libraries/Image_lib.php

   1 <?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
   2 /**
   3  * CodeIgniter
   4  *
   5  * An open source application development framework for PHP 4.3.2 or newer
   6  *
   7  * @package             CodeIgniter
   8  * @author              ExpressionEngine Dev Team
   9  * @copyright   Copyright (c) 2008 - 2009, EllisLab, Inc.
  10  * @license             http://codeigniter.com/user_guide/license.html
  11  * @link                http://codeigniter.com
  12  * @since               Version 1.0
  13  * @filesource
  14  */
  15
  16 // ------------------------------------------------------------------------
  17
  18 /**
  19  * Image Manipulation class
  20  *
  21  * @package             CodeIgniter
  22  * @subpackage  Libraries
  23  * @category    Image_lib
  24  * @author              ExpressionEngine Dev Team
  25  * @link                http://codeigniter.com/user_guide/libraries/image_lib.html
  26  */
  27 class CI_Image_lib {
  28
  29         var $image_library              = 'gd2';        // Can be:  imagemagick, netpbm, gd, gd2
  30         var $library_path               = '';
  31         var $dynamic_output             = FALSE;        // Whether to send to browser or write to disk
  32         var $source_image               = '';
  33         var $new_image                  = '';
  34         var $width                              = '';
  35         var $height                             = '';
  36         var $quality                    = '90';
  37         var $create_thumb               = FALSE;
  38         var $thumb_marker               = '_thumb';
  39         var $maintain_ratio             = TRUE;         // Whether to maintain aspect ratio when resizing or use hard values
  40         var $master_dim                 = 'auto';       // auto, height, or width.  Determines what to use as the master dimension
  41         var $rotation_angle             = '';
  42         var $x_axis                             = '';
  43         var     $y_axis                         = '';
  44
  45         // Watermark Vars
  46         var $wm_text                    = '';                   // Watermark text if graphic is not used
  47         var $wm_type                    = 'text';               // Type of watermarking.  Options:  text/overlay
  48         var $wm_x_transp                = 4;
  49         var $wm_y_transp                = 4;
  50         var $wm_overlay_path    = '';                   // Watermark image path
  51         var $wm_font_path               = '';                   // TT font
  52         var $wm_font_size               = 17;                   // Font size (different versions of GD will either use points or pixels)
  53         var $wm_vrt_alignment   = 'B';                  // Vertical alignment:   T M B
  54         var $wm_hor_alignment   = 'C';                  // Horizontal alignment: L R C
  55         var $wm_padding                 = 0;                    // Padding around text
  56         var $wm_hor_offset              = 0;                    // Lets you push text to the right
  57         var $wm_vrt_offset              = 0;                     // Lets you push  text down
  58         var $wm_font_color              = '#ffffff';    // Text color
  59         var $wm_shadow_color    = '';                   // Dropshadow color
  60         var $wm_shadow_distance = 2;                    // Dropshadow distance
  61         var $wm_opacity                 = 50;                   // Image opacity: 1 - 100  Only works with image
  62
  63         // Private Vars
  64         var $source_folder              = '';
  65         var $dest_folder                = '';
  66         var $mime_type                  = '';
  67         var $orig_width                 = '';
  68         var $orig_height                = '';
  69         var $image_type                 = '';
  70         var $size_str                   = '';
  71         var $full_src_path              = '';
  72         var $full_dst_path              = '';
  73         var $create_fnc                 = 'imagecreatetruecolor';
  74         var $copy_fnc                   = 'imagecopyresampled';
  75         var $error_msg                  = array();
  76         var $wm_use_drop_shadow = FALSE;
  77         var $wm_use_truetype    = FALSE;
  78
  79         /**
  80          * Constructor
  81          *
  82          * @access      public
  83          * @param       string
  84          * @return      void
  85          */
  86         function CI_Image_lib($props = array())
  87         {
  88                 if (count($props) > 0)
  89                 {
  90                         $this->initialize($props);
  91                 }
  92
  93                 log_message('debug', "Image Lib Class Initialized");
  94         }
  95
  96         // --------------------------------------------------------------------
  97
  98         /**
  99          * Initialize image properties
 100          *
 101          * Resets values in case this class is used in a loop
 102          *
 103          * @access      public
 104          * @return      void
 105          */
 106         function clear()
 107         {
 108                 $props = array('source_folder', 'dest_folder', 'source_image', 'full_src_path', 'full_dst_path', 'new_image', 'image_type', 'size_str', 'quality', 'orig_width', 'orig_height', 'rotation_angle', 'x_axis', 'y_axis', 'create_fnc', 'copy_fnc', 'wm_overlay_path', 'wm_use_truetype', 'dynamic_output', 'wm_font_size', 'wm_text', 'wm_vrt_alignment', 'wm_hor_alignment', 'wm_padding', 'wm_hor_offset', 'wm_vrt_offset', 'wm_font_color', 'wm_use_drop_shadow', 'wm_shadow_color', 'wm_shadow_distance', 'wm_opacity');
 109
 110                 foreach ($props as $val)
 111                 {
 112                         $this->$val = '';
 113                 }
 114
 115                 // special consideration for master_dim
 116                 $this->master_dim = 'auto';
 117         }
 118
 119         // --------------------------------------------------------------------
 120
 121         /**
 122          * initialize image preferences
 123          *
 124          * @access      public
 125          * @param       array
 126          * @return      bool
 127          */
 128         function initialize($props = array())
 129         {
 130                 /*
 131                  * Convert array elements into class variables
 132                  */
 133                 if (count($props) > 0)
 134                 {
 135                         foreach ($props as $key => $val)
 136                         {
 137                                 $this->$key = $val;
 138                         }
 139                 }
 140
 141                 /*
 142                  * Is there a source image?
 143                  *
 144                  * If not, there's no reason to continue
 145                  *
 146                  */
 147                 if ($this->source_image == '')
 148                 {
 149                         $this->set_error('imglib_source_image_required');
 150                         return FALSE;
 151                 }
 152
 153                 /*
 154                  * Is getimagesize() Available?
 155                  *
 156                  * We use it to determine the image properties (width/height).
 157                  * Note:  We need to figure out how to determine image
 158                  * properties using ImageMagick and NetPBM
 159                  *
 160                  */
 161                 if ( ! function_exists('getimagesize'))
 162                 {
 163                         $this->set_error('imglib_gd_required_for_props');
 164                         return FALSE;
 165                 }
 166
 167                 $this->image_library = strtolower($this->image_library);
 168
 169                 /*
 170                  * Set the full server path
 171                  *
 172                  * The source image may or may not contain a path.
