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<?php
define('MIN_COL',50);
define('MAX_COL',254);
define('EXT','txt');
class AsciiImage
{
var $dir;
var $files;
var $image;
var $rgb;
var $step;
function AsciiImage($dir) {
$this->dir=$dir;
$this->rgb=$this->random_color();
}
function prepareImage() {
if(!is_dir($this->dir)) { $this->send404(); die(''); }
if ($handle = opendir($this->dir)) {
while (false !== ($file = readdir($handle))) {
if(is_file($this->dir.'/'.$file) AND ($this->getFileExtension($this->dir.'/'.$file) == '.'.EXT) AND $file != '.' AND $file != '..') {
$this->files[]=$file;
}
}
closedir($handle);
$this->image=$this->files[rand(0,sizeof($this->files)-1)];
}
}
function printImage() {
$lines = file($this->dir.'/'.$this->image);
$this->step=ceil(MAX_COL/sizeof($lines));
$step=$this->step;
echo "<font size=\"-2\"><table align=\"center\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\">\n";
$rgb=$this->rgb;
$lrgb=$rgb;
foreach ($lines as $line_num => $line) {
$hcol='';
foreach ($rgb as $i => $col) {
$lcol = $lrgb[$i];
$hcol .= sprintf("%02X", $col);
if($lcol>$col) {
$rgb[$i]-=$step;
} else
if($lcol<$col) {
$rgb[$i]+=$step;
} else
if($lcol==$col) { $rgb[$i]+=$step; }
if($rgb[$i]>MAX_COL) {
$rgb[$i]=MAX_COL-$step;
$lrgb[$i]=MAX_COL;
} else
if($rgb[$i]<MIN_COL) {
$rgb[$i]=MIN_COL+$step;
$lrgb[$i]=MIN_COL;
}
}
echo "\t<tr><td><span style=\"color: #".$hcol.";\">" . str_replace("\r","",str_replace("\n", "", htmlspecialchars($line))) . "</span></td></tr>\n";
}
echo "</table></font>";
}
function send404() {
header('Location: 404');
}
function getFileExtension($filename) {
return substr($filename, strrpos($filename, '.'));
}
function random_color() {
mt_srand((double)microtime()*1000000);
$c = '';
for ($i=0; $i<3; $i++) {
$rgb[]=mt_rand(MIN_COL, MAX_COL);
}
return $rgb;
}
}
?>
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