includes/Image.php

   1 <?php
   2 /**
   3  * @package MediaWiki
   4  * $Id$
   5  */
   6
   7 /**
   8  * Class to represent an image
   9  *
  10  * Provides methods to retrieve paths (physical, logical, URL),
  11  * to generate thumbnails or for uploading.
  12  * @package MediaWiki
  13  */
  14 class Image
  15 {
  16         /**#@+
  17          * @access private
  18          */
  19         var     $name,          # name of the image
  20                 $imagePath,     # Path of the image
  21                 $url,           # Image URL
  22                 $title,         # Title object for this image. Initialized when needed.
  23                 $fileExists,    # does the image file exist on disk?
  24                 $fromSharedDirectory, # load this image from $wgSharedUploadDirectory
  25                 $historyLine,   # Number of line to return by nextHistoryLine()
  26                 $historyRes,    # result of the query for the image's history
  27                 $width,         # \
  28                 $height,        #  |
  29                 $bits,          #   --- returned by getimagesize, see http://de3.php.net/manual/en/function.getimagesize.php
  30                 $type,          #  |
  31                 $attr;          # /
  32
  33         /**#@-*/
  34
  35
  36         /**
  37          * Create an Image object from an image name
  38          *
  39          * @param string $name name of the image, used to create a title object using Title::makeTitleSafe
  40          * @access public
  41          */
  42         function Image( $name )
  43         {
  44                 global $wgUploadDirectory,$wgHashedUploadDirectory,
  45                        $wgUseSharedUploads, $wgSharedUploadDirectory,
  46                        $wgHashedSharedUploadDirectory,$wgUseLatin1,
  47                        $wgSharedLatin1,$wgLang;
  48
  49                 $this->name      = $name;
  50                 $this->title     = Title::makeTitleSafe( NS_IMAGE, $this->name );
  51                 $this->fromSharedDirectory = false;
  52                 if ($wgHashedUploadDirectory) {
  53                         $hash            = md5( $this->title->getDBkey() );
  54                         $this->imagePath = $wgUploadDirectory . '/' . $hash{0} . '/' .
  55                                                 substr( $hash, 0, 2 ) . "/{$name}";
  56                 } else {
  57                         $this->imagePath = $wgUploadDirectory . '/' . $name;
  58                 }
  59                 $this->fileExists = file_exists( $this->imagePath);
  60
  61                 # If the file is not found, and a shared upload directory
  62                 # like the Wikimedia Commons is used, look for it there.
  63                 if (!$this->fileExists && $wgUseSharedUploads) {
  64                         # in case we're running a capitallinks=false wiki
  65                         $sharedname=$wgLang->ucfirst($name);
  66                         $sharedtitle=$wgLang->ucfirst($this->title->getDBkey());
  67                         if($wgUseLatin1 && !$wgSharedLatin1) {
  68                                 $sharedname=utf8_encode($sharedname);
  69                                 $sharedtitle=utf8_encode($sharedtitle);
  70                         }
  71
  72                         if($wgHashedSharedUploadDirectory) {
  73                                 $hash = md5( $sharedtitle );
  74                                 $this->imagePath = $wgSharedUploadDirectory . '/' . $hash{0} . '/' .
  75                                         substr( $hash, 0, 2 ) . "/".$sharedname;
  76                         } else {
  77                                 $this->imagePath = $wgSharedUploadDirectory . '/' . $sharedname;
  78                         }
  79                         $this->fileExists = file_exists( $this->imagePath);
  80                         $this->fromSharedDirectory = true;
  81                 }
  82                 if($this->fileExists) {
  83                         $this->url       = $this->wfImageUrl( $sharedname, $this->fromSharedDirectory );
  84                 } else {
  85                         $this->url='';
  86                 }
  87
  88                 $n = strrpos( $name, '.' );
  89                 $this->extension = strtolower( $n ? substr( $name, $n + 1 ) : '' );
  90
  91
  92                 if ( $this->fileExists )
  93                 {
  94                         if( $this->extension == 'svg' ) {
  95                                 @$gis = getSVGsize( $this->imagePath );
  96                         } else {
  97                                 @$gis = getimagesize( $this->imagePath );
  98                         }
  99                         if( $gis !== false ) {
 100                                 $this->width = $gis[0];
 101                                 $this->height = $gis[1];
 102                                 $this->type = $gis[2];
 103                                 $this->attr = $gis[3];
 104                                 if ( isset( $gis['bits'] ) )  {
 105                                         $this->bits = $gis['bits'];
 106                                 } else {
 107                                         $this->bits = 0;
 108                                 }
 109                         }
 110                 }
 111                 $this->historyLine = 0;
 112         }
 113
 114         /**
 115          * Factory function
 116          *
 117          * Create a new image object from a title object.