 173                  * Either way, we'll try use realpath to generate the
 174                  * full server path in order to more reliably read it.
 175                  *
 176                  */
 177                 if (function_exists('realpath') AND @realpath($this->source_image) !== FALSE)
 178                 {
 179                         $full_source_path = str_replace("\\", "/", realpath($this->source_image));
 180                 }
 181                 else
 182                 {
 183                         $full_source_path = $this->source_image;
 184                 }
 185
 186                 $x = explode('/', $full_source_path);
 187                 $this->source_image = end($x);
 188                 $this->source_folder = str_replace($this->source_image, '', $full_source_path);
 189
 190                 // Set the Image Properties
 191                 if ( ! $this->get_image_properties($this->source_folder.$this->source_image))
 192                 {
 193                         return FALSE;
 194                 }
 195
 196                 /*
 197                  * Assign the "new" image name/path
 198                  *
 199                  * If the user has set a "new_image" name it means
 200                  * we are making a copy of the source image. If not
 201                  * it means we are altering the original.  We'll
 202                  * set the destination filename and path accordingly.
 203                  *
 204                  */
 205                 if ($this->new_image == '')
 206                 {
 207                         $this->dest_image = $this->source_image;
 208                         $this->dest_folder = $this->source_folder;
 209                 }
 210                 else
 211                 {
 212                         if (strpos($this->new_image, '/') === FALSE)
 213                         {
 214                                 $this->dest_folder = $this->source_folder;
 215                                 $this->dest_image = $this->new_image;
 216                         }
 217                         else
 218                         {
 219                                 if (function_exists('realpath') AND @realpath($this->new_image) !== FALSE)
 220                                 {
 221                                         $full_dest_path = str_replace("\\", "/", realpath($this->new_image));
 222                                 }
 223                                 else
 224                                 {
 225                                         $full_dest_path = $this->new_image;
 226                                 }
 227
 228                                 // Is there a file name?
 229                                 if ( ! preg_match("#\.(jpg|jpeg|gif|png)$#i", $full_dest_path))
 230                                 {
 231                                         $this->dest_folder = $full_dest_path.'/';
 232                                         $this->dest_image = $this->source_image;
 233                                 }
 234                                 else
 235                                 {
 236                                         $x = explode('/', $full_dest_path);
 237                                         $this->dest_image = end($x);
 238                                         $this->dest_folder = str_replace($this->dest_image, '', $full_dest_path);
 239                                 }
 240                         }
 241                 }
 242
 243                 /*
 244                  * Compile the finalized filenames/paths
 245                  *
 246                  * We'll create two master strings containing the
 247                  * full server path to the source image and the
 248                  * full server path to the destination image.
 249                  * We'll also split the destination image name
 250                  * so we can insert the thumbnail marker if needed.
 251                  *
 252                  */
 253                 if ($this->create_thumb === FALSE OR $this->thumb_marker == '')
 254                 {
 255                         $this->thumb_marker = '';
 256                 }
 257
 258                 $xp     = $this->explode_name($this->dest_image);
 259
 260                 $filename = $xp['name'];
 261                 $file_ext = $xp['ext'];
 262
 263                 $this->full_src_path = $this->source_folder.$this->source_image;
 264                 $this->full_dst_path = $this->dest_folder.$filename.$this->thumb_marker.$file_ext;
 265
 266                 /*
 267                  * Should we maintain image proportions?
 268                  *
 269                  * When creating thumbs or copies, the target width/height
 270                  * might not be in correct proportion with the source
 271                  * image's width/height.  We'll recalculate it here.
 272                  *
 273                  */
 274                 if ($this->maintain_ratio === TRUE && ($this->width != '' AND $this->height != ''))
 275                 {
 276                         $this->image_reproportion();
 277                 }
 278
 279                 /*
 280                  * Was a width and height specified?
 281                  *
 282                  * If the destination width/height was
 283                  * not submitted we will use the values
 284                  * from the actual file
 285                  *
 286                  */
 287                 if ($this->width == '')
 288                         $this->width = $this->orig_width;
 289
 290                 if ($this->height == '')
 291                         $this->height = $this->orig_height;
 292
 293                 // Set the quality
 294                 $this->quality = trim(str_replace("%", "", $this->quality));
 295
 296                 if ($this->quality == '' OR $this->quality == 0 OR ! is_numeric($this->quality))
 297                         $this->quality = 90;
 298
 299                 // Set the x/y coordinates
 300                 $this->x_axis = ($this->x_axis == '' OR ! is_numeric($this->x_axis)) ? 0 : $this->x_axis;
 301                 $this->y_axis = ($this->y_axis == '' OR ! is_numeric($this->y_axis)) ? 0 : $this->y_axis;
 302
 303                 // Watermark-related Stuff...
 304                 if ($this->wm_font_color != '')
 305                 {
 306                         if (strlen($this->wm_font_color) == 6)
 307                         {
 308                                 $this->wm_font_color = '#'.$this->wm_font_color;
 309                         }
 310                 }
 311
 312                 if ($this->wm_shadow_color != '')
 313                 {
 314                         if (strlen($this->wm_shadow_color) == 6)
 315                         {
 316                                 $this->wm_shadow_color = '#'.$this->wm_shadow_color;
 317                         }
 318                 }
 319
 320                 if ($this->wm_overlay_path != '')
 321                 {
 322                         $this->wm_overlay_path = str_replace("\\", "/", realpath($this->wm_overlay_path));
 323                 }
 324
 325                 if ($this->wm_shadow_color != '')
 326                 {
 327                         $this->wm_use_drop_shadow = TRUE;
 328                 }
 329
 330                 if ($this->wm_font_path != '')
 331                 {
 332                         $this->wm_use_truetype = TRUE;
 333                 }
 334
 335                 return TRUE;
 336         }
 337
 338         // --------------------------------------------------------------------
 339
 340         /**
 341          * Image Resize
 342          *
 343          * This is a wrapper function that chooses the proper
 344          * resize function based on the protocol specified
 345          *
 346          * @access      public
 347          * @return      bool
 348          */
 349         function resize()
 350         {
 351                 $protocol = 'image_process_'.$this->image_library;
 352
 353                 if (preg_match('/gd2$/i', $protocol))
 354                 {
 355                         $protocol = 'image_process_gd';
 356                 }
 357
 358                 return $this->$protocol('resize');
 359         }
 360
 361         // --------------------------------------------------------------------
 362
 363         /**
 364          * Image Crop
 365          *
 366          * This is a wrapper function that chooses the proper
 367          * cropping function based on the protocol specified
 368          *
 369          * @access      public
 370          * @return      bool
 371          */
 372         function crop()
 373         {
 374                 $protocol = 'image_process_'.$this->image_library;
 375
 376                 if (preg_match('/gd2$/i', $protocol))
 377                 {
 378                         $protocol = 'image_process_gd';
 379                 }
 380
 381                 return $this->$protocol('crop');
 382         }
 383
 384         // --------------------------------------------------------------------
 385
 386         /**
 387          * Image Rotate
 388          *
 389          * This is a wrapper function that chooses the proper
 390          * rotation function based on the protocol specified
 391          *
 392          * @access      public
 393          * @return      bool
 394          */
 395         function rotate()
 396         {
 397                 // Allowed rotation values
 398                 $degs = array(90, 180, 270, 'vrt', 'hor');
 399
 400                 if ($this->rotation_angle == '' OR ! in_array($this->rotation_angle, $degs))
 401                 {
 402                         $this->set_error('imglib_rotation_angle_required');
 403                         return FALSE;
 404                 }
 405
 406                 // Reassign the width and height
 407                 if ($this->rotation_angle == 90 OR $this->rotation_angle == 270)
 408                 {
 409                         $this->width    = $this->orig_height;
 410                         $this->height   = $this->orig_width;
 411                 }
 412                 else
 413                 {
 414                         $this->width    = $this->orig_width;
 415                         $this->height   = $this->orig_height;
 416                 }
 417
 418
 419                 // Choose resizing function
 420                 if ($this->image_library == 'imagemagick' OR $this->image_library == 'netpbm')
 421                 {
 422                         $protocol = 'image_process_'.$this->image_library;
 423
 424                         return $this->$protocol('rotate');
 425                 }
 426
 427                 if ($this->rotation_angle == 'hor' OR $this->rotation_angle == 'vrt')
 428                 {
 429                         return $this->image_mirror_gd();
 430                 }
 431                 else
 432                 {
 433                         return $this->image_rotate_gd();
 434                 }
 435         }
 436
 437         // --------------------------------------------------------------------
 438
 439         /**
 440          * Image Process Using GD/GD2
 441          *
 442          * This function will resize or crop
 443          *
 444          * @access      public
 445          * @param       string
 446          * @return      bool
 447          */
 448         function image_process_gd($action = 'resize')
 449         {
 450                 $v2_override = FALSE;
 451
 452                 // If the target width/height match the source, AND if the new file name is not equal to the old file name
 453                 // we'll simply make a copy of the original with the new name... assuming dynamic rendering is off.
 454                 if ($this->dynamic_output === FALSE)
 455                 {
 456                         if ($this->orig_width == $this->width AND $this->orig_height == $this->height)
 457                         {
 458                                 if ($this->source_image != $this->new_image)
 459                                 {
 460                                         if (@copy($this->full_src_path, $this->full_dst_path))
 461                                         {
 462                                                 @chmod($this->full_dst_path, DIR_WRITE_MODE);
 463                                         }
 464                                 }
 465
 466                                 return TRUE;
 467                         }
 468                 }
 469
 470                 // Let's set up our values based on the action
 471                 if ($action == 'crop')
 472                 {
 473                         //  Reassign the source width/height if cropping
 474                         $this->orig_width  = $this->width;
 475                         $this->orig_height = $this->height;
 476
 477                         // GD 2.0 has a cropping bug so we'll test for it
 478                         if ($this->gd_version() !== FALSE)
 479                         {
 480                                 $gd_version = str_replace('0', '', $this->gd_version());
 481                                 $v2_override = ($gd_version == 2) ? TRUE : FALSE;
 482                         }
 483                 }
 484                 else
 485                 {
 486                         // If resizing the x/y axis must be zero
 487                         $this->x_axis = 0;
 488                         $this->y_axis = 0;
 489                 }
 490
 491                 //  Create the image handle
 492                 if ( ! ($src_img = $this->image_create_gd()))
 493                 {
 494                         return FALSE;
 495                 }
 496
 497                 //  Create The Image
 498                 //
 499                 //  old conditional which users report cause problems with shared GD libs who report themselves as "2.0 or greater"
 500                 //  it appears that this is no longer the issue that it was in 2004, so we've removed it, retaining it in the comment
 501                 //  below should that ever prove inaccurate.
 502                 //
 503                 //  if ($this->image_library == 'gd2' AND function_exists('imagecreatetruecolor') AND $v2_override == FALSE)
 504                 if ($this->image_library == 'gd2' AND function_exists('imagecreatetruecolor'))
 505                 {
 506                         $create = 'imagecreatetruecolor';
 507                         $copy   = 'imagecopyresampled';
 508                 }
 509                 else
 510                 {
 511                         $create = 'imagecreate';
 512                         $copy   = 'imagecopyresized';
 513                 }
 514
 515                 $dst_img = $create($this->width, $this->height);
 516                 $copy($dst_img, $src_img, 0, 0, $this->x_axis, $this->y_axis, $this->width, $this->height, $this->orig_width, $this->orig_height);
 517
 518                 //  Show the image
 519                 if ($this->dynamic_output == TRUE)
 520                 {
 521                         $this->image_display_gd($dst_img);
 522                 }
 523                 else
 524                 {
 525                         // Or save it
 526                         if ( ! $this->image_save_gd($dst_img))
 527                         {
 528                                 return FALSE;
 529                         }
 530                 }
 531
 532                 //  Kill the file handles
 533                 imagedestroy($dst_img);
 534                 imagedestroy($src_img);
 535
 536                 // Set the file to 777
 537                 @chmod($this->full_dst_path, DIR_WRITE_MODE);
 538
 539                 return TRUE;
 540         }
 541
 542         // --------------------------------------------------------------------
 543
 544         /**
 545          * Image Process Using ImageMagick
 546          *
 547          * This function will resize, crop or rotate
 548          *
 549          * @access      public
 550          * @param       string
 551          * @return      bool
 552          */
 553         function image_process_imagemagick($action = 'resize')
 554         {
 555                 //  Do we have a vaild library path?
