<?

function getextension($n) {
 if(strstr($n,'?')) { $n=substr($n,0,strpos($n,'?')); }
 return strstr($n,'.') ? strtolower(trim(substr($n,strrpos($n,'.')+1))) : '';
}

function minmax( $n=0 ) { return min( 2048, max( 16, $n ) ); }

function oversized() { return imagecreatefrompng( 'fotos/oversized.png' ); }

$maxX = 2048;
$maxY = $maxX;
$saveas = ''; // empty, please
$defi = 'foto0.jpg';
$num = 120;
$defq = 60;

$uri = $_SERVER['REQUEST_URI'];
$ori = isset( $_GET['i'] ) ? $_GET['i'] : $defi;
$how = isset( $_GET['h'] ) ? $_GET['h'] : 'm';
$flip = isset( $_GET['f'] ) ? $_GET['f'] : '0';
$quality = min( 100, max( 10, intval( isset( $_GET['q'] ) ? $_GET['q'] : $defq ) ) );
$num = minmax( intval ( isset( $_GET['n'] ) ? $_GET['n'] : $num ) );

if( !is_file( $ori ) ) {
 foreach( array( 'gif', 'jpg', 'png' ) as $v ) { if( is_file( $ori . '.' . $v ) || is_file( 'crew/' . $ori . $v ) ) { $ori .= '.' . $v; break; } }
 if( is_file( 'crew/' . $ori ) ) { $ori = 'fotos/' . $ori; }
 if( !is_file( $ori ) ) { $ori = $defi; }
}

$ext = getextension( $ori );

$src = false;
if( !$src ) { $src = @imagecreatefromjpeg( $ori ); }
if( !$src ) { $src = @imagecreatefromgif( $ori ); }
if( !$src ) { $src = @imagecreatefrompng( $ori ); }
if( !$src ) { $src = @imagecreatefromwbmp( $ori ); }
if( !$src ) { $src = @imagecreatefromxbm( $ori ); }
if( !$src ) { $src = @imagecreatefromxpm( $ori ); }
if( !$src ) { $src = @imagecreatefromstring( $ori ); }
if( !$src ) { $src = oversized(); }
$oriX = imagesx( $src );
$oriY = imagesy( $src );
$num = $num ? $num : max( $oriX, $oriY );

if( $how=='w' ) {
 $maxX = minmax( $num );
} else if( $how=='h' ) {
 $maxY = minmax( $num );
} else {
 $a = minmax( $num );
 $maxX = $a;
 $maxY = $a;
}

$newX = $oriX/($oriY/$maxY);
$newY = $maxY;

if( $newX>$maxX ) {
 $newX = $maxX;
 $newY = $oriY/($oriX/$maxX);
}
$newX = round( $newX );
$newY = round( $newY );

if( $ext==='png' ) { $des = imagecreate( $newX, $newY ); }
 else { $des = imagecreatetruecolor( $newX, $newY ); }

if( true ) {
 imagecopyresampled( $des, $src, 0, 0, 0, 0, $newX, $newY, $oriX, $oriY );
}

if( !$des ) { $des = oversized(); }

if( !headers_sent() ) {
 header( 'HTTP/1.0 200' );
 header( 'Content-Type: image/' . str_replace( 'jpg', 'jpeg', $ext ) );
}
if( $ext==='png' ) { imagepng( $des ); }
 else if( $ext==='gif' ) { imagegif( $des ); }
 else { imagejpeg( $des, $saveas, $quality ); }
imagedestroy( $des );
imagedestroy( $src );
exit;
?>