def _plotLocations3D(model, axes, fig, rows, cols, names, **kwargs):
ax1, ax2 = axes
for i, (support, color, name) in enumerate(
zip(model.supports, cycle(pyplot.cm.Set1.colors), cycle(names))):
axis3D = fig.add_subplot(rows, cols, i + 1, projection='3d')
if name is not None:
axis3D.set_title(name)
axis3D.set_xlabel(ax1)
axis3D.set_ylabel(ax2)
pyplot.xlim(-1., +1.)
pyplot.ylim(-1., +1.)
Xs = support.get(ax1, (-1., 0., +1.))
Ys = support.get(ax2, (-1., 0., +1.))
for x in stops(Xs):
X, Y, Z = [], [], []
for y in Ys:
z = supportScalar({ax1: x, ax2: y}, support)
X.append(x)
Y.append(y)
Z.append(z)
axis3D.plot(X, Y, Z, color=color, **kwargs)
for y in stops(Ys):
X, Y, Z = [], [], []
for x in Xs:
z = supportScalar({ax1: x, ax2: y}, support)
X.append(x)
Y.append(y)
Z.append(z)
axis3D.plot(X, Y, Z, color=color, **kwargs)
_plotLocationsDots(model.locations, [ax1, ax2], axis3D)
def _getScalar(self, regionIdx): scalar = self._scalars.get(regionIdx) if scalar is None: support = self._regions[regionIdx].get_support(self.fvar_axes) scalar = supportScalar(self.location, support) self._scalars[regionIdx] = scalar return scalar
def _getScalar(self, regionIdx): scalar = self._scalars.get(regionIdx) if scalar is None: support = self._regions[regionIdx].get_support(self.fvar_axes) scalar = supportScalar(self.location, support) self._scalars[regionIdx] = scalar return scalar
def draw(self, pen):
from fontTools.varLib.iup import iup_delta
from fontTools.ttLib.tables._g_l_y_f import GlyphCoordinates
from fontTools.varLib.models import supportScalar
glyf = self._ttFont['glyf']
hMetrics = self._ttFont['hmtx'].metrics
vMetrics = getattr(self._ttFont.get('vmtx'), 'metrics', None)
variations = self._ttFont['gvar'].variations[self._glyphName]
coordinates, _ = glyf._getCoordinatesAndControls(self._glyphName, hMetrics, vMetrics)
origCoords, endPts = None, None
for var in variations:
scalar = supportScalar(self._location, var.axes)
if not scalar:
continue
delta = var.coordinates
if None in delta:
if origCoords is None:
origCoords,control = glyf._getCoordinatesAndControls(self._glyphName, hMetrics, vMetrics)
endPts = control[1] if control[0] >= 1 else list(range(len(control[1])))
delta = iup_delta(delta, origCoords, endPts)
coordinates += GlyphCoordinates(delta) * scalar
glyph = copy(glyf[self._glyphName]) # Shallow copy
horizontalAdvanceWidth, leftSideBearing, verticalAdvanceWidth = _setCoordinates(glyph, coordinates, glyf)
self.width = horizontalAdvanceWidth
self.height = verticalAdvanceWidth
offset = leftSideBearing - glyph.xMin if hasattr(glyph, "xMin") else 0
glyph.draw(pen, glyf, offset)
def draw(self, pen):
glyph = self._ttFont['glyf'][self._glyphName]
glyph = self._copyGlyph(glyph, self._ttFont['glyf'])
if self.drawBefore is not None: # Call if defined
self.drawBefore(self, p, view)
variables = self._ttFont['gvar'].variables[self._glyphName]
coordinates, _ = _GetCoordinates(self._ttFont, self._glyphName)
for var in variables:
scalar = supportScalar(self._location, var.axes)
if not scalar:
continue
# print(var.coordinates)
if None in var.coordinates:
print("warning: replacing missing deltas with (0, 0)")
deltas = GlyphCoordinates([pt or (0, 0) for pt in var.coordinates])
coordinates += deltas * scalar
horizontalAdvanceWidth, leftSideBearing = setCoordinates(
glyph, coordinates, self._ttFont['glyf'])
self.width = horizontalAdvanceWidth
glyph.draw(pen, self._ttFont['glyf']) # XXX offset based on lsb
if self.drawAfter is not None: # Call if defined
self.drawAfter(self, p, view)
def instantiateTupleVariationStore(variations, location, origCoords=None, endPts=None):
"""Instantiate TupleVariation list at the given location.
The 'variations' list of TupleVariation objects is modified in-place.
The input location can describe either a full instance (all the axes are assigned an
explicit coordinate) or partial (some of the axes are omitted).
Tuples that do not participate are kept as they are. Those that have 0 influence
at the given location are removed from the variation store.
Those that are fully instantiated (i.e. all their axes are being pinned) are also
removed from the variation store, their scaled deltas accummulated and returned, so
that they can be added by the caller to the default instance's coordinates.
Tuples that are only partially instantiated (i.e. not all the axes that they
participate in are being pinned) are kept in the store, and their deltas multiplied
by the scalar support of the axes to be pinned at the desired location.
