Manual:$wgMaxInterlacingAreas

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ImageMagick: $wgMaxInterlacingAreas
Array of max pixel areas for interlacing per MIME type.
Introduced in version:1.27.4 (Gerrit change 264048; git #695a93dd)
Removed in version:still in use
Allowed values:(array)
Default value:[]

Description

Used to enable interlacing for a given MIME type, up to a given pixel limit (interlacing is relatively expensive).

For basic information on what interlacing is, see http://pooyak.com/p/progjpeg/.

Currently supported MIME types in core: image/jpeg, image/png, image/gif. Interlacing will be done via ImageMagick, or for jpeg/png via VIPS if Extension:VipsScaler is enabled.