blob: 36ac7565995e7cda463013ed1d959f43accb957c [file] [log] [blame]
# Copyright 2013 Google, Inc. All Rights Reserved.
# Google Author(s): Behdad Esfahbod, Roozbeh Pournader
"""Font merger.
from __future__ import print_function, division, absolute_import
from fontTools.misc.py23 import *
from fontTools.misc.timeTools import timestampNow
from fontTools import ttLib, cffLib
from fontTools.ttLib.tables import otTables, _h_e_a_d
from fontTools.ttLib.tables.DefaultTable import DefaultTable
from fontTools.misc.loggingTools import Timer
from fontTools.pens.recordingPen import DecomposingRecordingPen
from functools import reduce
import sys
import time
import operator
import logging
log = logging.getLogger("fontTools.merge")
timer = Timer(logger=logging.getLogger(__name__+".timer"), level=logging.INFO)
def _add_method(*clazzes, **kwargs):
"""Returns a decorator function that adds a new method to one or
more classes."""
allowDefault = kwargs.get('allowDefaultTable', False)
def wrapper(method):
done = []
for clazz in clazzes:
if clazz in done: continue # Support multiple names of a clazz
assert allowDefault or clazz != DefaultTable, 'Oops, table class not found.'
assert method.__name__ not in clazz.__dict__, \
"Oops, class '%s' has method '%s'." % (clazz.__name__, method.__name__)
setattr(clazz, method.__name__, method)
return None
return wrapper
# General utility functions for merging values from different fonts
def equal(lst):
lst = list(lst)
t = iter(lst)
first = next(t)
assert all(item == first for item in t), "Expected all items to be equal: %s" % lst
return first
def first(lst):
return next(iter(lst))
def recalculate(lst):
return NotImplemented
def current_time(lst):
return timestampNow()
def bitwise_and(lst):
return reduce(operator.and_, lst)
def bitwise_or(lst):
return reduce(operator.or_, lst)
def avg_int(lst):
lst = list(lst)
return sum(lst) // len(lst)
def onlyExisting(func):
"""Returns a filter func that when called with a list,
only calls func on the non-NotImplemented items of the list,
and only so if there's at least one item remaining.
Otherwise returns NotImplemented."""
def wrapper(lst):
items = [item for item in lst if item is not NotImplemented]
return func(items) if items else NotImplemented
return wrapper
def sumLists(lst):
l = []
for item in lst:
return l
def sumDicts(lst):
d = {}
for item in lst:
return d
def mergeObjects(lst):
lst = [item for item in lst if item is not NotImplemented]
if not lst:
return NotImplemented
lst = [item for item in lst if item is not None]
if not lst:
return None
clazz = lst[0].__class__
assert all(type(item) == clazz for item in lst), lst
logic = clazz.mergeMap
returnTable = clazz()
returnDict = {}
allKeys = set.union(set(), *(vars(table).keys() for table in lst))
for key in allKeys:
mergeLogic = logic[key]
except KeyError:
mergeLogic = logic['*']
except KeyError:
raise Exception("Don't know how to merge key %s of class %s" %
(key, clazz.__name__))
if mergeLogic is NotImplemented:
value = mergeLogic(getattr(table, key, NotImplemented) for table in lst)
if value is not NotImplemented:
returnDict[key] = value
returnTable.__dict__ = returnDict
return returnTable
def mergeBits(bitmap):
def wrapper(lst):
lst = list(lst)
returnValue = 0
for bitNumber in range(bitmap['size']):
mergeLogic = bitmap[bitNumber]
except KeyError:
mergeLogic = bitmap['*']
except KeyError:
raise Exception("Don't know how to merge bit %s" % bitNumber)
shiftedBit = 1 << bitNumber
mergedValue = mergeLogic(bool(item & shiftedBit) for item in lst)
returnValue |= mergedValue << bitNumber
return returnValue
return wrapper
@_add_method(DefaultTable, allowDefaultTable=True)
def merge(self, m, tables):
if not hasattr(self, 'mergeMap'):"Don't know how to merge '%s'.", self.tableTag)
return NotImplemented
logic = self.mergeMap
if isinstance(logic, dict):
return m.mergeObjects(self, self.mergeMap, tables)
return logic(tables)
ttLib.getTableClass('maxp').mergeMap = {
'*': max,
'tableTag': equal,
'tableVersion': equal,
'numGlyphs': sum,
'maxStorage': first,
'maxFunctionDefs': first,
'maxInstructionDefs': first,
# TODO When we correctly merge hinting data, update these values:
# maxFunctionDefs, maxInstructionDefs, maxSizeOfInstructions
headFlagsMergeBitMap = {
'size': 16,
'*': bitwise_or,
1: bitwise_and, # Baseline at y = 0
2: bitwise_and, # lsb at x = 0
3: bitwise_and, # Force ppem to integer values. FIXME?
