23 lines
440 B
Bash
23 lines
440 B
Bash
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#!/bin/sh -ex
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src=$1
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dest="result.png"
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font=$2
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header=$3
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footer=$4
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width=$(identify -format %w "${src}")
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caption_height=$((width/8))
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strokewidth=$((width/500))
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convert "${src}" \
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-background none \
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-font "${font}" \
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-fill white \
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-stroke black \
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-strokewidth ${strokewidth} \
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-size "${width}"x${caption_height} \
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-gravity north caption:"${header}" -composite \
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-gravity south caption:"${footer}" -composite \
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"${dest}"
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