https://bugs.kde.org/show_bug.cgi?id=482780
--- Comment #14 from Dāvis <davis...@gmail.com> --- > (In reply to Dāvis from comment #1) > > Also for me that SDR Color Intensity slider doesn't work at all, it does > > nothing - no visual change between 0% and 100%. > That's bug 482809 > Unfortunately it's not, I tested that MR https://invent.kde.org/plasma/kwin/-/merge_requests/5397 but it didn't change anything. Slider still does nothing. > (In reply to Dāvis from comment #3) > > Ohh it looks like SDR Brightness calculation is wrong. Atleast for me if I > > set it to max 542 nits then I get correct saturation but screen is WAY too > > bright (it daylight can be fine but at night I don't want to be blinded :D) > > With HDR disabled I can set monitor's builtin brightness to 0% and colors > > are still saturated while screen being dim/non-bright. > > > > So I think KWin does brightness wrong, it probably needs to increase > > saturation when decreasing brightness to keep same ratio so that colors > > don't look washed out or something like that. > You're not entirely wrong, the perceived intensity of a color is tied to its > brightness, and that's much more noticeable when the color is less > saturated. I'm not sure yet if we should do anything about that in KWin > though. > I don't see why there couldn't be more configuration options. For example I have Android phone with HDR and there are a lot of settings that I can adjust. See attached screenshots (Android (MIUI) HDR/Color settings) of setting pages. Such settings might especially matter for people with various forms of color blindness and such. Also even for me if I have been seeing colors wrong my whole life I don't really care that now they are more "correct" if they look worse to me. I think perceived good looking colors can be subjective. Of course if I'm editing some video/photo then I do want most accurate colors but my issue is specifically about how application icons/colors looks like with HDR mode on. > (In reply to Dāvis from comment #4) > > No, it's not related to brightness, colors are just wrong, it's very > > noticeable when opening `htop` in Konsole and switching between HDR on and > > HDR off. The difference is so insane that HDR off looks WAY better and more > > "HDR" than with HDR on... Even with 542 nits those colors look washed out > > and not as "bright/colorful". > To some degree, that is expected. Without color management, wide color gamut > displays show very oversaturated colors, and if you get used to that, the > correct colors seem desaturated. > If that's actually what's happening for you though is hard do judge without > objective measurements. If you have access to a colorimeter, could you > measure what color gamut KWin actually outputs for sRGB apps? If you don't, > a visual comparison with a display close to sRGB (most laptops have that) > would also be useful. I don't have colorimeter and I don't really know what you mean but I took photos with my DSLR camera in 14-bit Adobe RGB where can compare HDR on vs off in exactly same settings: ISO 400, F/8, 1/50s Here: https://drive.google.com/drive/folders/1oMdpwjY0JUAtXfkVxVoKM1E-yuqppmrd?usp=drive_link They're unedited RAW so all information is there, you can open them with Gwenview and Darktable. There can clearly see that left side red image is more orange in HDR on but more bright red in off. Also in Konsole yellow and cyan is more intense with HDR off. That displayed red image is this so you can compare those photos with it => https://webkit.org/blog-files/color-gamut/Webkit-logo-P3.png (it's 16-bit color) While looking into this I found bunch of interesting things, most programs can't render that image but shows only red without that logo being visible. I tested Firefox, Chrome on both Linux and Windows and Edge aswell and none could show it. Gwenview also doesn't show it. But KolourPaint and mpv can show it. I also looked into HDR tests but I couldn't find any that would prove that HDR works... https://www.wide-gamut.com/test/image-hdr => says "It looks like your monitor or browser does not support HDR images :( The images below may not display correctly" - but maybe that test itself doesn't work rather than my HDR not working :D It doesn't work on my HDR phone either and here https://webkit.org/blog-files/color-gamut/comparison.html I see image/color difference even in SDR... I also tried looking at HDR movie with mpv but didn't see any difference either. I installed `vk-hdr-layer-kwin6-git` from AUR and used > ENABLE_HDR_WSI=1 mpv --vid=1 --aid=6 --vo=gpu-next --target-colorspace-hint > --gpu-api=vulkan --gpu-context=waylandvk MOVIE where MOVIE is > hevc (Main 10) (HDMV / 0x564D4448), yuv420p10le(tv, > bt2020nc/bt2020/smpte2084), 3840x2160 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 > tbr, 90k tbn -- You are receiving this mail because: You are watching all bug changes.
