https://bugzilla.wikimedia.org/show_bug.cgi?id=16785
Summary: Switch in bicubic image scaling for client-side
thumbnailing in Internet Explorer
Product: MediaWiki
Version: unspecified
Platform: All
URL: http://code.flickr.com/blog/2008/11/12/on-ui-quality-
the-little-things-client-side-image-resizing/
OS/Version: All
Status: NEW
Severity: enhancement
Priority: Normal
Component: Images
AssignedTo: [email protected]
ReportedBy: [email protected]
Blocks: 640
Created an attachment (id=5620)
--> (https://bugzilla.wikimedia.org/attachment.cgi?id=5620)
Screen shot IE7 with full-page zoom showing ugly pixels
In some circumstances, raster images can get scaled up or down on the client
side:
* Small source image scaled up to a large size [[Image:Tiny.png|300px]]
* GIF image over $wgMaxAnimatedGifArea
* Any image scaled on server with no GD or ImageMagick scaling engine available
* Any image when browser's full-page zoom is used
Many modern browsers use a pretty scaling method, but by default Internet
Explorer uses nearest-neighbor which looks awful.
Apparently, IE 7 can switch in bicubic scaling via a simple bit of custom CSS:
http://code.flickr.com/blog/2008/11/12/on-ui-quality-the-little-things-client-side-image-resizing/
If there aren't unpleasant side effects it may be wise to use this.
IE 6 can perhaps do this with the scary filter we're using for Alpha PNGs or a
variant, but it's probably not worth expending effort on IE 6 at this point.
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