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from fontTools.misc.py23 import *
from fontTools.misc.testTools import parseXML, getXML
from fontTools.misc.textTools import deHexStr
from fontTools.ttLib import TTFont, newTable, TTLibError
from fontTools.misc.loggingTools import CapturingLogHandler
from fontTools.ttLib.tables._h_m_t_x import table__h_m_t_x, log
import struct
import unittest
class HmtxTableTest(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
@classmethod
def setUpClass(cls):
cls.tableClass = table__h_m_t_x
cls.tag = "hmtx"
def makeFont(self, numGlyphs, numberOfMetrics):
font = TTFont()
maxp = font['maxp'] = newTable('maxp')
maxp.numGlyphs = numGlyphs
# from A to ...
font.glyphOrder = [chr(i) for i in range(65, 65+numGlyphs)]
headerTag = self.tableClass.headerTag
font[headerTag] = newTable(headerTag)
numberOfMetricsName = self.tableClass.numberOfMetricsName
setattr(font[headerTag], numberOfMetricsName, numberOfMetrics)
return font
def test_decompile(self):
font = self.makeFont(numGlyphs=3, numberOfMetrics=3)
data = deHexStr("02A2 FFF5 0278 004F 02C6 0036")
mtxTable = newTable(self.tag)
mtxTable.decompile(data, font)
self.assertEqual(mtxTable['A'], (674, -11))
self.assertEqual(mtxTable['B'], (632, 79))
self.assertEqual(mtxTable['C'], (710, 54))
def test_decompile_additional_SB(self):
font = self.makeFont(numGlyphs=4, numberOfMetrics=2)
metrics = deHexStr("02A2 FFF5 0278 004F")
extraSideBearings = deHexStr("0036 FFFC")
data = metrics + extraSideBearings
mtxTable = newTable(self.tag)
mtxTable.decompile(data, font)
self.assertEqual(mtxTable['A'], (674, -11))
self.assertEqual(mtxTable['B'], (632, 79))
# all following have same width as the previous
self.assertEqual(mtxTable['C'], (632, 54))
self.assertEqual(mtxTable['D'], (632, -4))
def test_decompile_not_enough_data(self):
font = self.makeFont(numGlyphs=1, numberOfMetrics=1)
mtxTable = newTable(self.tag)
msg = "not enough '%s' table data" % self.tag
with self.assertRaisesRegex(TTLibError, msg):
mtxTable.decompile(b"\0\0\0", font)
def test_decompile_too_much_data(self):
font = self.makeFont(numGlyphs=1, numberOfMetrics=1)
mtxTable = newTable(self.tag)
msg = "too much '%s' table data" % self.tag
with CapturingLogHandler(log, "WARNING") as captor:
mtxTable.decompile(b"\0\0\0\0\0", font)
self.assertTrue(
len([r for r in captor.records if msg == r.msg]) == 1)
def test_decompile_num_metrics_greater_than_glyphs(self):
font = self.makeFont(numGlyphs=1, numberOfMetrics=2)
mtxTable = newTable(self.tag)
msg = "The %s.%s exceeds the maxp.numGlyphs" % (
self.tableClass.headerTag, self.tableClass.numberOfMetricsName)
with CapturingLogHandler(log, "WARNING") as captor:
mtxTable.decompile(b"\0\0\0\0", font)
self.assertTrue(
len([r for r in captor.records if msg == r.msg]) == 1)
def test_decompile_possibly_negative_advance(self):
font = self.makeFont(numGlyphs=1, numberOfMetrics=1)
# we warn if advance is > 0x7FFF as it might be interpreted as signed
# by some authoring tools
data = deHexStr("8000 0000")
mtxTable = newTable(self.tag)
with CapturingLogHandler(log, "WARNING") as captor:
mtxTable.decompile(data, font)
self.assertTrue(
len([r for r in captor.records
if "has a huge advance" in r.msg]) == 1)
def test_decompile_no_header_table(self):
font = TTFont()
maxp = font['maxp'] = newTable('maxp')
maxp.numGlyphs = 3
font.glyphOrder = ["A", "B", "C"]
self.assertNotIn(self.tableClass.headerTag, font)
data = deHexStr("0190 001E 0190 0028 0190 0032")
mtxTable = newTable(self.tag)
mtxTable.decompile(data, font)
