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When the pointer crosses monitors, we account for a single motion event resulting in the pointer moving across more than 2 monitors, in order to correctly account each monitor scale and the distance traversed across each monitor in the resulting relative motion vector. However, memory on the direction is kept short, each iteration to find the target view just remembers the direction it came from. This brings a pathological case with 4 monitors with the same resolution in a 2x2 grid, and a motion vector that crosses monitors at the intersection of all 4 in a perfect diagonal. (Say, monitors are all 1920x1080 and pointer moves from 1920,1080 to 1919,1079). In that case, the intersection point at the crossing between 4 monitors (say, 1920,1080) will be considered to intersect with 2 edges of each view. Since there is always at least 2 directions to try, the loop will always find the direction other than the one it came from, and as a result endlessly jump across all 4 possible choices. In order to fix this, consider only the global v/h directions, we already know if the pointer moves left/right or up/down, so only consider those directions to jump across monitors. For the case at hand, this will result in three monitors visited, (either bottomright/bottomleft/topleft, or bottomright/topright/topleft) with a total distance of 0,0 in the middle one, effectively resulting in a correct diagonal motion. Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2598 Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2803> |
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| backends | ||
| compositor | ||
| core | ||
| frames | ||
| meta | ||
| tests | ||
| wayland | ||
| x11 | ||
| libmutter.pc.in | ||
| meson.build | ||
| meta-private-enum-types.c.in | ||
| meta-private-enum-types.h.in | ||