PHP graphics::_replace_image_with_placeholder方法代碼示例

 /**
  * Rebuild the thumb and resize for the given item.
  * @param Item_Model $item
  */
 static function generate($item)
 {
     if ($item->thumb_dirty) {
         $ops["thumb"] = $item->thumb_path();
     }
     if ($item->resize_dirty && $item->is_photo()) {
         $ops["resize"] = $item->resize_path();
     }
     try {
         foreach ($ops as $target => $output_file) {
             $working_file = $item->file_path();
             // Delete anything that might already be there
             @unlink($output_file);
             switch ($item->type) {
                 case "movie":
                     // Run movie_extract_frame events, which can either:
                     //  - generate an output file, bypassing the ffmpeg-based movie::extract_frame
                     //  - add to the options sent to movie::extract_frame (e.g. change frame extract time,
                     //    add de-interlacing arguments to ffmpeg... see movie helper for more info)
                     // Note that the args are similar to those of the events in gallery_graphics
                     $movie_options_wrapper = new stdClass();
                     $movie_options_wrapper->movie_options = array();
                     module::event("movie_extract_frame", $working_file, $output_file, $movie_options_wrapper, $item);
                     // If no output_file generated by events, run movie::extract_frame with movie_options
                     clearstatcache();
                     if (@filesize($output_file) == 0) {
                         try {
                             movie::extract_frame($working_file, $output_file, $movie_options_wrapper->movie_options);
                             // If we're here, we know ffmpeg is installed and the movie is valid.  Because the
                             // user may not always have had ffmpeg installed, the movie's width, height, and
                             // mime type may need updating.  Let's use this opportunity to make sure they're
                             // correct.  It's not optimal to do it at this low level, but it's not trivial to find
                             // these cases quickly in an upgrade script.
                             list($width, $height, $mime_type) = movie::get_file_metadata($working_file);
                             // Only set them if they need updating to avoid marking them as "changed"
                             if ($item->width != $width || $item->height != $height || $item->mime_type != $mime_type) {
                                 $item->width = $width;
                                 $item->height = $height;
                                 $item->mime_type = $mime_type;
                             }
                         } catch (Exception $e) {
                             // Didn't work, likely because of MISSING_FFMPEG - use placeholder
                             graphics::_replace_image_with_placeholder($item, $target);
                             break;
                         }
                     }
                     $working_file = $output_file;
                 case "photo":
                     // Run the graphics rules (for both movies and photos)
                     foreach (self::_get_rules($target) as $rule) {
                         $args = array($working_file, $output_file, unserialize($rule->args), $item);
                         call_user_func_array($rule->operation, $args);
                         $working_file = $output_file;
                     }
                     break;
                 case "album":
                     if (!($cover = $item->album_cover())) {
                         // This album has no cover; copy its placeholder image.  Because of an old bug, it's
                         // possible that there's an album cover item id that points to an invalid item.  In that
                         // case, just null out the album cover item id.  It's not optimal to do that at this low
                         // level, but it's not trivial to find these cases quickly in an upgrade script and if we
                         // don't do this, the album may be permanently marked as "needs rebuilding"
                         //
                         // ref: http://sourceforge.net/apps/trac/gallery/ticket/1172
                         //      http://galleryproject.org/node/96926
                         if ($item->album_cover_item_id) {
                             $item->album_cover_item_id = null;
                             $item->save();
                         }
                         graphics::_replace_image_with_placeholder($item, $target);
                         break;
                     }
                     if ($cover->thumb_dirty) {
                         graphics::generate($cover);
                     }
                     if (!$cover->thumb_dirty) {
                         // Make the album cover from the cover item's thumb.  Run gallery_graphics::resize with
                         // null options and it will figure out if this is a direct copy or conversion to jpg.
                         $working_file = $cover->thumb_path();
                         gallery_graphics::resize($working_file, $output_file, null, $item);
                     }
                     break;
             }
         }
         if (!empty($ops["thumb"])) {
             if (file_exists($item->thumb_path())) {
                 $item->thumb_dirty = 0;
             } else {
                 Kohana_Log::add("error", "Failed to rebuild thumb image: {$item->title}");
                 graphics::_replace_image_with_placeholder($item, "thumb");
             }
         }
         if (!empty($ops["resize"])) {
             if (file_exists($item->resize_path())) {
                 $item->resize_dirty = 0;
             } else {
//.........這裏部分代碼省略.........