Args:
variations: List[TupleVariation] from either 'gvar' or 'cvar'.
location: Dict[str, float]: axes coordinates for the full or partial instance.
origCoords: GlyphCoordinates: default instance's coordinates for computing 'gvar'
inferred points (cf. table__g_l_y_f.getCoordinatesAndControls).
endPts: List[int]: indices of contour end points, for inferring 'gvar' deltas.
Returns:
List[float]: the overall delta adjustment after applicable deltas were summed.
"""
newVariations = collections.OrderedDict()
for var in variations:
# Compute the scalar support of the axes to be pinned at the desired location,
# excluding any axes that we are not pinning.
# If a TupleVariation doesn't mention an axis, it implies that the axis peak
# is 0 (i.e. the axis does not participate).
support = {axis: var.axes.pop(axis, (-1, 0, +1)) for axis in location}
scalar = supportScalar(location, support)
if scalar == 0.0:
# no influence, drop the TupleVariation
continue
# compute inferred deltas only for gvar ('origCoords' is None for cvar)
if origCoords is not None:
var.calcInferredDeltas(origCoords, endPts)
var.scaleDeltas(scalar)
# merge TupleVariations with overlapping "tents"
axes = tuple(var.axes.items())
if axes in newVariations:
newVariations[axes] += var
else:
newVariations[axes] = var
# drop TupleVariation if all axes have been pinned (var.axes.items() is empty);
# its deltas will be added to the default instance's coordinates
defaultVar = newVariations.pop(tuple(), None)
for var in newVariations.values():
var.roundDeltas()
variations[:] = list(newVariations.values())
return defaultVar.coordinates if defaultVar is not None else []
def plotLocationsSurfaces(locations, fig, names=None, **kwargs):
assert len(locations[0].keys()) == 2
if names is None:
names = ['']
n = len(locations)
cols = math.ceil(n**.5)
rows = math.ceil(n / cols)
model = VariationModel(locations)
names = [names[model.reverseMapping[i]] for i in range(len(names))]
ax1, ax2 = sorted(locations[0].keys())
for i, (support, color, name) in enumerate(
zip(model.supports, cycle(pyplot.cm.Set1.colors), cycle(names))):
axis3D = fig.add_subplot(rows, cols, i + 1, projection='3d')
axis3D.set_title(name)
axis3D.set_xlabel(ax1)
axis3D.set_ylabel(ax2)
pyplot.xlim(-1., +1.)
pyplot.ylim(-1., +1.)
Xs = support.get(ax1, (-1., 0., +1.))
Ys = support.get(ax2, (-1., 0., +1.))
for x in stops(Xs):
X, Y, Z = [], [], []
for y in Ys:
z = supportScalar({ax1: x, ax2: y}, support)
X.append(x)
Y.append(y)
Z.append(z)
axis3D.plot(X, Y, Z, color=color, **kwargs)
for y in stops(Ys):
X, Y, Z = [], [], []
for x in Xs:
z = supportScalar({ax1: x, ax2: y}, support)
X.append(x)
Y.append(y)
Z.append(z)
axis3D.plot(X, Y, Z, color=color, **kwargs)
plotLocations(model.locations, [ax1, ax2], axis3D)
def plotLocationsSurfaces(locations, fig, names=None, **kwargs):
assert len(locations[0].keys()) == 2
if names is None:
names = ['']
n = len(locations)
cols = math.ceil(n**.5)
rows = math.ceil(n / cols)
model = VariationModel(locations)
names = [names[model.reverseMapping[i]] for i in range(len(names))]
ax1, ax2 = sorted(locations[0].keys())
for i, (support,color, name) in enumerate(zip(model.supports, cycle(pyplot.cm.Set1.colors), cycle(names))):
axis3D = fig.add_subplot(rows, cols, i + 1, projection='3d')
axis3D.set_title(name)
axis3D.set_xlabel(ax1)
axis3D.set_ylabel(ax2)
pyplot.xlim(-1.,+1.)
pyplot.ylim(-1.,+1.)
Xs = support.get(ax1, (-1.,0.,+1.))
Ys = support.get(ax2, (-1.,0.,+1.))
for x in stops(Xs):
X, Y, Z = [], [], []
for y in Ys:
z = supportScalar({ax1:x, ax2:y}, support)
X.append(x)
Y.append(y)
Z.append(z)
axis3D.plot(X, Y, Z, color=color, **kwargs)
for y in stops(Ys):
X, Y, Z = [], [], []
for x in Xs:
z = supportScalar({ax1:x, ax2:y}, support)
X.append(x)
Y.append(y)
Z.append(z)
axis3D.plot(X, Y, Z, color=color, **kwargs)
plotLocations(model.locations, [ax1, ax2], axis3D)
def main(args=None):
if args is None:
import sys
args = sys.argv[1:]
varfilename = args[0]
locargs = args[1:]
outfile = os.path.splitext(varfilename)[0] + '-instance.ttf'
loc = {}
for arg in locargs:
tag, val = arg.split('=')
assert len(tag) <= 4
loc[tag.ljust(4)] = float(val)
print("Location:", loc)
print("Loading variable font")
varfont = TTFont(varfilename)
fvar = varfont['fvar']
axes = {
a.axisTag: (a.minValue, a.defaultValue, a.maxValue)
