Re: Xft dpi font scaling

Hi René -- Ar an ceathrú lá de mí na Nollaig, scríobh René Rebe: > since years I use xemacs-beta, currently 21.5.34: > > https://t2sde.org/packages/xemacs-beta > > Except the lack of updates I am quite happy with that setup, however one > details drives me increasingly crazy. Namely HiDPI font scaling when I > switch between old displays and newer, 4k+ HiDPI, 192++ dpi screens. ; > I have this font selection in my .xemacs/init.el > > (set-face-font 'default "Source Code Pro-13") ; or -22 for HiDPI > > Ideally I want this -13 to be pt, so that I do not have to edit the file > each time I switch my desk or continue coding on the road. In fontconfig theory the -13 is pt, so it seems that the underlying library isn’t handling it correctly. > Googling around suggest others alternative forms which either do not > work in xemacs-beta, or do not prove the situation. > > I tried to read the lisp files, but could not find anything that would > help me there either. > > Is there anything "pt" like so that a 13pt would result in say 13 pixels > on a low resolution display, and 26 (or whatever) pixels on a HiDPI > screen with the X server dpi set accordingly? > > PS: Surprisingly the Xemacs menus and such sale automatically, just not > this most important, main edit buffer, ..? ... except this suggests it does!? Xft isn’t my bailiwick, and I don’t have a high-DPI screen available to reproduce ± debug this issue. Stephen?