156 lines
3.7 KiB
PHP
156 lines
3.7 KiB
PHP
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<?php
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# Class to represent an image
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# Provides methods to retrieve paths (physical, logical, URL),
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# to generate thumbnails or for uploading.
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class Image
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{
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/* private */
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var $name, # name of the image
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$imagePath, # Path of the image
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$url, # Image URL
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$title; # Title object for this image. Initialized when needed.
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function Image( $name )
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{
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$this->name = $name;
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$this->imagePath = wfImagePath( $name );
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$this->url = wfImageUrl( $name );
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$this->title = NULL;
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}
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function newFromTitle( $nt )
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{
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$img = new Image( $nt->getDBKey() );
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$img->title = $nt;
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return $img;
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}
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function getName()
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{
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return $this->name;
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}
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function getURL()
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{
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return $this->url;
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}
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function getImagePath()
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{
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return $this->imagePath;
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}
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function getEscapeLocalURL()
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{
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if ( $this->title == NULL )
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{
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$this->title = Title::makeTitle( Namespace::getImage(), $this->name );
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}
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return $this->title->escapeLocalURL();
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}
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function createThumb( $width ) {
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global $wgUploadDirectory;
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global $wgImageMagickConvertCommand;
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global $wgUseImageMagick;
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global $wgUseSquid, $wgInternalServer;
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$thumbName = $width."px-".$this->name;
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$thumbPath = wfImageThumbDir( $thumbName )."/".$thumbName;
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$thumbUrl = wfImageThumbUrl( $thumbName );
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if ( ! file_exists( $this->imagePath ) )
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{
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# If there is no image, there will be no thumbnail
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return "";
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}
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if ( (! file_exists( $thumbPath ) )
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|| ( filemtime($thumbPath) < filemtime($this->imagePath) ) ) {
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# Squid purging
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if ( $wgUseSquid ) {
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$urlArr = Array(
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$wgInternalServer.$thumbUrl
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);
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wfPurgeSquidServers($urlArr);
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}
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if ( $wgUseImageMagick ) {
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# use ImageMagick
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$cmd = $wgImageMagickConvertCommand .
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" -quality 85 -geometry {$width} ".
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escapeshellarg($this->imagePath) . " " .
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escapeshellarg($thumbPath);
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$conv = shell_exec( $cmd );
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} else {
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# Use PHP's builtin GD library functions.
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#
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# First find out what kind of file this is, and select the correct
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# input routine for this.
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list($src_width, $src_height, $src_type, $src_attr) = getimagesize( $this->imagePath );
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switch( $src_type ) {
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case 1: # GIF
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$src_image = imagecreatefromgif( $this->imagePath );
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break;
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case 2: # JPG
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$src_image = imagecreatefromjpeg( $this->imagePath );
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break;
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case 3: # PNG
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$src_image = imagecreatefrompng( $this->imagePath );
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break;
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case 15: # WBMP for WML
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$src_image = imagecreatefromwbmp( $this->imagePath );
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break;
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case 16: # XBM
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$src_image = imagecreatefromxbm( $this->imagePath );
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break;
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default:
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return "Image type not supported";
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break;
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}
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$height = floor( $src_height * ( $width/$src_width ) );
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$dst_image = imagecreatetruecolor( $width, $height );
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imagecopyresampled( $dst_image, $src_image,
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0,0,0,0,
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$width, $height, $src_width, $src_height );
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switch( $src_type ) {
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case 1: # GIF
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case 3: # PNG
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case 15: # WBMP
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case 16: # XBM
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#$thumbUrl .= ".png";
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#$thumbPath .= ".png";
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imagepng( $dst_image, $thumbPath );
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break;
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case 2: # JPEG
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#$thumbUrl .= ".jpg";
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#$thumbPath .= ".jpg";
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imageinterlace( $dst_image );
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imagejpeg( $dst_image, $thumbPath, 95 );
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break;
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default:
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break;
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}
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imagedestroy( $dst_image );
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imagedestroy( $src_image );
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}
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#
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# Check for zero-sized thumbnails. Those can be generated when
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# no disk space is available or some other error occurs
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#
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$thumbstat = stat( $thumbPath );
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$imgstat = stat( $this->imagePath );
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if( $thumbstat["size"] == 0 )
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{
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unlink( $thumbPath );
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}
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}
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return $thumbUrl;
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} //function createThumb
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} //class
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