for a in fvar.axes
}
# TODO Round to F2Dot14?
loc = normalizeLocation(loc, axes)
# Location is normalized now
print("Normalized location:", loc)
gvar = varfont['gvar']
glyf = varfont['glyf']
# 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, _ = _GetCoordinates(varfont, glyphname)
for var in variations:
scalar = supportScalar(loc, var.axes)
if not scalar: continue
# TODO Do IUP / handle None items
coordinates += GlyphCoordinates(var.coordinates) * scalar
_SetCoordinates(varfont, glyphname, coordinates)
print("Removing variable tables")
for tag in ('avar', 'cvar', 'fvar', 'gvar', 'HVAR', 'MVAR', 'VVAR',
'STAT'):
if tag in varfont:
del varfont[tag]
print("Saving instance font", outfile)
varfont.save(outfile)
def _plotLocations2D(model, axis, fig, cols, rows, names, **kwargs):
for i, (support, color, name) in enumerate(
zip(model.supports, cycle(pyplot.cm.Set1.colors), cycle(names))):
subplot = fig.add_subplot(rows, cols, i + 1)
if name is not None:
subplot.set_title(name)
subplot.set_xlabel(axis)
pyplot.xlim(-1., +1.)
Xs = support.get(axis, (-1., 0., +1.))
X, Y = [], []
for x in stops(Xs):
y = supportScalar({axis: x}, support)
X.append(x)
Y.append(y)
subplot.plot(X, Y, color=color, **kwargs)
_plotLocationsDots(model.locations, [axis], subplot)
def instantiateGvarGlyph(varfont, location, glyphname):
glyf = varfont["glyf"]
gvar = varfont["gvar"]
variations = gvar.variations[glyphname]
coordinates = glyf.getCoordinates(glyphname, varfont)
origCoords = None
newVariations = []
pinnedAxes = set(location.keys())
defaultModified = False
for var in variations:
tupleAxes = set(var.axes.keys())
pinnedTupleAxes = tupleAxes & pinnedAxes
if not pinnedTupleAxes:
# A tuple for only axes being kept is untouched
newVariations.append(var)
continue
else:
# compute influence at pinned location only for the pinned axes
pinnedAxesSupport = {a: var.axes[a] for a in pinnedTupleAxes}
scalar = supportScalar(location, pinnedAxesSupport)
if not scalar:
# no influence (default value or out of range); drop tuple
continue
deltas = var.coordinates
hasUntouchedPoints = None in deltas
if hasUntouchedPoints:
if origCoords is None:
origCoords, g = glyf.getCoordinatesAndControls(glyphname, varfont)
deltas = iup_delta(deltas, origCoords, g.endPts)
scaledDeltas = GlyphCoordinates(deltas) * scalar
if tupleAxes.issubset(pinnedAxes):
# A tuple for only axes being pinned is discarded, and
# it's contribution is reflected into the base outlines
coordinates += scaledDeltas
defaultModified = True
else:
# A tuple for some axes being pinned has to be adjusted
var.coordinates = scaledDeltas
for axis in pinnedTupleAxes:
del var.axes[axis]
newVariations.append(var)
if defaultModified:
glyf.setCoordinates(glyphname, coordinates, varfont)
gvar.variations[glyphname] = newVariations
def main(args=None):
if args is None:
import sys
args = sys.argv[1:]
varfilename = args[0]
locargs = args[1:]
outfile = os.path.splitext(varfilename)[0] + '-instance.ttf'
loc = {}
for arg in locargs:
tag,val = arg.split('=')
assert len(tag) <= 4
loc[tag.ljust(4)] = float(val)
print("Location:", loc)
print("Loading GX font")
varfont = TTFont(varfilename)
fvar = varfont['fvar']
