250 lines
7.2 KiB
Bash
250 lines
7.2 KiB
Bash
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#!/bin/sh
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printf '%s' \
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'/*!
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* mkpicindex.sh - v0.1
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* https://codevoid.de
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* Copyright (c) 2019 Stefan Hagen
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* Licensed under the ISC license.
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*/
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' > LICENSE
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# DEPENDENCIES
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# - ImageMagic (identify, convert)
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# - raw only: jhead
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# - raw only: dcraw
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# LIMITATIONS
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# - leftover images on the last row won't be added
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# - the thumbnail cache is not cleaned automaticall
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# CONFIGURE
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TITLE="My Gallery" # browser title
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WIDTH=1000 # how wide will the gallery be
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ROW_HEIGHT=180 # how high will the justified rows be?
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THUMB_QUALITY=83 # quality for thumbnails
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THUMB_PATH="thm" # relative path to thumbnail folder
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THUMB_PADDING="6" # image padding
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# TECHNICAL STUFF
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DEBUG=0 # debug output
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PROCS=8
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# PRINT HELP / USAGE TEXT
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usage() {
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printf '%s\n' \
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'mkpicindex - Version: $Id$
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Usage: mkpicindex [arguments] > file.html
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Arguments:
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-t "My Gallery" Gallery title
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-w 850 Gallery main area width
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-h 180 Row height (thumbnail size)
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-q 83 Thumbnail quality
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-b 6 Thumbnail border (padding)
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-p 8 Max. parallel conversion processes
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-d Enable debug mode (verbose output)
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-h Usage (this text)
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'
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exit 2
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}
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# OVERIDE DEFAULTS
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while getopts 't:w:h:b:q:p:d' c
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do
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case $c in
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t) TITLE="$OPTARG" ;;
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w) WIDTH="$OPTARG" ;;
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h) ROW_HEIGHT="$OPTARG" ;;
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q) QUALITY="$OPTARG" ;;
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b) THUMB_PADDING="$OPTARG" ;;
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p) PROCS="$OPTARG" ;;
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d) DEBUG=1 ;;
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?|*) usage; ;;
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esac
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done
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# PRINT USAGE IF OUTPUT IS NOT REDIRECTED
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[ "$DEBUG" != 1 ] && test -t 1 && usage;
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# GLOBAL TMP VARIABLES
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G_ROW_WIDTH=0 # combined pic width < WIDTH @ ROW_HEIGHT
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G_ROW_FILES="" # pipe separated files < WIDTH
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MORE=1 # trigger next loop
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# CREATE THUMBNAIL DIRECTORY
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mkdir -p "$THUMB_PATH"
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# OUTPUT HELPER
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debug() { [ "$DEBUG" == "1" ] && printf '%s\n' "Debug: $1" >&2; }
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console() { printf '%s\n' "$1" >&2; }
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# CALCULATE BY ASPECT RATIO
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get_width_by_height() {
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# returns aspect ratio calculated width
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local F="$1" # image file
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local TH="$2" # target height
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local R="$(identify -format ' %w %h ' "$1" | awk -vTH=$TH \
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'{ printf("%.0f", TH*($1/$2)) }')"
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printf '%.0f' "$R"
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debug "get_width_by_height: FILE=$F TARGET_HEIGHT=$TH RET_WIDTH=$R"
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}
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# TOO MANY CONVERT PROCSSES => WAIT
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thread_check() {
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while [ $(pgrep convert | wc -l | awk '{ print $1 }') -gt $(($PROCS-1)) ];
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do debug "Process Limit ($PROCS) reached. Waiting..."; sleep 2; done
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}
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# EXTACT CAMERA IMAGE FROM RAW
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convert_raw() {
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# XXX dcraw may export a PPM file.
