title =& $title;
$this->name = $title->getDBkey();
$n = strrpos( $this->name, '.' );
$this->extension = strtolower( $n ? substr( $this->name, $n + 1 ) : '' );
$this->historyLine = 0;
$this->dataLoaded = false;
}
/**
* Get the memcached keys
* Returns an array, first element is the local cache key, second is the shared cache key, if there is one
*/
function getCacheKeys( $shared = false ) {
global $wgDBname, $wgUseSharedUploads, $wgSharedUploadDBname, $wgCacheSharedUploads;
$foundCached = false;
$hashedName = md5($this->name);
$keys = array( "$wgDBname:Image:$hashedName" );
if ( $wgUseSharedUploads && $wgSharedUploadDBname && $wgCacheSharedUploads ) {
$keys[] = "$wgSharedUploadDBname:Image:$hashedName";
}
return $keys;
}
/**
* Try to load image metadata from memcached. Returns true on success.
*/
function loadFromCache() {
global $wgUseSharedUploads, $wgMemc;
$fname = 'Image::loadFromMemcached';
wfProfileIn( $fname );
$this->dataLoaded = false;
$keys = $this->getCacheKeys();
$cachedValues = $wgMemc->get( $keys[0] );
// Check if the key existed and belongs to this version of MediaWiki
if (!empty($cachedValues) && is_array($cachedValues) && isset($cachedValues['width']) && $cachedValues['fileExists']) {
if ( $wgUseSharedUploads && $cachedValues['fromShared']) {
# if this is shared file, we need to check if image
# in shared repository has not changed
if ( isset( $keys[1] ) ) {
$commonsCachedValues = $wgMemc->get( $keys[1] );
if (!empty($commonsCachedValues) && is_array($commonsCachedValues) && isset($commonsCachedValues['width'])) {
$this->name = $commonsCachedValues['name'];
$this->imagePath = $commonsCachedValues['imagePath'];
$this->fileExists = $commonsCachedValues['fileExists'];
$this->width = $commonsCachedValues['width'];
$this->height = $commonsCachedValues['height'];
$this->bits = $commonsCachedValues['bits'];
$this->type = $commonsCachedValues['type'];
$this->fromSharedDirectory = true;
$this->dataLoaded = true;
}
}
}
else {
$this->name = $cachedValues['name'];
$this->imagePath = $cachedValues['imagePath'];
$this->fileExists = $cachedValues['fileExists'];
$this->width = $cachedValues['width'];
$this->height = $cachedValues['height'];
$this->bits = $cachedValues['bits'];
$this->type = $cachedValues['type'];
$this->fromSharedDirectory = false;
$this->dataLoaded = true;
}
}
wfProfileOut( $fname );
return $this->dataLoaded;
}
/**
* Save the image metadata to memcached
*/
function saveToCache() {
global $wgMemc;
$this->load();
// We can't cache metadata for non-existent files, because if the file later appears
// in commons, the local keys won't be purged.
if ( $this->fileExists ) {
$keys = $this->getCacheKeys();
$cachedValues = array('name' => $this->name,
'imagePath' => $this->imagePath,
'fileExists' => $this->fileExists,
'fromShared' => $this->fromSharedDirectory,
'width' => $this->width,
'height' => $this->height,
'bits' => $this->bits,
'type' => $this->type);
$wgMemc->set( $keys[0], $cachedValues );
}
}
/**
* Load metadata from the file itself
*/
function loadFromFile() {
global $wgUseSharedUploads, $wgSharedUploadDirectory;
$fname = 'Image::loadFromFile';
wfProfileIn( $fname );
$this->imagePath = $this->getFullPath();
$this->fileExists = file_exists( $this->imagePath );
$gis = false;
