import os
import textwrap
from xml.etree import ElementTree
from fontTools.ttLib import TTFont, newTable
from fontTools.misc.psCharStrings import T2CharString
from fontTools.ttLib.tables.otTables import GSUB,\
ScriptList, ScriptRecord, Script, DefaultLangSys,\
FeatureList, FeatureRecord, Feature,\
LookupList, Lookup, AlternateSubst, SingleSubst
# paths
directory = os.path.dirname(__file__)
shellSourcePath = os.path.join(directory, "gsubtest-shell.ttx")
shellTempPath = os.path.join(directory, "gsubtest-shell.otf")
featureList = os.path.join(directory, "gsubtest-features.txt")
javascriptData = os.path.join(directory, "gsubtest-features.js")
outputPath = os.path.join(os.path.dirname(directory), "gsubtest-lookup%d")
baseCodepoint = 0xe000
# -------
# Features
# -------
f = open(featureList, "rb")
text = f.read()
f.close()
mapping = []
for line in text.splitlines():
line = line.strip()
if not line:
continue
if line.startswith("#"):
continue
# parse
values = line.split("\t")
tag = values.pop(0)
mapping.append(tag);
# --------
# Outlines
# --------
def addGlyphToCFF(glyphName=None, program=None, private=None, globalSubrs=None, charStringsIndex=None, topDict=None, charStrings=None):
charString = T2CharString(program=program, private=private, globalSubrs=globalSubrs)
charStringsIndex.append(charString)
glyphID = len(topDict.charset)
charStrings.charStrings[glyphName] = glyphID
topDict.charset.append(glyphName)
def makeLookup1():
# make a variation of the shell TTX data
f = open(shellSourcePath)
ttxData = f.read()
f.close()
ttxData = ttxData.replace("__familyName__", "gsubtest-lookup1")
tempShellSourcePath = shellSourcePath + ".temp"
f = open(tempShellSourcePath, "wb")
f.write(ttxData)
f.close()
# compile the shell
shell = TTFont(sfntVersion="OTTO")
shell.importXML(tempShellSourcePath)
shell.save(shellTempPath)
os.remove(tempShellSourcePath)
# load the shell
shell = TTFont(shellTempPath)
# grab the PASS and FAIL data
hmtx = shell["hmtx"]
glyphSet = shell.getGlyphSet()
failGlyph = glyphSet["F"]
failGlyph.decompile()
failGlyphProgram = list(failGlyph.program)
failGlyphMetrics = hmtx["F"]
passGlyph = glyphSet["P"]
passGlyph.decompile()
passGlyphProgram = list(passGlyph.program)
passGlyphMetrics = hmtx["P"]
# grab some tables
hmtx = shell["hmtx"]
cmap = shell["cmap"]
# start the glyph order
existingGlyphs = [".notdef", "space", "F", "P"]
glyphOrder = list(existingGlyphs)
# start the CFF
cff = shell["CFF "].cff
globalSubrs = cff.GlobalSubrs
topDict = cff.topDictIndex[0]
topDict.charset = existingGlyphs
private = topDict.Private
charStrings = topDict.CharStrings
charStringsIndex = charStrings.charStringsIndex
features = sorted(mapping)
# build the outline, hmtx and cmap data
cp = baseCodepoint
for index, tag in enumerate(features):
# tag.pass
glyphName = "%s.pass" % tag
glyphOrder.append(glyphName)
addGlyphToCFF(
glyphName=glyphName,
program=passGlyphProgram,
private=private,
globalSubrs=globalSubrs,
charStringsIndex=charStringsIndex,
topDict=topDict,
charStrings=charStrings
)
hmtx[glyphName] = passGlyphMetrics
for table in cmap.tables:
if table.format == 4:
table.cmap[cp] = glyphName
else:
raise NotImplementedError("Unsupported cmap table format: %d" % table.format)
cp += 1
# tag.fail
glyphName = "%s.fail" % tag
glyphOrder.append(glyphName)
addGlyphToCFF(
glyphName=glyphName,
program=failGlyphProgram,
private=private,
globalSubrs=globalSubrs,
charStringsIndex=charStringsIndex,
topDict=topDict,
charStrings=charStrings
)
hmtx[glyphName] = failGlyphMetrics
for table in cmap.tables:
if table.format == 4:
table.cmap[cp] = glyphName
else:
raise NotImplementedError("Unsupported cmap table format: %d" % table.format)
# bump this up so that the sequence is the same as the lookup 3 font
cp += 3
# set the glyph order
shell.setGlyphOrder(glyphOrder)
# start the GSUB
shell["GSUB"] = newTable("GSUB")
gsub = shell["GSUB"].table = GSUB()
gsub.Version = 1.0
# make a list of all the features we will make
featureCount = len(features)
# set up the script list
scriptList = gsub.ScriptList = ScriptList()
