def merge(merger, self, lst): assert self.Format == 1 XCoords = [a.XCoordinate for a in lst] YCoords = [a.YCoordinate for a in lst] model = merger.model scalars = merger.scalars self.XCoordinate = otRound(model.interpolateFromMastersAndScalars(XCoords, scalars)) self.YCoordinate = otRound(model.interpolateFromMastersAndScalars(YCoords, scalars))
def compile(self, ttFont):
metrics = []
hasNegativeAdvances = False
for glyphName in ttFont.getGlyphOrder():
advanceWidth, sideBearing = self.metrics[glyphName]
if advanceWidth < 0:
log.error("Glyph %r has negative advance %s" % (
glyphName, self.advanceName))
hasNegativeAdvances = True
metrics.append([advanceWidth, sideBearing])
headerTable = ttFont.get(self.headerTag)
if headerTable is not None:
lastAdvance = metrics[-1][0]
lastIndex = len(metrics)
while metrics[lastIndex-2][0] == lastAdvance:
lastIndex -= 1
if lastIndex <= 1:
# all advances are equal
lastIndex = 1
break
additionalMetrics = metrics[lastIndex:]
additionalMetrics = [otRound(sb) for _, sb in additionalMetrics]
metrics = metrics[:lastIndex]
numberOfMetrics = len(metrics)
setattr(headerTable, self.numberOfMetricsName, numberOfMetrics)
else:
# no hhea/vhea, can't store numberOfMetrics; assume == numGlyphs
numberOfMetrics = ttFont["maxp"].numGlyphs
additionalMetrics = []
allMetrics = []
for advance, sb in metrics:
allMetrics.extend([otRound(advance), otRound(sb)])
metricsFmt = ">" + self.longMetricFormat * numberOfMetrics
try:
data = struct.pack(metricsFmt, *allMetrics)
except struct.error as e:
if "out of range" in str(e) and hasNegativeAdvances:
raise ttLib.TTLibError(
"'%s' table can't contain negative advance %ss"
% (self.tableTag, self.advanceName))
else:
raise
additionalMetrics = array.array("h", additionalMetrics)
if sys.byteorder != "big": additionalMetrics.byteswap()
data = data + additionalMetrics.tobytes()
return data
def _convert(self, dest, field, converter, value):
enumClass = getattr(converter, "enumClass", None)
if enumClass:
if isinstance(value, enumClass):
pass
elif isinstance(value, str):
try:
value = getattr(enumClass, value.upper())
except AttributeError:
raise ValueError(f"{value} is not a valid {enumClass}")
else:
value = enumClass(value)
elif isinstance(converter, IntValue):
value = otRound(value)
elif isinstance(converter, FloatValue):
value = float(value)
elif isinstance(converter, Struct):
if converter.repeat:
if _isNonStrSequence(value):
value = [
self.build(converter.tableClass, v) for v in value
]
else:
value = [self.build(converter.tableClass, value)]
setattr(dest, converter.repeat, len(value))
else:
value = self.build(converter.tableClass, value)
elif callable(converter):
value = converter(value)
setattr(dest, field, value)
def merge(merger, self, lst):
# Hack till we become selfless.
self.__dict__ = lst[0].__dict__.copy()
if self.Format != 3:
return
instancer = merger.instancer
for v in "XY":
tableName = v + 'DeviceTable'
if not hasattr(self, tableName):
continue
dev = getattr(self, tableName)
if merger.deleteVariations:
delattr(self, tableName)
if dev is None:
continue
assert dev.DeltaFormat == 0x8000
varidx = (dev.StartSize << 16) + dev.EndSize
delta = otRound(instancer[varidx])
attr = v + 'Coordinate'
setattr(self, attr, getattr(self, attr) + delta)
if merger.deleteVariations:
self.Format = 1
def _bounds(color_glyph: ColorGlyph,
quantize_factor: int = 1) -> Optional[Tuple[int, int, int, int]]:
bounds = None
for root in color_glyph.painted_layers:
for context in root.breadth_first():
if not isinstance(context.paint, PaintGlyph):
continue
paint_glyph: PaintGlyph = cast(PaintGlyph, context.paint)
glyph_bbox = _transformed_glyph_bounds(color_glyph.ufo,
paint_glyph.glyph,
context.transform)
if glyph_bbox is None:
continue
if bounds is None:
bounds = glyph_bbox
else:
bounds = unionRect(bounds, glyph_bbox)
if bounds is None:
return
# before quantizing to integer values > 1, we must first round floats to
# int using the same rounding function (i.e. otRound) that fontTools
# glyf table's compile method will use to round any float coordinates.
bounds = tuple(otRound(v) for v in bounds)
if quantize_factor > 1:
return _quantize_bounding_rect(*bounds, factor=quantize_factor)
return bounds
def interpolate_cff2_metrics(varfont, topDict, glyphOrder, loc):
"""Unlike TrueType glyphs, neither advance width nor bounding box
info is stored in a CFF2 charstring. The width data exists only in
the hmtx and HVAR tables. Since LSB data cannot be interpolated
reliably from the master LSB values in the hmtx table, we traverse
the charstring to determine the actual bound box. """
charstrings = topDict.CharStrings
boundsPen = BoundsPen(glyphOrder)
hmtx = varfont['hmtx']
hvar_table = None
if 'HVAR' in varfont:
hvar_table = varfont['HVAR'].table
fvar = varfont['fvar']
varStoreInstancer = VarStoreInstancer(hvar_table.VarStore, fvar.axes,
loc)
for gid, gname in enumerate(glyphOrder):
entry = list(hmtx[gname])
# get width delta.
if hvar_table:
if hvar_table.AdvWidthMap:
width_idx = hvar_table.AdvWidthMap.mapping[gname]
else:
width_idx = gid
width_delta = otRound(varStoreInstancer[width_idx])
else:
width_delta = 0
# get LSB.
boundsPen.init()
charstring = charstrings[gname]
charstring.draw(boundsPen)
if boundsPen.bounds is None:
# Happens with non-marking glyphs
lsb_delta = 0
else:
lsb = otRound(boundsPen.bounds[0])
lsb_delta = entry[1] - lsb
if lsb_delta or width_delta:
if width_delta:
entry[0] += width_delta
if lsb_delta:
entry[1] = lsb
hmtx[gname] = tuple(entry)
def recalcAvgCharWidth(self, ttFont):
"""Recalculate xAvgCharWidth using metrics from ttFont's 'hmtx' table.
Set it to 0 if the unlikely event 'hmtx' table is not found.
"""
avg_width = 0
hmtx = ttFont.get("hmtx")
if hmtx:
widths = [m[0] for m in hmtx.metrics.values() if m[0] > 0]
avg_width = otRound(sum(widths) / len(widths))
self.xAvgCharWidth = avg_width
return avg_width
def outline(self, transform=None, evenOdd=False):
"""Converts the current contours to ``FT_Outline``.
Args:
transform: An optional 6-tuple containing an affine transformation,
or a ``Transform`` object from the ``fontTools.misc.transform``
module.
evenOdd: Pass ``True`` for even-odd fill instead of non-zero.
"""
transform = transform or Transform()
if not hasattr(transform, "transformPoint"):
transform = Transform(*transform)
n_contours = len(self.contours)
n_points = sum((len(contour.points) for contour in self.contours))
points = []
for contour in self.contours:
for point in contour.points:
point = transform.transformPoint(point)
points.append(
FT_Vector(FT_Pos(otRound(point[0] * 64)),
FT_Pos(otRound(point[1] * 64))))
tags = []
for contour in self.contours:
for tag in contour.tags:
tags.append(tag)
contours = []
contours_sum = 0
for contour in self.contours:
contours_sum += len(contour.points)
contours.append(contours_sum - 1)
flags = FT_OUTLINE_EVEN_ODD_FILL if evenOdd else FT_OUTLINE_NONE
return FT_Outline(
(ctypes.c_short)(n_contours),
(ctypes.c_short)(n_points),
(FT_Vector * n_points)(*points),
(ctypes.c_ubyte * n_points)(*tags),
(ctypes.c_short * n_contours)(*contours),
(ctypes.c_int)(flags),
)
def interpolate_cff2_PrivateDict(topDict, interpolateFromDeltas):
pd_blend_lists = ("BlueValues", "OtherBlues", "FamilyBlues",
"FamilyOtherBlues", "StemSnapH", "StemSnapV")
pd_blend_values = ("BlueScale", "BlueShift", "BlueFuzz", "StdHW", "StdVW")
for fontDict in topDict.FDArray:
pd = fontDict.Private
vsindex = pd.vsindex if (hasattr(pd, 'vsindex')) else 0
for key, value in pd.rawDict.items():
if (key in pd_blend_values) and isinstance(value, list):
delta = interpolateFromDeltas(vsindex, value[1:])
pd.rawDict[key] = otRound(value[0] + delta)
elif (key in pd_blend_lists) and isinstance(value[0], list):
"""If any argument in a BlueValues list is a blend list,
then they all are. The first value of each list is an
absolute value. The delta tuples are calculated from
relative master values, hence we need to append all the
deltas to date to each successive absolute value."""
