https://bugs.kde.org/show_bug.cgi?id=452146
Bug ID: 452146
Summary: A Copy of a transparency mask or a filter mask is
incomplete.
Product: krita
Version: nightly build (please specify the git hash!)
Platform: Debian stable
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Layer Stack
Assignee: krita-bugs-n...@kde.org
Reporter: ahab.greybe...@hotmail.co.uk
Target Milestone: ---
Created attachment 147876
--> https://bugs.kde.org/attachment.cgi?id=147876&action=edit
Tranparency and Filter Mask Copy flaw testing
SUMMARY
This is present in versions 4.4.8 onwards and is reported here for the Mar 31
5.1.0-prealpha (git 625152f808) appimage on Debian 10.
A copy of a transparency mask or a filter mask only has correct content in a
region that was painted on.
A test file, 'Test-Trans-Filter-Masks.kra', is attached for convenience of
testing.
STEPS TO REPRODUCE
1. Open the attached testing file and observe the content of Paint-1.
2. Turn on the Trans-1 transparency mask and note the painted content of two
short grey lines.
3. Duplicate Trans-1 then drag it onto Paint-2 and turn on Paint-2.
4. Delete the duplicate of Trans-1.
5. Copy Trans-1 then Paste it onto Paint-2 and observe the effect on Paint-2.
6. Save the file, Close the document, Open it
7. Delete that now working copy of Trans-1 and repeat step 5.
8. Convert the copy of Trans-1 (which is on Paint-2) to a Paint Layer then
Convert the resulting Paint Layer to a Transparency mask on Paint-2.
9. Repeat the processes of Step 2 to Step 8 but with the Filter-1 mask instead
of the Trans-1 mask.
OBSERVED RESULT
3. This works with no problems.
5. The Copy of Trans-1 is only correct within a rectangular area that
corresponds to the bounding box of the painted content, and seems to be
slightly larger that that.
It is transparent outside that area.
6. The Copy of Trans-1 has been 'fixed'.
8. The Converted paint layer is correct and the then Converted tranparency mask
is hence correct.
9. For the Filter-1 mask, similar observations will be made except that for the
Paint Layer conversion process, the filter information is lost (as expected)
and has to be specified again.
These observations are also seen for animated transparency masks and animated
filter masks and also when Copying and then Pasting into a different open
document.
EXPECTED RESULT
The Copied mask should be the same as the original, in all locations.
SOFTWARE/OS VERSIONS
Krita
Version: 5.1.0-prealpha (git 625152f)
Languages: en_GB, en, en, en_GB, en
Hidpi: false
Qt
Version (compiled): 5.12.12
Version (loaded): 5.12.12
OS Information
Build ABI: x86_64-little_endian-lp64
Build CPU: x86_64
CPU: x86_64
Kernel Type: linux
Kernel Version: 4.19.0-20-amd64
Pretty Productname: Debian GNU/Linux 10 (buster)
Product Type: debian
Product Version: 10
Desktop: MATE
OpenGL Info
Vendor: "NVIDIA Corporation"
Renderer: "GeForce GTX 750 Ti/PCIe/SSE2"
Version: "4.6.0 NVIDIA 460.73.01"
Shading language: "4.60 NVIDIA"
Requested format: QSurfaceFormat(version 2.0, options
QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize -1, redBufferSize -1,
greenBufferSize -1, blueBufferSize -1, alphaBufferSize -1, stencilBufferSize
-1, samples -1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval
1, colorSpace QSurfaceFormat::DefaultColorSpace, profile
QSurfaceFormat::NoProfile)
Current format: QSurfaceFormat(version 4.6, options
QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24,
redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0,
stencilBufferSize 0, samples -1, swapBehavior
QSurfaceFormat::DefaultSwapBehavior, swapInterval 1, colorSpace
QSurfaceFormat::DefaultColorSpace, profile
QSurfaceFormat::CompatibilityProfile)
Version: 4.6
Supports deprecated functions true
is OpenGL ES: false
supportsBufferMapping: true
supportsBufferInvalidation: true
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