https://bugs.kde.org/show_bug.cgi?id=459517
Bug ID: 459517
Summary: [master] Performance when working under filter layers
is significantly worse (likely due to layer thumbnail
generation)
Classification: Applications
Product: krita
Version: nightly build (please specify the git hash!)
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Filter Layers
Assignee: krita-bugs-n...@kde.org
Reporter: tomtomtomreportin...@gmail.com
Target Milestone: ---
git 890a755
SUMMARY
Filter layer performance is noticeably worse in master, likely due to the
thumbnail generation changes.
In 5.1.1, filter layer thumbnails seem to match the canvas, meaning no
significant bounds calculation is necessary. In master, filter layer thumbnails
match the group, meaning lag doesn't occur if the group includes a background
layer.
STEPS TO REPRODUCE
1. Create a new document.
2. Group paint layer 1.
3. Add a Desaturation filter layer to the group.
4. Paint a stroke.
5. Wait half a second.
6. Paint another stroke.
OBSERVED RESULT
The stroke in step 6 had a delay due to the filter layer thumbnail being
generated.
EXPECTED RESULT
No noticeable choppiness.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Debian sid
KDE Plasma Version: 5.25.5
KDE Frameworks Version: 5.98.0
Qt Version: 5.12.12 (appimage)
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