70 lines
2.8 KiB
Python
70 lines
2.8 KiB
Python
import matplotlib.type1font as t1f
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import os.path
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import difflib
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def test_Type1Font():
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filename = os.path.join(os.path.dirname(__file__), 'cmr10.pfb')
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font = t1f.Type1Font(filename)
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slanted = font.transform({'slant': 1})
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condensed = font.transform({'extend': 0.5})
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with open(filename, 'rb') as fd:
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rawdata = fd.read()
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assert font.parts[0] == rawdata[0x0006:0x10c5]
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assert font.parts[1] == rawdata[0x10cb:0x897f]
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assert font.parts[2] == rawdata[0x8985:0x8ba6]
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assert font.parts[1:] == slanted.parts[1:]
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assert font.parts[1:] == condensed.parts[1:]
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differ = difflib.Differ()
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diff = list(differ.compare(
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font.parts[0].decode('latin-1').splitlines(),
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slanted.parts[0].decode('latin-1').splitlines()))
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for line in (
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# Removes UniqueID
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'- FontDirectory/CMR10 known{/CMR10 findfont dup/UniqueID known{dup',
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'+ FontDirectory/CMR10 known{/CMR10 findfont dup',
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# Changes the font name
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'- /FontName /CMR10 def',
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'+ /FontName /CMR10_Slant_1000 def',
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# Alters FontMatrix
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'- /FontMatrix [0.001 0 0 0.001 0 0 ]readonly def',
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'+ /FontMatrix [0.001 0 0.001 0.001 0 0]readonly def',
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# Alters ItalicAngle
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'- /ItalicAngle 0 def',
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'+ /ItalicAngle -45.0 def'):
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assert line in diff, 'diff to slanted font must contain %s' % line
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diff = list(differ.compare(
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font.parts[0].decode('latin-1').splitlines(),
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condensed.parts[0].decode('latin-1').splitlines()))
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for line in (
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# Removes UniqueID
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'- FontDirectory/CMR10 known{/CMR10 findfont dup/UniqueID known{dup',
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'+ FontDirectory/CMR10 known{/CMR10 findfont dup',
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# Changes the font name
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'- /FontName /CMR10 def',
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'+ /FontName /CMR10_Extend_500 def',
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# Alters FontMatrix
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'- /FontMatrix [0.001 0 0 0.001 0 0 ]readonly def',
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'+ /FontMatrix [0.0005 0 0 0.001 0 0]readonly def'):
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assert line in diff, 'diff to condensed font must contain %s' % line
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def test_overprecision():
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# We used to output too many digits in FontMatrix entries and
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# ItalicAngle, which could make Type-1 parsers unhappy.
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filename = os.path.join(os.path.dirname(__file__), 'cmr10.pfb')
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font = t1f.Type1Font(filename)
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slanted = font.transform({'slant': .167})
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lines = slanted.parts[0].decode('ascii').splitlines()
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matrix, = [line[line.index('[')+1:line.index(']')]
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for line in lines if '/FontMatrix' in line]
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angle, = [word
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for line in lines if '/ItalicAngle' in line
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for word in line.split() if word[0] in '-0123456789']
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# the following used to include 0.00016700000000000002
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assert matrix == '0.001 0 0.000167 0.001 0 0'
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# and here we had -9.48090361795083
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assert angle == '-9.4809'
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