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kern.py
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import sys
import json
import configure
from fontTools.ttLib import TTFont, newTable
from fontTools.ttLib.tables._k_e_r_n import KernTable_format_0
def BuildGenericKernSubtable(font, cyrillic):
scriptDflt = [ scr for scr in font['GPOS'].table.ScriptList.ScriptRecord if scr.ScriptTag == 'DFLT' ]
scriptDfltFeaList = [ font['GPOS'].table.FeatureList.FeatureRecord[i] for i in scriptDflt[0].Script.DefaultLangSys.FeatureIndex ]
kernFeaList = [ fea.Feature for fea in scriptDfltFeaList if fea.FeatureTag == 'kern' ]
kernLutList = [ font['GPOS'].table.LookupList.Lookup[i] for fea in kernFeaList for i in fea.LookupListIndex ]
kernPairStList = sum([ lut.SubTable for lut in kernLutList if lut.LookupType == 2 ], [])
kernExtLutList = sum([ lut.SubTable for lut in kernLutList if lut.LookupType == 9 ], [])
kernPairStList += [ lut.ExtSubTable for lut in kernExtLutList if lut.ExtensionLookupType == 2 ]
# letters in Adobe Latin 1 and Adobe Cyrillic 1
kernSubset = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿıŁłŒœŠšŸŽžƒ"
if cyrillic:
kernSubset += "ЀЁЂЃЄЅІЇЈЉЊЋЌЍЎЏАБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдежзийклмнопрстуфхцчшщъыьэюяѐёђѓєѕіїјљњћќѝўџѢѣѲѳѴѵҐґ"
cmap = font['cmap'].getBestCmap()
kernGlyph = {*[ cmap[ord(ch)] for ch in kernSubset ]}
kernPairs = {}
for st in kernPairStList:
if st.Format == 1:
coverage = st.Coverage.glyphs
for i in range(st.PairSetCount):
first = coverage[i]
if first not in kernGlyph:
continue
pairSet = st.PairSet[i]
for pairRec in pairSet.PairValueRecord:
second = pairRec.SecondGlyph
if second not in kernGlyph:
continue
value = pairRec.Value1.XAdvance
if value:
kernPairs[(first, second)] = value
elif st.Format == 2:
coverage = st.Coverage.glyphs
classDef1 = st.ClassDef1.classDefs
classDef2 = st.ClassDef2.classDefs
for first in coverage:
if first not in kernGlyph:
continue
firstClass = classDef1.get(first, 0)
class1Record = st.Class1Record[firstClass]
for second in coverage:
if second not in kernGlyph:
continue
secondClass = classDef2.get(second, 0)
class2Record = class1Record.Class2Record[secondClass]
value = class2Record.Value1.XAdvance
if value:
kernPairs[(first, second)] = value
subtable = KernTable_format_0()
subtable.coverage = 0b00000001
subtable.format = 0
subtable.kernTable = kernPairs
return subtable
def BuildFuColonKernSubtable(font, left, right):
cmap = font['cmap'].getBestCmap()
nums = [ cmap[ord(i)] for i in "0123456789" ]
fuColon = cmap[ord("：")]
kernPairs = {(fuColon, n): right for n in nums}
if left:
kernPairs.update({ (n, fuColon): right for n in nums })
subtable = KernTable_format_0()
subtable.coverage = 0b00000001
subtable.format = 0
subtable.kernTable = kernPairs
return subtable
fuColonKernValue = {
"CN": (0, -300),
"TW": (-150, -150),
"HK": (-150, -150),
"JP": (-150, -150),
"KR": (-150, -150),
"CL": (-150, -150),
"GB": (0, -300),
}
if __name__ == "__main__":
param = sys.argv[1]
param = json.loads(param)
font = TTFont("build/unkerned-otf/{}.otf".format(configure.GenerateFilename(param)), recalcBBoxes=False, recalcTimestamp=False)
kern = newTable('kern')
kern.version = 0
kern.kernTables = [BuildGenericKernSubtable(font, "CyR" not in param["feature"])]
font['kern'] = kern
if "FuCK" in param["feature"]:
left, right = fuColonKernValue[param["region"]]
kern.kernTables.append(BuildFuColonKernSubtable(font, left, right))
font.save("build/final-otf/{}.otf".format(configure.GenerateFilename(param)))