# If the file is not found, and a non-wiki shared upload directory is used, look for it there.
if (!$this->fileExists && $wgUseSharedUploads && $wgSharedUploadDirectory) {
# In case we're on a wgCapitalLinks=false wiki, we
# capitalize the first letter of the filename before
# looking it up in the shared repository.
$this->name = $wgLang->ucfirst($name);
$this->imagePath = $this->getFullPath(true);
$this->fileExists = file_exists( $this->imagePath);
$this->fromSharedDirectory = true;
}
if ( $this->fileExists ) {
# Get size in bytes
$s = stat( $this->imagePath );
$this->size = $s['size'];
# Height and width
# Don't try to get the width and height of sound and video files, that's bad for performance
if ( !Image::isKnownImageExtension( $this->extension ) ) {
$gis = false;
} elseif( $this->extension == 'svg' ) {
wfSuppressWarnings();
$gis = wfGetSVGsize( $this->imagePath );
wfRestoreWarnings();
} else {
wfSuppressWarnings();
$gis = getimagesize( $this->imagePath );
wfRestoreWarnings();
}
}
if( $gis === false ) {
$this->width = 0;
$this->height = 0;
$this->bits = 0;
$this->type = 0;
} else {
$this->width = $gis[0];
$this->height = $gis[1];
$this->type = $gis[2];
if ( isset( $gis['bits'] ) ) {
$this->bits = $gis['bits'];
} else {
$this->bits = 0;
}
}
$this->dataLoaded = true;
wfProfileOut( $fname );
}
/**
* Load image metadata from the DB
*/
function loadFromDB() {
global $wgUseSharedUploads, $wgSharedUploadDBname, $wgLang;
$fname = 'Image::loadFromDB';
wfProfileIn( $fname );
$dbr =& wfGetDB( DB_SLAVE );
$row = $dbr->selectRow( 'image',
array( 'img_size', 'img_width', 'img_height', 'img_bits', 'img_type' ),
array( 'img_name' => $this->name ), $fname );
if ( $row ) {
$this->fromSharedDirectory = false;
$this->fileExists = true;
$this->loadFromRow( $row );
$this->imagePath = $this->getFullPath();
} elseif ( $wgUseSharedUploads && $wgSharedUploadDBname ) {
# In case we're on a wgCapitalLinks=false wiki, we
# capitalize the first letter of the filename before
# looking it up in the shared repository.
$name = $wgLang->ucfirst($this->name);
$row = $dbr->selectRow( "`$wgSharedUploadDBname`.image",
array( 'img_size', 'img_width', 'img_height', 'img_bits', 'img_type' ),
array( 'img_name' => $name ), $fname );
if ( $row ) {
$this->fromSharedDirectory = true;
$this->fileExists = true;
$this->imagePath = '';
$this->name = $name;
$this->loadFromRow( $row );
}
}
if ( !$row ) {
$this->size = 0;
$this->width = 0;
$this->height = 0;
$this->bits = 0;
$this->type = 0;
$this->fileExists = false;
$this->fromSharedDirectory = false;
}
# Unconditionally set loaded=true, we don't want the accessors constantly rechecking
$this->dataLoaded = true;
}
/*
* Load image metadata from a DB result row
*/
function loadFromRow( &$row ) {
$this->size = $row->img_size;
$this->width = $row->img_width;
$this->height = $row->img_height;
$this->bits = $row->img_bits;
$this->type = $row->img_type;
$this->dataLoaded = true;
}
/**
* Load image metadata from cache or DB, unless already loaded
*/
function load() {
if ( !$this->dataLoaded ) {
if ( !$this->loadFromCache() ) {
$this->loadFromDB();
if ( $this->fileExists ) {
$this->saveToCache();
}
}
$this->dataLoaded = true;
}
}
/**
* Return the name of this image
* @access public
*/
function getName() {
return $this->name;
}
/**
* Return the associated title object
* @access public
*/
function getTitle() {
return $this->title;
}
/**
* Return the URL of the image file
* @access public
*/
function getURL() {
if ( !$this->url ) {
$this->load();
if($this->fileExists) {
$this->url = Image::imageUrl( $this->name, $this->fromSharedDirectory );
} else {
$this->url = '';
}
}
return $this->url;
}
function getViewURL() {
if( $this->mustRender() ) {
return $this->createThumb( $this->getWidth() );
} else {
return $this->getURL();
}
}
/**
* Return the image path of the image in the
* local file system as an absolute path
* @access public
*/
function getImagePath() {
$this->load();
return $this->imagePath;
}
/**
* Return the width of the image
*
* Returns -1 if the file specified is not a known image type
* @access public
*/
function getWidth() {
$this->load();
return $this->width;
}
/**
* Return the height of the image
*
* Returns -1 if the file specified is not a known image type
* @access public
*/
function getHeight() {
$this->load();
return $this->height;
}
/**
* Return the size of the image file, in bytes
* @access public
*/
function getSize() {
$this->load();
return $this->size;
}
/**
* Return the type of the image
*
* - 1 GIF
* - 2 JPG
* - 3 PNG
* - 15 WBMP
* - 16 XBM
*/
function getType() {
$this->load();
return $this->type;
}
/**
* Return the escapeLocalURL of this image
* @access public
*/
function getEscapeLocalURL() {
$this->getTitle();
return $this->title->escapeLocalURL();
}
/**
* Return the escapeFullURL of this image
* @access public
*/
function getEscapeFullURL() {
$this->getTitle();
return $this->title->escapeFullURL();
}
/**
* Return the URL of an image, provided its name.