axes = {a.axisTag:(a.minValue,a.defaultValue,a.maxValue) for a in fvar.axes}
# TODO Round to F2Dot14?
loc = normalizeLocation(loc, axes)
# Location is normalized now
print("Normalized location:", loc)
gvar = varfont['gvar']
for glyphname,variations in gvar.variations.items():
coordinates,_ = _GetCoordinates(varfont, glyphname)
for var in variations:
scalar = supportScalar(loc, var.axes)
if not scalar: continue
# TODO Do IUP / handle None items
coordinates += GlyphCoordinates(var.coordinates) * scalar
_SetCoordinates(varfont, glyphname, coordinates)
print("Removing GX tables")
for tag in ('fvar','avar','gvar'):
if tag in varfont:
del varfont[tag]
print("Saving instance font", outfile)
varfont.save(outfile)
def instantiateCvar(varfont, location):
log.info("Instantiating cvt/cvar tables")
cvar = varfont["cvar"]
cvt = varfont["cvt "]
pinnedAxes = set(location.keys())
newVariations = []
deltas = {}
for var in cvar.variations:
tupleAxes = set(var.axes.keys())
pinnedTupleAxes = tupleAxes & pinnedAxes
if not pinnedTupleAxes:
# A tuple for only axes being kept is untouched
newVariations.append(var)
continue
else:
# compute influence at pinned location only for the pinned axes
pinnedAxesSupport = {a: var.axes[a] for a in pinnedTupleAxes}
scalar = supportScalar(location, pinnedAxesSupport)
if not scalar:
# no influence (default value or out of range); drop tuple
continue
if tupleAxes.issubset(pinnedAxes):
for i, c in enumerate(var.coordinates):
if c is not None:
# Compute deltas which need to be applied to values in cvt
deltas[i] = deltas.get(i, 0) + scalar * c
else:
# Apply influence to delta values
for i, d in enumerate(var.coordinates):
if d is not None:
var.coordinates[i] = otRound(d * scalar)
for axis in pinnedTupleAxes:
del var.axes[axis]
newVariations.append(var)
if deltas:
for i, delta in deltas.items():
cvt[i] += otRound(delta)
if newVariations:
cvar.variations = newVariations
else:
del varfont["cvar"]
def instantiateComponentOffsets(ttFont, glyphName, location):
glyfTable = ttFont["glyf"]
gvarTable = ttFont["gvar"]
assert glyfTable[glyphName].isComposite()
variations = gvarTable.variations[glyphName]
coordinates, _ = glyfTable.getCoordinatesAndControls(glyphName, ttFont)
origCoords, endPts = None, None
for var in variations:
scalar = supportScalar(location, var.axes)
if not scalar:
continue
delta = var.coordinates
if None in delta:
if origCoords is None:
origCoords, g = glyfTable.getCoordinatesAndControls(glyphName, ttFont)
endPts = g.endPts
delta = iup_delta(delta, origCoords, endPts)
coordinates += GlyphCoordinates(delta) * scalar
assert len(coordinates) == len(glyfTable[glyphName].components) + 4
return coordinates[:-4]
def generateInstance(variableFontPath,
location,
targetDirectory,
normalize=False,
force=False):
instanceName = ""
for k, v in sorted(location.items()):
# TODO better way to normalize the location name to (0, 1000)
v = min(v, 1000)
v = max(v, 0)
instanceName += "-%s%s" % (k, v)
targetFileName = '.'.join(variableFontPath.split('/')[-1].split('.')
[:-1]) + instanceName + '.ttf'
if not targetDirectory.endswith('/'):
targetDirectory += '/'
if not os.path.exists(targetDirectory):
os.makedirs(targetDirectory)
outFile = targetDirectory + targetFileName
if force or not os.path.exists(outFile):
#print location
#print("Loading variable font")
varFont = TTFont(variableFontPath)
fvar = varFont['fvar']
axes = {
a.axisTag: (a.minValue, a.defaultValue, a.maxValue)
for a in fvar.axes
}
# TODO Apply avar
# TODO Round to F2Dot14?
loc = normalizeLocation(location, axes)
# Location is normalized now
#print("Normalized location:", loc, 'from', location)
# Set the instance name IDs in the name table
platforms = ((1, 0, 0), (3, 1, 0x409)) # Macintosh and Windows
for platformID, platEncID, langID in platforms:
familyName = varFont['name'].getName(1, platformID, platEncID,
langID) # 1 Font Family name
if not familyName:
continue
familyName = familyName.toUnicode() # NameRecord to unicode string
styleName = unicode(
instanceName) # TODO make sure this works in any case
fullFontName = " ".join([familyName, styleName])
postscriptName = fullFontName.replace(" ", "-")
varFont['name'].setName(styleName, 2, platformID, platEncID,
langID) # 2 Font Subfamily name
varFont['name'].setName(fullFontName, 4, platformID, platEncID,
langID) # 4 Full font name
varFont['name'].setName(postscriptName, 6, platformID, platEncID,
langID) # 6 Postscript name for the font
# Other important name IDs
# 3 Unique font identifier (e.g. Version 0.000;NONE;Promise Bold Regular)
# 25 Variables PostScript Name Prefix
gvar = varFont['gvar']
glyf = varFont['glyf']
# 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, _ = _GetCoordinates(varFont, glyphname)
origCoords, endPts = None, None
for var in variations:
scalar = supportScalar(loc, var.axes) #, ot=True)
if not scalar: continue
delta = var.coordinates
if None in delta:
if origCoords is None:
origCoords, control = _GetCoordinates(
varFont, glyphname)
endPts = control[1] if control[0] >= 1 else list(
range(len(control[1])))
delta = _iup_delta(delta, origCoords, endPts)
coordinates += GlyphCoordinates(delta) * scalar
_SetCoordinates(varFont, glyphname, coordinates)
#print("Removing variable tables")
for tag in ('avar', 'cvar', 'fvar', 'gvar', 'HVAR', 'MVAR', 'VVAR',
'STAT'):
if tag in varFont:
del varFont[tag]
#print("Saving instance font", outFile)
varFont.save(outFile)
# Installing the font in DrawBot. Answer font name and path.
return c.installFont(outFile), outFile
def instantiateItemVariationStore(varfont, tableName, location):
log.info("Instantiating ItemVariation store of %s table", tableName)
table = varfont[tableName].table
fvar = varfont["fvar"]
newRegions = []
regionInfluenceMap = {}
pinnedAxes = set(location.keys())
fvarAxisIndices = {
axis.axisTag: index
for index, axis in enumerate(fvar.axes)
if axis.axisTag in pinnedAxes
}
for regionIndex, region in enumerate(table.VarStore.VarRegionList.Region):
# collect set of axisTags which have influence: peak != 0
regionAxes = set(
axis
for axis, (start, peak, end) in region.get_support(fvar.axes).items()
if peak != 0
)
pinnedRegionAxes = regionAxes & pinnedAxes
if not pinnedRegionAxes:
# A region where none of the axes having effect are pinned
newRegions.append(region)
continue
if len(pinnedRegionAxes) == len(regionAxes):
# All the axes having effect in this region are being pinned so
# remove it
regionInfluenceMap.update({regionIndex: None})
else:
# This region will be retained but the deltas have to be adjusted.
pinnedSupport = {
axis: support
for axis, support in region.get_support(fvar.axes).items()
if axis in pinnedRegionAxes
}
pinnedScalar = supportScalar(location, pinnedSupport)
regionInfluenceMap.update({regionIndex: pinnedScalar})
for axis in pinnedRegionAxes:
# For all pinnedRegionAxes make their influence null by setting
# PeakCoord to 0.
index = fvarAxisIndices[axis]
region.VarRegionAxis[index].PeakCoord = 0
newRegions.append(region)
table.VarStore.VarRegionList.Region = newRegions
if not table.VarStore.VarRegionList.Region:
# Delete table if no more regions left.
del varfont[tableName]
return
# Start modifying deltas.
if regionInfluenceMap:
regionsToBeRemoved = sorted(
[
regionIndex
for regionIndex, scalar in regionInfluenceMap.items()
if scalar is None
]
)
for vardata in table.VarStore.VarData:
varRegionIndexMapping = {v: k for k, v in enumerate(vardata.VarRegionIndex)}
# Apply scalars for regions to be retained.
for regionIndex, scalar in regionInfluenceMap.items():
if scalar is not None:
varRegionIndex = varRegionIndexMapping[regionIndex]
for item in vardata.Item:
item[varRegionIndex] = otRound(item[varRegionIndex] * scalar)
if regionsToBeRemoved:
# Delete deltas (in reverse order) for regions to be removed.
for regionIndex in sorted(
regionsToBeRemoved,
key=lambda x: varRegionIndexMapping[x],
reverse=True,
):
varRegionIndex = varRegionIndexMapping[regionIndex]
for item in vardata.Item:
del item[varRegionIndex]
# Adjust VarRegionIndex since we are deleting regions.
newVarRegionIndex = []
for varRegionIndex in vardata.VarRegionIndex:
if varRegionIndex not in regionsToBeRemoved:
newVarRegionIndex.append(
varRegionIndex
- bisect.bisect_left(regionsToBeRemoved, varRegionIndex)
)
vardata.VarRegionIndex = newVarRegionIndex
def instantiateVariableFont(varfont, location, inplace=False):
""" 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.
"""
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']
# 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,_ = _GetCoordinates(varfont, glyphname)
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,control = _GetCoordinates(varfont, glyphname)
endPts = control[1] if control[0] >= 1 else list(range(len(control[1])))
delta = iup_delta(delta, origCoords, endPts)
coordinates += GlyphCoordinates(delta) * scalar
_SetCoordinates(varfont, glyphname, coordinates)
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 hasattr(table, 'FeatureVariations'):
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, loc)
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 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']
if hasattr(maxp, "maxInstructionDefs"):
maxp.maxInstructionDefs += 1
else:
setattr(maxp, "maxInstructionDefs", 1)
if hasattr(maxp, "maxStackElements"):
maxp.maxStackElements = max(len(loc), maxp.maxStackElements)
else:
setattr(maxp, "maxInstructionDefs", len(loc))
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
def instantiateVariableFont(varfont, location, inplace=False):
""" 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.
"""
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']
# 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,_ = _GetCoordinates(varfont, glyphname)
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,control = _GetCoordinates(varfont, glyphname)
endPts = control[1] if control[0] >= 1 else list(range(len(control[1])))
delta = iup_delta(delta, origCoords, endPts)
coordinates += GlyphCoordinates(delta) * scalar
_SetCoordinates(varfont, glyphname, coordinates)
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(varfont)
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 hasattr(table, 'FeatureVariations'):
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, loc)
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 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']
if hasattr(maxp, "maxInstructionDefs"):
maxp.maxInstructionDefs += 1
else:
setattr(maxp, "maxInstructionDefs", 1)
if hasattr(maxp, "maxStackElements"):
maxp.maxStackElements = max(len(loc), maxp.maxStackElements)
else:
setattr(maxp, "maxInstructionDefs", len(loc))
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)
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
def test_supportScalar():
assert supportScalar({}, {}) == 1.0
assert supportScalar({'wght': .2}, {}) == 1.0
assert supportScalar({'wght': .2}, {'wght': (0, 2, 3)}) == 0.1
assert supportScalar({'wght': 2.5}, {'wght': (0, 2, 4)}) == 0.75
def main(args=None):
if args is None:
import sys
args = sys.argv[1:]
varfilename = args[0]
locargs = args[1:]
outfile = os.path.splitext(varfilename)[0] + '-instance.ttf'
loc = {}
for arg in locargs:
tag, val = arg.split('=')
assert len(tag) <= 4
loc[tag.ljust(4)] = float(val)
print("Location:", loc)
print("Loading variable font")
varfont = TTFont(varfilename)
fvar = varfont['fvar']
axes = {
a.axisTag: (a.minValue, a.defaultValue, a.maxValue)