5: bitwise_and, # Font is vertical
6: lambda bit: 0, # Always set to zero
11: bitwise_and, # Font data is 'lossless'
13: bitwise_and, # Optimized for ClearType
14: bitwise_and, # Last resort font. FIXME? equal or first may be better
15: lambda bit: 0, # Always set to zero
ttLib.getTableClass('head').mergeMap = {
'tableTag': equal,
'tableVersion': max,
'fontRevision': max,
'checkSumAdjustment': lambda lst: 0, # We need *something* here
'magicNumber': equal,
'flags': mergeBits(headFlagsMergeBitMap),
'unitsPerEm': equal,
'created': current_time,
'modified': current_time,
'xMin': min,
'yMin': min,
'xMax': max,
'yMax': max,
'macStyle': first,
'lowestRecPPEM': max,
'fontDirectionHint': lambda lst: 2,
'indexToLocFormat': recalculate,
'glyphDataFormat': equal,
ttLib.getTableClass('hhea').mergeMap = {
'*': equal,
'tableTag': equal,
'tableVersion': max,
'ascent': max,
'descent': min,
'lineGap': max,
'advanceWidthMax': max,
'minLeftSideBearing': min,
'minRightSideBearing': min,
'xMaxExtent': max,
'caretSlopeRise': first,
'caretSlopeRun': first,
'caretOffset': first,
'numberOfHMetrics': recalculate,
ttLib.getTableClass('vhea').mergeMap = {
'*': equal,
'tableTag': equal,
'tableVersion': max,
'ascent': max,
'descent': min,
'lineGap': max,
'advanceHeightMax': max,
'minTopSideBearing': min,
'minBottomSideBearing': min,
'yMaxExtent': max,
'caretSlopeRise': first,
'caretSlopeRun': first,
'caretOffset': first,
'numberOfVMetrics': recalculate,
os2FsTypeMergeBitMap = {
'size': 16,
'*': lambda bit: 0,
1: bitwise_or, # no embedding permitted
2: bitwise_and, # allow previewing and printing documents
3: bitwise_and, # allow editing documents
8: bitwise_or, # no subsetting permitted
9: bitwise_or, # no embedding of outlines permitted
def mergeOs2FsType(lst):
lst = list(lst)
if all(item == 0 for item in lst):
return 0
# Compute least restrictive logic for each fsType value
for i in range(len(lst)):
# unset bit 1 (no embedding permitted) if either bit 2 or 3 is set
if lst[i] & 0x000C:
lst[i] &= ~0x0002
# set bit 2 (allow previewing) if bit 3 is set (allow editing)
elif lst[i] & 0x0008:
lst[i] |= 0x0004
# set bits 2 and 3 if everything is allowed
elif lst[i] == 0:
lst[i] = 0x000C
fsType = mergeBits(os2FsTypeMergeBitMap)(lst)
# unset bits 2 and 3 if bit 1 is set (some font is "no embedding")
if fsType & 0x0002:
fsType &= ~0x000C
return fsType
ttLib.getTableClass('OS/2').mergeMap = {
'*': first,
'tableTag': equal,
'version': max,
'xAvgCharWidth': avg_int, # Apparently fontTools doesn't recalc this
'fsType': mergeOs2FsType, # Will be overwritten
'panose': first, # FIXME: should really be the first Latin font
'ulUnicodeRange1': bitwise_or,
'ulUnicodeRange2': bitwise_or,
'ulUnicodeRange3': bitwise_or,
'ulUnicodeRange4': bitwise_or,
'fsFirstCharIndex': min,
'fsLastCharIndex': max,
'sTypoAscender': max,
'sTypoDescender': min,
'sTypoLineGap': max,
'usWinAscent': max,
'usWinDescent': max,
# Version 2,3,4
'ulCodePageRange1': onlyExisting(bitwise_or),
'ulCodePageRange2': onlyExisting(bitwise_or),
'usMaxContex': onlyExisting(max),
# TODO version 5
def merge(self, m, tables):
DefaultTable.merge(self, m, tables)
if self.version < 2:
# bits 8 and 9 are reserved and should be set to zero
self.fsType &= ~0x0300
if self.version >= 3:
# Only one of bits 1, 2, and 3 may be set. We already take
# care of bit 1 implications in mergeOs2FsType. So unset
# bit 2 if bit 3 is already set.
if self.fsType & 0x0008:
self.fsType &= ~0x0004
return self
ttLib.getTableClass('post').mergeMap = {
'*': first,
'tableTag': equal,
'formatType': max,
'isFixedPitch': min,
'minMemType42': max,
'maxMemType42': lambda lst: 0,
'minMemType1': max,
'maxMemType1': lambda lst: 0,
'mapping': onlyExisting(sumDicts),
'extraNames': lambda lst: [],
ttLib.getTableClass('vmtx').mergeMap = ttLib.getTableClass('hmtx').mergeMap = {
'tableTag': equal,
'metrics': sumDicts,
ttLib.getTableClass('name').mergeMap = {
'tableTag': equal,
'names': first, # FIXME? Does mixing name records make sense?
ttLib.getTableClass('loca').mergeMap = {
'*': recalculate,
'tableTag': equal,
ttLib.getTableClass('glyf').mergeMap = {
'tableTag': equal,
'glyphs': sumDicts,
'glyphOrder': sumLists,
def merge(self, m, tables):
for i,table in enumerate(tables):
for g in table.glyphs.values():
if i:
# Drop hints for all but first font, since
# we don't map functions / CVT values.
# Expand composite glyphs to load their
# composite glyph names.
if g.isComposite():
return DefaultTable.merge(self, m, tables)
ttLib.getTableClass('prep').mergeMap = lambda self, lst: first(lst)
ttLib.getTableClass('fpgm').mergeMap = lambda self, lst: first(lst)
ttLib.getTableClass('cvt ').mergeMap = lambda self, lst: first(lst)
ttLib.getTableClass('gasp').mergeMap = lambda self, lst: first(lst) # FIXME? Appears irreconcilable
def _glyphsAreSame(glyphSet1, glyphSet2, glyph1, glyph2):
pen1 = DecomposingRecordingPen(glyphSet1)
pen2 = DecomposingRecordingPen(glyphSet2)
g1 = glyphSet1[glyph1]
g2 = glyphSet2[glyph2]
return (pen1.value == pen2.value and
g1.width == g2.width and
(not hasattr(g1, 'height') or g1.height == g2.height))
# Valid (format, platformID, platEncID) triplets for cmap subtables containing
# Unicode BMP-only and Unicode Full Repertoire semantics.
# Cf. OpenType spec for "Platform specific encodings":
class CmapUnicodePlatEncodings:
BMP = {(4, 3, 1), (4, 0, 3), (4, 0, 4), (4, 0, 6)}
FullRepertoire = {(12, 3, 10), (12, 0, 4), (12, 0, 6)}
def merge(self, m, tables):
