#!/bin/sh
#
# "$Id$"
#
# CUPS PCL XL/PCL 6 filter script for Ghostscript.
#
# Copyright 2001-2005 by Easy Software Products.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#

# Installation directories...
prefix=/usr/local
exec_prefix=/usr/local
bindir=/usr/local/bin

# Set the library/font path...
GS_LIB="${CUPS_FONTPATH:=/usr/local/share/cups/fonts}"
export GS_LIB

# Determine the PCL XL/PCL 6 driver to use...
if test "x$PPD" != x; then
    colordevice=`grep '^*ColorDevice:' "$PPD" | awk -F: '{print $2}'`
    case "$colordevice" in
	*True* | *true*)
	    device="pxlcolor"
	    ;;
	*)
	    device="pxlmono"
	    ;;
    esac
else
    device="pxlmono"
fi

# Apply PPD settings.

ps_code=
ppd_opts=

resolution=
eval "$(printf "%s" "$5" | sed -nEe 's/.*(^|[[:space:]])Resolution=([0-9.]+(x[0-9.]+)?).*/resolution="${resolution:-\2}"/p')"
if test -e "$PPD"; then
  eval "$(sed -nEe 's/^\*DefaultResolution:[[:space:]]+([0-9.]+(x[0-9.]+)?).*/resolution="${resolution:-\1}"/p' "$PPD")"
fi
echo "DEBUG: Resolution: $resolution" >&2
if test -n "$resolution"; then
  ppd_opts="${ppd_opts:+$ppd_opts }-r$resolution"
fi

pagesize=
eval "$(printf "%s" "$5" | sed -nEe 's/.*(^|[[:space:]])(media|PageSize)=([^[:space:]]+).*/pagesize="${pagesize:-\3}"/p')"
if test -e "$PPD"; then
  eval "$(sed -nEe 's/^\*DefaultPageSize:[[:space:]]+([^[:space:]]+).*/pagesize="${pagesize:-\1}"/p' "$PPD")"
fi
echo "DEBUG: Page size: $pagesize" >&2
width=
height=
if test -n "$pagesize" && test -e "$PPD"; then
  eval "$(sed -nEe 's|^\*PaperDimension[[:space:]]+'"$pagesize"'/[^:]+:[[:space:]]+"([^[:space:]]+)[[:space:]]+([^[:space:]]+)".*|width="\1"; height="\2"|p' "$PPD")"
fi
echo "DEBUG: Width: $width, height: $height" >&2
if test -n "$width"; then
  ppd_opts="${ppd_opts:+$ppd_opts }-dDEVICEWIDTHPOINTS=$width"
fi
if test -n "$height"; then
  ppd_opts="${ppd_opts:+$ppd_opts }-dDEVICEHEIGHTPOINTS=$height"
fi

bl_x=
bl_y=
tr_x=
tr_y=
if test -n "$pagesize" && test -e "$PPD"; then
  eval "$(sed -nEe 's|^\*ImageableArea[[:space:]]+'"$pagesize"'/[^:]+:[[:space:]]+"([^[:space:]]+)[[:space:]]+([^[:space:]]+)[[:space:]]+([^[:space:]]+)[[:space:]]+([^[:space:]]+)".*|bl_x="\1"; bl_y="\2"; tr_x="\3"; tr_y="\4"|p' "$PPD")"
fi
echo "DEBUG: Absolute margins: $bl_x, $bl_y, $tr_x, $tr_y" >&2
margin_l=
margin_b=
margin_r=
margin_t=
if test -n "$width" && test -n "$height" && \
   test -n "$bl_x" && test -n "$bl_y" && \
   test -n "$tr_x" && test -n "$tr_y"; then
  margin_l="$bl_x"
  margin_b="$bl_y"
  margin_r="$(printf "scale=8; (%s)-(%s)\n" "$width" "$tr_x" | bc)"
  margin_t="$(printf "scale=8; (%s)-(%s)\n" "$height" "$tr_y" | bc)"
fi
echo "DEBUG: Relative margins: $margin_l, $margin_b, $margin_r, $margin_t" >&2
if test -n "$margin_l" && test -n "$margin_b" && \
   test -n "$margin_r" && test -n "$margin_t"; then
  ps_code="${ps_code:+$ps_code }<</.HWMargins[$margin_l $margin_b $margin_r $margin_t] /Margins[0 0]>>setpagedevice"
fi

