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diff --git a/grid b/grid
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-#!/bin/bash
-#
-# Developed by Fred Weinhaus 10/22/2007 .......... revised 1/1/2008
-#
-# USAGE: grid [-s spacing] [-c color] [-t thickness] [-o opacity] infile outfile
-# USAGE: grid [-h or -help]
-#
-# OPTIONS:
-#
-# -s        spacing       x,y spacing between grid lines; default=16,16 or 16;
-#                         second number is defaulted to the first
-# -c        color         color of grid lines; default="black"
-# -t        thickness     thickness of grid lines; default=1 
-# -o        opacity       opacity of grid lines opacity between 0.0 and 1.0;
-#                         opacity=0 is transparent; opacity=1 is opaque;
-#                         default=1
-#
-###
-#
-# NAME: GRID 
-# 
-# PURPOSE: To superimpose a set of horizontal and/or vertical grid lines
-# on an image.
-# 
-# DESCRIPTION: GRID superimposes a set of horizontal and/or vertical grid
-# lines on an image. Parameters are available to select the grid line color, 
-# thickness and opacity.
-# 
-# 
-# OPTIONS: 
-# 
-# -s spacing ... SPACING specifies the horizontal (x) and vertical (y) grid 
-# offset between lines. Spacing must be provided as integer values. If the 
-# second value is left off, then it will be set identical to the first. If 
-# only vertical lines are desired, set the horizontal (x) spacing larger 
-# than the width of the image. If only horizontal lines are desired, set 
-# the vertical (y) spacing larger than the height of the image. The default=8.
-# Note: if you want the bottom and/or right grid line to show, then the image 
-# dimension(s) must be a multiple of the grid spacing plus 1.
-# 
-# -c color ... COLOR is the color of the grid lines. Any valid IM color 
-# specification is allowed. Be sure to color values in double quotes. 
-# The default="black".
-#
-# -t thickness ... THICKNESS is the grid line thickness. Values are positive 
-# integers. The default=1
-#
-# -o opacity ... OPACITY is the grid line opacity. Values are non-negative 
-# floats between 0.0 and 1.0. The default=1
-#
-# CAVEAT: No guarantee that this script will work on all platforms, 
-# nor that trapping of inconsistent parameters is complete and 
-# foolproof. Use At Your Own Risk. 
-# 
-######
-#
-
-# set default values
-spacing=16
-color="black"
-thickness=1
-opacity=1
-
-
-# set directory for temporary files
-dir="."    # suggestions are dir="." or dir="/tmp"
-
-
-# set up functions to report Usage and Usage with Description
-PROGNAME=`type $0 | awk '{print $3}'`  # search for executable on path
-PROGDIR=`dirname $PROGNAME`            # extract directory of program
-PROGNAME=`basename $PROGNAME`          # base name of program
-usage1() 
-	{
-	echo >&2 ""
-	echo >&2 "$PROGNAME:" "$@"
-	sed >&2 -n '/^###/q;  /^#/!q;  s/^#//;  s/^ //;  4,$p' "$PROGDIR/$PROGNAME"
-	}
-usage2() 
-	{
-	echo >&2 ""
-	echo >&2 "$PROGNAME:" "$@"
-	sed >&2 -n '/^######/q;  /^#/!q;  s/^#*//;  s/^ //;  4,$p' "$PROGDIR/$PROGNAME"
-	}
-
-
-# function to report error messages
-errMsg()
-	{
-	echo ""
-	echo $1
-	echo ""
-	usage1
-	exit 1
-	}
-
-
-# function to test for minus at start of value of second part of option 1 or 2
-checkMinus()
-	{
-	test=`echo "$1" | grep -c '^-.*$'`   # returns 1 if match; 0 otherwise
-    [ $test -eq 1 ] && errMsg "$errorMsg"
-	}
-
-# test for correct number of arguments and get values
-if [ $# -eq 0 ]
-	then
-	# help information
-   echo ""
-   usage2
-   exit 0
-elif [ $# -gt 10 ]
-	then
-	errMsg "--- TOO MANY ARGUMENTS WERE PROVIDED ---"