*
* @param string $name Name of the image, without the leading "Image:"
* @param boolean $fromSharedDirectory Should this be in $wgSharedUploadPath?
* @access public
* @static
*/
function imageUrl( $name, $fromSharedDirectory = false ) {
global $wgUploadPath,$wgUploadBaseUrl,$wgSharedUploadPath;
if($fromSharedDirectory) {
$base = '';
$path = $wgSharedUploadPath;
} else {
$base = $wgUploadBaseUrl;
$path = $wgUploadPath;
}
$url = "{$base}{$path}" . wfGetHashPath($name, $fromSharedDirectory) . "{$name}";
return wfUrlencode( $url );
}
/**
* Returns true if the image file exists on disk.
*
* @access public
*/
function exists() {
$this->load();
return $this->fileExists;
}
/**
*
* @access private
*/
function thumbUrl( $width, $subdir='thumb') {
global $wgUploadPath, $wgUploadBaseUrl,
$wgSharedUploadPath,$wgSharedUploadDirectory;
$name = $this->thumbName( $width );
if($this->fromSharedDirectory) {
$base = '';
$path = $wgSharedUploadPath;
} else {
$base = $wgUploadBaseUrl;
$path = $wgUploadPath;
}
$url = "{$base}{$path}/{$subdir}" .
wfGetHashPath($name, $this->fromSharedDirectory)
. "{$name}";
return wfUrlencode($url);
}
/**
* Return the file name of a thumbnail of the specified width
*
* @param integer $width Width of the thumbnail image
* @param boolean $shared Does the thumbnail come from the shared repository?
* @access private
*/
function thumbName( $width, $shared=false ) {
$thumb = $width."px-".$this->name;
if( $this->extension == 'svg' ) {
# Rasterize SVG vector images to PNG
$thumb .= '.png';
}
return $thumb;
}
/**
* Create a thumbnail of the image having the specified width/height.
* The thumbnail will not be created if the width is larger than the
* image's width. Let the browser do the scaling in this case.
* The thumbnail is stored on disk and is only computed if the thumbnail
* file does not exist OR if it is older than the image.
* Returns the URL.
*
* Keeps aspect ratio of original image. If both width and height are
* specified, the generated image will be no bigger than width x height,
* and will also have correct aspect ratio.
*
* @param integer $width maximum width of the generated thumbnail
* @param integer $height maximum height of the image (optional)
* @access public
*/
function createThumb( $width, $height=-1 ) {
$thumb = $this->getThumbnail( $width, $height );
if( is_null( $thumb ) ) return '';
return $thumb->getUrl();
}
/**
* As createThumb, but returns a ThumbnailImage object. This can
* provide access to the actual file, the real size of the thumb,
* and can produce a convenient tag for you.
*
* @param integer $width maximum width of the generated thumbnail
* @param integer $height maximum height of the image (optional)
* @return ThumbnailImage
* @access public
*/
function &getThumbnail( $width, $height=-1 ) {
if ( $height == -1 ) {
return $this->renderThumb( $width );
}
if ( $width < $this->width ) {
$thumbheight = $this->height * $width / $this->width;
$thumbwidth = $width;
} else {
$thumbheight = $this->height;
$thumbwidth = $this->width;
}
if ( $thumbheight > $height ) {
$thumbwidth = $thumbwidth * $height / $thumbheight;
$thumbheight = $height;
}
$thumb = $this->renderThumb( $thumbwidth );
if( is_null( $thumb ) ) {
$thumb = $this->iconThumb();
}
return $thumb;
}
/**
* @return ThumbnailImage
*/
function iconThumb() {
global $wgStylePath, $wgStyleDirectory;
$try = array( 'fileicon-' . $this->extension . '.png', 'fileicon.png' );
foreach( $try as $icon ) {
$path = '/common/images/' . $icon;
$filepath = $wgStyleDirectory . $path;
if( file_exists( $filepath ) ) {
return new ThumbnailImage( $filepath, $wgStylePath . $path );
}
}
return null;
}
/**
* Create a thumbnail of the image having the specified width.
