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+#!/bin/bash
+#
+# Developed by Fred Weinhaus 7/16/2010 .......... revised 6/30/2011
+# 
+# USAGE: bevelborder [-s size] [-m method] [-p percent] [-c contrast] [-b bcolor] [-a amount] [-t type] infile outfile
+# USAGE: bevelborder [-h or -help]
+# 
+# OPTIONS:
+# 
+# -s      size              size of border in pixels; same in both dimensions; 
+#                           default equals 10% of min(imagewidth, imageheight)
+# -m      method            bevel method; choices are: outer, inner or split;
+#                           default=outer
+# -p      percent           split percent between outer and inner bevel; 
+#                           100 is outer bevel only; 0 is inner bevel only;
+#                           default=50 applies only to method=split
+# -c      contrast          contrast percent for bevel; 0<=integer<=100; 
+#                           default=50
+# -b      bcolor            border coloring; any IM opaque color is allowed; 
+#                           default is no coloring
+# -a      amount            amount of border coloring; 0<=integer<=100; 
+#                           default=25
+# -t      type              type of compose; hardlight, linearlight or 
+#                           vividlight; default=hardlight
+# 
+###
+# 
+# NAME: BEVELBORDER 
+# 
+# PURPOSE: To applies a bevel effect to the border of an image.
+# 
+# DESCRIPTION: BEVELBORDER applies a bevel effect to the border of an image. 
+# The bevel can be an outer bevel (raised effect), an inner bevel (depressed 
+# effect) or a split (mix) of the two. The border may also be colorized.
+# 
+# 
+# ARGUMENTS: 
+# 
+# -s size ... SIZE is the dimensions of the border region in pixels. The same 
+# value is used in both dimensions. Values are integers greater than 0. The 
+# default is 10% of the min(width,height) of the image.
+# 
+# -m method ... METHOD is the bevel method. Choices are: outer, which makes a
+# raised effect; inner, which makes a depressed effect; and split, which is 
+# part raised and part depressed. The amount of each is controlled by the 
+# percent argument. The default is outer.
+# 
+# -p percent ... PERCENT is the percent split between outer and inner bevels.
+# Values are integers such that 0<=percent<=100. A value of 100 is full outer 
+# bevel. A value of 0 is full inner bevel. The default is 50 and only applies 
+# when the method=split.
+# 
+# -c contrast ... CONTRAST percent for innerbevel or outerbevel. Values are
+# integers between 0 and 100. The default=50.
+# 
+# -b bcolor ... BCOLOR is the bevel colorization color. Any valid opaque IM 
+# color is allowed. The default is no additional colorization.
+# 
+# -a amount ... AMOUNT of colorization. Values are integers between 0 and 100. 
+# The default=25.
+#
+# -t type ... TYPE of compose. Choices are: hardlight, linearlight and 
+# vividlight. The default=hardlight
+# 
+# REQUIREMENTS: IM 6.5.9.0 or higher due to the use of -brightness-contrast.
+# 
+# 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
+size=""					# bevel border amount in pixels
+method="outer"			# outer, inner, split
+percent=50				# split percent; 0 to 100; 100 is outer; 0 is inner
+contrast=50				# bevel contrast percent
+bcolor=""				# bevel color
+amount=25				# amount of coloring; 0<=integer<=100
+type="hardlight"	    # bevel compose method
+
+# 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 16 ]
+	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 size
+					   shift  # to get the next parameter
+					   # test if parameter starts with minus sign 
+					   errorMsg="--- INVALID SIZE SPECIFICATION ---"
+					   checkMinus "$1"
+					   size=`expr "$1" : '\([0-9]*\)'`
+					   [ "$size" = "" ] && errMsg "--- SIZE=$size MUST BE A NON-NEGATIVE INTEGER VALUE (with no sign) ---"
+					   testA=`echo "$size <= 0" | bc`
+					   [ $testA -eq 1 ] && errMsg "--- SIZE=$size MUST BE A POSITIVE INTEGER ---"
+					   ;;
+				-m)    # get method
+					   shift  # to get the next parameter
+					   # test if parameter starts with minus sign
+					   errorMsg="--- INVALID METHOD SPECIFICATION ---"
+					   checkMinus "$1"
+					   # test type values
+					   method=`echo "$1" | tr "[:upper:]" "[:lower:]"`
+					   case "$method" in
