On Wed, Nov 22, 2023 at 5:22 AM Ken Moffat <zarniwhoop@xxxxxxxxxxxx> wrote: > Is it possible to change the default weights of a locally-installed > font ? If not, it seems to me that installing anything other than > normal and bold is a waste of time unless you are creating a web > page using specific weights, and for that you probably want to use > woff fonts ? Some applications may rely on "style" property to lookup a font. If you modify it, the result may be more robust. However, It may not even work if a font file picked up by fontconfig contains multiple variants and applications do the real job with the low-level APIs, because we can't modify metadata in a font. > > I have noticed so far in perhaps-related things: > > 1. In libreoffice writer (7.5) Noto Serif appears as separate fonts for > (regular), Black, ExtraBold, Light, Medium, SemiBold (I didn't > install any weights less than light) which implies they are treated > as different fonts ? I'm not sure what exactly "different fonts" means here though, some applications have their own font management and take care of a variant of the font family such as Noto Sans Regular, Noto Sans Medium, Noto Sans Bold as one font family literally such as Noto Sans. Unfortunately this isn't a feature provided by fontconfig so far. If they don't identify them that way, they just recognize them as it is. > 2. Attempting to force emboldening on some very faint fonts, such as > FreeSerif, (with attempts to also address weight "for non-cairo > apps") the results differ greatly: > > 2.1 In firefox, both normal and bold are now bold (the non-cairo > part is needed). > > 2.2 In webkitgtk (epiphany) both normal and bold become heavier on > *some* fonts - sometimes bold becomes Heavy and ugly, other times it > looks usable. Yes, I realise that embolden is intended to cater for > fonts that lack a bold variant, but nothing ventured, nothing gained. That really depends on fonts. and is completely out of the scope for fontconfig. fontconfig doesn't get involved with the rendering part at all. > > For both firefox and epiphany, the degree of enhanced weight seems > to differ between dark and light modes - but that might be my > eyesight. > > 2.3 In qt5webengine (falkon) no change. I've not installed any > other kde apps, so perhaps I'm missing an app to configure it. > And it doesn't seem to accept any envvars to force dark mode. > > 2.4 For completeness, no change in libreoffice. > > Thanks for any help. > > ĸen > -- > This is magic for grown-ups; it has to be hard because we know there's > no such thing as a free goblin. > -- Pratchett, Stewart & Cohen - The Science of Discworld II -- Akira TAGOH