 556                 if ($this->library_path == '')
 557                 {
 558                         $this->set_error('imglib_libpath_invalid');
 559                         return FALSE;
 560                 }
 561
 562                 if ( ! preg_match("/convert$/i", $this->library_path))
 563                 {
 564                         $this->library_path = rtrim($this->library_path, '/').'/';
 565
 566                         $this->library_path .= 'convert';
 567                 }
 568
 569                 // Execute the command
 570                 $cmd = $this->library_path." -quality ".$this->quality;
 571
 572                 if ($action == 'crop')
 573                 {
 574                         $cmd .= " -crop ".$this->width."x".$this->height."+".$this->x_axis."+".$this->y_axis." \"$this->full_src_path\" \"$this->full_dst_path\" 2>&1";
 575                 }
 576                 elseif ($action == 'rotate')
 577                 {
 578                         switch ($this->rotation_angle)
 579                         {
 580                                 case 'hor'      : $angle = '-flop';
 581                                         break;
 582                                 case 'vrt'      : $angle = '-flip';
 583                                         break;
 584                                 default         : $angle = '-rotate '.$this->rotation_angle;
 585                                         break;
 586                         }
 587
 588                         $cmd .= " ".$angle." \"$this->full_src_path\" \"$this->full_dst_path\" 2>&1";
 589                 }
 590                 else  // Resize
 591                 {
 592                         $cmd .= " -resize ".$this->width."x".$this->height." \"$this->full_src_path\" \"$this->full_dst_path\" 2>&1";
 593                 }
 594
 595                 $retval = 1;
 596
 597                 @exec($cmd, $output, $retval);
 598
 599                 //      Did it work?
 600                 if ($retval > 0)
 601                 {
 602                         $this->set_error('imglib_image_process_failed');
 603                         return FALSE;
 604                 }
 605
 606                 // Set the file to 777
 607                 @chmod($this->full_dst_path, DIR_WRITE_MODE);
 608
 609                 return TRUE;
 610         }
 611
 612         // --------------------------------------------------------------------
 613
 614         /**
 615          * Image Process Using NetPBM
 616          *
 617          * This function will resize, crop or rotate
 618          *
 619          * @access      public
 620          * @param       string
 621          * @return      bool
 622          */
 623         function image_process_netpbm($action = 'resize')
 624         {
 625                 if ($this->library_path == '')
 626                 {
 627                         $this->set_error('imglib_libpath_invalid');
 628                         return FALSE;
 629                 }
 630
 631                 //  Build the resizing command
 632                 switch ($this->image_type)
 633                 {
 634                         case 1 :
 635                                                 $cmd_in         = 'giftopnm';
 636                                                 $cmd_out        = 'ppmtogif';
 637                                 break;
 638                         case 2 :
 639                                                 $cmd_in         = 'jpegtopnm';
 640                                                 $cmd_out        = 'ppmtojpeg';
 641                                 break;
 642                         case 3 :
 643                                                 $cmd_in         = 'pngtopnm';
 644                                                 $cmd_out        = 'ppmtopng';
 645                                 break;
 646                 }
 647
 648                 if ($action == 'crop')
 649                 {
 650                         $cmd_inner = 'pnmcut -left '.$this->x_axis.' -top '.$this->y_axis.' -width '.$this->width.' -height '.$this->height;
 651                 }
 652                 elseif ($action == 'rotate')
 653                 {
 654                         switch ($this->rotation_angle)
 655                         {
 656                                 case 90         :       $angle = 'r270';
 657                                         break;
 658                                 case 180        :       $angle = 'r180';
 659                                         break;
 660                                 case 270        :       $angle = 'r90';
 661                                         break;
 662                                 case 'vrt'      :       $angle = 'tb';
 663                                         break;
 664                                 case 'hor'      :       $angle = 'lr';
 665                                         break;
 666                         }
 667
 668                         $cmd_inner = 'pnmflip -'.$angle.' ';
 669                 }
 670                 else // Resize
 671                 {
 672                         $cmd_inner = 'pnmscale -xysize '.$this->width.' '.$this->height;
 673                 }
 674
 675                 $cmd = $this->library_path.$cmd_in.' '.$this->full_src_path.' | '.$cmd_inner.' | '.$cmd_out.' > '.$this->dest_folder.'netpbm.tmp';
 676
 677                 $retval = 1;
 678
 679                 @exec($cmd, $output, $retval);
 680
 681                 //  Did it work?
 682                 if ($retval > 0)
 683                 {
 684                         $this->set_error('imglib_image_process_failed');
 685                         return FALSE;
 686                 }
 687
 688                 // With NetPBM we have to create a temporary image.
 689                 // If you try manipulating the original it fails so
 690                 // we have to rename the temp file.
 691                 copy ($this->dest_folder.'netpbm.tmp', $this->full_dst_path);
 692                 unlink ($this->dest_folder.'netpbm.tmp');
 693                 @chmod($this->full_dst_path, DIR_WRITE_MODE);
 694
 695                 return TRUE;
 696         }
 697
 698         // --------------------------------------------------------------------
 699
 700         /**
 701          * Image Rotate Using GD
 702          *
 703          * @access      public
 704          * @return      bool
 705          */
 706         function image_rotate_gd()
 707         {
 708                 // Is Image Rotation Supported?
 709                 // this function is only supported as of PHP 4.3
 710                 if ( ! function_exists('imagerotate'))
 711                 {
 712                         $this->set_error('imglib_rotate_unsupported');
 713                         return FALSE;
 714                 }
 715
 716                 //  Create the image handle
 717                 if ( ! ($src_img = $this->image_create_gd()))
 718                 {
 719                         return FALSE;
 720                 }
 721
 722                 // Set the background color
 723                 // This won't work with transparent PNG files so we are
 724                 // going to have to figure out how to determine the color
 725                 // of the alpha channel in a future release.
 726
 727                 $white  = imagecolorallocate($src_img, 255, 255, 255);
 728
 729                 //  Rotate it!
