from __future__ import print_function, division, absolute_import
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from fontTools.cffLib import PrivateDict
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from fontTools.cffLib.specializer import stringToProgram
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from fontTools.misc.psCharStrings import T2CharString, encodeFloat, read_realNumber
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import unittest
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class T2CharStringTest(unittest.TestCase):
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@classmethod
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def stringToT2CharString(cls, string):
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return T2CharString(program=stringToProgram(string), private=PrivateDict())
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def test_calcBounds_empty(self):
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cs = self.stringToT2CharString("endchar")
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bounds = cs.calcBounds(None)
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self.assertEqual(bounds, None)
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def test_calcBounds_line(self):
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cs = self.stringToT2CharString("100 100 rmoveto 40 10 rlineto -20 50 rlineto endchar")
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bounds = cs.calcBounds(None)
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self.assertEqual(bounds, (100, 100, 140, 160))
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def test_calcBounds_curve(self):
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cs = self.stringToT2CharString("100 100 rmoveto -50 -150 200 0 -50 150 rrcurveto endchar")
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bounds = cs.calcBounds(None)
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self.assertEqual(bounds, (91.90524980688875, -12.5, 208.09475019311125, 100))
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def test_charstring_bytecode_optimization(self):
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cs = self.stringToT2CharString(
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"100.0 100 rmoveto -50.0 -150 200.5 0.0 -50 150 rrcurveto endchar")
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cs.isCFF2 = False
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cs.private._isCFF2 = False
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cs.compile()
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cs.decompile()
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self.assertEqual(
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cs.program, [100, 100, 'rmoveto', -50, -150, 200.5, 0, -50, 150,
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'rrcurveto', 'endchar'])
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cs2 = self.stringToT2CharString(
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"100.0 rmoveto -50.0 -150 200.5 0.0 -50 150 rrcurveto")
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cs2.isCFF2 = True
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cs2.private._isCFF2 = True
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cs2.compile(isCFF2=True)
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cs2.decompile()
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self.assertEqual(
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cs2.program, [100, 'rmoveto', -50, -150, 200.5, 0, -50, 150,
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'rrcurveto'])
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def test_encodeFloat(self):
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import sys
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def hexenc(s):
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return ' '.join('%02x' % ord(x) for x in s)
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if sys.version_info[0] >= 3:
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def hexenc_py3(s):
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return ' '.join('%02x' % x for x in s)
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hexenc = hexenc_py3
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testNums = [
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# value expected result
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(-9.399999999999999, '1e e9 a4 ff'), # -9.4
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(9.399999999999999999, '1e 9a 4f'), # 9.4
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(456.8, '1e 45 6a 8f'), # 456.8
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(0.0, '1e 0f'), # 0
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(-0.0, '1e 0f'), # 0
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(1.0, '1e 1f'), # 1
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(-1.0, '1e e1 ff'), # -1
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(98765.37e2, '1e 98 76 53 7f'), # 9876537
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(1234567890.0, '1e 1a 23 45 67 9b 09 ff'), # 1234567890
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(9.876537e-4, '1e a0 00 98 76 53 7f'), # 9.876537e-24
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(9.876537e+4, '1e 98 76 5a 37 ff'), # 9.876537e+24
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]
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for sample in testNums:
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encoded_result = encodeFloat(sample[0])
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# check to see if we got the expected bytes
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self.assertEqual(hexenc(encoded_result), sample[1])
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# check to see if we get the same value by decoding the data
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decoded_result = read_realNumber(
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None,
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None,
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encoded_result,
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1,
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)
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self.assertEqual(decoded_result[0], float('%.8g' % sample[0]))
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# We limit to 8 digits of precision to match the implementation
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# of encodeFloat.
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if __name__ == "__main__":
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import sys
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sys.exit(unittest.main())
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