source: extensions/Ajax_Thumbnailer/ws_functions.inc.php @ 18928

<?php

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

$service = &$arr[0];
$service->addMethod('pwg.images.createThumbnail', 'ws_images_createThumbnail',
  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 ws_images_createThumbnail($params, $service)
{
  $picture = $params['picture'];
  $width = (integer)$params['width'];
  $height = (integer)$params['height'];
  $gd_version = (integer)$params['gd_version'];         
  $ext =$params['ext'];
  $square = (isset($params['square']) and $params['square'] == 'true' and function_exists('process_ratio'));
  return RatioResizeImg($picture,$width,$height,$ext,$gd_version,$square);
}

function RatioResizeImg($path, $newWidth, $newHeight, $tn_ext, $gd_version=2, $square=false)
{
  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 );

    $coord = $square ? process_ratio($srcWidth, $srcHeight) : array('x'=>0, 'y'=>0);

    $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, $coord['x'], $coord['y'],
        $destWidth,$destHeight,$srcWidth,$srcHeight );
    } else {
      // GD prior to version  2 -> pretty bad results :-/ (but fast)
      $destImage = imagecreate( $destWidth, $destHeight);
      imagecopyresized( $destImage, $srcImage, 0, 0, $coord['x'], $coord['y'],
        $destWidth,$destHeight,$srcWidth,$srcHeight );
    }

    $errors = array();
    if (($tndir = mkget_thumbnail_dir($dirname, $errors)) == false) {
      return new PwgError($errors[0]);
    }

    $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);
  }
}

?>