Shape turns an input into an output.

Bounds describes the minor-axis bounds of a line of text.

Glyph describes the attributes of a single glyph from a single font face in a shaped output.

InvalidRunError represents an invalid run of text, either because the end is before the start or because start or end is greater than the length.

MissingGlyphError indicates that the font used in shaping did not have a glyph needed to complete the shaping.

Output describes the dimensions and content of shaped text.

UnimplementedDirectionError is returned when a function does not support the provided layout direction yet.