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thebaer/normalizeicons.sh

Created September 1, 2014 04:53
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  1. thebaer created this gist Sep 1, 2014.
    36 changes: 36 additions & 0 deletions normalizeicons.sh
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    #!/bin/bash

    # Make the given file(s) the given dimension, by extending the canvas, rather
    # than scaling. Made especially for PNGs, since it makes the background
    # transparent and all. This programmer in particular has found it useful for
    # different-sized icons that end at their exact boundaries, causing headaches
    # when developing Android apps.

    # Name some args
    FINALSIZE=$1

    # Gotta have some parameters to continue
    # First parameter should be image dimensions, i.e. contain 'x' in the middle.
    if [ -z "$FINALSIZE" ] || [[ $FINALSIZE != *x* ]]; then
    if [[ $FINALSIZE != *x* ]]; then
    echo "desired-size not given!"
    fi
    echo "usage: normalizeicons.sh desired-size file [file2 ...]"
    echo " desired-size: Desired image dimensions, e.g. 164x120"
    echo
    exit 1
    fi

    # Make sure we've got the magic butter
    hash convert 2>/dev/null || { echo >&2 "MISSING convert COMMAND! INSTALL ImageMagick TO CONTINUE."; echo; exit 1; }

    for INFILE in ${@:2}; do
    FILENAME=$(basename $INFILE)

    # Do the stuff
    # If your grays are fine, use this. Otherwise comment out, and use command below.
    convert $INFILE -background transparent -gravity center -extent $FINALSIZE $FILENAME

    # Sometimes this script messes up grays in your PNGs. If so, uncomment this:
    #convert $INFILE -define png:big-depth=16 -define png:color-type=6 -background transparent -gravity center -extent $FINALSIZE $FILENAME
    done