* The thumbnail will not be created if the width is larger than the
* image's width. Let the browser do the scaling in this case.
* The thumbnail is stored on disk and is only computed if the thumbnail
* file does not exist OR if it is older than the image.
* Returns an object which can return the pathname, URL, and physical
* pixel size of the thumbnail -- or null on failure.
*
* @return ThumbnailImage
* @access private
*/
function /* private */ renderThumb( $width ) {
global $wgImageMagickConvertCommand;
global $wgUseImageMagick;
global $wgUseSquid, $wgInternalServer;
$width = IntVal( $width );
$thumbName = $this->thumbName( $width, $this->fromSharedDirectory );
$thumbPath = wfImageThumbDir( $thumbName, 'thumb', $this->fromSharedDirectory ).'/'.$thumbName;
$thumbUrl = $this->thumbUrl( $width );
#wfDebug ( "Render name: $thumbName path: $thumbPath url: $thumbUrl\n");
if ( ! $this->exists() )
{
# If there is no image, there will be no thumbnail
return null;
}
# Sanity check $width
if( $width <= 0 ) {
# BZZZT
return null;
}
if( $width > $this->width && !$this->mustRender() ) {
# Don't make an image bigger than the source
return new ThumbnailImage( $this->getImagePath(), $this->getViewURL() );
}
if ( (! file_exists( $thumbPath ) ) || ( filemtime($thumbPath) < filemtime($this->imagePath) ) ) {
if( $this->extension == 'svg' ) {
global $wgSVGConverters, $wgSVGConverter;
if( isset( $wgSVGConverters[$wgSVGConverter] ) ) {
global $wgSVGConverterPath;
$cmd = str_replace(
array( '$path/', '$width', '$input', '$output' ),
array( $wgSVGConverterPath,
$width,
escapeshellarg( $this->imagePath ),
escapeshellarg( $thumbPath ) ),
$wgSVGConverters[$wgSVGConverter] );
$conv = shell_exec( $cmd );
} else {
$conv = false;
}
} elseif ( $wgUseImageMagick ) {
# use ImageMagick
# Specify white background color, will be used for transparent images
# in Internet Explorer/Windows instead of default black.
$cmd = $wgImageMagickConvertCommand .
" -quality 85 -background white -geometry {$width} ".
escapeshellarg($this->imagePath) . " " .
escapeshellarg($thumbPath);
$conv = shell_exec( $cmd );
} else {
# Use PHP's builtin GD library functions.
#
# First find out what kind of file this is, and select the correct
# input routine for this.
$truecolor = false;
switch( $this->type ) {
case 1: # GIF
$src_image = imagecreatefromgif( $this->imagePath );
break;
case 2: # JPG
$src_image = imagecreatefromjpeg( $this->imagePath );
$truecolor = true;
break;
case 3: # PNG
$src_image = imagecreatefrompng( $this->imagePath );
$truecolor = ( $this->bits > 8 );
break;
case 15: # WBMP for WML
$src_image = imagecreatefromwbmp( $this->imagePath );
break;
case 16: # XBM
$src_image = imagecreatefromxbm( $this->imagePath );
break;
default:
return 'Image type not supported';
break;
}
$height = floor( $this->height * ( $width/$this->width ) );
if ( $truecolor ) {
$dst_image = imagecreatetruecolor( $width, $height );
} else {
$dst_image = imagecreate( $width, $height );
}
imagecopyresampled( $dst_image, $src_image,
0,0,0,0,
$width, $height, $this->width, $this->height );
switch( $this->type ) {
case 1: # GIF
case 3: # PNG
case 15: # WBMP
case 16: # XBM
#$thumbUrl .= ".png";
#$thumbPath .= ".png";
imagepng( $dst_image, $thumbPath );
break;
case 2: # JPEG
#$thumbUrl .= ".jpg";
#$thumbPath .= ".jpg";
imageinterlace( $dst_image );
imagejpeg( $dst_image, $thumbPath, 95 );
break;
default:
break;
}
imagedestroy( $dst_image );
imagedestroy( $src_image );
}
#
# Check for zero-sized thumbnails. Those can be generated when
# no disk space is available or some other error occurs
#
if( file_exists( $thumbPath ) ) {
$thumbstat = stat( $thumbPath );
if( $thumbstat['size'] == 0 ) {
unlink( $thumbPath );
}
}
# Purge squid
# This has to be done after the image is updated and present for all machines on NFS,
# or else the old version might be stored into the squid again
if ( $wgUseSquid ) {
$urlArr = Array(
$wgInternalServer.$thumbUrl
);
wfPurgeSquidServers($urlArr);
}
}
return new ThumbnailImage( $thumbPath, $thumbUrl );
} // END OF function createThumb
/**
* Return the image history of this image, line by line.
