otMathGetGlyphVariants

uint otMathGetGlyphVariants(harfbuzz.font.Font font,  harfbuzz.types.Codepoint glyph,  harfbuzz.types.Direction direction,  uint  startOffset,  ref  harfbuzz.types.OtMathGlyphVariant[]  variants)

Fetches the MathGlyphConstruction for the specified font, glyph index, and direction. The corresponding list of size variants is returned as a list of #hb_ot_math_glyph_variant_t structs.

<note>The direction parameter is only used to select between horizontal

or vertical directions for the construction. Even though all #hb_direction_t values are accepted, only the result of #HB_DIRECTION_IS_HORIZONTAL is considered.</note>

Parameters

`font`	#hb_font_t to work upon
`glyph`	The index of the glyph to stretch
`direction`	The direction of the stretching (horizontal or vertical)
`startOffset`	offset of the first variant to retrieve
`variants`	array of variants returned

Returns

the total number of size variants available or zero