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cmbuckley/outer-glow.sh

Created February 21, 2019 16:59
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Add outer glow to images with transparent background
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outer-glow.sh
# Add 5px transparent border
convert file.png -bordercolor transparent -border 5 file-border.png
# Add a 3px blur based on the alpha channel
convert file-border.png \( +clone -background '#777777' -shadow 100x1+0+0 -channel A -level 0,100% -blur 0x3 \) -compose DstOver -gravity center -composite file-glow.png
# TODO combine the above
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