# TODO Handle format=14.
# Only merge format 4 and 12 Unicode subtables, ignores all other subtables
# If there is a format 12 table for the same font, ignore the format 4 table
cmapTables = []
for fontIdx,table in enumerate(tables):
format4 = None
format12 = None
for subtable in table.tables:
properties = (subtable.format, subtable.platformID, subtable.platEncID)
if properties in CmapUnicodePlatEncodings.BMP:
format4 = subtable
elif properties in CmapUnicodePlatEncodings.FullRepertoire:
format12 = subtable
"Dropped cmap subtable from font [%s]:\t"
"format %2s, platformID %2s, platEncID %2s",
fontIdx, subtable.format, subtable.platformID, subtable.platEncID
if format12 is not None:
cmapTables.append((format12, fontIdx))
elif format4 is not None:
cmapTables.append((format4, fontIdx))
# Build a unicode mapping, then decide which format is needed to store it.
cmap = {}
fontIndexForGlyph = {}
glyphSets = [None for f in m.fonts] if hasattr(m, 'fonts') else None
for table,fontIdx in cmapTables:
# handle duplicates
for uni,gid in table.cmap.items():
oldgid = cmap.get(uni, None)
if oldgid is None:
cmap[uni] = gid
fontIndexForGlyph[gid] = fontIdx
elif oldgid != gid:
# Char previously mapped to oldgid, now to gid.
# Record, to fix up in GSUB 'locl' later.
if m.duplicateGlyphsPerFont[fontIdx].get(oldgid) is None:
if glyphSets is not None:
oldFontIdx = fontIndexForGlyph[oldgid]
for idx in (fontIdx, oldFontIdx):
if glyphSets[idx] is None:
glyphSets[idx] = m.fonts[idx].getGlyphSet()
if _glyphsAreSame(glyphSets[oldFontIdx], glyphSets[fontIdx], oldgid, gid):
m.duplicateGlyphsPerFont[fontIdx][oldgid] = gid
elif m.duplicateGlyphsPerFont[fontIdx][oldgid] != gid:
# Char previously mapped to oldgid but oldgid is already remapped to a different
# gid, because of another Unicode character.
# TODO: Try harder to do something about these.
log.warning("Dropped mapping from codepoint %#06X to glyphId '%s'", uni, gid)
cmapBmpOnly = {uni: gid for uni,gid in cmap.items() if uni <= 0xFFFF}
self.tables = []
module = ttLib.getTableModule('cmap')
if len(cmapBmpOnly) != len(cmap):
# format-12 required.
cmapTable = module.cmap_classes[12](12)
cmapTable.platformID = 3
cmapTable.platEncID = 10
cmapTable.language = 0
cmapTable.cmap = cmap
# always create format-4
cmapTable = module.cmap_classes[4](4)
cmapTable.platformID = 3
cmapTable.platEncID = 1
cmapTable.language = 0
cmapTable.cmap = cmapBmpOnly
# ordered by platform then encoding
self.tables.insert(0, cmapTable)
self.tableVersion = 0
self.numSubTables = len(self.tables)
return self
def mergeLookupLists(lst):
# TODO Do smarter merge.
return sumLists(lst)
def mergeFeatures(lst):
assert lst
self = otTables.Feature()
self.FeatureParams = None
self.LookupListIndex = mergeLookupLists([l.LookupListIndex for l in lst if l.LookupListIndex])
self.LookupCount = len(self.LookupListIndex)
return self
def mergeFeatureLists(lst):
d = {}
for l in lst:
for f in l:
tag = f.FeatureTag
if tag not in d:
d[tag] = []
ret = []
for tag in sorted(d.keys()):
rec = otTables.FeatureRecord()
rec.FeatureTag = tag
rec.Feature = mergeFeatures(d[tag])
return ret
def mergeLangSyses(lst):
assert lst
# TODO Support merging ReqFeatureIndex
assert all(l.ReqFeatureIndex == 0xFFFF for l in lst)
self = otTables.LangSys()
self.LookupOrder = None
