189 lines
5.1 KiB
Bash
Executable File
189 lines
5.1 KiB
Bash
Executable File
#!/bin/bash
|
|
#
|
|
# Developed by Fred Weinhaus 5/8/2008 .......... 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: pixelize [-s size] [-m mode] infile outfile
|
|
# USAGE: pixelize [-h or -help]
|
|
#
|
|
# OPTIONS:
|
|
#
|
|
# -s size pixelization size; size>0; default=3
|
|
# -m mode mode of minimizing; 1=resize; 2=sample; default=1
|
|
#
|
|
###
|
|
#
|
|
# NAME: PIXELIZE
|
|
#
|
|
# PURPOSE: To create a pixelized or blocky effect in an image.
|
|
#
|
|
# DESCRIPTION: PIXELIZE creates a pixelized or blocky effect in an
|
|
# image where more pixelization (larger sizes) create larger blocky
|
|
# effects.
|
|
#
|
|
# OPTIONS:
|
|
#
|
|
# -s size ... SIZE is the pixelization (block) size. Values are greater
|
|
# than 0. The default is 3.
|
|
#
|
|
# -m mode ... MODE is the mode of minimizing. Choices are 1 for -resize
|
|
# and 2 for -sample. 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
|
|
size=3
|
|
mode=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:" "$@"
|
|
sed >&2 -e '1,/^####/d; /^###/g; /^#/!q; s/^#//; s/^ //; 4,$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 6 ]
|
|
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 - scale
|
|
# test if parameter starts with minus sign
|
|
errorMsg="--- INVALID SIZE SPECIFICATION ---"
|
|
checkMinus "$1"
|
|
size=`expr "$1" : '\([0-9]*\)'`
|
|
[ "$size" = "" ] && errMsg "SIZE=$size MUST BE AN INTEGER"
|
|
sizetest=`echo "$size <= 0" | bc`
|
|
[ $sizetest -eq 1 ] && errMsg "--- SIZE=$size MUST BE A POSITIVE INTEGER ---"
|
|
;;
|
|
-m) # get mode
|
|
shift # to get the next parameter - mode
|
|
# test if parameter starts with minus sign
|
|
errorMsg="--- INVALID MODE SPECIFICATION ---"
|
|
checkMinus "$1"
|
|
mode=`expr "$1" : '\([0-9]*\)'`
|
|
[ "$mode" = "" ] && errMsg "MODE=$mode MUST BE AN INTEGER"
|
|
[ $mode -ne 1 -a $mode -ne 2 ] && errMsg "--- MODE=$mode MUST BE EITHER 1 OR 2 ---"
|
|
;;
|
|
-) # 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"
|
|
|
|
|
|
# test if image an ordinary, readable and non-zero size
|
|
if [ -f $infile -a -r $infile -a -s $infile ]
|
|
then
|
|
: 'Do Nothing'
|
|
else
|
|
errMsg "--- FILE $infile DOES NOT EXIST OR IS NOT AN ORDINARY FILE, NOT READABLE OR HAS ZERO SIZE ---"
|
|
fi
|
|
|
|
# get parameters
|
|
w=`convert $infile -format "%[fx:w]" info:`
|
|
h=`convert $infile -format "%[fx:h]" info:`
|
|
minify=`convert xc: -format "%[fx:100/$size]" info:`
|
|
|
|
# process image
|
|
if [ $mode -eq 1 ]; then
|
|
convert $infile -resize $minify% -scale ${w}x${h}! "$outfile"
|
|
elif [ $mode -eq 2 ]; then
|
|
convert $infile -sample $minify% -scale ${w}x${h}! "$outfile"
|
|
fi
|
|
exit 0
|