#!/bin/bash # # Developed by Fred Weinhaus 4/10/2010 .......... revised 4/25/2015 # # ------------------------------------------------------------------------------ # # Licensing: # # Copyright © Fred Weinhaus # # My scripts are available free of charge for non-commercial use, ONLY. # # For use of my scripts in commercial (for-profit) environments or # non-free applications, please contact me (Fred Weinhaus) for # licensing arrangements. My email address is fmw at alink dot net. # # If you: 1) redistribute, 2) incorporate any of these scripts into other # free applications or 3) reprogram them in another scripting language, # then you must contact me for permission, especially if the result might # be used in a commercial or for-profit environment. # # My scripts are also subject, in a subordinate manner, to the ImageMagick # license, which can be found at: http://www.imagemagick.org/script/license.php # # ------------------------------------------------------------------------------ # #### # # USAGE: chrome [-i intensity] [-n numcycles] [-s smooth] [-a azimuth] # [-e elevation] [-c color] [-b bgcolor] [-d dilation] [-B brightness] # [-C contrast] [-A alpha] infile outfile # USAGE: chrome [-h or -help] # # OPTIONS: # # -i intensity intensity of chrome effect; integer>=0; # default=100 (nominal) # -n numcycles number of cycles in the chrome lookup table; # integer>0; default=2 # -s smooth smoothing amount; float>=0; default=3 # -a azimuth azimuth angle for light source; 0<=integer<=360; # counterclockwise from positive x axis (East); # default=135 (NorthWest) # -e elevation elevation angle for light source; 0<=integer<=90; # upwards from x-y plane; default=45; only for method=1 # -c color color for chrome effect; any valid IM color; # default=no special coloration # -b bgcolor background color outside chrome area; any valid # IM color including none for transparent # -d dilation dilation of alpha channel; integer>=0; default=1 # -B brightness percent brightness change; -100<=integer<=100; # default=0 # -C contrast percent contrast change; -100<=integer<=100; # default=0 # -A alpha alpha channel handling; choices are: off or # extract; if off, the alpha channel is turned off; # if extract, the alpha channel is used in place of # the image; default is no change of input alpha # status # # ### # # NAME: CHROME # # PURPOSE: To apply a chrome effect to a binary image. # # DESCRIPTION: CHROME applies an chrome effect to a binary image. Coloration # is optional. A mostly binary image with antialiasing is OK, but the results # will be slightly different. If the image has an alpha channel, then the # results will be quite different. # # # ARGUMENTS: # # -i intensity ... INTENSITY of chrome effect. This brings out contrast. # Values are integers>=0. The default=100 is the nominal values. # # -n numcycles ... NUMCYCLES is the number of cycles in the chrome look up # table that controls the type of chrome effect. Values are integers>0. # The default=2. # # -s smooth ... SMOOTH is the amount of smoothing to apply to chrome effect. # Values are floats>=0. The default=3. # # -a azimuth ... AZIMUTH is the angle in degrees in the x-y plane measured # counterclockwise from EAST to the light source. Values are integers in the # range 0<=azimuth<=360. The default=135 (NorthWest). # # -e elevation ... ELEVATION is the angle in degrees upwards from the x-y plane # to the light source. Values are integers in the range 0<=elevation<=90. # The default=45. # # -c color ... COLOR is the optional color to apply to the chrome effect. # Any valid IM color is allowed. The default is no additional color on top # of the natural chrome effect. # # -b bgcolor ... BGCOLOR is the optional background color outside the chromed # items. Any valid IM color is allowed including none for