Whether or not to output high-resolution images forhigh-DPI displays.

This is primarily targeted at tablet browsers and newer desktops and laptops, such as the MacBook Pro with Retina display.On these high-DPI devices, raster images appear blurry or pixelated by default without special treatment.

When generating thumbnail images, thumbnails are rendered not only at the requested size, but at 1.5x and 2x the requested size.The HTML5srcset attribute is included on theimg specifying these larger images for the appropriate display densities.

Native support for thesrcset attribute was firstadded to WebKit browsers in August 2013 and has since been adopted by most modern browsers, now (as of 2020) reaching over94% of users globally.

This code applies only to images created throughLinker:

• article thumbnails (1.21+)
• file: page detail displays (1.23+)
• image galleries (1.25+)
• the imageinfo API (1.36+)

Currently (as of 1.39) the densities used (1.5x and 2x) are hardcoded and not configurable.1x is the implied default density of the main image.

• MediaWiki configuration settings
• MediaWiki configuration settings introduced in version 1.21.0
• MediaWiki configuration settings still in use
• Thumbnail settings variables