https://bugs.kde.org/show_bug.cgi?id=440073
Bug ID: 440073
Summary: The K/L Darken/Lighten keys give very large changes
for some colours
Product: krita
Version: nightly build (please specify the git hash!)
Platform: Debian stable
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Color models
Assignee: krita-bugs-n...@kde.org
Reporter: ahab.greybe...@hotmail.co.uk
Target Milestone: ---
SUMMARY
Tested with 4.3.0, 4.5.0 and the July 19 5.0.0-prealpha (git c81ba5b)
appimages.
This was first reported by a user here:
https://krita-artists.org/t/help-shortcut-k-seems-to-be-going-outside-color-selection/26411
For high lightness with low saturation colours, the K/L keys give 'reasonable'
steps for colours that are close to red on the colour wheel.
For colours that are far from red, e.g. green, cyan, the initial K step is very
large.
There is also a notable Hue shift in these cases.
This is seen with the Advanced Colour Selector and the Specific Colour Selector
for all HSx models.
I used the default 8-bit RGBA image profile.
NOTE: Because of https://bugs.kde.org/show_bug.cgi?id=422045 , the cursor must
be positioned outside of the Advanced Color Selector when pressing the K/L keys
in order to see this as it happens.
STEPS TO REPRODUCE
1. Using the Advanced Colour Selector, select a 'pure red' Hue and then a
position on the bottom edge of the triangle close to the lower left corner. i.e
a pale pink colour.
Note: The square selector shape can be instead and any HSx model can be used.
2. Press the K key to Darken the colour.
3. Press the L key to Lighten the colour back to where it started
4. Choose a hue that is green/cyan and press the K key to Darken it.
5. Press the L key to Lighten it back to where it started.
6. Optionally choose other colours around the Hue wheel, with high Lightness
and low Saturation and do the same thing with them.
OBSERVED RESULT
2. The darkening is quite small and 'reasonable' and additional K actions give
small changes.
4. The darken step is very large and there is a significant change in the Hue
position.
6. The further away from red that an initial Hue setting is, the larger the
step and the more the Hue shift is.
EXPECTED RESULT
The K/L steps should be similar for all hues and be 'reasonable'.
SOFTWARE/OS VERSIONS
Krita
Version: 5.0.0-prealpha (git c81ba5b)
Languages: en_GB, en, en, en_GB, en
Hidpi: false
Qt
Version (compiled): 5.12.11
Version (loaded): 5.12.11
OS Information
Build ABI: x86_64-little_endian-lp64
Build CPU: x86_64
CPU: x86_64
Kernel Type: linux
Kernel Version: 4.19.0-17-amd64
Pretty Productname: Debian GNU/Linux 10 (buster)
Product Type: debian
Product Version: 10
Desktop: MATE
--
You are receiving this mail because:
You are watching all bug changes.
