手册：$wgThumbnailBuckets
| 缩略图设置: $wgThumbnailBuckets | |
|---|---|
| List of intermediary thumbnail sizes to use to speed up thumbnail rendering. |
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| 引进版本： | 1.24.0 (Gerrit change 135008; git #7036e7b6) |
| 移除版本： | 仍在使用 |
| 允许的值： | (正整数数组) |
| 默认值： | null |
| 其他设置： 按首字母排序 | 按功能排序 | |
细节
When $wgThumbnailBuckets is defined, MediaWiki will use intermediary thumbnails to speed up thumbnail rendering.
$wgThumbnailBuckets must be set to a list of thumbnail widths; whenever a new thumbnail needs to be rendered, MediaWiki will find the smallest bucket which is larger than the target width + $wgThumbnailMinimumBucketDistance but smaller than the original, and it will scale that thumbnail down to the target size instead of scaling down the original file.
This is done recursively, i.e. if the intermediary thumbnail for that bucket does not exist, it will be created from the intermediary thumbnail for the next bucket.
This will increase thumbnail generation speed considerably, especially for large images, but it will cause some loss of quality as thumbnails are now the result of several chained lossy transformations instead of just one.
File handlers have to opt into using this feature via MediaHandler::supportsBucketing().
For now only BitmapHandler supports it.