Zabbix

#!/bin/bash

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# A script to convert SVG into multiple sizes of PNG and compress them with pngcrush

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# todo :

# figure out how to auto-scale rack images

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# depends on inkscape, pngcrush, awk

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pngcrushbin=pngcrush

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outputdir="${1:-png_modern}"

sourcedir="svg"

elementdir="$sourcedir/elements"

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pngcrushlog=pngcrush.log.txt

pngcrushoutput=pngcrushoutput.txt

inkscapelog=inkscape.log.txt

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crushpng() {

    $pngcrushbin -brute -reduce -e .2.png "$1" >> "$pngcrushoutput" || exit 1

    echo "$1 : $(echo "$(stat -c %s "${1%png}2.png")/$(stat -c %s "${1}")*100" | bc -l)" >> "$pngcrushlog"

    mv "${1%png}2.png" "$1"

}

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svgtopng() {

    # parameters : svg, size, reported size, dimension

    # 3rd parameter allows to override "reported" size; if missing, actual size is used

    # 4th parameter allows to override width/height detection

    pngoutfile="$outputdir/$(basename ${1%.svg})_(${3:-$2}).png"

    [[ "$(stat -c "%Y" "$pngoutfile" 2>/dev/null)" -lt "$svgfilemod" ]] && {

        # if png file modification time is older than svg file modification time

        echo -n " to $2..."

        # we have to query image dimensions first, because export dimensions are used "as-is", resulting in a square rackmountable server, for example

        # inkscape option --query-all could be used, but it's not fully clear which layer is supposed to be "whole image"

        # crudely dropping decimal part, bash fails on it

        [[ "$4" ]] && {

            dimension=$4

        } || {

            [[ "$(inkscape --without-gui --query-width $1 | cut -d. -f1)" -gt "$(inkscape --without-gui --query-height $1 | cut -d. -f1)" ]] && {

                dimension=width

            } || {

                dimension=height

            }

        }

        inkscape --without-gui --export-$dimension=$2 $1 --export-png="$pngoutfile" >> "$inkscapelog" || exit 1

        echo -n " compress..."

        crushpng "$pngoutfile"

    } || {

        echo -n " skip $2..."

    }

}

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mkdir -p "$outputdir"

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> "$pngcrushoutput"

> "$pngcrushlog"

> "$inkscapelog"

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svgelementcount=$(ls $elementdir | wc -l)

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for svgfile in $elementdir/*.svg; do

    echo -n "Converting $svgfile"

    ((elementfilesdone++))

    svgfilemod=$(stat -c "%Y" "$svgfile")

    for size in 24 48 64 96 128; do

        # rackmountable device icons don't make much sense below size 64

        [[ "$svgfile" =~ Rackmountable_.* || "$svgfile" =~ Zabbix_server_.* || "$svgfile" =~ UPS_rackmountable.* ]] && [ "$size" -lt "64" ] && continue

        svgtopng "$svgfile" "$size"

    done

    echo "[$[$elementfilesdone*100/$svgelementcount]%]"

done

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# rack images for now are converted with a fixed ratio

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rackimages=([64]=68 [96]=101 [128]=134)

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echo -n "Converting Rack_42.svg"

for rackimagesize in "${!rackimages[@]}"; do

    svgtopng "$sourcedir/equipment_rack/Rack_42.svg" "${rackimages[$rackimagesize]}" "$rackimagesize" "width"

done

echo

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rackwithdoorimages=([64]=100 [96]=149 [128]=199)

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echo -n "Converting Rack_42_with_door.svg"

for rackwithdoorimagesize in "${!rackwithdoorimages[@]}"; do

    svgtopng "$sourcedir/equipment_rack/Rack_42_with_door.svg" "${rackwithdoorimages[$rackwithdoorimagesize]}" "$rackwithdoorimagesize" "width"

done

echo

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