#! /usr/bin/env python
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from __future__ import print_function, division, absolute_import
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from fontTools.misc.py23 import *
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from fontTools.ttLib import TTFont
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from fontTools.ttLib.tables import otTables
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import sys
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if len(sys.argv) != 2:
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print("usage: layout-features.py fontfile.ttf")
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sys.exit(1)
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fontfile = sys.argv[1]
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if fontfile.rsplit(".", 1)[-1] == "ttx":
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font = TTFont()
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font.importXML(fontfile)
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else:
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font = TTFont(fontfile)
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for tag in ('GSUB', 'GPOS'):
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if not tag in font: continue
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print("Table:", tag)
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table = font[tag].table
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if not table.ScriptList or not table.FeatureList: continue
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featureRecords = table.FeatureList.FeatureRecord
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for script in table.ScriptList.ScriptRecord:
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print(" Script:", script.ScriptTag)
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if not script.Script:
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print (" Null script.")
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continue
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languages = list(script.Script.LangSysRecord)
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if script.Script.DefaultLangSys:
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defaultlangsys = otTables.LangSysRecord()
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defaultlangsys.LangSysTag = "default"
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defaultlangsys.LangSys = script.Script.DefaultLangSys
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languages.insert(0, defaultlangsys)
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for langsys in languages:
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print(" Language:", langsys.LangSysTag)
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if not langsys.LangSys:
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print (" Null language.")
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continue
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features = [featureRecords[index] for index in langsys.LangSys.FeatureIndex]
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if langsys.LangSys.ReqFeatureIndex != 0xFFFF:
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record = featureRecords[langsys.LangSys.ReqFeatureIndex]
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requiredfeature = otTables.FeatureRecord()
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requiredfeature.FeatureTag = 'required(%s)' % record.FeatureTag
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requiredfeature.Feature = record.Feature
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features.insert(0, requiredfeature)
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for feature in features:
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print(" Feature:", feature.FeatureTag)
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lookups = feature.Feature.LookupListIndex
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print(" Lookups:", ','.join(str(l) for l in lookups))
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