 730                 $dst_img = imagerotate($src_img, $this->rotation_angle, $white);
 731
 732                 //  Save the Image
 733                 if ($this->dynamic_output == TRUE)
 734                 {
 735                         $this->image_display_gd($dst_img);
 736                 }
 737                 else
 738                 {
 739                         // Or save it
 740                         if ( ! $this->image_save_gd($dst_img))
 741                         {
 742                                 return FALSE;
 743                         }
 744                 }
 745
 746                 //  Kill the file handles
 747                 imagedestroy($dst_img);
 748                 imagedestroy($src_img);
 749
 750                 // Set the file to 777
 751
 752                 @chmod($this->full_dst_path, DIR_WRITE_MODE);
 753
 754                 return true;
 755         }
 756
 757         // --------------------------------------------------------------------
 758
 759         /**
 760          * Create Mirror Image using GD
 761          *
 762          * This function will flip horizontal or vertical
 763          *
 764          * @access      public
 765          * @return      bool
 766          */
 767         function image_mirror_gd()
 768         {
 769                 if ( ! $src_img = $this->image_create_gd())
 770                 {
 771                         return FALSE;
 772                 }
 773
 774                 $width  = $this->orig_width;
 775                 $height = $this->orig_height;
 776
 777                 if ($this->rotation_angle == 'hor')
 778                 {
 779                         for ($i = 0; $i < $height; $i++)
 780                         {
 781                                 $left  = 0;
 782                                 $right = $width-1;
 783
 784                                 while ($left < $right)
 785                                 {
 786                                         $cl = imagecolorat($src_img, $left, $i);
 787                                         $cr = imagecolorat($src_img, $right, $i);
 788
 789                                         imagesetpixel($src_img, $left, $i, $cr);
 790                                         imagesetpixel($src_img, $right, $i, $cl);
 791
 792                                         $left++;
 793                                         $right--;
 794                                 }
 795                         }
 796                 }
 797                 else
 798                 {
 799                         for ($i = 0; $i < $width; $i++)
 800                         {
 801                                 $top = 0;
 802                                 $bot = $height-1;
 803
 804                                 while ($top < $bot)
 805                                 {
 806                                         $ct = imagecolorat($src_img, $i, $top);
 807                                         $cb = imagecolorat($src_img, $i, $bot);
 808
 809                                         imagesetpixel($src_img, $i, $top, $cb);
 810                                         imagesetpixel($src_img, $i, $bot, $ct);
 811
 812                                         $top++;
 813                                         $bot--;
 814                                 }
 815                         }
 816                 }
 817
 818                 //  Show the image
 819                 if ($this->dynamic_output == TRUE)
 820                 {
 821                         $this->image_display_gd($src_img);
 822                 }
 823                 else
 824                 {
 825                         // Or save it
 826                         if ( ! $this->image_save_gd($src_img))
 827                         {
 828                                 return FALSE;
 829                         }
 830                 }
 831
 832                 //  Kill the file handles
 833                 imagedestroy($src_img);
 834
 835                 // Set the file to 777
 836                 @chmod($this->full_dst_path, DIR_WRITE_MODE);
 837
 838                 return TRUE;
 839         }
 840
 841         // --------------------------------------------------------------------
 842
 843         /**
 844          * Image Watermark
 845          *
 846          * This is a wrapper function that chooses the type
 847          * of watermarking based on the specified preference.
 848          *
 849          * @access      public
 850          * @param       string
 851          * @return      bool
 852          */
 853         function watermark()
 854         {
 855                 if ($this->wm_type == 'overlay')
 856                 {
 857                         return $this->overlay_watermark();
 858                 }
 859                 else
 860                 {
 861                         return $this->text_watermark();
 862                 }
 863         }
 864
 865         // --------------------------------------------------------------------
 866
 867         /**
 868          * Watermark - Graphic Version
 869          *
 870          * @access      public
 871          * @return      bool
 872          */
 873         function overlay_watermark()
 874         {
 875                 if ( ! function_exists('imagecolortransparent'))
 876                 {
 877                         $this->set_error('imglib_gd_required');
 878                         return FALSE;
 879                 }
 880
 881                 //  Fetch source image properties
 882                 $this->get_image_properties();
 883
 884                 //  Fetch watermark image properties
 885                 $props                  = $this->get_image_properties($this->wm_overlay_path, TRUE);
 886                 $wm_img_type    = $props['image_type'];
 887                 $wm_width               = $props['width'];
 888                 $wm_height              = $props['height'];
 889
 890                 //  Create two image resources
 891                 $wm_img  = $this->image_create_gd($this->wm_overlay_path, $wm_img_type);
 892                 $src_img = $this->image_create_gd($this->full_src_path);
 893
 894                 // Reverse the offset if necessary
 895                 // When the image is positioned at the bottom
 896                 // we don't want the vertical offset to push it
 897                 // further down.  We want the reverse, so we'll
 898                 // invert the offset.  Same with the horizontal
 899                 // offset when the image is at the right
 900
 901                 $this->wm_vrt_alignment = strtoupper(substr($this->wm_vrt_alignment, 0, 1));
 902                 $this->wm_hor_alignment = strtoupper(substr($this->wm_hor_alignment, 0, 1));
 903
 904                 if ($this->wm_vrt_alignment == 'B')
 905                         $this->wm_vrt_offset = $this->wm_vrt_offset * -1;
 906
 907                 if ($this->wm_hor_alignment == 'R')
 908                         $this->wm_hor_offset = $this->wm_hor_offset * -1;
 909
 910                 //  Set the base x and y axis values
 911                 $x_axis = $this->wm_hor_offset + $this->wm_padding;
 912                 $y_axis = $this->wm_vrt_offset + $this->wm_padding;
 913
 914                 //  Set the vertical position
 915                 switch ($this->wm_vrt_alignment)
 916                 {
 917                         case 'T':
 918                                 break;
 919                         case 'M':       $y_axis += ($this->orig_height / 2) - ($wm_height / 2);
 920                                 break;
 921                         case 'B':       $y_axis += $this->orig_height - $wm_height;
 922                                 break;
 923                 }
 924
 925                 //  Set the horizontal position
 926                 switch ($this->wm_hor_alignment)
 927                 {
 928                         case 'L':
 929                                 break;
 930                         case 'C':       $x_axis += ($this->orig_width / 2) - ($wm_width / 2);
 931                                 break;
 932                         case 'R':       $x_axis += $this->orig_width - $wm_width;
 933                                 break;
 934                 }
 935
 936                 //  Build the finalized image
 937                 if ($wm_img_type == 3 AND function_exists('imagealphablending'))
 938                 {
 939                         @imagealphablending($src_img, TRUE);
 940                 }
 941
