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checkboard maker powered by ImageMagick
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#! /bin/bash | |
set -euo pipefail | |
# ImageMagick7 を使う時は convert を magick に書き換えた方が良いです。 | |
IM_CONVERT=convert | |
if [ $# -ne 7 ];then | |
echo "Usage: im_checkboard.sh <width> <height> <unitx> <unity> <color1> <color2> <outputfile>" | |
echo "ex) im_checkboard.sh 100 100 50 70 red green output.png | |
exit 1 | |
fi | |
width=$1 ; height=$2 ; unitx=$3 ; unity=$4 ; | |
color1=$5 ; color2=$6 ; | |
outputfile=$7 | |
ux=`expr $unitx \* 100` | |
uy=`expr $unity \* 100` | |
# pattern:checkerboard のマス目サイズは 15x15 を 2x2 の組にした 30x30 | |
# 16x16 を作って右下 2x2 で最小単位のマス目を作る事にする | |
$IM_CONVERT -size 16x16 pattern:checkerboard \ | |
-gravity southeast -crop 2x2+0+0\! \ | |
-auto-level -colorspace sRGB \ | |
-fill $color1 -opaque white -fill $color2 -opaque black \ | |
-sample ${ux}x${uy}% -write mpr:CELL \ | |
-size ${width}x${height} tile:mpr:CELL -delete 0 \ | |
$outputfile | |
exit 0 |
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