self.ReqFeatureIndex = 0xFFFF
self.FeatureIndex = mergeFeatureLists([l.FeatureIndex for l in lst if l.FeatureIndex])
self.FeatureCount = len(self.FeatureIndex)
return self
def mergeScripts(lst):
assert lst
if len(lst) == 1:
return lst[0]
langSyses = {}
for sr in lst:
for lsr in sr.LangSysRecord:
if lsr.LangSysTag not in langSyses:
langSyses[lsr.LangSysTag] = []
lsrecords = []
for tag, langSys_list in sorted(langSyses.items()):
lsr = otTables.LangSysRecord()
lsr.LangSys = mergeLangSyses(langSys_list)
lsr.LangSysTag = tag
self = otTables.Script()
self.LangSysRecord = lsrecords
self.LangSysCount = len(lsrecords)
dfltLangSyses = [s.DefaultLangSys for s in lst if s.DefaultLangSys]
if dfltLangSyses:
self.DefaultLangSys = mergeLangSyses(dfltLangSyses)
self.DefaultLangSys = None
return self
def mergeScriptRecords(lst):
d = {}
for l in lst:
for s in l:
tag = s.ScriptTag
if tag not in d:
d[tag] = []
ret = []
for tag in sorted(d.keys()):
rec = otTables.ScriptRecord()
rec.ScriptTag = tag
rec.Script = mergeScripts(d[tag])
return ret
otTables.ScriptList.mergeMap = {
'ScriptCount': lambda lst: None, # TODO
'ScriptRecord': mergeScriptRecords,
otTables.BaseScriptList.mergeMap = {
'BaseScriptCount': lambda lst: None, # TODO
# TODO: Merge duplicate entries
'BaseScriptRecord': lambda lst: sorted(sumLists(lst), key=lambda s: s.BaseScriptTag),
otTables.FeatureList.mergeMap = {
'FeatureCount': sum,
'FeatureRecord': lambda lst: sorted(sumLists(lst), key=lambda s: s.FeatureTag),
otTables.LookupList.mergeMap = {
'LookupCount': sum,
'Lookup': sumLists,
otTables.Coverage.mergeMap = {
'Format': min,
'glyphs': sumLists,
otTables.ClassDef.mergeMap = {
'Format': min,
'classDefs': sumDicts,
otTables.LigCaretList.mergeMap = {
'Coverage': mergeObjects,
'LigGlyphCount': sum,
'LigGlyph': sumLists,
otTables.AttachList.mergeMap = {
'Coverage': mergeObjects,
'GlyphCount': sum,
'AttachPoint': sumLists,
# XXX Renumber MarkFilterSets of lookups
otTables.MarkGlyphSetsDef.mergeMap = {
'MarkSetTableFormat': equal,
'MarkSetCount': sum,
'Coverage': sumLists,
otTables.Axis.mergeMap = {
'*': mergeObjects,
# XXX Fix BASE table merging
otTables.BaseTagList.mergeMap = {
'BaseTagCount': sum,
'BaselineTag': sumLists,
otTables.GDEF.mergeMap = \
otTables.GSUB.mergeMap = \
otTables.GPOS.mergeMap = \
otTables.BASE.mergeMap = \
otTables.JSTF.mergeMap = \
otTables.MATH.mergeMap = \
'*': mergeObjects,
'Version': max,
ttLib.getTableClass('GDEF').mergeMap = \
ttLib.getTableClass('GSUB').mergeMap = \
ttLib.getTableClass('GPOS').mergeMap = \
ttLib.getTableClass('BASE').mergeMap = \
ttLib.getTableClass('JSTF').mergeMap = \
ttLib.getTableClass('MATH').mergeMap = \
'tableTag': onlyExisting(equal), # XXX clean me up
'table': mergeObjects,
def merge(self, m, tables):
assert len(tables) == len(m.duplicateGlyphsPerFont)
for i,(table,dups) in enumerate(zip(tables, m.duplicateGlyphsPerFont)):
if not dups: continue
assert (table is not None and table is not NotImplemented), "Have duplicates to resolve for font %d but no GSUB: %s" % (i + 1, dups)
synthFeature = None
synthLookup = None
for script in table.table.ScriptList.ScriptRecord:
if script.ScriptTag == 'DFLT': continue # XXX
for langsys in [script.Script.DefaultLangSys] + [l.LangSys for l in script.Script.LangSysRecord]:
if langsys is None: continue # XXX Create!
