Created
May 8, 2020 21:48
-
-
Save linuswillner/894abf07d808e4d70b404d91a86a8fca to your computer and use it in GitHub Desktop.
Vibrating Discord emoji generator
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/bin/bash | |
# Generate a vibrating Discord emoji from a PNG file | |
set -euo pipefail | |
# Number of frames of shaking | |
count=10 | |
# Max pixels to move while shaking | |
delta=4 | |
if [ $# -eq 0 ]; then | |
echo "Usage: $0 input.png" | |
exit 1 | |
fi | |
input=$1 | |
cd "$(dirname "$input")" | |
filename=$(basename -- "$input") | |
# Add 10% padding to width and height, then scale to 128x128 | |
width=$(identify -format "%w" "$filename") | |
height=$(identify -format "%h" "$filename") | |
new_width=$(( width + width / 10 )) | |
new_height=$(( height + height / 10 )) | |
extended="${filename%.*}-extended.png" | |
convert \ | |
-gravity center \ | |
-background none \ | |
-extent ${new_width}x${new_height} \ | |
-geometry 128x128 \ | |
"$filename" \ | |
"$extended" | |
# Generate some shaky frames | |
frame="${filename%.*}-frame" | |
n=0 | |
while [ "$n" -lt "$count" ]; do | |
# Generate some random shake | |
x=$((RANDOM % (delta * 2) - delta)) | |
y=$((RANDOM % (delta * 2) - delta)) | |
# Ensure coordinates are of the form +3 or -4 | |
[ "$x" -ge 0 ] && x="+$x" | |
[ "$y" -ge 0 ] && y="+$y" | |
# Shake the image | |
convert "$extended" -page "${x}${y}" -background none -flatten "$frame"-"$n".gif | |
n=$((n + 1)) | |
done | |
# Combine the frames into a GIF | |
gif="${filename%.*}-intensifies.gif" | |
convert -background none -dispose Background -delay 1x30 -loop 0 "${frame}"-*.gif "$gif" | |
# Cleanup | |
rm "$extended" "${frame}"-*.gif | |
echo "Created $gif." |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment