Bug 473802 - JPG, WEBP, PNG, JXL Gwenview Decoders Are Broken (unlike other apps)
Summary: JPG, WEBP, PNG, JXL Gwenview Decoders Are Broken (unlike other apps)
Status: RESOLVED WORKSFORME
Alias: None
Product: gwenview
Classification: Applications
Component: general (other bugs)
Version First Reported In: 23.04.3
Platform: Arch Linux Linux
: NOR major
Target Milestone: ---
Assignee: Gwenview Bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-08-27 12:17 UTC by John
Modified: 2025-09-20 03:48 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:


Attachments
gwenview can't display it properly (you should see logo, there's no logo in gwenview) (19.80 KB, image/jpeg)
2023-08-27 12:17 UTC, John
Details
gwenview can't display it properly (you should see logo, there's no logo in gwenview) (47.28 KB, image/png)
2023-08-27 12:18 UTC, John
Details
gwenview can't display it properly (you should see logo, there's no logo in gwenview) (10.34 KB, image/jxl)
2023-08-27 12:18 UTC, John
Details
gwenview can't display it properly (you should see logo, there's no logo in gwenview) (10.91 KB, image/webp)
2023-08-27 12:19 UTC, John
Details

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Description John 2023-08-27 12:17:47 UTC
Created attachment 161211 [details]
gwenview can't display it properly (you should see logo, there's no logo in gwenview)

SUMMARY
***
Gwenview should be the master of displaying photos. Unfortunately its decoders are broken, hence its not suitable for browsing displaying photos. I have 4 photos encoded in the following formats: png, jpg, jxl, webp. Gwenview cannot display them properly. I consider it SEVERE. If Gwenview that is a photo browser can't display photos (png, jpg, jxl, webp) and you consider its not severe, then I don't know what a SEVERE is.

Status Quo:
All photos (jpg, jxl, png, webp) are displayed properly in other photo viewers (from examplein software from suckless or imagemagic "$ display", graphicsmagic "$ gm display"). All photos are the same picture with a fainted logo on a red background. Can you see logo in Gwenview? No. Just the red rectangular. Nobody sees what is on photo while using gwenview. That's not the photo. That's just a red rectangular. Verdict: Gwenview fail.

Should be:
Gwwenview should dislpay those photos correctly. Just display them.

STEPS TO REPRODUCE:
1. Open attached photos (png, jpg, jxl, webp) in imagemagic ($ display *.jpg, $ display *.png and so on)
2.  Open them in gwenview
3.  Compare. Not the photo. Just red rectangular in Gwewnview.

SOFTWARE/OS VERSIONS:
Operating System: Arch (not Manjaro)
KDE Plasma Version: 5.27.7
KDE Frameworks Version: 5.109.0
Qt Version: 5.15.10
Intel only
X11
Comment 1 John 2023-08-27 12:18:25 UTC
Created attachment 161212 [details]
gwenview can't display it properly (you should see logo, there's no logo in gwenview)
Comment 2 John 2023-08-27 12:18:46 UTC
Created attachment 161213 [details]
gwenview can't display it properly (you should see logo, there's no logo in gwenview)
Comment 3 John 2023-08-27 12:19:02 UTC
Created attachment 161214 [details]
gwenview can't display it properly (you should see logo, there's no logo in gwenview)
Comment 4 John 2023-08-27 12:27:35 UTC
Affected are also Digikam/Showphoto. :(
Comment 5 John 2023-08-27 12:34:49 UTC
Also affected are:
Digikam/Showphoto

Open Showphoto, then got to "Help" --> "About Showphoto" and read the following on the first tab ("About")
"Professional Photo Management with the Power of Open Source - A KDE Family Project". Professional Grade, really? Can't display jpg, png, jxl and webp. "Professional Grade" MA.
Comment 6 Maik Qualmann 2023-08-27 17:59:21 UTC
I speak for digiKam now. I also don't see a logo when I open the images with Gimp and leave the color profile on sRGB. If you deactivate the color management in digiKam with F12 as a test, you will see the logo in all images (recreat the thumbnails with F5). So set a monitor profile that covers the color space.

Maik
Comment 7 John 2023-08-30 13:33:42 UTC
(In reply to Maik Qualmann from comment #6)
> I speak for digiKam now. I also don't see a logo when I open the images with
> Gimp and leave the color profile on sRGB. If you deactivate the color
> management in digiKam with F12 as a test, you will see the logo in all
> images (recreat the thumbnails with F5). So set a monitor profile that
> covers the color space.
> 
> Maik

You did not understood the bug.
Comment 8 Maik Qualmann 2023-08-30 14:40:05 UTC
You know that your images have an embedded color profile?

Maik
Comment 9 A Linux User 2025-08-21 20:00:53 UTC
Thank you for the bug report. Unfortunately we were not able to get to it yet. Can we ask you to please check if this is still an issue with Gwenview 25.08?
Comment 10 Bug Janitor Service 2025-09-05 03:48:14 UTC
๐Ÿ›๐Ÿงน โš ๏ธ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!
Comment 11 Bug Janitor Service 2025-09-20 03:48:10 UTC
๐Ÿ›๐Ÿงน This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.