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intensifies Slack emoji creator
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| #!/bin/bash | |
| # Generate a `:something-intensifies:` Slack emoji, given a reasonable image | |
| # input. I recommend grabbing an emoji from https://emojipedia.org/ | |
| 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" | |
| # Clean up | |
| rm "$extended" "${frame}"-*.gif | |
| # We did it y'all | |
| echo "Created $gif. Enjoy!" |
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Requires
brew install ImageMagick