Manual:$wgTiffThumbnailType

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Thumbnail settings: $wgTiffThumbnailType
The format and MIME type to convert TIFF images to.
Introduced in version: 1.15.0 (r48462)
Removed in version: still in use
Allowed values: Array with 2 entries
Default value: false
Other settings: Alphabetical | By function

Details[edit]

Array of file extension and MIME type to convert TIFF images to when sending them for inline display in web pages. By default, this is false, meaning this conversion does not occur.

Browsers don't support TIFF inline generally, so images need to be converted to an alternate format. Note scaling should work with ImageMagick, but may not with GD scaling.

Examples[edit]

// PNG is lossless, but inefficient for photos
$wgTiffThumbnailType = array( 'png', 'image/png' );

// JPEG is good for photos, but has no transparency support. Bad for diagrams.
$wgTiffThumbnailType = array( 'jpg', 'image/jpeg' );