feature = [v for v in langsys.FeatureIndex if v.FeatureTag == 'locl']
assert len(feature) <= 1
if feature:
feature = feature[0]
if not synthFeature:
synthFeature = otTables.FeatureRecord()
synthFeature.FeatureTag = 'locl'
f = synthFeature.Feature = otTables.Feature()
f.FeatureParams = None
f.LookupCount = 0
f.LookupListIndex = []
langsys.FeatureIndex.sort(key=lambda v: v.FeatureTag)
table.table.FeatureList.FeatureCount += 1
feature = synthFeature
if not synthLookup:
subtable = otTables.SingleSubst()
subtable.mapping = dups
synthLookup = otTables.Lookup()
synthLookup.LookupFlag = 0
synthLookup.LookupType = 1
synthLookup.SubTableCount = 1
synthLookup.SubTable = [subtable]
if table.table.LookupList is None:
# mtiLib uses None as default value for LookupList,
# while feaLib points to an empty array with count 0
# TODO: make them do the same
table.table.LookupList = otTables.LookupList()
table.table.LookupList.Lookup = []
table.table.LookupList.LookupCount = 0
table.table.LookupList.LookupCount += 1
feature.Feature.LookupListIndex[:0] = [synthLookup]
feature.Feature.LookupCount += 1
DefaultTable.merge(self, m, tables)
return self
def mapLookups(self, lookupMap):
# Copied and trimmed down from
def __merge_classify_context(self):
class ContextHelper(object):
def __init__(self, klass, Format):
if klass.__name__.endswith('Subst'):
Typ = 'Sub'
Type = 'Subst'
Typ = 'Pos'
Type = 'Pos'
if klass.__name__.startswith('Chain'):
Chain = 'Chain'
Chain = ''
ChainTyp = Chain+Typ
self.Typ = Typ
self.Type = Type
self.Chain = Chain
self.ChainTyp = ChainTyp
self.LookupRecord = Type+'LookupRecord'
if Format == 1:
self.Rule = ChainTyp+'Rule'
self.RuleSet = ChainTyp+'RuleSet'
elif Format == 2:
self.Rule = ChainTyp+'ClassRule'
self.RuleSet = ChainTyp+'ClassSet'
if self.Format not in [1, 2, 3]:
return None # Don't shoot the messenger; let it go
if not hasattr(self.__class__, "__ContextHelpers"):
self.__class__.__ContextHelpers = {}
if self.Format not in self.__class__.__ContextHelpers:
helper = ContextHelper(self.__class__, self.Format)
self.__class__.__ContextHelpers[self.Format] = helper
return self.__class__.__ContextHelpers[self.Format]
def mapLookups(self, lookupMap):
c = self.__merge_classify_context()
if self.Format in [1, 2]:
for rs in getattr(self, c.RuleSet):
if not rs: continue
for r in getattr(rs, c.Rule):
if not r: continue
for ll in getattr(r, c.LookupRecord):
if not ll: continue
ll.LookupListIndex = lookupMap[ll.LookupListIndex]
elif self.Format == 3:
for ll in getattr(self, c.LookupRecord):
if not ll: continue
ll.LookupListIndex = lookupMap[ll.LookupListIndex]
assert 0, "unknown format: %s" % self.Format
def mapLookups(self, lookupMap):
if self.Format == 1:
assert 0, "unknown format: %s" % self.Format
def mapLookups(self, lookupMap):
for st in self.SubTable:
if not st: continue
def mapLookups(self, lookupMap):
for l in self.Lookup:
if not l: continue
def mapLookups(self, lookupMap):
self.LookupListIndex = [lookupMap[i] for i in self.LookupListIndex]
def mapLookups(self, lookupMap):
for f in self.FeatureRecord:
if not f or not f.Feature: continue
def mapFeatures(self, featureMap):
self.FeatureIndex = [featureMap[i] for i in self.FeatureIndex]
if self.ReqFeatureIndex != 65535:
self.ReqFeatureIndex = featureMap[self.ReqFeatureIndex]
def mapFeatures(self, featureMap):
if self.DefaultLangSys:
for l in self.LangSysRecord:
if not l or not l.LangSys: continue
def mapFeatures(self, featureMap):
for s in self.ScriptRecord:
if not s or not s.Script: continue
class Options(object):
class UnknownOptionError(Exception):
def __init__(self, **kwargs):
self.verbose = False
self.timing = False
def set(self, **kwargs):
for k,v in kwargs.items():
if not hasattr(self, k):
raise self.UnknownOptionError("Unknown option '%s'" % k)
setattr(self, k, v)
def parse_opts(self, argv, ignore_unknown=[]):
ret = []
opts = {}
for a in argv:
orig_a = a
if not a.startswith('--'):
a = a[2:]
i = a.find('=')
op = '='
if i == -1:
if a.startswith("no-"):
k = a[3:]
v = False
k = a
v = True
k = a[:i]
if k[-1] in "-+":
op = k[-1]+'=' # Ops is '-=' or '+=' now.