 118          *
 119          * @param Title $nt Title object. Must be from namespace "image"
 120          * @access public
 121          */
 122         function newFromTitle( $nt )
 123         {
 124                 $img = new Image( $nt->getDBKey() );
 125                 $img->title = $nt;
 126                 return $img;
 127         }
 128
 129         /**
 130          * Return the name of this image
 131          * @access public
 132          */
 133         function getName()
 134         {
 135                 return $this->name;
 136         }
 137
 138         /**
 139          * Return the associated title object
 140          * @access public
 141          */
 142         function getTitle()
 143         {
 144                 return $this->title;
 145         }
 146
 147         /**
 148          * Return the URL of the image file
 149          * @access public
 150          */
 151         function getURL()
 152         {
 153                 return $this->url;
 154         }
 155
 156         function getViewURL() {
 157                 if( $this->mustRender() ) {
 158                         return $this->createThumb( $this->getWidth() );
 159                 } else {
 160                         return $this->getURL();
 161                 }
 162         }
 163
 164         /**
 165          * Return the image path of the image in the
 166          * local file system as an absolute path
 167          * @access public
 168          */
 169         function getImagePath()
 170         {
 171                 return $this->imagePath;
 172         }
 173
 174         /**
 175          * Return the width of the image
 176          *
 177          * Returns -1 if the file specified is not a known image type
 178          * @access public
 179          */
 180         function getWidth()
 181         {
 182                 return $this->width;
 183         }
 184
 185         /**
 186          * Return the height of the image
 187          *
 188          * Returns -1 if the file specified is not a known image type
 189          * @access public
 190          */
 191         function getHeight()
 192         {
 193                 return $this->height;
 194         }
 195
 196         /**
 197          * Return the size of the image file, in bytes
 198          * @access public
 199          */
 200         function getSize()
 201         {
 202                 $st = stat( $this->getImagePath() );
 203                 return $st['size'];
 204         }
 205
 206         /**
 207          * Return the type of the image
 208          *
 209          * -  1 GIF
 210          * -  2 JPG
 211          * -  3 PNG
 212          * - 15 WBMP
 213          * - 16 XBM
 214          */
 215         function getType()
 216         {
 217                 return $this->type;
 218         }
 219
 220         /**
 221          * Return the escapeLocalURL of this image
 222          * @access public
 223          */
 224         function getEscapeLocalURL()
 225         {
 226                 return $this->title->escapeLocalURL();
 227         }
 228
 229         /**
 230          * Return the escapeFullURL of this image
 231          * @access public
 232          */
 233         function getEscapeFullURL()
 234         {
 235                 return $this->title->escapeFullURL();
 236         }
 237
 238         /**
 239          * Return the URL of an image, provided its name.
 240          *
 241          * @param string $name  Name of the image, without the leading "Image:"
 242          * @param boolean $fromSharedDirectory  Should this be in $wgSharedUploadPath?
