old_contents: """Calculate the area of a glyph."""
  
  from __future__ import print_function, division, absolute_import
  from fontTools.misc.py23 import *
  from fontTools.pens.basePen import BasePen
  
  
  def interpolate(p0, p1, t):
  	return (p0[0] * (1 - t) + p1[0] * t, p0[1] * (1 - t) + p1[1] * t)
  
  
  def polygon_area(p0, p1):
  	return -(p1[0] - p0[0]) * (p1[1] + p0[1]) * 0.5
  
  
  def quadratic_curve_area(p0, p1, p2):
  	x0, y0 = p0[0], p0[1]
  	x1, y1 = p1[0] - x0, p1[1] - y0
  	x2, y2 = p2[0] - x0, p2[1] - y0
  	return (x1*y2 - x2*y1) / 3
  
  
  def cubic_curve_area(p0, p1, p2, p3):
  	x0, y0 = p0[0], p0[1]
  	x1, y1 = p1[0] - x0, p1[1] - y0
  	x2, y2 = p2[0] - x0, p2[1] - y0
  	x3, y3 = p3[0] - x0, p3[1] - y0
  	return -(
  		x1 * (   -   y2 -   y3) +
  		x2 * (y1        - 2*y3) +
  		x3 * (y1 + 2*y2       )
  	) * 0.15
  
  
  class AreaPen(BasePen):
  
  	def __init__(self, glyphset=None):
  		BasePen.__init__(self, glyphset)
  		self.value = 0
  
  	def _moveTo(self, p0):
  		self.__startPoint = p0
  
  	def _lineTo(self, p1):
  		p0 = self._getCurrentPoint()
  		self.value += polygon_area(p0, p1)
  
  	def _curveToOne(self, p1, p2, p3):
  		p0 = self._getCurrentPoint()
  		self.value += cubic_curve_area(p0, p1, p2, p3)
  		self.value += polygon_area(p0, p3)
  
  	def _qCurveToOne(self, p1, p2):
  		p0 = self._getCurrentPoint()
  		self.value += quadratic_curve_area(p0, p1, p2)
  		self.value += polygon_area(p0, p2)
  
  	def _closePath(self):
  		p0 = self._getCurrentPoint()
  		if p0 != self.__startPoint:
  			self._lineTo(self.__startPoint)
  
new_contents: """Calculate the area of a glyph."""
  
  from __future__ import print_function, division, absolute_import
  from fontTools.misc.py23 import *
  from fontTools.pens.basePen import BasePen
  
  
  def polygon_area(p0, p1):
  	return -(p1[0] - p0[0]) * (p1[1] + p0[1]) * 0.5
  
  
  def quadratic_curve_area(p0, p1, p2):
  	x0, y0 = p0[0], p0[1]
  	x1, y1 = p1[0] - x0, p1[1] - y0
  	x2, y2 = p2[0] - x0, p2[1] - y0
  	return (x1*y2 - x2*y1) / 3
  
  
  def cubic_curve_area(p0, p1, p2, p3):
  	x0, y0 = p0[0], p0[1]
  	x1, y1 = p1[0] - x0, p1[1] - y0
  	x2, y2 = p2[0] - x0, p2[1] - y0
  	x3, y3 = p3[0] - x0, p3[1] - y0
  	return -(
  		x1 * (   -   y2 -   y3) +
  		x2 * (y1        - 2*y3) +
  		x3 * (y1 + 2*y2       )
  	) * 0.15
  
  
  class AreaPen(BasePen):
  
  	def __init__(self, glyphset=None):
  		BasePen.__init__(self, glyphset)
  		self.value = 0
  
  	def _moveTo(self, p0):
  		self.__startPoint = p0
  
  	def _lineTo(self, p1):
  		p0 = self._getCurrentPoint()
  		self.value += polygon_area(p0, p1)
  
  	def _curveToOne(self, p1, p2, p3):
  		p0 = self._getCurrentPoint()
  		self.value += cubic_curve_area(p0, p1, p2, p3)
  		self.value += polygon_area(p0, p3)
  
  	def _qCurveToOne(self, p1, p2):
  		p0 = self._getCurrentPoint()
  		self.value += quadratic_curve_area(p0, p1, p2)
  		self.value += polygon_area(p0, p2)
  
  	def _closePath(self):
  		p0 = self._getCurrentPoint()
  		if p0 != self.__startPoint:
  			self.value += polygon_area(p0, self.__startPoint)
  
subject: remove unused 'interpolate' function; call polygon_area directly in closePath