k = k[:-1]
v = a[i+1:]
k = k.replace('-', '_')
if not hasattr(self, k):
if ignore_unknown is True or k in ignore_unknown:
raise self.UnknownOptionError("Unknown option '%s'" % a)
ov = getattr(self, k)
if isinstance(ov, bool):
v = bool(v)
elif isinstance(ov, int):
v = int(v)
elif isinstance(ov, list):
vv = v.split(',')
if vv == ['']:
vv = []
vv = [int(x, 0) if len(x) and x[0] in "0123456789" else x for x in vv]
if op == '=':
v = vv
elif op == '+=':
v = ov
elif op == '-=':
v = ov
for x in vv:
if x in v:
assert 0
opts[k] = v
return ret
class _AttendanceRecordingIdentityDict(object):
"""A dictionary-like object that records indices of items actually accessed
from a list."""
def __init__(self, lst):
self.l = lst
self.d = {id(v):i for i,v in enumerate(lst)}
self.s = set()
def __getitem__(self, v):
return v
class _GregariousIdentityDict(object):
"""A dictionary-like object that welcomes guests without reservations and
adds them to the end of the guest list."""
def __init__(self, lst):
self.l = lst
self.s = set(id(v) for v in lst)
def __getitem__(self, v):
if id(v) not in self.s:
return v
class _NonhashableDict(object):
"""A dictionary-like object mapping objects to values."""
def __init__(self, keys, values=None):
if values is None:
self.d = {id(v):i for i,v in enumerate(keys)}
self.d = {id(k):v for k,v in zip(keys, values)}
def __getitem__(self, k):
return self.d[id(k)]
def __setitem__(self, k, v):
self.d[id(k)] = v
def __delitem__(self, k):
del self.d[id(k)]
class Merger(object):
def __init__(self, options=None):
if not options:
options = Options()
self.options = options
def merge(self, fontfiles):
mega = ttLib.TTFont()
# Settle on a mega glyph order.
fonts = [ttLib.TTFont(fontfile) for fontfile in fontfiles]
glyphOrders = [font.getGlyphOrder() for font in fonts]
megaGlyphOrder = self._mergeGlyphOrders(glyphOrders)
# Reload fonts and set new glyph names on them.
# TODO Is it necessary to reload font? I think it is. At least
# it's safer, in case tables were loaded to provide glyph names.
fonts = [ttLib.TTFont(fontfile) for fontfile in fontfiles]
for font,glyphOrder in zip(fonts, glyphOrders):
for font in fonts:
self.fonts = fonts
self.duplicateGlyphsPerFont = [{} for f in fonts]
allTags = reduce(set.union, (list(font.keys()) for font in fonts), set())
# Make sure we process cmap before GSUB as we have a dependency there.
if 'GSUB' in allTags:
allTags = ['GSUB'] + list(allTags)
if 'cmap' in allTags:
allTags = ['cmap'] + list(allTags)
for tag in allTags:
with timer("merge '%s'" % tag):
tables = [font.get(tag, NotImplemented) for font in fonts]"Merging '%s'.", tag)
clazz = ttLib.getTableClass(tag)
table = clazz(tag).merge(self, tables)
# XXX Clean this up and use: table = mergeObjects(tables)
if table is not NotImplemented and table is not False:
mega[tag] = table"Merged '%s'.", tag)
else:"Dropped '%s'.", tag)
del self.duplicateGlyphsPerFont
del self.fonts
return mega
def _mergeGlyphOrders(self, glyphOrders):
"""Modifies passed-in glyphOrders to reflect new glyph names.