* starts with current version, then old versions.
* uses $this->historyLine to check which line to return:
* 0 return line for current version
* 1 query for old versions, return first one
* 2, ... return next old version from above query
*
* @access public
*/
function nextHistoryLine() {
$fname = 'Image::nextHistoryLine()';
$dbr =& wfGetDB( DB_SLAVE );
if ( $this->historyLine == 0 ) {// called for the first time, return line from cur
$this->historyRes = $dbr->select( 'image',
array( 'img_size','img_description','img_user','img_user_text','img_timestamp', "'' AS oi_archive_name" ),
array( 'img_name' => $this->title->getDBkey() ),
$fname
);
if ( 0 == wfNumRows( $this->historyRes ) ) {
return FALSE;
}
} else if ( $this->historyLine == 1 ) {
$this->historyRes = $dbr->select( 'oldimage',
array( 'oi_size AS img_size', 'oi_description AS img_description', 'oi_user AS img_user',
'oi_user_text AS img_user_text', 'oi_timestamp AS img_timestamp', 'oi_archive_name'
), array( 'oi_name' => $this->title->getDBkey() ), $fname, array( 'ORDER BY' => 'oi_timestamp DESC' )
);
}
$this->historyLine ++;
return $dbr->fetchObject( $this->historyRes );
}
/**
* Reset the history pointer to the first element of the history
* @access public
*/
function resetHistory() {
$this->historyLine = 0;
}
/**
* Return true if the file is of a type that can't be directly
* rendered by typical browsers and needs to be re-rasterized.
* @return bool
*/
function mustRender() {
$this->load();
return ( $this->extension == 'svg' );
}
/**
* Return the full filesystem path to the file. Note that this does
* not mean that a file actually exists under that location.
*
* This path depends on whether directory hashing is active or not,
* i.e. whether the images are all found in the same directory,
* or in hashed paths like /images/3/3c.
*
* @access public
* @param boolean $fromSharedDirectory Return the path to the file
* in a shared repository (see $wgUseSharedRepository and related
* options in DefaultSettings.php) instead of a local one.
*
*/
function getFullPath( $fromSharedRepository = false ) {
global $wgUploadDirectory, $wgSharedUploadDirectory;
global $wgHashedUploadDirectory, $wgHashedSharedUploadDirectory;
$dir = $fromSharedRepository ? $wgSharedUploadDirectory :
$wgUploadDirectory;
$name = $this->name;
$fullpath = $dir . wfGetHashPath($name, $fromSharedRepository) . $name;
return $fullpath;
}
/**
* @return bool
* @static
*/
function isKnownImageExtension( $ext ) {
static $extensions = array( 'svg', 'png', 'jpg', 'jpeg', 'gif', 'bmp', 'xbm' );
return in_array( $ext, $extensions );
}
/**
* Record an image upload in the upload log and the image table
*/
function recordUpload( $oldver, $desc, $copyStatus = '', $source = '' ) {
global $wgUser, $wgLang, $wgTitle, $wgOut, $wgDeferredUpdateList;
global $wgUseCopyrightUpload;
$fname = 'Image::recordUpload';
$dbw =& wfGetDB( DB_MASTER );
# img_name must be unique
if ( !$dbw->indexUnique( 'image', 'img_name' ) && !$dbw->indexExists('image','PRIMARY') ) {
wfDebugDieBacktrace( 'Database schema not up to date, please run maintenance/archives/patch-image_name_unique.sql' );
}
// Fill metadata fields by querying the file
$this->loadFromFile();
$this->saveToCache();
// Fail now if the image isn't there
if ( !$this->fileExists || $this->fromSharedDirectory ) {
return false;
}
if ( $wgUseCopyrightUpload ) {
$textdesc = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $desc . "\n" .
