Warning when dragging screen to browser/file manager/picture viewer...

[PrivacyDragon]

What's wrong, and with what software version?

Operating System: Linux, OpenSuse Leap 15.1
CEmu version: 1.3
Issue:
When I drag the screen into my browser, file manager or picture viewer, I get a big warning in the terminal.
It's like three lines of six times "WARNING!!!"
The browser I use is: Firefox
The file manager I use is: Dolphin
The picture viewer I use is: Gwenview

What are the steps to reproduce this issue?

1. Open CEmu (Of course...)
2. Open a Browser or filemanager or picture viewer.
3. Go back to CEmu.
4. Drag the screen.
5. Open it on a new browser tabblad, copy it to somewhere via the file manager or drop it in the picture viewer.
6. Look in the terminal and you'll see a warning.

Any logs, error output, screenshot, other comments...?

[adriweb]

Maybe @Vogtinator can help with that one?

[Vogtinator]

That's from here: https://github.com/qt/qtimageformats/blob/024527e1fa36fbe5f25e0e438d43d11cd15d68de/src/plugins/imageformats/jp2/qjp2handler.cpp#L860

So something tries to write a JPEG2000 file?

[adriweb]

Not as far as I know, hmmm.
CEmu captures are either standard PNG (

CEmu/gui/qt/lcdwidget.cpp

Line 105 in 8e31441

void LCDWidget::mouseMoveEvent(QMouseEvent *e) {

wher we use Qt stuff), or animated PNGs (in which case, we use libpng-apng anyway)

[Vogtinator]

I guess the format negotiation for the drag and drop somehow results with image/jpeg2000 getting selected. In Leap 15.2 and up, the jpeg2000 support was dropped from libqt5-qtimageformats, so I can't reproduce it here.

[adriweb]

Interesting, I guess we can force PNG and see how it goes.

[PrivacyDragon]

Well, OpenSuse Leap 15.1 won't be supported in a certain amount of time or something like that (According to my father), so I have to update to Leap 15.2 somewhere in the next months... (well, my father will do that, but that doesn't really matter)

[Vogtinator]

Getting a backtrace at the jas_stream_memopen call should show why exactly it's being called.

[adriweb]

May have been fixed along the years.
Also 1ce65e8 may help too...

To re-open if needed.