delta = 0
for i, val_list in enumerate(value):
delta += otRound(
interpolateFromDeltas(vsindex, val_list[1:]))
value[i] = val_list[0] + delta
def set_default_weight_width_slant(font, location):
if "OS/2" in font:
if "wght" in location:
weight_class = otRound(max(1, min(location["wght"], 1000)))
if font["OS/2"].usWeightClass != weight_class:
log.info("Setting OS/2.usWeightClass = %s", weight_class)
font["OS/2"].usWeightClass = weight_class
if "wdth" in location:
# map 'wdth' axis (50..200) to OS/2.usWidthClass (1..9), rounding to closest
widthValue = min(max(location["wdth"], 50), 200)
widthClass = otRound(
models.piecewiseLinearMap(widthValue,
WDTH_VALUE_TO_OS2_WIDTH_CLASS))
if font["OS/2"].usWidthClass != widthClass:
log.info("Setting OS/2.usWidthClass = %s", widthClass)
font["OS/2"].usWidthClass = widthClass
if "slnt" in location and "post" in font:
italicAngle = max(-90, min(location["slnt"], 90))
if font["post"].italicAngle != italicAngle:
log.info("Setting post.italicAngle = %s", italicAngle)
font["post"].italicAngle = italicAngle
def merge(merger, self, lst):
model = merger.model
scalars = merger.scalars
# TODO Handle differing valueformats
for name, tableName in [('XAdvance','XAdvDevice'),
('YAdvance','YAdvDevice'),
('XPlacement','XPlaDevice'),
('YPlacement','YPlaDevice')]:
assert not hasattr(self, tableName)
if hasattr(self, name):
values = [getattr(a, name, 0) for a in lst]
value = otRound(model.interpolateFromMastersAndScalars(values, scalars))
setattr(self, name, value)
def getCharString(self, private=None, globalSubrs=None, optimize=True):
commands = self._commands
if optimize:
maxstack = 48 if not self._CFF2 else 513
commands = specializeCommands(commands,
generalizeFirst=False,
maxstack=maxstack)
program = commandsToProgram(commands)
if self._width is not None:
assert not self._CFF2, "CFF2 does not allow encoding glyph width in CharString."
program.insert(0, otRound(self._width))
if not self._CFF2:
program.append('endchar')
charString = T2CharString(
program=program, private=private, globalSubrs=globalSubrs)
return charString
def merge(merger, self, lst):
# Hack till we become selfless.
self.__dict__ = lst[0].__dict__.copy()
if self.Format != 3:
return
instancer = merger.instancer
dev = self.DeviceTable
if merger.deleteVariations:
del self.DeviceTable
if dev:
assert dev.DeltaFormat == 0x8000
varidx = (dev.StartSize << 16) + dev.EndSize
delta = otRound(instancer[varidx])
self.Coordinate += delta
if merger.deleteVariations:
self.Format = 1
def interpolate_cff2_charstrings(topDict, interpolateFromDeltas, glyphOrder):
charstrings = topDict.CharStrings
for gname in glyphOrder:
