from fontTools.misc.loggingTools import CapturingLogHandler from fontTools.misc.testTools import parseXML from fontTools.misc.textTools import deHexStr, hexStr from fontTools.misc.xmlWriter import XMLWriter from fontTools.ttLib.tables.TupleVariation import ( log, TupleVariation, compileSharedTuples, decompileSharedTuples, compileTupleVariationStore, decompileTupleVariationStore, inferRegion_, ) from io import BytesIO import random import unittest def hexencode(s): h = hexStr(s).upper() return " ".join([h[i : i + 2] for i in range(0, len(h), 2)]) AXES = { "wdth": (0.25, 0.375, 0.5), "wght": (0.0, 1.0, 1.0), "opsz": (-0.75, -0.75, 0.0), } # Shared tuples in the 'gvar' table of the Skia font, as printed # in Apple's TrueType specification. # https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6gvar.html SKIA_GVAR_SHARED_TUPLES_DATA = deHexStr( "40 00 00 00 C0 00 00 00 00 00 40 00 00 00 C0 00 " "C0 00 C0 00 40 00 C0 00 40 00 40 00 C0 00 40 00" ) SKIA_GVAR_SHARED_TUPLES = [ {"wght": 1.0, "wdth": 0.0}, {"wght": -1.0, "wdth": 0.0}, {"wght": 0.0, "wdth": 1.0}, {"wght": 0.0, "wdth": -1.0}, {"wght": -1.0, "wdth": -1.0}, {"wght": 1.0, "wdth": -1.0}, {"wght": 1.0, "wdth": 1.0}, {"wght": -1.0, "wdth": 1.0}, ] # Tuple Variation Store of uppercase I in the Skia font, as printed in Apple's # TrueType spec. The actual Skia font uses a different table for uppercase I # than what is printed in Apple's spec, but we still want to make sure that # we can parse the data as it appears in the specification. # https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6gvar.html SKIA_GVAR_I_DATA = deHexStr( "00 08 00 24 00 33 20 00 00 15 20 01 00 1B 20 02 " "00 24 20 03 00 15 20 04 00 26 20 07 00 0D 20 06 " "00 1A 20 05 00 40 01 01 01 81 80 43 FF 7E FF 7E " "FF 7E FF 7E 00 81 45 01 01 01 03 01 04 01 04 01 " "04 01 02 80 40 00 82 81 81 04 3A 5A 3E 43 20 81 " "04 0E 40 15 45 7C 83 00 0D 9E F3 F2 F0 F0 F0 F0 " "F3 9E A0 A1 A1 A1 9F 80 00 91 81 91 00 0D 0A 0A " "09 0A 0A 0A 0A 0A 0A 0A 0A 0A 0A 0B 80 00 15 81 " "81 00 C4 89 00 C4 83 00 0D 80 99 98 96 96 96 96 " "99 80 82 83 83 83 81 80 40 FF 18 81 81 04 E6 F9 " "10 21 02 81 04 E8 E5 EB 4D DA 83 00 0D CE D3 D4 " "D3 D3 D3 D5 D2 CE CC CD CD CD CD 80 00 A1 81 91 " "00 0D 07 03 04 02 02 02 03 03 07 07 08 08 08 07 " "80 00 09 81 81 00 28 40 00 A4 02 24 24 66 81 04 " "08 FA FA FA 28 83 00 82 02 FF FF FF 83 02 01 01 " "01 84 91 00 80 06 07 08 08 08 08 0A 07 80 03 FE " "FF FF FF 81 00 08 81 82 02 EE EE EE 8B 6D 00" ) class TupleVariationTest(unittest.TestCase): def __init__(self, methodName): unittest.TestCase.__init__(self, methodName) # Python 3 renamed assertRaisesRegexp to assertRaisesRegex, # and fires deprecation warnings if a program uses the old name. if not hasattr(self, "assertRaisesRegex"): self.assertRaisesRegex = self.assertRaisesRegexp def test_equal(self): var1 = TupleVariation({"wght": (0.0, 1.0, 1.0)}, [(0, 0), (9, 8), (7, 6)]) var2 = TupleVariation({"wght": (0.0, 1.0, 1.0)}, [(0, 0), (9, 8), (7, 6)]) self.assertEqual(var1, var2) def test_equal_differentAxes(self): var1 = TupleVariation({"wght": (0.0, 1.0, 1.0)}, [(0, 0), (9, 8), (7, 6)]) var2 = TupleVariation({"wght": (0.7, 0.8, 0.9)}, [(0, 0), (9, 8), (7, 6)]) self.assertNotEqual(var1, var2) def test_equal_differentCoordinates(self): var1 = TupleVariation({"wght": (0.0, 1.0, 1.0)}, [(0, 0), (9, 8), (7, 6)]) var2 = TupleVariation({"wght": (0.0, 1.0, 1.0)}, [(0, 0), (9, 8)]) self.assertNotEqual(var1, var2) def test_hasImpact_someDeltasNotZero(self): axes = {"wght": (0.0, 1.0, 1.0)} var = TupleVariation(axes, [(0, 0), (9, 8), (7, 6)]) self.assertTrue(var.hasImpact()) def test_hasImpact_allDeltasZero(self): axes = {"wght": (0.0, 1.0, 1.0)} var = TupleVariation(axes, [(0, 0), (0, 0), (0, 0)]) self.assertTrue(var.hasImpact()) def test_hasImpact_allDeltasNone(self): axes = {"wght": (0.0, 1.0, 1.0)} var = TupleVariation(axes, [None, None, None]) self.assertFalse(var.hasImpact()) def test_toXML_badDeltaFormat(self): writer = XMLWriter(BytesIO()) g = TupleVariation(AXES, ["String"]) with