Type Definition smufl::GlyphAdvanceWidths

pub type GlyphAdvanceWidths = GlyphData<StaffSpaces>;

Advance width of each glyph.

The advance width is defined as the width of a glyph as measured from its origin to the origin of the next glyph on the line. In text fonts for many languages, glyphs normally have positive left and right side-bearings, i.e. space to either side of the glyph, so that a string of glyphs will show the expected letter spacing. The advance width includes these side-bearing values. If a glyph’s path protrudes beyond the width defined for the glyph in the font, however, these protrusions to the left or the right – which can be termed negative side-bearings – are not included in the advance width.

In SMuFL fonts, glyphs typically have zero left and right side-bearings, and some glyphs may have negative side-bearings. For example, StemSulPonticello has a very narrow width, and large negative side-bearings to accommodate the sul ponticello sign that is centered on the stem.

See the SMuFL documentation.