fn effective_variations(
cache: &mut Cache,
span: &Span,
glyph: &PositionedGlyph,
) -> Vec<FontVariation>Expand description
Returns the effective variation settings for a glyph: the span’s explicit
variations plus an automatically computed opsz value when
font-optical-sizing: auto is in effect and the font has an opsz axis
that wasn’t set explicitly. This matches browser behavior
(CSS font-optical-sizing: auto).