https://bugs.kde.org/show_bug.cgi?id=407238
Bug ID: 407238
Summary: 100% transparency in SDR images look like white on HDR
images
Product: krita
Version: nightly build (please specify the git hash!)
Platform: MS Windows
OS: MS Windows
Status: REPORTED
Severity: normal
Priority: NOR
Component: HDR
Assignee: krita-bugs-n...@kde.org
Reporter: tamtamy.tym...@gmail.com
Target Milestone: ---
Created attachment 119851
--> https://bugs.kde.org/attachment.cgi?id=119851&action=edit
Krita file that shows the problem
SUMMARY
100% Opacity in SDR sRGB 8bit ineger images look like white on HDR images.
Semi-transparent pixels have visible checkerboard, but fully transparent pixels
are fully white.
STEPS TO REPRODUCE
1. Make a new image sRGB 8bit/integer, sRGB built-in.
2. Erase part of the background if you have it (and for your eyes' sake, better
have one). (Make sure the canvas background color is transparent).
3. Paint with semi-transparent black.
OBSERVED RESULT
Transaparent pixels look white (the very bright, HDR version of white).
Semi-transparent pixels have visible checkerboard.
EXPECTED RESULT
Transparent pixels have visible checkerboard, too, and don't have any
HDR-looking colors.
SOFTWARE/OS VERSIONS
Krita version: 4.2.0-pre-alpha (git fb08951)
Windows: 10
Qt Version: 5.12.2
GPU Acceleration: auto
Memory: 16191 Mb
Number of Cores: 12
Swap Location: C:/Users/Agata/AppData/Local/Temp
Vendor: "Google Inc."
Renderer: "ANGLE (Intel(R) UHD Graphics 630 Direct3D11 vs_5_0 ps_5_0)"
Version: "OpenGL ES 3.0 (ANGLE 2.1.0.57ea533f79a7)"
Shading language: "OpenGL ES GLSL ES 3.00 (ANGLE 2.1.0.57ea533f79a7)"
Requested format: QSurfaceFormat(version 3.0, options
QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24,
redBufferSize 10, greenBufferSize 10, blueBufferSize 10, alphaBufferSize 2,
stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer,
swapInterval 0, colorSpace QSurfaceFormat::bt2020PQColorSpace, profile
QSurfaceFormat::CompatibilityProfile)
Current format: QSurfaceFormat(version 3.0, options
QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize 10,
greenBufferSize 10, blueBufferSize 10, alphaBufferSize 2, stencilBufferSize 8,
samples 0, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0,
colorSpace QSurfaceFormat::bt2020PQColorSpace, profile
QSurfaceFormat::NoProfile)
Version: 3.0
Supports deprecated functions false
is OpenGL ES: true
QPA OpenGL Detection Info
supportsDesktopGL: true
supportsAngleD3D11: true
isQtPreferAngle: true
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