 243          * @access public
 244          */
 245         function wfImageUrl( $name, $fromSharedDirectory = false )
 246         {
 247                 global $wgUploadPath,$wgUploadBaseUrl,$wgHashedUploadDirectory,
 248                        $wgHashedSharedUploadDirectory,$wgSharedUploadPath,
 249                        $wgUseLatin1, $wgSharedLatin1;
 250                 if($fromSharedDirectory) {
 251                         $hash = $wgHashedSharedUploadDirectory;
 252                         $base = '';
 253                         $path = $wgSharedUploadPath;
 254                         if($wgUseLatin1 && !$wgSharedLatin1) {
 255                                 $name=utf8_encode($name);
 256                         }
 257                 } else {
 258                         $hash = $wgHashedUploadDirectory;
 259                         $base = $wgUploadBaseUrl;
 260                         $path = $wgUploadPath;
 261                 }
 262                 if ( $hash ) {
 263                         $hash = md5( $name );
 264                         $url = "{$base}{$path}/" . $hash{0} . "/" .
 265                         substr( $hash, 0, 2 ) . "/{$name}";
 266                 } else {
 267                         $url = "{$base}{$path}/{$name}";
 268                 }
 269                 return wfUrlencode( $url );
 270         }
 271
 272         /**
 273          * Returns true iff the image file exists on disk.
 274          *
 275          * @access public
 276          */
 277         function exists()
 278         {
 279                 return $this->fileExists;
 280         }
 281
 282         /**
 283          *
 284          * @access private
 285          */
 286         function thumbUrl( $width, $subdir='thumb') {
 287                 global $wgUploadPath,$wgHashedUploadDirectory, $wgUploadBaseUrl,
 288                        $wgSharedUploadPath,$wgSharedUploadDirectory,
 289                        $wgHashedSharedUploadDirectory,$wgUseLatin1,$wgSharedLatin1;
 290                 $name = $this->thumbName( $width );
 291                 if($this->fromSharedDirectory) {
 292                         $hashdir = $wgHashedSharedUploadDirectory;
 293                         $base = '';
 294                         $path = $wgSharedUploadPath;
 295                         if($wgUseLatin1 && !$wgSharedLatin1) {
 296                                 $name=utf8_encode($name);
 297                         }
 298                 } else {
 299                         $hashdir = $wgHashedUploadDirectory;
 300                         $base = $wgUploadBaseUrl;
 301                         $path = $wgUploadPath;
 302                 }
 303                 if ($hashdir) {
 304                         $hash = md5( $name );
 305                         $url = "{$base}{$path}/{$subdir}/" . $hash{0} . "/" .
 306                                 substr( $hash, 0, 2 ) . "/{$name}";
 307                 } else {
 308                         $url = "{$base}{$path}/{$subdir}/{$name}";
 309                 }
 310
 311                 return wfUrlencode($url);
 312         }
 313
 314         /**
 315          * Return the file name of a thumbnail of the specified width
 316          *
 317          * @param integer $width        Width of the thumbnail image
 318          * @param boolean $shared       Does the thumbnail come from the shared repository?
 319          * @access private
 320          */
 321         function thumbName( $width, $shared=false ) {
 322                 global $wgUseLatin1,$wgSharedLatin1;
 323                 $thumb = $width."px-".$this->name;
 324                 if( $this->extension == 'svg' ) {
 325                         # Rasterize SVG vector images to PNG
 326                         $thumb .= '.png';
 327                 }
 328                 if( $shared && $wgUseLatin1 && !$wgSharedLatin1) {
 329                         $thumb=utf8_encode($thumb);
 330                 }
 331                 return $thumb;
 332         }
 333
 334         /**
 335          * Create a thumbnail of the image having the specified width/height.
 336          * The thumbnail will not be created if the width is larger than the
 337          * image's width. Let the browser do the scaling in this case.
 338          * The thumbnail is stored on disk and is only computed if the thumbnail
 339          * file does not exist OR if it is older than the image.
 340          * Returns the URL.
 341          *
 342          * Keeps aspect ratio of original image. If both width and height are
 343          * specified, the generated image will be no bigger than width x height,
 344          * and will also have correct aspect ratio.