transparency. # The default is no special background color. # # -d dilation ... DILATION of alpha channel when bgcolor is specified. # Values are integers>=0. The default=1. # # -B brightness ... percent BRIGHTNESS change. Values are -100<=integer<=100. # The default=0. # # -C contrast ... percent CONTRAST change; Values are -100<=integer<=100. The # default=0. # # -A alpha ... ALPHA channel handling. The choices are: off (o) or extract (e). # If off, then the alpha channel is turned off and the image is used alone. # If extract, then the alpha channel is used in place of the base image. The # default is no change of input image alpha status. # # REQUIREMENTS: IM 6.4.8-9 in order to support -function sinusoid. # # 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 smooth=3 #smoothing factor; float>=0 azimuth=135 #azimuth angle; 0<=integer<=360 elevation=45 #elevation angle: 0<=integer<=90 intensity=100 #intensity; integer>=0 numcycles=2 #number cycles; integer>0 color="" #color for chrome bgcolor="" #background color dilation=1 #dilation of alpha channel; integer>=0 brightness=0 #percent brightness adjustment contrast=0 #percent contrast adjustment alpha="" #alpha channel handling # 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:" "$@" sed >&2 -e '1,/^####/d; /^###/g; /^#/!q; s/^#//; s/^ //; 4,$p' "$PROGDIR/$PROGNAME" } usage2() { echo >&2 "" echo >&2 "$PROGNAME:" "$@" sed >&2 -e '1,/^####/d; /^######/g; /^#/!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 24 ] 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 ;; -i) # get intensity shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID INTENSITY SPECIFICATION ---" checkMinus "$1" intensity=`expr "$1" : '\([0-9]*\)'` [ "$intensity" = "" ] && errMsg "--- INTENSITY=$intensity MUST BE A NON-NEGATIVE INTEGER ---" ;; -n) # get numcycles shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID NUMCYCLES SPECIFICATION ---" checkMinus "$1" numcycles=`expr "$1" : '\([0-9]*\)'` [ "$numcycles" = "" ] && errMsg "--- NUMCYCLES=$numcycles MUST BE A NON-NEGATIVE INTEGER ---" test=`echo "$numcycles < 1" | bc` [ $test -eq 1 ] && errMsg "--- NUMCYCLES=$numcycles MUST BE A POSITIVE INTEGER ---" ;; -s) # get smooth shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID SMOOTH SPECIFICATION ---" checkMinus "$1" smooth=`expr "$1" : '\([.0-9]*\)'` [ "$smooth" = "" ] && errMsg "--- SMOOTH=$smooth MUST BE A NON-NEGATIVE FLOAT ---" ;; -a) # get azimuth shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID AZUMUTH SPECIFICATION ---" checkMinus "$1" azimuth=`expr "$1" : '\([0-9]*\)'` [ "$azimuth" = "" ] && errMsg "--- AZUMUTH=$azimuth MUST BE A NON-NEGATIVE INTEGER VALUE (with no sign) ---" test1=`echo "$azimuth < 0" | bc` test2=`echo "$azimuth > 360" | bc` [ $test1 -eq 1 -o $test2 -eq 1 ] && errMsg "--- AZUMUTH=$azimuth MUST BE AN INTEGER BETWEEN 0 AND 360 ---" ;; -e) # get elevation shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID ELEVATION SPECIFICATION ---" checkMinus "$1" elevation=`expr "$1" : '\([0-9]*\)'` [ "$elevation" = "" ] && errMsg "--- ELEVATION=$elevation MUST BE A NON-NEGATIVE INTEGER VALUE (with no sign) ---" test1=`echo "$elevation < 0" | bc` test2=`echo "$elevation > 90" | bc` [ $test1 -eq 1 -o $test2 -eq 1 ] && errMsg "--- ELEVATION=$elevation MUST BE AN INTEGER BETWEEN 0 AND 90 ---" ;; -c) # get color shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID COLOR SPECIFICATION ---" checkMinus "$1" color="$1" ;; -b) # get bgcolor shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID BGCOLOR SPECIFICATION ---" checkMinus "$1" bgcolor="$1" ;; -d) # get dilation shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID DILATION SPECIFICATION ---" checkMinus "$1" dilation=`expr "$1" : '\([0-9]*\)'` [ "$dilation" = "" ] && errMsg "--- DILATION=$dilation MUST BE A