https://bugs.kde.org/show_bug.cgi?id=427658
Bug ID: 427658
Summary: Weird interaction between Polygonal Selection Tool and
Assistant Previews
Product: krita
Version: 4.4.0
Platform: Appimage
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Tool/Assistants
Assignee: krita-bugs-n...@kde.org
Reporter: aut...@autumnlansing.com
Target Milestone: ---
SUMMARY
Using the Polygonal Selection Tool while Assistant Previews are visible
produces odd artifacts on screen wherever the tool's lines intersect with the
preview lines. The preview lines are basically erased and redrawn elsewhere
along the tool's line, multiple times if you stop the pointer and move it
again. This happens on every side of the polygon until you complete the shape,
and then all the artifacts vanish and everything is back to normal. This
happens with mouse or tablet pen.
I tried to get a screenshot of the problem but it didn't appear. The screenshot
showed everything normally. Also, if I pull up another program window in front
of Krita (alt-tab to something else) while the artifacts are present and then
switch back again to Krita, the artifacts will be gone.
This behavior is new to 4.4.
STEPS TO REPRODUCE
1. Ensure that Assistant Previews are visible.
2. Create either a Concentric Ellipse or a Parallel Ruler, or both.
3. Use the polygon selection tool and create a selection across preview lines.
OBSERVED RESULT
Preview lines are disrupted and produce odd artifacts on screen.
EXPECTED RESULT
No interaction between preview lines and selection tool.
SOFTWARE/OS VERSIONS
Krita
Version: 4.4.0
Languages: en_US, en
Hidpi: true
Qt
Version (compiled): 5.12.9
Version (loaded): 5.12.9
OS Information
Build ABI: x86_64-little_endian-lp64
Build CPU: x86_64
CPU: x86_64
Kernel Type: linux
Kernel Version: 5.7.15-100.fc31.x86_64
Pretty Productname: Fedora 31 (MATE-Compiz)
Product Type: fedora
Product Version: 31
Desktop: X-Cinnamon
OpenGL Info
Vendor: "NVIDIA Corporation"
Renderer: "GeForce GTX 660/PCIe/SSE2"
Version: "4.6.0 NVIDIA 450.66"
Shading language: "4.60 NVIDIA"
Requested format: QSurfaceFormat(version 3.0, options
QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24,
redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8,
stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer,
swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile
QSurfaceFormat::CompatibilityProfile)
Current format: QSurfaceFormat(version 4.6, options
QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24,
redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8,
stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer,
swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile
QSurfaceFormat::CompatibilityProfile)
Version: 4.6
Supports deprecated functions true
is OpenGL ES: false
QPA OpenGL Detection Info
supportsDesktopGL: true
supportsOpenGLES: true
isQtPreferOpenGLES: false
Hardware Information
GPU Acceleration: auto
Memory: 16001 Mb
Number of Cores: 6
Swap Location: /tmp
Current Settings
Current Swap Location: /tmp
Current Swap Location writable: true
Undo Enabled: true
Undo Stack Limit: 30
Use OpenGL: true
Use OpenGL Texture Buffer: true
Use AMD Vectorization Workaround: false
Canvas State: OPENGL_SUCCESS
Autosave Interval: 300
Use Backup Files: true
Number of Backups Kept: 1
Backup File Suffix: ~
Backup Location: Same Folder as the File
Backup Location writable: false
Use Win8 Pointer Input: false
Use RightMiddleTabletButton Workaround: false
Levels of Detail Enabled: false
Use Zip64: false
Display Information
Number of screens: 2
Screen: 0
Name: HDMI-0
Depth: 24
Scale: 1
Resolution in pixels: 1920x1080
Manufacturer: LG Electronics
Model: LG IPS FULLHD
Refresh Rate: 60
Screen: 1
Name: DVI-D-0
Depth: 24
Scale: 1
Resolution in pixels: 1920x1080
Manufacturer: HPN
Model: HP VH240a-
Refresh Rate: 60
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