Dpi scaling

[elpapimango]

Was messing around and found this worked pretty well for me. I have 2 monitors. One with 100% scaling and one with 150%. Compared to standard popup menu, it looks like the font is pretty much the same size.

theme.nss

$scale = reg.get('HKCU\Control Panel\Desktop', "AppliedDPI")
$dpi = $scale / 96.0
theme
{
    name="modern"
    dark=true
    view=view.auto
    background
    {
        color=auto
        opacity=auto
        effect=3
    }
    font
    {
        size=(14 * dpi)
    }
    image.align=2
}

[RubicBG]

i do not have/use 2 monitors, but i have questions:

• do you know why AppliedDPI is in HKCU\Control Panel\Desktop\WindowMetrics for me?
• why do not use LogPixels (HKCU\Control Panel\Desktop) instead?
• why don't you add TextScaleFactor too (HKCU\Software\Microsoft\Accessibility)

// Get display DPI scaling
$dpi = reg.get('HKCU\Control Panel\Desktop', 'LogPixels')
$displayScale = if(dpi==0, 96, dpi)/96  // do not know what happened if null or do not exist 
// Get accessibility text scaling
$textScale = reg.get('HKCU\Software\Microsoft\Accessibility', 'TextScaleFactor')
$textScaleFix = if(textScale==0, 100, textScale) // fix for %
$textScaleFactor = $textScaleFix/100
// Final
$finalScale = 14 * $displayScale * $textScaleFactor

[elpapimango]

I dont have LogPixels and my TextScaleFactor is always 100 even if my 4k is 150. I t5ried to see if there is per monitor setting, and i cant find this. There is "HKEY_CURRENT_USER\Control Panel\Desktop\PerMonitorSettings\XXXXXXXXXXXXXXX" but its 0 for both my screens.

do you know why AppliedDPI is in HKCU\Control Panel\Desktop\WindowMetrics for me?
Actually for me too now 🤔

[RubicBG]

DPI:

• Windows only stores one primary DPI value in this registry location, even if you have multiple monitors with different scaling settings.
• Windows doesn't expose per-monitor DPI information to the registry in a way that NS can access and use dynamically.

TextScaleFactor :

A year ago I had some ideas on the topic, but I gave up - the end result is not satisfactory. I saw the post and was curious