# `hhea`: Horizontal Header table

The `hhea` table is an OpenType table.

class fontTools.ttLib.tables._h_h_e_a.table__h_h_e_a(tag=None)

  Bases: `DefaultTable`

  Horizontal Header table

  The `hhea` table contains information needed during horizontal text layout.

  Note

  This converter class is kept in sync with the `_v_h_e_a.table__v_h_e_a` table constructor.

  See also https://learn.microsoft.com/en-us/typography/opentype/spec/hhea

  dependencies = ['hmtx', 'glyf', 'CFF ', 'CFF2']
  property ascender
  property descender
  decompile(data, ttFont)
  compile(ttFont)
  recalc(ttFont)
  mergeMap = {'*': <function equal>, 'advanceWidthMax': <built-in function max>, 'ascent': <built-in function max>, 'caretOffset': <function first>, 'caretSlopeRise': <function first>, 'caretSlopeRun': <function first>, 'descent': <built-in function min>, 'lineGap': <built-in function max>, 'minLeftSideBearing': <built-in function min>, 'minRightSideBearing': <built-in function min>, 'numberOfHMetrics': <function recalculate>, 'tableTag': <function equal>, 'tableVersion': <built-in function max>, 'xMaxExtent': <built-in function max>}
  toXML(writer, ttFont)
  fromXML(name, attrs, content, ttFont)