 345          *
 346          * @param integer $width        maximum width of the generated thumbnail
 347          * @param integer $height       maximum height of the image (optional)
 348          * @access public
 349          */
 350         function createThumb( $width, $height=-1 ) {
 351                 if ( $height == -1 ) {
 352                         return $this->renderThumb( $width );
 353                 }
 354                 if ( $width < $this->width ) {
 355                         $thumbheight = $this->height * $width / $this->width;
 356                         $thumbwidth = $width;
 357                 } else {
 358                         $thumbheight = $this->height;
 359                         $thumbwidth = $this->width;
 360                 }
 361                 if ( $thumbheight > $height ) {
 362                         $thumbwidth = $thumbwidth * $height / $thumbheight;
 363                         $thumbheight = $height;
 364                 }
 365                 return $this->renderThumb( $thumbwidth );
 366         }
 367
 368         /**
 369          * Create a thumbnail of the image having the specified width.
 370          * The thumbnail will not be created if the width is larger than the
 371          * image's width. Let the browser do the scaling in this case.
 372          * The thumbnail is stored on disk and is only computed if the thumbnail
 373          * file does not exist OR if it is older than the image.
 374          * Returns the URL.
 375          *
 376          * @access private
 377          */
 378         function /* private */ renderThumb( $width ) {
 379                 global $wgImageMagickConvertCommand;
 380                 global $wgUseImageMagick;
 381                 global $wgUseSquid, $wgInternalServer;
 382
 383                 $width = IntVal( $width );
 384
 385                 $thumbName = $this->thumbName( $width, $this->fromSharedDirectory );
 386                 $thumbPath = wfImageThumbDir( $thumbName, 'thumb', $this->fromSharedDirectory ).'/'.$thumbName;
 387                 $thumbUrl  = $this->thumbUrl( $width );
 388                 #wfDebug ( "Render name: $thumbName path: $thumbPath url: $thumbUrl\n");
 389                 if ( ! $this->exists() )
 390                 {
 391                         # If there is no image, there will be no thumbnail
 392                         return '';
 393                 }
 394
 395                 # Sanity check $width
 396                 if( $width <= 0 ) {
 397                         # BZZZT
 398                         return '';
 399                 }
 400
 401                 if( $width > $this->width && !$this->mustRender() ) {
 402                         # Don't make an image bigger than the source
 403                         return $this->getViewURL();
 404                 }
 405
 406                 if ( (! file_exists( $thumbPath ) ) || ( filemtime($thumbPath) < filemtime($this->imagePath) ) ) {
 407                         if( $this->extension == 'svg' ) {
 408                                 global $wgSVGConverters, $wgSVGConverter;
 409                                 if( isset( $wgSVGConverters[$wgSVGConverter] ) ) {
 410                                         global $wgSVGConverterPath;
 411                                         $cmd = str_replace(
 412                                                 array( '$path/', '$width', '$input', '$output' ),
 413                                                 array( $wgSVGConverterPath,
 414                                                            $width,
 415                                                            escapeshellarg( $this->imagePath ),
 416                                                            escapeshellarg( $thumbPath ) ),
 417                                                 $wgSVGConverters[$wgSVGConverter] );
 418                                         $conv = shell_exec( $cmd );
 419                                 } else {
 420                                         $conv = false;
 421                                 }
 422                         } elseif ( $wgUseImageMagick ) {
 423                                 # use ImageMagick
 424                                 # Specify white background color, will be used for transparent images
 425                                 # in Internet Explorer/Windows instead of default black.
 426                                 $cmd  =  $wgImageMagickConvertCommand .
 427                                         " -quality 85 -background white -geometry {$width} ".
 428                                         escapeshellarg($this->imagePath) . " " .
 429                                         escapeshellarg($thumbPath);
 430                                 $conv = shell_exec( $cmd );
 431                         } else {
 432                                 # Use PHP's builtin GD library functions.
 433                                 #
 434                                 # First find out what kind of file this is, and select the correct
 435                                 # input routine for this.