 942                 // Set RGB values for text and shadow
 943                 $rgba = imagecolorat($wm_img, $this->wm_x_transp, $this->wm_y_transp);
 944                 $alpha = ($rgba & 0x7F000000) >> 24;
 945
 946                 // make a best guess as to whether we're dealing with an image with alpha transparency or no/binary transparency
 947                 if ($alpha > 0)
 948                 {
 949                         // copy the image directly, the image's alpha transparency being the sole determinant of blending
 950                         imagecopy($src_img, $wm_img, $x_axis, $y_axis, 0, 0, $wm_width, $wm_height);
 951                 }
 952                 else
 953                 {
 954                         // set our RGB value from above to be transparent and merge the images with the specified opacity
 955                         imagecolortransparent($wm_img, imagecolorat($wm_img, $this->wm_x_transp, $this->wm_y_transp));
 956                         imagecopymerge($src_img, $wm_img, $x_axis, $y_axis, 0, 0, $wm_width, $wm_height, $this->wm_opacity);
 957                 }
 958
 959                 //  Output the image
 960                 if ($this->dynamic_output == TRUE)
 961                 {
 962                         $this->image_display_gd($src_img);
 963                 }
 964                 else
 965                 {
 966                         if ( ! $this->image_save_gd($src_img))
 967                         {
 968                                 return FALSE;
 969                         }
 970                 }
 971
 972                 imagedestroy($src_img);
 973                 imagedestroy($wm_img);
 974
 975                 return TRUE;
 976         }
 977
 978         // --------------------------------------------------------------------
 979
 980         /**
 981          * Watermark - Text Version
 982          *
 983          * @access      public
 984          * @return      bool
 985          */
 986         function text_watermark()
 987         {
 988                 if ( ! ($src_img = $this->image_create_gd()))
 989                 {
 990                         return FALSE;
 991                 }
 992
 993                 if ($this->wm_use_truetype == TRUE AND ! file_exists($this->wm_font_path))
 994                 {
 995                         $this->set_error('imglib_missing_font');
 996                         return FALSE;
 997                 }
 998
 999                 //  Fetch source image properties
1000                 $this->get_image_properties();
1001
1002                 // Set RGB values for text and shadow
1003                 $this->wm_font_color    = str_replace('#', '', $this->wm_font_color);
1004                 $this->wm_shadow_color  = str_replace('#', '', $this->wm_shadow_color);
1005
1006                 $R1 = hexdec(substr($this->wm_font_color, 0, 2));
1007                 $G1 = hexdec(substr($this->wm_font_color, 2, 2));
1008                 $B1 = hexdec(substr($this->wm_font_color, 4, 2));
1009
1010                 $R2 = hexdec(substr($this->wm_shadow_color, 0, 2));
1011                 $G2 = hexdec(substr($this->wm_shadow_color, 2, 2));
1012                 $B2 = hexdec(substr($this->wm_shadow_color, 4, 2));
1013
1014                 $txt_color      = imagecolorclosest($src_img, $R1, $G1, $B1);
1015                 $drp_color      = imagecolorclosest($src_img, $R2, $G2, $B2);
1016
1017                 // Reverse the vertical offset
1018                 // When the image is positioned at the bottom
1019                 // we don't want the vertical offset to push it
1020                 // further down.  We want the reverse, so we'll
1021                 // invert the offset.  Note: The horizontal
1022                 // offset flips itself automatically
1023
1024                 if ($this->wm_vrt_alignment == 'B')
1025                         $this->wm_vrt_offset = $this->wm_vrt_offset * -1;
1026
1027                 if ($this->wm_hor_alignment == 'R')
1028                         $this->wm_hor_offset = $this->wm_hor_offset * -1;
1029
1030                 // Set font width and height
1031                 // These are calculated differently depending on
1032                 // whether we are using the true type font or not
1033                 if ($this->wm_use_truetype == TRUE)
1034                 {
1035                         if ($this->wm_font_size == '')
1036                                 $this->wm_font_size = '17';
1037
1038                         $fontwidth  = $this->wm_font_size-($this->wm_font_size/4);
1039                         $fontheight = $this->wm_font_size;
1040                         $this->wm_vrt_offset += $this->wm_font_size;
1041                 }
1042                 else
1043                 {
1044                         $fontwidth  = imagefontwidth($this->wm_font_size);
1045                         $fontheight = imagefontheight($this->wm_font_size);
1046                 }
1047
1048                 // Set base X and Y axis values
1049                 $x_axis = $this->wm_hor_offset + $this->wm_padding;
1050                 $y_axis = $this->wm_vrt_offset + $this->wm_padding;
1051
1052                 // Set verticle alignment
1053                 if ($this->wm_use_drop_shadow == FALSE)
1054                         $this->wm_shadow_distance = 0;
1055
1056                 $this->wm_vrt_alignment = strtoupper(substr($this->wm_vrt_alignment, 0, 1));
1057                 $this->wm_hor_alignment = strtoupper(substr($this->wm_hor_alignment, 0, 1));
1058
1059                 switch ($this->wm_vrt_alignment)
1060                 {
1061                         case     "T" :
1062                                 break;
1063                         case "M":       $y_axis += ($this->orig_height/2)+($fontheight/2);
1064                                 break;
1065                         case "B":       $y_axis += ($this->orig_height - $fontheight - $this->wm_shadow_distance - ($fontheight/2));
1066                                 break;
1067                 }
1068
1069                 $x_shad = $x_axis + $this->wm_shadow_distance;
1070                 $y_shad = $y_axis + $this->wm_shadow_distance;
1071
1072                 // Set horizontal alignment
1073                 switch ($this->wm_hor_alignment)
1074                 {
1075                         case "L":
1076                                 break;
1077                         case "R":
1078                                                 if ($this->wm_use_drop_shadow)
1079                                                         $x_shad += ($this->orig_width - $fontwidth*strlen($this->wm_text));
1080                                                         $x_axis += ($this->orig_width - $fontwidth*strlen($this->wm_text));
1081                                 break;
1082                         case "C":
1083                                                 if ($this->wm_use_drop_shadow)
1084                                                         $x_shad += floor(($this->orig_width - $fontwidth*strlen($this->wm_text))/2);
1085                                                         $x_axis += floor(($this->orig_width  -$fontwidth*strlen($this->wm_text))/2);
1086                                 break;
1087                 }
1088
1089                 //  Add the text to the source image
1090                 if ($this->wm_use_truetype)
1091                 {
1092                         if ($this->wm_use_drop_shadow)
1093                                 imagettftext($src_img, $this->wm_font_size, 0, $x_shad, $y_shad, $drp_color, $this->wm_font_path, $this->wm_text);
1094                                 imagettftext($src_img, $this->wm_font_size, 0, $x_axis, $y_axis, $txt_color, $this->wm_font_path, $this->wm_text);
1095                 }
1096                 else
1097                 {
1098                         if ($this->wm_use_drop_shadow)
1099                                 imagestring($src_img, $this->wm_font_size, $x_shad, $y_shad, $this->wm_text, $drp_color);
1100                                 imagestring($src_img, $this->wm_font_size, $x_axis, $y_axis, $this->wm_text, $txt_color);
1101                 }
1102
1103                 //  Output the final image
1104                 if ($this->dynamic_output == TRUE)
1105                 {
1106                         $this->image_display_gd($src_img);
1107                 }
1108                 else
1109                 {
1110                         $this->image_save_gd($src_img);
1111                 }
1112
1113                 imagedestroy($src_img);
1114
