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   1  <?php
   2  /***********************************************************************

   3  ** Title.........:  NetPBM Driver

   4  ** Version.......:  1.0

   5  ** Author........:  Xiang Wei ZHUO <wei@zhuo.org>

   6  ** Filename......:  NetPBM.php

   7  ** Last changed..:  30 Aug 2003 

   8  ** Notes.........:  Orginal is from PEAR

   9  **/
  10  
  11  // +----------------------------------------------------------------------+

  12  // | PHP Version 4                                                        |

  13  // +----------------------------------------------------------------------+

  14  // | Copyright (c) 1997-2002 The PHP Group                                |

  15  // +----------------------------------------------------------------------+

  16  // | This source file is subject to version 2.02 of the PHP license,      |

  17  // | that is bundled with this package in the file LICENSE, and is        |

  18  // | available at through the world-wide-web at                           |

  19  // | http://www.php.net/license/2_02.txt.                                 |

  20  // | If you did not receive a copy of the PHP license and are unable to   |

  21  // | obtain it through the world-wide-web, please send a note to          |

  22  // | license@php.net so we can mail you a copy immediately.               |

  23  // +----------------------------------------------------------------------+

  24  // | Authors: Peter Bowyer <peter@mapledesign.co.uk>                      |

  25  // +----------------------------------------------------------------------+

  26  //

  27  // $Id$

  28  //

  29  // Image Transformation interface using command line NetPBM

  30  
  31  require_once  "Transform.php";
  32  
  33  Class Image_Transform_Driver_NetPBM extends Image_Transform
  34  {
  35  
  36      /**

  37       * associative array commands to be executed

  38       * @var array

  39       */
  40      var $command = array();
  41  
  42      /**

  43       * Class Constructor

  44       */
  45      function Image_Transform_Driver_NetPBM()
  46      {
  47          $this->uid = md5($_SERVER['REMOTE_ADDR']);
  48              
  49          return true;
  50      } // End function Image_NetPBM

  51  
  52      /**

  53       * Load image

  54       *

  55       * @param string filename

  56       *

  57       * @return mixed none or a PEAR error object on error

  58       * @see PEAR::isError()

  59       */
  60      function load($image)
  61      {
  62          //echo $image;

  63          $this->image = $image;
  64          $this->_get_image_details($image);
  65      } // End load

  66  
  67      /**

  68       * Resizes the image

  69       *

  70       * @return none

  71       * @see PEAR::isError()

  72       */
  73      function _resize($new_x, $new_y)
  74      {
  75          // there's no technical reason why resize can't be called multiple

  76          // times...it's just silly to do so

  77  
  78          $this->command[] = IMAGE_TRANSFORM_LIB_PATH .
  79                             "pnmscale -width $new_x -height $new_y";
  80  
  81          $this->_set_new_x($new_x);
  82          $this->_set_new_y($new_y);
  83      } // End resize

  84  
  85      /**

  86       * Crop the image

  87       *

  88       * @param int $crop_x left column of the image

  89       * @param int $crop_y top row of the image

  90       * @param int $crop_width new cropped image width

  91       * @param int $crop_height new cropped image height

  92       */
  93      function crop($crop_x, $crop_y, $crop_width, $crop_height) 
  94      {
  95          $this->command[] = IMAGE_TRANSFORM_LIB_PATH .
  96                              "pnmcut -left $crop_x -top $crop_y -width $crop_width -height $crop_height";
  97      }
  98  
  99      /**

 100       * Rotates the image

 101       *

 102       * @param int $angle The angle to rotate the image through

 103       */
 104      function rotate($angle)
 105      {
 106          $angle = -1*floatval($angle);
 107  
 108          if($angle > 90)
 109          {   
 110              $this->command[] = IMAGE_TRANSFORM_LIB_PATH . "pnmrotate -noantialias 90";
 111              $this->rotate(-1*($angle-90));
 112          }
 113          else if ($angle < -90)
 114          {
 115              $this->command[] = IMAGE_TRANSFORM_LIB_PATH . "pnmrotate -noantialias -90";
 116              $this->rotate(-1*($angle+90));
 117          }
 118          else
 119              $this->command[] = IMAGE_TRANSFORM_LIB_PATH . "pnmrotate -noantialias $angle";
 120      } // End rotate

 121  
 122      /**

 123       * Flip the image horizontally or vertically

 124       *

 125       * @param boolean $horizontal true if horizontal flip, vertical otherwise

