[Libreoffice-bugs] [Bug 144462] New: Impress' "Automatic" font color doesn't work in PowerPoint

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=144462

            Bug ID: 144462
           Summary: Impress' "Automatic" font color doesn't work in
                    PowerPoint
           Product: LibreOffice
           Version: 7.2.0.4 release
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Impress
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: info at skierpage.com

It seems by default Impress text uses Format > Character > Font effects > Font
color: Automatic., which intelligently switches from black to white on a dark
background. For example if you Insert > Media > Photo Album and choose "Add
caption to each slide" then when you click to add a title in the
semi-transparent dark bar, the text will be white.

However, if you save the resulting presentation as .pptx and then view it in
Microsoft PowerPoint for Android, the text is always black (and thus illegible
black on gray in photo captions).

I don't know if Microsoft PowerPoint supports automatic text color. Even if it
doesn't, it's important that Impress try to do the right thing, or at least the
documentation should mention the restriction.

FWIW the ODP XML <style:text-properties> attributes for Font color: Automatic
might be
   style:use-window-font-color="true" loext:opacity="0%

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