1115                 return TRUE;
1116         }
1117
1118         // --------------------------------------------------------------------
1119
1120         /**
1121          * Create Image - GD
1122          *
1123          * This simply creates an image resource handle
1124          * based on the type of image being processed
1125          *
1126          * @access      public
1127          * @param       string
1128          * @return      resource
1129          */
1130         function image_create_gd($path = '', $image_type = '')
1131         {
1132                 if ($path == '')
1133                         $path = $this->full_src_path;
1134
1135                 if ($image_type == '')
1136                         $image_type = $this->image_type;
1137
1138
1139                 switch ($image_type)
1140                 {
1141                         case     1 :
1142                                                 if ( ! function_exists('imagecreatefromgif'))
1143                                                 {
1144                                                         $this->set_error(array('imglib_unsupported_imagecreate', 'imglib_gif_not_supported'));
1145                                                         return FALSE;
1146                                                 }
1147
1148                                                 return imagecreatefromgif($path);
1149                                 break;
1150                         case 2 :
1151                                                 if ( ! function_exists('imagecreatefromjpeg'))
1152                                                 {
1153                                                         $this->set_error(array('imglib_unsupported_imagecreate', 'imglib_jpg_not_supported'));
1154                                                         return FALSE;
1155                                                 }
1156
1157                                                 return imagecreatefromjpeg($path);
1158                                 break;
1159                         case 3 :
1160                                                 if ( ! function_exists('imagecreatefrompng'))
1161                                                 {
1162                                                         $this->set_error(array('imglib_unsupported_imagecreate', 'imglib_png_not_supported'));
1163                                                         return FALSE;
1164                                                 }
1165
1166                                                 return imagecreatefrompng($path);
1167                                 break;
1168
1169                 }
1170
1171                 $this->set_error(array('imglib_unsupported_imagecreate'));
1172                 return FALSE;
1173         }
1174
1175         // --------------------------------------------------------------------
1176
1177         /**
1178          * Write image file to disk - GD
1179          *
1180          * Takes an image resource as input and writes the file
1181          * to the specified destination
1182          *
1183          * @access      public
1184          * @param       resource
1185          * @return      bool
1186          */
1187         function image_save_gd($resource)
1188         {
1189                 switch ($this->image_type)
1190                 {
1191                         case 1 :
1192                                                 if ( ! function_exists('imagegif'))
1193                                                 {
1194                                                         $this->set_error(array('imglib_unsupported_imagecreate', 'imglib_gif_not_supported'));
1195                                                         return FALSE;
1196                                                 }
1197
1198                                                 if ( ! @imagegif($resource, $this->full_dst_path))
1199                                                 {
1200                                                         $this->set_error('imglib_save_failed');
1201                                                         return FALSE;
1202                                                 }
1203                                 break;
1204                         case 2  :
1205                                                 if ( ! function_exists('imagejpeg'))
1206                                                 {
1207                                                         $this->set_error(array('imglib_unsupported_imagecreate', 'imglib_jpg_not_supported'));
1208                                                         return FALSE;
1209                                                 }
1210
1211                                                 if (phpversion() == '4.4.1')
1212                                                 {
1213                                                         @touch($this->full_dst_path); // PHP 4.4.1 bug #35060 - workaround
1214                                                 }
1215
1216                                                 if ( ! @imagejpeg($resource, $this->full_dst_path, $this->quality))
1217                                                 {
1218                                                         $this->set_error('imglib_save_failed');
1219                                                         return FALSE;
1220                                                 }
1221                                 break;
1222                         case 3  :
1223                                                 if ( ! function_exists('imagepng'))
1224                                                 {
1225                                                         $this->set_error(array('imglib_unsupported_imagecreate', 'imglib_png_not_supported'));
1226                                                         return FALSE;
1227                                                 }
1228
1229                                                 if ( ! @imagepng($resource, $this->full_dst_path))
1230                                                 {
1231                                                         $this->set_error('imglib_save_failed');
1232                                                         return FALSE;
1233                                                 }
1234                                 break;
1235                         default         :
1236                                                         $this->set_error(array('imglib_unsupported_imagecreate'));
1237                                                         return FALSE;
1238                                 break;
1239                 }
1240
1241                 return TRUE;
1242         }
1243
1244         // --------------------------------------------------------------------
1245
1246         /**
1247          * Dynamically outputs an image
1248          *
1249          * @access      public
1250          * @param       resource
1251          * @return      void
1252          */
1253         function image_display_gd($resource)
1254         {
1255                 header("Content-Disposition: filename={$this->source_image};");
1256                 header("Content-Type: {$this->mime_type}");
1257                 header('Content-Transfer-Encoding: binary');
1258                 header('Last-Modified: '.gmdate('D, d M Y H:i:s', time()).' GMT');
1259
1260                 switch ($this->image_type)
1261                 {
1262                         case 1          :       imagegif($resource);
1263                                 break;
1264                         case 2          :       imagejpeg($resource, '', $this->quality);
1265                                 break;
1266                         case 3          :       imagepng($resource);
1267                                 break;
1268                         default         :       echo 'Unable to display the image';
1269                                 break;
1270                 }
1271         }
1272
1273         // --------------------------------------------------------------------
1274
1275         /**
1276          * Re-proportion Image Width/Height
1277          *
1278          * When creating thumbs, the desired width/height
1279          * can end up warping the image due to an incorrect
1280          * ratio between the full-sized image and the thumb.
1281          *
1282          * This function lets us re-proportion the width/height
1283          * if users choose to maintain the aspect ratio when resizing.