+							outer|inner|split) ;; # do nothing - valid type
+							*)  errMsg "--- METHOD=$method IS NOT A VALID VALUE ---" ;;
+					   esac
+					   ;;
+				-p)    # get percent
+					   shift  # to get the next parameter
+					   # test if parameter starts with minus sign 
+					   errorMsg="--- INVALID PERCENT SPECIFICATION ---"
+					   checkMinus "$1"
+					   percent=`expr "$1" : '\([0-9]*\)'`
+					   [ "$percent" = "" ] && errMsg "--- PERCENT=$percent MUST BE A NON-NEGATIVE INTEGER ---"
+					   testA=`echo "$percent < 0" | bc`
+					   testB=`echo "$percent > 100" | bc`
+					   [ $testA -eq 1 -o $testB -eq 1 ] && errMsg "--- PERCENT=$percent MUST BE AN INTEGER BETWEEN 0 AND 100 ---"
+					   ;;
+				-c)    # get contrast
+					   shift  # to get the next parameter
+					   # test if parameter starts with minus sign 
+					   errorMsg="--- INVALID CONTRAST SPECIFICATION ---"
+					   checkMinus "$1"
+					   contrast=`expr "$1" : '\([0-9]*\)'`
+					   [ "$contrast" = "" ] && errMsg "--- CONTRAST=$contrast MUST BE A NON-NEGATIVE INTEGER ---"
+					   testA=`echo "$contrast < 0" | bc`
+					   testB=`echo "$contrast > 100" | bc`
+					   [ $testA -eq 1 -o $testB -eq 1 ] && errMsg "--- CONTRAST=$contrast MUST BE AN INTEGER BETWEEN 0 AND 100 ---"
+					   ;;
+				-b)    # get bcolor
+					   shift  # to get the next parameter
+					   # test if parameter starts with minus sign 
+					   errorMsg="--- INVALID BCOLOR SPECIFICATION ---"
+					   checkMinus "$1"
+					   bcolor="$1"
+					   ;;
+				-a)    # get amount
+					   shift  # to get the next parameter
+					   # test if parameter starts with minus sign 
+					   errorMsg="--- INVALID AMOUNT SPECIFICATION ---"
+					   checkMinus "$1"
+					   amount=`expr "$1" : '\([0-9]*\)'`
+					   [ "$amount" = "" ] && errMsg "--- AMOUNT=$amount MUST BE A NON-NEGATIVE INTEGER ---"
+					   testA=`echo "$amount < 0" | bc`
+					   testB=`echo "$amount > 100" | bc`
+					   [ $testA -eq 1 -o $testB -eq 1 ] && errMsg "--- AMOUNT=$amount MUST BE AN INTEGER BETWEEN 0 AND 100 ---"
+					   ;;
+				-t)    # get type
+					   shift  # to get the next parameter
+					   # test if parameter starts with minus sign
+					   errorMsg="--- INVALID TYPE SPECIFICATION ---"
+					   checkMinus "$1"
+					   # test type values
+					   type=`echo "$1" | tr "[:upper:]" "[:lower:]"`
+					   case "$type" in
+							hardlight|linearlight|vividlight) ;; # do nothing - valid type
+							*)  errMsg "--- METHOD=$method IS NOT A VALID VALUE ---" ;;
+					   esac
+					   ;;
+				 -)    # 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
+[ "$outfile" = "" ] && errMsg "NO OUTPUT FILE SPECIFIED"
+
+
+tmpA="$dir/bevelborder_$$.mpc"
+tmpB="$dir/bevelborder_$$.cache"
+trap "rm -f $tmpA $tmpB; exit 0" 0
+trap "rm -f $tmpA $tmpB; exit 1" 1 2 3 15
+
+
+# read the input image into the TMP cached image.
+convert -quiet -regard-warnings "$infile" +repage "$tmpA" ||
+  errMsg "--- FILE $infile NOT READABLE OR HAS ZERO SIZE ---"
+
+# set default size
+if [ "$size" = "" ]; then
+	size=`convert $tmpA -ping -format "%[fx:floor(0.1*min(w,h))]" info:`
+	wsize=$size
+	hsize=$size
+fi
+
+# get input image size
+ww=`convert $infile -ping -format "%w" info:`
+hh=`convert $infile -ping -format "%h" info:`
+wd=`convert xc: -format "%[fx:$ww-2*$size]" info:`
+ht=`convert xc: -format "%[fx:$hh-2*$size]" info:`
+
+# adjust contrast and transparency to fractions
+contr1=`convert xc: -format "%[fx:$contrast-100]" info:`
+
+# setup bevel parameters
+if [ "$method" = "outer" ]; then
+	wsize2=$size
+	hsize2=0
+elif [ "$method" = "inner" ]; then
+	hsize2=$size
+	wsize2=0
+elif [ "$method" = "split" ]; then
+	wsize2=`convert xc: -format "%[fx:floor($percent*$size/100)]" info:`
+	hsize2=$(($size-$wsize2))
+fi
+echo "ww=$ww; hh=$hh; wd=$wd; ht=$ht; wsize2=$wsize2; hsize2=$hsize2"
+
+if [ "$bcolor" = "" ]; then
+	colorize=""
+else
+	colorize="-fill $bcolor -colorize $amount%"
+fi
+
+# process image
+convert $tmpA -size ${wd}x${ht} xc:"gray(50%)" \
+\( -clone 1 -frame ${size}x${size}+${wsize2}+${hsize2} \
+-auto-level -black-threshold 25% -white-threshold 75% $colorize \
+-brightness-contrast 0,${contr1}%  \
+-clone 1 -gravity center -composite \) \
+-delete 1 -compose $type -composite \
+$outfile
+
+exit 0
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