inputslot=
eval "$(printf "%s" "$5" | sed -nEe 's/.*(^|[[:space:]])(InputSlot)=([^[:space:]]+).*/inputslot="${inputslot:-\3}"/p')"
if test -e "$PPD"; then
  eval "$(sed -nEe 's/^\*DefaultInputSlot:[[:space:]]+([^[:space:]]+).*/inputslot="${inputslot:-\1}"/p' "$PPD")"
fi
echo "DEBUG: InputSlot: $inputslot" >&2
inputslot_val=
if test -n "$inputslot" && test -e "$PPD"; then
  eval "$(sed -nEe 's|^\*InputSlot[[:space:]]+'"$inputslot"'/[^:]+:[[:space:]]+"[[:space:]]*<[[:space:]]*<[[:space:]]*/MediaPosition[[:space:]]*([0-9]+)[[:space:]]*>[[:space:]]*>[[:space:]]*setpagedevice[[:space:]]*".*|inputslot_val="\1"|p' "$PPD")"
fi
echo "DEBUG: Value for MediaPosition: $inputslot_val" >&2
if test -n "$inputslot_val"; then
  ppd_opts="${ppd_opts:+$ppd_opts }-dMediaPosition=$inputslot_val"
fi

colormodel=
eval "$(printf "%s" "$5" | sed -nEe 's/.*(^|[[:space:]])(ColorModel)=([^[:space:]]+).*/colormodel="${colormodel:-\3}"/p')"
if test -e "$PPD"; then
  eval "$(sed -nEe 's/^\*DefaultColorModel:[[:space:]]+([^[:space:]]+).*/colormodel="${colormodel:-\1}"/p' "$PPD")"
fi
echo "DEBUG: ColorModel: $colormodel" >&2
if test "$colormodel" = "Gray"; then
    device=pxlmono
fi
colormodel_val=
if test -n "$colormodel" && test -e "$PPD"; then
  eval "$(sed -nEe 's|^\*ColorModel[[:space:]]+'"$colormodel"'/[^:]+:[[:space:]]+"[[:space:]]*<[[:space:]]*<[[:space:]]*/BitsPerPixel[[:space:]]*([0-9]*)[[:space:]]*>[[:space:]]*>[[:space:]]*setpagedevice[[:space:]]*".*|colormodel_val="\1"|p' "$PPD")"
fi
echo "DEBUG: Value for BitsPerPixel: $colormodel_val" >&2
if test -n "$colormodel_val"; then
  ppd_opts="${ppd_opts:+$ppd_opts }-dBitsPerPixel=$colormodel_val"
fi

duplex=
eval "$(printf "%s" "$5" | sed -nEe 's/.*(^|[[:space:]])(Duplex)=([^[:space:]]+).*/duplex="${duplex:-\3}"/p')"
if test -e "$PPD"; then
  eval "$(sed -nEe 's/^\*DefaultDuplex:[[:space:]]+([^[:space:]]+).*/duplex="${duplex:-\1}"/p' "$PPD")"
fi
echo "DEBUG: Duplex: $duplex" >&2
duplex_val=
tumble_val=
if test -n "$duplex" && test -e "$PPD"; then
  eval "$(sed -nEe 's|^\*Duplex[[:space:]]+'"$duplex"'/[^:]+:[[:space:]]+"[[:space:]]*<[[:space:]]*<[[:space:]]*/Duplex[[:space:]]*([^[:space:]]*)[[:space:]]*(/Tumble[[:space:]]*([^[:space:]]*)[[:space:]]*)?>[[:space:]]*>[[:space:]]*setpagedevice[[:space:]]*".*|duplex_val="\1"; tumble_val="\3"|p' "$PPD")"
fi
echo "DEBUG: Value for Duplex: $duplex_val; Value for Tumble: $tumble_val" >&2
if test -n "$duplex_val"; then
  ppd_opts="${ppd_opts:+$ppd_opts }-dDuplex=$duplex_val"
fi
if test -n "$tumble_val"; then
  ppd_opts="${ppd_opts:+$ppd_opts }-dTumble=$tumble_val"
fi


echo "DEBUG: PPD options: $ppd_opts" >&2
echo "DEBUG: PostScript code from options: $ps_code" >&2

# Options we use with Ghostscript...
gsopts="-dQUIET -dPARANOIDSAFER -dNOPAUSE -dBATCH -dNOINTERPOLATE"
gsopts="$gsopts -sDEVICE=$device -sstdout=%stderr"

# See if we have a filename on the command-line...
if [ -n "$6" ]; then
  exec <"$6"
fi

# We read the data into a temporary file as Ghostscript needs this to be
# able to also work with PDF input
tempfiles=
trap 'rm -f $tempfiles' 0 1 2 13 15

ifile=$(mktemp -t gstopxl.XXXXXX)
tempfiles="$tempfiles $ifile"

cat >"$ifile"

echo INFO: Starting GPL Ghostscript `$bindir/gs --version`... 1>&2
echo DEBUG: Running $bindir/gs $gsopts $ppd_opts -sOUTPUTFILE="%stdout" -c "$ps_code" -f "$ifile" 1>&2

# Now run Ghostscript...
$bindir/gs $gsopts $ppd_opts -sOUTPUTFILE="%stdout" -c "$ps_code" -f "$ifile"

#
# End of "$Id$".
#
