https://bugs.kde.org/show_bug.cgi?id=435188

            Bug ID: 435188
           Summary: Face tag icons not automatically generated, lots of
                    QPixmap::scaled: Pixmap is a null pixmap errors on
                    console
           Product: digikam
           Version: 7.2.0
          Platform: Compiled Sources
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Tags-Manager
          Assignee: digikam-bugs-n...@kde.org
          Reporter: ges...@blackrosetech.com
  Target Milestone: ---

SUMMARY



STEPS TO REPRODUCE
1. Tag faces
2. Hope to see a pretty face tag icon to "make the face workflow more visual" 😊


OBSERVED RESULT

Workflow not more visual. 😢

long strings of errors thrown to console like:

QPixmap::scaled: Pixmap is a null pixmap
QPixmap::scaled: Pixmap is a null pixmap
QPixmap::scaled: Pixmap is a null pixmap
QPixmap::scaled: Pixmap is a null pixmap

I can't find anything related to this error for digikam and the places where
people have noted it were related to KDE plasma icons generally.  Qpixmap is
used in so, so many places in the code it is hard for someone as unfamiliar as
myself to narrow it down much.

EXPECTED RESULT

Pleasingly visual workflow. :-)
no errors thrown.

Mostly likely a stupid user configuration error; any clue appreciated.

SOFTWARE/OS VERSIONS 
Linux/KDE Plasma: 20.04.2 LTS (Focal Fossa) 5.8.0-48-generic 
(available in About System)
KDE Plasma Version: plasmashell 5.18.5
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8

mariadb  Ver 15.1 Distrib 10.3.25-MariaDB, for debian-linux-gnu (x86_64) using
readline 5.2


ADDITIONAL INFORMATION
digikam version 7.2.0
CPU cores: 8
Eigen: 3.3.7
Exiv2: 0.27.3
Exiv2 supports Base Media: No
Exiv2 supports XMP metadata: Yes
HEIF encoding support: Yes
ImageMagick codecs: 6.9.10
KF5: 5.68.0
LensFun: 0.3.2-0
LibCImg: 130
LibJPEG: 80
LibJasper: 2.0.27
LibLCMS: 2090
LibLqr support: Yes
LibPGF: 7.19.03
LibPNG: 1.6.37
LibRaw: 0.21.0
LibTIFF: 4.1.0
Marble: 0.27.20
Parallelized demosaicing: Yes
Qt: 5.12.8
Qt WebEngine support: Yes
Rajce support: Yes
VKontakte support: No
AkonadiContact support: No
Baloo support: Yes
Calendar support: Yes
DBus support: Yes
Database backend: QMYSQL
Database internal server: No
HTML Gallery support: Yes
LibAVCodec: 58.91.100
LibAVFormat: 58.45.100
LibAVUtil: 56.51.100
LibGphoto2: 2.5.25
LibOpenCV: 4.2.0
LibQtAV: 1.13.0
Media player support: Yes
Panorama support: Yes

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