https://bugs.kde.org/show_bug.cgi?id=476776
Bug ID: 476776
Summary: Performance drop with In-stack preview for Transform
Tool
Classification: Applications
Product: krita
Version: 5.2.1
Platform: Microsoft Windows
OS: Microsoft Windows
Status: REPORTED
Severity: normal
Priority: NOR
Component: Tools/Transform
Assignee: krita-bugs-n...@kde.org
Reporter: dorijan.sa...@gmail.com
Target Milestone: ---
SUMMARY
Performance for Free Transform moving/transforming drops after transforming
selected layer. Creating new layer or deleting any layer in the stack will
reset performance back up to max for previously transformed layer.
STEPS TO REPRODUCE
With In-stack preview mode for transform tool (with or without instant
preview):
1. Create new document or open any image, something larger (I've tested on A4
300ppi size or larger), not as noticeable on small sizes
2. Fill layer with something - fill entire layer with color/bucket, add
rectangle, circle or whatever (again make it larger, not small circle/rectangle
in center) or select existing image on layer in case of opening image
3. Select layer with Free Transform tool and attempt to move it around,
performance will be fine at first, then resize, rotate or something (don't
resize too small or it won't be noticeable as much) and apply transform.
4. Attempt to move it around again and performance will be much lower; slow
movement, slow resizing, rotating etc.
5. Create a new layer or delete another existing layer (keep the one we're
testing at)
6. Switch back to the layer that was transformed and had low performance, now
the performance will be back to normal
Can be reproduced 100% of the time with same result.
OBSERVED RESULT
Performance drops after transforming selected layer then goes back to normal
when adding/removing another layer from the stack.
EXPECTED RESULT
No performance drops after transforming a layer.
SOFTWARE/OS VERSIONS
Windows: Windows 10 Pro
Qt Version: 5.15.7
Krita Version: 5.2.1
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