479b52e13d
Just such that their existing .Format is preserved, as that is written out to the XML file, and would break the test suite if not there. Stupid to write Coverage Format to XML. Oh well...
967 lines
29 KiB
Python
967 lines
29 KiB
Python
"""
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Merge OpenType Layout tables (GDEF / GPOS / GSUB).
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"""
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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.misc.fixedTools import otRound
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from fontTools.misc import classifyTools
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from fontTools.ttLib.tables import otTables as ot
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from fontTools.ttLib.tables import otBase as otBase
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from fontTools.ttLib.tables.DefaultTable import DefaultTable
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from fontTools.varLib import builder, models, varStore
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from fontTools.varLib.models import nonNone, allSame, allSameAs
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from fontTools.varLib.varStore import VarStoreInstancer
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from functools import reduce
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class Merger(object):
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def __init__(self, font=None):
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self.font = font
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@classmethod
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def merger(celf, clazzes, attrs=(None,)):
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assert celf != Merger, 'Subclass Merger instead.'
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if 'mergers' not in celf.__dict__:
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celf.mergers = {}
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if type(clazzes) == type:
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clazzes = (clazzes,)
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if type(attrs) == str:
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attrs = (attrs,)
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def wrapper(method):
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assert method.__name__ == 'merge'
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done = []
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for clazz in clazzes:
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if clazz in done: continue # Support multiple names of a clazz
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done.append(clazz)
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mergers = celf.mergers.setdefault(clazz, {})
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for attr in attrs:
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assert attr not in mergers, \
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"Oops, class '%s' has merge function for '%s' defined already." % (clazz.__name__, attr)
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mergers[attr] = method
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return None
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return wrapper
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@classmethod
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def mergersFor(celf, thing, _default={}):
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typ = type(thing)
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for celf in celf.mro():
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mergers = getattr(celf, 'mergers', None)
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if mergers is None:
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break;
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m = celf.mergers.get(typ, None)
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if m is not None:
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return m
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return _default
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def mergeObjects(self, out, lst, exclude=()):
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keys = sorted(vars(out).keys())
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assert all(keys == sorted(vars(v).keys()) for v in lst), \
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(keys, [sorted(vars(v).keys()) for v in lst])
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mergers = self.mergersFor(out)
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defaultMerger = mergers.get('*', self.__class__.mergeThings)
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try:
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for key in keys:
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if key in exclude: continue
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value = getattr(out, key)
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values = [getattr(table, key) for table in lst]
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mergerFunc = mergers.get(key, defaultMerger)
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mergerFunc(self, value, values)
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except Exception as e:
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e.args = e.args + ('.'+key,)
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raise
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def mergeLists(self, out, lst):
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count = len(out)
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assert all(count == len(v) for v in lst), (count, [len(v) for v in lst])
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for i,(value,values) in enumerate(zip(out, zip(*lst))):
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try:
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self.mergeThings(value, values)
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except Exception as e:
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e.args = e.args + ('[%d]' % i,)
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raise
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def mergeThings(self, out, lst):
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clazz = type(out)
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try:
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assert all(type(item) == clazz for item in lst), (out, lst)
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mergerFunc = self.mergersFor(out).get(None, None)
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if mergerFunc is not None:
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mergerFunc(self, out, lst)
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elif hasattr(out, '__dict__'):
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self.mergeObjects(out, lst)
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elif isinstance(out, list):
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self.mergeLists(out, lst)
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else:
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assert all(out == v for v in lst), (out, lst)
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except Exception as e:
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e.args = e.args + (clazz.__name__,)
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raise
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def mergeTables(self, font, master_ttfs, tableTags):
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for tag in tableTags:
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if tag not in font: continue
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self.mergeThings(font[tag], [m[tag] if tag in m else None
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for m in master_ttfs])
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#
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# Aligning merger
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#
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class AligningMerger(Merger):
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pass
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def _SinglePosUpgradeToFormat2(self):
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if self.Format == 2: return self
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ret = ot.SinglePos()
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ret.Format = 2
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ret.Coverage = self.Coverage
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ret.ValueFormat = self.ValueFormat
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ret.Value = [self.Value for g in ret.Coverage.glyphs]
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ret.ValueCount = len(ret.Value)
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return ret
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def _merge_GlyphOrders(font, lst, values_lst=None, default=None):
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"""Takes font and list of glyph lists (must be sorted by glyph id), and returns
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two things:
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- Combined glyph list,
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- If values_lst is None, return input glyph lists, but padded with None when a glyph
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was missing in a list. Otherwise, return values_lst list-of-list, padded with None
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to match combined glyph lists.
