gistfile1.sh

#!/bin/bash
set -e
set -u
set -x

## USAGE
# $ cd azur_lane
# $ ./gistfile1.sh

## DIRECTORY
# azur_lane/
# |-- gistfile1.sh
# |-- 駆逐
# |   |-- 000.png
# |   `-- 001.png
# |-- 軽巡
# |-- 重巡
# |-- 戦艦
# `-- 空母

# 画像の横幅（デフォルト：480px）
card_width=${card_width:-480}
# 画像の列数（デフォルト：8）
card_columns=${card_columns:-8}

# ナンバリング用フォント
font1_family="Stencil-Cargo-Army"
font1_color="#1118"
font1_size="96"
font1_offset="+8+48"

# タイトル用フォント
font2_family="Stencil-WW-II"
font2_color="#eee8"
font2_size="128"
font2_offset="+0+8"

background="-define gradient:angle=160 gradient:#169-#111"

gen(){( srcroot=${1:?} title=${2:?} output=${3:?}
    test -d "${srcroot}"

    tmpdir=`mktemp -d`/
    test "${tmpdir}" != "/"

    (
        cd "${srcroot}"
        for f in *.png
        do
            test -f "${f}" || continue
    
            convert \
                \( \
                    "${f}" \
                    -gravity NorthWest \
                    -font       "${font1_family}" \
                    -pointsize  "${font1_size}" \
                    -fill       "${font1_color}" \
                    -annotate   "${font1_offset}" "${f%.*}" \
                    -filter Lanczos2Sharp -resize ${card_width}x \
                \) \
                \( +clone -background black -shadow 40x2 \) +swap \
                +repage -gravity Center -composite \
                ${tmpdir}"${f%.*}"_tmp.png \
            & sleep 0.1
        done
        wait
    )

    montage ${tmpdir}*.png \
        -tile ${card_columns}x \
        -geometry +4+4 \
        -background none \
        miff:- \
    | convert fd:0 \
        -gravity North -background none -splice x128 \
        -gravity NorthWest \
        -font      "${font2_family}" \
        -fill      "${font2_color}" \
        -pointsize "${font2_size}" \
        -annotate  "${font2_offset}" "${title}" \
        "${output}"

    rm -r "${tmpdir}"
)}

combine(){( : ${1:?} # File names
    combine_func(){( : ${1:?} # File names
        montage "${@}" \
            -tile 1 \
            -geometry +4+4 \
            -background none \
            miff:- \
        | convert fd:0 \
            -trim \
            -bordercolor none \
            -border 32 \
            miff:-
    )}

    eval `combine_func "${@}" | identify -format "w=%w h=%h" fd:0`

    combine_func "${@}" \
    | convert \
        \( \
            \( -size ${w}x${h} ${background} \) \
            \( -size 32x32 xc: +noise random -virtual-pixel tile -blur 0x4 -level +40% -resize ${w}x${h}\! \) \
            -compose Modulate \
            -composite \
        \) \
        fd:0 \
        -compose Over \
        -composite 9999.png
)}

convert -list font | grep -isq "${font1_family}"
convert -list font | grep -isq "${font2_family}"

gen 駆逐 "DESTROYER"     0001.png &
gen 軽巡 "LIGHT CRUISER" 0002.png &
gen 重巡 "HEAVY CRUISER" 0003.png &
gen 戦艦 "BATTLESHIP"    0004.png &
gen 空母 "CARRIER"       0005.png &
wait

combine 0001.png 0002.png 0003.png 0004.png 0005.png