104 lines
2.4 KiB
Bash
104 lines
2.4 KiB
Bash
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#!/bin/sh
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# gifcap: Make an iFunny gif caption
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# Copyright (C) 2024 Sasha Koshka (pseudonymous)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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name="$0"
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font="Futura PT Cond Extra Bold.otf"
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input=""
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output=""
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caption=""
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usage () {
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echo "Usage: $name [OPTION]... CAPTION..."
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echo "Make an iFunny gif caption."
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echo ""
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echo " -f, --font specify a font to use (default: ifunny.otf)"
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echo " -i, --input the input file (required)"
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echo " -o, --output the output file (default: input)"
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echo " --help display this help and exit"
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}
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while test $# -gt 0; do
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case $1 in
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-f|--font)
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font="$2"
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shift; shift
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;;
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-i|--input)
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input="$2"
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shift; shift
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;;
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-o|--output)
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output="$2"
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shift; shift
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;;
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--help)
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usage
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exit 0
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;;
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-*|--*)
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usage
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exit 2
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;;
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*)
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if test -z "$caption";
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then caption="$1"
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else caption="$caption $1"
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fi
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shift
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;;
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esac
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done
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if test -z "$input"; then
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usage
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exit 2
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fi
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if test -z "$output"; then
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output="captioned-`basename "$input"`"
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fi
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if ! test -f "$input"; then
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echo "$name: $input not found"
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exit 1
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fi
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captionWidth="512x"
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captionTemp=`mktemp --suffix=".png"`
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imageWidth=`convert "$input" -format "%[w]x" info:`
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echo "$name: generating caption..."
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convert \
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-background white -fill "#010000" -font "$font" \
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-pointsize 55 -size "$captionWidth" -gravity Center \
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caption:"$caption" \
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-bordercolor white -border 20x20 \
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"$captionTemp"
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echo "$name: compositing over $input..."
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# https://www.imagemagick.org/discourse-server/viewtopic.php?t=33797
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convert \
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"$captionTemp" -resize "$imageWidth" \
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-background white \( "$input" -coalesce \) \
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-set page "%[fx:u.w]x%[fx:u.h+v.h]+%[fx:t?(u.w-v.w)/2:0]+%[fx:t?u.h:0]" -coalesce \
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null: -insert 1 -layers composite -layers optimize \
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"$output"
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rm "$captionTemp"
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echo "$name: done!"
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