Comment by socalgal2
13 hours ago
This has the same issue as most screenshot software, it's out of date relative to modern devices. Every Mac laptop for the last ~4 years has an HDR display. Many windows devices are also HDR. But this app doesn't capture HDR.
I tried putting up an HDR image and then capturing the screen. All HDR brightness was gone from the image.
I get it's not easy per-se. It wasn't until MacOS Tahoe that Apple's own screen capture on Mac started supporting HDR. Windows 10/11, AFAIK, only supports HDR through the XBox Game Bar's capture. Apps like ShareX still only capture SDR.
I mostly bring that up because I have apps the draw HDR and spent some time trying to find ways to add tests that we're actually getting HDR on the screen using screen captures. I hit a wall and gave up (2021).
The readme suggests this is a Linux-first app and as HDR basically doesn’t work at all on Linux(?) I don’t think it’s very surprising that this app doesn’t handle it.
It does a great job for my purposes – describing which buttons to click over email or im.
Haven't used this app for ages, but yesterday I fine-tuned the HDR settings for my newly bought laptop under KDE/plasma, definitely on Linux. That readme might be outdated (or the tool doesn't work on KDE at all)
My understanding of the landscape currently is that KDE Plasma is the only major DE that supports HDR. I use it for Steam for that reason.
Yeah I think I’m a bit outdated here. But I do think Linux hdr support is weak enough that many Linux-oriented apps are unlikely to do it well
HDR videos and games (both native and proton) work in both KDE and Gnome (and supposedly Sway and Hyprland, but I haven't tried either). I think support in KDE/Gnome landed in a stable release ~6 months ago.
The HDR experience on KDE is about as good as the Windows one. Last time I tried Gnome, there was no way to configure SDR and HDR brightness separately, but it was definitely still usable.
This has been my experience as well, I've searched high and low for a screenshot software that supports HDR and found none. It's the sole reason I have HDR disabled. At least microsoft updated snipping tool now, but the usability is nothing close compared to Flameshot or Lightshot.
For what it's worth, I notice this week that the built in macOs screenshot tool will capture in HDR.
I did some Googling to discover if Qt supports HDR on MacOS. It looks like support is currently limited, but it is an area of active development.
Jan 2024: https://www.qt.io/blog/window-embedding-in-qt-quick
Sep 2025: https://forum.qt.io/topic/163224/hdr-example-code
Latest docs (search for "HDR"): https://doc.qt.io/qt-6/qvideoframeformat.html
This Reddit post: https://www.reddit.com/r/macapps/comments/1ibala5/ive_discov...
... shares info about a Swift-based screen recorder that claims to support HDR. (I have no ability to verify that.) That might work for you.
>But this app doesn't capture HDR.
When you say the Xbox game bar accounts for it, do you mean video or still images? I've had HDR disabled for some time but I remember win+shift+s on Windows 11 capturing over-exposed screenshots when playing videogames.
The Xbox Game Bar video and still images do support HDR. They were the first feature to support HDR on windows. More recently the Snipping Tool on 11 also supports HDR, but only the newer one, not the older snipping tool. If you get images in JXR (jpeg-xr) files then you have HDR, if you get over-exposed pngs/jpgs then it doesnt do HDR.