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"""
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if values_lst is None:
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dict_sets = [set(l) for l in lst]
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else:
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dict_sets = [{g:v for g,v in zip(l,vs)} for l,vs in zip(lst,values_lst)]
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combined = set()
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combined.update(*dict_sets)
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sortKey = font.getReverseGlyphMap().__getitem__
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order = sorted(combined, key=sortKey)
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# Make sure all input glyphsets were in proper order
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assert all(sorted(vs, key=sortKey) == vs for vs in lst)
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del combined
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paddedValues = None
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if values_lst is None:
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padded = [[glyph if glyph in dict_set else default
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for glyph in order]
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for dict_set in dict_sets]
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else:
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assert len(lst) == len(values_lst)
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padded = [[dict_set[glyph] if glyph in dict_set else default
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for glyph in order]
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for dict_set in dict_sets]
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return order, padded
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def _Lookup_SinglePos_get_effective_value(subtables, glyph):
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for self in subtables:
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if self is None or \
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type(self) != ot.SinglePos or \
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self.Coverage is None or \
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glyph not in self.Coverage.glyphs:
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continue
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if self.Format == 1:
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return self.Value
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elif self.Format == 2:
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return self.Value[self.Coverage.glyphs.index(glyph)]
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else:
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assert 0
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return None
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def _Lookup_PairPos_get_effective_value_pair(subtables, firstGlyph, secondGlyph):
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for self in subtables:
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if self is None or \
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type(self) != ot.PairPos or \
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self.Coverage is None or \
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firstGlyph not in self.Coverage.glyphs:
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continue
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if self.Format == 1:
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ps = self.PairSet[self.Coverage.glyphs.index(firstGlyph)]
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pvr = ps.PairValueRecord
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for rec in pvr: # TODO Speed up
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if rec.SecondGlyph == secondGlyph:
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return rec
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continue
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elif self.Format == 2:
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klass1 = self.ClassDef1.classDefs.get(firstGlyph, 0)
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klass2 = self.ClassDef2.classDefs.get(secondGlyph, 0)
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return self.Class1Record[klass1].Class2Record[klass2]
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else:
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assert 0
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return None
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@AligningMerger.merger(ot.ClassDef)
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def merge(merger, self, lst):
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self.classDefs = {}
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# We only care about the .classDefs
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self = self.classDefs
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lst = [l.classDefs for l in lst]
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allKeys = set()
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allKeys.update(*[l.keys() for l in lst])
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for k in allKeys:
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allValues = nonNone(l.get(k) for l in lst)
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assert allSame(allValues), allValues
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if not allValues:
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self[k] = None
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else:
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self[k] = allValues[0]
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@AligningMerger.merger(ot.SinglePos)
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def merge(merger, self, lst):
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self.ValueFormat = valueFormat = reduce(int.__or__, [l.ValueFormat for l in lst], 0)
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assert len(lst) == 1 or (valueFormat & ~0xF == 0), valueFormat
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# If all have same coverage table and all are format 1,
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if all(v.Format == 1 for v in lst) and all(self.Coverage.glyphs == v.Coverage.glyphs for v in lst):
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self.Value = otBase.ValueRecord(valueFormat)
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merger.mergeThings(self.Value, [v.Value for v in lst])
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self.ValueFormat = self.Value.getFormat()
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return
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# Upgrade everything to Format=2
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self.Format = 2
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lst = [_SinglePosUpgradeToFormat2(v) for v in lst]
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# Align them
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glyphs, padded = _merge_GlyphOrders(merger.font,
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[v.Coverage.glyphs for v in lst],
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[v.Value for v in lst])
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self.Coverage.glyphs = glyphs
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self.Value = [otBase.ValueRecord(valueFormat) for g in glyphs]
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self.ValueCount = len(self.Value)
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for i,values in enumerate(padded):
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for j,glyph in enumerate(glyphs):
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if values[j] is not None: continue
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# Fill in value from other subtables
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# Note!!! This *might* result in behavior change if ValueFormat2-zeroedness
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# is different between used subtable and current subtable!
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# TODO(behdad) Check and warn if that happens?
