add adaptive side-bearing calculation

[dummy-index]

Measure the shape within the bounding box and determine the bearing amount.

• calculating excluding the tails of g, j, etc., and the arm of f. However, f is restricted so that its arm does not pass through neighboring letters like l. Additional kerning is required to tighten combinations like ff or fg.
• Feeling that you want to tighten the spacing after the letter 'r' is likely because the adopted 'r' has a fairly wide character shape. We have added processing to tighten the spacing, including for other wide character shapes as well.

[pelson]

Tighter, but looks good to me. 👍

[pelson]

Looks good to me. 👍