 436
 437                                 $truecolor = false;
 438
 439                                 switch( $this->type ) {
 440                                         case 1: # GIF
 441                                                 $src_image = imagecreatefromgif( $this->imagePath );
 442                                                 break;
 443                                         case 2: # JPG
 444                                                 $src_image = imagecreatefromjpeg( $this->imagePath );
 445                                                 $truecolor = true;
 446                                                 break;
 447                                         case 3: # PNG
 448                                                 $src_image = imagecreatefrompng( $this->imagePath );
 449                                                 $truecolor = ( $this->bits > 8 );
 450                                                 break;
 451                                         case 15: # WBMP for WML
 452                                                 $src_image = imagecreatefromwbmp( $this->imagePath );
 453                                                 break;
 454                                         case 16: # XBM
 455                                                 $src_image = imagecreatefromxbm( $this->imagePath );
 456                                                 break;
 457                                         default:
 458                                                 return 'Image type not supported';
 459                                                 break;
 460                                 }
 461                                 $height = floor( $this->height * ( $width/$this->width ) );
 462                                 if ( $truecolor ) {
 463                                         $dst_image = imagecreatetruecolor( $width, $height );
 464                                 } else {
 465                                         $dst_image = imagecreate( $width, $height );
 466                                 }
 467                                 imagecopyresampled( $dst_image, $src_image,
 468                                                         0,0,0,0,
 469                                                         $width, $height, $this->width, $this->height );
 470                                 switch( $this->type ) {
 471                                         case 1:  # GIF
 472                                         case 3:  # PNG
 473                                         case 15: # WBMP
 474                                         case 16: # XBM
 475                                                 #$thumbUrl .= ".png";
 476                                                 #$thumbPath .= ".png";
 477                                                 imagepng( $dst_image, $thumbPath );
 478                                                 break;
 479                                         case 2:  # JPEG
 480                                                 #$thumbUrl .= ".jpg";
 481                                                 #$thumbPath .= ".jpg";
 482                                                 imageinterlace( $dst_image );
 483                                                 imagejpeg( $dst_image, $thumbPath, 95 );
 484                                                 break;
 485                                         default:
 486                                                 break;
 487                                 }
 488                                 imagedestroy( $dst_image );
 489                                 imagedestroy( $src_image );
 490
 491
 492                         }
 493                         #
 494                         # Check for zero-sized thumbnails. Those can be generated when
 495                         # no disk space is available or some other error occurs
 496                         #
 497                         $thumbstat = stat( $thumbPath );
 498                         if( $thumbstat['size'] == 0 )
 499                         {
 500                                 unlink( $thumbPath );
 501                         }
 502
 503                         # Purge squid
 504                         # This has to be done after the image is updated and present for all machines on NFS,
 505                         # or else the old version might be stored into the squid again
 506                         if ( $wgUseSquid ) {
 507                                 $urlArr = Array(
 508                                         $wgInternalServer.$thumbUrl
 509                                 );
 510                                 wfPurgeSquidServers($urlArr);
 511                         }
 512                 }
 513                 return $thumbUrl;
 514         } // END OF function createThumb
 515
 516         /**
 517          * Return the image history of this image, line by line.
 518          * starts with current version, then old versions.
 519          * uses $this->historyLine to check which line to return:
 520          *  0      return line for current version
 521          *  1      query for old versions, return first one
 522          *  2, ... return next old version from above query
 523          *
 524          * @access public
 525          */
 526         function nextHistoryLine()
 527         {
 528                 $fname = 'Image::nextHistoryLine()';
 529                 $dbr =& wfGetDB( DB_SLAVE );
 530                 if ( $this->historyLine == 0 ) {// called for the first time, return line from cur
 531                         $this->historyRes = $dbr->select( 'image',
 532                                 array( 'img_size','img_description','img_user','img_user_text','img_timestamp', "'' AS oi_archive_name" ),
 533                                 array( 'img_name' => $this->title->getDBkey() ),
 534                                 $fname
 535                         );
 536                         if ( 0 == wfNumRows( $this->historyRes ) ) {
 537                                 return FALSE;
 538                         }
 539                 } else if ( $this->historyLine == 1 ) {
 540                         $this->historyRes = $dbr->select( 'oldimage',
 541                                 array( 'oi_size AS img_size', 'oi_description AS img_description', 'oi_user AS img_user',
 542                                         'oi_user_text AS img_user_text', 'oi_timestamp AS img_timestamp', 'oi_archive_name'
 543                                 ), array( 'oi_name' => $this->title->getDBkey() ), $fname, array( 'ORDER BY' => 'oi_timestamp DESC' )
 544                         );
 545                 }
 546                 $this->historyLine ++;
 547
 548                 return $dbr->fetchObject( $this->historyRes );
 549         }
 550
 551         /**
 552          * Reset the history pointer to the first element of the history
 553          * @access public
 554          */
 555         function resetHistory()
 556         {
 557                 $this->historyLine = 0;
 558         }
 559
 560         /**
 561          * Return true if the file is of a type that can't be directly
 562          * rendered by typical browsers and needs to be re-rasterized.
