Spectacle's toolbar while capturing a screenshot via the region selection feature shows a wrong pixel size for the selected area. STEPS TO REPRODUCE Internal display is enough to reproduce this one. My laptop's display has a resolution of 2256x1504, but I scale it at 125% (setting a scale factor is crucial to reproduce) Launch spectacle and choose the region screenshot feature. Now drag a rectangle and check the pixel size the toolbar shows for the selected area: it is probably much higher than the actual pixel count. To prove this, you can just draw a rectangle from the top left to the bottom right corner of the screen, and you will see an exaggerated pixel size for it. In my case at 125% it says "3609x2405" (which isn't even native resolution * 1.25, by quite a margin). The captured image has the correct resolution, though (2256x1504).
Working fine of course at 100%, but also at 200%.
Created attachment 176600 [details] Shows the wrong pixel values for various global scale % I can reproduce this on Kubuntu 24.10 (Plasma 6.1.5, Frameworks 6.6.0, Qt 6.6.2), Wayland, on a 2K monitor (2560x1440). I tested various global scale percentages and I believe I found the "formula" of the error. On 100%, 200%, 300% pixels are reported correctly. In the attached table, I've shown the reported pixels when I select the rectangular region to be as large as possible (i.e. to encompass the whole screen) and I compared that with the expected resolution. Small rounding errors are possible. So for the fractional global scale values it seems that the number of pixels displayed is A times larger than expected, where A is computed as: A = CEIL(GlobalScale) / GlobalScale
*** Bug 491991 has been marked as a duplicate of this bug. ***
Still happening with Spectacle 6.3.1
Also, when reaching the boundaries of the screen while drawing a rectangular selection, the popup showing the dimensions disappears as its kicked out of screen boundaries. It should move dynamically (or always be displayed inside the rectangle?)
*** Bug 510569 has been marked as a duplicate of this bug. ***
A possibly relevant merge request was started @ https://invent.kde.org/plasma/spectacle/-/merge_requests/506
Git commit e63c14c3d32c0a610470f3000298e891bbc48b68 by Noah Davis. Committed on 03/02/2026 at 20:40. Pushed by ndavis into branch 'master'. CaptureOverlay: Fix sizes in size tooltips with screen scales smaller than the largest Previously, displayed selection sizes were based on the region of the internal combined screens image that was selected for screenshots or the largest of all screen scales for screencasts. That seemed a bit strange to users who wouldn't have any clue about how spectacle works internally and was just wrong about the final output sometimes. Now we try to show sizes based on the screen scales that overlap with the selection. For screenshots, Spectacle tries to scale the image of the region to the original screen scale if the region is only in an area with one scale. If there are multiple scales, especially fractional scales, the image may be larger than expected to some users due to Spectacle upscaling to an integer scale. Upscaling to integers is done to preserve the crispness of integer scale screens since fractional scale screens will typically have some issues with blurriness anyway. For screencasts, we use the largest screen scale overlapping with the selected region. M +51 -36 src/Gui/CaptureOverlay.qml M +1 -1 src/Gui/SizeLabel.qml https://invent.kde.org/plasma/spectacle/-/commit/e63c14c3d32c0a610470f3000298e891bbc48b68
Git commit 666f1171c09eff4bf50fd242a12a39ebb215e205 by Noah Davis. Committed on 04/02/2026 at 00:29. Pushed by ndavis into branch 'Plasma/6.6'. CaptureOverlay: Fix sizes in size tooltips with screen scales smaller than the largest Previously, displayed selection sizes were based on the region of the internal combined screens image that was selected for screenshots or the largest of all screen scales for screencasts. That seemed a bit strange to users who wouldn't have any clue about how spectacle works internally and was just wrong about the final output sometimes. Now we try to show sizes based on the screen scales that overlap with the selection. For screenshots, Spectacle tries to scale the image of the region to the original screen scale if the region is only in an area with one scale. If there are multiple scales, especially fractional scales, the image may be larger than expected to some users due to Spectacle upscaling to an integer scale. Upscaling to integers is done to preserve the crispness of integer scale screens since fractional scale screens will typically have some issues with blurriness anyway. For screencasts, we use the largest screen scale overlapping with the selected region. (cherry picked from commit e63c14c3d32c0a610470f3000298e891bbc48b68) M +51 -36 src/Gui/CaptureOverlay.qml M +1 -1 src/Gui/SizeLabel.qml https://invent.kde.org/plasma/spectacle/-/commit/666f1171c09eff4bf50fd242a12a39ebb215e205