for a in fvar.axes
}
# TODO Apply avar
# TODO Round to F2Dot14?
loc = normalizeLocation(loc, axes)
# Location is normalized now
print("Normalized location:", loc)
gvar = varfont['gvar']
glyf = varfont['glyf']
# 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, _ = _GetCoordinates(varfont, glyphname)
origCoords, endPts = None, None
for var in variations:
scalar = supportScalar(loc, var.axes, ot=True)
if not scalar: continue
delta = var.coordinates
if None in delta:
if origCoords is None:
origCoords, control = _GetCoordinates(varfont, glyphname)
endPts = control[1] if control[0] >= 1 else list(
range(len(control[1])))
delta = _iup_delta(delta, origCoords, endPts)
coordinates += GlyphCoordinates(delta) * scalar
_SetCoordinates(varfont, glyphname, coordinates)
# Interpolate cvt
if 'cvar' in varfont:
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] += int(round(delta))
print("Removing variable tables")
for tag in ('avar', 'cvar', 'fvar', 'gvar', 'HVAR', 'MVAR', 'VVAR',
'STAT'):
if tag in varfont:
del varfont[tag]
print("Saving instance font", outfile)
varfont.save(outfile)
def makeInstance(pathOrVarFont,
location,
dstPath=None,
normalize=True,
cached=True,
lazy=True,
kerning=None):
"""Instantiate an instance of a variable font at the specified location.
Keyword arguments:
- varfilename -- a variable font file path
- location -- a dictionary of axis tag and value {"wght": 0.75, "wdth": -0.5}
>>> vf = findFont('RobotoDelta-VF')
>>> print(vf)
<Font RobotoDelta-VF>
>>> print(len(vf))
188
>>> instance = makeInstance(vf.path, dict(opsz=8), cached=False)
>>> instance
<Font RobotoDelta-VF-opsz8>
>>> len(instance)
241
>>> len(instance['H'].points)
12
>>> instance['Egrave']
<PageBot Glyph Egrave Pts:0/Cnt:0/Cmp:2>
>>> len(instance['Egrave'].components)
2
"""
# make a custom file name from the location e.g.
# VariableFont-wghtXXX-wdthXXX.ttf
instanceName = ""
if isinstance(pathOrVarFont, Font):
pathOrVarFont = pathOrVarFont.path
varFont = Font(pathOrVarFont, lazy=lazy)
ttFont = varFont.ttFont
for k, v in sorted(location.items()):
# TODO better way to normalize the location name to (0, 1000)
v = min(v, 1000)
v = max(v, 0)
instanceName += "-%s%s" % (k, v)
if dstPath is None:
targetFileName = '.'.join(varFont.path.split('/')[-1].split('.')
[:-1]) + instanceName + '.ttf'
targetDirectory = getInstancePath()
if not targetDirectory.endswith('/'):
targetDirectory += '/'
if not os.path.exists(targetDirectory):
os.makedirs(targetDirectory)
dstPath = targetDirectory + targetFileName
# Instance does not exist as file. Create it.
if not cached or not os.path.exists(dstPath):
# Set the instance name IDs in the name table
platforms = ((1, 0, 0), (3, 1, 0x409)) # Macintosh and Windows
for platformID, platEncID, langID in platforms:
familyName = ttFont['name'].getName(1, platformID, platEncID,
langID) # 1 Font Family name
if not familyName:
continue
familyName = familyName.toUnicode() # NameRecord to unicode string
styleName = unicode(
instanceName) # TODO make sure this works in any case
fullFontName = " ".join([familyName, styleName])
postscriptName = fullFontName.replace(" ", "-")
ttFont['name'].setName(styleName, 2, platformID, platEncID,
langID) # 2 Font Subfamily name
ttFont['name'].setName(fullFontName, 4, platformID, platEncID,
langID) # 4 Full font name
ttFont['name'].setName(postscriptName, 6, platformID, platEncID,
langID) # 6 Postscript name for the font
# Other important name IDs
# 3 Unique font identifier (e.g. Version 0.000;NONE;Promise Bold Regular)
# 25 Variables PostScript Name Prefix
fvar = ttFont['fvar']
axes = {
a.axisTag: (a.minValue, a.defaultValue, a.maxValue)
for a in fvar.axes
}
# TODO Apply avar
# TODO Round to F2Dot14?
loc = normalizeLocation(location, axes)
# Location is normalized now
#print("Normalized location:", loc)
gvar = ttFont['gvar']
glyf = ttFont['glyf']
# 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, _ = _GetCoordinates(ttFont, glyphName)
origCoords, endPts = None, None
for var in variations:
scalar = supportScalar(loc, var.axes) #, ot=True)
if not scalar: continue
delta = var.coordinates
if None in delta:
if origCoords is None:
origCoords, control = _GetCoordinates(
ttFont, glyphName)
endPts = control[1] if control[0] >= 1 else list(
range(len(control[1])))
delta = iup_delta(delta, origCoords, endPts)
coordinates += GlyphCoordinates(delta) * scalar
_SetCoordinates(ttFont, glyphName, coordinates)
# Interpolate cvt
if 'cvar' in ttFont:
cvar = ttFont['cvar']
cvt = ttFont['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] += int(round(delta))
#print("Removing variable tables")
for tag in ('avar', 'cvar', 'fvar', 'gvar', 'HVAR', 'MVAR', 'VVAR',
'STAT'):
if tag in ttFont:
del ttFont[tag]
if kerning is not None:
for pair, value in kerning.items():
varFont.kerning[pair] = value
#print("Saving instance font", outFile)
varFont.save(dstPath)