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v = _Lookup_SinglePos_get_effective_value(merger.lookup_subtables[i], glyph)
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if v is None:
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v = otBase.ValueRecord(valueFormat)
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values[j] = v
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merger.mergeLists(self.Value, padded)
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# Merge everything else; though, there shouldn't be anything else. :)
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merger.mergeObjects(self, lst,
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exclude=('Format', 'Coverage', 'Value', 'ValueCount'))
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self.ValueFormat = reduce(int.__or__, [v.getFormat() for v in self.Value], 0)
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@AligningMerger.merger(ot.PairSet)
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def merge(merger, self, lst):
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# Align them
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glyphs, padded = _merge_GlyphOrders(merger.font,
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[[v.SecondGlyph for v in vs.PairValueRecord] for vs in lst],
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[vs.PairValueRecord for vs in lst])
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self.PairValueRecord = pvrs = []
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for glyph in glyphs:
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pvr = ot.PairValueRecord()
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pvr.SecondGlyph = glyph
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pvr.Value1 = otBase.ValueRecord(merger.valueFormat1) if merger.valueFormat1 else None
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pvr.Value2 = otBase.ValueRecord(merger.valueFormat2) if merger.valueFormat2 else None
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pvrs.append(pvr)
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self.PairValueCount = len(self.PairValueRecord)
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for i,values in enumerate(padded):
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for j,glyph in enumerate(glyphs):
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# Fill in value from other subtables
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v = ot.PairValueRecord()
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v.SecondGlyph = glyph
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if values[j] is not None:
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vpair = values[j]
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else:
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vpair = _Lookup_PairPos_get_effective_value_pair(merger.lookup_subtables[i], self._firstGlyph, glyph)
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if vpair is None:
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v1, v2 = None, None
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else:
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v1, v2 = vpair.Value1, vpair.Value2
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v.Value1 = otBase.ValueRecord(merger.valueFormat1, src=v1) if merger.valueFormat1 else None
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v.Value2 = otBase.ValueRecord(merger.valueFormat2, src=v2) if merger.valueFormat2 else None
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values[j] = v
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del self._firstGlyph
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merger.mergeLists(self.PairValueRecord, padded)
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def _PairPosFormat1_merge(self, lst, merger):
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assert allSame([l.ValueFormat2 == 0 for l in lst if l.PairSet]), "Report bug against fonttools."
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# Merge everything else; makes sure Format is the same.
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merger.mergeObjects(self, lst,
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exclude=('Coverage',
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'PairSet', 'PairSetCount',
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'ValueFormat1', 'ValueFormat2'))
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empty = ot.PairSet()
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empty.PairValueRecord = []
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empty.PairValueCount = 0
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# Align them
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glyphs, padded = _merge_GlyphOrders(merger.font,
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[v.Coverage.glyphs for v in lst],
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[v.PairSet for v in lst],
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default=empty)
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self.Coverage.glyphs = glyphs
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self.PairSet = [ot.PairSet() for g in glyphs]
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self.PairSetCount = len(self.PairSet)
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for glyph, ps in zip(glyphs, self.PairSet):
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ps._firstGlyph = glyph
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merger.mergeLists(self.PairSet, padded)
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def _ClassDef_invert(self, allGlyphs=None):
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if isinstance(self, dict):
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classDefs = self
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else:
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classDefs = self.classDefs if self and self.classDefs else {}
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m = max(classDefs.values()) if classDefs else 0
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ret = []
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for _ in range(m + 1):
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ret.append(set())
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for k,v in classDefs.items():
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ret[v].add(k)
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# Class-0 is special. It's "everything else".
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if allGlyphs is None:
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ret[0] = None
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else:
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# Limit all classes to glyphs in allGlyphs.
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# Collect anything without a non-zero class into class=zero.
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ret[0] = class0 = set(allGlyphs)
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for s in ret[1:]:
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s.intersection_update(class0)
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class0.difference_update(s)
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return ret
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def _ClassDef_merge_classify(lst, allGlyphs=None):
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self = ot.ClassDef()
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self.classDefs = classDefs = {}
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classifier = classifyTools.Classifier()
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for l in lst:
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sets = _ClassDef_invert(l, allGlyphs=allGlyphs)
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if allGlyphs is None:
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sets = sets[1:]
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classifier.update(sets)
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classes = classifier.getClasses()
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if allGlyphs is None:
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classes.insert(0, set())
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for i,classSet in enumerate(classes):
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if i == 0:
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continue
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for g in classSet:
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classDefs[g] = i
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return self, classes
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def _ClassDef_calculate_Format(self, font):
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fmt = 2
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ranges = self._getClassRanges(font)
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if ranges:
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startGlyph = ranges[0][1]
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endGlyph = ranges[-1][3]
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glyphCount = endGlyph - startGlyph + 1
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if len(ranges) * 3 >= glyphCount + 1:
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# Format 1 is more compact
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fmt = 1
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self.Format = fmt
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def _PairPosFormat2_align_matrices(self, lst, font, transparent=False):
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matrices = [l.Class1Record for l in lst]
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# Align first classes
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self.ClassDef1, classes = _ClassDef_merge_classify([l.ClassDef1 for l in lst], allGlyphs=set(self.Coverage.glyphs))
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_ClassDef_calculate_Format(self.ClassDef1, font)
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self.Class1Count = len(classes)
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new_matrices = []
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for l,matrix in zip(lst, matrices):
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nullRow = None
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coverage = set(l.Coverage.glyphs)
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classDef1 = l.ClassDef1.classDefs
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class1Records = []
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for classSet in classes:
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exemplarGlyph = next(iter(classSet))
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if exemplarGlyph not in coverage:
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if nullRow is None:
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nullRow = ot.Class1Record()
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class2records = nullRow.Class2Record = []
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# TODO: When merger becomes selfless, revert e6125b353e1f54a0280ded5434b8e40d042de69f
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for _ in range(l.Class2Count):
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if transparent:
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rec2 = None
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else:
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rec2 = ot.Class2Record()
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rec2.Value1 = otBase.ValueRecord(self.ValueFormat1) if self.ValueFormat1 else None
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rec2.Value2 = otBase.ValueRecord(self.ValueFormat2) if self.ValueFormat2 else None
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class2records.append(rec2)
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rec1 = nullRow
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else:
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klass = classDef1.get(exemplarGlyph, 0)
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rec1 = matrix[klass] # TODO handle out-of-range?
