https://bugs.kde.org/show_bug.cgi?id=458471
Bug ID: 458471
Summary: Locking/Unlocking layer generate an update of layer
stack
Product: krita
Version: 5.1.0
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Layer Stack
Assignee: krita-bugs-n...@kde.org
Reporter: grum...@grum.fr
Target Milestone: ---
SUMMARY
In synthesis, if filter mask/transform mask is attached to a layer, lock/unlock
action on layer and/or mask will generate an update of layer.
A more detailed an readable summary is available on krita-artists
(https://krita-artists.org/t/locking-unlocking-layer-does-it-need-to-recompute-everything/46462/8?u=grum999)
There's different case/combination where it's possible to reproduce the problem
(really not easy to write/provide clear explanation without text formatting
here :-) )
Also note on krita-artists topice, there's 2 problem (this one and another one
related to performance: problem about performance will be reported in an
another bug report)
STEPS TO REPRODUCE
Describe only the first case of 7 described on krita-artists
1. Create a new document (a large one 7000x5000 help to see better the
problem)
2. Fill paint layer
3. Add a transform mask and edit it ("mesh transform" help to see better the
problem, but problem occurs with any transform mode)
4a. Lock/Unlock paint layer and/or transform mask
4b. Alphalock/Alphaunlock paint layer
OBSERVED RESULT
Layer is updated (flickering canvas + update progress bar in status bar)
EXPECTED RESULT
Lock/Unlock shouldn't have an impact on canvas refresh
SOFTWARE/OS VERSIONS
Build ABI: x86_64-little_endian-lp64
Build CPU: x86_64
CPU: x86_64
Kernel Type: linux
Kernel Version: 4.19.0-21-amd64
Pretty Productname: Debian GNU/Linux 10 (buster)
Product Type: debian
Product Version: 10
Desktop: KDE
ADDITIONAL INFORMATION
>From python scripting
```
from krita import *
d=Krita.instance().activeDocument()
n=d.activeNode()
n.setLocked(not n.locked() )
# n.setAlphaLocked(not n.alphaLocked() )
```
We can see that update is not triggered
Problem seems to be related to action made from user interface only:
- modify value from layer stack
- from layer stack when access to layer properties [F3] and change property,
problem occurs too
Tested on Krita 4.2.8, 4.2.9, 4.3.0, 4.4.8, 5.0.6, 5.1.0, 5.2.0a
-> problem start to occurs from Krita 4.3.0
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