# Answer instance.
return Font(dstPath, lazy=lazy)
def main(args=None):
if args is None:
import sys
args = sys.argv[1:]
varfilename = args[0]
locargs = args[1:]
outfile = os.path.splitext(varfilename)[0] + '-instance.ttf'
loc = {}
for arg in locargs:
tag,val = arg.split('=')
assert len(tag) <= 4
loc[tag.ljust(4)] = float(val)
print("Location:", loc)
print("Loading variable font")
varfont = TTFont(varfilename)
fvar = varfont['fvar']
axes = {a.axisTag:(a.minValue,a.defaultValue,a.maxValue) for a in fvar.axes}
# TODO Apply avar
# TODO Round to F2Dot14?
loc = normalizeLocation(loc, axes)
# Location is normalized now
print("Normalized location:", loc)
gvar = varfont['gvar']
glyf = varfont['glyf']
# 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,_ = _GetCoordinates(varfont, glyphname)
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,control = _GetCoordinates(varfont, glyphname)
endPts = control[1] if control[0] >= 1 else list(range(len(control[1])))
delta = _iup_delta(delta, origCoords, endPts)
# TODO Do IUP / handle None items
coordinates += GlyphCoordinates(delta) * scalar
_SetCoordinates(varfont, glyphname, coordinates)
print("Removing variable tables")
for tag in ('avar','cvar','fvar','gvar','HVAR','MVAR','VVAR','STAT'):
if tag in varfont:
del varfont[tag]
print("Saving instance font", outfile)
varfont.save(outfile)
def instantiateVariableFont(varfont, location, inplace=False):
""" 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.
"""
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:_DesignspaceAxis._map(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)
log.info("Mutating glyf/gvar tables")
gvar = varfont['gvar']
glyf = varfont['glyf']
# 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,_ = _GetCoordinates(varfont, glyphname)
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,control = _GetCoordinates(varfont, glyphname)
endPts = control[1] if control[0] >= 1 else list(range(len(control[1])))
delta = iup_delta(delta, origCoords, endPts)
coordinates += GlyphCoordinates(delta) * scalar
_SetCoordinates(varfont, glyphname, coordinates)
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 '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)
if 'GDEF' in varfont:
log.info("Mutating GDEF/GPOS/GSUB tables")
merger = MutatorMerger(varfont, loc)
log.info("Building interpolated tables")
merger.instantiate()
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)
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
def generateInstance(variableFontPath, location, targetDirectory, normalize=True):
u"""
Instantiate an instance of a variable font at the specified location.
Keyword arguments:
varfilename -- a variable font file path
location -- a dictionary of axis tag and value {"wght": 0.75, "wdth": -0.5}
"""
# make a custom file name from the location e.g. VariableFont-wghtXXX-wdthXXX.ttf
instanceName = ""
for k, v in sorted(location.items()):
# TODO better way to normalize the location name to (0, 1000)
v = min(v, 1000)
v = max(v, 0)
instanceName += "-%s%s" % (k, v)
targetFileName = '.'.join(variableFontPath.split('/')[-1].split('.')[:-1]) + instanceName + '.ttf'
if not targetDirectory.endswith('/'):
targetDirectory += '/'
if not os.path.exists(targetDirectory):
os.makedirs(targetDirectory)
outFile = targetDirectory + targetFileName
if not os.path.exists(outFile):
# Instance does not exist as file. Create it.
# print("Loading GX font")
varFont = TTFont(variableFontPath)
# Set the instance name IDs in the name table
platforms=((1, 0, 0), (3, 1, 0x409)) # Macintosh and Windows
for platformID, platEncID, langID in platforms:
familyName = varFont['name'].getName(1, platformID, platEncID, langID) # 1 Font Family name
if not familyName:
continue
familyName = familyName.toUnicode() # NameRecord to unicode string
styleName = unicode(instanceName) # TODO make sure this works in any case
fullFontName = " ".join([familyName, styleName])
postscriptName = fullFontName.replace(" ", "-")
varFont['name'].setName(styleName, 2, platformID, platEncID, langID) # 2 Font Subfamily name
varFont['name'].setName(fullFontName, 4, platformID, platEncID, langID) # 4 Full font name
varFont['name'].setName(postscriptName, 6, platformID, platEncID, langID) # 6 Postscript name for the font
# Other important name IDs
# 3 Unique font identifier (e.g. Version 0.000;NONE;Promise Bold Regular)
# 25 Variables PostScript Name Prefix
fvar = varFont['fvar']
