https://bugs.kde.org/show_bug.cgi?id=474875
Bug ID: 474875
Summary: Reference images not displaying correctly on Hdr
display outputs.
Classification: Applications
Product: krita
Version: 5.1.5
Platform: Microsoft Windows
OS: Microsoft Windows
Status: REPORTED
Severity: normal
Priority: NOR
Component: Tools/Reference Images
Assignee: krita-bugs-n...@kde.org
Reporter: roger.or...@gmail.com
Target Milestone: ---
When setting the output format of Hdr display settings to Rec.2020 PQ 10-bit,
all reference images inserted into Krita documents using the reference images
tool become oversaturated and with very high contrast, this seems to be the
case whether you are working with an Hdr canvas or an Sdr one, as long as the
Hdr current output format is set to Rec.2020.
Using the Rec.709 16-bit mode provoques the opposite effect, rendering the
reference images with low contrast and desaturated. The only way to fix the
issue is setting the preferred output format back to sRGB 8-bit, which doesn't
allow you to with a Hdr canvas.
STEPS TO REPRODUCE
1. On Preferences, Configure Krita, Display, Hdr Preferences; set your
preferred output format to either Rec.2020 PQ 10-bit, or Rec.709 Linear 16-bit.
2. Restart Krita
3. Open a document containing reference images, or create a new one and insert
a reference image on it.
OBSERVED RESULT
The reference images will either be overexposed and oversaturated, or the
opposite effect, making them ineffective for referencing.
EXPECTED RESULT
The reference images should look either they way they are supposed to using
their embedded color profile when they have one, or sRGB. My suggestion is that
Krita should ask you what you want to do with the reference similar to how it
works when inserting images directly onto the canvas as layers. Asking you if
you want to see it in sRGB, the embedded color profile of the image, or in your
display profile.
SOFTWARE/OS VERSIONS
Windows 11
ADDITIONAL INFORMATION
I attached 4 screenshots showcasing the problem. The two of the top are when
the current output format is set to Rec.2020 PQ 10-bit, with an Hdr canvas and
Sdr respectively. The other two with Rec.709 Linear 16-bit. The Hdr canvas
looks overexposed in the screenshots because Windows takes them as Sdr by
default, but the canvas looks fine on my monitor, the reference images do look
like that tho. Hope I didn't miss anything, thank you in advance for paying
attention to this issue!
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