PDF.js: Difference between revisions

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Revision as of 09:00, 24 May 2022

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'''PDF.js''' or '''pdf.js''' is a [[JavaScript library]] that renders [[Portable Document Format]] (PDF) files using the [[web standard]]s-compliant [[HTML5 Canvas]]. The project is led by the [[Mozilla Corporation]] after [[Andreas Gal]] launched it (initially as an experiment) in 2011.

== History and application ==

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==Behavior==

According to onea benchmark by [[Mozilla]], PDF.js is performant for viewing most common PDF files, while it may have some issues with large or 'graphics-heavy' documents.<ref>{{Cite web|url=https://hacks.mozilla.org/2014/05/how-fast-is-pdf-js/|title=How fast is PDF.js? – Mozilla Hacks - the Web developer blog}}</ref>

PDF.js supports most of the PDF specifications (including form support or [[XFA]]<ref>{{Cite web|title=1706133 - (pdf-xfa) [meta] XFA support|url=https://bugzilla.mozilla.org/show_bug.cgi?id=1706133|access-date=2022-01-28|website=bugzilla.mozilla.org|language=en}}</ref>) , but some features have not been implemented yet, which may impact rendering behavior depending on the features the document uses.<ref>{{Cite web|title=Guide to Evaluating PDF.js Rendering|url=https://pdftron.com/blog/pdf-js/guide-to-pdf-js-rendering/|access-date=2021-08-05|website=PDFTron}}</ref>

Several [[PDF/X]] or optional PDF features notthat yetare addednot tosupported in PDF.js or incompleteinclude:

*Optional Content Groups (OCGs)

* [[ICC color profiles|ICC Color Profiles]]<ref>{{Cite web |title=ICC profiles support for images · Issue #2856 · mozilla/pdf.js |url=https://github.com/mozilla/pdf.js/issues/2856 |access-date=2022-05-24 |website=GitHub |language=en}}</ref>

*ICC Color Profiles

* Spot colors

*Overprint simulation<ref>{{Cite web |title=Overprint Support · Issue #7360 · mozilla/pdf.js |url=https://github.com/mozilla/pdf.js/issues/7360 |access-date=2022-05-24 |website=GitHub |language=en}}</ref>

*Overprint simulation

*Transparency groups (knockout/isolation)<ref>{{Cite web |title=Issue about knockout groups. · Issue #3136 · mozilla/pdf.js |url=https://github.com/mozilla/pdf.js/issues/3136 |access-date=2022-05-24 |website=GitHub |language=en}}</ref>

*Transparency groups (knockout/isolation)

*Some patterns & shadings

*High-fidelity printing