https://bugs.kde.org/show_bug.cgi?id=429790
Bug ID: 429790
Summary: Brush outline renders in a discrete "snapped" manner
Product: krita
Version: 4.4.1
Platform: Debian unstable
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: General
Assignee: krita-bugs-n...@kde.org
Reporter: nmaghfurus...@gmail.com
Target Milestone: ---
SUMMARY
Appears similar to https://krita-artists.org/t/brush-is-lagging-glitching/14895
but I'm unsure if it's the same bug.
My bug seems to only be reproducible with the following very specific steps and
conditions, so it's easy to avoid this bug. These instructions assume you have
a clean default krita installation.
STEPS TO REPRODUCE
1. Start Krita
2. Press Ctrl+N for a new document, any document size will do.
3. Press "1" to set zoom to 100% of the current document
4. Move your cursor around and observe where/how the brush outline renders
5. Press Ctrl+N for a new document again. This time make it significantly
larger than the viewport's size (eg A3 300ppi, maybe A3 600ppi if you have an
outlandishly large monitor)
6. Ctrl+Tab to switch back to the previous document
7. Move your cursor around and observe where/how the brush outline renders
OBSERVED RESULT
The brush outline gets rendered only at discrete locations aligned with some
unknown invisible grid, as if Snap to Grid was enabled for the brush outline.
EXPECTED RESULT
Brush outline should render as smoothly as in step 3.
WORKAROUND
Ctrl+Drag to change the zoom of the current document, even by a couple percent.
This will fix the way the brush outline renders and the expected result is
observed.
If you Ctrl+Tab to the big document, then Ctrl+Tab again to the first document,
the incorrect result is again observed.
SOFTWARE/OS VERSIONS
Krita
Version: 4.4.1
Languages: id_ID, id
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: 5.8.0-2-amd64
Pretty Productname: Debian GNU/Linux bullseye/sid
Product Type: debian
Product Version: unknown
Desktop: GNOME-Classic:GNOME
OpenGL Info
Vendor: "Intel Open Source Technology Center"
Renderer: "Mesa DRI Intel(R) HD Graphics 4600 (HSW GT2)"
Version: "3.0 Mesa 20.1.9"
Shading language: "1.30"
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 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::NoProfile)
Version: 3.0
Supports deprecated functions true
is OpenGL ES: false
QPA OpenGL Detection Info
supportsDesktopGL: true
supportsOpenGLES: true
isQtPreferOpenGLES: false
Hardware Information
GPU Acceleration: auto
Memory: 7843 Mb
Number of Cores: 8
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: 900
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: 1
Screen: 0
Name: eDP-1
Depth: 24
Scale: 1
Resolution in pixels: 1920x1080
Manufacturer:
Model:
Refresh Rate: 59
ADDITIONAL INFORMATION
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