PDF incorrectly rendered
Categories
(GeckoView :: PDF Viewer, defect)
Tracking
(Not tracked)
People
(Reporter: vincent-moz, Unassigned)
Details
Attachments
(1 file)
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580.27 KB,
image/png
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Details |
Screenshot_20250524_144946_Firefox Beta.png
User Agent: Mozilla/5.0 (Android 15; Mobile; rv:139.0) Gecko/139.0 Firefox/139.0
Steps to reproduce:
Open the https://nextcloud.jdll.org/s/LLmJ2iFbrcyKPxb?dir=/&openfile=true PDF file and zoom.
Actual results:
Some parts of the PDF file are incorrectly rendered (see attached screenshot). The issue is not always reproducible.
Expected results:
The PDF file should always be rendered correctly.
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Comment 1•1 year ago
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Is this a reproducible issue with pdf.js?
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Comment 2•1 year ago
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The above URL links to a website using pdf.js as a library v4.0.189 when the current one is v5.3.31 so it should probably be updated.
Anyway, this kind of rendering issue is usually because of canvas acceleration which is disabled by default in the Fenix build-in pdf viewer but it's enabled by default (the pref doesn't exist in v4.0.189) in the lib.
In considering that I can't reproduce the bug on neither desktop (Win 11) nor on a real pixel 8 device is very unlikely a pdf.js issue but an accelerated canvas one.
:lsalzman, does something on the screenshot ring a bell for you ?
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Comment 3•1 year ago
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No idea offhand. It looks like it is using the wrong (sub)texture somehow. But we haven't tested PDFjs extensively with acceleration at the moment due to the disabling, so it could be almost anything.
Description
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