CapturingLogHandler(log, "ERROR") as captor: g.toXML(writer, ["wdth"]) self.assertIn("bad delta format", [r.msg for r in captor.records]) self.assertEqual( [ "", '', "", "", ], TupleVariationTest.xml_lines(writer), ) def test_toXML_constants(self): writer = XMLWriter(BytesIO()) g = TupleVariation(AXES, [42, None, 23, 0, -17, None]) g.toXML(writer, ["wdth", "wght", "opsz"]) self.assertEqual( [ "", '', '', '', '', '', '', '', "", ], TupleVariationTest.xml_lines(writer), ) def test_toXML_points(self): writer = XMLWriter(BytesIO()) g = TupleVariation(AXES, [(9, 8), None, (7, 6), (0, 0), (-1, -2), None]) g.toXML(writer, ["wdth", "wght", "opsz"]) self.assertEqual( [ "", '', '', '', '', '', '', '', "", ], TupleVariationTest.xml_lines(writer), ) def test_toXML_allDeltasNone(self): writer = XMLWriter(BytesIO()) axes = {"wght": (0.0, 1.0, 1.0)} g = TupleVariation(axes, [None] * 5) g.toXML(writer, ["wght", "wdth"]) self.assertEqual( [ "", '', "", "", ], TupleVariationTest.xml_lines(writer), ) def test_toXML_axes_floats(self): writer = XMLWriter(BytesIO()) axes = { "wght": (0.0, 0.2999878, 0.7000122), "wdth": (0.0, 0.4000244, 0.4000244), } g = TupleVariation(axes, [None] * 5) g.toXML(writer, ["wght", "wdth"]) self.assertEqual( [ '', '', ], TupleVariationTest.xml_lines(writer)[1:3], ) def test_fromXML_badDeltaFormat(self): g = TupleVariation({}, []) with CapturingLogHandler(log, "WARNING") as captor: for name, attrs, content in parseXML(''): g.fromXML(name, attrs, content) self.assertIn("bad delta format: a, b", [r.msg for r in captor.records]) def test_fromXML_constants(self): g = TupleVariation({}, [None] * 4) for name, attrs, content in parseXML( '' '' '' '' '' ): g.fromXML(name, attrs, content) self.assertEqual(AXES, g.axes) self.assertEqual([None, 42, -23, None], g.coordinates) def test_fromXML_points(self): g = TupleVariation({}, [None] * 4) for name, attrs, content in parseXML( '' '' '' '' '' ): g.fromXML(name, attrs, content) self.assertEqual(AXES, g.axes) self.assertEqual([None, (33, 44), (-2, 170), None], g.coordinates) def test_fromXML_axes_floats(self): g = TupleVariation({}, [None] * 4) for name, attrs, content in parseXML( '' '' ): g.fromXML(name, attrs, content) self.assertEqual(g.axes["wght"][0], 0) self.assertAlmostEqual(g.axes["wght"][1], 0.2999878) self.assertAlmostEqual(g.axes["wght"][2], 0.7000122) self.assertEqual(g.axes["wdth"][0], 0) self.assertAlmostEqual(g.axes["wdth"][1], 0.4000244) self.assertAlmostEqual(g.axes["wdth"][2], 0.4000244) def test_compile_sharedPeaks_nonIntermediate_sharedPoints(self): var = TupleVariation( {"wght": (0.0, 0.5, 0.5), "wdth": (0.0, 0.8, 0.8)}, [(7, 4), (8, 5), (9, 6)] ) axisTags = ["wght", "wdth"] sharedPeakIndices = {var.compileCoord(axisTags): 0x77} tup, deltas = var.compile(axisTags, sharedPeakIndices, pointData=b"") # len(deltas)=8; flags=None; tupleIndex=0x77 # embeddedPeaks=[]; intermediateCoord=[] self.assertEqual("00 08 00 77", hexencode(tup)) self.assertEqual( "02 07 08 09 " "02 04 05 06", # deltaX: [7, 8, 9] # deltaY: [4, 5, 6] hexencode(deltas), ) def test_compile_sharedPeaks_intermediate_sharedPoints(self): var = TupleVariation( {"wght": (0.3, 0.5, 0.7), "wdth": (0.1, 0.8, 0.9)}, [(7, 4), (8, 5), (9, 6)] ) axisTags = ["wght", "wdth"] sharedPeakIndices = {var.compileCoord(axisTags): 0x77} tup, deltas = var.compile(axisTags, sharedPeakIndices, pointData=b"") # len(deltas)=8; flags=INTERMEDIATE_REGION; tupleIndex=0x77 # embeddedPeak=[]; intermediateCoord=[(0.3, 0.1), (0.7, 0.9)] self.assertEqual("00 08 40 77 13 33 06 66 2C CD 39 9A", hexencode(tup)) self.assertEqual( "02 07 08 09 " "02 04 05 06", # deltaX: [7, 8, 9] # deltaY: [4, 5, 6] hexencode(deltas), ) def test_compile_sharedPeaks_nonIntermediate_privatePoints(self): var = TupleVariation( {"wght": (0.0, 0.5, 0.5), "wdth": (0.0, 0.8, 0.8)}, [(7, 4), (8, 5), (9, 6)] ) axisTags = ["wght", "wdth"] sharedPeakIndices = {var.compileCoord(axisTags): 0x77} tup, deltas = var.compile(axisTags, sharedPeakIndices) # len(deltas)=9; flags=PRIVATE_POINT_NUMBERS; tupleIndex=0x77 # embeddedPeak=[]; intermediateCoord=[] self.assertEqual("00 09 20 77", hexencode(tup)) self.assertEqual( "00 " # all points in glyph "02 07 08 09 " # deltaX: [7, 8, 9] "02 04 05 06", # deltaY: [4, 5, 6] hexencode(deltas), ) def test_compile_sharedPeaks_intermediate_privatePoints(self): var = TupleVariation( {"wght": (0.0, 0.5, 1.0), "wdth": (0.0, 0.8, 1.0)}, [(7, 4), (8, 5), (9, 6)] ) axisTags = ["wght", "wdth"] sharedPeakIndices = {var.compileCoord(axisTags): 0x77} tuple, deltas = var.compile(axisTags, sharedPeakIndices) # len(deltas)=9; flags=PRIVATE_POINT_NUMBERS; tupleIndex=0x77 # embeddedPeak=[]; intermediateCoord=[(0.0, 0.0), (1.0, 1.0)] self.assertEqual("00 09 60 77 00 00 00 00 40 00 40 00", hexencode(tuple)) self.assertEqual( "00 " # all points in glyph "02 07 08 09 " # deltaX: [7, 8, 9] "02 04 05 06", # deltaY: [4, 5, 6] hexencode(deltas), ) def test_compile_embeddedPeak_nonIntermediate_sharedPoints(self): var = TupleVariation( {"wght": (0.0, 0.5, 0.5), "wdth": (0.0, 0.8, 0.8)}, [(7, 4), (8, 5), (9, 6)] ) tup, deltas = var.compile(axisTags=["wght", "wdth"], pointData=b"") # len(deltas)=8; flags=EMBEDDED_PEAK_TUPLE # embeddedPeak=[(0.5, 0.8)]; intermediateCoord=[] self.assertEqual("00 08 80 00 20 00 33 33", hexencode(tup)) self.assertEqual( "02 07 08 09 " "02 04 05 06", # deltaX: [7, 8, 9] # deltaY: [4, 5, 6] hexencode(deltas), ) def test_compile_embeddedPeak_nonIntermediate_sharedConstants(self): var = TupleVariation( {"wght": (0.0, 0.5, 0.5), "wdth": (0.0, 0.8, 0.8)}, [3, 1, 4] ) tup, deltas = var.compile(axisTags=["wght", "wdth"], pointData=b"") # len(deltas)=4; flags=EMBEDDED_PEAK_TUPLE # embeddedPeak=[(0.5, 0.8)]; intermediateCoord=[] self.assertEqual("00 04 80 00 20 00 33 33", hexencode(tup)) self.assertEqual("02 03 01 04", hexencode(deltas)) # delta: [3, 1, 4] def test_compile_embeddedPeak_intermediate_sharedPoints(self): var = TupleVariation( {"wght": (0.0, 0.5, 1.0), "wdth": (0.0, 0.8, 0.8)}, [(7, 4), (8, 5), (9, 6)] ) tup, deltas = var.compile(axisTags=["wght", "wdth"], pointData=b"") # len(deltas)=8; flags=EMBEDDED_PEAK_TUPLE # embeddedPeak=[(0.5, 0.8)]; intermediateCoord=[(0.0, 0.0), (1.0, 0.8)] self.assertEqual( "00 08 C0 00 20 00 33 33 00 00 00 00 40 00 33 33", hexencode(tup) ) self.assertEqual( "02 07 08 09 " "02 04 05 06", # deltaX: [7, 8, 9] # deltaY: [4, 5, 6] hexencode(deltas), ) def test_compile_embeddedPeak_nonIntermediate_privatePoints(self): var = TupleVariation( {"wght": (0.0, 0.5, 0.5), "wdth": (0.0, 0.8, 0.8)}, [(7, 4), (8, 5), (9, 6)] ) tup, deltas = var.compile(axisTags=["wght", "wdth"]) # len(deltas)=9; flags=PRIVATE_POINT_NUMBERS|EMBEDDED_PEAK_TUPLE # embeddedPeak=[(0.5, 0.8)]; intermediateCoord=[] self.assertEqual("00 09 A0 00 20 00 33 33", hexencode(tup)) self.assertEqual( "00 " # all points in glyph "02 07 08 09 " # deltaX: [7, 8, 9] "02 04 05 06", # deltaY: [4, 5, 6] hexencode(deltas), ) def test_compile_embeddedPeak_nonIntermediate_privateConstants(self): var = TupleVariation( {"wght": (0.0, 0.5, 0.5), "wdth": (0.0, 0.8, 0.8)}, [7, 8, 9] ) tup, deltas = var.compile(axisTags=["wght", "wdth"]) # len(deltas)=5; flags=PRIVATE_POINT_NUMBERS|EMBEDDED_PEAK_TUPLE # embeddedPeak=[(0.5, 0.8)]; intermediateCoord=[] self.assertEqual("00 05 A0 00 20 00 33 33", hexencode(tup)) self.assertEqual( "00 " "02 07 08 09", # all points in glyph # delta: [7, 8, 9] hexencode(deltas), ) def test_compile_embeddedPeak_intermediate_privatePoints(self): var = TupleVariation( {"wght": (0.4, 0.5, 0.6), "wdth": (0.7, 0.8, 0.9)}, [(7, 4), (8, 5), (9, 6)] ) tup, deltas = var.compile(axisTags=["wght", "wdth"]) # len(deltas)=9; # flags=PRIVATE_POINT_NUMBERS|INTERMEDIATE_REGION|EMBEDDED_PEAK_TUPLE # embeddedPeak=(0.5, 0.8); intermediateCoord=[(0.4, 0.7), (0.6, 0.9)] self.assertEqual( "00 09 E0 00 20 00 33 33 19 9A 2C CD 26 66 39 9A", hexencode(tup) ) self.assertEqual( "00 " # all points in glyph "02 07 08 09 " # deltaX: [7, 8, 9] "02 04 05 06", # deltaY: [4, 5, 6] hexencode(deltas), ) def test_compile_embeddedPeak_intermediate_privateConstants(self): var = TupleVariation( {"wght": (0.4, 