https://bugs.kde.org/show_bug.cgi?id=499696
Bug ID: 499696
Summary: Half-pixel aligned mirror tool sometimes broken
Classification: Applications
Product: krita
Version: 5.2.9
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Tools
Assignee: krita-bugs-n...@kde.org
Reporter: ricardojorge512+...@hotmail.com
Target Milestone: ---
SUMMARY
Pixel lines are not correctly mirrored with half-pixel aligned mirroring tool.
STEPS TO REPRODUCE
1. Create an odd-sized small image (ex: 7x7)
2. Select a pixel drawing brush
3. Zoom in and place the cursor on the left side of the mirroring tool
4. Click on the left half of a pixel
OBSERVED RESULT
Only the pixel under the cursor is painted.
EXPECTED RESULT
Another pixel should have appeared, mirrored on the right side.
SOFTWARE/OS VERSIONS
Linux: Gentoo
Krita: AppImage 5.2.9 (git ac6cae8)
ADDITIONAL INFORMATION
Also, the line tool is broken. I suspect there is some shenanigans regarding
rounding up or rounding down when converting the mouse position (which is
sub-pixel aligned), into the pixel index to actually paint, but can't be sure.
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