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class1Records.append(rec1)
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new_matrices.append(class1Records)
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matrices = new_matrices
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del new_matrices
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# Align second classes
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self.ClassDef2, classes = _ClassDef_merge_classify([l.ClassDef2 for l in lst])
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_ClassDef_calculate_Format(self.ClassDef2, font)
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self.Class2Count = len(classes)
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new_matrices = []
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for l,matrix in zip(lst, matrices):
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classDef2 = l.ClassDef2.classDefs
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class1Records = []
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for rec1old in matrix:
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oldClass2Records = rec1old.Class2Record
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rec1new = ot.Class1Record()
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class2Records = rec1new.Class2Record = []
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for classSet in classes:
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if not classSet: # class=0
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rec2 = oldClass2Records[0]
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else:
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exemplarGlyph = next(iter(classSet))
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klass = classDef2.get(exemplarGlyph, 0)
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rec2 = oldClass2Records[klass]
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class2Records.append(rec2)
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class1Records.append(rec1new)
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new_matrices.append(class1Records)
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matrices = new_matrices
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del new_matrices
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return matrices
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def _PairPosFormat2_merge(self, lst, merger):
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assert allSame([l.ValueFormat2 == 0 for l in lst if l.Class1Record]), "Report bug against fonttools."
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merger.mergeObjects(self, lst,
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exclude=('Coverage',
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'ClassDef1', 'Class1Count',
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'ClassDef2', 'Class2Count',
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'Class1Record',
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'ValueFormat1', 'ValueFormat2'))
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# Align coverages
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glyphs, _ = _merge_GlyphOrders(merger.font,
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[v.Coverage.glyphs for v in lst])
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self.Coverage.glyphs = glyphs
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# Currently, if the coverage of PairPosFormat2 subtables are different,
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# we do NOT bother walking down the subtable list when filling in new
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# rows for alignment. As such, this is only correct if current subtable
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# is the last subtable in the lookup. Ensure that.
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#
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# Note that our canonicalization process merges trailing PairPosFormat2's,
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# so in reality this is rare.
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for l,subtables in zip(lst,merger.lookup_subtables):
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if l.Coverage.glyphs != glyphs:
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assert l == subtables[-1]
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matrices = _PairPosFormat2_align_matrices(self, lst, merger.font)
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self.Class1Record = list(matrices[0]) # TODO move merger to be selfless
|
|
merger.mergeLists(self.Class1Record, matrices)
|
|
|
|
@AligningMerger.merger(ot.PairPos)
|
|
def merge(merger, self, lst):
|
|
merger.valueFormat1 = self.ValueFormat1 = reduce(int.__or__, [l.ValueFormat1 for l in lst], 0)
|
|
merger.valueFormat2 = self.ValueFormat2 = reduce(int.__or__, [l.ValueFormat2 for l in lst], 0)
|
|
|
|
if self.Format == 1:
|
|
_PairPosFormat1_merge(self, lst, merger)
|
|
elif self.Format == 2:
|
|
_PairPosFormat2_merge(self, lst, merger)
|
|
else:
|
|
assert False
|
|
|
|
del merger.valueFormat1, merger.valueFormat2
|
|
|
|
# Now examine the list of value records, and update to the union of format values,
|
|
# as merge might have created new values.
|
|
vf1 = 0
|
|
vf2 = 0
|
|
if self.Format == 1:
|
|
for pairSet in self.PairSet:
|
|
for pairValueRecord in pairSet.PairValueRecord:
|
|
pv1 = pairValueRecord.Value1
|
|
if pv1 is not None:
|
|
vf1 |= pv1.getFormat()
|
|
pv2 = pairValueRecord.Value2
|
|
if pv2 is not None:
|
|
vf2 |= pv2.getFormat()
|
|
elif self.Format == 2:
|
|
for class1Record in self.Class1Record:
|
|
for class2Record in class1Record.Class2Record:
|
|
pv1 = class2Record.Value1
|
|
if pv1 is not None:
|
|
vf1 |= pv1.getFormat()
|
|
pv2 = class2Record.Value2
|
|
if pv2 is not None:
|
|
vf2 |= pv2.getFormat()
|
|
self.ValueFormat1 = vf1
|
|
self.ValueFormat2 = vf2
|
|
|
|
def _MarkBasePosFormat1_merge(self, lst, merger):
|
|
self.ClassCount = max(l.ClassCount for l in lst)
|
|
|
|
self.MarkCoverage.glyphs, MarkRecords = \
|
|
_merge_GlyphOrders(merger.font,
|
|
[l.MarkCoverage.glyphs for l in lst],
|
|
[l.MarkArray.MarkRecord for l in lst])
|
|
|
|
self.BaseCoverage.glyphs, BaseRecords = \
|
|
_merge_GlyphOrders(merger.font,
|
|
[l.BaseCoverage.glyphs for l in lst],
|
|
[l.BaseArray.BaseRecord for l in lst])
|
|
|
|
# MarkArray
|
|
self.MarkArray = ot.MarkArray()
|
|
self.MarkArray.MarkRecord = records = []
|
|
for g,glyphRecords in zip(self.MarkCoverage.glyphs, zip(*MarkRecords)):
|
|
allClasses = [r.Class for r in glyphRecords if r is not None]
|
|
|
|
# TODO Right now we require that all marks have same class in
|
|
# all masters that cover them. This is not required.
|
|
#
|
|
# We can relax that by just requiring that all marks that have
|
|
# the same class in a master, have the same class in every other
|
|
# master. Indeed, if, say, a sparse master only covers one mark,
|
|
# that mark probably will get class 0, which would possibly be
|
|
# different from its class in other masters.
|
|
#
|
|
# We can even go further and reclassify marks to support any
|
|
# input. But, since, it's unlikely that two marks being both,
|
|
# say, "top" in one master, and one being "top" and other being
|
|
# "top-right" in another master, we shouldn't do that, as any
|
|
# failures in that case will probably signify mistakes in the
|
|
# input masters.
|
|
|
|
assert allSame(allClasses), allClasses
|
|
if not allClasses:
|
|
rec = None
|
|
else:
|
|
rec = ot.MarkRecord()
|
|
rec.Class = allClasses[0]
|
|
rec.MarkAnchor = anchor = ot.Anchor()
|
|
anchor.Format = 1
|
|
merger.mergeThings(anchor,
|
|
[None if r is None else r.MarkAnchor for r in glyphRecords])
|
|
records.append(rec)
|
|
|
|
# BaseArray
|
|
self.BaseArray = ot.BaseArray()
|
|
self.BaseArray.BaseRecord = records = []
|
|
for g,glyphRecords in zip(self.BaseCoverage.glyphs, zip(*BaseRecords)):
|
|
if allSameAs(None, glyphRecords):
|
|
rec = None
|
|
else:
|
|
rec = ot.BaseRecord()
|
|
rec.BaseAnchor = anchors = []
|
|
glyphAnchors = [[] if r is None else r.BaseAnchor for r in glyphRecords]
|
|
for l in glyphAnchors:
|
|
l.extend([None] * (self.ClassCount - len(l)))
|
|
for allAnchors in zip(*glyphAnchors):
|
|
if allSameAs(None, allAnchors):
|
|
anchor = None
|
|
else:
|
|
anchor = ot.Anchor()
|
|
anchor.Format = 1
|
|
merger.mergeThings(anchor, allAnchors)
|
|
anchors.append(anchor)
|
|
records.append(rec)
|
|
|
|
@AligningMerger.merger(ot.MarkBasePos)
|
|
def merge(merger, self, lst):
|
|
assert allSameAs(self.Format, (l.Format for l in lst))
|
|
if self.Format == 1:
|
|
_MarkBasePosFormat1_merge(self, lst, merger)
|
|
else:
|
|
assert False
|
|
|
|
|
|
def _PairSet_flatten(lst, font):
|
|
self = ot.PairSet()
|
|
self.Coverage = ot.Coverage()
|
|
self.Coverage.Format = 1
|
|
|
|
# Align them
|
|
glyphs, padded = _merge_GlyphOrders(font,
|
|
[[v.SecondGlyph for v in vs.PairValueRecord] for vs in lst],
|
|
[vs.PairValueRecord for vs in lst])
|
|
|
|
self.Coverage.glyphs = glyphs
|
|
self.PairValueRecord = pvrs = []
|
|
for values in zip(*padded):
|
|
for v in values:
|
|
if v is not None:
|
|
pvrs.append(v)
|
|
break
|
|
else:
|
|
assert False
|
|
self.PairValueCount = len(self.PairValueRecord)
|
|
|
|
return self
|
|
|
|
def _Lookup_PairPosFormat1_subtables_flatten(lst, font):
|
|
assert allSame([l.ValueFormat2 == 0 for l in lst if l.PairSet]), "Report bug against fonttools."
