Make width blendable

[derVedro]

Hey, I am trying to mimic Source Code Pro with its wider look for my IDE. Source Code Pro is already a nice font but since I saw the superiorness of Iosevka I don't want miss that. So build my onw Iosevka ttf variant. I spend some time trying stuff and replace glyphs in private-build-plans.toml is quick task. But I don't realy understand what is going on with font wideness. I ended with setting width to 530 in parameters.toml. I am not quite sure that's the right place to do it. I got an extended Iosevka font that is nice but I feel like I missed something. e.g I do not understand what buildPlans.iosevka-custom.widths.extended section in private-build-plans.toml is for? I played with shape setting of it in vanilla example config, but I couldn't see any differences.

[be5invis]

The parameters in [buildPlans.iosevka-custom.widths.extended] are width grades instead actual character width. Currently only two width grades (5 and 7) are available.

[derVedro]

It's pity that overriding width in [buildPlans.iosevka-custom.metric-override] in private build plan doesn't change anything. Two grades are not fine enough for me. I mean 7 is too narrow and 8 is too wide. I'm afraid I have to dive into wd- magic. Can you give me some hints, what that wd-N.multiplies are for? Are they the grades?

[be5invis]

I see, you want things like wd-7.5?
Fine let me change the title...

[be5invis]

Now, in your private-build-plans.toml you can specify your characters' width like this:

[buildPlans.iosevka-custom.widths.normal]
shape = 500        # Unit Width, measured in 1/1000 em.
menu  = 5          # Width grade for the font's names.
css   = "normal"   # "font-stretch' property of webfont CSS.

[buildPlans.iosevka-custom.widths.extended]
shape = 576
menu  = 7
css   = "expanded"

We now use the actual "unit" width in the config file to customize the width. Older grades are still supported but will show up a warning and converted to the new width when building.

[derVedro]

Mother of god! That is it! It works like a charm.Thank you!