Issue about knockout groups.

[marcosps]

Hi guys!

I never saw this warning before, so I'm opening this issue:
[13:58:53.651] "Warning: TODO: Support knockout groups."
[13:58:53.651] "Warning: TODO: Support non-isolated groups."

Here is a link to the pdf with the error: http://dc230.4shared.com/download/XnQb9rEQ/LM-ED04.pdf

[SunboX]

👍 for Knockout groups support

Related PDF: http://www.zev-energie.de/PDF/schachtschein.pdf

[timvandermeij]

Another PDF testcase (from #3993): http://gondwanaland.com/i/software-eats-commons-linux-collaboration-summit-2013.pdf

[joepie91]

Not sure if this is directly relevant, but the following document is giving me Warning: Knockout groups not supported.: https://pdf.yt/d/1XdBtONLh-nGcAyv

[richerm]

PDFX-ready_Output-Test_301d_X4.pdf

Adding a really good PDF-X4 support document to show in Adobe and PDF.JS (see Page 2 - #10 - for Knockout support). I'll open another issue for overprint support.

[nicholasderk]

https://support.mozilla.org/en-US/questions/1168544#answer-988671

I've got another instance of this affecting rendering of a PDF that works in all other browsers and Acrobat Reader.

[thomasdarvik]

I get the same message "Warning: Knockout groups not supported.". Are there any internal changes lined up for the future that implements better support for knockout groups?

[marcosps]

Five years after opening the bug, I just found another example of the same warning:

https://archive.fosdem.org/2016/schedule/event/virt_iaas_ceph_rados_gateway_overview/attachments/audio/1077/export/events/attachments/virt_iaas_ceph_rados_gateway_overview/audio/1077/Fosdem_RGW.pdf

[SamyCookie]

and another one found in #3599 ticket: symbol1.pdf.

[marcosps]

Still reproducible with current Nightly flatpak.

[SandMoshi]

Can someone explain to me why the warning is there and what should be done about it?

[lovewinders]

I upgraded the pdfjs version to 2.5.207, the same problem will also occur

[marcosps]

It has been sometime since I opened the bug :)

I found a new pdf file which also shows the warning using the current flatpak version of Firefox: 91.0.1::

'Warning: Knockout groups not supported.'

http://www.cs.cornell.edu/~ragarwal/pubs/blk-switch.pdf

[philohelp]

I get this warning too. Don't have a clue about this.

[MatanYemini]

Getting it on latest chrome

[creativityjuice]

22060_A1_01_Plans-1.pdf
I also have the problem with this pdf. This issue seems to be open for almost 10 years now. Could we imagine that you'll be able to fix that at some point.

Exemple of one zone with your viewer :

And with another one that can handle knockout groups :

Thanks for your work on that project anyway.