0.5, 0.6), "wdth": (0.7, 0.8, 0.9)}, [7, 8, 9] ) tup, deltas = var.compile(axisTags=["wght", "wdth"]) # len(deltas)=5; # flags=PRIVATE_POINT_NUMBERS|INTERMEDIATE_REGION|EMBEDDED_PEAK_TUPLE # embeddedPeak=(0.5, 0.8); intermediateCoord=[(0.4, 0.7), (0.6, 0.9)] self.assertEqual( "00 05 E0 00 20 00 33 33 19 9A 2C CD 26 66 39 9A", hexencode(tup) ) self.assertEqual( "00 " "02 07 08 09", # all points in glyph # delta: [7, 8, 9] hexencode(deltas), ) def test_compileCoord(self): var = TupleVariation( {"wght": (-1.0, -1.0, -1.0), "wdth": (0.4, 0.5, 0.6)}, [None] * 4 ) self.assertEqual("C0 00 20 00", hexencode(var.compileCoord(["wght", "wdth"]))) self.assertEqual("20 00 C0 00", hexencode(var.compileCoord(["wdth", "wght"]))) self.assertEqual("C0 00", hexencode(var.compileCoord(["wght"]))) def test_compileIntermediateCoord(self): var = TupleVariation( {"wght": (-1.0, -1.0, 0.0), "wdth": (0.4, 0.5, 0.6)}, [None] * 4 ) self.assertEqual( "C0 00 19 9A 00 00 26 66", hexencode(var.compileIntermediateCoord(["wght", "wdth"])), ) self.assertEqual( "19 9A C0 00 26 66 00 00", hexencode(var.compileIntermediateCoord(["wdth", "wght"])), ) self.assertEqual(None, var.compileIntermediateCoord(["wght"])) self.assertEqual( "19 9A 26 66", hexencode(var.compileIntermediateCoord(["wdth"])) ) def test_decompileCoord(self): decompileCoord = TupleVariation.decompileCoord_ data = deHexStr("DE AD C0 00 20 00 DE AD") self.assertEqual( ({"wght": -1.0, "wdth": 0.5}, 6), decompileCoord(["wght", "wdth"], data, 2) ) def test_decompileCoord_roundTrip(self): # Make sure we are not affected by https://github.com/fonttools/fonttools/issues/286 data = deHexStr("7F B9 80 35") values, _ = TupleVariation.decompileCoord_(["wght", "wdth"], data, 0) axisValues = {axis: (val, val, val) for axis, val in values.items()} var = TupleVariation(axisValues, [None] * 4) self.assertEqual("7F B9 80 35", hexencode(var.compileCoord(["wght", "wdth"]))) def test_compilePoints(self): compilePoints = lambda p: TupleVariation.compilePoints(set(p)) self.assertEqual("00", hexencode(compilePoints(set()))) # all points in glyph self.assertEqual("01 00 07", hexencode(compilePoints([7]))) self.assertEqual("01 80 FF FF", hexencode(compilePoints([65535]))) self.assertEqual("02 01 09 06", hexencode(compilePoints([9, 15]))) self.assertEqual( "06 05 07 01 F7 02 01 F2", hexencode(compilePoints([7, 8, 255, 257, 258, 500])), ) self.assertEqual("03 01 07 01 80 01 EC", hexencode(compilePoints([7, 8, 500]))) self.assertEqual( "04 01 07 01 81 BE E7 0C 0F", hexencode(compilePoints([7, 8, 0xBEEF, 0xCAFE])), ) self.maxDiff = None self.assertEqual( "81 2C" + " 7F 00" # 300 points (0x12c) in total + (127 * " 01") + " 7F" # first run, contains 128 points: [0 .. 127] + (128 * " 01") + " 2B" # second run, contains 128 points: [128 .. 255] + (44 * " 01"), # third run, contains 44 points: [256 .. 299] hexencode(compilePoints(range(300))), ) self.assertEqual( "81 8F" + " 7F 00" # 399 points (0x18f) in total + (127 * " 01") + " 7F" # first run, contains 128 points: [0 .. 127] + (128 * " 01") + " 7F" # second run, contains 128 points: [128 .. 255] + (128 * " 01") + " 0E" # third run, contains 128 points: [256 .. 383] + (15 * " 01"), # fourth run, contains 15 points: [384 .. 398] hexencode(compilePoints(range(399))), ) def test_decompilePoints(self): numPointsInGlyph = 65536 allPoints = list(range(numPointsInGlyph)) def decompilePoints(data, offset): points, offset = TupleVariation.decompilePoints_( numPointsInGlyph, deHexStr(data), offset, "gvar" ) # Conversion to list needed for Python 3. return (list(points), offset) # all points in glyph self.assertEqual((allPoints, 1), decompilePoints("00", 0)) # all points in glyph (in overly verbose encoding, not explicitly prohibited by spec) self.assertEqual((allPoints, 2), decompilePoints("80 00", 0)) # 2 points; first run: [9, 9+6] self.assertEqual(([9, 15], 4), decompilePoints("02 01 09 06", 0)) # 2 points; first run: [0xBEEF, 0xCAFE]. (0x0C0F = 0xCAFE - 0xBEEF) self.assertEqual(([0xBEEF, 0xCAFE], 6), decompilePoints("02 81 BE EF 0C 0F", 0)) # 1 point; first run: [7] self.assertEqual(([7], 3), decompilePoints("01 00 07", 0)) # 1 point; first run: [7] in overly verbose encoding self.assertEqual(([7], 4), decompilePoints("01 80 00 07", 0)) # 1 point; first run: [65535]; requires words to be treated as unsigned numbers self.assertEqual(([65535], 4), decompilePoints("01 80 FF FF", 0)) # 4 points; first run: [7, 8]; second run: [255, 257]. 