 563          * @return bool
 564          */
 565         function mustRender() {
 566                 return ( $this->extension == 'svg' );
 567         }
 568
 569 } //class
 570
 571
 572 /**
 573  * Returns the image directory of an image
 574  * If the directory does not exist, it is created.
 575  * The result is an absolute path.
 576  *
 577  * @param string $fname         file name of the image file
 578  * @access public
 579  */
 580 function wfImageDir( $fname )
 581 {
 582         global $wgUploadDirectory, $wgHashedUploadDirectory;
 583
 584         if (!$wgHashedUploadDirectory) { return $wgUploadDirectory; }
 585
 586         $hash = md5( $fname );
 587         $oldumask = umask(0);
 588         $dest = $wgUploadDirectory . '/' . $hash{0};
 589         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 590         $dest .= '/' . substr( $hash, 0, 2 );
 591         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 592
 593         umask( $oldumask );
 594         return $dest;
 595 }
 596
 597 /**
 598  * Returns the image directory of an image's thubnail
 599  * If the directory does not exist, it is created.
 600  * The result is an absolute path.
 601  *
 602  * @param string $fname         file name of the thumbnail file, including file size prefix
 603  * @param string $subdir        (optional) subdirectory of the image upload directory that should be used for storing the thumbnail. Default is 'thumb'
 604  * @param boolean $shared       (optional) use the shared upload directory
 605  * @access public
 606  */
 607 function wfImageThumbDir( $fname , $subdir='thumb', $shared=false)
 608 {
 609         return wfImageArchiveDir( $fname, $subdir, $shared );
 610 }
 611
 612 /**
 613  * Returns the image directory of an image's old version
 614  * If the directory does not exist, it is created.
 615  * The result is an absolute path.
 616  *
 617  * @param string $fname         file name of the thumbnail file, including file size prefix
 618  * @param string $subdir        (optional) subdirectory of the image upload directory that should be used for storing the old version. Default is 'archive'
 619  * @param boolean $shared       (optional) use the shared upload directory (only relevant for other functions which call this one)
 620  * @access public
 621  */
 622 function wfImageArchiveDir( $fname , $subdir='archive', $shared=false )
 623 {
 624         global $wgUploadDirectory, $wgHashedUploadDirectory,
 625                $wgSharedUploadDirectory, $wgHashedSharedUploadDirectory;
 626         $dir = $shared ? $wgSharedUploadDirectory : $wgUploadDirectory;
 627         $hashdir = $shared ? $wgHashedSharedUploadDirectory : $wgHashedUploadDirectory;
 628         if (!$hashdir) { return $dir.'/'.$subdir; }
 629         $hash = md5( $fname );
 630         $oldumask = umask(0);
 631         # Suppress warning messages here; if the file itself can't
 632         # be written we'll worry about it then.
 633         $archive = $dir.'/'.$subdir;
 634         if ( ! is_dir( $archive ) ) { @mkdir( $archive, 0777 ); }
 635         $archive .= '/' . $hash{0};
 636         if ( ! is_dir( $archive ) ) { @mkdir( $archive, 0777 ); }
 637         $archive .= '/' . substr( $hash, 0, 2 );
 638         if ( ! is_dir( $archive ) ) { @mkdir( $archive, 0777 ); }
 639
 640         umask( $oldumask );
 641         return $archive;
 642 }
 643
 644 /**
 645  * Record an image upload in the upload log.
