https://bugzilla.wikimedia.org/show_bug.cgi?id=55477
Web browser: ---
Bug ID: 55477
Summary: MultimediaViewer should support hi-DPI ('Retina')
displays
Product: MediaWiki extensions
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: Unprioritized
Component: MultimediaViewer
Assignee: wikibugs-l@lists.wikimedia.org
Reporter: br...@wikimedia.org
CC: fflo...@wikimedia.org, mtrac...@member.fsf.org
Blocks: 32101
Classification: Unclassified
Mobile Platform: ---
(Jotting down some issues noted while testing, things that aren't directly
related to the commits.)
Currently the viewer doesn't have any handling for high-DPI/Retina displays --
the image loaded will be sized for 1x density only, and may appear blurry on
sharper displays.
Simplest way to handle this in near future would be something like:
* get the display density with $.devicePixelRatio() -- this will return a
number like 1, 1.5, 2, or another number depending on the display density
and/or browser zoom level. (This is a polyfill for the window.devicePixelRatio
property which adds support for IE; don't forget to include the 'jquery.hidpi'
module in your dependencies if using it.)
* multiply the target width and height by that ratio and round off to ints;
pass that pixel size into the imageinfo request when asking for a thumbnail.
* don't forget to use the _non-multiplied_ sizes in width/height attributes on
the <img>
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