https://bugs.kde.org/show_bug.cgi?id=508250
Bug ID: 508250
Summary: (At least PNG and PDF) thumbnails are aliased in
Dolphin's preview pane
Classification: Frameworks and Libraries
Product: kio-extras
Version First 25.04.3
Reported In:
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: Thumbnails and previews
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 184077
--> https://bugs.kde.org/attachment.cgi?id=184077&action=edit
A Screenshot Of An Aliased PDF Preview In Dolphin
# SUMMARY
(At least PNG and PDF) thumbnails are aliased in Dolphin's preview pane. This
is most obvious when they are rotated (presumably, for aesthetic purposes).
# STEPS TO REPRODUCE
1. Create a directory.
2. Add a PDF and/or PNG file. Ideally, solely one of either.
3. Enable the preview pane.
4. Select the directory (using empty space).
# OBSERVED RESULT
In the preview pane, the thumbnail is aliased.
# EXPECTED RESULT
It shouldn't be. Even if the image is low-resolution, its circumference
shouldn't be aliased, especially when an analogue photorgraph-esque margin is
applied, as Dolphin (or the thumbnailer) does.
# SOFTWARE/OS VERSIONS
> ~~~
> Operating System: Fedora Linux 42
> KDE Plasma Version: 6.4.4
> KDE Frameworks Version: 6.17.0
> Qt Version: 6.9.1
> Kernel Version: 6.15.9-201.fc42.x86_64 (64-bit)
> Graphics Platform: Wayland
> Processors: 16 × AMD Ryzen 7 7840HS w/ Radeon 780M Graphics
> Memory: 32 GiB of RAM (30.6 GiB usable)
> Graphics Processor: AMD Radeon 780M Graphics
> Manufacturer: Framework
> Product Name: Laptop 16 (AMD Ryzen 7040 Series)
> System Version: A7
> ~~~
> ~~~
> sh-5.2$ rpm -qa dolphin kio-extras
> kio-extras-25.04.3-1.fc42.x86_64
> dolphin-25.04.3-1.fc42.x86_64
> ~~~
# ADDITIONAL INFORMATION
Originally discussed at
https://discuss.kde.org/t/dolphins-directory-content-thumbnails-are-aliased/38417/4?u=rokejulianlockhart.
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