Returns glyphOrder for the merged font."""
# Simply append font index to the glyph name for now.
# TODO Even this simplistic numbering can result in conflicts.
# But then again, we have to improve this soon anyway.
mega = []
for n,glyphOrder in enumerate(glyphOrders):
for i,glyphName in enumerate(glyphOrder):
glyphName += "#" + repr(n)
glyphOrder[i] = glyphName
return mega
def mergeObjects(self, returnTable, logic, tables):
# Right now we don't use self at all. Will use in the future
# for options and logging.
allKeys = set.union(set(), *(vars(table).keys() for table in tables if table is not NotImplemented))
for key in allKeys:
mergeLogic = logic[key]
except KeyError:
mergeLogic = logic['*']
except KeyError:
raise Exception("Don't know how to merge key %s of class %s" %
(key, returnTable.__class__.__name__))
if mergeLogic is NotImplemented:
value = mergeLogic(getattr(table, key, NotImplemented) for table in tables)
if value is not NotImplemented:
setattr(returnTable, key, value)
return returnTable
def _preMerge(self, font):
# Map indices to references
GDEF = font.get('GDEF')
GSUB = font.get('GSUB')
GPOS = font.get('GPOS')
for t in [GSUB, GPOS]:
if not t: continue
if t.table.LookupList:
lookupMap = {i:v for i,v in enumerate(t.table.LookupList.Lookup)}
if t.table.FeatureList and t.table.ScriptList:
featureMap = {i:v for i,v in enumerate(t.table.FeatureList.FeatureRecord)}
# TODO GDEF/Lookup MarkFilteringSets
# TODO FeatureParams nameIDs
def _postMerge(self, font):
# Map references back to indices
GDEF = font.get('GDEF')
GSUB = font.get('GSUB')
GPOS = font.get('GPOS')
for t in [GSUB, GPOS]:
if not t: continue
if t.table.FeatureList and t.table.ScriptList:
# Collect unregistered (new) features.
featureMap = _GregariousIdentityDict(t.table.FeatureList.FeatureRecord)
# Record used features.
featureMap = _AttendanceRecordingIdentityDict(t.table.FeatureList.FeatureRecord)
usedIndices = featureMap.s
# Remove unused features
t.table.FeatureList.FeatureRecord = [f for i,f in enumerate(t.table.FeatureList.FeatureRecord) if i in usedIndices]
# Map back to indices.
featureMap = _NonhashableDict(t.table.FeatureList.FeatureRecord)
t.table.FeatureList.FeatureCount = len(t.table.FeatureList.FeatureRecord)
if t.table.LookupList:
# Collect unregistered (new) lookups.
lookupMap = _GregariousIdentityDict(t.table.LookupList.Lookup)
# Record used lookups.
lookupMap = _AttendanceRecordingIdentityDict(t.table.LookupList.Lookup)
usedIndices = lookupMap.s
# Remove unused lookups
t.table.LookupList.Lookup = [l for i,l in enumerate(t.table.LookupList.Lookup) if i in usedIndices]
# Map back to indices.
lookupMap = _NonhashableDict(t.table.LookupList.Lookup)
t.table.LookupList.LookupCount = len(t.table.LookupList.Lookup)
# TODO GDEF/Lookup MarkFilteringSets
# TODO FeatureParams nameIDs
__all__ = [
@timer("make one with everything (TOTAL TIME)")
def main(args=None):
from fontTools import configLogger
if args is None:
args = sys.argv[1:]
options = Options()
args = options.parse_opts(args)
if len(args) < 1:
print("usage: pyftmerge font...", file=sys.stderr)
return 1
configLogger(level=logging.INFO if options.verbose else logging.WARNING)
if options.timing:
timer.logger.disabled = True
merger = Merger(options=options)
font = merger.merge(args)
outfile = 'merged.ttf'
with timer("compile and save font"):
if __name__ == "__main__":