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   1  <?php
   2  /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
   3  
   4  // +----------------------------------------------------------------------+
   5  // | Akelos Framework - http://www.akelos.org                             |
   6  // +----------------------------------------------------------------------+
   7  // | Copyright (c) 2002-2006, Akelos Media, S.L.  & Bermi Ferrer Martinez |
   8  // | Released under the GNU Lesser General Public License, see LICENSE.txt|
   9  // +----------------------------------------------------------------------+
  10  
  11  /**
  12   * @package ActiveSupport
  13   * @subpackage ImageManipulation
  14   * @author Bermi Ferrer <bermi a.t akelos c.om>
  15   * @copyright Copyright (c) 2002-2006, Akelos Media, S.L. http://www.akelos.org
  16   * @license GNU Lesser General Public License <http://www.gnu.org/copyleft/lesser.html>
  17   */
  18  
  19  /**
  20   * Resizing filter
  21   * 
  22   * Options are:
  23   * 'width
  24   * 'height'
  25   * 'mode' This setting will define how the image will be resized. Options are:
  26   *  - "normal" (default) will shrink to the largest side but will not grow the image if it is smaller
  27   *  - "expand" grows the image to the largest side
  28   *  - "force" forces the image to an specific size without maintaining the aspect ratio
  29   */
  30  class AkImageResizeFilter extends AkImageFilter
  31  {
  32      // Image->path
  33      // Image->filter_backup->path
  34      function setOptions($options = array())
  35      {
  36          $default_options = array(
  37          'width'=> $this->Image->getWidth(),
  38          'height'=> $this->Image->getHeight(),
  39          'scale_method' => 'smooth',
  40          'mode' => 'normal'
  41          );
  42  
  43          $this->_setWidthAndHeight_($options);
  44          $this->options = array_merge($default_options, $options);
  45          $this->_recalculateTargetDimenssions();
  46          $this->_variablizeOptions_($options);
  47      }
  48  
  49      function apply()
  50      {
  51          $this->Image->Transform->resize($this->options['width'], $this->options['height'], $this->options);
  52      }
  53  
  54      function getName()
  55      {
  56          return 'resize';
  57      }
  58  
  59      function _setWidthAndHeight_(&$options)
  60      {
  61          if(!empty($options['size'])){
  62              list($options['width'], $options['height']) = split('x|X| ',trim(str_replace(' ','',$options['size'])).'x');
  63              unset($options['size']);
  64          }
  65  
  66          if(strstr($options['width'],'%')){
  67              $options['width'] = $this->_getProportionalWidth($options['width']);
  68          }
  69          if(strstr($options['height'],'%')){
  70              $options['height'] = $this->_getProportionalHeight($options['height']);
  71          }
  72      }
  73  
  74      function _recalculateTargetDimenssions()
  75      {
  76          $original_width = $this->Image->getWidth();
  77          $original_height = $this->Image->getHeight();
  78  
  79          $target_width = empty($this->options['width']) ? $original_width : $this->options['width'];
  80          $target_height = empty($this->options['height']) ? $original_height : $this->options['height'];
  81  
  82          if($this->options['mode'] == 'normal' && $original_width < $target_width && $original_height < $target_height) {
  83  
  84              $this->options['width'] = $original_width;
  85              $this->options['height'] = $original_height;
  86              return true;
  87          }
  88  
  89          if ($this->options['mode'] != 'force') {
  90  
  91              $original_aspect_ratio = $original_height / $original_width;
  92              $target_aspect_ratio = $target_height / $target_width;
  93  
  94              if ($this->options['mode'] != 'expand') {
  95                  if ($original_aspect_ratio > $target_aspect_ratio) {
  96                      $target_width = $original_width / $original_height * $target_height;
  97                  } else {
  98                      $target_height = $original_height / $original_width * $target_width;
  99                  }
 100              } else {
 101                  if ($original_aspect_ratio > $target_aspect_ratio) {
 102                      $target_height = $original_height / $original_width * $target_width;
 103                  } else {
 104                      $target_width = $original_width / $original_height * $target_height;
 105                  }
 106              }
 107          }
 108  
 109          $this->options['width'] = $target_width;
 110          $this->options['height'] = $target_height;
 111      }
 112  
 113      function _getProportionalWidth($proportion = '100%')
 114      {
 115          return intval($proportion)/100*$this->Image->getWidth();
 116      }
 117  
 118      function _getProportionalHeight($proportion = '100%')
 119      {
 120          return intval($proportion)/100*$this->Image->getHeight();
 121      }
 122  }
 123  
 124  ?>