# Interpolate charstring
# e.g replace blend op args with regular args,
# and use and discard vsindex op.
charstring = charstrings[gname]
new_program = []
vsindex = 0
last_i = 0
for i, token in enumerate(charstring.program):
if token == 'vsindex':
vsindex = charstring.program[i - 1]
if last_i != 0:
new_program.extend(charstring.program[last_i:i - 1])
last_i = i + 1
elif token == 'blend':
num_regions = charstring.getNumRegions(vsindex)
numMasters = 1 + num_regions
num_args = charstring.program[i - 1]
# The program list starting at program[i] is now:
# ..args for following operations
# num_args values from the default font
# num_args tuples, each with numMasters-1 delta values
# num_blend_args
# 'blend'
argi = i - (num_args * numMasters + 1)
end_args = tuplei = argi + num_args
while argi < end_args:
next_ti = tuplei + num_regions
deltas = charstring.program[tuplei:next_ti]
delta = interpolateFromDeltas(vsindex, deltas)
charstring.program[argi] += otRound(delta)
tuplei = next_ti
argi += 1
new_program.extend(charstring.program[last_i:end_args])
last_i = i + 1
if last_i != 0:
new_program.extend(charstring.program[last_i:])
charstring.program = new_program
def _buildComponents(self, componentFlags):
if self.handleOverflowingTransforms:
# we can't encode transform values > 2 or < -2 in F2Dot14,
# so we must decompose the glyph if any transform exceeds these
overflowing = any(s > 2 or s < -2
for (glyphName,
transformation) in self.components
for s in transformation[:4])
components = []
for glyphName, transformation in self.components:
if glyphName not in self.glyphSet:
self.log.warning(
f"skipped non-existing component '{glyphName}'")
continue
if self.points or (self.handleOverflowingTransforms
and overflowing):
# can't have both coordinates and components, so decompose
self._decompose(glyphName, transformation)
continue
component = GlyphComponent()
component.glyphName = glyphName
component.x, component.y = (otRound(v) for v in transformation[4:])
# quantize floats to F2Dot14 so we get same values as when decompiled
# from a binary glyf table
transformation = tuple(
floatToFixedToFloat(v, 14) for v in transformation[:4])
if transformation != (1, 0, 0, 1):
if self.handleOverflowingTransforms and any(
MAX_F2DOT14 < s <= 2 for s in transformation):
# clamp values ~= +2.0 so we can keep the component
transformation = tuple(
MAX_F2DOT14 if MAX_F2DOT14 < s <= 2 else s
for s in transformation)
component.transform = (transformation[:2], transformation[2:])
component.flags = componentFlags
components.append(component)
return components
def merge(merger, self, lst):
# Hack till we become selfless.
self.__dict__ = lst[0].__dict__.copy()
instancer = merger.instancer
for name, tableName in [('XAdvance', 'XAdvDevice'),
('YAdvance', 'YAdvDevice'),
('XPlacement', 'XPlaDevice'),
('YPlacement', 'YPlaDevice')]:
if not hasattr(self, tableName):
continue
dev = getattr(self, tableName)
if merger.deleteVariations:
delattr(self, tableName)
if dev is None:
continue
assert dev.DeltaFormat == 0x8000
varidx = (dev.StartSize << 16) + dev.EndSize
delta = otRound(instancer[varidx])
setattr(self, name, getattr(self, name) + delta)
def _round_point(pt):
return (otRound(pt[0]), otRound(pt[1]))
def round(self):
return Circle(_round_point(self.centre), otRound(self.radius))
def instantiateVariableFont(varfont, location, inplace=False, overlap=True):
""" Generate a static instance from a variable TTFont and a dictionary
defining the desired location along the variable font's axes.
The location values must be specified as user-space coordinates, e.g.:
{'wght': 400, 'wdth': 100}
By default, a new TTFont object is returned. If ``inplace`` is True, the
input varfont is modified and reduced to a static font.
When the overlap parameter is defined as True,
OVERLAP_SIMPLE and OVERLAP_COMPOUND bits are set to 1. See
https://docs.microsoft.com/en-us/typography/opentype/spec/glyf
"""
if not inplace:
# make a copy to leave input varfont unmodified
stream = BytesIO()
varfont.save(stream)
stream.seek(0)
varfont = TTFont(stream)
fvar = varfont['fvar']
axes = {
a.axisTag: (a.minValue, a.defaultValue, a.maxValue)
for a in fvar.axes
}
loc = normalizeLocation(location, axes)
if 'avar' in varfont:
maps = varfont['avar'].segments
loc = {k: piecewiseLinearMap(v, maps[k]) for k, v in loc.items()}
# Quantize to F2Dot14, to avoid surprise interpolations.
loc = {k: floatToFixedToFloat(v, 14) for k, v in loc.items()}
# Location is normalized now
log.info("Normalized location: %s", loc)
if 'gvar' in varfont:
log.info("Mutating glyf/gvar tables")
gvar = varfont['gvar']
glyf = varfont['glyf']
hMetrics = varfont['hmtx'].metrics
vMetrics = getattr(varfont.get('vmtx'), 'metrics', None)
# get list of glyph names in gvar sorted by component depth
glyphnames = sorted(
gvar.variations.keys(),
key=lambda name:
(glyf[name].getCompositeMaxpValues(glyf).maxComponentDepth
if glyf[name].isComposite() else 0, name))
for glyphname in glyphnames:
variations = gvar.variations[glyphname]
coordinates, _ = glyf._getCoordinatesAndControls(
glyphname, hMetrics, vMetrics)
origCoords, endPts = None, None
for var in variations:
scalar = supportScalar(loc, var.axes)
if not scalar: continue
delta = var.coordinates
if None in delta:
if origCoords is None:
origCoords, g = glyf._getCoordinatesAndControls(
glyphname, hMetrics, vMetrics)
delta = iup_delta(delta, origCoords, g.endPts)
coordinates += GlyphCoordinates(delta) * scalar
glyf._setCoordinates(glyphname, coordinates, hMetrics, vMetrics)
else:
glyf = None
if 'cvar' in varfont:
log.info("Mutating cvt/cvar tables")
cvar = varfont['cvar']
cvt = varfont['cvt ']
deltas = {}
for var in cvar.variations:
scalar = supportScalar(loc, var.axes)
if not scalar: continue
for i, c in enumerate(var.coordinates):
if c is not None:
deltas[i] = deltas.get(i, 0) + scalar * c
for i, delta in deltas.items():
cvt[i] += otRound(delta)
if 'CFF2' in varfont:
log.info("Mutating CFF2 table")
glyphOrder = varfont.getGlyphOrder()
CFF2 = varfont['CFF2']
topDict = CFF2.cff.topDictIndex[0]
vsInstancer = VarStoreInstancer(topDict.VarStore.otVarStore, fvar.axes,
loc)
interpolateFromDeltas = vsInstancer.interpolateFromDeltas
interpolate_cff2_PrivateDict(topDict, interpolateFromDeltas)
CFF2.desubroutinize()
interpolate_cff2_charstrings(topDict, interpolateFromDeltas,
glyphOrder)
interpolate_cff2_metrics(varfont, topDict, glyphOrder, loc)
del topDict.rawDict['VarStore']
del topDict.VarStore
if 'MVAR' in varfont:
log.info("Mutating MVAR table")
mvar = varfont['MVAR'].table
varStoreInstancer = VarStoreInstancer(mvar.VarStore, fvar.axes, loc)
records = mvar.ValueRecord
for rec in records:
mvarTag = rec.ValueTag
if mvarTag not in MVAR_ENTRIES:
continue
tableTag, itemName = MVAR_ENTRIES[mvarTag]
delta = otRound(varStoreInstancer[rec.VarIdx])
if not delta:
continue
setattr(varfont[tableTag], itemName,
getattr(varfont[tableTag], itemName) + delta)
log.info("Mutating FeatureVariations")
for tableTag in 'GSUB', 'GPOS':
if not tableTag in varfont:
continue
table = varfont[tableTag].table
if not getattr(table, 'FeatureVariations', None):
continue
variations = table.FeatureVariations
for record in variations.FeatureVariationRecord:
applies = True
for condition in record.ConditionSet.ConditionTable:
if condition.Format == 1:
axisIdx = condition.AxisIndex
axisTag = fvar.axes[axisIdx].axisTag
Min = condition.FilterRangeMinValue
Max = condition.FilterRangeMaxValue
v = loc[axisTag]
if not (Min <= v <= Max):
applies = False
else:
applies = False
if not applies:
break
if applies:
assert record.FeatureTableSubstitution.Version == 0x00010000
for rec in record.FeatureTableSubstitution.SubstitutionRecord:
table.FeatureList.FeatureRecord[
rec.FeatureIndex].Feature = rec.Feature
break
del table.FeatureVariations
if 'GDEF' in varfont and varfont['GDEF'].table.Version >= 0x00010003:
log.info("Mutating GDEF/GPOS/GSUB tables")
gdef = varfont['GDEF'].table
instancer = VarStoreInstancer(gdef.VarStore, fvar.axes, loc)
merger = MutatorMerger(varfont, instancer)
merger.mergeTables(varfont, [varfont], ['GDEF', 'GPOS'])
