Add autohint checkbox to KCM fonts

Review Request #123186 - Created March 30, 2015 and updated

Information
Andrey Bondrov
plasma-desktop
master
Reviewers
kde-workspace
graesslin, hein

We need to add autohint checkbox to KCM fonts, this feature is requested by various users downstream (for example, see https://bugs.mageia.org/show_bug.cgi?id=1240 ).

I patched kde-workspace 4.9 in 2012, now I'd like to submit my patch upstream to have this feature in Plasma 5 for every distribution.

BTW, LXQt already added autohint option to font settings several monthes ago: https://github.com/lxde/lxqt-config/pull/13#event-187605798

Old KDE 4 patch was used by ROSA and OpenMandriva since 2012, no issues with it. I had to adjust it a bit to follow Plasma 5 changes but in general it's old well-tested patch. Seems to work fine for me.

Thomas Lübking

From my own experience, autohinting is no "yes or no" question.
=> Should downstream not rather provide global fontconfig snippets that enable autohinting for fonts with (known) crap BC hinting?

  1. Sometimes it's still "yes or no". For example, I prefer to turn subpixel rendering and BC off for Liberation Sans (just because I don't want my fonts to be RGB-colored). But I guess most people prefer subpixel rendering and BC for Liberation Sans fonts. BC for LS fonts is a matter of taste.

  2. I think this is a misunderstanding:
    I did not mean "it's not a matter of choice" but rather "it is a matter of choice per font"

    Ie. some fonts have great BC hinting and some (ok: many fun-fonts found on dafont ;-) have crap hints. For them the autohinter would produce better results, by the cost of damaging the usefully hinted ones.

    I'm not familiar w/ the code, but it looks like it applies a global match, ie. all fonts will be autohinted, not the one(s) set in that kcm?

    Subpixel rendering otoh is (to me) rather a matter of personal global taste, maybe combined w/ the display (resolution)

  3. Yes, autohint affects all fonts. But some people like me use prefered font where it's possible (DE, browser etc). So I just set autohint in fonts KCM instead of using custom fontconfig configs (as we cannot turn on autohint for Liberation fonts in distro fontconfig, many people are likely to suffer from that, Liberation fonts look much better with BCI than with autohint when used with subpixel rendering).

    Surely I don't want to force this feature to be accepted upstream. For me it's just one patch less to maintain downstream. Out of ~100 KDE4 patches I have to port to Plasma 5. :-)

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