scriptList.ScriptCount = 1
scriptList.ScriptRecord = []
scriptRecord = ScriptRecord()
scriptList.ScriptRecord.append(scriptRecord)
scriptRecord.ScriptTag = "DFLT"
script = scriptRecord.Script = Script()
defaultLangSys = script.DefaultLangSys = DefaultLangSys()
defaultLangSys.FeatureCount = featureCount
defaultLangSys.FeatureIndex = range(defaultLangSys.FeatureCount)
defaultLangSys.ReqFeatureIndex = 65535
defaultLangSys.LookupOrder = None
script.LangSysCount = 0
script.LangSysRecord = []
# set up the feature list
featureList = gsub.FeatureList = FeatureList()
featureList.FeatureCount = featureCount
featureList.FeatureRecord = []
for index, tag in enumerate(features):
# feature record
featureRecord = FeatureRecord()
featureRecord.FeatureTag = tag
feature = featureRecord.Feature = Feature()
featureList.FeatureRecord.append(featureRecord)
# feature
feature.FeatureParams = None
feature.LookupCount = 1
feature.LookupListIndex = [index]
# write the lookups
lookupList = gsub.LookupList = LookupList()
lookupList.LookupCount = featureCount
lookupList.Lookup = []
for tag in features:
# lookup
lookup = Lookup()
lookup.LookupType = 1
lookup.LookupFlag = 0
lookup.SubTableCount = 1
lookup.SubTable = []
lookupList.Lookup.append(lookup)
# subtable
subtable = SingleSubst()
subtable.Format = 2
subtable.LookupType = 1
subtable.mapping = {
"%s.pass" % tag : "%s.fail" % tag,
"%s.fail" % tag : "%s.pass" % tag,
}
lookup.SubTable.append(subtable)
path = outputPath % 1 + ".otf"
if os.path.exists(path):
os.remove(path)
shell.save(path)
# get rid of the shell
if os.path.exists(shellTempPath):
os.remove(shellTempPath)
def makeLookup3():
# make a variation of the shell TTX data
f = open(shellSourcePath)
ttxData = f.read()
f.close()
ttxData = ttxData.replace("__familyName__", "gsubtest-lookup3")
tempShellSourcePath = shellSourcePath + ".temp"
f = open(tempShellSourcePath, "wb")
f.write(ttxData)
f.close()
# compile the shell
shell = TTFont(sfntVersion="OTTO")
shell.importXML(tempShellSourcePath)
shell.save(shellTempPath)
os.remove(tempShellSourcePath)
# load the shell
shell = TTFont(shellTempPath)
# grab the PASS and FAIL data
hmtx = shell["hmtx"]
glyphSet = shell.getGlyphSet()
failGlyph = glyphSet["F"]
failGlyph.decompile()
failGlyphProgram = list(failGlyph.program)
failGlyphMetrics = hmtx["F"]
passGlyph = glyphSet["P"]
passGlyph.decompile()
passGlyphProgram = list(passGlyph.program)
passGlyphMetrics = hmtx["P"]
# grab some tables
hmtx = shell["hmtx"]
cmap = shell["cmap"]
# start the glyph order
existingGlyphs = [".notdef", "space", "F", "P"]
glyphOrder = list(existingGlyphs)
# start the CFF
cff = shell["CFF "].cff
globalSubrs = cff.GlobalSubrs
topDict = cff.topDictIndex[0]
topDict.charset = existingGlyphs
private = topDict.Private
charStrings = topDict.CharStrings
charStringsIndex = charStrings.charStringsIndex
features = sorted(mapping)
# build the outline, hmtx and cmap data
cp = baseCodepoint
for index, tag in enumerate(features):
# tag.pass
glyphName = "%s.pass" % tag
glyphOrder.append(glyphName)
addGlyphToCFF(
glyphName=glyphName,
program=passGlyphProgram,
private=private,
globalSubrs=globalSubrs,
charStringsIndex=charStringsIndex,
topDict=topDict,
charStrings=charStrings
)
hmtx[glyphName] = passGlyphMetrics
# tag.fail
glyphName = "%s.fail" % tag
glyphOrder.append(glyphName)
addGlyphToCFF(
glyphName=glyphName,
program=failGlyphProgram,
private=private,
globalSubrs=globalSubrs,
charStringsIndex=charStringsIndex,
topDict=topDict,
charStrings=charStrings
)
hmtx[glyphName] = failGlyphMetrics
# tag.default
glyphName = "%s.default" % tag
glyphOrder.append(glyphName)
addGlyphToCFF(
glyphName=glyphName,
program=passGlyphProgram,
private=private,
globalSubrs=globalSubrs,
charStringsIndex=charStringsIndex,
topDict=topDict,
charStrings=charStrings
)
hmtx[glyphName] = passGlyphMetrics
for table in cmap.tables:
if table.format == 4:
table.cmap[cp] = glyphName
else:
raise NotImplementedError("Unsupported cmap table format: %d" % table.format)
cp += 1
# tag.alt1,2,3
for i in range(1,4):
