mkroundcorners - script for making round corners for png-images

mkroundcorners

#!/usr/bin/env bash
set -e
if [ $# -ne 3 ]; then
    echo 'mkroundcorners - script for making round corners for png-images.'
    echo 'Usage: mkroundcorners source.png 40 target.png'
    exit 0
fi

SRC=$1
R=$2
DST=$3
MASK=mkroundcorners-tmp-mask.png
W=$(identify -format '%w' ${SRC})
H=$(identify -format '%h' ${SRC})

convert -size "${W}x${H}" xc:none -draw "roundrectangle 0,0,${W},${H},${R},${R}" ${MASK}
convert ${SRC} -matte ${MASK} -compose DstIn -composite ${DST}
rm ${MASK}

echo 'Done'