'== ' . wfMsg ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
'== ' . wfMsg ( 'filesource' ) . " ==\n" . $source ;
} else {
$textdesc = $desc;
}
$now = wfTimestampNow();
# Test to see if the row exists using INSERT IGNORE
# This avoids race conditions by locking the row until the commit, and also
# doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition.
$dbw->insert( 'image',
array(
'img_name' => $this->name,
'img_size'=> $this->size,
'img_width' => $this->width,
'img_height' => $this->height,
'img_bits' => $this->bits,
'img_type' => $this->type,
'img_timestamp' => $dbw->timestamp($now),
'img_description' => $desc,
'img_user' => $wgUser->getID(),
'img_user_text' => $wgUser->getName(),
), $fname, 'IGNORE'
);
$descTitle = $this->getTitle();
if ( $dbw->affectedRows() ) {
# Successfully inserted, this is a new image
$id = $descTitle->getArticleID();
if ( $id == 0 ) {
$article = new Article( $descTitle );
$article->insertNewArticle( $textdesc, $desc, false, false, true );
}
} else {
# Collision, this is an update of an image
# Insert previous contents into oldimage
$dbw->insertSelect( 'oldimage', 'image',
array(
'oi_name' => 'img_name',
'oi_archive_name' => $dbw->addQuotes( $oldver ),
'oi_size' => 'img_size',
'oi_width' => 'img_width',
'oi_height' => 'img_height',
'oi_bits' => 'img_bits',
'oi_type' => 'img_type',
'oi_timestamp' => 'img_timestamp',
'oi_description' => 'img_description',
'oi_user' => 'img_user',
'oi_user_text' => 'img_user_text',
), array( 'img_name' => $this->name ), $fname
);
# Update the current image row
$dbw->update( 'image',
array( /* SET */
'img_size' => $this->size,
'img_width' => $this->width,
'img_height' => $this->height,
'img_bits' => $this->bits,
'img_type' => $this->type,
'img_timestamp' => $dbw->timestamp(),
'img_user' => $wgUser->getID(),
'img_user_text' => $wgUser->getName(),
'img_description' => $desc,
), array( /* WHERE */
'img_name' => $this->name
), $fname
);
# Invalidate the cache for the description page
$descTitle->invalidateCache();
}
$log = new LogPage( 'upload' );
$log->addEntry( 'upload', $descTitle, $desc );
return true;
}
} //class
/**
* Returns the image directory of an image
* If the directory does not exist, it is created.
* The result is an absolute path.
*
* @param string $fname file name of the image file
* @access public
*/
function wfImageDir( $fname ) {
global $wgUploadDirectory, $wgHashedUploadDirectory;
if (!$wgHashedUploadDirectory) { return $wgUploadDirectory; }
$hash = md5( $fname );
$oldumask = umask(0);
$dest = $wgUploadDirectory . '/' . $hash{0};
if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
$dest .= '/' . substr( $hash, 0, 2 );
if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
umask( $oldumask );
return $dest;
}
/**
* Returns the image directory of an image's thubnail
* If the directory does not exist, it is created.
* The result is an absolute path.
*
* @param string $fname file name of the thumbnail file, including file size prefix
* @param string $subdir (optional) subdirectory of the image upload directory that should be used for storing the thumbnail. Default is 'thumb'
* @param boolean $shared (optional) use the shared upload directory
* @access public
*/
function wfImageThumbDir( $fname , $subdir='thumb', $shared=false) {
return wfImageArchiveDir( $fname, $subdir, $shared );
}
/**
* Returns the image directory of an image's old version
* If the directory does not exist, it is created.
* The result is an absolute path.
