otLayoutGetBaselineWithFallback

void otLayoutGetBaselineWithFallback(harfbuzz.font.Font font,  harfbuzz.types.OtLayoutBaselineTag baselineTag,  harfbuzz.types.Direction direction,  harfbuzz.types.Tag scriptTag,  harfbuzz.types.Tag languageTag,  out  harfbuzz.types.Position coord)

Fetches a baseline value from the face, and synthesizes it if the font does not have it.

Parameters

`font`	a font
`baselineTag`	a baseline tag
`direction`	text direction.
`scriptTag`	script tag.
`languageTag`	language tag, currently unused.
`coord`	baseline value if found.