257 is stored in delta-encoded bytes (0xFF + 2). self.assertEqual( ([7, 8, 263, 265], 7), decompilePoints("04 01 07 01 01 FF 02", 0) ) # combination of all encodings, preceded and followed by 4 bytes of unused data data = "DE AD DE AD 04 01 07 01 81 BE E7 0C 0F DE AD DE AD" self.assertEqual(([7, 8, 0xBEEF, 0xCAFE], 13), decompilePoints(data, 4)) self.assertSetEqual( set(range(300)), set( decompilePoints( "81 2C" + " 7F 00" # 300 points (0x12c) in total + (127 * " 01") + " 7F" # first run, contains 128 points: [0 .. 127] + (128 * " 01") + " AB" # second run, contains 128 points: [128 .. 255] + (44 * " 00 01"), # third run, contains 44 points: [256 .. 299] 0, )[0] ), ) self.assertSetEqual( set(range(399)), set( decompilePoints( "81 8F" + " 7F 00" # 399 points (0x18f) in total + (127 * " 01") + " 7F" # first run, contains 128 points: [0 .. 127] + (128 * " 01") + " FF" # second run, contains 128 points: [128 .. 255] + (128 * " 00 01") + " 8E" # third run, contains 128 points: [256 .. 383] + (15 * " 00 01"), # fourth run, contains 15 points: [384 .. 398] 0, )[0] ), ) def test_decompilePoints_shouldAcceptBadPointNumbers(self): decompilePoints = TupleVariation.decompilePoints_ # 2 points; first run: [3, 9]. numPointsInGlyph = 8 with CapturingLogHandler(log, "WARNING") as captor: decompilePoints(numPointsInGlyph, deHexStr("02 01 03 06"), 0, "cvar") self.assertIn( "point 9 out of range in 'cvar' table", [r.msg for r in captor.records] ) def test_decompilePoints_roundTrip(self): numPointsInGlyph = ( 500 # greater than 255, so we also exercise code path for 16-bit encoding ) compile = lambda points: TupleVariation.compilePoints(points) decompile = lambda data: set( TupleVariation.decompilePoints_(numPointsInGlyph, data, 0, "gvar")[0] ) for i in range(50): points = set(random.sample(range(numPointsInGlyph), 30)) self.assertSetEqual( points, decompile(compile(points)), "failed round-trip decompile/compilePoints; points=%s" % points, ) allPoints = set(range(numPointsInGlyph)) self.assertSetEqual(allPoints, decompile(compile(allPoints))) self.assertSetEqual(allPoints, decompile(compile(set()))) def test_compileDeltas_points(self): var = TupleVariation({}, [None, (1, 0), (2, 0), None, (4, 0), None]) # deltaX for points: [1, 2, 4]; deltaY for points: [0, 0, 0] self.assertEqual("02 01 02 04 82", hexencode(var.compileDeltas())) def test_compileDeltas_constants(self): var = TupleVariation({}, [None, 1, 2, None, 4, None]) # delta for cvts: [1, 2, 4] self.assertEqual("02 01 02 04", hexencode(var.compileDeltas())) def test_compileDeltaValues(self): compileDeltaValues = lambda values: hexencode( TupleVariation.compileDeltaValues_(values) ) # zeroes self.assertEqual("80", compileDeltaValues([0])) self.assertEqual("BF", compileDeltaValues([0] * 64)) self.assertEqual("BF 80", compileDeltaValues([0] * 65)) self.assertEqual("BF A3", compileDeltaValues([0] * 100)) self.assertEqual("BF BF BF BF", compileDeltaValues([0] * 256)) # bytes self.assertEqual("00 01", compileDeltaValues([1])) self.assertEqual( "06 01 02 03 7F 80 FF FE", compileDeltaValues([1, 2, 3, 127, -128, -1, -2]) ) self.assertEqual("3F" + (64 * " 7F"), compileDeltaValues([127] * 64)) self.assertEqual("3F" + (64 * " 7F") + " 00 7F", compileDeltaValues([127] * 65)) # words self.assertEqual("40 66 66", compileDeltaValues([0x6666])) self.assertEqual( "43 66 66 7F FF FF FF 80 00", compileDeltaValues([0x6666, 32767, -1, -32768]), ) self.assertEqual("7F" + (64 * " 11 22"), compileDeltaValues([0x1122] * 64)) self.assertEqual( "7F" + (64 * " 11 22") + " 40 11 22", compileDeltaValues([0x1122] * 65) ) # bytes, zeroes, bytes: a single zero is