 646  */
 647 function wfRecordUpload( $name, $oldver, $size, $desc, $copyStatus = "", $source = "" )
 648 {
 649         global $wgUser, $wgLang, $wgTitle, $wgOut, $wgDeferredUpdateList;
 650         global $wgUseCopyrightUpload;
 651
 652         $fname = 'wfRecordUpload';
 653         $dbw =& wfGetDB( DB_MASTER );
 654
 655         # img_name must be unique
 656         if ( !$dbw->indexUnique( 'image', 'img_name' ) && !$dbw->indexExists('image','PRIMARY') ) {
 657                 wfDebugDieBacktrace( 'Database schema not up to date, please run maintenance/archives/patch-image_name_unique.sql' );
 658         }
 659
 660
 661         $now = wfTimestampNow();
 662         $won = wfInvertTimestamp( $now );
 663         $size = IntVal( $size );
 664
 665         if ( $wgUseCopyrightUpload )
 666           {
 667                 $textdesc = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $desc . "\n" .
 668                   '== ' . wfMsg ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
 669                   '== ' . wfMsg ( 'filesource' ) . " ==\n" . $source ;
 670           }
 671         else $textdesc = $desc ;
 672
 673         $now = wfTimestampNow();
 674         $won = wfInvertTimestamp( $now );
 675
 676         # Test to see if the row exists using INSERT IGNORE
 677         # This avoids race conditions by locking the row until the commit, and also
 678         # doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition.
 679         $dbw->insert( 'image',
 680                 array(
 681                         'img_name' => $name,
 682                         'img_size'=> $size,
 683                         'img_timestamp' => $dbw->timestamp($now),
 684                         'img_description' => $desc,
 685                         'img_user' => $wgUser->getID(),
 686                         'img_user_text' => $wgUser->getName(),
 687                 ), $fname, 'IGNORE'
 688         );
 689         $descTitle = Title::makeTitleSafe( NS_IMAGE, $name );
 690
 691         if ( $dbw->affectedRows() ) {
 692                 # Successfully inserted, this is a new image
 693                 $id = $descTitle->getArticleID();
 694
 695                 if ( $id == 0 ) {
 696                         $seqVal = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
 697                         $dbw->insert( 'cur',
 698                                 array(
 699                                         'cur_id' => $seqVal,
 700                                         'cur_namespace' => NS_IMAGE,
 701                                         'cur_title' => $name,
 702                                         'cur_comment' => $desc,
 703                                         'cur_user' => $wgUser->getID(),
 704                                         'cur_user_text' => $wgUser->getName(),
 705                                         'cur_timestamp' => $dbw->timestamp($now),
 706                                         'cur_is_new' => 1,
 707                                         'cur_text' => $textdesc,
 708                                         'inverse_timestamp' => $won,
 709                                         'cur_touched' => $dbw->timestamp($now)
 710                                 ), $fname
 711                         );
 712                         $id = $dbw->insertId() or 0; # We should throw an error instead
 713
 714                         RecentChange::notifyNew( $now, $descTitle, 0, $wgUser, $desc );
 715
 716                         $u = new SearchUpdate( $id, $name, $desc );
 717                         $u->doUpdate();
 718                 }
 719         } else {
 720                 # Collision, this is an update of an image
 721                 # Get current image row for update
 722                 $s = $dbw->selectRow( 'image', array( 'img_name','img_size','img_timestamp','img_description',
 723                   'img_user','img_user_text' ), array( 'img_name' => $name ), $fname, 'FOR UPDATE' );
 724
 725                 # Insert it into oldimage
 726                 $dbw->insert( 'oldimage',
 727                         array(
 728                                 'oi_name' => $s->img_name,
 729                                 'oi_archive_name' => $oldver,
 730                                 'oi_size' => $s->img_size,
 731                                 'oi_timestamp' => $dbw->timestamp($s->img_timestamp),
