On Fri, Jan 14, 2022 at 7:02 AM Kévin Le Gouguec <kevin.legouguec@xxxxxxxxx> wrote: > (1) The weighing process described above takes place with FcFontMatch > and FcFontSort, is that correct? Meaning that given the same > FcPattern *p, as well as: Basically it is but note that you need to call FcFontRenderPrepare() yourself for the result of FcFontSort(). > > (2) Does FcFontList sort its results according to a well-defined order? > Empirically, I see that the order of the fonts returned by this > function does not match what FcFontSort returns (cf. comments in > attached snippet). No. > > (3) Given two files that define the same font, say > > - /usr/share/fonts/truetype/foo.ttf: installed by the distro, > lagging wrt its upstream developer, > > - ~/.local/share/fonts/foo.ttf: installed by the user, latest > version from upstream, > > how will FcFontMatch, FcFontSort and FcFontList sort these files? > Empirically, it seems that FcFontMatch and FcFontSort rank the > user's file higher than the distro's, but I have no idea whether > that's due to (a) the directory order in fonts.conf, (b) the font's > :version attribute, (c) the font's coverage, (d) another > well-defined quality of the font, or (e) sheer dumb luck. The latest one has a priority. It is measured by FC_FONTVERSION. If both are the same, it is up to the order of <dir> elements. the first one has a priority. > > I ran my code snippet with FC_DEBUG=7, but the "Score" lines are > identical for both files, so I'm not sure what to make of that: > > > Score 0 0 0 0 0 0 0 0 0 0 1e+99 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > > I apologize if my questions already have documented answers. Thank you > for your time. > Hope that helps, -- Akira TAGOH
