PNG image shown as black box (Writer/Calc)

standan · January 9, 2020, 11:58am

For some reason inserting a PNG image with no alpha channel results in a black box. This happens in Libreoffice for mac and for Linux, however is working in Windows. (Writer and Calc)

Image:

image description

Problem:

Strangely, this does not seem to be the case for Libreoffice Impress / Powerpoint files. Any idea what might be going wrong?

Attachments:

Sample Spreadsheet.ods

qrcode.png

sample_document.odt

Edit:
Libreoffice Info:

Edit 2:
FYI: I did try with enabling and disabling the “Use OpenGL for all rendering” option.

I also see that converting the color mode to greyscale or black/white does render this image properly.

Furthermore, the preview when opening Libreoffice shows the correct image for Writer but not for Spreadsheet:

anon73440385 · January 9, 2020, 12:25pm

Can’t confirm for my Libreoffice version 6.2.8.2 on Linux openSUSE Leap 15.1. Both attachments show the QR code.

mikekaganski · January 11, 2020, 12:37pm

This could be a system-dependent bug. Please file it to bug tracker. Thanks!

Hrbrgr · January 9, 2020, 12:32pm

LibreOffice comes with OpenGL rendering enabled by default and this configuration might cause problems with certain combinations of graphics hardware and their drivers,…

Please check and see:

OpenGL

In LibreOffice in the Tools>Options>View menu, switch off OpenGL if there is a graphic output.

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Edits from the comments:

EDIT_1: Did you restart LibreOffice afterwards?

EDIT_2: My suggestion: Try to convert the PNG into a JPG or click on the image in LibreOffice and choose save. Insert and test the new images again.

EDIT_3: You can try to reset your user profile.
Save the existing user profile beforehand.

standan · January 9, 2020, 12:57pm

I tried with both enabling and disabling (restarting on each change) “Use OpenGl for all rendering”, but the result is the same.
Am I missing something?

Hrbrgr · January 9, 2020, 1:37pm

Did you restart LibreOffice afterwards?

standan · January 9, 2020, 1:56pm

yep, even restarted my mac to be sure.

Hrbrgr · January 9, 2020, 4:48pm

My suggestion: Try to convert the PNG into a JPG or click on the image in LibreOffice and choose save.
Insert and test the new images again.

standan · January 10, 2020, 12:46pm

I do have a workaround for it. The image is being generated by a library and inserted into document programmatically and exported to PDF. Not sure if i should file a bug report.

Hrbrgr · January 11, 2020, 8:38am

You can try to reset your user profile.
Save the existing user profile beforehand.