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root / to_tiles / gen_tiles.sh @ 0f3c4dcc

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#!/bin/bash
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test_mode=false
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memory_limit=256
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crop_x=256
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crop_y=256
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min_scale=0
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max_scale=8
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usage="$0 [-x <x_tile_size>] [-y <y_tile_size>] [-p <prefix_result>] [-t] [-h] [-m <min_zoom>] [-M <max_zoom>] <image_to_convert>\n   example: $0 -r test_res"
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if ! which tifftopnm pnmscale convert > /dev/null; then
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    echo "il faut installer les paquets netpbm et imageMagick pour utiliser ce script !"
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fi
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while getopts m:M:x:y:p:ht prs
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 do
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 case $prs in
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    t)        test_mode=true;;
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    x)        crop_x=$OPTARG;;
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    y)        crop_y=$OPTARG;;
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    m)        min_scale=$OPTARG;;
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    M)        max_scale=$OPTARG;;
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    p)        prefix=$OPTARG;;
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    \? | h)   echo -e $usage
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              exit 2;;
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 esac
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done
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shift `expr $OPTIND - 1`
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if [ -z "$1" ]; then
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    echo -e "usage :\n$usage"
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    exit 1
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elif [ ! -f "$1" ]; then
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    echo -e "le paramètre $1 ne correspond pas à un nom de fichier !"
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    exit 1
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fi
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fname=$1
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dir=$(dirname $fname)
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if [ -z "$prefix" ]; then
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    prefix=$(basename $1|sed 's/\..*$//')
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fi
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wfname=$prefix.pnm
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if ! $test_mode; then
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    tifftopnm $fname > $wfname
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else
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    echo "tifftopnm $fname > $wfname"
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fi
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echo "préfixe : "$prefix
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for ((z=$min_scale; z <= $max_scale; z++))
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do
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    fprefix=${prefix}_00$z
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    printf -v ratio %1.4lf $(echo "1 / (2^$z)" | bc -l)
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    echo génération du ratio $ratio
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    zwfname=tmp.pnm
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    if $test_mode; then
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	if [ $ratio = 1.0000 ]; then
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	    zwfname=$wfname
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	else
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	    echo "pnmscale $ratio $wfname > $zwfname"
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	fi
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	echo convert $zwfname \
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	    -limit memory $memory_limit \
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            -crop ${crop_x}x${crop_x} \
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            -set filename:tile "%[fx:page.x/${crop_x}]_%[fx:page.y/${crop_y}]" \
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            +repage +adjoin "${fprefix}_%[filename:tile].jpg"
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    else
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	if [ $ratio = 1.0000 ]; then
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	    zwfname=$wfname
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	else
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	    pnmscale $ratio $wfname > $zwfname
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	fi
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	convert $zwfname \
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	    -limit memory $memory_limit \
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            -crop ${crop_x}x${crop_x} \
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            -set filename:tile "%[fx:page.x/${crop_x}]_%[fx:page.y/${crop_y}]" \
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            +repage +adjoin "${fprefix}_%[filename:tile].jpg"
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    fi
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done
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echo  ${fprefix}_*
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if ! $test_mode; then
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## les lignes ci dessous sont destinnées à mettre des 0 en debut des numéros de ligne et de colonnes
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## Il y a certainement plus simple mais là c'est du rapide et efficace.
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    rename 's/_(\d\d)_(\d+\.jpg)$/_0$1_$2/' ${prefix}_*
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    rename 's/_(\d)_(\d+\.jpg)$/_00$1_$2/' ${prefix}_*
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    rename 's/_(\d+)_(\d\d)(\.jpg)$/_$1_0$2$3/' ${prefix}_*
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    rename 's/_(\d+)_(\d)(\.jpg)$/_$1_00$2$3/' ${prefix}_*
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    rm $zwfname $wfname
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else
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    echo rm $zwfname $wfname
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fi