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F="$1" # raw image
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if ! [ -f "${F%%.*}_preview.jpg" ]; then
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dcraw -e -c "$F" > "${F%%.*}_preview.jpg"
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jhead -q -autorot "${F%%.*}_preview.jpg"
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console "Raw Conversion: ${F%%.*}_preview.jpg"
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fi
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}
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# CREATE THUMBNAIL
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create_thumb() {
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local F="$1" # original
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local W="$2" # width
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local H="$3" # height
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local T="${F%%.*}-$H"
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if [ -f "$THUMB_PATH/$T.gif" ];
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then printf '%s' "$THUMB_PATH/$T.gif"
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elif [ -f "$THUMB_PATH/$T.jpeg" ];
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then printf '%s' "$THUMB_PATH/$T.jpeg"
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else
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thread_check
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case $(printf '%s' "${F##*.}" | tr '[:upper:]' '[:lower:]') in
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gif) console "Creating Thumbnail: $THUMB_PATH/$T.gif"
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nohup convert -quality $THUMB_QUALITY -sharpen 2x2 \
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-coalesce -resize 6000x$H\> \
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-deconstruct "$F" \
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"$THUMB_PATH/$T.gif" >/dev/null 2>&1 &
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printf '%s' "$THUMB_PATH/$T.gif" ;;
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*) console "Creating Thumbnail: $THUMB_PATH/$T.jpeg"
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nohup convert -quality $THUMB_QUALITY -sharpen 2x2 \
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-auto-orient -resize 6000x$H\> "$F" \
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"$THUMB_PATH/$T.jpeg" >/dev/null 2>&1 &
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printf '%s' "$THUMB_PATH/$T.jpeg" ;;
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esac
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fi
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}
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# ADD IMAGE LOOP
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add_image() {
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local F="$1" # image file
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# How wide would the image be when we rescale it to $ROW_HEIGHT?
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local NW=$(get_width_by_height "$F" "$ROW_HEIGHT")
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debug "add_image: FILE=$F NW=${NW}x$ROW_HEIGHT"
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# We add images and their width to $G_ROW_WIDTH until $WIDTH will
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# be exceeded.
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if [ "$(( $G_ROW_WIDTH + $NW ))" -gt "$WIDTH" ]; then
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debug "add_image: max width reached with F=$F @ $G_ROW_WIDTH"
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# we're building a row now
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printf " <div class=\"row\">\n";
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# calculate how much we need to stretch images to fill the
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# whole row.
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local RFH=$(printf "$G_ROW_WIDTH $WIDTH $ROW_HEIGHT" \
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| awk '{ printf("%.0f",$3*($2/$1)) }')
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debug "RFH=$RFH"
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# loop through the images in this row and recalculate
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# them with their new, real height.
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local IFS='|'; for RF in $G_ROW_FILES;
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do
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local RFW=$(($(get_width_by_height "$RF" "$RFH") - 2*$THUMB_PADDING))
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debug "add_image: adding file: F=$RF with W=$RFW H=$RFH"
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local T=$(create_thumb "$RF" "$RFW" "$RFH")
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debug "add_image: created thumbnail $T"
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# output HTML for image
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console "Adding Image: $RF"
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printf ' <div class="image">\n'
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printf ' <a href="'$RF'">\n'
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printf ' <img width="'$RFW'" height="'$RFH'" src="'$T'">\n'
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printf ' </a>\n'
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printf ' </div>\n'
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done
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# we're done with this row now.
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printf " </div>\n";
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# set leftover file as for next iteration
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G_ROW_WIDTH="$NW"
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G_ROW_FILES="$F|"
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else
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# add more items...
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debug "add_image: width has not been reached, continue loop."
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G_ROW_WIDTH="$(( $G_ROW_WIDTH + $NW ))"
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G_ROW_FILES="$F|$G_ROW_FILES"
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fi
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}
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# HEADER
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printf '%s\n' \
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'<html>
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<head>
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<meta name="viewport" content="width=device-width">
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<title>'"$TITLE"'</title>
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<style>
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html {
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background: black;
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color: orange;
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}
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.base {
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margin-left: auto;
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margin-right: auto;
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width: min-content;
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}
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.row {
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display: block;
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float: clear;
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width: max-content;
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margin-left: auto;
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margin-right: auto;
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white-space: nowrap;
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}
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.image {
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float: left;
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width: fit-content;
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height: fit-content;
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padding: '"$THUMB_PADDING"';
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}
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</style>
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</head>
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<body>
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<div class="base">
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'
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### MAIN LOOP ##########################################################
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for F in *.*;
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do
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if [ -f "$F" ];
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then
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case "$(printf '%s' ${F##*.} | tr '[:upper:]' '[:lower:]')" in
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jpg|jpeg|png|gif|svg) add_image "$F" ;;
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cr2|dng|nef|CR2) convert_raw "$F" && \
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add_image "${F%%.*}_preview.jpg" ;;
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*) console "Ignoring: $F" ;;
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esac
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fi
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done
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### MAIN LOOP END ######################################################
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# FOOTER
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printf '%s\n' \
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' </div>
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</body>
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</html>'
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