/***************************************************************

 File: thumbnail.php

 Date/Time: 2008-01-02 21:02 24

 Author: (c) 2008 by Marko Schulz - <info@tuxnet24.de>

 Description: Little class to upload a file to a server.

/***************************************************************

 SYNOPSIS

 +++++ Create thumbnail from stream ( type => stream ) +++++

 // create database connection...

 (object) $dbh = mysql_connect( 'localhost', 'username', 'password' )

 	 or die( 'no mysql connection possible: '.mysql_error() );

 // select database...

 mysql_select_db( 'database', $dbh ) or die( 'no database selected'.mysql_error() );

 // send query to mysql...

 (object) $sth = mysql_query( "SELECT `data`, `mime` FROM `attachment` WHERE `id` =1" );

 // get mysql result as object...

 (object) $data = mysql_fetch_object( $sth );

 // close mysql connection...

 mysql_close( $dbh );

 // REQUIERED ARGS:  array( 'data' => $data, 'type' => 'stream', 'mime' => $mimetype )

 // OPTIONAL ARGS:   array( 'size' => $size )

 // print out the thumbnail...

 thumbnail ( array( 'data' => $data->data, 'type' => 'stream', 'mime' => $data->mime ) );

 +++++ Create thumbnail from file ( type => file ) +++++

 // path to image file (binary)...

 (string) $file = "pics/image.jpg";

 // REQUIERED ARGS:  array( 'data' => $data, 'mime' => $mimetype )

 // OPTIONAL ARGS:   array( 'type' => 'file', 'size' => $size )

 // print out the thumbnail...

 thumbnail ( array( 'data' => $file, 'mime' => 'image/jpeg' ) );

 +++++ Create thumbnail from file ( type => base64 ) +++++

 // path to image file (base64 encoded)...

 (string) $file = "pics/base64_image.txt";

 (string) $pics=implode( '',file( (string) $file ) ) or

 	die ( "Can't load -".$file."- as template file!" );

 // REQUIERED ARGS:  array( 'data' => $data, 'type' => 'base64', 'mime' => $mimetype )

 // OPTIONAL ARGS:   array( 'size' => $size )

 // print out the thumbnail...

 thumbnail ( array( 'data' => $pics, 'mime' => 'image/jpeg', 'type' => 'base64', 'size' => 200 ) );

/***************************************************************/

// This function create a thumbnail from image stream.

//

// thumbnail ( array( 'data' => (string) $data,

//					  'mime' => (string) $mimetype,

//					  'type' => (string) $type,

//					  [ 'size' => (integer) $size ] ) );

// 

function thumbnail ( $args = array() ) {

// requiered arguments...

if ( !$args['mime'] ) die( "No mime type defined!" );

if ( !$args['data'] ) die( "No data defined!" );

// default values...

if ( !$args['size'] ) $args['size'] = 100;

if ( !$args['type'] ) $args['type'] = 'file';

// create image...

if ( $args['type'] == 'file' ) {

	(string) $image = imagecreatefromstring( file_get_contents( $args['data'] ) );

} elseif ( $args['type'] == 'base64' ) {

	(string) $args['data'] = base64_decode( $args['data'] );

	(string) $image = imagecreatefromstring( $args['data'] );

} elseif ( $args['type'] == 'stream' ) {

	(string) $image = imagecreatefromstring( $args['data'] );

}

// get image size and calculate thumbnail size...

(integer) $width = $args['size'];

(integer) $height = $args['size'];

(integer) $iwidth =  imagesx( $image );

(integer) $iheight = imagesy( $image );

(integer) $ratio = $iwidth/$iheight;

if ( $width/$height > $ratio ) $width = $height*$ratio;

else $height = $width/$ratio;

// print out HTTP header...

header( "Content-type: ".$args['mime']."\n\n" );

// resample...

$img = imagecreatetruecolor( $width, $height );

imagecopyresampled( $img, $image, 0, 0, 0, 0, $width, $height, $iwidth, $iheight );

// output data...

if ( $args['mime'] = "image/jpeg" )

	imagejpeg( $img, null, 100 );

elseif ( $args['mime'] == "image/png" )

	imagepng( $img, null, 100 );

elseif ( $args['mime'] == "image/gif" )

	imagegif( $img, null, 100 );

// destroy image...

imagedestroy( $img );

}

//**************************************************************

// end of this function...

?>