 126       */
 127      function flip($horizontal) 
 128      {
 129          if($horizontal) 
 130              $this->command[] = IMAGE_TRANSFORM_LIB_PATH . "pnmflip -lr";
 131          else
 132              $this->command[] = IMAGE_TRANSFORM_LIB_PATH . "pnmflip -tb";
 133      }
 134  
 135      /**

 136       * Adjust the image gamma

 137       *

 138       * @param float $outputgamma

 139       *

 140       * @return none

 141       */
 142      function gamma($outputgamma = 1.0) {
 143          $this->command[13] = IMAGE_TRANSFORM_LIB_PATH . "pnmgamma $outputgamma";
 144      }
 145  
 146      /**

 147       * adds text to an image

 148       *

 149       * @param   array   options     Array contains options

 150       *             array(

 151       *                  'text'          // The string to draw

 152       *                  'x'             // Horizontal position

 153       *                  'y'             // Vertical Position

 154       *                  'Color'         // Font color

 155       *                  'font'          // Font to be used

 156       *                  'size'          // Size of the fonts in pixel

 157       *                  'resize_first'  // Tell if the image has to be resized

 158       *                                  // before drawing the text

 159       *                   )

 160       *

 161       * @return none

 162       */
 163      function addText($params)
 164      {
 165          $default_params = array('text' => 'This is Text',
 166                                  'x' => 10,
 167                                  'y' => 20,
 168                                  'color' => 'red',
 169                                  'font' => 'Arial.ttf',
 170                                  'size' => '12',
 171                                  'angle' => 0,
 172                                  'resize_first' => false);
 173          // we ignore 'resize_first' since the more logical approach would be

 174          // for the user to just call $this->_resize() _first_ ;)

 175          extract(array_merge($default_params, $params));
 176          $this->command[] = "ppmlabel -angle $angle -colour $color -size "
 177                             ."$size -x $x -y ".$y+$size." -text \"$text\"";
 178      } // End addText

 179  
 180      function _postProcess($type, $quality, $save_type)
 181      {
 182          $type = is_null($type) || $type==''? $this->type : $type;
 183          $save_type = is_null($save_type) || $save_type==''? $this->type : $save_type;
 184          //echo "TYPE:". $this->type;

 185          array_unshift($this->command, IMAGE_TRANSFORM_LIB_PATH
 186                        . $type.'topnm '. $this->image);
 187          $arg = '';
 188          switch(strtolower($save_type)){
 189              case 'gif':
 190                  $this->command[] = IMAGE_TRANSFORM_LIB_PATH . "ppmquant 256";
 191                  $this->command[] = IMAGE_TRANSFORM_LIB_PATH . "ppmto$save_type";
 192                  break;
 193              case 'jpg':
 194              case 'jpeg':
 195                  $arg = "--quality=$quality";
 196                  $this->command[] = IMAGE_TRANSFORM_LIB_PATH . "ppmto$save_type $arg";
 197                  break;
 198              default:
 199                  $this->command[] = IMAGE_TRANSFORM_LIB_PATH . "pnmto$save_type $arg";
 200                  break;
 201          } // switch

 202          return implode('|', $this->command);
 203      } 
 204  
 205      /**

 206       * Save the image file

 207       *

 208       * @param $filename string the name of the file to write to

 209       * @param string $type (jpeg,png...);

 210       * @param int $quality 75

 211       * @return none

 212       */
 213      function save($filename, $type=null, $quality = 85)
 214      {
 215          $cmd = $this->_postProcess('', $quality, $type) . ">$filename";
 216              
 217          //if we have windows server

 218          if(isset($_ENV['OS']) && eregi('window',$_ENV['OS']))
 219              $cmd = ereg_replace('/','\\',$cmd);
 220          //echo $cmd."##";

 221          $output = system($cmd);
 222          error_log('NETPBM: '.$cmd);
 223          //error_log($output);

 224          $this->command = array();
 225      } // End save

 226  
 227  
 228      /**

 229       * Display image without saving and lose changes

 230       *

 231       * @param string $type (jpeg,png...);

 232       * @param int $quality 75

 233       * @return none

 234       */
 235      function display($type = null, $quality = 75)
 236      {
 237          header('Content-type: image/' . $type);
 238          $cmd = $this->_postProcess($type, $quality);
 239          
 240          passthru($cmd);
 241          $this->command = array();
 242      }
 243  
 244      /**

 245       * Destroy image handle

 246       *

 247       * @return none

 248       */
 249      function free()
 250      {
 251          // there is no image handle here

 252          return true;
 253      }
 254  
 255  
 256  } // End class NetPBM

 257  ?>