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from fontTools.otlLib.builder import buildStatTable
# [from OpenType spec on STAT, flags]
# If set, it indicates that the axis value represents the “normal” value
# for the axis and may be omitted when composing name strings.
OT_ELIDABLE_AXIS_VALUE_NAME = 0x0002
def rebuildStatTable(font, designspace):
#
# Changing this code? See discussion at https://github.com/rsms/inter/issues/308
#
if not 'fvar' in font:
raise Exception('missing fvar table in font')
axes = [dict(tag=a.axisTag, name=a.axisNameID) for a in font['fvar'].axes]
# isMultiAxis is true when compiling the multi-axis VF,
# false when compiling e.g. Inter-roman.var.ttf
isMultiAxis = False
if len(axes) > 1:
isMultiAxis = True
axisTagToName = dict()
for axis in designspace.axes:
axisTagToName[axis.tag] = axis.name
weightAxisName = axisTagToName['wght']
slantAxisName = axisTagToName.get('slnt', 'Slant')
regularWeightValueEntry = None
weightValues = []
slantValues = []
extremeSlantValue = 0
for instance in designspace.instances:
weightValue = instance.location[weightAxisName]
slantValue = instance.location.get(slantAxisName, 0)
if slantValue != 0:
# slanted (we only make one entry: "Italic")
if isMultiAxis and weightValue == 400:
extremeSlantValue = slantValue
slantValues.append({
'name': instance.styleName,
'value': slantValue,
})
else:
# upright
v = {
'name': instance.styleName,
'value': weightValue,
}
if weightValue == 400:
v['flags'] = OT_ELIDABLE_AXIS_VALUE_NAME
v['linkedValue'] = 700 # style link to "Bold"
regularWeightValueEntry = v
weightValues.append(v)
# "Regular" entry for the slant axis, linked with the "Italic" entry
if isMultiAxis:
slantValues.append({
'name': regularWeightValueEntry['name'],
'value': 0,
'flags': OT_ELIDABLE_AXIS_VALUE_NAME,
'linkedValue': extremeSlantValue,
})
for a in axes:
tag = a['tag']
if tag == 'wght':
a['values'] = weightValues
elif tag == 'slnt' and len(slantValues) > 0:
a['values'] = slantValues
buildStatTable(font, axes)
# axisNameToTag = dict()
# for axis in designspace.axes:
# axisNameToTag[axis.name] = axis.tag
# locations = []
# for instance in designspace.instances:
# location = dict()
# for axisName, value in instance.location.items():
# tag = axisNameToTag[axisName]
# location[tag] = value
# loc = { 'name': instance.styleName, 'location': location }
# if instance.styleName == "Regular":
# loc['flags'] = OT_ELIDABLE_AXIS_VALUE_NAME
# locations.append(loc)
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