|
|
|
|
self = ot.PairPos()
|
|
self.Format = 1
|
|
self.Coverage = ot.Coverage()
|
|
self.Coverage.Format = 1
|
|
self.ValueFormat1 = reduce(int.__or__, [l.ValueFormat1 for l in lst], 0)
|
|
self.ValueFormat2 = reduce(int.__or__, [l.ValueFormat2 for l in lst], 0)
|
|
|
|
# Align them
|
|
glyphs, padded = _merge_GlyphOrders(font,
|
|
[v.Coverage.glyphs for v in lst],
|
|
[v.PairSet for v in lst])
|
|
|
|
self.Coverage.glyphs = glyphs
|
|
self.PairSet = [_PairSet_flatten([v for v in values if v is not None], font)
|
|
for values in zip(*padded)]
|
|
self.PairSetCount = len(self.PairSet)
|
|
return self
|
|
|
|
def _Lookup_PairPosFormat2_subtables_flatten(lst, font):
|
|
assert allSame([l.ValueFormat2 == 0 for l in lst if l.Class1Record]), "Report bug against fonttools."
|
|
|
|
self = ot.PairPos()
|
|
self.Format = 2
|
|
self.Coverage = ot.Coverage()
|
|
self.Coverage.Format = 1
|
|
self.ValueFormat1 = reduce(int.__or__, [l.ValueFormat1 for l in lst], 0)
|
|
self.ValueFormat2 = reduce(int.__or__, [l.ValueFormat2 for l in lst], 0)
|
|
|
|
# Align them
|
|
glyphs, _ = _merge_GlyphOrders(font,
|
|
[v.Coverage.glyphs for v in lst])
|
|
self.Coverage.glyphs = glyphs
|
|
|
|
matrices = _PairPosFormat2_align_matrices(self, lst, font, transparent=True)
|
|
|
|
matrix = self.Class1Record = []
|
|
for rows in zip(*matrices):
|
|
row = ot.Class1Record()
|
|
matrix.append(row)
|
|
row.Class2Record = []
|
|
row = row.Class2Record
|
|
for cols in zip(*list(r.Class2Record for r in rows)):
|
|
col = next(iter(c for c in cols if c is not None))
|
|
row.append(col)
|
|
|
|
return self
|
|
|
|
def _Lookup_PairPos_subtables_canonicalize(lst, font):
|
|
"""Merge multiple Format1 subtables at the beginning of lst,
|
|
and merge multiple consecutive Format2 subtables that have the same
|
|
Class2 (ie. were split because of offset overflows). Returns new list."""
|
|
lst = list(lst)
|
|
|
|
l = len(lst)
|
|
i = 0
|
|
while i < l and lst[i].Format == 1:
|
|
i += 1
|
|
lst[:i] = [_Lookup_PairPosFormat1_subtables_flatten(lst[:i], font)]
|
|
|
|
l = len(lst)
|
|
i = l
|
|
while i > 0 and lst[i - 1].Format == 2:
|
|
i -= 1
|
|
lst[i:] = [_Lookup_PairPosFormat2_subtables_flatten(lst[i:], font)]
|
|
|
|
return lst
|
|
|
|
@AligningMerger.merger(ot.Lookup)
|
|
def merge(merger, self, lst):
|
|
subtables = merger.lookup_subtables = [l.SubTable for l in lst]
|
|
|
|
# Remove Extension subtables
|
|
for l,sts in list(zip(lst,subtables))+[(self,self.SubTable)]:
|
|
if not sts:
|
|
continue
|
|
if sts[0].__class__.__name__.startswith('Extension'):
|
|
assert allSame([st.__class__ for st in sts])
|
|
assert allSame([st.ExtensionLookupType for st in sts])
|
|
l.LookupType = sts[0].ExtensionLookupType
|
|
new_sts = [st.ExtSubTable for st in sts]
|
|
del sts[:]
|
|
sts.extend(new_sts)
|
|
|
|
isPairPos = self.SubTable and isinstance(self.SubTable[0], ot.PairPos)
|
|
|
|
if isPairPos:
|
|
|
|
# AFDKO and feaLib sometimes generate two Format1 subtables instead of one.
|
|
# Merge those before continuing.
|
|
# https://github.com/fonttools/fonttools/issues/719
|
|
self.SubTable = _Lookup_PairPos_subtables_canonicalize(self.SubTable, merger.font)
|
|
subtables = merger.lookup_subtables = [_Lookup_PairPos_subtables_canonicalize(st, merger.font) for st in subtables]
|
|
|
|
merger.mergeLists(self.SubTable, subtables)
|
|
self.SubTableCount = len(self.SubTable)
|
|
|
|
if isPairPos:
|
|
# If format-1 subtable created during canonicalization is empty, remove it.
|
|
assert len(self.SubTable) >= 1 and self.SubTable[0].Format == 1
|
|
if not self.SubTable[0].Coverage.glyphs:
|
|
self.SubTable.pop(0)
