14:53 <leon-p> dnkl: in fcft, I assume the canonical way to handle rendering with scale is using fcft_size_adjust() to get a local scaled clone of a font. That function takes a scale in points, a Wayland client using the fract scale protocol has a scale in x/120. I am not certain how to convert between the two, do you have any pointers?

14:54 <dnkl> leon-p: that function has been removed

14:54 <leon-p> oh. it's still in the docs/ directory

14:55 <dnkl> that's a bug :)

14:56 <dnkl> what foot does is simply create a new instance, where you calculate the size yourself

14:56 <leon-p> so what do I need to do if I want to render on arbitrary surfaces across arbitrary outputs with arbitrary scales? Just keep a list of fcft fonts for each scale? And I'd still need to know how to convert wayland scale to points

15:12 <dnkl> leon-p: yes, you need one instance per size.

15:13 <dnkl> as for points vs. scale; I just multiply the user configured (point) size by the Wayland scale factor

16:39 <leon-p> ah, so you're manually parsing the font description string for the size=XX part and then overwrite it with the attributes modifier?

16:45 <dnkl> yes, see https://codeberg.org/dnkl/foot/src/branch/master/config.c#L3684

16:45 <leon-p> and makes sense that you can scale points linearily unit-wise, I just wasn't sure if it had some arbitrary origin point that isn't 0

16:46 <leon-p> thanks! exactly the info that I needed, guess I am writing a font-pool now

17:56 <dnkl> leon-p: btw, most applications set DPI to 96, while fontconfig's (and thus fcft's) default is 75.

17:56 <dnkl> if you get it wrong, your application will render fonts at a different size compared to other applications