glyphName = "%s.alt%d" % (tag, i)
glyphOrder.append(glyphName)
addGlyphToCFF(
glyphName=glyphName,
program=failGlyphProgram,
private=private,
globalSubrs=globalSubrs,
charStringsIndex=charStringsIndex,
topDict=topDict,
charStrings=charStrings
)
hmtx[glyphName] = failGlyphMetrics
for table in cmap.tables:
if table.format == 4:
table.cmap[cp] = glyphName
else:
raise NotImplementedError("Unsupported cmap table format: %d" % table.format)
cp += 1
# set the glyph order
shell.setGlyphOrder(glyphOrder)
# start the GSUB
shell["GSUB"] = newTable("GSUB")
gsub = shell["GSUB"].table = GSUB()
gsub.Version = 1.0
# make a list of all the features we will make
featureCount = len(features)
# set up the script list
scriptList = gsub.ScriptList = ScriptList()
scriptList.ScriptCount = 1
scriptList.ScriptRecord = []
scriptRecord = ScriptRecord()
scriptList.ScriptRecord.append(scriptRecord)
scriptRecord.ScriptTag = "DFLT"
script = scriptRecord.Script = Script()
defaultLangSys = script.DefaultLangSys = DefaultLangSys()
defaultLangSys.FeatureCount = featureCount
defaultLangSys.FeatureIndex = range(defaultLangSys.FeatureCount)
defaultLangSys.ReqFeatureIndex = 65535
defaultLangSys.LookupOrder = None
script.LangSysCount = 0
script.LangSysRecord = []
# set up the feature list
featureList = gsub.FeatureList = FeatureList()
featureList.FeatureCount = featureCount
featureList.FeatureRecord = []
for index, tag in enumerate(features):
# feature record
featureRecord = FeatureRecord()
featureRecord.FeatureTag = tag
feature = featureRecord.Feature = Feature()
featureList.FeatureRecord.append(featureRecord)
# feature
feature.FeatureParams = None
feature.LookupCount = 1
feature.LookupListIndex = [index]
# write the lookups
lookupList = gsub.LookupList = LookupList()
lookupList.LookupCount = featureCount
lookupList.Lookup = []
for tag in features:
# lookup
lookup = Lookup()
lookup.LookupType = 3
lookup.LookupFlag = 0
lookup.SubTableCount = 1
lookup.SubTable = []
lookupList.Lookup.append(lookup)
# subtable
subtable = AlternateSubst()
subtable.Format = 1
subtable.LookupType = 3
subtable.alternates = {
"%s.default" % tag : ["%s.fail" % tag, "%s.fail" % tag, "%s.fail" % tag],
"%s.alt1" % tag : ["%s.pass" % tag, "%s.fail" % tag, "%s.fail" % tag],
"%s.alt2" % tag : ["%s.fail" % tag, "%s.pass" % tag, "%s.fail" % tag],
"%s.alt3" % tag : ["%s.fail" % tag, "%s.fail" % tag, "%s.pass" % tag]
}
lookup.SubTable.append(subtable)
path = outputPath % 3 + ".otf"
if os.path.exists(path):
os.remove(path)
shell.save(path)
# get rid of the shell
if os.path.exists(shellTempPath):
os.remove(shellTempPath)
def makeJavascriptData():
features = sorted(mapping)
outStr = []
outStr.append("")
outStr.append("/* This file is autogenerated by makegsubfonts.py */")
outStr.append("")
outStr.append("/* ")
outStr.append(" Features defined in gsubtest fonts with associated base")
outStr.append(" codepoints for each feature:")
outStr.append("")
outStr.append(" cp = codepoint for feature featX")
outStr.append("")
outStr.append(" cp default PASS")
outStr.append(" cp featX=1 FAIL")
outStr.append(" cp featX=2 FAIL")
outStr.append("")
outStr.append(" cp+1 default FAIL")
outStr.append(" cp+1 featX=1 PASS")
outStr.append(" cp+1 featX=2 FAIL")
outStr.append("")
outStr.append(" cp+2 default FAIL")
outStr.append(" cp+2 featX=1 FAIL")
outStr.append(" cp+2 featX=2 PASS")
outStr.append("")
outStr.append("*/")
outStr.append("")
outStr.append("var gFeatures = {");
cp = baseCodepoint
taglist = []
for tag in features:
taglist.append("\"%s\": 0x%x" % (tag, cp))
cp += 4
outStr.append(textwrap.fill(", ".join(taglist), initial_indent=" ", subsequent_indent=" "))
outStr.append("};");
outStr.append("");
if os.path.exists(javascriptData):
os.remove(javascriptData)
f = open(javascriptData, "wb")
f.write("\n".join(outStr))
f.close()
# build fonts
print("Making lookup type 1 font...")
makeLookup1()
print("Making lookup type 3 font...")
makeLookup3()
# output javascript data
print("Making javascript data file...")
makeJavascriptData()
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