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