axes = {a.axisTag: (a.minValue, a.defaultValue, a.maxValue) for a in fvar.axes}
# TODO Round to F2Dot14?
if normalize:
normalizedLoc = normalizeLocation(location, axes)
else:
normalizedLoc = location
# Location is normalized now
if DEBUG:
print("Normalized location:", varFileName, normalizedLoc)
gvar = varFont['gvar']
for glyphName, variations in gvar.variations.items():
coordinates, _ = _GetCoordinates(varFont, glyphName)
for var in variations:
scalar = supportScalar(normalizedLoc, var.axes)
if not scalar: continue
# TODO Do IUP / handle None items
varCoords = []
for coord in var.coordinates:
# TODO temp hack to avoid NoneType
if coord is None:
varCoords.append((0, 0))
else:
varCoords.append(coord)
coordinates += GlyphCoordinates(varCoords) * scalar
# coordinates += GlyphCoordinates(var.coordinates) * scalar
_SetCoordinates(varFont, glyphName, coordinates)
# print("Removing GX tables")
for tag in ('fvar', 'avar', 'gvar'):
if tag in varFont:
del varFont[tag]
# Fix leading bug in drawbot by setting lineGap to 0
varFont['hhea'].lineGap = 0
if DEBUG:
print("Saving instance font", outFile)
varFont.save(outFile)
# Installing the font in DrawBot. Answer font name and path.
return installFont(outFile), outFile
def test_supportScalar():
assert supportScalar({}, {}) == 1.0
assert supportScalar({"wght": 0.2}, {}) == 1.0
assert supportScalar({"wght": 0.2}, {"wght": (0, 2, 3)}) == 0.1
assert supportScalar({"wght": 2.5}, {"wght": (0, 2, 4)}) == 0.75
def test_supportScalar():
assert supportScalar({}, {}) == 1.0
assert supportScalar({'wght':.2}, {}) == 1.0
assert supportScalar({'wght':.2}, {'wght':(0,2,3)}) == 0.1
assert supportScalar({'wght':2.5}, {'wght':(0,2,4)}) == 0.75
def generateInstance(variableFontPath,
location,
targetDirectory,
normalize=True,
cached=True,
lazy=True):
"""
D E P R E C A T E D
Use pagebot.fonttoolbox.objects.font.instantiateVariableFont instead
(calling fontTools)
Instantiate an instance of a variable font at the specified location.
Keyword arguments:
varfilename -- a variable font file path
location -- a dictionary of axis tag and value {"wght": 0.75, "wdth":
-0.5}
"""
# make a custom file name from the location e.g. VariableFont-wghtXXX-wdthXXX.ttf
instanceName = ""
for k, v in sorted(location.items()):
# TODO better way to normalize the location name to (0, 1000)
v = min(v, 1000)
v = max(v, 0)
instanceName += "-%s%s" % (k, v)
targetFileName = '.'.join(variableFontPath.split('/')[-1].split('.')
[:-1]) + instanceName + '.ttf'
if not targetDirectory.endswith('/'):
targetDirectory += '/'
if not os.path.exists(targetDirectory):
os.makedirs(targetDirectory)
outFile = targetDirectory + targetFileName
if not cached or not os.path.exists(outFile):
# Instance does not exist as file. Create it.
# print("Loading GX font")
varfont = TTFont(variableFontPath, lazy=lazy)
# Set the instance name IDs in the name table
platforms = ((1, 0, 0), (3, 1, 0x409)) # Macintosh and Windows
for platformID, platEncID, langID in platforms:
familyName = varfont['name'].getName(1, platformID, platEncID,
langID) # 1 Font Family name
if not familyName:
continue
familyName = familyName.toUnicode() # NameRecord to unicode string
styleName = unicode(
instanceName) # TODO make sure this works in any case
fullFontName = " ".join([familyName, styleName])
postscriptName = fullFontName.replace(" ", "-")
varfont['name'].setName(styleName, 2, platformID, platEncID,
langID) # 2 Font Subfamily name
varfont['name'].setName(fullFontName, 4, platformID, platEncID,
langID) # 4 Full font name
varfont['name'].setName(postscriptName, 6, platformID, platEncID,
langID) # 6 Postscript name for the font
# Other important name IDs
# 3 Unique font identifier (e.g. Version 0.000;NONE;Promise Bold Regular)
# 25 Variables PostScript Name Prefix
fvar = varfont['fvar']
axes = {
a.axisTag: (a.minValue, a.defaultValue, a.maxValue)
for a in fvar.axes
}
# TODO Apply avar
# TODO Round to F2Dot14?
loc = normalizeLocation(location, axes)
# Location is normalized now
#print("Normalized location:", loc)
gvar = varfont['gvar']
glyf = varfont['glyf']
# 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, _ = _GetCoordinates(varfont, glyphname)
origCoords, endPts = None, None
for var in variations:
scalar = supportScalar(loc, var.axes) #, ot=True)
if not scalar: continue
delta = var.coordinates
if None in delta:
if origCoords is None:
origCoords, control = _GetCoordinates(
varfont, glyphname)
endPts = control[1] if control[0] >= 1 else list(
range(len(control[1])))
delta = iup_delta(delta, origCoords, endPts)
coordinates += GlyphCoordinates(delta) * scalar
_SetCoordinates(varfont, glyphname, coordinates)
# Interpolate cvt
if 'cvar' in varfont:
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] += int(round(delta))
#print("Removing variable tables")
for tag in ('avar', 'cvar', 'fvar', 'gvar', 'HVAR', 'MVAR', 'VVAR',
'STAT'):
if tag in varfont:
del varfont[tag]
#print("Saving instance font", outFile)
varfont.save(outFile)
# Answer the font name path.
return outFile