-else
-	while [ $# -gt 0 ]
-		do
-			# get parameter values
-			case "$1" in
-		  -h|-help)    # help information
-					   echo ""
-					   usage2
-					   exit 0
-					   ;;
-				-s)    # get spacing
-					   shift  # to get the next parameter - spacing
-					   # test if parameter starts with minus sign 
-					   errorMsg="--- INVALID SPACING SPECIFICATION ---"
-					   checkMinus "$1"
-					   spacing="$1,"
-					   ;;
-				-c)    # get color
-					   shift  # to get the next parameter - lineval
-					   # test if parameter starts with minus sign 
-					   errorMsg="--- INVALID COLOR SPECIFICATION ---"
-					   checkMinus "$1"
-					   # test lineval values
-					   color="$1"
-					   ;;
-				-t)    # get thickness
-					   shift  # to get the next parameter - thickness
-					   # test if parameter starts with minus sign 
-					   errorMsg="--- INVALID THICKNESS SPECIFICATION ---"
-					   checkMinus "$1"
-					   # test width values
-					   thickness=`expr "$1" : '\([0-9]*\)'`
-					   [ "$thickness" = "" -o $thickness -eq 0 ] && errMsg "--- THICKNESS=$thickness MUST BE A POSITIVE INTEGER ---"
-					   ;;
-				-o)    # get opacity
-					   shift  # to get the next parameter - opacity
-					   # test if parameter starts with minus sign 
-					   errorMsg="--- INVALID OPACITY SPECIFICATION ---"
-					   checkMinus "$1"
-					   # test width values
-					   opacity=`expr "$1" : '\([.0-9]*\)'`
-					   [ "$opacity" = "" ] && errMsg "OPACITY=$opacity IS NOT A NON-NEGATIVE FLOATING POINT NUMBER"
-					   opacitytest=`echo "$opacity > 1" | bc`
-					   [ $opacitytest -eq 1 ] && errMsg "OPACITY=$opacity MUST BE BETWEEN 0.0 AND 1.0"
-					   ;;
-				 -)    # STDIN and end of arguments
-					   break
-					   ;;
-				-*)    # any other - argument
-					   errMsg "--- UNKNOWN OPTION ---"
-					   ;;
-				*)     # end of arguments
-					   break
-					   ;;
-			esac
-			shift   # next option
-	done
-	#
-	# get infile and outfile
-	infile=$1
-	outfile=$2
-fi
-
-
-# test that infile provided
-[ "$infile" = "" ] && errMsg "NO INPUT FILE SPECIFIED"
-
-# test that outfile provided
-[ "$outfile" = "" ] && errMsg "NO OUTPUT FILE SPECIFIED"
-
-# setup temporary images and auto delete upon exit
-# use mpc/cache to hold input image temporarily in memory
-tmpA="$dir/profile_$$.mpc"
-tmpB="$dir/profile_$$.cache"
-trap "rm -f $tmpA $tmpB; exit 0" 0
-trap "rm -f $tmpA $tmpB; exit 1" 1 2 3 15
-
-
-#
-if convert -quiet -regard-warnings "$infile" +repage "$tmpA"
-	then
-	: 'do nothing - continue processing below'
-	else
-		errMsg "--- FILE $infile DOES NOT EXIST OR IS NOT AN ORDINARY FILE, NOT READABLE OR HAS ZERO SIZE ---"
-fi
-
-
-# get image dimensions
-width=`identify -format %w $tmpA`
-height=`identify -format %h $tmpA`
-
-width1=`expr $width - 1`
-height1=`expr $height - 1`
-
-xinc=`echo "$spacing" | cut -d, -f1`
-yinc=`echo "$spacing" | cut -d, -f2`
-[ "$yinc" = "" ] && yinc=$xinc
-testx=`expr $xinc : '[0-9]*'`
-testy=`expr $yinc : '[0-9]*'`
-[ $testx -eq 0 -o $testy -eq 0 ] && errMsg "--- SPACING MUST BE AN INTEGER ---"
-
-# get string for drawing grid lines
-drawstr=""
-
-if [ $yinc -le $height ]
-	then	
-	i=0
-	while [ $i -le $height ]
-		do
-		drawstr="$drawstr M 0,$i L $width1,$i"
-		i=`expr $i + $yinc`
-	done
-fi
-
-if [ $xinc -le $width ]
-	then	
-	i=0
-	while [ $i -le $width ]
-		do
-		drawstr="$drawstr M $i,0 L $i,$height1"
-		i=`expr $i + $xinc`
-	done
-fi
-
-# process image
-convert $tmpA -fill none -stroke $color -strokewidth $thickness -draw "stroke-opacity $opacity path '$drawstr'" $outfile
-exit 0