Same blur values are different on monitors with different resolutions

[Blaadick]

System Info and Hyprland Version

System/Version info

Hyprland 0.48.1 built from branch  at commit 29e2e59fdbab8ed2cc23a20e3c6043d5decb5cdc  (version: bump to v0.48.1).
Date: Fri Mar 28 16:16:07 2025
Tag: v0.48.1, commits: 5937
built against:
 aquamarine 0.8.0
 hyprlang 0.6.0
 hyprutils 0.5.2
 hyprcursor 0.1.12
 hyprgraphics 0.1.2


no flags were set


System Information:
System name: Linux
Node name: blaad-pc
Release: 6.13.8-zen1-1-zen
Version: #1 ZEN SMP PREEMPT_DYNAMIC Sun, 23 Mar 2025 17:17:17 +0000


GPU information: 
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation TU106 [GeForce RTX 2060 SUPER] [10de:1f06] (rev a1) (prog-if 00 [VGA controller])
NVRM version: NVIDIA UNIX x86_64 Kernel Module  570.133.07  Fri Mar 14 13:12:07 UTC 2025


os-release: NAME="Arch Linux"
PRETTY_NAME="Arch Linux"
ID=arch
BUILD_ID=rolling
ANSI_COLOR="38;2;23;147;209"
HOME_URL="https://archlinux.org/"
DOCUMENTATION_URL="https://wiki.archlinux.org/"
SUPPORT_URL="https://bbs.archlinux.org/"
BUG_REPORT_URL="https://gitlab.archlinux.org/groups/archlinux/-/issues"
PRIVACY_POLICY_URL="https://terms.archlinux.org/docs/privacy-policy/"
LOGO=archlinux-logo


plugins:

======Config-Start======


Config File: /home/blaadick/.config/hypr/hyprland.conf: Read Succeeded
source = ./default/autostart.conf
source = ./default/keybinds.conf
source = ./default/monitors-pc.conf
# source = ./default/monitors-lt.conf
source = ./default/rules.conf

env = XCURSOR_THEME, Adwaita
env = XCURSOR_SIZE, 24
env = GDK_SCALE, 2

general {
    gaps_in = 5
    gaps_out = 10
    border_size = 0
    resize_on_border = true
}

decoration {
    rounding = 10

    blur {
        enabled = true
        ignore_opacity = true
        popups = true
        size = 2
        passes = 4
        noise = 0
        contrast = 1
        brightness = 1
        vibrancy = 0
    }
}

animations {
    bezier = curve, 0.2, 1.05, 0.2, 1.05

    animation = windows, 1, 5, curve
    animation = workspaces, 1, 5, curve
}

dwindle {
    smart_split = true
}

misc {
    disable_hyprland_logo = true
    animate_manual_resizes = true
    animate_mouse_windowdragging = true
    middle_click_paste = false
}

input {
    numlock_by_default = true
    kb_layout = us, ru
    kb_options = grp:alt_shift_toggle
    repeat_rate = 75
    follow_mouse = 1

    touchpad {
        clickfinger_behavior = true
    }
}

gestures {
    workspace_swipe = true
    workspace_swipe_invert = false
}

device {
    name = compx-2.4g-wireless-receiver
    sensitivity = -0.75
}

cursor {
    no_hardware_cursors = true
}

opengl {
    nvidia_anti_flicker = true
}

xwayland {
    force_zero_scaling = true
}


Config File: /home/blaadick/.config/hypr/default/autostart.conf: Read Succeeded
# Foreground
execr-once = hyprpaper
execr-once = ~/Scripts/toggle_bar.sh
execr-once = firefox

# Background
execr-once = hypridle
execr-once = hyprswitch init --custom-css ~/.config/hyprswitch.css --show-title
execr-once = vesktop --start-minimized
execr-once = steam -silent


Config File: /home/blaadick/.config/hypr/default/keybinds.conf: Read Succeeded
bind = super, q, killactive
bind = super, v, togglefloating
bind = alt, Return, fullscreen
bind = super, l, exec, hyprlock

bind = super, r, exec, wofi --show drun --allow-images
bind = super, t, exec, kitty -e fish -c "fastfetch && exec fish"
bind = super, e, exec, nautilus --new-window
bind = super, b, exec, firefox
bind = super alt, B, exec, torbrowser-launcher
bind = super, d, exec, vesktop
bind = super, m, exec, youtube-music

bind = super shift, s, exec, grim -g "$(slurp -d -b 00000080 -c 00000000)" - | wl-copy
bind = super shift, x, exec, hyprctl -j activewindow | jq -r '"\(.at[0]),\(.at[1]) \(.size[0])x\(.size[1])"' | grim -g - - | wl-copy
bind = , Print, exec, grim - | wl-copy
bind = super shift, c, exec, hyprpicker -n -a
bind = super, p, exec, ~/Scripts/toggle_bar.sh
bind = super, o, exec, ~/Scripts/walltest.sh

bind = alt, tab, exec, hyprswitch gui --filter-current-monitor --mod-key alt --key tab --close mod-key-release --reverse-key=mod=shift && hyprswitch dispatch

bindel = , XF86MonBrightnessUp, exec, brightnessctl set 5%+
bindel = , XF86MonBrightnessDown, exec, brightnessctl set 5%-
bindel = , XF86AudioRaiseVolume, exec, wpctl set-volume @DEFAULT_AUDIO_SINK@ 5%+
bindel = , XF86AudioLowerVolume, exec, wpctl set-volume @DEFAULT_AUDIO_SINK@ 5%-
bindl = , XF86AudioMute, exec, wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle
bindl = , XF86AudioMicMute, exec, wpctl set-mute @DEFAULT_AUDIO_SOURCE@ toggle
bindl = , XF86AudioPause, exec, playerctl play-pause
bindl = , XF86AudioPlay, exec, playerctl play-pause
bindl = , XF86AudioPrev, exec, playerctl previous
bindl = , XF86AudioNext, exec, playerctl next

