Incorrect Screen Resolution Detection in swww for 4K Monitor in Portrait Mode with Hyprland

[SkyWar-design]

Hello! I'm using a computer with two monitors.

Hyprland 0.45.0 built from branch
swww version: 0.9.5

~/.config/hypr/monitors.conf:

# Generated by nwg-displays. Do not edit manually.
monitor=DP-2,[email protected],1507x0,1.5
monitor=DP-2,transform,3
monitor=DP-3,[email protected],2947x360,1.0,bitdepth,10

xrandr output:

DP-3 connected primary 2560x1440+2160+0
DP-2 connected 2160x3840+0+0

DP-2 is a 4K monitor in portrait mode (vertically oriented).

Current issue upon startup: swww query output:

DP-2: 2560x1440, scale: 1.5
DP-3: 2560x1440, scale: 1

In this scaling mode, swww doesn’t stretch the wallpaper to cover the entire screen because it detects DP-2 as having a resolution of 2560x1440 and centers the image instead.

Workaround:
If I edit the line:
monitor=DP-2,[email protected],1507x0,1.5

to
monitor=DP-2,[email protected],1507x0,1.0

and then change it back to

monitor=DP-2,[email protected],1507x0,1.5

while Hyprland is running, swww then shows the correct resolution in swww query:

DP-2: 1440x2560, scale: 1.5 
DP-3: 2560x1440, scale: 1

[Mange]

I have a similar issue after upgrading Hyprland. My portrait monitor will not crop the image anymore, instead showing black (not --fill-colors) around a centered image.

swww query reports the screen's resolution, but not anything about it being rotated.

> swww query
DP-1: 2560x1440, scale: 1, currently displaying: image: …
DP-2: 2560x1440, scale: 1, currently displaying: image: …
DP-3: 2560x1440, scale: 1, currently displaying: image: …

DP-3 is rotated and I would assume it should be displaying 1440x2560 instead.

> swww --version
swww 0.9.5

> hyprctl version
Hyprland, built from branch v0.44.1-b at commit 4520b30d498daca8079365bdb909a8dea38e8d55  (version: bump to 0.44.1).
Date: 2024-10-09
Tag: v0.44.1, commits: 4520b30d498daca8079365bdb909a8dea38e8d55
built against aquamarine 0.4.3

Thankfully this happened after I bumped my NixOS build, so I have an easy time to diff the changes in versions between the build. I think these might be related:

[U.]  #004  aquamarine                     0.4.1 -> 0.4.3
[U*]  #084  hyprland                       0.43.0, 0.43.0-man -> 0.44.1, 0.44.1-man

I think it might relate to this Hyprland issue, where people conclude that latest main of swww works. There's a lot of unreleased commits in main right now.

I don't care enough about this problem right now to switch to a from-source version of swww, but these are the breadcrumbs I found. Maybe it will be helpful to someone. :-)