source: extensions/Ajax_Thumbnailer/main.inc.php @ 5732

<?php
/*
Plugin Name: Ajax Thumbnailer
Version: 0.3
Description: gestion de miniatures en masse / mass thumbnail generator
Plugin URI: http://piwigo.org/ext/extension_view.php?eid=327
Author: Bruno Hondelatte
Author URI: http://morefnu.org
*/

ini_set('error_reporting', E_ALL);
ini_set('display_errors', true);

if (!defined('PHPWG_ROOT_PATH')) die('Hacking attempt!');

class AjaxThumbnailer
{
        /* This function is almost the same as the ont in admin/thumbnail.php , tuned
                for web-service purposes */
        function RatioResizeImg($path, $newWidth, $newHeight, $tn_ext,$gd_version=2) {
                global $conf, $lang, $page;
                
                $starttime = get_moment();

                if (!function_exists('gd_info'))
                        return new PwgError(WS_ERR_INVALID_PARAM,  'no gd');

                if (!file_exists($path))
                        return new PwgError(WS_ERR_INVALID_PARAM,  'file not found');

                $filename = basename($path);
                $dirname = dirname($path);

                // extension of the picture filename
                $extension = get_extension($filename);

                if (in_array($extension, array('jpg', 'JPG', 'jpeg', 'JPEG'))) {
                        $srcImage = @imagecreatefromjpeg($path);
                }
                elseif ($extension == 'png' or $extension == 'PNG') {
                        $srcImage = @imagecreatefrompng($path);
                } else {
                        unset($extension);
                }

                if ( isset( $srcImage ) ) {
                        // width/height
                        $srcWidth    = imagesx( $srcImage ); 
                        $srcHeight   = imagesy( $srcImage ); 
                        $ratioWidth  = $srcWidth/$newWidth;
                        $ratioHeight = $srcHeight/$newHeight;

                        // maximal size exceeded ?
                        if ( ( $ratioWidth > 1 ) or ( $ratioHeight > 1 ) ) {
                                if ( $ratioWidth < $ratioHeight) { 
                                        $destWidth = $srcWidth/$ratioHeight;
                                        $destHeight = $newHeight; 
                                } else { 
                                        $destWidth = $newWidth; 
                                        $destHeight = $srcHeight/$ratioWidth;
                                }
                        } else {
                                $destWidth = $srcWidth;
                                $destHeight = $srcHeight;
                        }
                        // according to the GD version installed on the server
                        if ( $gd_version == 2 ) {
                                // GD 2.0 or more recent -> good results (but slower)
                                $destImage = imagecreatetruecolor( $destWidth, $destHeight); 
                                imagecopyresampled( $destImage, $srcImage, 0, 0, 0, 0,
                                        $destWidth,$destHeight,$srcWidth,$srcHeight );
                        } else {
                                // GD prior to version  2 -> pretty bad results :-/ (but fast)
                                $destImage = imagecreate( $destWidth, $destHeight);
                                imagecopyresized( $destImage, $srcImage, 0, 0, 0, 0,
                                        $destWidth,$destHeight,$srcWidth,$srcHeight );
                        }

                        if (($tndir = mkget_thumbnail_dir($dirname)) == false) {
                                return new PwgError(WS_ERR_INVALID_PARAM,  '['.$tndir.'] : '.l10n('no_write_access'));
                        }

                        $dest_file = $tndir.'/'.$conf['prefix_thumbnail'];
                        $dest_file.= get_filename_wo_extension($filename);
                        $dest_file.= '.'.$tn_ext;

                        // creation and backup of final picture
                        if (!is_writable($tndir))
                                return new PwgError(WS_ERR_INVALID_PARAM,  '['.$tndir.'] : '.l10n('no_write_access'));
                                
                        imagejpeg($destImage, $dest_file, $conf['tn_compression_level']);
                        // freeing memory ressources
                        imagedestroy( $srcImage );
                        imagedestroy( $destImage );

                        list($tn_width, $tn_height) = getimagesize($dest_file);
                        $tn_size = floor(filesize($dest_file) / 1024).' KB';

                        $endtime = get_moment();
                        
                        $info = array( 'path'      => $path,
                        'tn_file'   => $dest_file,
                        'tn_width'  => $tn_width,
                        'tn_height' => $tn_height,
                        'tn_size'   => $tn_size,
                        'tn_time'       => number_format(($endtime - $starttime) * 1000, 2, '.', ' ').' ms');
                        return $info;
                } else {
                        // error
                        $err=l10n('tn_no_support');
                        if ( isset( $extension ) )
                                $err .= l10n('tn_format').' '.$extension;
                        else
                                $err .= l10n('tn_thisformat');
                        return new PwgError(WS_ERR_INVALID_PARAM, $err);
                }
        }

        function plugin_admin_menu($menu) {
        array_push($menu,
            array(
                'NAME' => 'Ajax Thumbnailer',
                'URL' => get_admin_plugin_menu_link(dirname(__FILE__).'/admin/thumbnailer_admin.php')
            )
        );
        return $menu;
    }

        function ws_methods($arr) {
                $service = &$arr[0];
                $service->addMethod('pwg.thumbnail.create', array($this,'create_thumb'),
                  array(
                        'picture'=>array(),
                        'width'=>array('default'=>"128"),
                        'height'=>array('default'=>"128"),
                        'ext'=>array('default'=>"jpg")
                  ),
                  'Creates a thumbnail for a given image,
                <br><b>picture</b> is the name of the picture to create thumbnail from.'
                );
                
        }
        
        function create_thumb($params, $service) {
                $picture = $params['picture'];
                $width = (integer)$params['width'];
                $height = (integer)$params['height'];
                $gd_version = (integer)$params['gd_version'];           
                $ext =$params['ext'];
                return $this->RatioResizeImg($picture,$width,$height,$ext,$gd_version);
        }
        
}
$obj = new AjaxThumbnailer();

add_event_handler('ws_add_methods', array(&$obj, 'ws_methods'));
add_event_handler('get_admin_plugin_menu_links', array(&$obj, 'plugin_admin_menu') );
set_plugin_data($plugin['id'], $obj);

?>