|
|
self.SubTableCount -= 1
|
|
|
|
# If format-2 subtable created during canonicalization is empty, remove it.
|
|
assert len(self.SubTable) >= 1 and self.SubTable[-1].Format == 2
|
|
if not self.SubTable[-1].Coverage.glyphs:
|
|
self.SubTable.pop(-1)
|
|
self.SubTableCount -= 1
|
|
|
|
merger.mergeObjects(self, lst, exclude=['SubTable', 'SubTableCount'])
|
|
|
|
del merger.lookup_subtables
|
|
|
|
|
|
#
|
|
# InstancerMerger
|
|
#
|
|
|
|
class InstancerMerger(AligningMerger):
|
|
"""A merger that takes multiple master fonts, and instantiates
|
|
an instance."""
|
|
|
|
def __init__(self, font, model, location):
|
|
Merger.__init__(self, font)
|
|
self.model = model
|
|
self.location = location
|
|
self.scalars = model.getScalars(location)
|
|
|
|
@InstancerMerger.merger(ot.Anchor)
|
|
def merge(merger, self, lst):
|
|
XCoords = [a.XCoordinate for a in lst]
|
|
YCoords = [a.YCoordinate for a in lst]
|
|
model = merger.model
|
|
scalars = merger.scalars
|
|
self.XCoordinate = otRound(model.interpolateFromMastersAndScalars(XCoords, scalars))
|
|
self.YCoordinate = otRound(model.interpolateFromMastersAndScalars(YCoords, scalars))
|
|
|
|
@InstancerMerger.merger(otBase.ValueRecord)
|
|
def merge(merger, self, lst):
|
|
model = merger.model
|
|
scalars = merger.scalars
|
|
# TODO Handle differing valueformats
|
|
for name, tableName in [('XAdvance','XAdvDevice'),
|
|
('YAdvance','YAdvDevice'),
|
|
('XPlacement','XPlaDevice'),
|
|
('YPlacement','YPlaDevice')]:
|
|
|
|
assert not hasattr(self, tableName)
|
|
|
|
if hasattr(self, name):
|
|
values = [getattr(a, name, 0) for a in lst]
|
|
value = otRound(model.interpolateFromMastersAndScalars(values, scalars))
|
|
setattr(self, name, value)
|
|
|
|
|
|
#
|
|
# MutatorMerger
|
|
#
|
|
|
|
class MutatorMerger(AligningMerger):
|
|
"""A merger that takes a variable font, and instantiates
|
|
an instance."""
|
|
|
|
def __init__(self, font, location):
|
|
Merger.__init__(self, font)
|
|
self.location = location
|
|
|
|
store = None
|
|
if 'GDEF' in font:
|
|
gdef = font['GDEF'].table
|
|
if gdef.Version >= 0x00010003:
|
|
store = gdef.VarStore
|
|
|
|
self.instancer = VarStoreInstancer(store, font['fvar'].axes, location)
|
|
|
|
def instantiate(self):
|
|
font = self.font
|
|
|
|
for tableTag in 'GSUB','GPOS':
|
|
if not tableTag in font:
|
|
continue
|
|
table = font[tableTag].table
|
|
if not hasattr(table, 'FeatureVariations'):
|
|
continue
|
|
variations = table.FeatureVariations
|
|
for record in variations.FeatureVariationRecord:
|
|
applies = True
|
|
for condition in record.ConditionSet.ConditionTable:
|
|
if condition.Format == 1:
|
|
axisIdx = condition.AxisIndex
|
|
axisTag = self.font['fvar'].axes[axisIdx].axisTag
|
|
Min = condition.FilterRangeMinValue
|
|
Max = condition.FilterRangeMaxValue
|
|
loc = self.location[axisTag]
|
|
if not (Min <= loc <= Max):
|
|
applies = False
|
|
else:
|
|
applies = False
|
|
if not applies:
|
|
break
|
|
|
|
if applies:
|
|
assert record.FeatureTableSubstitution.Version == 0x00010000
|
|
for rec in record.FeatureTableSubstitution.SubstitutionRecord:
|
|
table.FeatureList.FeatureRecord[rec.FeatureIndex].Feature = rec.Feature
|
|
break
|
|
del table.FeatureVariations
|
|
|
|
|
|
self.mergeTables(font, [font], ['GPOS'])
|
|
|
|
if 'GDEF' in font:
|
|
gdef = font['GDEF'].table
|
|
if gdef.Version >= 0x00010003:
|
|
del gdef.VarStore
|
|
gdef.Version = 0x00010002
|
|
if gdef.MarkGlyphSetsDef is None:
|
|
del gdef.MarkGlyphSetsDef
|
|
gdef.Version = 0x00010000
|
|
if not (gdef.LigCaretList or
|
|
gdef.MarkAttachClassDef or
|
|
gdef.GlyphClassDef or
|
|
gdef.AttachList or
|
|
(gdef.Version >= 0x00010002 and gdef.MarkGlyphSetsDef)):
|
|
del font['GDEF']
|
|
|
|
@MutatorMerger.merger(ot.Anchor)
|
|
def merge(merger, self, lst):
|
|
if self.Format != 3:
|
|
return
|
|
|
|
instancer = merger.instancer
|
|
for v in "XY":
|
|
tableName = v+'DeviceTable'
|
|
if not hasattr(self, tableName):
|
|
continue
|
|
dev = getattr(self, tableName)
|
|
delattr(self, tableName)
|
|
if dev is None:
|
|
continue
|
|
|
|
assert dev.DeltaFormat == 0x8000
|
|
varidx = (dev.StartSize << 16) + dev.EndSize
|
|
delta = otRound(instancer[varidx])
|
|
|
|
attr = v+'Coordinate'
|
|
setattr(self, attr, getattr(self, attr) + delta)
|
|
|
|
self.Format = 1
|
|
|
|
@MutatorMerger.merger(otBase.ValueRecord)
|
|
def merge(merger, self, lst):
