MediaWiki refuses to generate thumbnail URLs for large PNGs and TIFFs with "Error creating thumbnail: File with dimensions greater than 100 MP"
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	AntiCompositeNumber
	Sep 14 2021, 9:07 PM

Description

List of steps to reproduce (step by step, including full links if applicable):

Upload or navigate to a PNG or TIFF larger than 100MP
https://commons.wikimedia.org/w/index.php?search=fileres%3A%3E10000+-filemime%3Ajpeg&title=Special:Search&profile=advanced&fulltext=1&ns0=1&ns6=1&ns12=1&ns14=1&ns100=1&ns106=1
Example: https://commons.wikimedia.org/wiki/File:Public_Roads_of_the_contiguous_United_States,_from_the_2018_TIGER_GIS_dataset.png

What happens?:
No thumbnail URLs are created. Instead, there is an error stating Error creating thumbnail: File with dimensions greater than 100 MP.

What should have happened instead?:
Thumbnail URLs should have been created. Thumbor is perfectly capable of thumbnailing these files (example) and can continue to do so.

Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc:
Likely related to recent T290759: Undeploy VipsScaler from Wikimedia wikis, as VipsScaler was only enabled for PNG and TIFF.

Related Objects

Mentioned In: T291014: Terminate all implicit use of VipsScaler code from Wikimedia production so we can remove it without breaking things this time
T290759: Undeploy VipsScaler from Wikimedia wikis
T290462: Certain TIFF files get no thumbnail and misidentified dimensions ("0 × 0 pixels") and number of pages (0 pages)
Mentioned Here: T290973: Error: Call to a member function getMimeType() on null
T290759: Undeploy VipsScaler from Wikimedia wikis

Event Timeline

AntiCompositeNumber created this task.Sep 14 2021, 9:07 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptSep 14 2021, 9:07 PM

AntiCompositeNumber added a project: Commons.Sep 14 2021, 9:15 PM

Jdforrester-WMF subscribed.Sep 14 2021, 9:38 PM

OK, back to TransformationalImageHandler::doTransform() from the other issue today T290973: Error: Call to a member function getMimeType() on null

		if ( $image->isTransformedLocally() && !$this->isImageAreaOkForThumbnaling( $image, $params ) ) {
			global $wgMaxImageArea;
			return new TransformTooBigImageAreaError( $params, $wgMaxImageArea );
		}

which calls the BitmapHandlerCheckImageArea hook, which VipsScaler was overriding.

		if ( self::getHandlerOptions( $file->getHandler(), $file, $params ) !== false ) {
			wfDebug( __METHOD__ . ": Overriding $wgMaxImageArea\n" );
			$result = true;
			return false;
		}

So definitely caused by removing VipsScaler.

Peachey88 subscribed.Sep 14 2021, 9:50 PM

AntiCompositeNumber mentioned this in T290462: Certain TIFF files get no thumbnail and misidentified dimensions ("0 × 0 pixels") and number of pages (0 pages).Sep 14 2021, 9:51 PM

Unfortunately this does break display of images in articles https://test.wikipedia.org/w/index.php?title=User:Legoktm/sandbox&oldid=480995 it's not just the file description page.

Legoktm mentioned this in T290759: Undeploy VipsScaler from Wikimedia wikis.Sep 14 2021, 9:57 PM

VipsScaler is back for now, we'll make sure this doesn't regress when removing it again.

ABreault-WMF mentioned this in T291014: Terminate all implicit use of VipsScaler code from Wikimedia production so we can remove it without breaking things this time.Jun 5 2025, 8:57 PM

MediaWiki refuses to generate thumbnail URLs for large PNGs and TIFFs with "Error creating thumbnail: File with dimensions greater than 100 MP"Closed, ResolvedPublicBUG REPORTActions

Description

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Event Timeline

MediaWiki refuses to generate thumbnail URLs for large PNGs and TIFFs with "Error creating thumbnail: File with dimensions greater than 100 MP"
Closed, ResolvedPublicBUG REPORT
Actions