More fun with HiDPI: Only every second pixel can be picked.

[moqmar]

Yep, that's right. If there's a one-pixel line on a screen scaled by 2 (using GNOME 3.20.4), there's a 50% chance that I can't pick its color at all. I rarely want to pick a single pixel, but it's still an annoying bug... I guess the final solution would be to disable DPI scaling completely for the picker window/cursor, but I don't have any clue how that would work.

[moqmar]

Update: GDK_SCALE=1 CURSOR_SCALE=1 pick-colour-picker fixes this, but obviously makes the UI pretty ugly.