addmargins
fi
echo "INFO: Ready" >&2