# Downgrade GDEF.
del gdef.VarStore
gdef.Version = 0x00010002
if gdef.MarkGlyphSetsDef is None:
del gdef.MarkGlyphSetsDef
gdef.Version = 0x00010000
if not (gdef.LigCaretList or gdef.MarkAttachClassDef
or gdef.GlyphClassDef or gdef.AttachList or
(gdef.Version >= 0x00010002 and gdef.MarkGlyphSetsDef)):
del varfont['GDEF']
addidef = False
if glyf:
for glyph in glyf.glyphs.values():
if hasattr(glyph, "program"):
instructions = glyph.program.getAssembly()
# If GETVARIATION opcode is used in bytecode of any glyph add IDEF
addidef = any(
op.startswith("GETVARIATION") for op in instructions)
if addidef:
break
if overlap:
for glyph_name in glyf.keys():
glyph = glyf[glyph_name]
# Set OVERLAP_COMPOUND bit for compound glyphs
if glyph.isComposite():
glyph.components[0].flags |= OVERLAP_COMPOUND
# Set OVERLAP_SIMPLE bit for simple glyphs
elif glyph.numberOfContours > 0:
glyph.flags[0] |= flagOverlapSimple
if addidef:
log.info("Adding IDEF to fpgm table for GETVARIATION opcode")
asm = []
if 'fpgm' in varfont:
fpgm = varfont['fpgm']
asm = fpgm.program.getAssembly()
else:
fpgm = newTable('fpgm')
fpgm.program = ttProgram.Program()
varfont['fpgm'] = fpgm
asm.append("PUSHB[000] 145")
asm.append("IDEF[ ]")
args = [str(len(loc))]
for a in fvar.axes:
args.append(str(floatToFixed(loc[a.axisTag], 14)))
asm.append("NPUSHW[ ] " + ' '.join(args))
asm.append("ENDF[ ]")
fpgm.program.fromAssembly(asm)
# Change maxp attributes as IDEF is added
if 'maxp' in varfont:
maxp = varfont['maxp']
setattr(maxp, "maxInstructionDefs",
1 + getattr(maxp, "maxInstructionDefs", 0))
setattr(maxp, "maxStackElements",
max(len(loc), getattr(maxp, "maxStackElements", 0)))
if 'name' in varfont:
log.info("Pruning name table")
exclude = {a.axisNameID for a in fvar.axes}
for i in fvar.instances:
exclude.add(i.subfamilyNameID)
exclude.add(i.postscriptNameID)
if 'ltag' in varfont:
# Drop the whole 'ltag' table if all its language tags are referenced by
# name records to be pruned.
# TODO: prune unused ltag tags and re-enumerate langIDs accordingly
excludedUnicodeLangIDs = [
n.langID for n in varfont['name'].names if n.nameID in exclude
and n.platformID == 0 and n.langID != 0xFFFF
]
if set(excludedUnicodeLangIDs) == set(
range(len((varfont['ltag'].tags)))):
del varfont['ltag']
varfont['name'].names[:] = [
n for n in varfont['name'].names if n.nameID not in exclude
]
if "wght" in location and "OS/2" in varfont:
varfont["OS/2"].usWeightClass = otRound(
max(1, min(location["wght"], 1000)))
if "wdth" in location:
wdth = location["wdth"]
for percent, widthClass in sorted(OS2_WIDTH_CLASS_VALUES.items()):
if wdth < percent:
varfont["OS/2"].usWidthClass = widthClass
break
else:
varfont["OS/2"].usWidthClass = 9
if "slnt" in location and "post" in varfont:
varfont["post"].italicAngle = max(-90, min(location["slnt"], 90))
log.info("Removing variable tables")
for tag in ('avar', 'cvar', 'fvar', 'gvar', 'HVAR', 'MVAR', 'VVAR',
'STAT'):
if tag in varfont:
del varfont[tag]
return varfont
