Re: Xft dpi font scaling

Aidan Kehoe writes: That's right. If your X server is providing the right DPI for the screen, fontconfig will automatically scale points to pixels correctly. I don't think that's likely, given: Most of the "menus and such" have their fonts configured through X resources rather than XEmacs faces. I think that most likely something is going on in the face processing, but I don't have a good idea what that might be offhand. XEmacs *should* be passing the fontspec directly to fontconfig, which then finds the font, and passes that and the spec to Xft, which renders at the right scale. I don't recall that XEmacs tries to adjust fontconfig specs in any way. On my own system this "just works", and the screens that get switched are a Mac Book Pro 13" (2560x1600) and a Thunderbolt 26" (2560x1440). so I should see the same effect that you do. But I don't. Have you tried other fonts? Do you use this font with other applications? What are the results in those cases? (I don't mean to "blame the victim", but with the information I have so far the only suggestion I have that would give quick resolution is that the font is somehow broken, and a different font would work.) If the font does work correctly in other applications and different fonts show the same behavior in XEmacs, the next step would be to check to see if XEmacs knows the actual dimensions of the screen. You can get this information by evaluating (list (device-pixel-width (selected-device)) (device-pixel-height (selected-device)) (device-mm-width (selected-device)) (device-mm-height (selected-device))) This doesn't doesn't give the right answers with both screens active on my Mac although xdpyinfo seems to work correctly. I will investigate that, but can't promise any results soon. It doesn't surprise me that something weird would be going on in X since the Mac will mirror or tile the screens at the Quartz level and authomatically adjust things, so X doesn't actually know what's going on. But it does suggest that XEmacs is messed up here somehow. Regards Steve