bind = super, left, movefocus, l
bind = super, right, movefocus, r
bind = super, up, movefocus, u
bind = super, down, movefocus, d

bind = super, 1, workspace, 1
bind = super, 2, workspace, 2
bind = super, 3, workspace, 3
bind = super, 4, workspace, 4
bind = super, 5, workspace, 5
bind = super, 6, workspace, 6
bind = super, 7, workspace, 7
bind = super, 8, workspace, 8
bind = super, 9, workspace, 9
bind = super, 0, workspace, 10

bind = super shift, 1, movetoworkspace, 1
bind = super shift, 2, movetoworkspace, 2
bind = super shift, 3, movetoworkspace, 3
bind = super shift, 4, movetoworkspace, 4
bind = super shift, 5, movetoworkspace, 5
bind = super shift, 6, movetoworkspace, 6
bind = super shift, 7, movetoworkspace, 7
bind = super shift, 8, movetoworkspace, 8
bind = super shift, 9, movetoworkspace, 9
bind = super shift, 0, movetoworkspace, 10

bind = super, mouse_down, workspace, e+1
bind = super, mouse_up, workspace, e-1

bindm = super, mouse:272, movewindow
bindm = super, mouse:273, resizewindow


Config File: /home/blaadick/.config/hypr/default/monitors-pc.conf: Read Succeeded
monitor = DP-1, highres@highrr, 0x0, 2, vrr, 1, bitdepth, 10
monitor = HDMI-A-1, highres@highrr, -1920x0, 1, vrr, 1


Config File: /home/blaadick/.config/hypr/default/rules.conf: Read Succeeded
windowrule = suppressevent maximize, class:.*
windowrule = nofocus, class:^$, title:^$, xwayland:1, floating:1, fullscreen:0, pinned:0
windowrule = tile, class:^(Aseprite)$
windowrule = noinitialfocus, class:(jetbrains-)(.*), floating:1

layerrule = blur, eww
layerrule = ignorezero, eww

======Config-End========

Regression?

No

Description

Actual blur values, size and phases, differ by 2 times on monitors with resolutions 1920x1080 and 3840x2160.

Left monitor: 1920x1080. Right monitor: 3840x2160

How to reproduce

Connect 2 monitors with different resolutions, turn on blur and twitch its values.

[Atemo-C]

The blur should be the same, but it probably appears different due to the different resolution — With double the resolution and the same blur power, it will look only half as blurry. I do not know if it is currently possible to set a different blur strength per monitor.

[Blaadick]

That's right. It seems to me that the same values should look the same regardless of the device, even if it will be possible to change the values for each individual monitor.

[alba4k]

Does that happen regardless of scaling? Also, upvoting as I think this shouldn't be a thing to begin with

[Blaadick]

Yeah, scaling has no effect on that.

[vaxerski]

essentially, blur should be "multiplied" by scale, correct?

[Blaadick]

As I noticed, only decoration:blur:size affects the final picture. It is possible to automatically multiply this value for each individual monitor by some coefficient not to rewrite the shader, for example (screenWidth / 1920 + screenHeight / 1080) / 2. Also, as @alba4k wrote it is possible to do something like this:

decoration {
    blur {
        enabled = true
        
        # monitorrule = name, size, passes, noise, contrast, brightness, vibrancy
        monitorrule = DP-1, 4, 4, 0, 1, 1, 0
        monitorrule = HDMI-A-1, 2, 4, 0, 1, 1, 0
    }
}

[alba4k]

monitorrule would be a new keyword tho, not a variable inside of decoration:blur

[fxzzi]

scale doesn't effect this issue 4 me, I have a 1440p and a 1080p monitor both at 1x scale and the blur on my 1080p is still stronger than on my 1440p

[Blaadick]

I have a few options for how this might look:

1. Easier than the others.

decoration {
    blur {
        # monitorrule = name, size, passes, noise, contrast, brightness, vibrancy
        monitorrule = DP-1, 4, 4, 0, 1, 1, 0
        monitorrule = HDMI-A-1, 2, 4, 0, 1, 1, 0
    }
}

2. As @alba4k suggested, add a separate monitorrule, but I don't know what else besides blur settings can be added there.

monitorrule = DP-1, bsize:4, bpasses:4, bnoise:0, bcontrast:1, bbrightness:1, bvibrancy:0
monitorrule = HDMI-A-1, bsize:2, bpasses:4, bnoise:0, bcontrast:1, bbrightness:1, bvibrancy:0

3. Probably will have to rewrite a lot. Add to each decoration setting a choice of which monitor it will work on.
   If no monitor is specified, the setting applies to all monitors. If the setting is specified for only one monitor, the others use the default setting.

decoration {
    rounding = 10

    blur {
        enabled = true
        ignore_opacity = true
        popups = true
        
        size = DP-1, 4
        size = HDMI-A-1, 2
        passes = 4
        noise = 0
        contrast = 1
        brightness = 1
        vibrancy = 0
    }
}

[Blaadick]

If I think about it, a simple decoration:blur:monitor_scale_influence setting can be used to solve this problem. If enabled ― blur:size is multiplied by monitor:scale, for each monitor separately. What I described above is more related to #11492