NON-NEGATIVE INTEGER ---" ;; -B) # get brightness shift # to get the next parameter # test if parameter starts with minus sign #errorMsg="--- INVALID BRIGHTNESS SPECIFICATION ---" #checkMinus "$1" brightness=`expr "$1" : '\([-]*[.0-9]*\)'` [ "$brightness" = "" ] && errMsg "--- BRIGHTNESS=$brightness MUST BE AN INTEGER ---" testA=`echo "$brightness < -100" | bc` testB=`echo "$brightness > 100" | bc` [ $testA -eq 1 -o $testB -eq 1 ] && errMsg "--- BRIGHTNESS=$brightness MUST BE AN INTEGER BETWEEN -100 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 AN INTEGER ---" testA=`echo "$contrast < -100" | bc` testB=`echo "$contrast > 100" | bc` [ $testA -eq 1 -o $testB -eq 1 ] && errMsg "--- CONTRAST=$contrast MUST BE AN INTEGER -100 AND 100 ---" ;; -A) # get alpha shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID ALPHA SPECIFICATION ---" checkMinus "$1" alpha="$1" alpha=`echo "$alpha" | tr "[:upper:]" "[:lower:]"` case "$alpha" in off|o) alpha="off" ;; extract|e) alpha="extract" ;; *) errMsg "--- ALPHA=$alpha IS AN INVALID 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 [ "$outfile" = "" ] && errMsg "NO OUTPUT FILE SPECIFIED" # setup temporary images and auto delete upon exit tmpA1="$dir/chrome_1_$$.mpc" tmpB1="$dir/chrome_1_$$.cache" tmpA2="$dir/chrome_2_$$.mpc" tmpB2="$dir/chrome_2_$$.cache" tmpA3="$dir/chrome_3_$$.mpc" tmpB3="$dir/chrome_3_$$.cache" tmpA4="$dir/chrome_3_$$.mpc" tmpB4="$dir/chrome_3_$$.cache" trap "rm -f $tmpA1 $tmpB1 $tmpA2 $tmpB2 $tmpA3 $tmpB3 $tmpA4 $tmpB4;" 0 trap "rm -f $tmpA1 $tmpB1 $tmpA2 $tmpB2 $tmpA3 $tmpB3 $tmpA4 $tmpB4; exit 1" 1 2 3 15 trap "rm -f $tmpA1 $tmpB1 $tmpA2 $tmpB2 $tmpA3 $tmpB3 $tmpA4 $tmpB4; exit 1" ERR # set up alpha channel handling if [ "$alpha" = "off" ]; then aproc="-alpha off" elif [ "$alpha" = "extract" ]; then aproc="-alpha extract" else aproc="" fi # read the input image and filter image into the temp files and test validity. convert -quiet "$infile" $aproc +repage "$tmpA1" || errMsg "--- FILE $infile DOES NOT EXIST OR IS NOT AN ORDINARY FILE, NOT READABLE OR HAS ZERO SIZE ---" # get IM version im_version=`convert -list configure | \ sed '/^LIB_VERSION_NUMBER */!d; s//,/; s/,/,0/g; s/,0*\([0-9][0-9]\)/\1/g' | head -n 1` [ "$im_version" -lt "06040809" ] && errMsg "--- IM VERSION IS NOT COMPATIBLE ---" amp0=`convert xc: -format "%[fx:$intensity/100]" info:` amp1=`convert xc: -format "%[fx:$amp0/($amp0+1)]" info:` amp2=`convert xc: -format "%[fx:1/($amp0+1)]" info:` cyc=`convert xc: -format "%[fx:0.5+$numcycles]" info:` # create lut convert \( -size 1x100 gradient: -rotate 90 \) \ \( -clone 0 -function sinusoid $cyc,-90,0.5,0.5 \) \ \( -clone 1 -evaluate multiply $amp1 \) \ \( -clone 0 -evaluate multiply $amp2 \) \ -delete 0,1 -compose plus -composite \ $tmpA2 # set up levelcolors if [ "$color" = "" ]; then colorize="" else colorize="+level-colors black,${color}" fi # set up stretch if [ "$im_version" -lt "06050501" ]; then stretch="-contrast-stretch 0" else stretch="-auto-level" fi # create chrome image convert $tmpA1 -colorspace gray -blur 0x$smooth \ -shade ${azimuth}x${elevation} $stretch $tmpA3 convert $tmpA3 $tmpA2 -clut $colorize $tmpA4 # process background if needed if [ "$bgcolor" = "" ]; then convert $tmpA4 "$outfile" else # set up bgcolorize if [ "$bgcolor" = "none" -o "$bgcolor" = "transparent" ]; then bgcolorize="" else bgcolorize="-compose over -background $bgcolor -flatten" fi # set up dilation if [ "$dilation" != "0" ]; then dilating="-morphology dilate octagon:$dilation" else dilating="" fi # set up brightness/contast if [ "$brightness" = "0" -a "$contrast" = "0" ]; then bricon="" else bricon="-brightness-contrast ${brightness},${contast}" fi convert \( $tmpA4 $bricon \) \( $tmpA1 $dilating \) \ -alpha off -compose copy_opacity -composite $bgcolorize "$outfile" fi exit 0