self.assertEqual(
mtxTable.metrics,
{
"A": (400, 30),
"B": (400, 40),
"C": (400, 50),
}
)
def test_compile(self):
# we set the wrong 'numberOfMetrics' to check it gets adjusted
font = self.makeFont(numGlyphs=3, numberOfMetrics=4)
mtxTable = font[self.tag] = newTable(self.tag)
mtxTable.metrics = {
'A': (674, -11),
'B': (632, 79),
'C': (710, 54),
}
data = mtxTable.compile(font)
self.assertEqual(data, deHexStr("02A2 FFF5 0278 004F 02C6 0036"))
headerTable = font[self.tableClass.headerTag]
self.assertEqual(
getattr(headerTable, self.tableClass.numberOfMetricsName), 3)
def test_compile_additional_SB(self):
font = self.makeFont(numGlyphs=4, numberOfMetrics=1)
mtxTable = font[self.tag] = newTable(self.tag)
mtxTable.metrics = {
'A': (632, -11),
'B': (632, 79),
'C': (632, 54),
'D': (632, -4),
}
data = mtxTable.compile(font)
self.assertEqual(data, deHexStr("0278 FFF5 004F 0036 FFFC"))
def test_compile_negative_advance(self):
font = self.makeFont(numGlyphs=1, numberOfMetrics=1)
mtxTable = font[self.tag] = newTable(self.tag)
mtxTable.metrics = {'A': [-1, 0]}
with CapturingLogHandler(log, "ERROR") as captor:
with self.assertRaisesRegex(TTLibError, "negative advance"):
mtxTable.compile(font)
self.assertTrue(
len([r for r in captor.records
if "Glyph 'A' has negative advance" in r.msg]) == 1)
def test_compile_struct_out_of_range(self):
font = self.makeFont(numGlyphs=1, numberOfMetrics=1)
mtxTable = font[self.tag] = newTable(self.tag)
mtxTable.metrics = {'A': (0xFFFF+1, -0x8001)}
with self.assertRaises(struct.error):
mtxTable.compile(font)
def test_compile_round_float_values(self):
font = self.makeFont(numGlyphs=3, numberOfMetrics=2)
mtxTable = font[self.tag] = newTable(self.tag)
mtxTable.metrics = {
'A': (0.5, 0.5), # round -> (1, 1)
'B': (0.1, 0.9), # round -> (0, 1)
'C': (0.1, 0.1), # round -> (0, 0)
}
data = mtxTable.compile(font)
self.assertEqual(data, deHexStr("0001 0001 0000 0001 0000"))
def test_compile_no_header_table(self):
font = TTFont()
maxp = font['maxp'] = newTable('maxp')
maxp.numGlyphs = 3
font.glyphOrder = [chr(i) for i in range(65, 68)]
mtxTable = font[self.tag] = newTable(self.tag)
mtxTable.metrics = {
"A": (400, 30),
"B": (400, 40),
"C": (400, 50),
}
self.assertNotIn(self.tableClass.headerTag, font)
data = mtxTable.compile(font)
self.assertEqual(data, deHexStr("0190 001E 0190 0028 0190 0032"))
def test_toXML(self):
font = self.makeFont(numGlyphs=2, numberOfMetrics=2)
mtxTable = font[self.tag] = newTable(self.tag)
mtxTable.metrics = {'B': (632, 79), 'A': (674, -11)}
self.assertEqual(
getXML(mtxTable.toXML),
('<mtx name="A" %s="674" %s="-11"/>\n'
'<mtx name="B" %s="632" %s="79"/>' % (
(self.tableClass.advanceName,
self.tableClass.sideBearingName) * 2)).split('\n'))
def test_fromXML(self):
mtxTable = newTable(self.tag)
for name, attrs, content in parseXML(
'<mtx name="A" %s="674" %s="-11"/>'
'<mtx name="B" %s="632" %s="79"/>' % (
(self.tableClass.advanceName,
self.tableClass.sideBearingName) * 2)):
mtxTable.fromXML(name, attrs, content, ttFont=None)
self.assertEqual(
mtxTable.metrics, {'A': (674, -11), 'B': (632, 79)})
def test_delitem(self):
mtxTable = newTable(self.tag)
mtxTable.metrics = {'A': (0, 0)}
del mtxTable['A']
self.assertTrue('A' not in mtxTable.metrics)
def test_setitem(self):
mtxTable = newTable(self.tag)
mtxTable.metrics = {'A': (674, -11), 'B': (632, 79)}
mtxTable['B'] = [0, 0] # list is converted to tuple
self.assertEqual(mtxTable.metrics, {'A': (674, -11), 'B': (0, 0)})
if __name__ == "__main__":
import sys
sys.exit(unittest.main())
|
