[okular] [Bug 383651] Custom/image stamp annotations are not saved into the PDF file in a way that can be printed or that other readers can see

[Tobias Deiminger]

https://bugs.kde.org/show_bug.cgi?id=383651

--- Comment #27 from Tobias Deiminger <haxtibal at posteo.de> ---
(In reply to Valentin Melot from comment #26)
> Hello, is there some news about this bug? It is still happening in version
> 1.6.3. Thanks in advance!
Afaikt there's no news, sorry.

@Nate, Kevin: You seem to focus on default appearances. I don't think they
would fix this bug, can you explain how?

For my understanding we need to extend poppler so that it can generate and save
appearance streams into the PDF file in a consistent way:
- either generate PDF operations from user image to draw image as paths
- or rasterize / convert user image to a sampled PDF image
- create AP structure, enter the generated image stream, enter additional
resources
- update all resource references throughout the document
- save new and dirty objects

That all has not much to do with default appearances. Even if poppler had hard
coded default appearances for stamps, non-Okular readers would not benefit from
them unless the appearance is saved into the file, which is currently not
possible and which is the toughest part to implement. And, "default" is quite
the opposite to "custom" (as in the bug title).

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