[MediaWiki-l] Image thumbnailing in MediaWiki

Robert Vogel vogel at hallowelt.com
Mon Jul 31 06:33:26 UTC 2017


Hi Bernhard,


I believe bawolff's explanations to use the "thumb.php" (plus the 404 handler) as an entrypoint is probably the best approach. If you still need for some reason those files to be always available on the disk, it should be easy to write a maintenance script that runs over all the files in your repo and creates the desired thumb sizes. It can be done with MediaWiki framework functions (`wfFindFile($title)->createThumb( $width, $height )`). This could also be done within the "UploadComplete" [1] hook.


[1] https://www.mediawiki.org/wiki/Manual:Hooks/UploadComplete


--

Robert


________________________________
Von: MediaWiki-l <mediawiki-l-bounces at lists.wikimedia.org> im Auftrag von Krabina Bernhard <krabina at kdz.or.at>
Gesendet: Freitag, 28. Juli 2017 11:18
An: mediawiki-l at lists.wikimedia.org
Betreff: [MediaWiki-l] Image thumbnailing in MediaWiki

Dear MediaWiki experts,

I cannot really figure out the behaviour of MediaWiki regarding thumbnailing. What I want to achieve is that my MediaWiki installation produces thumbnails in a specified size.

What I did after reading through several help pages is this:
---------------------------
# Images und Thumbnails
$wgThumbLimits = array( 80, 250, 390 );
$wgDefaultUserOptions['thumbsize'] = 1; // thumb size 250

$wgImageLimits = array( array( 80, 90 ), array( 800, 600 ), array( 1280, 1024 ) );
$wgDefaultUserOptions['imagesize'] = 2; // image size 800, 600
---------------------------

In my opinion this should guarantee that for every image uploaded, there is an 80, 250 and 390px sized thumbnail. In many cases this is true, but there are some cases were I can find a 100px thumbnail, but no 80px thumbnail.

If I understand it correctly, this can perfectly be the case if any user sets his/her preference to 100px. I don't mind so much extra sizes to be produced, but I want to make sure that a 80px thumbnail is there.

Maybe in the cases where it is not present the images were uploaded before the above mentioned setting was made? But how can I get the wiki to redo thumbnails in my desired size?

cheers,
Bernhard

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