|
|
|
|
# All other structs are merged with self pointing to a copy of base font,
|
|
# except for ValueRecords which are sometimes created later and initialized
|
|
# to have 0/None members. Hence the copy.
|
|
self.__dict__ = lst[0].__dict__.copy()
|
|
|
|
instancer = merger.instancer
|
|
# TODO Handle differing valueformats
|
|
for name, tableName in [('XAdvance','XAdvDevice'),
|
|
('YAdvance','YAdvDevice'),
|
|
('XPlacement','XPlaDevice'),
|
|
('YPlacement','YPlaDevice')]:
|
|
|
|
if not hasattr(self, tableName):
|
|
continue
|
|
dev = getattr(self, tableName)
|
|
delattr(self, tableName)
|
|
if dev is None:
|
|
continue
|
|
|
|
assert dev.DeltaFormat == 0x8000
|
|
varidx = (dev.StartSize << 16) + dev.EndSize
|
|
delta = otRound(instancer[varidx])
|
|
|
|
setattr(self, name, getattr(self, name) + delta)
|
|
|
|
|
|
#
|
|
# VariationMerger
|
|
#
|
|
|
|
class VariationMerger(AligningMerger):
|
|
"""A merger that takes multiple master fonts, and builds a
|
|
variable font."""
|
|
|
|
def __init__(self, model, axisTags, font):
|
|
Merger.__init__(self, font)
|
|
self.store_builder = varStore.OnlineVarStoreBuilder(axisTags)
|
|
self.setModel(model)
|
|
|
|
def setModel(self, model):
|
|
self.model = model
|
|
self.store_builder.setModel(model)
|
|
|
|
def mergeThings(self, out, lst):
|
|
masterModel = None
|
|
if None in lst:
|
|
if allSame(lst):
|
|
assert out is None, (out, lst)
|
|
return
|
|
masterModel = self.model
|
|
model, lst = masterModel.getSubModel(lst)
|
|
self.setModel(model)
|
|
|
|
super(VariationMerger, self).mergeThings(out, lst)
|
|
|
|
if masterModel:
|
|
self.setModel(masterModel)
|
|
|
|
|
|
def buildVarDevTable(store_builder, master_values):
|
|
if allSame(master_values):
|
|
return master_values[0], None
|
|
base, varIdx = store_builder.storeMasters(master_values)
|
|
return base, builder.buildVarDevTable(varIdx)
|
|
|
|
@VariationMerger.merger(ot.Anchor)
|
|
def merge(merger, self, lst):
|
|
assert self.Format == 1
|
|
self.XCoordinate, XDeviceTable = buildVarDevTable(merger.store_builder, [a.XCoordinate for a in lst])
|
|
self.YCoordinate, YDeviceTable = buildVarDevTable(merger.store_builder, [a.YCoordinate for a in lst])
|
|
if XDeviceTable or YDeviceTable:
|
|
self.Format = 3
|
|
self.XDeviceTable = XDeviceTable
|
|
self.YDeviceTable = YDeviceTable
|
|
|
|
@VariationMerger.merger(otBase.ValueRecord)
|
|
def merge(merger, self, lst):
|
|
for name, tableName in [('XAdvance','XAdvDevice'),
|
|
('YAdvance','YAdvDevice'),
|
|
('XPlacement','XPlaDevice'),
|
|
('YPlacement','YPlaDevice')]:
|
|
|
|
if hasattr(self, name):
|
|
value, deviceTable = buildVarDevTable(merger.store_builder,
|
|
[getattr(a, name, 0) for a in lst])
|
|
setattr(self, name, value)
|
|
if deviceTable:
|
|
setattr(self, tableName, deviceTable)
|