104 lignes
3.1 KiB
Bash
Fichiers exécutables
104 lignes
3.1 KiB
Bash
Fichiers exécutables
#!/bin/sh
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# Copyright 2017 jstpcs <jstpcs at protonmail dot com>
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# Copyright 2017 moviuro <moviuro at gmail dot com>
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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set -e
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usage() {
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cat << EOH
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Generate wallpapers to a specified size, given a base picture
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$0 [-vs] width height [picture [picture [...]]]
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$0 -h
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-h : displays this help message
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-s : use a "safer" and slower method to get the background color
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-v : be verbose (set -x)
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Example: $0 1920 1080 coolimage.png
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The following syntax also works:
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find . -type f -name '*.png' | $0 1080 1920
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EOH
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exit ${1:-0}
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}
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die() {
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echo "$1" && exit "${2:-1}"
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}
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while getopts ":hvs" _opt; do
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case "$_opt" in
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h) usage ;;
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s) _slow=1 ;;
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v) set -x ;;
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*) usage 1 >&2 ;;
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esac
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done
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shift $((OPTIND-1))
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if [ -n "$_slow" ]; then
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getbg() {
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# We get all hexa codes of all pixels in the picture, and pick the most
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# frequent one... which should be the background color?
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convert "$1" -format %c +dither -depth 5 histogram:info: |
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sort -nr | head -1 | grep -Eo '#[A-F0-9]{6}'
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}
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else
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getbg() {
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# We get the color of the top-left pixel.
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convert "$1" -crop 1x1+0+0 -depth 8 txt: | grep -Eo '#[A-F0-9]{6}'
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}
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fi
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# We require width & height
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# TODO: maybe auto-detect? seems tricky with dual screen
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if [ $# -lt 2 ]; then
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usage 1 >&2
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fi
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width="$1"
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height="$2"
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shift 2
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{ if [ -z "$1" ]; then
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# No arguments, we read stdin
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cat -
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else
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for _file in "$@"; do
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printf '%s\n' "$_file"
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done
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fi } |
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while IFS= read -r inpfile; do
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outfile="$(basename "$inpfile")"
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bgcolor="$(getbg "$inpfile")"
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# We use the `-resize ..x..\>` syntax to only shrink pictures. Enlarging is
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# asking for trouble (artifacting, etc.)
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convert "$inpfile" -gravity center -resize "${width}x${height}>" \
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-background "$bgcolor" -extent "${width}x${height}" \
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"${outfile%.*}-${width}x${height}.${outfile##*.}"
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done
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