#!/usr/bin/perl -wT

use strict;
use Image::Magick;
use CGI qw(:standard escapeHTML);
use CGI::Carp qw(fatalsToBrowser);

# Declares defaults
my ( $dir,$file,$img) =
  ('/home/renelacroute/imagepublic',"","");

my $q = new CGI;
my $r = param("r");
my $hauteur = param("hauteur");
my $largueur = param("largeur");
$file = random_file ($dir, '\\.(png|PNG||jpg|JPG|jpeg|JPEG|gif)$' );

print $q->header( -type => "image/png", -expires => "-1d" );
binmode STDOUT;

$img = &shrink($file,$hauteur,$largueur);


sub random_file {
    my( $dir,$mask ) = @_;
    my $i = 0;
    my ($file);
    local( *DIR);
    
    opendir DIR, $dir or die "Cannot open $dir: $!";
    while ( defined ( $_ = readdir DIR ) ) {
        /$mask/o or next if defined $mask;
        rand ++$i < 1 and $file = $_;
    }
    closedir DIR;
    return "$dir/$file";
}

# Load the given image ans shrinks it to be within the given size
# or percentage 
sub shrink () {
    my($name,$hauteur,$largueur) = @_;
    my($img) = new Image::Magick;
    print "i got to $name!\n";
##    print $size;
    my $x = $img->Read($name);
    warn "$x" if $x;
    my $y = $img->Resize('width' => $hauteur , 'height' => $largueur );
    warn "$y" if $y;
    my $z = $img->Write('png:-');
    warn "$z" if $z;
    undef $img;
    }