more compact when encoded as part of the bytes run self.assertEqual( "04 7F 7F 00 7F 7F", compileDeltaValues([127, 127, 0, 127, 127]) ) self.assertEqual( "01 7F 7F 81 01 7F 7F", compileDeltaValues([127, 127, 0, 0, 127, 127]) ) self.assertEqual( "01 7F 7F 82 01 7F 7F", compileDeltaValues([127, 127, 0, 0, 0, 127, 127]) ) self.assertEqual( "01 7F 7F 83 01 7F 7F", compileDeltaValues([127, 127, 0, 0, 0, 0, 127, 127]) ) # bytes, zeroes self.assertEqual("01 01 00", compileDeltaValues([1, 0])) self.assertEqual("00 01 81", compileDeltaValues([1, 0, 0])) # words, bytes, words: a single byte is more compact when encoded as part of the words run self.assertEqual( "42 66 66 00 02 77 77", compileDeltaValues([0x6666, 2, 0x7777]) ) self.assertEqual( "40 66 66 01 02 02 40 77 77", compileDeltaValues([0x6666, 2, 2, 0x7777]) ) # words, zeroes, words self.assertEqual( "40 66 66 80 40 77 77", compileDeltaValues([0x6666, 0, 0x7777]) ) self.assertEqual( "40 66 66 81 40 77 77", compileDeltaValues([0x6666, 0, 0, 0x7777]) ) self.assertEqual( "40 66 66 82 40 77 77", compileDeltaValues([0x6666, 0, 0, 0, 0x7777]) ) # words, zeroes, bytes self.assertEqual( "40 66 66 80 02 01 02 03", compileDeltaValues([0x6666, 0, 1, 2, 3]) ) self.assertEqual( "40 66 66 81 02 01 02 03", compileDeltaValues([0x6666, 0, 0, 1, 2, 3]) ) self.assertEqual( "40 66 66 82 02 01 02 03", compileDeltaValues([0x6666, 0, 0, 0, 1, 2, 3]) ) # words, zeroes self.assertEqual("40 66 66 80", compileDeltaValues([0x6666, 0])) self.assertEqual("40 66 66 81", compileDeltaValues([0x6666, 0, 0])) def test_decompileDeltas(self): decompileDeltas = TupleVariation.decompileDeltas_ # 83 = zero values (0x80), count = 4 (1 + 0x83 & 0x3F) self.assertEqual(([0, 0, 0, 0], 1), decompileDeltas(4, deHexStr("83"), 0)) # 41 01 02 FF FF = signed 16-bit values (0x40), count = 2 (1 + 0x41 & 0x3F) self.assertEqual( ([258, -1], 5), decompileDeltas(2, deHexStr("41 01 02 FF FF"), 0) ) # 01 81 07 = signed 8-bit values, count = 2 (1 + 0x01 & 0x3F) self.assertEqual(([-127, 7], 3), decompileDeltas(2, deHexStr("01 81 07"), 0)) # combination of all three encodings, preceded and followed by 4 bytes of unused data data = deHexStr("DE AD BE EF 83 40 01 02 01 81 80 DE AD BE EF") self.assertEqual( ([0, 0, 0, 0, 258, -127, -128], 11), decompileDeltas(7, data, 4) ) def test_decompileDeltas_roundTrip(self): numDeltas = 30 compile = TupleVariation.compileDeltaValues_ decompile = lambda data: TupleVariation.decompileDeltas_(numDeltas, data, 0)[0] for i in range(50): deltas = random.sample(range(-128, 127), 10) deltas.extend(random.sample(range(-32768, 32767), 10)) deltas.extend([0] * 10) random.shuffle(deltas) self.assertListEqual(deltas, decompile(compile(deltas))) def test_compileSharedTuples(self): # Below, the peak coordinate {"wght": 1.0, "wdth": 0.8} appears # three times (most frequent sorted first); {"wght": 1.0, "wdth": 0.5} # and {"wght": 1.0, "wdth": 0.7} both appears two times (tie) and # are sorted alphanumerically to ensure determinism. # The peak coordinate {"wght": 1.0, "wdth": 0.9} appears only once # and is thus ignored. # Because the start and end of variation ranges is not encoded # into the shared pool, they should get ignored. deltas = [None] * 4 variations = [ TupleVariation({"wght": (1.0, 1.0, 1.0), "wdth": (0.5, 0.7, 1.0)}, deltas), TupleVariation({"wght": (1.0, 1.0, 1.0), "wdth": (0.2, 0.7, 1.0)}, deltas), TupleVariation({"wght": (1.0, 1.0, 1.0), "wdth": (0.2, 0.8, 1.0)}, deltas), TupleVariation({"wght": (1.0, 1.0, 1.0), "wdth": (0.3, 0.5, 1.0)}, deltas), TupleVariation({"wght": (1.0, 1.0, 1.0), "wdth": (0.3, 0.8, 1.0)}, deltas), TupleVariation({"wght": (1.0, 1.0, 1.0), "wdth": (0.3, 0.9, 1.0)}, deltas), TupleVariation({"wght": (1.0, 1.0, 1.0), "wdth": (0.4, 0.8, 1.0)}, deltas), TupleVariation({"wght": (1.0, 1.0, 1.0), "wdth": (0.5, 0.5, 1.0)}, deltas), ] result = compileSharedTuples(["wght", "wdth"], variations) self.assertEqual( [hexencode(c) for c in result], ["40 00 33 33", "40 00 20 00", "40 00 2C CD"], ) def test_decompileSharedTuples_Skia(self): sharedTuples = decompileSharedTuples( axisTags=["wght", "wdth"], sharedTupleCount=8, data=SKIA_GVAR_SHARED_TUPLES_DATA, offset=0, ) self.assertEqual(sharedTuples, SKIA_GVAR_SHARED_TUPLES) def test_decompileSharedTuples_empty(self): self.assertEqual(decompileSharedTuples(["wght"], 0, b"", 0), []) def test_compileTupleVariationStore_allVariationsRedundant(self): axes = {"wght": (0.3, 0.4, 0.5), "opsz": (0.7, 0.8, 0.9)} variations = [ TupleVariation(axes, [None] * 4), TupleVariation(axes, [None] * 4), TupleVariation(axes, [None] * 4), ] self.assertEqual( compileTupleVariationStore( variations, pointCount=8, axisTags=["wght", "opsz"], sharedTupleIndices={}, ), (0, b"", b""), ) def test_compileTupleVariationStore_noVariations(self): self.assertEqual( compileTupleVariationStore( variations=[], pointCount=8, axisTags=["wght", "opsz"], sharedTupleIndices={}, ), (0, b"", b""), ) def test_compileTupleVariationStore_roundTrip_cvar(self): deltas = [1, 2, 3, 4] variations = [ TupleVariation({"wght": (0.5, 1.0, 1.0), "wdth": (1.0, 1.0, 1.0)}, deltas), TupleVariation({"wght": (1.0, 1.0, 1.0), "wdth": (1.0, 1.0, 1.0)}, deltas), ] tupleVariationCount, tuples, data = compileTupleVariationStore( variations, pointCount=4, axisTags=["wght", "wdth"], sharedTupleIndices={} ) self.assertEqual( decompileTupleVariationStore( "cvar", ["wght", "wdth"], tupleVariationCount, pointCount=4, sharedTuples={}, data=(tuples + data), pos=0, dataPos=len(tuples), ), variations, ) def test_compileTupleVariationStore_roundTrip_gvar(self): deltas = [(1, 1), (2, 2), (3, 3), (4, 4)] variations = [ TupleVariation({"wght": (0.5, 1.0, 1.0), "wdth": (1.0, 1.0, 1.0)}, deltas), TupleVariation({"wght": (1.0, 1.0, 1.0), "wdth": (1.0, 1.0, 1.0)}, deltas), ] tupleVariationCount, tuples, data = compileTupleVariationStore( variations, pointCount=4, axisTags=["wght", "wdth"], sharedTupleIndices={} ) self.assertEqual( decompileTupleVariationStore( "gvar", ["wght", "wdth"], tupleVariationCount, pointCount=4, sharedTuples={}, data=(tuples + data), pos=0, dataPos=len(tuples), ), variations, ) def test_decompileTupleVariationStore_Skia_I(self): tvar = decompileTupleVariationStore( tableTag="gvar", axisTags=["wght", "wdth"], tupleVariationCount=8, pointCount=18, sharedTuples=SKIA_GVAR_SHARED_TUPLES, data=SKIA_GVAR_I_DATA, pos=4, dataPos=36, ) self.assertEqual(len(tvar), 8) self.assertEqual(tvar[0].axes, {"wght": (0.0, 1.0, 1.0)}) self.assertEqual( " ".join(["%d,%d" % c for c in tvar[0].coordinates]), "257,0 -127,0 -128,58 -130,90 -130,62 -130,67 -130,32 -127,0 " "257,0 259,14 260,64 260,21 260,69 258,124 0,0 130,0 0,0 0,0", ) def test_decompileTupleVariationStore_empty(self): self.assertEqual( decompileTupleVariationStore( tableTag="gvar", axisTags=[], tupleVariationCount=0, pointCount=5, sharedTuples=[], data=b"", pos=4, dataPos=4, ), [], ) def test_getTupleSize(self): getTupleSize = TupleVariation.getTupleSize_ numAxes = 3 self.assertEqual(4 + numAxes * 2, getTupleSize(0x8042, numAxes)) self.assertEqual(4 + numAxes * 4, getTupleSize(0x4077, numAxes)) self.assertEqual(4, getTupleSize(0x2077, numAxes)) self.assertEqual(4, getTupleSize(11, numAxes)) def test_inferRegion(self): start, end = inferRegion_({"wght": -0.3, "wdth": 0.7}) self.assertEqual(start, {"wght": -0.3, "wdth": 0.0}) self.assertEqual(end, {"wght": 0.0, "wdth": 0.7}) @staticmethod def xml_lines(writer): content = writer.file.getvalue().decode("utf-8") return [line.strip() for line in content.splitlines()][1:] def test_getCoordWidth(self): empty = TupleVariation({}, []) self.assertEqual(empty.getCoordWidth(), 0) empty = TupleVariation({}, [None]) self.assertEqual(empty.getCoordWidth(), 0) gvarTuple = TupleVariation({}, [None, (0, 0)]) self.assertEqual(gvarTuple.getCoordWidth(), 2) cvarTuple = TupleVariation({}, [None, 0]) self.assertEqual(cvarTuple.getCoordWidth(), 1) cvarTuple.coordinates[1] *= 1.0 self.assertEqual(cvarTuple.getCoordWidth(), 1) with self.assertRaises(TypeError): TupleVariation({}, [None, "a"]).getCoordWidth() def test_scaleDeltas_cvar(self): var = TupleVariation({}, [100, None]) var.scaleDeltas(1.0) self.assertEqual(var.coordinates, [100, None]) var.scaleDeltas(0.333) self.assertAlmostEqual(var.coordinates[0], 33.3) self.assertIsNone(var.coordinates[1]) var.scaleDeltas(0.0) self.assertEqual(var.coordinates, [0, None]) def test_scaleDeltas_gvar(self): var = TupleVariation({}, [(100, 200), None]) var.scaleDeltas(1.0) self.assertEqual(var.coordinates, [(100, 200), None]) var.scaleDeltas(0.333) self.assertAlmostEqual(var.coordinates[0][0], 33.3) self.assertAlmostEqual(var.coordinates[0][1], 66.6) self.assertIsNone(var.coordinates[1]) var.scaleDeltas(0.0) self.assertEqual(var.coordinates, [(0, 0), None]) def test_roundDeltas_cvar(self): var = TupleVariation({}, [55.5, None, 99.9]) var.roundDeltas() self.assertEqual(var.coordinates, [56, None, 100]) def test_roundDeltas_gvar(self): var = TupleVariation({}, [(55.5, 100.0), None, (99.9, 100.0)]) var.roundDeltas() self.assertEqual(var.coordinates, [(56, 100), None, (100, 100)]) def test_calcInferredDeltas(self): var = TupleVariation({}, [(0, 0), None, None, None]) coords = [(1, 1), (1, 1), (1, 1), (1, 1)] var.calcInferredDeltas(coords, []) self.assertEqual(var.coordinates, [(0, 0), (0, 0), (0, 0), (0, 0)]) def test_calcInferredDeltas_invalid(self): # cvar tuples can't have inferred deltas with self.assertRaises(TypeError): TupleVariation({}, [0]).calcInferredDeltas([], []) # origCoords must have same length as self.coordinates with self.assertRaises(ValueError): TupleVariation({}, [(0, 0), None]).calcInferredDeltas([], []) # at least 4 phantom points required with self.assertRaises(AssertionError): TupleVariation({}, [(0, 0), None]).calcInferredDeltas([(0, 0), (0, 0)], []) with self.assertRaises(AssertionError): TupleVariation({}, [(0, 0)] + [None] * 5).calcInferredDeltas( [(0, 0)] * 6, [1, 0] # endPts not in increasing order ) def test_optimize(self): var = TupleVariation({"wght": (0.0, 1.0, 1.0)}, [(0, 0)] * 5) var.optimize([(0, 0)] * 5, [0]) self.assertEqual(var.coordinates, [None, None, None, None, None]) def test_optimize_isComposite(self): # when a composite glyph's deltas are all (0, 0), we still want # to write out an entry in gvar, else macOS doesn't apply any # variations to the composite glyph (even if its individual components # do vary). # https://github.com/fonttools/fonttools/issues/1381 var = TupleVariation({"wght": (0.0, 1.0, 1.0)}, [(0, 0)] * 5) var.optimize([(0, 0)] * 5, [0], isComposite=True) self.assertEqual(var.coordinates, [(0, 0)] * 5) # it takes more than 128 (0, 0) deltas before the optimized tuple with # (None) inferred deltas (except for the first) becomes smaller than # the un-optimized one that has all deltas explicitly set to (0, 0). var = TupleVariation({"wght": (0.0, 1.0, 1.0)}, [(0, 0)] * 129) var.optimize([(0, 0)] * 129, list(range(129 - 4)), isComposite=True) self.assertEqual(var.coordinates, [(0, 0)] + [None] * 128) def test_sum_deltas_gvar(self): var1 = TupleVariation( {}, [ (-20, 0), (-20, 0), (20, 0), (20, 0), (0, 0), (0, 0), (0, 0), (0, 0), ], ) var2 = TupleVariation( {}, [ (-10, 0), (-10, 0), (10, 0), (10, 0), (0, 0), (20, 0), (0, 0), (0, 0), ], ) var1 += var2 self.assertEqual( var1.coordinates, [ (-30, 0), (-30, 0), (30, 0), (30, 0), (0, 0), (20, 0), (0, 0), (0, 0), ], ) def test_sum_deltas_gvar_invalid_length(self): var1 = TupleVariation({}, [(1, 2)]) var2 = TupleVariation({}, [(1, 2), (3, 4)]) with self.assertRaisesRegex(ValueError, "deltas with different lengths"): var1 += var2 def test_sum_deltas_gvar_with_inferred_points(self): var1 = TupleVariation({}, [(1, 2), None]) var2 = TupleVariation({}, [(2, 3), None]) with self.assertRaisesRegex(ValueError, "deltas with inferred points"): var1 += var2 def test_sum_deltas_cvar(self): axes = {"wght": (0.0, 1.0, 1.0)} var1 = TupleVariation(axes, [0, 1, None, None]) var2 = TupleVariation(axes, [None, 2, None, 3]) var3 = TupleVariation(axes, [None, None, None, 4]) var1 += var2 var1 += var3 self.assertEqual(var1.coordinates, [0, 3, None, 7]) if __name__ == "__main__": import sys sys.exit(unittest.main())