GNU Parallel 实战: Using GNU Parallel + ImageMagick to convert .dds image

dds2webp.sh

#! /bin/bash
# author: ak1ra
# date: 2021-10-29
# using GNU Parallel + ImageMagick to convert .dds image

function magick_convert() {
    # ddsImage/ddsImage000000/CHU_UI_Character_0000_00_00.dds
    src="$1"
    format="$2"
    resize="$3"

    convert_args=""
    if [ -n "$resize" ]; then
        convert_args="$convert_args -resize $resize"
        dest_dir="$(echo $src | cut -d/ -f1).${resize}.${format}"
    else
        dest_dir="$(echo $src | cut -d/ -f1).${format}"
    fi
    test -d "$dest_dir" || mkdir -p "$dest_dir"

    basename="$(basename $src)"
    dest="${dest_dir}/${basename%.*}.${format}"

    echo magick convert $src $convert_args $dest
    if which magick; then
        # If ImageMagick version >= 7.x
        magick convert $src $convert_args $dest
    else
        convert $src $convert_args $dest
    fi
}

srcdir="$1"
format="$2"
resize="$3"

test -n "$srcdir" || srcdir="ddsImage"
test -n "$format" || format="webp"
# test -n "$resize" || resize="512x512"

export -f magick_convert
find $srcdir/ -type f -name '*.dds' | \
    grep -E 'CHU_UI_Character_[0-9]{4}_[0-9]{2}_00\.dds' | \
    parallel magick_convert {} "$format" "$resize"