[Poppler-bugs] [Bug 107584] Font disregarded in Freetext annotation with default appearance (DA) but without appearance stream (AP)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107584

--- Comment #8 from oliver.sander at tu-dresden.de ---
Here is some initial explanation of why moving the annotation in Okular causes
a crash:  After the move, Okular calls the method TextAnnotation::setTextFont
with the argument

  QFont( "Noto Sans,12,-1,0,50,0,0,0,0,0,Regular" )

Then, the method TextAnnotationPrivate::toAppearanceString is called to get an
appearance string from that.  However, the method is only a stub:

GooString * TextAnnotationPrivate::toAppearanceString(const QFont &font)
{
    GooString * s = GooString::format("/Invalid_font {0:d} Tf",
font.pointSize());
    // TODO: Font family, style (bold, italic, ...) and pointSize as float
    return s;
}

The actual crash then results because the font tag 'Invalid_font' cannot be
found in the font resource dictionary.

I'll modify the patch to not crash when the font tag cannot be found.  However,
there are still a few things I don't understand, namely a) why is setTextFont
only called after the annotation has been moved, but not before, b) How do we
get the /Impact tag from that particular QFont object?

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