 732                                 'oi_description' => $s->img_description,
 733                                 'oi_user' => $s->img_user,
 734                                 'oi_user_text' => $s->img_user_text
 735                         ), $fname
 736                 );
 737
 738                 # Update the current image row
 739                 $dbw->update( 'image',
 740                         array( /* SET */
 741                                 'img_size' => $size,
 742                                 'img_timestamp' => $dbw->timestamp(),
 743                                 'img_user' => $wgUser->getID(),
 744                                 'img_user_text' => $wgUser->getName(),
 745                                 'img_description' => $desc,
 746                         ), array( /* WHERE */
 747                                 'img_name' => $name
 748                         ), $fname
 749                 );
 750
 751                 # Invalidate the cache for the description page
 752                 $descTitle->invalidateCache();
 753         }
 754
 755         $log = new LogPage( 'upload' );
 756         $log->addEntry( 'upload', $descTitle, $desc );
 757 }
 758
 759 /**
 760  * Returns the image URL of an image's old version
 761  *
 762  * @param string $fname         file name of the image file
 763  * @param string $subdir        (optional) subdirectory of the image upload directory that is used by the old version. Default is 'archive'
 764  * @access public
 765  */
 766 function wfImageArchiveUrl( $name, $subdir='archive' )
 767 {
 768         global $wgUploadPath, $wgHashedUploadDirectory;
 769
 770         if ($wgHashedUploadDirectory) {
 771                 $hash = md5( substr( $name, 15) );
 772                 $url = $wgUploadPath.'/'.$subdir.'/' . $hash{0} . '/' .
 773                   substr( $hash, 0, 2 ) . '/'.$name;
 774         } else {
 775                 $url = $wgUploadPath.'/'.$subdir.'/'.$name;
 776         }
 777         return wfUrlencode($url);
 778 }
 779
 780 /**
 781  * Return a rounded pixel equivalent for a labeled CSS/SVG length.
 782  * http://www.w3.org/TR/SVG11/coords.html#UnitIdentifiers
 783  *
 784  * @param string $length
 785  * @return int Length in pixels
 786  */
 787 function scaleSVGUnit( $length ) {
 788         static $unitLength = array(
 789                 'px' => 1.0,
 790                 'pt' => 1.25,
 791                 'pc' => 15.0,
 792                 'mm' => 3.543307,
 793                 'cm' => 35.43307,
 794                 'in' => 90.0,
 795                 ''   => 1.0, // "User units" pixels by default
 796                 '%'  => 2.0, // Fake it!
 797                 );
 798         if( preg_match( '/^(\d+)(em|ex|px|pt|pc|cm|mm|in|%|)$/', $length, $matches ) ) {
 799                 $length = FloatVal( $matches[1] );
 800                 $unit = $matches[2];
 801                 return round( $length * $unitLength[$unit] );
 802         } else {
 803                 // Assume pixels
 804                 return round( FloatVal( $length ) );
 805         }
 806 }
 807
 808 /**
 809  * Compatible with PHP getimagesize()
 810  * @todo support gzipped SVGZ
 811  * @todo check XML more carefully
 812  * @todo sensible defaults
 813  *
 814  * @param string $filename
 815  * @return array
 816  */
 817 function getSVGsize( $filename ) {
 818         $width = 256;
 819         $height = 256;
 820
 821         // Read a chunk of the file
 822         $f = fopen( $filename, "rt" );
 823         if( !$f ) return false;
 824         $chunk = fread( $f, 4096 );
 825         fclose( $f );
 826
 827         // Uber-crappy hack! Run through a real XML parser.
 828         if( !preg_match( '/<svg\s*([^>]*)\s*>/s', $chunk, $matches ) ) {
 829                 return false;
 830         }
 831         $tag = $matches[1];
 832         if( preg_match( '/\bwidth\s*=\s*("[^"]+"|\'[^\']+\')/s', $tag, $matches ) ) {
 833                 $width = scaleSVGUnit( trim( substr( $matches[1], 1, -1 ) ) );
 834         }
 835         if( preg_match( '/\bheight\s*=\s*("[^"]+"|\'[^\']+\')/s', $tag, $matches ) ) {
 836                 $height = scaleSVGUnit( trim( substr( $matches[1], 1, -1 ) ) );
 837         }
 838
 839         return array( $width, $height, 'SVG',
 840                 "width=\"$width\" height=\"$height\"" );
 841 }
 842
 843 ?>