1284          *
1285          * @access      public
1286          * @return      void
1287          */
1288         function image_reproportion()
1289         {
1290                 if ( ! is_numeric($this->width) OR ! is_numeric($this->height) OR $this->width == 0 OR $this->height == 0)
1291                         return;
1292
1293                 if ( ! is_numeric($this->orig_width) OR ! is_numeric($this->orig_height) OR $this->orig_width == 0 OR $this->orig_height == 0)
1294                         return;
1295
1296                 $new_width      = ceil($this->orig_width*$this->height/$this->orig_height);
1297                 $new_height     = ceil($this->width*$this->orig_height/$this->orig_width);
1298
1299                 $ratio = (($this->orig_height/$this->orig_width) - ($this->height/$this->width));
1300
1301                 if ($this->master_dim != 'width' AND $this->master_dim != 'height')
1302                 {
1303                         $this->master_dim = ($ratio < 0) ? 'width' : 'height';
1304                 }
1305
1306                 if (($this->width != $new_width) AND ($this->height != $new_height))
1307                 {
1308                         if ($this->master_dim == 'height')
1309                         {
1310                                 $this->width = $new_width;
1311                         }
1312                         else
1313                         {
1314                                 $this->height = $new_height;
1315                         }
1316                 }
1317         }
1318
1319         // --------------------------------------------------------------------
1320
1321         /**
1322          * Get image properties
1323          *
1324          * A helper function that gets info about the file
1325          *
1326          * @access      public
1327          * @param       string
1328          * @return      mixed
1329          */
1330         function get_image_properties($path = '', $return = FALSE)
1331         {
1332                 // For now we require GD but we should
1333                 // find a way to determine this using IM or NetPBM
1334
1335                 if ($path == '')
1336                         $path = $this->full_src_path;
1337
1338                 if ( ! file_exists($path))
1339                 {
1340                         $this->set_error('imglib_invalid_path');
1341                         return FALSE;
1342                 }
1343
1344                 $vals = @getimagesize($path);
1345
1346                 $types = array(1 => 'gif', 2 => 'jpeg', 3 => 'png');
1347
1348                 $mime = (isset($types[$vals['2']])) ? 'image/'.$types[$vals['2']] : 'image/jpg';
1349
1350                 if ($return == TRUE)
1351                 {
1352                         $v['width']                     = $vals['0'];
1353                         $v['height']            = $vals['1'];
1354                         $v['image_type']        = $vals['2'];
1355                         $v['size_str']          = $vals['3'];
1356                         $v['mime_type']         = $mime;
1357
1358                         return $v;
1359                 }
1360
1361                 $this->orig_width       = $vals['0'];
1362                 $this->orig_height      = $vals['1'];
1363                 $this->image_type       = $vals['2'];
1364                 $this->size_str         = $vals['3'];
1365                 $this->mime_type        = $mime;
1366
1367                 return TRUE;
1368         }
1369
1370         // --------------------------------------------------------------------
1371
1372         /**
1373          * Size calculator
1374          *
1375          * This function takes a known width x height and
1376          * recalculates it to a new size.  Only one
1377          * new variable needs to be known
1378          *
1379          *      $props = array(
1380          *                                      'width'                 => $width,
1381          *                                      'height'                => $height,
1382          *                                      'new_width'             => 40,
1383          *                                      'new_height'    => ''
1384          *                                );
1385          *
1386          * @access      public
1387          * @param       array
1388          * @return      array
1389          */
1390         function size_calculator($vals)
1391         {
1392                 if ( ! is_array($vals))
1393                 {
1394                         return;
1395                 }
1396
1397                 $allowed = array('new_width', 'new_height', 'width', 'height');
1398
1399                 foreach ($allowed as $item)
1400                 {
1401                         if ( ! isset($vals[$item]) OR $vals[$item] == '')
1402                                 $vals[$item] = 0;
1403                 }
1404
1405                 if ($vals['width'] == 0 OR $vals['height'] == 0)
1406                 {
1407                         return $vals;
1408                 }
1409
1410                 if ($vals['new_width'] == 0)
1411                 {
1412                         $vals['new_width'] = ceil($vals['width']*$vals['new_height']/$vals['height']);
1413                 }
1414                 elseif ($vals['new_height'] == 0)
1415                 {
1416                         $vals['new_height'] = ceil($vals['new_width']*$vals['height']/$vals['width']);
1417                 }
1418
1419                 return $vals;
1420         }
1421
1422         // --------------------------------------------------------------------
1423
1424         /**
1425          * Explode source_image
1426          *
1427          * This is a helper function that extracts the extension
1428          * from the source_image.  This function lets us deal with
1429          * source_images with multiple periods, like:  my.cool.jpg
1430          * It returns an associative array with two elements:
1431          * $array['ext']  = '.jpg';
1432          * $array['name'] = 'my.cool';
1433          *
1434          * @access      public
1435          * @param       array
1436          * @return      array
1437          */
1438         function explode_name($source_image)
1439         {
1440                 $ext = strrchr($source_image, '.');
1441                 $name = ($ext === FALSE) ? $source_image : substr($source_image, 0, -strlen($ext));
1442
1443                 return array('ext' => $ext, 'name' => $name);
1444         }
1445
1446         // --------------------------------------------------------------------
1447
1448         /**
1449          * Is GD Installed?
1450          *
1451          * @access      public
1452          * @return      bool
1453          */
1454         function gd_loaded()
1455         {
1456                 if ( ! extension_loaded('gd'))
1457                 {
1458                         if ( ! dl('gd.so'))
1459                         {
1460                                 return FALSE;
1461                         }
1462                 }
1463
1464                 return TRUE;
1465         }
1466
1467         // --------------------------------------------------------------------
1468
1469         /**
1470          * Get GD version
1471          *
1472          * @access      public
1473          * @return      mixed
1474          */
1475         function gd_version()
1476         {
1477                 if (function_exists('gd_info'))
1478                 {
1479                         $gd_version = @gd_info();
1480                         $gd_version = preg_replace("/\D/", "", $gd_version['GD Version']);
1481
1482                         return $gd_version;
1483                 }
1484
1485                 return FALSE;
1486         }
1487
1488         // --------------------------------------------------------------------
1489
1490         /**
1491          * Set error message
1492          *
1493          * @access      public
1494          * @param       string
1495          * @return      void
1496          */
1497         function set_error($msg)
1498         {
1499                 $CI =& get_instance();
1500                 $CI->lang->load('imglib');
1501
1502                 if (is_array($msg))
1503                 {
1504                         foreach ($msg as $val)
1505                         {
1506
1507                                 $msg = ($CI->lang->line($val) == FALSE) ? $val : $CI->lang->line($val);
1508                                 $this->error_msg[] = $msg;
1509                                 log_message('error', $msg);
1510                         }
1511                 }
1512                 else
1513                 {
1514                         $msg = ($CI->lang->line($msg) == FALSE) ? $msg : $CI->lang->line($msg);
1515                         $this->error_msg[] = $msg;
1516                         log_message('error', $msg);
1517                 }
1518         }
1519
1520         // --------------------------------------------------------------------
1521
1522         /**
1523          * Show error messages
1524          *
1525          * @access      public
1526          * @param       string
1527          * @return      string
1528          */
1529         function display_errors($open = '<p>', $close = '</p>')
1530         {
1531                 $str = '';
1532                 foreach ($this->error_msg as $val)
1533                 {
1534                         $str .= $open.$val.$close;
1535                 }
1536
1537                 return $str;
1538         }
1539
1540 }
1541 // END Image_lib Class
1542
1543 /* End of file Image_lib.php */
1544 /* Location: ./system/libraries/Image_lib.php */