[Libreoffice-bugs] [Bug 126876] Redaction: allow transparent PNG images

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=126876

Muhammet Kara <muhammet.kara at collabora.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #4 from Muhammet Kara <muhammet.kara at collabora.com> ---
This behavior is not by design, but a result of some technical limitations in
the implementation. It can be improved, but beware that it is not a trivial
task.

Notes for the interested devs: at some point of its journey, the GDIMetaFile of
a redacted page goes through a roundtrip to and back from WMF which causes the
reported issue. To fix it, one needs to first fix the rendered GDIMetaFile, and
remove the then needed roundtrip code. Related patch is here:
https://gerrit.libreoffice.org/c/core/+/74223

(For the QA people: Although this issue starts with a particular commit, it is
not a regression. The feature was still in-development, and in an interim state
at that time.)

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