SwiftOpenType

API for OpenType tables.

Status

Access to MATH table is fully supported.

harfbuzz	SwiftOpenType
hb_ot_math_has_data	hasData
hb_ot_math_get_constant	getConstant
hb_ot_math_get_glyph_italics_correction	getGlyphItalicsCorrection
hb_ot_math_get_glyph_top_accent_attachment	getGlyphTopAccentAttachment
hb_ot_math_get_glyph_kerning	getGlyphKerning
hb_ot_math_get_glyph_kernings	getGlyphKernings, getGlyphKerningCount
hb_ot_math_is_glyph_extended_shape	isGlyphExtendedShape
hb_ot_math_get_glyph_variants	getGlyphVariants, getGlyphVariantCount
hb_ot_math_get_min_connector_overlap	getMinConnectorOverlap
hb_ot_math_get_glyph_assembly	getGlyphAssembly, getGlyphAssemblyItalicsCorrection, getGlyphAssemblyParts, getGlyphAssemblyPartCount

Example

do {
    let helvetica = CTFontCreateWithName("Helvetica" as CFString, 12.0, nil)
    let mathTable = helvetica.createCachedMathTable()
    if !mathTable.hasData() {
        print("no MATH table")
    }
}

do {
    let lmmath = CTFontCreateWithName("Latin Modern Math" as CFString, 12.0, nil)
    let mathTable = lmmath.createCachedMathTable()
    print("axis height, in design units: \(mathTable.getConstant(.axisHeight))")
}

Tests

See MathTableTests

See also

OpenTypeSwift is the repository that this codebase evolved from, which supports math constants.

OpenType Specification is the best reference.