*
* @param string $fname file name of the thumbnail file, including file size prefix
* @param string $subdir (optional) subdirectory of the image upload directory that should be used for storing the old version. Default is 'archive'
* @param boolean $shared (optional) use the shared upload directory (only relevant for other functions which call this one)
* @access public
*/
function wfImageArchiveDir( $fname , $subdir='archive', $shared=false ) {
global $wgUploadDirectory, $wgHashedUploadDirectory,
$wgSharedUploadDirectory, $wgHashedSharedUploadDirectory;
$dir = $shared ? $wgSharedUploadDirectory : $wgUploadDirectory;
$hashdir = $shared ? $wgHashedSharedUploadDirectory : $wgHashedUploadDirectory;
if (!$hashdir) { return $dir.'/'.$subdir; }
$hash = md5( $fname );
$oldumask = umask(0);
# Suppress warning messages here; if the file itself can't
# be written we'll worry about it then.
$archive = $dir.'/'.$subdir;
if ( ! is_dir( $archive ) ) { @mkdir( $archive, 0777 ); }
$archive .= '/' . $hash{0};
if ( ! is_dir( $archive ) ) { @mkdir( $archive, 0777 ); }
$archive .= '/' . substr( $hash, 0, 2 );
if ( ! is_dir( $archive ) ) { @mkdir( $archive, 0777 ); }
umask( $oldumask );
return $archive;
}
/*
* Return the hash path component of an image path (URL or filesystem),
* e.g. "/3/3c/", or just "/" if hashing is not used.
*
* @param $dbkey The filesystem / database name of the file
* @param $fromSharedDirectory Use the shared file repository? It may
* use different hash settings from the local one.
*/
function wfGetHashPath ( $dbkey, $fromSharedDirectory = false ) {
global $wgHashedSharedUploadDirectory, $wgSharedUploadDirectory;
global $wgHashedUploadDirectory;
$ishashed = $fromSharedDirectory ? $wgHashedSharedUploadDirectory :
$wgHashedUploadDirectory;
if($ishashed) {
$hash = md5($dbkey);
return '/' . $hash{0} . '/' . substr( $hash, 0, 2 ) . '/';
} else {
return '/';
}
}
/**
* Returns the image URL of an image's old version
*
* @param string $fname file name of the image file
* @param string $subdir (optional) subdirectory of the image upload directory that is used by the old version. Default is 'archive'
* @access public
*/
function wfImageArchiveUrl( $name, $subdir='archive' ) {
global $wgUploadPath, $wgHashedUploadDirectory;
if ($wgHashedUploadDirectory) {
$hash = md5( substr( $name, 15) );
$url = $wgUploadPath.'/'.$subdir.'/' . $hash{0} . '/' .
substr( $hash, 0, 2 ) . '/'.$name;
} else {
$url = $wgUploadPath.'/'.$subdir.'/'.$name;
}
return wfUrlencode($url);
}
/**
* Return a rounded pixel equivalent for a labeled CSS/SVG length.
* http://www.w3.org/TR/SVG11/coords.html#UnitIdentifiers
*
* @param string $length
* @return int Length in pixels
*/
function wfScaleSVGUnit( $length ) {
static $unitLength = array(
'px' => 1.0,
'pt' => 1.25,
'pc' => 15.0,
'mm' => 3.543307,
'cm' => 35.43307,
'in' => 90.0,
'' => 1.0, // "User units" pixels by default
'%' => 2.0, // Fake it!
);
if( preg_match( '/^(\d+)(em|ex|px|pt|pc|cm|mm|in|%|)$/', $length, $matches ) ) {
$length = FloatVal( $matches[1] );
$unit = $matches[2];
return round( $length * $unitLength[$unit] );
} else {
// Assume pixels
return round( FloatVal( $length ) );
}
}
/**
* Compatible with PHP getimagesize()
* @todo support gzipped SVGZ
* @todo check XML more carefully
* @todo sensible defaults
*
* @param string $filename
* @return array
*/
function wfGetSVGsize( $filename ) {
$width = 256;
$height = 256;
// Read a chunk of the file
$f = fopen( $filename, "rt" );
if( !$f ) return false;
$chunk = fread( $f, 4096 );
fclose( $f );
// Uber-crappy hack! Run through a real XML parser.
if( !preg_match( '/